WO2020130200A1 - Motor - Google Patents

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Publication number
WO2020130200A1
WO2020130200A1 PCT/KR2018/016368 KR2018016368W WO2020130200A1 WO 2020130200 A1 WO2020130200 A1 WO 2020130200A1 KR 2018016368 W KR2018016368 W KR 2018016368W WO 2020130200 A1 WO2020130200 A1 WO 2020130200A1
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WO
WIPO (PCT)
Prior art keywords
oil
bearing
nozzles
oil passage
rotor
Prior art date
Application number
PCT/KR2018/016368
Other languages
French (fr)
Korean (ko)
Inventor
정승모
김선호
이장원
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2018/016368 priority Critical patent/WO2020130200A1/en
Publication of WO2020130200A1 publication Critical patent/WO2020130200A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the present invention relates to an electric motor that directly cools a motor with oil.
  • an electric vehicle equipped with an electric motor as a driving source for driving a vehicle has been released as an eco-friendly vehicle because it does not emit exhaust gas.
  • IPGM Intelligent Power Generation Module
  • the electric motor includes a rotor and a stator, and a rotor may be rotatably provided inside the stator.
  • the stator has a stator coil wound on the stator core, and when current is passed through the stator coil to rotate the rotor, techniques are being developed to cool the heat generated by the stator coil and heat generated by the electric motor.
  • cooling the heat generated by the electric motor plays an important role in miniaturization and efficiency improvement of the electric motor.
  • the direct cooling method using oil has an advantage of high cooling efficiency and good cooling performance compared to an indirect cooling method using cooling water, and thus research and development of the direct cooling method has been actively conducted.
  • a conventional electric motor may cool the stator coil by forming an oil injection hole in the upper portion of the motor housing and dropping oil down the stator coil through the oil injection hole.
  • the stacking length of the stator core is increased, and the length of the stator coil is extended in the axial direction. Also, in the case of the rotor, the stacking length of the rotor core is increased.
  • the conventional electric motor has a structure in which the press-in surface of the motor housing into which the stator core is press-in is continuously formed along the circumferential direction, so that oil cannot flow into the press-in surface of the motor housing.
  • the present invention was created to solve the conventional problems, and the stator is sprayed with oil into the stator coil without redesigning the size of the motor housing and the position of the oil injection hole when the stacking length of the stator core increases to increase the output of the motor.
  • An object of the present invention is to provide an electric motor capable of cooling a coil or the like.
  • the present invention is formed by forming a plurality of press-fit surfaces of the motor housing to which the stator core is press-fitted to be spaced apart in the circumferential direction, and forming an oil jetting zone portion between adjacent press-fit surfaces in the circumferential direction, thereby spraying oil to the oil jet zone.
  • Another object is to provide an electric motor capable of cooling the central portion of the stator core and the stator coil.
  • the electric motor includes a motor housing having an accommodation space therein; A stator accommodated inside the motor housing and having a stator core and a coil wound around the stator core; A rotor rotatably mounted inside the stator core about an axis of rotation; A plurality of end covers covering both ends of the motor housing; An oil passage formed inside each of the plurality of end covers; And a plurality of nozzles which are formed to communicate with the oil passage on each inner surface of each of the plurality of end covers, so as to spray oil into the accommodation space.
  • the plurality of nozzles may include a first nozzle that extends axially toward the coil and sprays the oil into the coil.
  • the plurality of nozzles may include a second nozzle extending obliquely toward the rotor to spray the oil into the rotor.
  • the motor housing is arranged spaced apart in the circumferential direction, the stator core is press-fitting a plurality of pressing surfaces; And a plurality of oil injection region portions concavely formed between the plurality of press-in faces adjacent in the circumferential direction.
  • the plurality of nozzles may include a third nozzle that extends axially toward the plurality of oil injection region portions and sprays the oil to the plurality of oil injection region portions.
  • the motor housing may further include a plurality of protruding ribs protruding on the same circumferential surface as the press-fitting surface in each of the plurality of oil injection area portions, and contacting the stator core. have.
  • the end cover the cover body; An oil distribution part extending in a circumferential direction inside the cover body to form the oil passage; And an outer cover part mounted on an outer surface of the cover body to cover the oil distribution part, the plurality of nozzles, one side communicating with the oil distribution part, and the other side protruding from the cover body to the receiving space.
  • it may further include an oil passage formed inside the motor housing.
  • the oil passage of the motor housing and the oil passage of the end cover may be connected to each other in communication.
  • an oil inlet formed in communication with the oil passage of the end cover on each of the plurality of end covers; And an oil outlet formed in communication with the accommodation space under the motor housing.
  • the plurality of nozzles may be spaced apart along a 360 degree circumference.
  • the motor housing may further include an extension portion in which the stacking length of the stator core extends axially.
  • each of the plurality of nozzles is coupled to each of the plurality of nozzles according to the stacking length of the stator core, and may further include a plurality of nozzle extensions extending the length of the nozzle.
  • the bearing receiving portion protruding in the axial direction from the inner surface of the end cover; And a bearing extension part coupled to the bearing accommodation part according to the stacking length of the stator core, and further extending the length of the bearing accommodation part in the axial direction.
  • the bearing oil passage formed inside the bearing receiving portion; A bearing extension oil passage formed inside the bearing extension; And a plurality of bearing nozzles extending in communication with the bearing oil passage or the bearing extension oil passage, and spraying oil toward the bearing.
  • the end cover is further spaced in the circumferential direction inside the oil passage, and further includes a plurality of oil flow barriers to prevent the flow of oil flowing along the oil passage,
  • Each of the plurality of oil flow barriers may extend in a width direction of the oil passage between a plurality of nozzles adjacent in the circumferential direction.
  • the end cover further includes an oil guide wall that extends and rotates a plurality of times in the form of a coil in the interior of the oil passage, and the oil flows along the oil guide wall to the oil passage.
  • a plurality of rotational movements are performed from the outside to the inside, and the plurality of nozzles may be disposed between a plurality of oil guide walls adjacent in the radial direction and spaced apart in the circumferential direction.
  • the rotating shaft is fastened to the rotating shaft, further comprising a fastening member for limiting the axial movement of the rotor, the rotating shaft is spaced from each other in the axial direction according to the stacking length of the rotor,
  • the fastening member may further include a plurality of fastening parts.
  • the fastening member may include at least one of a lock nut to be screwed and a key to be fitted.
  • the fastening part may include at least one of a screw part for screw fastening and a key groove for fitting the key.
  • each of the plurality of end covers forms an oil passage therein, and includes a plurality of nozzles on the inner surface of the end cover, and the plurality of nozzles include a first nozzle and a rotor extending axially toward the stator core and coil. Including the second nozzle extending obliquely toward the motor, even if the stacking length of the stator core is varied to increase the output of the electric motor, there is no need to redesign the nozzle for spraying oil, and spraying oil to the stator core, coil and rotor The efficiency of the electric motor can be increased by cooling the electric motor.
  • the oil injection region between the inner circumferential surface of the motor housing and the outer circumferential surface of the stator core has a narrow gap, so when the distance between the nozzle and the oil injection region increases, it is difficult for the oil sprayed from the nozzle to reach the oil injection region, but the motor
  • the nozzle extension part extends the length of the nozzle by combining the nozzle extension part with the nozzle when the distance between the nozzle and the spraying object increases. Since it can be sprayed exactly where you want, cooling by oil can be done efficiently.
  • the plurality of protruding ribs protrude in contact with the stator core in the oil injection region, thereby increasing the heat exchange area between the stator core and the motor housing.
  • the plurality of protruding ribs can increase the flow rate of the oil by reducing the moving area of the oil flowing along the oil injection region.
  • the plurality of protruding ribs can guide the straightness of the oil flow flowing along the oil injection region.
  • the plurality of protruding ribs protrude in the radial direction from the inner circumferential surface of the motor housing, thereby enhancing the strength of the motor housing.
  • the bearing extension part is attached to the bearing accommodating part of the end cover, so that the position of the bearing can be varied according to the stacking length of the rotor, for example, when the stacking length of the rotor is minimal, the position of the bearing increases the center of gravity of the rotor.
  • the vibration characteristics of the rotor By moving in the direction toward the direction, it is possible to prevent the vibration characteristics of the rotor from becoming unstable due to a change in the distance between the center of gravity of the rotor and the bearing.
  • the bearing nozzle and the bearing extension nozzle can cool the bearing by spraying oil on the bearing by adjusting the position of the bearing extension nozzle formed on the bearing extension, even if the position of the bearing is changed according to the stacking length of the rotor.
  • the oil flow barriers interfere with the flow of oil flowing in the circumferential direction along the oil passage, so that a plurality of nozzles are located on the top of the end cover
  • the oil can be evenly distributed to multiple nozzles regardless of whether it is located at the bottom of the end cover.
  • the inside of the end cover is provided with an oil guide wall in the form of a coil, and the oil guide wall is rotated in the circumferential direction from the uppermost outermost part of the end cover toward the radially inner side by moving the oil introduced through the oil inlet. It is possible to uniformly distribute the oil to a plurality of nozzles, whether the nozzle is located at the top of the end cover or the bottom of the end cover.
  • the rotary core extension part is provided to fit the key into the keyway in close contact with the other end of the rotor core, or by fastening the lock nut to the fastening part formed in the rotation axis extension part, the rotor core Can limit the axial movement.
  • FIG. 1 is a conceptual diagram showing a cover-type oil injection structure of an electric motor according to a first embodiment of the present invention.
  • FIG. 2 is a conceptual diagram showing an embodiment of the electric motor in FIG. 1.
  • FIG. 3 is an exploded view of FIG. 2.
  • FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 2.
  • FIG. 5 is a conceptual view showing a nozzle for spraying oil toward the rotor by enlarging the V part in FIG. 4.
  • FIG. 6 is a conceptual view showing a nozzle spraying oil toward a coil.
  • FIG. 7 is a conceptual view showing a cover-type oil injection structure of an electric motor according to a second embodiment of the present invention.
  • FIG. 8 is a conceptual diagram showing another embodiment of the electric motor in FIG. 7.
  • FIG. 9 is a conceptual view illustrating a nozzle inside the end cover after the outer cover of the end cover is removed in FIG. 8.
  • FIG. 10 is a cross-sectional view along X-X in FIG. 9, and is a conceptual view showing an electric motor having an increased stacking length of a stator and a rotor.
  • FIG. 11 is a conceptual diagram showing an electric motor having a reduced stacking length of the stator and the rotor in FIG. 10.
  • FIG. 12 is a cross-sectional view taken along XII-XII in FIG. 10.
  • FIG. 13 is a conceptual view showing the motor housing after removing the end cover in FIG.
  • FIG. 14 is a cross-sectional view taken along XIV-XIV in FIG. 13.
  • FIG. 15 is a conceptual view illustrating a motor housing after removing the stator core from FIG. 14.
  • FIG. 16 is a conceptual view showing a plurality of nozzles protruding from the inner surface of the end cover in FIG. 10.
  • FIG. 17 is a conceptual view showing a state in which a plurality of protruding ribs are formed in an oil injection region in FIG. 14.
  • FIG. 18 is a conceptual view showing a plurality of protruding ribs after the stator core is deleted in FIG. 17.
  • 19 is a conceptual diagram showing the center of gravity when the stacking length of the rotor according to the present invention is maximum.
  • 20 is a conceptual view showing a state in which the center of gravity changes when the stacking length of the rotor is minimal.
  • 21 is a conceptual view showing a state in which oil is injected through a plurality of nozzles in FIG. 19.
  • FIG. 22 is a conceptual diagram showing a state in which oil is injected through a plurality of nozzles in FIG. 20.
  • FIG. 23 is a conceptual view showing a state in which a plurality of oil flow barriers are formed inside the end cover according to an embodiment of the present invention.
  • 24 is a conceptual view showing a state in which an oil guide wall is formed inside the end cover according to another embodiment of the present invention.
  • 25 is a conceptual view showing a state in which the fastening position of the lock nut is changed according to the stacking length of the rotor core according to an embodiment of the present invention.
  • 26 is a conceptual view showing a state in which the key is fastened to the keyway according to the stacking length of the rotor core according to another embodiment of the present invention.
  • 27 to 29 are conceptual views illustrating a state in which keys are coupled to key grooves formed at different positions according to the stacking length of the rotor core according to another embodiment of the present invention.
  • FIG. 1 is a conceptual diagram showing a cover-type oil injection structure of an electric motor according to a first embodiment of the present invention
  • FIG. 2 is a conceptual diagram showing an embodiment of the electric motor in FIG. 1
  • FIG. 3 is an exploded view of FIG. 2
  • 4 is a cross-sectional view taken along IV-IV in FIG. 2
  • FIG. 5 is a conceptual view showing a nozzle 127 injecting oil toward the rotor 120 by enlarging the V part in FIG. 4
  • FIG. 6 is a coil 112 ) Is a conceptual diagram showing a nozzle 127 for spraying oil.
  • the electric motor of the present invention may include a motor housing 100, a stator 110, a rotor 120, and an end cover 122.
  • the motor housing 100 may be formed in a cylindrical shape.
  • the motor housing 100 may form the appearance of the electric motor.
  • the motor housing 100 may be integrally formed with an inverter housing that accommodates an inverter of IPGM.
  • An accommodating space is formed inside the motor housing 100, and both ends are opened in the longitudinal direction of the motor housing 100, so that the stator 110 and the rotor 120 can be accommodated in the accommodating space.
  • the stator 110 may include a stator core 111 and a coil 112.
  • the stator core 111 may be formed in a cylindrical shape by stacking a plurality of electrical steel plates in the axial direction.
  • a plurality of slots 1110 (Slot) and a plurality of teeth (1111; teeth) may be alternately spaced in the circumferential direction inside the stator core 111.
  • the coil 112 is inserted into the slot 1110 and can be wound inside the stator core 111.
  • the coil 112 may be configured by connecting a plurality of conductors. Each of the plurality of conductors may be formed in a hairpin type.
  • the coil 112 is composed of three phases, and three-phase AC power may be applied to the coil 112.
  • Each of the three-phase coils 112 may be connected by a power supply busbar. Each end of the three-phase coil 112 may be connected by a neutral busbar.
  • the rotor 120 may be arranged to be accommodated inside the stator 110.
  • a rotor accommodating hole may be formed through the axial direction inside the stator core 111.
  • the rotor 120 may be accommodated in a rotor receiving hole, and an air gap may be disposed between the stator 110 and the rotor 120 to be rotatable with respect to the stator 110 to be mounted on the rotating shaft 133.
  • the rotor 120 may be composed of a rotor core 121 and a plurality of permanent magnets.
  • the rotor core 121 may be configured in a cylindrical shape by stacking a plurality of electrical steel sheets.
  • a rotating shaft receiving hole is formed through the axial direction in the central portion of the rotor core 121, and the rotating shaft 133 may be inserted and coupled to the rotating shaft receiving hole.
  • the permanent magnet may be mounted inside the rotor core 121.
  • the permanent magnet can rotate the rotor 120 by forming a rotating magnetic field by interacting with a magnetic field generated around the coil 112.
  • the power line connection part is installed at one end of the motor housing 100, and a bus bar for supplying power may be accommodated inside the power line connection part.
  • the plurality of end covers 122 may be mounted on both ends of the motor housing 100 so as to cover both ends of the motor housing 100.
  • a neutral wire connector is installed on one side of the end cover 122, and a neutral wire bus bar may be accommodated inside the neutral wire connector.
  • the oil passage 101 may be formed inside the motor housing 100.
  • the oil inlet 102 is formed on the upper part of the motor housing 100, and oil may be introduced into the oil passage 101 of the motor housing 100 through the oil inlet 102.
  • the oil flowing into the oil passage 101 of the motor housing 100 may heat the stator core 111 to cool the stator core 111.
  • An oil passage 123 may be formed in each of the plurality of end covers 122.
  • Oil inlets 124 may be provided on the outer surfaces of each of the plurality of end covers 122.
  • the oil inlet 124 is formed to communicate with the oil passage 123 of the end cover 122, so that the oil may flow into the oil passage 123 of the end cover 122 through the oil inlet 124.
  • the oil passage 123 of the end cover 122 and the oil passage 101 of the motor housing 100 may be connected in communication with each other.
  • the oil introduced into the oil passage 123 of the end cover 122 may cool the end cover 122.
  • the end cover 122 may include a bearing receiving portion 125.
  • the bearing 126 may be installed inside the bearing accommodation portion 125.
  • the bearing 126 installed in each of the plurality of end covers 122 may rotatably support both ends of the rotating shaft 133.
  • the oil of the end cover 122 exchanges heat with the bearing 126 to cool the bearing 126.
  • a plurality of nozzles 127 are formed on the inner surfaces of each of the plurality of end covers 122, so that oil may be injected into the receiving space of the motor housing 100 through the plurality of nozzles 127.
  • the plurality of nozzles 127 may be connected to one side in communication with the oil passage 123 and the other side in communication with the receiving space of the motor housing 100.
  • the plurality of nozzles 127 are extended in an axial direction (horizontal direction or a direction parallel to the rotation axis 133) or inclined inside the end cover 122, so that the oil is axially toward the stator 110 or the rotor 120. Can be sprayed in any direction.
  • the plurality of nozzles 127 may include first nozzles 128 to second nozzles 129.
  • the first nozzle 128 is formed to extend in the axial direction inside the end cover 122, it is possible to spray the oil to the coil 112 (see Fig. 6).
  • the second nozzle 129 extends obliquely at a predetermined angle with respect to the axial direction inside the end cover 122 to spray oil toward the rotor 120 (see FIG. 5 ).
  • the plurality of nozzles 127 are spaced apart along the circumference of 360 degrees, so that the entire circumferential surface of the coil 112 can be directly sprayed with oil.
  • the end cover 122 may be composed of a cover body 130 and an outer cover portion 131.
  • the bearing accommodation portion 125 is provided at the center of the cover body 130, and the bearing 126 may be accommodated inside the bearing accommodation portion 125.
  • the oil distribution unit 132 may be extended along the circumferential direction inside the cover body 130.
  • the oil distribution part 132 may form an oil passage 123.
  • the oil distribution part 132 may be connected to one side in communication with the oil inlet 124, and the other side in communication with a plurality of nozzles 127.
  • oil may be introduced into the oil distribution unit 132 through the oil inlet 124.
  • the oil distribution unit 132 may distribute oil to a plurality of nozzles 127.
  • the inner surface of the oil distribution unit 132 is blocked except for a hole communicating with the nozzle 127, and the outer surface of the oil distribution unit 132 may be opened.
  • the bearing accommodating part 125 is opened toward the accommodating space of the motor housing 100 so that the bearing 126 can be accommodated in the bearing accommodating part 125.
  • the outer cover part 131 may be mounted on the outer surface of the cover body 130 to cover the oil distribution part 132.
  • a plurality of fastening holes may be formed through the edges of each of the outer cover portion 131 and the cover body 130.
  • the plurality of fastening members may fasten the outer cover portion 131 and the cover body 130 through the fastening holes.
  • a plurality of oil outlets 103 are formed on the bottom surface of the motor housing 100 to allow oil to flow out.
  • the plurality of oil outlets 103 may be respectively disposed at both ends of the outer circumferential surface of the motor housing 100.
  • the oil outlet 103 may be connected to an oil pump.
  • the oil pump is connected to the discharge port in communication with the oil inlet 124, and pumps the oil spilled through the oil outlet 103 to be transported to the oil inlet 124 for circulation.
  • each of the plurality of end covers 122 forms an oil passage 123 therein
  • a plurality of nozzles 127 are provided on the inner surface of the end cover 122
  • a plurality of nozzles ( 127) includes a stator core 111 and a first nozzle 128 extending axially toward the coil 112 and a second nozzle 129 extending obliquely toward the rotor 120, thereby increasing the output of the electric motor
  • the efficiency of the electric motor can be increased by cooling the electric motor.
  • the plurality of nozzles 127 are spaced apart along the entire circumference of 360 degrees, it is possible to uniformly cool along the entire circumferential surface of each of both ends of the stator core 111 or the coil 112.
  • FIG. 7 is a conceptual diagram showing a cover type oil injection structure of an electric motor according to a second embodiment of the present invention
  • FIG. 8 is a conceptual diagram showing another embodiment of the electric motor in FIG. 7
  • FIG. 9 is an end cover 210 in FIG. 8
  • FIG. 10 is a cross-sectional view along XX in FIG. 9, which is a conceptual view showing an electric motor having an increased stacking length of a stator and a rotor.
  • 11 is a conceptual view showing an electric motor having a reduced stacking length of a stator and a rotor in FIG. 10
  • FIG. 12 is a cross-sectional view taken along XII-XII in FIG.
  • FIG. 10 is a motor after removing the end cover 210 in FIG.
  • FIG. 14 is a cross-sectional view taken along XIV-XIV in FIG. 13
  • FIG. 15 is a conceptual diagram showing the motor housing 200 after removing the stator core 215 in FIG. Is a conceptual view showing a plurality of nozzles 218, 219 and 220 protruding from the inner surface of the end cover 210 in FIG.
  • the present invention can increase the stacking length of the stator core 215 in the axial direction or increase the stacking length of the rotor core 217 in the axial direction to increase the output of the electric motor.
  • the motor housing 200 may further include an extension 202.
  • the extension portion 202 means a portion in which the length of the motor housing 200 extends in the longitudinal direction or in the axial direction.
  • the length of the motor housing 200 may be extended such that the stacking length of the stator core 215 or the rotor core 217 is axially scalable.
  • the oil passage 201 of the motor housing 200 and the oil passage 213 of the end cover 210 may be connected to each other in communication.
  • the oil inlet 214 is not formed in the motor housing 200, and the oil inlet 214 may be provided only in each of the plurality of end covers 210.
  • the plurality of end covers 210 may include a front cover 211 and a rear cover 212.
  • the front cover 211 has an axial through hole in the center, and a rotation shaft 133 may penetrate through the axial through hole to protrude out of the front cover 211.
  • the rear cover 212 is provided with a hole for shafting in the center, but the rotation shaft 133 may be accommodated in the shafting hole of the rear cover 212 without protruding to the outside of the rear cover 212.
  • the extension 202 may be formed inside one end of the motor housing 200 facing the rear cover 212.
  • a plurality of first nozzles 218 to a plurality of third nozzles 220 may be provided on the inner surface of the plurality of end covers 210.
  • the plurality of first nozzles 218 may extend to protrude in the axial direction from the end cover 210, and may be configured to spray oil to the stator core 215 and the coil 216.
  • the plurality of second nozzles 219 extends obliquely from the end cover 210 toward the rotor, and may be configured to spray oil on the rotor.
  • the plurality of first nozzles 218 and the plurality of second nozzles 219 may be alternately arranged in a circumferential direction.
  • the plurality of first nozzles 218 and the plurality of second nozzles 219 may be disposed to overlap the slot 1110 or the teeth 1111 of the stator core 215 in the axial direction.
  • the plurality of third nozzles 220 may be configured to spray oil to a plurality of oil injection area portions 204 formed between the motor housing 200 and the stator core 215.
  • Each of the plurality of nozzles 218, 219, and 220 may protrude in a pipe shape or may be formed in an elongated hole shape inside the end cover 210.
  • a plurality of nozzles 218, 219, and 220 are shown protruding in the form of a pipe.
  • Each of the plurality of nozzles 218, 219 and 220 protruding from the front cover 211 may protrude longer in the axial direction than the plurality of nozzles 218, 219 and 220 protruding from the rear cover 212.
  • the stator core 215 may be pressed into the inner circumferential surface of the motor housing 200.
  • a plurality of press-in surfaces 203 through which the stator core 215 is pressed may be formed to be spaced apart in a circumferential direction on a plurality of inner circumferential surfaces of the motor housing 200.
  • Each of the plurality of press-in surfaces 203 may extend in the axial direction.
  • a protrusion 2031 may be protruded on each of the plurality of press-in surfaces 203. The protrusion 2031 is caught by the protrusion 2031 when the stator core 215 is pressed into the press-in surface 203 of the motor housing 200, so that the stator core 215 is axially deviated from the press-in surface 203. Can be prevented.
  • the plurality of oil injection region portions 204 and the plurality of press-in surfaces 203 may be alternately formed in the circumferential direction.
  • the oil injection region portion 204 may be formed between two press-fit surfaces 203 adjacent in the circumferential direction.
  • the plurality of oil injection area portions 204 may be spaced apart along the entire circumferential surface of 360 degrees.
  • the plurality of third nozzles 220 may extend from the end cover 210 to protrude in the axial direction toward the oil injection area portion 204.
  • the plurality of third nozzles 220 may be disposed to overlap with the oil injection region portion 204 in the axial direction.
  • the oil is sprayed on the oil injection region portion 204 formed between the outer circumferential surface of the stator core 215 and the inner circumferential surface of the motor housing 200, so that the front and rear ends of the stator core 215, as well as the stator Oil penetrates to the central portion of the core 215 to smoothly cool the entire circumferential surface of the stator core 215.
  • the plurality of nozzles 218, 219, and 220 may be disposed closest to one end of the stator core 215 in the axial direction when the stacking length of the stator core 215 is maximum.
  • the plurality of nozzles 218, 219 and 220 may be disposed farthest in the axial direction with one end of the stator core 215 when the stacking length of the stator core 215 is minimally short.
  • the first nozzle 218 extending in the axial direction is affected by the injection pressure or gravity of the oil to coil the oil 216 May not be sprayed.
  • the oil injection region 204 has nozzles 218, 219 and 220 to allow oil to penetrate into the oil injection region 204. It is desirable that the distance between the oil injection regions is close.
  • the nozzles 218, 219, 220 need to extend the lengths of the nozzles 218, 219, 220 in order to aim and aim the oil injection direction according to the stacking length of the stator core 215.
  • the distance between the nozzles 218, 219 and 220 and the stator core 215 and the end coil 216 is far apart, so it is preferable that the length of the nozzles 218 and 219 and 220 be extended.
  • a plurality of nozzle extensions 221 are coupled to the plurality of nozzles 218, 219, 220, respectively, to extend the length of the nozzles 218, 219, 220.
  • the nozzles 218, 219, and 220 may be press-fitted or screwed into one end of the nozzle extension portion 221.
  • the nozzle 218, 219, 220 nozzles when the distance between the nozzles 218, 219, 220 and the spray target increases.
  • the first nozzle 218 may cool the stator by spraying oil to the stator core 215 and the coil 216.
  • the second nozzle 219 may cool the rotor by spraying oil with the rotor.
  • the third nozzle 220 cools the central portion of the stator core 215 and the coil 216 by spraying oil to the oil injection area portion 204 between the outer circumferential surface of the stator core 215 and the inner circumferential surface of the motor housing 200. can do.
  • the nozzle extension portion 221 may be selectively coupled to the nozzle according to the stacking length of the stator core 215.
  • FIG. 17 is a conceptual view showing a state in which a plurality of protruding ribs 222 are formed in the oil injection area part 204 in FIG. 14, and FIG. 18 is a plurality of protruding ribs 222 after the stator core 215 is deleted in FIG. It is a conceptual diagram showing ).
  • Each of the plurality of oil injection area portions 204 may have a circular arc length longer than that of the press-in surface 203.
  • a plurality of protruding ribs 222 may be further provided in each of the plurality of oil injection region portions 204.
  • Each of the plurality of protruding ribs 222 may be formed to protrude in the radially inner direction from the radially outer surface of the oil injection region portion 204.
  • the inner ends of the plurality of protruding ribs 222 are located on the same circumferential surface as the press-fitting surface 203, so that the plurality of protruding ribs 222 and the outer circumferential surfaces of the stator core 215 may contact each other.
  • Each of the plurality of protruding ribs 222 may extend in the axial direction.
  • the protruding rib 222 may be formed in a rectangular cross-sectional shape.
  • the plurality of protruding ribs 222 may be spaced apart in the circumferential direction of the oil injection region portion 204.
  • the spacing between the plurality of protruding ribs 222 may be formed to be wider than the horizontal length (circumferential width) of the protruding ribs 222.
  • the plurality of protruding ribs 222 may contact the stator core 215 to increase the heat exchange area between the stator core 215 and the motor housing 200.
  • the plurality of protruding ribs 222 may increase the flow rate of the oil by reducing the moving area of the oil flowing along the oil injection area portion 204.
  • the plurality of protruding ribs 222 may guide the straightness of the oil flow flowing along the oil injection area portion 204.
  • the plurality of protruding ribs 222 may protrude in the radial direction from the inner circumferential surface of the motor housing 200 to reinforce the strength of the motor housing 200.
  • FIG. 19 is a conceptual diagram showing the center of gravity 312 when the stacking length of the rotor according to the present invention is the maximum
  • FIG. 20 is a conceptual diagram showing the shape of the center of gravity 312 changing when the stacking length of the rotor is the minimum
  • 21 is a conceptual diagram showing a state in which oil is injected through a plurality of nozzles 326 in FIG. 19
  • FIG. 22 is a conceptual view showing a state in which oil is injected through a plurality of nozzles 326 in FIG.
  • An axial movement limiting protrusion 303 is formed on one side of the rotating shaft 300, so that the rotor can be restricted from moving in the axial direction from the rotating shaft 300.
  • the axial movement limiting projection 303 may be integrally formed with the rotating shaft 300 to fix one end of the rotor in the rotating shaft 300.
  • the axial movement limiting projection 303 may be formed to protrude radially from the rotating shaft 300.
  • the other end of the rotor core 310 may be fixed by a lock nut (304).
  • Lock nut 304 is screwed to the other side of the rotating shaft 300, it is possible to limit the rotor core 310 to move in the opposite axial direction.
  • the rotor may be composed of a rotor core 310, a permanent magnet and an end plate 311.
  • the rotor core 310 may be formed by stacking and combining a plurality of electrical steel sheets.
  • the plurality of permanent magnets may be embedded and installed in the rotor core 310.
  • the end plates 311 may be respectively installed at both ends of the rotor core 310 to prevent the permanent magnets from being separated from the rotor core 310 in the axial direction.
  • the axial movement limiting projection 303 is fixed at the rotating shaft 300, so that even if the stacking length of the rotor core 310 increases in the axial direction, one end of the rotor core 310 remains at the axial movement limiting projection 303. There is no change in the position.
  • the center of gravity 312 of the rotor may move.
  • the center of gravity 312 of the rotor moves away from the axial movement limiting projection 303, and when the stacking length of the rotor core 310 decreases, the center of gravity of the rotor decreases. 312 may move closer to the axial movement limiting projection 303.
  • the distance between the center of gravity 312 of the rotor and the bearing 126 is changed due to the movement of the center of gravity 312 of the rotor as the stacking length of the rotor core 310 changes, and the vibration characteristics of the rotor become unstable. Can.
  • one end of the rotor is fixed by the axial movement limiting projection 303, and the other end of the rotor spaced apart from the axial movement limiting projection 303 in the opposite axial direction is Location can be changed.
  • the bearing 126 rotatably supporting one end of the rotating shaft 300 disposed close to the axial movement limiting projection 303 is fixed regardless of the stacking length of the rotor core 310, and the axial movement limiting projection 303 ) It is preferable that the bearing 126 rotatably supporting the other end of the rotating shaft 300 disposed away from the rotor core 310 according to a change in the stacking length of the rotor core 310.
  • the present invention further includes a bearing extension 314, the bearing extension 314 may be configured to adjust the position of the bearing 126 according to the stacking length of the rotor core 310.
  • the bearing extension portion 314 is coupled to the bearing receiving portion 313 when the center of gravity 312 of the rotor moves in the axial direction approaching the axial movement limiting projection 303, so that the position of the bearing 126 can be changed. have.
  • the rotating shaft 300 may include a first rotating shaft portion 301 and a second rotating shaft portion 302.
  • the first rotating shaft portion 301 supports the rotor core 310 and may have a larger diameter than the second rotating shaft portion 302.
  • the second rotating shaft portion 302 supports the bearing 126 and may have a smaller diameter than the first rotating shaft portion 301.
  • the bearing 126 without the bearing extension 314 may be installed to be accommodated in the bearing receiving portion 313 formed on the end cover 210.
  • the bearing 126 is accommodated inside one end of the bearing extension 314 and mounted on the second rotating shaft 302, the other end of the rotating shaft 300 Can be rotatably supported.
  • the position of the bearing 126 accommodated inside the bearing extension 314 may be changed according to the stacking length of the rotor core 310.
  • the bearing 126 may be disposed adjacent to one end of the bearing extension 314 in a direction closer to the center of gravity 312 of the rotor.
  • the bearing extension 314 can vary the position of the bearing 126 according to the stacking length of the rotor, for example, when the stacking length of the rotor is minimal, the position of the bearing 126 is By moving in the direction toward the center of gravity 312, the vibration characteristics of the rotor can be prevented from becoming unstable due to a change in the distance between the center of gravity 312 of the rotor and the bearing 126.
  • the plurality of nozzles 326 may further include a bearing nozzle 317 spraying oil on the bearing 126.
  • the bearing oil passage 315 may be formed inside the bearing receiving portion 313.
  • the bearing oil passage 315 may extend in the axial direction.
  • the bearing oil passage 315 may be connected to the oil passage 213 of the end cover 210 in communication.
  • One end of the bearing oil passage 315 is connected in communication with the oil passage 213 of the end cover 210, a plurality of second nozzles 219 for spraying oil toward the rotor to the other end of the bearing oil passage 315 It can be formed.
  • the end cover 210 may include a plurality of first nozzles 218 spraying oil toward the stator core 215 and the coil 216.
  • the end cover 210 may include a plurality of third nozzles 220 for spraying oil into the oil injection region 204 between the stator core 215 and the motor housing 200.
  • the third nozzle 220 is disposed on the outermost side in the radial direction of the end cover 210, and the first nozzle 218 is the third nozzle 220 and the second nozzle 219 in the radial direction of the end cover 210 ).
  • the end cover 210 may further include a plurality of bearing nozzles 317 spraying oil into the bearing 126.
  • the bearing nozzle 317 may be connected to the bearing oil passage 315 in communication. Each of the plurality of bearing nozzles 317 may extend obliquely toward the bearing 126 on the inner surface of the bearing receiving portion 313.
  • a bearing extension oil passage 316 may be formed inside the bearing extension part 314.
  • the bearing extension oil passage 316 may extend in the axial direction.
  • the bearing extension oil passage 316 may be connected to the bearing oil passage 315 in communication.
  • One end of the bearing extension oil passage 316 may be connected to the bearing oil passage 315 in communication, and a second nozzle 219 for spraying oil toward the rotor may be formed at the other end of the bearing extension oil passage 316.
  • a plurality of bearing extension nozzles 318 may be formed on the inner surface of the bearing extension part 314 to communicate with the bearing extension oil passage 316.
  • FIG. 23 is a conceptual view showing a state in which a plurality of oil flow barriers 320 are formed inside the end cover 210 according to an embodiment of the present invention.
  • An oil inlet 214 may be formed on the top of the end cover 210.
  • the oil passage 213 is extended along the circumferential direction inside the end cover 210, so that the oil can flow in the circumferential direction along the oil passage 213.
  • the oil introduced through the oil inlet 214 branches in both directions (clockwise and counterclockwise) from the top of the end cover 210 and moves along the circumferential direction in opposite directions and flows downward.
  • the width of the oil passage 213 may be defined as ⁇ diameter of the end cover 210-bearing accommodating portion 313 ⁇ X1/2.
  • the bearing accommodating portion 313 may be formed at the central portion of the end cover 210.
  • the oil passage 213 is filled upward from the bottom of the oil passage 213, so that the oil flows into the oil passage 213 of the end cover 210 through the oil inlet 214.
  • the rate of oil rise may be slowed down.
  • the nozzle 326 disposed on the upper portion of the end cover 210 is delayed due to a delay in the oil supply speed compared to the nozzle 326 disposed on the lower portion of the end cover 210, for example, the coil 216.
  • the upper portion of the coil 216 may have a problem that the temperature rises compared to the lower portion.
  • a plurality of oil flow barriers 320 may be provided inside the end cover 210.
  • the oil flow barrier wall 320 may extend radially.
  • the plurality of oil flow blocking walls 320 may be spaced apart in the circumferential direction.
  • the oil flow blocking wall 320 may prevent oil from flowing in the circumferential direction.
  • the radially inner end of the oil flow obstruction wall 320 is connected to the outer surface of the bearing accommodating portion 313, and the outer end of the oil flow obstruction wall 320 is radially inside the outer surface of the end cover 210. It is formed to be spaced apart in the direction, the oil can move to the adjacent oil flow barrier wall 320 in the circumferential direction.
  • a communication hole is formed at an outer end of the oil flow barrier wall 320 so that the oil can move along the oil passage 213 in the circumferential direction through the communication hole.
  • a plurality of nozzles 326 may be disposed between two oil flow barriers 320 adjacent in the circumferential direction.
  • the plurality of oil flow blocking walls 320 positioned on the upper end of the end cover 210 may serve to trap oil. Oil flows between the two oil flow barriers 320 located at the top, and may be filled with a certain amount of the two oil flow barriers 320.
  • the oil flow barrier wall 320 prevents the flow of oil flowing in the circumferential direction along the oil flow path 213, so that the plurality of nozzles 326 are located on the top of the end cover 210 or the end cover
  • the oil may be evenly distributed to the plurality of nozzles 326 regardless of whether it is located at the bottom of the 210.
  • 24 is a conceptual view showing a state in which an oil guide wall 321 is formed inside the end cover 210 according to another embodiment of the present invention.
  • An oil inlet 214 may be formed on the upper end cover.
  • An oil guide wall 321 may be formed inside the end cover 210.
  • the oil guide wall 321 may form an oil passage 213.
  • the oil guide wall 321 may be formed in a concentric circular shape or a coiled shape.
  • the oil guide wall 321 may be formed such that the radius of curvature becomes smaller as it goes from the outermost portion to the inner direction in the radial direction of the end cover 210.
  • the oil guide wall 321 is rotated several times in the circumferential direction and can be extended to one wall.
  • the oil guide wall 321 may be extended to rotate 360 degrees three wheels.
  • a plurality of nozzles 326 may be formed between radially adjacent oil guide walls 321.
  • One end of the oil guide wall 321 may be connected to the inner surface of the outer portion of the end cover 210, and the other end of the oil guide wall 321 may be connected to the outer portion of the bearing receiving portion 313.
  • a plurality of nozzles 326 may be spaced apart in the circumferential direction between the oil guide walls 321 adjacent in the radial direction.
  • the plurality of nozzles 326 may be spaced apart along the oil passage 213 formed by the oil guide wall 321.
  • the oil guide wall 321 rotates the oil introduced through the oil inlet 214 in a circumferential direction from the outermost upper portion of the end cover 210 toward the radially inner side, thereby providing a plurality of nozzles 326 ) May be uniformly distributed to the plurality of nozzles 326, whether located at the top of the end cover 210 or the bottom of the end cover 210.
  • FIG. 25 is a conceptual view showing a state in which the fastening position of the lock nut 304 is changed according to the stacking length of the rotor core 310 according to an embodiment of the present invention
  • FIG. 26 is a rotor according to another embodiment of the present invention
  • It is a conceptual diagram showing a state in which the key 325 is fastened to the key groove 324 according to the stacking length of the core 310
  • FIGS. 27 to 29 are stacking lengths of the rotor core 310 according to another embodiment of the present invention.
  • the rotary shaft extension part 305 is provided to the rotor core 310 to extend in the axial direction. It can be further provided.
  • a fastening part 322 may be formed on the rotating shaft 300 for fastening the lock nut 304.
  • the fastening portion 322 may be arranged to be spaced axially from the axial movement limiting projection 303.
  • At least one fastening portion 322 is further formed on the rotating shaft extension 305, and when the stacking length of the rotor core 310 increases, at the other end of the rotor core 310 extending to the rotating shaft extension 305
  • the lock nut 304 can be fastened in close contact.
  • a plurality of key grooves 324 may be formed on the rotating shaft 300 to be spaced apart in the axial direction.
  • a key 325 may be selectively fitted to the plurality of key grooves 324.
  • the key 325 is fitted into the key groove 324 to be in close contact with the other end of the rotor core 310, so that the rotor core 310 is axial. You can limit the movement.
  • key grooves 324 formed on the rotation shaft 300 may be formed at various positions.
  • the stacking length of the rotor core 310 is minimum to the position of the other end of the rotor core 310. It can be formed continuously.
  • the position of the other end of the rotor core 310 means a position spaced apart by the stacking length of the rotor core 310 from the axial movement limiting projection 303.
  • the key groove 324 may be continuously formed from one end of the rotating shaft 300 to the position of the other end of the rotor core 310 when the stacking length of the rotor core 310 is minimal.
  • the lock nut 304 and the key 325 may be selectively applied or both may be applied to limit the axial movement of the rotor core 310.
  • the position of the keyway 324 is different from the embodiment of FIG. 27.
  • the key groove 324 illustrated in FIG. 28 is shorter in length than the key groove 324 of FIG. 27 and may be disposed at one end of the rotation shaft 300.
  • the keyway 324 of FIG. 28 may be applied when the minimum stacking length of the rotor core 310 is longer than the minimum stacking length of the rotor core 310 of FIG. 27.
  • the key groove 324 illustrated in FIG. 29 is shorter than the key groove 324 of FIG. 27 and may be disposed between one end of the rotary shaft 300 and the axial movement limiting projection 303.
  • the keyway 324 of FIG. 29 has the same minimum length as the minimum stacking length of the rotor core 310 compared to the minimum stacking length of the rotor core 310 of FIG. 27, and the maximum stacking length of the rotor core 310 is shown in FIG. It may be applied in a shorter case than the maximum stacking length of the rotor core 310.

Abstract

The present invention relates to a motor for directly cooling a motor with oil, and the motor comprises: a motor housing in which an accommodation space is provided; a stator which is accommodated inside the motor housing, and which has a stator core and a coil wound on the stator core; a rotor rotatably mounted around a rotary shaft inside the stator core; a plurality of end covers for covering both end portions of the motor housing; oil flow paths formed inside each of the plurality of end covers; and a plurality of nozzles formed on the inner side surface of each of the plurality of end covers so as to communicate with the oil flow paths, thereby spraying oil into the accommodation space.

Description

전동기Electric motor
본 발명은 오일로 직접 모터를 냉각하는 전동기에 관한 것이다.The present invention relates to an electric motor that directly cools a motor with oil.
최근 차량의 주행용 구동원으로 전동기를 구비하는 전기자동차는 배기가스를 배출하지 않아서 친환경 자동차로 출시되고 있다.Recently, an electric vehicle equipped with an electric motor as a driving source for driving a vehicle has been released as an eco-friendly vehicle because it does not emit exhaust gas.
일반적으로 IPGM(지능형 동력생성모듈; Intelligent Power Generation Module)은 전동기, 인버터 및 기어박스로 구성된 장치이다.In general, IPGM (Intelligent Power Generation Module) is a device composed of an electric motor, an inverter, and a gearbox.
전동기는 로터와 스테이터를 구비하고, 스테이터의 내부에 로터가 회전 가능하게 구비될 수 있다.The electric motor includes a rotor and a stator, and a rotor may be rotatably provided inside the stator.
스테이터는 스테이터 코어에 권선되는 스테이터 코일을 구비하고, 로터를 회전시키기 위해 스테이터 코일에 전류를 흘려보내면, 스테이터 코일에서 열이 발생하고, 전동기에서 발생하는 열을 냉각하기 위한 기술들이 개발되고 있다.The stator has a stator coil wound on the stator core, and when current is passed through the stator coil to rotate the rotor, techniques are being developed to cool the heat generated by the stator coil and heat generated by the electric motor.
전기자동차의 전동기에 있어서, 전동기에서 발생하는 열을 냉각하는 것이 전동기의 소형화 및 효율 향상 측면에서 중요한 역할을 한다.In the electric motor of an electric vehicle, cooling the heat generated by the electric motor plays an important role in miniaturization and efficiency improvement of the electric motor.
종래의 전동기 냉각방식에는, 냉각수를 하우징 내부에 순환시켜 모터를 간접 냉각하는 간접 냉각 방식과, 오일을 스테이터나 로터 등에 분사하여 모터를 직접적으로 냉각하는 직접 냉각 방식이 채용되고 있다.In the conventional motor cooling method, an indirect cooling method in which the motor is indirectly cooled by circulating cooling water inside the housing and a direct cooling method in which oil is directly cooled by spraying oil to a stator or a rotor are adopted.
오일을 이용한 직접 냉각 방식은 냉각수를 이용한 간접 냉각 방식에 비해 냉각효율이 높고 냉각성능이 좋은 장점이 있어서, 최근 직접 냉각 방식에 대한 연구 개발이 활발히 진행되고 있다.The direct cooling method using oil has an advantage of high cooling efficiency and good cooling performance compared to an indirect cooling method using cooling water, and thus research and development of the direct cooling method has been actively conducted.
예를 들면, 종래의 전동기는 모터하우징의 상부에 오일분사홀(oil injection hole)을 형성하고, 오일분사홀을 통해 오일을 스테이터코일에 하방향으로 떨어뜨려 스테이터 코일을 냉각할 수 있다.For example, a conventional electric motor may cool the stator coil by forming an oil injection hole in the upper portion of the motor housing and dropping oil down the stator coil through the oil injection hole.
한편, 전기자동차의 동력원으로 사용하기 위해 전동기의 출력을 증대시켜야 할 필요가 있었고, 전동기의 출력을 높이기 위해서는 로터 및 스테이터의 크기를 증대시키는 것이 필수적이다.On the other hand, it was necessary to increase the output of the electric motor for use as a power source of the electric vehicle, and to increase the output of the electric motor, it is essential to increase the size of the rotor and the stator.
예를 들면, 스테이터의 경우 스테이터코어의 적층길이가 증가하고, 스테이터코일의 길이가 축방향으로 연장되게 된다. 또한, 로터의 경우에도 로터코어의 적층길이가 증가하게 된다.For example, in the case of a stator, the stacking length of the stator core is increased, and the length of the stator coil is extended in the axial direction. Also, in the case of the rotor, the stacking length of the rotor core is increased.
그러나, 종래의 전동기는 스테이터코어의 적층길이(축방향 길이)가 증가하면 모터 하우징의 크기를 증대시켜야 함은 물론, 오일분사홀의 위치를 변경해야 하므로, 기존의 모터 하우징에 형성될 오일분사홀을 재설계해야 하며, 이로 인해, 제조비용이 상승하는 문제점이 있다.However, in the conventional electric motor, when the stacking length (axial length) of the stator core increases, the size of the motor housing must be increased and the position of the oil injection hole must be changed. Therefore, the oil injection hole to be formed in the existing motor housing is It has to be redesigned, and there is a problem that manufacturing cost increases.
또한, 종래의 전동기는 스테이터코어가 압입되는 모터 하우징의 압입면이 원주방향을 따라 연속해서 형성되어, 오일이 모터 하우징의 압입면에 유입될 수 없는 구조이다.In addition, the conventional electric motor has a structure in which the press-in surface of the motor housing into which the stator core is press-in is continuously formed along the circumferential direction, so that oil cannot flow into the press-in surface of the motor housing.
이로 인해, 오일이 스테이터코일의 엔드코일(end coil; 슬롯의 외부로 돌출된 코일의 끝부분)로 직접 분사되어, 엔드코일의 냉각은 잘 되지만, 오일이 없는 스테이터코어 및 스테이터코일의 중앙부는 온도가 상승하여, 전동기의 온도가 길이방향으로 양단부와 중앙부의 위치에 따라 불균일하게 되는 문제가 발생한다.Due to this, the oil is sprayed directly into the end coil of the stator coil (the end of the coil protruding out of the slot), so that the end coil is cooled well, but the stator core without oil and the central portion of the stator coil are temperature As the temperature rises, a problem arises in that the temperature of the electric motor becomes non-uniform depending on the position of both ends and the center in the longitudinal direction.
또한, 스테이터 코어의 중앙부는 냉각이 원활히 이루어지지 않아, 전동기의 효율이 떨어지는 문제점이 있다.In addition, since the central portion of the stator core is not smoothly cooled, there is a problem in that the efficiency of the electric motor is lowered.
본 발명은 종래의 문제점을 해결하기 위해 창출한 것으로서, 전동기의 출력 증대를 위해 스테이터코어의 적층길이가 증가 시 모터 하우징의 크기 및 오일분사홀의 위치를 재설계하지 않고도 스테이터코일에 오일을 분사하여 스테이터코일 등을 냉각할 수 있는 전동기를 제공하는데 그 목적이 있다.The present invention was created to solve the conventional problems, and the stator is sprayed with oil into the stator coil without redesigning the size of the motor housing and the position of the oil injection hole when the stacking length of the stator core increases to increase the output of the motor. An object of the present invention is to provide an electric motor capable of cooling a coil or the like.
또한, 본 발명은 스테이터코어가 압입되는 모터 하우징의 압입면을 원주방향으로 이격 배치되게 복수개로 형성하고, 원주방향으로 인접한 압입면 사이에 오일분사영역부를 형성하여 오일을 오일분사영역부에 분사함으로써, 스테이터코어 및 스테이터코일의 중앙부를 냉각할 수 있는 전동기를 제공하는데 다른 목적이 있다.In addition, the present invention is formed by forming a plurality of press-fit surfaces of the motor housing to which the stator core is press-fitted to be spaced apart in the circumferential direction, and forming an oil jetting zone portion between adjacent press-fit surfaces in the circumferential direction, thereby spraying oil to the oil jet zone. Another object is to provide an electric motor capable of cooling the central portion of the stator core and the stator coil.
상술한 목적을 달성하기 위해, 본 발명에 따른 전동기는 내부에 수용공간을 구비하는 모터 하우징; 상기 모터 하우징의 내부에 수용되고, 스테이터 코어와 상기 스테이터 코어에 권선되는 코일을 구비하는 스테이터; 상기 스테이터 코어의 내부에 회전축을 중심으로 회전 가능하게 장착되는 로터; 상기 모터 하우징의 양단부를 덮는 복수의 엔드커버; 상기 복수의 엔드커버 각각의 내부에 형성되는 오일유로; 및 상기 복수의 엔드커버 각각의 내측면에 상기 오일유로와 연통되게 형성되어, 상기 수용공간으로 오일을 분사하는 복수의 노즐을 포함할 수 있다.In order to achieve the above object, the electric motor according to the present invention includes a motor housing having an accommodation space therein; A stator accommodated inside the motor housing and having a stator core and a coil wound around the stator core; A rotor rotatably mounted inside the stator core about an axis of rotation; A plurality of end covers covering both ends of the motor housing; An oil passage formed inside each of the plurality of end covers; And a plurality of nozzles which are formed to communicate with the oil passage on each inner surface of each of the plurality of end covers, so as to spray oil into the accommodation space.
본 발명과 관련된 일 예에 따르면, 상기 복수의 노즐은, 상기 코일을 향해 축방향으로 연장되어, 상기 오일을 상기 코일로 분사하는 제1노즐을 포함할 수 있다.According to an example related to the present invention, the plurality of nozzles may include a first nozzle that extends axially toward the coil and sprays the oil into the coil.
본 발명과 관련된 일 예에 따르면, 상기 복수의 노즐은, 상기 로터를 향해 경사지게 연장되어, 상기 오일을 상기 로터로 분사하는 제2노즐을 포함할 수 있다.According to an example related to the present invention, the plurality of nozzles may include a second nozzle extending obliquely toward the rotor to spray the oil into the rotor.
본 발명과 관련된 일 예에 따르면, 상기 모터 하우징은, 원주방향으로 이격 배치되고, 상기 스테이터 코어가 압입되는 복수의 압입면; 및 상기 원주방향으로 인접하는 상기 복수의 압입면 사이에 오목하게 형성되는 복수의 오일분사영역부를 구비할 수 있다.According to an example related to the present invention, the motor housing is arranged spaced apart in the circumferential direction, the stator core is press-fitting a plurality of pressing surfaces; And a plurality of oil injection region portions concavely formed between the plurality of press-in faces adjacent in the circumferential direction.
본 발명과 관련된 일 예에 따르면, 상기 복수의 노즐은, 상기 복수의 오일분사영역부를 향해 축방향으로 연장되어, 상기 오일을 상기 복수의 오일분사영역부에 분사하는 제3노즐을 포함할 수 있다.According to an example related to the present invention, the plurality of nozzles may include a third nozzle that extends axially toward the plurality of oil injection region portions and sprays the oil to the plurality of oil injection region portions. .
본 발명과 관련된 일 예에 따르면, 상기 모터 하우징은, 상기 복수의 오일분사영역부 각각에 상기 압입면과 동일한 원주면 상으로 돌출 형성되어 상기 스테이터 코어와 접촉되는 복수의 돌출리브를 더 포함할 수 있다.According to an example related to the present invention, the motor housing may further include a plurality of protruding ribs protruding on the same circumferential surface as the press-fitting surface in each of the plurality of oil injection area portions, and contacting the stator core. have.
본 발명과 관련된 일 예에 따르면, 상기 엔드커버는, 커버바디; 상기 커버바디의 내부에 원주방향을 따라 연장되어, 상기 오일유로를 형성하는 오일분배부; 및 상기 오일분배부를 덮도록 상기 커버바디의 외측면에 장착되는 외측커버부를 포함하고, 상기 복수의 노즐은, 일측은 상기 오일분배부와 연통되고, 타측은 상기 커버바디에서 상기 수용공간으로 돌출될 수 있다.According to an example related to the present invention, the end cover, the cover body; An oil distribution part extending in a circumferential direction inside the cover body to form the oil passage; And an outer cover part mounted on an outer surface of the cover body to cover the oil distribution part, the plurality of nozzles, one side communicating with the oil distribution part, and the other side protruding from the cover body to the receiving space. You can.
본 발명과 관련된 일 예에 따르면, 상기 모터 하우징의 내부에 형성되는 오일유로를 더 포함할 수 있다.According to an example related to the present invention, it may further include an oil passage formed inside the motor housing.
본 발명과 관련된 일 예에 따르면, 상기 모터 하우징의 오일유로와 상기 엔드커버의 오일유로는 서로 연통되게 연결될 수 있다.According to an example related to the present invention, the oil passage of the motor housing and the oil passage of the end cover may be connected to each other in communication.
본 발명과 관련된 일 예에 따르면, 상기 복수의 엔드커버 각각의 상부에 상기 엔드커버의 오일유로와 연통되게 형성되는 오일유입구; 및 상기 모터 하우징의 하부에 상기 수용공간과 연통되게 형성되는 오일유출구를 포함할 수 있다.According to an example related to the present invention, an oil inlet formed in communication with the oil passage of the end cover on each of the plurality of end covers; And an oil outlet formed in communication with the accommodation space under the motor housing.
본 발명과 관련된 일 예에 따르면, 상기 복수의 노즐은 360도 원주를 따라 이격 배치될 수 있다.According to an example related to the present invention, the plurality of nozzles may be spaced apart along a 360 degree circumference.
본 발명과 관련된 일 예에 따르면, 상기 모터 하우징은, 상기 스테이터 코어의 적층길이가 축방향으로 확장 가능하게 연장되는 연장부를 더 포함할 수 있다.According to an example related to the present invention, the motor housing may further include an extension portion in which the stacking length of the stator core extends axially.
본 발명과 관련된 일 예에 따르면, 상기 스테이터 코어의 적층길이에 따라 상기 복수의 노즐 각각에 결합되어, 상기 노즐의 길이를 연장하는 복수의 노즐연장부를 더 포함할 수 있다.According to an example related to the present invention, it is coupled to each of the plurality of nozzles according to the stacking length of the stator core, and may further include a plurality of nozzle extensions extending the length of the nozzle.
본 발명과 관련된 일 예에 따르면, 상기 엔드커버의 내측면에서 축방향으로 돌출되는 베어링 수용부; 및 상기 스테이터 코어의 적층길이에 따라 상기 베어링 수용부에 결합되어, 상기 베어링 수용부의 길이를 축방향으로 더 연장하는 베어링 연장부를 더 포함할 수 있다.According to an example related to the present invention, the bearing receiving portion protruding in the axial direction from the inner surface of the end cover; And a bearing extension part coupled to the bearing accommodation part according to the stacking length of the stator core, and further extending the length of the bearing accommodation part in the axial direction.
본 발명과 관련된 일 예에 따르면, 상기 베어링 수용부의 내부에 형성되는 베어링 오일유로; 상기 베어링 연장부의 내부에 형성되는 베어링 연장 오일유로; 및 상기 베어링 오일유로 또는 상기 베어링 연장 오일유로와 연통되게 연장되고, 상기 베어링을 향해 오일을 분사하는 복수의 베어링 노즐을 더 포함할 수 있다.According to an example related to the present invention, the bearing oil passage formed inside the bearing receiving portion; A bearing extension oil passage formed inside the bearing extension; And a plurality of bearing nozzles extending in communication with the bearing oil passage or the bearing extension oil passage, and spraying oil toward the bearing.
본 발명과 관련된 일 예에 따르면, 상기 엔드커버는, 상기 오일유로의 내부에 원주방향으로 이격 배치되어, 상기 오일유로를 따라 흐르는 오일의 흐름을 방해하는 복수의 오일흐름 방해벽을 더 포함하고, 상기 복수의 오일흐름 방해벽 각각은 원주방향으로 인접한 복수의 노즐 사이에 상기 오일유로의 폭방향으로 연장될 수 있다.According to an example related to the present invention, the end cover is further spaced in the circumferential direction inside the oil passage, and further includes a plurality of oil flow barriers to prevent the flow of oil flowing along the oil passage, Each of the plurality of oil flow barriers may extend in a width direction of the oil passage between a plurality of nozzles adjacent in the circumferential direction.
본 발명과 관련된 일 예에 따르면, 상기 엔드커버는, 상기 오일유로의 내부에 똬리 형태로 복수 회 회전하며 연장되는 오일가이드벽을 더 포함하고, 상기 오일은 상기 오일가이드벽을 따라 상기 오일유로의 외측에서 내측방향으로 복수회로 회전 이동하고, 상기 복수의 노즐은 반경방향으로 인접한 복수의 오일가이드벽 사이에 배치되고 원주방향으로 이격될 수 있다.According to an example related to the present invention, the end cover further includes an oil guide wall that extends and rotates a plurality of times in the form of a coil in the interior of the oil passage, and the oil flows along the oil guide wall to the oil passage. A plurality of rotational movements are performed from the outside to the inside, and the plurality of nozzles may be disposed between a plurality of oil guide walls adjacent in the radial direction and spaced apart in the circumferential direction.
본 발명과 관련된 일 예에 따르면, 상기 회전축에 체결되어, 상기 로터의 축방향 이동을 제한하는 체결부재를 더 포함하고, 상기 회전축은, 상기 로터의 적층길이에 따라 축방향으로 서로 이격 배치되며, 상기 체결부재가 체결되는 복수의 체결부를 더 포함할 수 있다.According to an example related to the present invention, it is fastened to the rotating shaft, further comprising a fastening member for limiting the axial movement of the rotor, the rotating shaft is spaced from each other in the axial direction according to the stacking length of the rotor, The fastening member may further include a plurality of fastening parts.
본 발명과 관련된 일 예에 따르면, 상기 체결부재는 나사 체결되는 락 너트 및 끼움 결합되는 키(key) 중 적어도 하나이상을 포함할 수 있다.According to an example related to the present invention, the fastening member may include at least one of a lock nut to be screwed and a key to be fitted.
본 발명과 관련된 일 예에 따르면, 상기 체결부는 나사 체결을 위한 나사부 및 키의 끼움 결합을 위한 키홈 중 적어도 하나이상을 포함할 수 있다.According to an example related to the present invention, the fastening part may include at least one of a screw part for screw fastening and a key groove for fitting the key.
본 발명에 따른 전동기의 효과에 대해 설명하면 다음과 같다.When explaining the effect of the electric motor according to the present invention are as follows.
첫째, 복수의 엔드커버 각각은 내부에 오일유로를 형성하고, 엔드커버의 내측면에 복수의 노즐을 구비하고, 복수의 노즐은 스테이터 코어 및 코일을 향해 축방향으로 연장되는 제1노즐과 로터를 향해 경사지게 연장되는 제2노즐을 포함하여, 전동기의 출력 증대를 위해 스테이터 코어의 적층길이가 가변되어도 오일의 분사를 위한 노즐을 재설계할 필요가 없고, 오일을 스테이터 코어, 코일 및 로터에 분사하여 전동기를 냉각함으로써 전동기의 효율을 높일 수 있다.First, each of the plurality of end covers forms an oil passage therein, and includes a plurality of nozzles on the inner surface of the end cover, and the plurality of nozzles include a first nozzle and a rotor extending axially toward the stator core and coil. Including the second nozzle extending obliquely toward the motor, even if the stacking length of the stator core is varied to increase the output of the electric motor, there is no need to redesign the nozzle for spraying oil, and spraying oil to the stator core, coil and rotor The efficiency of the electric motor can be increased by cooling the electric motor.
둘째, 복수의 노즐이 360도 전체 원주를 따라 이격 배치됨으로, 스테이터 코어 또는 코일의 양단부 각각의 전체 원주면을 따라 균일하게 냉각할 수 있다.Second, since a plurality of nozzles are spaced along the entire circumference of 360 degrees, it is possible to uniformly cool along the entire circumferential surface of each of both ends of the stator core or coil.
셋째, 모터 하우징의 내주면에 스테이터 코어가 압입되는 복수의 압입면을 형성하고, 원주방향으로 인접하는 두 압입면 사이에 오일분사영역부를 오목하게 형성하여, 복수의 오일분사영역부에 오일이 침투됨으로써, 스테이터 코어의 전단부와 후단부는 물론, 스테이터 코어의 중앙부까지 스테이터 코어의 원주면 전체를 원활하게 냉각할 수 있다.Third, by forming a plurality of press-fitting surfaces in which the stator core is press-fitted on the inner circumferential surface of the motor housing, and concavely forming the oil-spraying area between two adjacent press-fitting surfaces in the circumferential direction, the oil penetrates into the plurality of oil-spraying areas , It is possible to smoothly cool the entire circumferential surface of the stator core, as well as the front and rear ends of the stator core, as well as the center of the stator core.
넷째, 모터 하우징의 내주면과 스테이터 코어의 외주면 사이의 오일분사영역부는 틈새가 좁아서 노즐과 오일분사영역부 사이의 거리가 멀어질 경우에 노즐에서 분사되는 오일이 오일분사영역부에 도달하기 어려우나, 전동기의 출력 증대로 스테이터 코어의 적층길이가 증가함에 따라, 노즐과 분사대상 간의 간격이 멀어질 경우에 노즐에 노즐연장부를 결합하여 노즐의 길이를 연장함으로써, 노즐연장부는 노즐의 오일 직진성을 안내하여 분사하고자 하는 곳에 정확히 분사할 수 있어서, 오일에 의한 냉각이 효율적으로 이루어질 수 있다.Fourth, the oil injection region between the inner circumferential surface of the motor housing and the outer circumferential surface of the stator core has a narrow gap, so when the distance between the nozzle and the oil injection region increases, it is difficult for the oil sprayed from the nozzle to reach the oil injection region, but the motor As the stacking length of the stator core increases with the increase of the output of the nozzle, the nozzle extension part extends the length of the nozzle by combining the nozzle extension part with the nozzle when the distance between the nozzle and the spraying object increases. Since it can be sprayed exactly where you want, cooling by oil can be done efficiently.
다섯째, 복수의 돌출리브는 오일분사영역부에 스테이터 코어와 접촉 가능하게 돌출됨으로써, 스테이터 코어와 모터 하우징 간의 열교환 면적을 증가시킬 수 있다. 또한, 복수의 돌출리브는 오일분사영역부를 따라 흐르는 오일의 이동면적을 줄임으로 오일의 유속을 증가시킬 수 있다. 뿐만 아니라, 복수의 돌출리브는 오일분사영역부를 따라 흐르는 오일흐름의 직진성을 안내할 수 있다. 아울러, 복수의 돌출리브는 모터 하우징의 내주면에서 반경방향으로 돌출되어, 모터 하우징의 강도를 보강할 수 있다.Fifth, the plurality of protruding ribs protrude in contact with the stator core in the oil injection region, thereby increasing the heat exchange area between the stator core and the motor housing. In addition, the plurality of protruding ribs can increase the flow rate of the oil by reducing the moving area of the oil flowing along the oil injection region. In addition, the plurality of protruding ribs can guide the straightness of the oil flow flowing along the oil injection region. In addition, the plurality of protruding ribs protrude in the radial direction from the inner circumferential surface of the motor housing, thereby enhancing the strength of the motor housing.
여섯째, 베어링 연장부는 엔드커버의 베어링 수용부에 결하되어, 로터의 적층길이에 따라 베어링의 위치를 가변시킬 수 있어서, 예를 들어 로터의 적층길이가 최소일 때 베어링의 위치가 로터의 무게중심을 향해 가까워지는 방향으로 이동시킴으로 로터의 무게중심과 베어링 사이의 거리 변경으로 인해 로터의 진동 특성이 불안정해지는 것을 방지할 수 있다.Sixth, the bearing extension part is attached to the bearing accommodating part of the end cover, so that the position of the bearing can be varied according to the stacking length of the rotor, for example, when the stacking length of the rotor is minimal, the position of the bearing increases the center of gravity of the rotor. By moving in the direction toward the direction, it is possible to prevent the vibration characteristics of the rotor from becoming unstable due to a change in the distance between the center of gravity of the rotor and the bearing.
일곱째, 베어링 노즐 및 베어링 연장 노즐은 로터의 적층길이에 따라 베어링의 위치가 변경되어도, 베어링 연장부에 형성되는 베어링 연장 노즐의 위치를 조절함으로, 베어링에 오일을 분사하여 베어링을 냉각할 수 있다.Seventh, the bearing nozzle and the bearing extension nozzle can cool the bearing by spraying oil on the bearing by adjusting the position of the bearing extension nozzle formed on the bearing extension, even if the position of the bearing is changed according to the stacking length of the rotor.
여덟째, 엔드커버의 오일분배부 내부에 복수의 오일 흐름 방해벽을 구비함으로써, 오일 흐름 방해벽은 오일유로를 따라 원주방향으로 흐르는 오일의 흐름을 방해함으로써, 복수의 노즐이 엔드커버의 상부에 위치하든 엔드커버의 하부에 위치하든 상관없이 복수의 노즐에 오일을 균등하게 분배할 수 있다.Eighth, by providing a plurality of oil flow barriers inside the oil distribution portion of the end cover, the oil flow barriers interfere with the flow of oil flowing in the circumferential direction along the oil passage, so that a plurality of nozzles are located on the top of the end cover The oil can be evenly distributed to multiple nozzles regardless of whether it is located at the bottom of the end cover.
아홉째, 엔드커버의 내부에 똬리 형태의 오일가이드벽을 구비하고, 오일가이드벽은 오일유입구를 통해 유입된 오일을 엔드커버의 최외곽 상부에서 반경방향 내측을 향해 원주방향으로 회전 이동시킴으로써, 복수의 노즐이 엔드커버의 상부에 위치하든 엔드커버의 하부에 위치하든 복수의 노즐에 오일을 균일하게 분배할 수 있다.Ninth, the inside of the end cover is provided with an oil guide wall in the form of a coil, and the oil guide wall is rotated in the circumferential direction from the uppermost outermost part of the end cover toward the radially inner side by moving the oil introduced through the oil inlet. It is possible to uniformly distribute the oil to a plurality of nozzles, whether the nozzle is located at the top of the end cover or the bottom of the end cover.
열번째, 로터코어의 적층길이가 증가할 때 회전축 연장부를 구비하여, 로터코어의 타단부에 밀착되게 키를 키홈에 끼움 결합하거나, 회전축 연장부에 형성된 체결부에 락 너트를 체결함으로, 로터코어가 축방향으로 이동하는 것을 제한할 수 있다.Tenth, when the stacking length of the rotor core increases, the rotary core extension part is provided to fit the key into the keyway in close contact with the other end of the rotor core, or by fastening the lock nut to the fastening part formed in the rotation axis extension part, the rotor core Can limit the axial movement.
도 1은 본 발명의 제1실시예에 따른 전동기의 커버형 오일분사구조를 보여주는 개념도이다.1 is a conceptual diagram showing a cover-type oil injection structure of an electric motor according to a first embodiment of the present invention.
도 2는 도 1에서 전동기의 일 구현예를 보여주는 개념도이다.2 is a conceptual diagram showing an embodiment of the electric motor in FIG. 1.
도 3은 도 2의 분해도이다.3 is an exploded view of FIG. 2.
도 4는 도 2에서 IV-IV를 따라 취한 단면도이다.4 is a cross-sectional view taken along IV-IV in FIG. 2.
도 5는 도 4에서 V부분을 확대하여 로터를 향해 오일을 분사하는 노즐을 보여주는 개념도이다.5 is a conceptual view showing a nozzle for spraying oil toward the rotor by enlarging the V part in FIG. 4.
도 6은 코일을 향해 오일을 분사하는 노즐을 보여주는 개념도이다.6 is a conceptual view showing a nozzle spraying oil toward a coil.
도 7은 본 발명의 제2실시예에 따른 전동기의 커버형 오일분사구조를 보여주는 개념도이다.7 is a conceptual view showing a cover-type oil injection structure of an electric motor according to a second embodiment of the present invention.
도 8은 도 7에서 전동기의 다른 구현예를 보여주는 개념도이다.8 is a conceptual diagram showing another embodiment of the electric motor in FIG. 7.
도 9는 도 8에서 엔드커버의 외측커버가 탈거된 후, 엔드커버 내부의 노즐을 보여주는 개념도이다.9 is a conceptual view illustrating a nozzle inside the end cover after the outer cover of the end cover is removed in FIG. 8.
도 10은 도 9에서 X-X를 따라 단면도로서, 스테이터 및 로터의 적층길이가 증가된 전동기를 보여주는 개념도이다.FIG. 10 is a cross-sectional view along X-X in FIG. 9, and is a conceptual view showing an electric motor having an increased stacking length of a stator and a rotor.
도 11은 도 10에서 스테이터 및 로터의 적층길이가 감소된 전동기를 보여주는 개념도이다.11 is a conceptual diagram showing an electric motor having a reduced stacking length of the stator and the rotor in FIG. 10.
도 12는 도 10에서 XII-XII를 따라 취한 단면도이다.12 is a cross-sectional view taken along XII-XII in FIG. 10.
도 13은 도 11에서 엔드커버를 제거한 후 모터 하우징을 보여주는 개념도이다.13 is a conceptual view showing the motor housing after removing the end cover in FIG.
도 14는 도 13에서 XIV-XIV를 따라 취한 단면도이다.14 is a cross-sectional view taken along XIV-XIV in FIG. 13.
도 15는 도 14에서 스테이터 코어를 제거한 후 모터 하우징을 보여주는 개념도이다.15 is a conceptual view illustrating a motor housing after removing the stator core from FIG. 14.
도 16은 도 10에서 엔드커버의 내측면에 돌출 형성된 복수의 노즐을 보여주는 개념도이다.16 is a conceptual view showing a plurality of nozzles protruding from the inner surface of the end cover in FIG. 10.
도 17은 도 14에서 오일분사영역부에 복수의 돌출리브가 형성된 모습을 보여주는 개념도이다.FIG. 17 is a conceptual view showing a state in which a plurality of protruding ribs are formed in an oil injection region in FIG. 14.
도 18은 도 17에서 스테이터 코어가 삭제된 후 복수의 돌출리브를 보여주는 개념도이다.18 is a conceptual view showing a plurality of protruding ribs after the stator core is deleted in FIG. 17.
도 19는 본 발명에 따른 로터의 적층길이가 최대일 때 무게중심을 보여주는 개념도이다.19 is a conceptual diagram showing the center of gravity when the stacking length of the rotor according to the present invention is maximum.
도 20은 로터의 적층길이가 최소일 때 무게중심이 변하는 모습을 보여주는 개념도이다.20 is a conceptual view showing a state in which the center of gravity changes when the stacking length of the rotor is minimal.
도 21은 도 19에서 복수의 노즐을 통해 오일이 분사되는 모습을 보여주는 개념도이다.21 is a conceptual view showing a state in which oil is injected through a plurality of nozzles in FIG. 19.
도 22는 도 20에서 복수의 노즐을 통해 오일이 분사되는 모습을 보여주는 개념도이다.22 is a conceptual diagram showing a state in which oil is injected through a plurality of nozzles in FIG. 20.
도 23은 본 발명의 일 실시예에 따른 엔드커버의 내부에 복수의 오일 흐름 방해벽이 형성된 모습을 보여주는 개념도이다.23 is a conceptual view showing a state in which a plurality of oil flow barriers are formed inside the end cover according to an embodiment of the present invention.
도 24는 본 발명의 다른 실시예에 따른 엔드커버의 내부에 오일가이드벽이 형성된 모습을 보여주는 개념도이다.24 is a conceptual view showing a state in which an oil guide wall is formed inside the end cover according to another embodiment of the present invention.
도 25는 본 발명의 일실시예에 따른 로터코어의 적층길이에 따라 락 너트의 체결위치가 달라지는 모습을 보여주는 개념도이다.25 is a conceptual view showing a state in which the fastening position of the lock nut is changed according to the stacking length of the rotor core according to an embodiment of the present invention.
도 26은 본 발명의 다른 일실시예에 따른 로터코어의 적층길이에 따라 키가 키홈에 체결되는 모습을 보여주는 개념도이다.26 is a conceptual view showing a state in which the key is fastened to the keyway according to the stacking length of the rotor core according to another embodiment of the present invention.
도 27 내지 도 29는 본 발명의 또 다른 실시예에 따른 로터코어의 적층길이에 따라 서로 다른 위치에 형성된 키홈에 키가 결합된 모습을 보여주는 개념도이다.27 to 29 are conceptual views illustrating a state in which keys are coupled to key grooves formed at different positions according to the stacking length of the rotor core according to another embodiment of the present invention.
이하, 첨부된 도면을 참조하여 본 명세서에 개시된 실시 예를 상세히 설명하되, 도면 부호에 관계없이 동일하거나 유사한 구성요소는 동일한 참조 번호를 부여하고 이에 대한 중복되는 설명은 생략하기로 한다. 이하의 설명에서 사용되는 구성요소에 대한 접미사 "모듈" 및 "부"는 명세서 작성의 용이함만이 고려되어 부여되거나 혼용되는 것으로서, 그 자체로 서로 구별되는 의미 또는 역할을 갖는 것은 아니다. 또한, 본 명세서에 개시된 실시 예를 설명함에 있어서 관련된 공지 기술에 대한 구체적인 설명이 본 명세서에 개시된 실시 예의 요지를 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다. 또한, 첨부된 도면은 본 명세서에 개시된 실시 예를 쉽게 이해할 수 있도록 하기 위한 것일 뿐, 첨부된 도면에 의해 본 명세서에 개시된 기술적 사상이 제한되지 않으며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for the components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves. In addition, in describing the embodiments disclosed in this specification, detailed descriptions of related well-known technologies are omitted when it is determined that they may obscure the gist of the embodiments disclosed herein. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed herein, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.
제1, 제2 등과 같이 서수를 포함하는 용어는 다양한 구성요소들을 설명하는데 사용될 수 있지만, 상기 구성요소들은 상기 용어들에 의해 한정되지는 않는다. 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다.Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.
어떤 구성요소가 다른 구성요소에 "연결되어" 있다거나 "접속되어" 있다고 언급된 때에는, 그 다른 구성요소에 직접적으로 연결되어 있거나 또는 접속되어 있을 수도 있지만, 중간에 다른 구성요소가 존재할 수도 있다고 이해되어야 할 것이다. 반면에, 어떤 구성요소가 다른 구성요소에 "직접 연결되어" 있다거나 "직접 접속되어" 있다고 언급된 때에는, 중간에 다른 구성요소가 존재하지 않는 것으로 이해되어야 할 것이다.When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.
단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. Singular expressions include plural expressions unless the context clearly indicates otherwise.
본 출원에서, "포함한다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.In this application, the terms "comprises" or "have" are intended to indicate the presence of features, numbers, steps, operations, components, parts or combinations thereof described in the specification, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.
도 1은 본 발명의 제1실시예에 따른 전동기의 커버형 오일분사구조를 보여주는 개념도이고, 도 2는 도 1에서 전동기의 일 구현예를 보여주는 개념도이고, 도 3은 도 2의 분해도이고, 도 4는 도 2에서 IV-IV를 따라 취한 단면도이고, 도 5는 도 4에서 V부분을 확대하여 로터(120)를 향해 오일을 분사하는 노즐(127)을 보여주는 개념도이고, 도 6은 코일(112)을 향해 오일을 분사하는 노즐(127)을 보여주는 개념도이다.1 is a conceptual diagram showing a cover-type oil injection structure of an electric motor according to a first embodiment of the present invention, FIG. 2 is a conceptual diagram showing an embodiment of the electric motor in FIG. 1, and FIG. 3 is an exploded view of FIG. 2, 4 is a cross-sectional view taken along IV-IV in FIG. 2, and FIG. 5 is a conceptual view showing a nozzle 127 injecting oil toward the rotor 120 by enlarging the V part in FIG. 4, and FIG. 6 is a coil 112 ) Is a conceptual diagram showing a nozzle 127 for spraying oil.
본 발명의 전동기는 모터 하우징(100), 스테이터(110), 로터(120) 및 엔드커버(122)를 포함하여 구성될 수 있다.The electric motor of the present invention may include a motor housing 100, a stator 110, a rotor 120, and an end cover 122.
모터 하우징(100)은 원통형으로 형성될 수 있다. 모터 하우징(100)은 전동기의 외관을 형성할 수 있다. 모터 하우징(100)은 IPGM의 인버터를 수용하는 인버터 하우징과 일체형으로 형성될 수 있다.The motor housing 100 may be formed in a cylindrical shape. The motor housing 100 may form the appearance of the electric motor. The motor housing 100 may be integrally formed with an inverter housing that accommodates an inverter of IPGM.
모터 하우징(100)의 내부에 수용공간이 형성되고, 모터 하우징(100)의 길이방향으로 양단부가 개방되어, 스테이터(110) 및 로터(120)가 수용공간에 수용될 수 있다.An accommodating space is formed inside the motor housing 100, and both ends are opened in the longitudinal direction of the motor housing 100, so that the stator 110 and the rotor 120 can be accommodated in the accommodating space.
스테이터(110)는 스테이터 코어(111) 및 코일(112)로 구성될 수 있다. 스테이터 코어(111)는 복수의 전기강판을 축방향으로 적층하여 원통형으로 구성될 수 있다. 스테이터 코어(111)의 내측에 복수의 슬롯(1110; Slot)과 복수의 티스(1111; teeth)가 원주방향으로 교대로 이격 배치될 수 있다.The stator 110 may include a stator core 111 and a coil 112. The stator core 111 may be formed in a cylindrical shape by stacking a plurality of electrical steel plates in the axial direction. A plurality of slots 1110 (Slot) and a plurality of teeth (1111; teeth) may be alternately spaced in the circumferential direction inside the stator core 111.
코일(112)은 슬롯(1110)에 삽입되며 스테이터 코어(111)의 내측에 권선될 수 있다.The coil 112 is inserted into the slot 1110 and can be wound inside the stator core 111.
코일(112)은 복수의 도체를 연결하여 구성될 수 있다. 복수의 도체 각각은 헤어핀 타입으로 형성될 수 있다. 코일(112)은 3상으로 구성되어, 3상 교류전원이 코일(112)에 인가될 수 있다.The coil 112 may be configured by connecting a plurality of conductors. Each of the plurality of conductors may be formed in a hairpin type. The coil 112 is composed of three phases, and three-phase AC power may be applied to the coil 112.
3상 코일(112) 각각은 전원 공급용 버스바에 의해 연결될 수 있다. 3상 코일(112) 각각의 단부는 중성선 버스바에 의해 연결될 수 있다.Each of the three-phase coils 112 may be connected by a power supply busbar. Each end of the three-phase coil 112 may be connected by a neutral busbar.
로터(120)는 스테이터(110)의 내부에 수용되게 배치될 수 있다. 스테이터 코어(111)의 내부에 로터수용공이 축방향으로 관통 형성될 수 있다. The rotor 120 may be arranged to be accommodated inside the stator 110. A rotor accommodating hole may be formed through the axial direction inside the stator core 111.
로터(120)는 로터수용공에 수용되고, 스테이터(110)와 로터(120) 사이에 에어갭(air gap)을 두고 스테이터(110)에 대하여 회전 가능하게 회전축(133)에 장착될 수 있다.The rotor 120 may be accommodated in a rotor receiving hole, and an air gap may be disposed between the stator 110 and the rotor 120 to be rotatable with respect to the stator 110 to be mounted on the rotating shaft 133.
로터(120)는 로터코어(121)와 복수의 영구자석으로 구성될 수 있다. 로터코어(121)는 복수의 전기강판을 적층하여 원통 형태로 구성될 수 있다. 로터코어(121)의 중앙부에 회전축 수용공이 축방향으로 관통 형성되어, 회전축(133)이 회전축 수용공에 삽입 결합될 수 있다.The rotor 120 may be composed of a rotor core 121 and a plurality of permanent magnets. The rotor core 121 may be configured in a cylindrical shape by stacking a plurality of electrical steel sheets. A rotating shaft receiving hole is formed through the axial direction in the central portion of the rotor core 121, and the rotating shaft 133 may be inserted and coupled to the rotating shaft receiving hole.
영구자석은 로터코어(121)의 내부에 장착될 수 있다. 영구자석은 코일(112) 주위에 발생하는 자기장과 상호 작용하여 회전자계를 형성함으로, 로터(120)를 회전시킬 수 있다.The permanent magnet may be mounted inside the rotor core 121. The permanent magnet can rotate the rotor 120 by forming a rotating magnetic field by interacting with a magnetic field generated around the coil 112.
전원선 연결부가 모터 하우징(100)의 일단부에 설치되고, 전원선 연결부의 내부에 전원공급용 버스바가 수용될 수 있다.The power line connection part is installed at one end of the motor housing 100, and a bus bar for supplying power may be accommodated inside the power line connection part.
복수의 엔드커버(122)는 모터 하우징(100)의 양단부를 덮도록 모터 하우징(100)의 양단에 각각 장착될 수 있다.The plurality of end covers 122 may be mounted on both ends of the motor housing 100 so as to cover both ends of the motor housing 100.
엔드커버(122)의 일측에 중성선 커넥터가 설치되고, 중성선 커넥터의 내부에 중성선 버스바가 수용될 수 있다.A neutral wire connector is installed on one side of the end cover 122, and a neutral wire bus bar may be accommodated inside the neutral wire connector.
모터 하우징(100)의 내부에 오일유로(101)가 형성될 수 있다. 모터 하우징(100)의 상부에 오일유입구(102)가 형성되어, 오일유입구(102)를 통해 모터 하우징(100)의 오일유로(101)로 오일이 유입될 수 있다.The oil passage 101 may be formed inside the motor housing 100. The oil inlet 102 is formed on the upper part of the motor housing 100, and oil may be introduced into the oil passage 101 of the motor housing 100 through the oil inlet 102.
모터 하우징(100)의 오일유로(101)에 유입된 오일은 스테이터 코어(111)와 열교환함으로, 스테이터 코어(111)를 냉각할 수 있다.The oil flowing into the oil passage 101 of the motor housing 100 may heat the stator core 111 to cool the stator core 111.
복수의 엔드커버(122) 각각의 내부에 오일유로(123)가 형성될 수 있다. 복수의 엔드커버(122) 각각의 외측면에 오일유입구(124)가 구비될 수 있다. 오일유입구(124)는 엔드커버(122)의 오일유로(123)와 연통되게 형성되어, 오일이 오일유입구(124)를 통해 엔드커버(122)의 오일유로(123)로 유입될 수 있다.An oil passage 123 may be formed in each of the plurality of end covers 122. Oil inlets 124 may be provided on the outer surfaces of each of the plurality of end covers 122. The oil inlet 124 is formed to communicate with the oil passage 123 of the end cover 122, so that the oil may flow into the oil passage 123 of the end cover 122 through the oil inlet 124.
엔드커버(122)의 오일유로(123)와 모터 하우징(100)의 오일유로(101)는 서로 연통되게 연결될 수 있다.The oil passage 123 of the end cover 122 and the oil passage 101 of the motor housing 100 may be connected in communication with each other.
엔드커버(122)의 오일유로(123)에 유입된 오일은 엔드커버(122)를 냉각할 수 있다. 엔드커버(122)는 베어링 수용부(125)를 구비할 수 있다. 베어링 수용부(125)의 내부에 베어링(126)이 수용되게 설치될 수 있다. The oil introduced into the oil passage 123 of the end cover 122 may cool the end cover 122. The end cover 122 may include a bearing receiving portion 125. The bearing 126 may be installed inside the bearing accommodation portion 125.
복수의 엔드커버(122) 각각에 설치된 베어링(126)은 회전축(133)의 양단부를 회전 가능하게 지지할 수 있다.The bearing 126 installed in each of the plurality of end covers 122 may rotatably support both ends of the rotating shaft 133.
엔드커버(122)의 오일은 베어링(126)과 열교환을 함으로, 베어링(126)을 냉각할 수 있다.The oil of the end cover 122 exchanges heat with the bearing 126 to cool the bearing 126.
복수의 엔드커버(122) 각각의 내측면에 복수의 노즐(127)이 형성되어, 오일이 복수의 노즐(127)을 통해 모터 하우징(100)의 수용공간에 분사될 수 있다.A plurality of nozzles 127 are formed on the inner surfaces of each of the plurality of end covers 122, so that oil may be injected into the receiving space of the motor housing 100 through the plurality of nozzles 127.
복수의 노즐(127)은 일측이 오일유로(123)와 연통되고, 타측이 모터 하우징(100)의 수용공간에 연통되게 연결될 수 있다.The plurality of nozzles 127 may be connected to one side in communication with the oil passage 123 and the other side in communication with the receiving space of the motor housing 100.
복수의 노즐(127)은 엔드커버(122)의 내측에 축방향(수평방향 또는 회전축(133)과 평행한 방향)으로 또는 경사지게 연장되어, 오일을 스테이터(110) 또는 로터(120)를 향해 축방향으로 분사할 수 있다.The plurality of nozzles 127 are extended in an axial direction (horizontal direction or a direction parallel to the rotation axis 133) or inclined inside the end cover 122, so that the oil is axially toward the stator 110 or the rotor 120. Can be sprayed in any direction.
복수의 노즐(127)은 제1노즐(128) 내지 제2노즐(129)을 포함할 수 있다.The plurality of nozzles 127 may include first nozzles 128 to second nozzles 129.
제1노즐(128)은 엔드커버(122)의 내측에 축방향으로 연장되게 형성되어, 오일을 코일(112)로 분사할 수 있다(도 6 참조).The first nozzle 128 is formed to extend in the axial direction inside the end cover 122, it is possible to spray the oil to the coil 112 (see Fig. 6).
제2노즐(129)은 엔드커버(122)의 내측에 축방향에 대하여 기설정된 각도로 경사지게 연장되어, 오일을 로터(120)를 향해 분사할 수 있다(도 5 참조).The second nozzle 129 extends obliquely at a predetermined angle with respect to the axial direction inside the end cover 122 to spray oil toward the rotor 120 (see FIG. 5 ).
복수의 노즐(127)은 360도 원주를 따라 이격 배치되어, 코일(112)의 전체 원주면에 오일을 직접 분사할 수 있다.The plurality of nozzles 127 are spaced apart along the circumference of 360 degrees, so that the entire circumferential surface of the coil 112 can be directly sprayed with oil.
엔드커버(122)는 커버바디(130)와 외측커버부(131)로 구성될 수 있다. 커버바디(130)의 중앙부에 베어링 수용부(125)가 구비되고, 베어링 수용부(125)의 내부에 베어링(126)이 수용될 수 있다.The end cover 122 may be composed of a cover body 130 and an outer cover portion 131. The bearing accommodation portion 125 is provided at the center of the cover body 130, and the bearing 126 may be accommodated inside the bearing accommodation portion 125.
커버바디(130)의 내부에 오일분배부(132)가 원주방향을 따라 연장될 수 있다. 오일분배부(132)는 오일유로(123)를 형성할 수 있다. 오일분배부(132)는 일측이 오일유입구(124)와 연통되게 연결되고, 타측이 복수의 노즐(127)과 연통되게 연결될 수 있다.The oil distribution unit 132 may be extended along the circumferential direction inside the cover body 130. The oil distribution part 132 may form an oil passage 123. The oil distribution part 132 may be connected to one side in communication with the oil inlet 124, and the other side in communication with a plurality of nozzles 127.
이러한 구성에 의하면, 오일이 오일유입구(124)를 통해 오일분배부(132)의 내부에 유입될 수 있다. 오일은 오일분배부(132)를 따라 원주방향으로 이동함에 따라 오일분배부(132)는 오일을 복수의 노즐(127)로 분배할 수 있다.According to this configuration, oil may be introduced into the oil distribution unit 132 through the oil inlet 124. As the oil moves in the circumferential direction along the oil distribution unit 132, the oil distribution unit 132 may distribute oil to a plurality of nozzles 127.
오일분배부(132)의 내측면은 노즐(127)과 연통되는 홀을 제외하고 막혀 있고, 오일분배부(132)의 외측면은 개방될 수 있다.The inner surface of the oil distribution unit 132 is blocked except for a hole communicating with the nozzle 127, and the outer surface of the oil distribution unit 132 may be opened.
베어링 수용부(125)는 모터 하우징(100)의 수용공간을 향해 개방되어, 베어링(126)이 베어링 수용부(125)에 수용될 수 있다.The bearing accommodating part 125 is opened toward the accommodating space of the motor housing 100 so that the bearing 126 can be accommodated in the bearing accommodating part 125.
외측커버부(131)는 오일분배부(132)를 덮도록 커버바디(130)의 외측면에 장착될 수 있다.The outer cover part 131 may be mounted on the outer surface of the cover body 130 to cover the oil distribution part 132.
외측커버부(131)와 커버바디(130) 각각의 가장자리에 복수의 체결홀이 관통 형성될 수 있다. 복수의 체결부재는 체결홀을 통해 외측커버부(131)와 커버바디(130)를 체결할 수 있다.A plurality of fastening holes may be formed through the edges of each of the outer cover portion 131 and the cover body 130. The plurality of fastening members may fasten the outer cover portion 131 and the cover body 130 through the fastening holes.
모터 하우징(100)의 저면에 복수의 오일유출구(103)가 형성되어, 오일을 유출시킬 수 있다. 복수의 오일유출구(103)는 모터 하우징(100)의 외주면 양단부에 각각 배치될 수 있다.A plurality of oil outlets 103 are formed on the bottom surface of the motor housing 100 to allow oil to flow out. The plurality of oil outlets 103 may be respectively disposed at both ends of the outer circumferential surface of the motor housing 100.
오일유출구(103)는 오일펌프에 연결될 수 있다. 오일펌프는 토출구가 오일유입구(124)와 연통되게 연결되고, 오일유출구(103)를 통해 유출된 오일을 펌핑하여 오일유입구(124)로 이송하며 순환시킬 수 있다.The oil outlet 103 may be connected to an oil pump. The oil pump is connected to the discharge port in communication with the oil inlet 124, and pumps the oil spilled through the oil outlet 103 to be transported to the oil inlet 124 for circulation.
따라서, 본 발명에 따르면, 복수의 엔드커버(122) 각각은 내부에 오일유로(123)를 형성하고, 엔드커버(122)의 내측면에 복수의 노즐(127)을 구비하고, 복수의 노즐(127)은 스테이터 코어(111) 및 코일(112)을 향해 축방향으로 연장되는 제1노즐(128)과 로터(120)를 향해 경사지게 연장되는 제2노즐(129)을 포함하여, 전동기의 출력 증대를 위해 스테이터 코어(111)의 적층길이가 가변되어도 오일의 분사를 위한 노즐(127)을 재설계할 필요가 없고, 오일을 스테이터 코어(111), 코일(112) 및 로터(120)에 분사하여 전동기를 냉각함으로써 전동기의 효율을 높일 수 있다.Accordingly, according to the present invention, each of the plurality of end covers 122 forms an oil passage 123 therein, a plurality of nozzles 127 are provided on the inner surface of the end cover 122, and a plurality of nozzles ( 127) includes a stator core 111 and a first nozzle 128 extending axially toward the coil 112 and a second nozzle 129 extending obliquely toward the rotor 120, thereby increasing the output of the electric motor Even if the stacking length of the stator core 111 is variable, it is not necessary to redesign the nozzle 127 for spraying oil, and spraying oil to the stator core 111, the coil 112, and the rotor 120. The efficiency of the electric motor can be increased by cooling the electric motor.
또한, 복수의 노즐(127)이 360도 전체 원주를 따라 이격 배치됨으로, 스테이터 코어(111) 또는 코일(112)의 양단부 각각의 전체 원주면을 따라 균일하게 냉각할 수 있다.In addition, since the plurality of nozzles 127 are spaced apart along the entire circumference of 360 degrees, it is possible to uniformly cool along the entire circumferential surface of each of both ends of the stator core 111 or the coil 112.
도 7은 본 발명의 제2실시예에 따른 전동기의 커버형 오일분사구조를 보여주는 개념도이고, 도 8은 도 7에서 전동기의 다른 구현예를 보여주는 개념도이고, 도 9는 도 8에서 엔드커버(210)의 외측커버가 탈거된 후, 엔드커버(210) 내부의 노즐을 보여주는 개념도이고, 도 10은 도 9에서 X-X를 따라 단면도로서, 스테이터 및 로터의 적층길이가 증가된 전동기를 보여주는 개념도이고, 도 11은 도 10에서 스테이터 및 로터의 적층길이가 감소된 전동기를 보여주는 개념도이고, 도 12는 도 10에서 XII-XII를 따라 취한 단면도이고, 도 13은 도 11에서 엔드커버(210)를 제거한 후 모터 하우징(200)을 보여주는 개념도이고, 도 14는 도 13에서 XIV-XIV를 따라 취한 단면도이고, 도 15는 도 14에서 스테이터 코어(215)를 제거한 후 모터 하우징(200)을 보여주는 개념도이고, 도 16은 도 10에서 엔드커버(210)의 내측면에 돌출 형성된 복수의 노즐(218,219,220)을 보여주는 개념도이다.7 is a conceptual diagram showing a cover type oil injection structure of an electric motor according to a second embodiment of the present invention, FIG. 8 is a conceptual diagram showing another embodiment of the electric motor in FIG. 7, and FIG. 9 is an end cover 210 in FIG. 8 ) Is a conceptual view showing the nozzle inside the end cover 210 after the outer cover is removed, and FIG. 10 is a cross-sectional view along XX in FIG. 9, which is a conceptual view showing an electric motor having an increased stacking length of a stator and a rotor. 11 is a conceptual view showing an electric motor having a reduced stacking length of a stator and a rotor in FIG. 10, FIG. 12 is a cross-sectional view taken along XII-XII in FIG. 10, and FIG. 13 is a motor after removing the end cover 210 in FIG. A conceptual diagram showing the housing 200, FIG. 14 is a cross-sectional view taken along XIV-XIV in FIG. 13, and FIG. 15 is a conceptual diagram showing the motor housing 200 after removing the stator core 215 in FIG. Is a conceptual view showing a plurality of nozzles 218, 219 and 220 protruding from the inner surface of the end cover 210 in FIG.
본 발명은 전동기의 출력 증대를 위해 스테이터 코어(215)의 적층길이를 축방향으로 증가시키거나 로터코어(217)의 적층길이를 축방향으로 증가시킬 수 있다.The present invention can increase the stacking length of the stator core 215 in the axial direction or increase the stacking length of the rotor core 217 in the axial direction to increase the output of the electric motor.
이를 위해, 모터 하우징(200)은 연장부(202)를 더 구비할 수 있다. 연장부(202)는 모터 하우징(200)의 길이가 길이방향 또는 축방향으로 연장된 부분을 의미한다. To this end, the motor housing 200 may further include an extension 202. The extension portion 202 means a portion in which the length of the motor housing 200 extends in the longitudinal direction or in the axial direction.
이에 의해, 스테이터 코어(215) 또는 로터코어(217)의 적층길이가 축방향으로 확장 가능하게(scalable) 모터 하우징(200)의 길이가 연장될 수 있다.Accordingly, the length of the motor housing 200 may be extended such that the stacking length of the stator core 215 or the rotor core 217 is axially scalable.
모터 하우징(200)의 오일유로(201)와 엔드커버(210)의 오일유로(213)가 서로 연통되게 연결될 수 있다. 이 경우에 모터 하우징(200)에 오일유입구(214)가 형성되지 않고, 오일유입구(214)는 복수의 엔드커버(210) 각각에만 구비될 수 있다.The oil passage 201 of the motor housing 200 and the oil passage 213 of the end cover 210 may be connected to each other in communication. In this case, the oil inlet 214 is not formed in the motor housing 200, and the oil inlet 214 may be provided only in each of the plurality of end covers 210.
복수의 엔드커버(210)는 프런트 커버(211)와 리어 커버(212)로 구성될 수 있다.The plurality of end covers 210 may include a front cover 211 and a rear cover 212.
프런트 커버(211)는 축관통홀을 중앙부에 구비하고, 축관통홀을 통해 회전축(133)이 관통되어 프런트 커버(211)의 밖으로 돌출될 수 있다.The front cover 211 has an axial through hole in the center, and a rotation shaft 133 may penetrate through the axial through hole to protrude out of the front cover 211.
리어 커버(212)는 축수용홀을 중앙부에 구비하되, 회전축(133)이 리어 커버(212)의 외부로 돌출되지 않고 리어 커버(212)의 축수용홀에 수용될 수 있다.The rear cover 212 is provided with a hole for shafting in the center, but the rotation shaft 133 may be accommodated in the shafting hole of the rear cover 212 without protruding to the outside of the rear cover 212.
연장부(202)는 리어 커버(212)를 향하는 모터 하우징(200)의 일단부 내측에 형성될 수 있다.The extension 202 may be formed inside one end of the motor housing 200 facing the rear cover 212.
복수의 엔드커버(210)의 내측면에 복수의 제1노즐(218) 내지 복수의 제3노즐(220)을 구비할 수 있다.A plurality of first nozzles 218 to a plurality of third nozzles 220 may be provided on the inner surface of the plurality of end covers 210.
복수의 제1노즐(218)은 엔드커버(210)에서 축방향으로 돌출되게 연장되어, 스테이터 코어(215) 및 코일(216)에 오일을 분사하도록 구성될 수 있다.The plurality of first nozzles 218 may extend to protrude in the axial direction from the end cover 210, and may be configured to spray oil to the stator core 215 and the coil 216.
복수의 제2노즐(219)은 엔드커버(210)에서 로터를 향해 경사지게 연장되어, 로터에 오일을 분사하도록 구성될 수 있다.The plurality of second nozzles 219 extends obliquely from the end cover 210 toward the rotor, and may be configured to spray oil on the rotor.
복수의 제1노즐(218)과 복수의 제2노즐(219)은 원주방향으로 교대로 배치될 수 있다.The plurality of first nozzles 218 and the plurality of second nozzles 219 may be alternately arranged in a circumferential direction.
복수의 제1노즐(218)과 복수의 제2노즐(219)은 스테이터 코어(215)의 슬롯(1110) 또는 티스(1111)와 축방향으로 중첩되게 배치될 수 있다.The plurality of first nozzles 218 and the plurality of second nozzles 219 may be disposed to overlap the slot 1110 or the teeth 1111 of the stator core 215 in the axial direction.
복수의 제3노즐(220)은 모터 하우징(200)과 스테이터 코어(215) 사이에 형성되는 복수의 오일분사영역부(204)에 오일을 분사하도록 구성될 수 있다.The plurality of third nozzles 220 may be configured to spray oil to a plurality of oil injection area portions 204 formed between the motor housing 200 and the stator core 215.
복수의 노즐(218,219,220) 각각은 파이프 형태로 돌출되거나 엔드커버(210)의 내측에 가늘고 긴 홀(hole) 형태로 형성될 수 있다. 본 실시예에서는 복수의 노즐(218,219,220)이 파이프 형태로 돌출된 모습을 보여준다.Each of the plurality of nozzles 218, 219, and 220 may protrude in a pipe shape or may be formed in an elongated hole shape inside the end cover 210. In this embodiment, a plurality of nozzles 218, 219, and 220 are shown protruding in the form of a pipe.
프런트 커버(211)에서 돌출된 복수의 노즐(218,219,220) 각각은 리어 커버(212)에서 돌출된 복수의 노즐(218,219,220)보다 축방향으로 더 길게 돌출될 수 있다. Each of the plurality of nozzles 218, 219 and 220 protruding from the front cover 211 may protrude longer in the axial direction than the plurality of nozzles 218, 219 and 220 protruding from the rear cover 212.
스테이터 코어(215)는 모터 하우징(200)의 내주면에 압입될 수 있다. 스테이터 코어(215)가 압입되는 압입면(203)은 모터 하우징(200)의 내주면에 복수개로 원주방향으로 이격되게 형성될 수 있다. The stator core 215 may be pressed into the inner circumferential surface of the motor housing 200. A plurality of press-in surfaces 203 through which the stator core 215 is pressed may be formed to be spaced apart in a circumferential direction on a plurality of inner circumferential surfaces of the motor housing 200.
복수의 압입면(203) 각각은 축방향으로 연장될 수 있다. 복수의 압입면(203) 각각에 돌출부(2031)가 돌출 형성될 수 있다. 돌출부(2031)는 스테이터 코어(215)가 모터 하우징(200)의 압입면(203)에 압입 시 돌출부(2031)에 걸림으로, 스테이터 코어(215)가 압입면(203)에서 축방향으로 이탈되는 것을 방지할 수 있다.Each of the plurality of press-in surfaces 203 may extend in the axial direction. A protrusion 2031 may be protruded on each of the plurality of press-in surfaces 203. The protrusion 2031 is caught by the protrusion 2031 when the stator core 215 is pressed into the press-in surface 203 of the motor housing 200, so that the stator core 215 is axially deviated from the press-in surface 203. Can be prevented.
복수의 오일분사영역부(204)와 복수의 압입면(203)은 원주방향으로 교대로 형성될 수 있다.The plurality of oil injection region portions 204 and the plurality of press-in surfaces 203 may be alternately formed in the circumferential direction.
오일분사영역부(204)는 원주방향으로 인접한 두 압입면(203) 사이에 형성될 수 있다.The oil injection region portion 204 may be formed between two press-fit surfaces 203 adjacent in the circumferential direction.
복수의 오일분사영역부(204)는 360도 전체 원주면을 따라 이격 배치될 수 있다.The plurality of oil injection area portions 204 may be spaced apart along the entire circumferential surface of 360 degrees.
복수의 제3노즐(220)은 엔드커버(210)에서 오일분사영역부(204)를 향해 축방향으로 돌출되게 연장될 수 있다. 복수의 제3노즐(220)은 오일분사영역부(204)와 축방향으로 중첩되게 배치될 수 있다.The plurality of third nozzles 220 may extend from the end cover 210 to protrude in the axial direction toward the oil injection area portion 204. The plurality of third nozzles 220 may be disposed to overlap with the oil injection region portion 204 in the axial direction.
이러한 구성에 의하면, 오일은 스테이터 코어(215)의 외주면과 모터 하우징(200)의 내주면 사이에 형성된 오일분사영역부(204)에 분사됨으로써, 스테이터 코어(215)의 전단부와 후단부는 물론, 스테이터 코어(215)의 중앙부까지 오일이 침투되어 스테이터 코어(215)의 원주면 전체를 원활하게 냉각할 수 있다.According to this configuration, the oil is sprayed on the oil injection region portion 204 formed between the outer circumferential surface of the stator core 215 and the inner circumferential surface of the motor housing 200, so that the front and rear ends of the stator core 215, as well as the stator Oil penetrates to the central portion of the core 215 to smoothly cool the entire circumferential surface of the stator core 215.
복수의 노즐(218,219,220)은 스테이터 코어(215)의 적층길이가 최대로 길 때 스테이터 코어(215)의 일단부와 축방향으로 가장 가깝게 배치될 수 있다.The plurality of nozzles 218, 219, and 220 may be disposed closest to one end of the stator core 215 in the axial direction when the stacking length of the stator core 215 is maximum.
복수의 노즐(218,219,220)은 스테이터 코어(215)의 적층길이가 최소로 짧을 때 스테이터 코어(215)의 일단부와 축방향으로 가장 멀게 배치될 수 있다.The plurality of nozzles 218, 219 and 220 may be disposed farthest in the axial direction with one end of the stator core 215 when the stacking length of the stator core 215 is minimally short.
복수의 노즐(218,219,220)과 스테이터 코어(215)와 멀리 이격될 경우에 오일이 복수의 노즐(218,219,220)을 통해 원하는 방향으로 분사되지 않을 수 있다.When the plurality of nozzles 218, 219 and 220 are spaced apart from the stator core 215, oil may not be sprayed in a desired direction through the plurality of nozzles 218 and 219 and 220.
예를 들면, 제1노즐(218)과 코일(216) 사이의 간격이 멀 경우에 축방향으로 연장되는 제1노즐(218)은 오일의 분사압력 또는 중력에 영향을 받아 오일을 코일(216)로 분사하지 못 할 수 있다. For example, when the distance between the first nozzle 218 and the coil 216 is far, the first nozzle 218 extending in the axial direction is affected by the injection pressure or gravity of the oil to coil the oil 216 May not be sprayed.
특히, 오일분사영역부(204)는 모터 하우징(200)과 스테이터 코어(215) 사이의 간극이 매우 좁기 때문에, 오일분사영역부(204)의 내부에 오일이 침투되도록 하기 위해서는 노즐(218,219,220)과 오일분사영역 간의 간격이 가까운 것이 바람직하다.Particularly, since the gap between the motor housing 200 and the stator core 215 is very narrow, the oil injection region 204 has nozzles 218, 219 and 220 to allow oil to penetrate into the oil injection region 204. It is desirable that the distance between the oil injection regions is close.
따라서, 노즐(218,219,220)은 스테이터 코어(215)의 적층길이에 따라 오일의 분사방향을 정조준하기 위해서는 노즐(218,219,220)의 길이를 연장할 필요가 있다.Therefore, the nozzles 218, 219, 220 need to extend the lengths of the nozzles 218, 219, 220 in order to aim and aim the oil injection direction according to the stacking length of the stator core 215.
스테이터 코어(215)의 적층길이가 짧을 경우에 노즐(218,219,220)과 스테이터 코어(215) 및 엔드코일(216) 간의 간격이 멀리 떨어지게 되므로, 노즐(218,219,220)의 길이가 연장되는 것이 바람직하다.When the stacking length of the stator core 215 is short, the distance between the nozzles 218, 219 and 220 and the stator core 215 and the end coil 216 is far apart, so it is preferable that the length of the nozzles 218 and 219 and 220 be extended.
이를 위해, 복수의 노즐연장부(221)가 복수의 노즐(218,219,220)에 각각 결합되어, 노즐(218,219,220)의 길이를 연장할 수 있다. 노즐(218,219,220)은 노즐연장부(221)의 일단부 내측에 압입되거나 나사 체결될 수 있다.To this end, a plurality of nozzle extensions 221 are coupled to the plurality of nozzles 218, 219, 220, respectively, to extend the length of the nozzles 218, 219, 220. The nozzles 218, 219, and 220 may be press-fitted or screwed into one end of the nozzle extension portion 221.
이러한 구성에 의하면, 노즐연장부(221)는 전동기의 출력 증대로 스테이터 코어(215)의 적층길이가 증가함에 따라, 노즐(218,219,220)과 분사대상 간의 간격이 멀어질 경우에 노즐(218,219,220)에 노즐연장부(221)를 결합하여 노즐(218,219,220)의 길이를 연장함으로써, 노즐(218,219,220)의 오일 직진성을 안내하여 분사하고자 하는 곳에 정확히 분사하여 오일로 효율적으로 냉각할 수 있다.According to this configuration, as the stacking length of the stator core 215 increases as the output of the electric motor increases, the nozzle 218, 219, 220 nozzles when the distance between the nozzles 218, 219, 220 and the spray target increases. By extending the length of the nozzles 218, 219 and 220 by combining the extensions 221, it is possible to efficiently cool the oil with an oil spray by accurately guiding the oil straightness of the nozzles 218 and 219 and 220.
제1노즐(218)은 스테이터 코어(215) 및 코일(216)로 오일을 분사하여 스테이터를 냉각할 수 있다.The first nozzle 218 may cool the stator by spraying oil to the stator core 215 and the coil 216.
제2노즐(219)은 로터로 오일을 분사하여 로터를 냉각할 수 있다.The second nozzle 219 may cool the rotor by spraying oil with the rotor.
제3노즐(220)은 스테이터 코어(215)의 외주면과 모터 하우징(200)의 내주면 사이의 오일분사영역부(204)에 오일을 분사하여 스테이터 코어(215) 및 코일(216)의 중앙부를 냉각할 수 있다.The third nozzle 220 cools the central portion of the stator core 215 and the coil 216 by spraying oil to the oil injection area portion 204 between the outer circumferential surface of the stator core 215 and the inner circumferential surface of the motor housing 200. can do.
노즐연장부(221)는 스테이터 코어(215)의 적층길이에 따라 노즐에 선택적으로 결합될 수 있다.The nozzle extension portion 221 may be selectively coupled to the nozzle according to the stacking length of the stator core 215.
도 17은 도 14에서 오일분사영역부(204)에 복수의 돌출리브(222)가 형성된 모습을 보여주는 개념도이고, 도 18은 도 17에서 스테이터 코어(215)가 삭제된 후 복수의 돌출리브(222)를 보여주는 개념도이다.FIG. 17 is a conceptual view showing a state in which a plurality of protruding ribs 222 are formed in the oil injection area part 204 in FIG. 14, and FIG. 18 is a plurality of protruding ribs 222 after the stator core 215 is deleted in FIG. It is a conceptual diagram showing ).
복수의 오일분사영역부(204) 각각은 원호 길이가 압입면(203)의 원호 길이보다 더 길게 형성될 수 있다.Each of the plurality of oil injection area portions 204 may have a circular arc length longer than that of the press-in surface 203.
복수의 오일분사영역부(204) 각각에 복수의 돌출리브(222)가 더 구비될 수 있다. 복수의 돌출리브(222) 각각은 오일분사영역부(204)의 반경방향 외측면에서 반경방향 내측방향으로 돌출 형성될 수 있다. A plurality of protruding ribs 222 may be further provided in each of the plurality of oil injection region portions 204. Each of the plurality of protruding ribs 222 may be formed to protrude in the radially inner direction from the radially outer surface of the oil injection region portion 204.
복수의 돌출리브(222)의 내측단은 압입면(203)과 동일한 원주면 상에 위치하여, 복수의 돌출리브(222)와 스테이터 코어(215)의 외주면이 서로 접촉될 수 있다.The inner ends of the plurality of protruding ribs 222 are located on the same circumferential surface as the press-fitting surface 203, so that the plurality of protruding ribs 222 and the outer circumferential surfaces of the stator core 215 may contact each other.
복수의 돌출리브(222) 각각은 축방향으로 연장될 수 있다. 돌출리브(222)는 사각형 단면 형상으로 형성될 수 있다.Each of the plurality of protruding ribs 222 may extend in the axial direction. The protruding rib 222 may be formed in a rectangular cross-sectional shape.
복수의 돌출리브(222)는 오일분사영역부(204)의 원주방향으로 이격 배치될 수 있다. 복수의 돌출리브(222) 사이의 간격은 돌출리브(222)의 가로길이(원주방향 폭)보다 더 넓게 형성될 수 있다.The plurality of protruding ribs 222 may be spaced apart in the circumferential direction of the oil injection region portion 204. The spacing between the plurality of protruding ribs 222 may be formed to be wider than the horizontal length (circumferential width) of the protruding ribs 222.
이러한 구성에 의하면, 복수의 돌출리브(222)는 스테이터 코어(215)와 접촉됨으로 스테이터 코어(215)와 모터 하우징(200) 간의 열교환 면적을 증가시킬 수 있다.According to this configuration, the plurality of protruding ribs 222 may contact the stator core 215 to increase the heat exchange area between the stator core 215 and the motor housing 200.
또한, 복수의 돌출리브(222)는 오일분사영역부(204)를 따라 흐르는 오일의 이동면적을 줄임으로 오일의 유속을 증가시킬 수 있다.In addition, the plurality of protruding ribs 222 may increase the flow rate of the oil by reducing the moving area of the oil flowing along the oil injection area portion 204.
뿐만 아니라, 복수의 돌출리브(222)는 오일분사영역부(204)를 따라 흐르는 오일흐름의 직진성을 안내할 수 있다.In addition, the plurality of protruding ribs 222 may guide the straightness of the oil flow flowing along the oil injection area portion 204.
아울러, 복수의 돌출리브(222)는 모터 하우징(200)의 내주면에서 반경방향으로 돌출되어, 모터 하우징(200)의 강도를 보강할 수 있다.In addition, the plurality of protruding ribs 222 may protrude in the radial direction from the inner circumferential surface of the motor housing 200 to reinforce the strength of the motor housing 200.
기타 구성요소는 전술한 실시예와 동일 내지 유사하므로, 중복되는 설명은 생략하기로 한다.Other components are the same or similar to the above-described embodiment, and thus duplicate description will be omitted.
도 19는 본 발명에 따른 로터의 적층길이가 최대일 때 무게중심(312)을 보여주는 개념도이고, 도 20은 로터의 적층길이가 최소일 때 무게중심(312)이 변하는 모습을 보여주는 개념도이고, 도 21은 도 19에서 복수의 노즐(326)을 통해 오일이 분사되는 모습을 보여주는 개념도이고, 도 22는 도 20에서 복수의 노즐(326)을 통해 오일이 분사되는 모습을 보여주는 개념도이다.19 is a conceptual diagram showing the center of gravity 312 when the stacking length of the rotor according to the present invention is the maximum, and FIG. 20 is a conceptual diagram showing the shape of the center of gravity 312 changing when the stacking length of the rotor is the minimum. 21 is a conceptual diagram showing a state in which oil is injected through a plurality of nozzles 326 in FIG. 19, and FIG. 22 is a conceptual view showing a state in which oil is injected through a plurality of nozzles 326 in FIG.
회전축(300)의 일측에 축방향이동제한돌기(303)가 형성되어, 로터가 회전축(300)에서 축방향으로 이동하는 것을 제한할 수 있다. 축방향이동제한돌기(303)는 회전축(300)에서 로터의 일단부를 고정하도록 회전축(300)과 일체로 형성될 수 있다. 축방향이동제한돌기(303)는 회전축(300)에서 반경방향으로 돌출 형성될 수 있다.An axial movement limiting protrusion 303 is formed on one side of the rotating shaft 300, so that the rotor can be restricted from moving in the axial direction from the rotating shaft 300. The axial movement limiting projection 303 may be integrally formed with the rotating shaft 300 to fix one end of the rotor in the rotating shaft 300. The axial movement limiting projection 303 may be formed to protrude radially from the rotating shaft 300.
로터코어(310)의 타단부는 락 너트(304; lock nut)에 의해 고정될 수 있다. 락 너트(304)는 회전축(300)의 타측에 나사 체결되어, 로터코어(310)가 축방향 반대측으로 이동하는 것을 제한할 수 있다.The other end of the rotor core 310 may be fixed by a lock nut (304). Lock nut 304 is screwed to the other side of the rotating shaft 300, it is possible to limit the rotor core 310 to move in the opposite axial direction.
로터는 로터코어(310), 영구자석 및 엔드플레이트(311)로 구성될 수 있다.The rotor may be composed of a rotor core 310, a permanent magnet and an end plate 311.
로터코어(310)는 복수의 전기강판을 적층 결합하여 구성될 수 있다. 복수의 영구자석은 로터코어(310)의 내부에 매입 설치될 수 있다. 엔드플레이트(311)는 영구자석이 로터코어(310)에서 축방향으로 이탈되는 것을 방지하기 위해 로터코어(310)의 양단부에 각각 설치될 수 있다.The rotor core 310 may be formed by stacking and combining a plurality of electrical steel sheets. The plurality of permanent magnets may be embedded and installed in the rotor core 310. The end plates 311 may be respectively installed at both ends of the rotor core 310 to prevent the permanent magnets from being separated from the rotor core 310 in the axial direction.
축방향이동제한돌기(303)는 회전축(300)에서 고정되어 있어서, 로터코어(310)의 적층길이가 축방향으로 증가하여도 로터코어(310)의 일단부는 축방향이동제한돌기(303)에 의해 그 위치의 변함이 없다.The axial movement limiting projection 303 is fixed at the rotating shaft 300, so that even if the stacking length of the rotor core 310 increases in the axial direction, one end of the rotor core 310 remains at the axial movement limiting projection 303. There is no change in the position.
로터코어(310)의 적층길이가 변화함에 따라 로터의 무게중심(312)이 이동할 수 있다.As the stacking length of the rotor core 310 changes, the center of gravity 312 of the rotor may move.
예를 들면, 로터코어(310)의 적층길이가 증가하면 로터의 무게중심(312)은 축방향이동제한돌기(303)로부터 멀어지고, 로터코어(310)의 적층길이가 감소하면 로터의 무게중심(312)은 축방향이동제한돌기(303)를 향해 가까워지게 이동할 수 있다.For example, when the stacking length of the rotor core 310 increases, the center of gravity 312 of the rotor moves away from the axial movement limiting projection 303, and when the stacking length of the rotor core 310 decreases, the center of gravity of the rotor decreases. 312 may move closer to the axial movement limiting projection 303.
이와 같이, 로터코어(310)의 적층길이 변화에 따라 로터의 무게중심(312)이 이동함으로 인해 로터의 무게중심(312)과 베어링(126) 간의 거리가 변경되어, 로터의 진동 특성이 불안정해질 수 있다.As such, the distance between the center of gravity 312 of the rotor and the bearing 126 is changed due to the movement of the center of gravity 312 of the rotor as the stacking length of the rotor core 310 changes, and the vibration characteristics of the rotor become unstable. Can.
로터코어(310)의 적층길이가 변함에 따라 로터의 일단부는 축방향이동제한돌기(303)에 의해 고정되고, 축방향이동제한돌기(303)로부터 반대 축방향으로 이격된 로터의 타단부는 그 위치가 변경될 수 있다.As the stacking length of the rotor core 310 changes, one end of the rotor is fixed by the axial movement limiting projection 303, and the other end of the rotor spaced apart from the axial movement limiting projection 303 in the opposite axial direction is Location can be changed.
축방향이동제한돌기(303)와 가깝게 배치된 회전축(300)의 일단부를 회전가능하게 지지하는 베어링(126)은 로터코어(310)의 적층길이에 상관없이 고정되고, 축방향이동제한돌기(303)와 멀게 배치된 회전축(300)의 타단부를 회전가능하게 지지하는 베어링(126)은 로터코어(310)의 적층길이 변경에 따라 가변되는 것이 바람직하다.The bearing 126 rotatably supporting one end of the rotating shaft 300 disposed close to the axial movement limiting projection 303 is fixed regardless of the stacking length of the rotor core 310, and the axial movement limiting projection 303 ) It is preferable that the bearing 126 rotatably supporting the other end of the rotating shaft 300 disposed away from the rotor core 310 according to a change in the stacking length of the rotor core 310.
본 발명은 베어링 연장부(314)를 더 구비하고, 베어링 연장부(314)는 로터코어(310)의 적층길이에 따라 베어링(126)의 위치를 조절하도록 구성될 수 있다.The present invention further includes a bearing extension 314, the bearing extension 314 may be configured to adjust the position of the bearing 126 according to the stacking length of the rotor core 310.
베어링 연장부(314)는 로터의 무게중심(312)이 축방향이동제한돌기(303)와 가까워지는 축방향으로 이동할 때 베어링 수용부(313)에 결합되어, 베어링(126)의 위치를 변경할 수 있다.The bearing extension portion 314 is coupled to the bearing receiving portion 313 when the center of gravity 312 of the rotor moves in the axial direction approaching the axial movement limiting projection 303, so that the position of the bearing 126 can be changed. have.
회전축(300)은 제1회전축부(301)와 제2회전축부(302)로 구성될 수 있다. 제1회전축부(301)는 로터코어(310)를 지지하며, 제2회전축부(302)보다 직경이 더 크게 형성될 수 있다. 제2회전축부(302)는 베어링(126)을 지지하며, 제1회전축부(301)보다 직경이 작게 형성될 수 있다.The rotating shaft 300 may include a first rotating shaft portion 301 and a second rotating shaft portion 302. The first rotating shaft portion 301 supports the rotor core 310 and may have a larger diameter than the second rotating shaft portion 302. The second rotating shaft portion 302 supports the bearing 126 and may have a smaller diameter than the first rotating shaft portion 301.
로터코어(310)의 적층길이가 최대일 때, 베어링 연장부(314) 없이 베어링(126)은 엔드커버(210)에 형성된 베어링 수용부(313)에 수용되게 설치될 수 있다.When the stacking length of the rotor core 310 is maximum, the bearing 126 without the bearing extension 314 may be installed to be accommodated in the bearing receiving portion 313 formed on the end cover 210.
로터코어(310)의 적층길이가 최소일 때, 베어링(126)은 베어링 연장부(314)의 일단부 내측에 수용되고, 제2회전축부(302)에 장착되어, 회전축(300)의 타단부를 회전 가능하게 지지할 수 있다.When the stacking length of the rotor core 310 is minimum, the bearing 126 is accommodated inside one end of the bearing extension 314 and mounted on the second rotating shaft 302, the other end of the rotating shaft 300 Can be rotatably supported.
베어링 연장부(314)의 내부에 수용되는 베어링(126)의 위치는 로터코어(310)의 적층길이에 따라 변경될 수 있다. 예를 들면, 로터코어(310)의 적층길이가 짧을수록 베어링(126)은 로터의 무게중심(312)과 가까워지는 방향으로 베어링 연장부(314)의 일단부를 향하여 인접하게 배치될 수 있다.The position of the bearing 126 accommodated inside the bearing extension 314 may be changed according to the stacking length of the rotor core 310. For example, as the stacking length of the rotor core 310 is shorter, the bearing 126 may be disposed adjacent to one end of the bearing extension 314 in a direction closer to the center of gravity 312 of the rotor.
이러한 구성에 의하면, 베어링 연장부(314)는 로터의 적층길이에 따라 베어링(126)의 위치를 가변시킬 수 있어서, 예를 들어 로터의 적층길이가 최소일 때 베어링(126)의 위치가 로터의 무게중심(312)을 향해 가까워지는 방향으로 이동시킴으로 로터의 무게중심(312)과 베어링(126) 사이의 거리 변경으로 인해 로터의 진동 특성이 불안정해지는 것을 방지할 수 있다.According to this configuration, the bearing extension 314 can vary the position of the bearing 126 according to the stacking length of the rotor, for example, when the stacking length of the rotor is minimal, the position of the bearing 126 is By moving in the direction toward the center of gravity 312, the vibration characteristics of the rotor can be prevented from becoming unstable due to a change in the distance between the center of gravity 312 of the rotor and the bearing 126.
복수의 노즐(326)은 베어링(126)에 오일을 분사하는 베어링 노즐(317)을 더 포함할 수 있다.The plurality of nozzles 326 may further include a bearing nozzle 317 spraying oil on the bearing 126.
베어링 오일유로(315)는 베어링 수용부(313)의 내부에 형성될 수 있다. 베어링 오일유로(315)는 축방향으로 연장될 수 있다. 베어링 오일유로(315)는 엔드커버(210)의 오일유로(213)와 연통되게 연결될 수 있다.The bearing oil passage 315 may be formed inside the bearing receiving portion 313. The bearing oil passage 315 may extend in the axial direction. The bearing oil passage 315 may be connected to the oil passage 213 of the end cover 210 in communication.
베어링 오일유로(315)의 일단은 엔드커버(210)의 오일유로(213)와 연통되게 연결되고, 베어링 오일유로(315)의 타단에 오일을 로터로 향해 분사하는 복수의 제2노즐(219)이 형성될 수 있다.One end of the bearing oil passage 315 is connected in communication with the oil passage 213 of the end cover 210, a plurality of second nozzles 219 for spraying oil toward the rotor to the other end of the bearing oil passage 315 It can be formed.
엔드커버(210)는 스테이터 코어(215) 및 코일(216)을 향해 오일을 분사하는 복수의 제1노즐(218)을 구비할 수 있다.The end cover 210 may include a plurality of first nozzles 218 spraying oil toward the stator core 215 and the coil 216.
엔드커버(210)는 스테이터 코어(215)와 모터 하우징(200) 사이의 오일분사영역부(204)로 오일을 분사하는 복수의 제3노즐(220)을 구비할 수 있다. 제3노즐(220)은 엔드커버(210)의 반경방향으로 최외측에 배치되고, 제1노즐(218)은 엔드커버(210)의 반경방향으로 제3노즐(220)과 제2노즐(219) 사이에 배치될 수 있다.The end cover 210 may include a plurality of third nozzles 220 for spraying oil into the oil injection region 204 between the stator core 215 and the motor housing 200. The third nozzle 220 is disposed on the outermost side in the radial direction of the end cover 210, and the first nozzle 218 is the third nozzle 220 and the second nozzle 219 in the radial direction of the end cover 210 ).
엔드커버(210)는 베어링(126)으로 오일을 분사하는 복수의 베어링 노즐(317)을 더 포함할 수 있다.The end cover 210 may further include a plurality of bearing nozzles 317 spraying oil into the bearing 126.
베어링 노즐(317)은 베어링 오일유로(315)와 연통되게 연결될 수 있다. 복수의 베어링 노즐(317) 각각은 베어링 수용부(313)의 내측면에 베어링(126)을 향해 경사지게 연장될 수 있다.The bearing nozzle 317 may be connected to the bearing oil passage 315 in communication. Each of the plurality of bearing nozzles 317 may extend obliquely toward the bearing 126 on the inner surface of the bearing receiving portion 313.
베어링 연장부(314)의 내부에 베어링 연장 오일유로(316)가 형성될 수 있다. 베어링 연장 오일유로(316)는 축방향으로 연장될 수 있다. 베어링 연장 오일유로(316)는 베어링 오일유로(315)와 연통되게 연결될 수 있다. 베어링 연장 오일유로(316)의 일단은 베어링 오일유로(315)와 연통되게 연결되고, 베어링 연장 오일유로(316)의 타단에 로터를 향해 오일을 분사하는 제2노즐(219)이 형성될 수 있다.A bearing extension oil passage 316 may be formed inside the bearing extension part 314. The bearing extension oil passage 316 may extend in the axial direction. The bearing extension oil passage 316 may be connected to the bearing oil passage 315 in communication. One end of the bearing extension oil passage 316 may be connected to the bearing oil passage 315 in communication, and a second nozzle 219 for spraying oil toward the rotor may be formed at the other end of the bearing extension oil passage 316. .
베어링 연장부(314)의 내측면에 복수의 베어링 연장 노즐(318)이 베어링 연장 오일유로(316)와 연통되게 형성될 수 있다.A plurality of bearing extension nozzles 318 may be formed on the inner surface of the bearing extension part 314 to communicate with the bearing extension oil passage 316.
이러한 구성에 의하면, 베어링 노즐(317) 및 베어링 연장 노즐(318)은 로터의 적층길이에 따라 베어링(126)의 위치가 변경되어도, 베어링 연장부(314)에 형성되는 베어링 연장 노즐(318)의 위치를 조절함으로, 베어링(126)에 오일을 분사하여 베어링(126)을 냉각할 수 있다.According to this configuration, the bearing nozzle 317 and the bearing extension nozzle 318 of the bearing extension nozzle 318 formed in the bearing extension portion 314, even if the position of the bearing 126 is changed according to the stacking length of the rotor By adjusting the position, the bearing 126 can be cooled by spraying oil on the bearing 126.
도 23은 본 발명의 일 실시예에 따른 엔드커버(210)의 내부에 복수의 오일 흐름 방해벽(320)이 형성된 모습을 보여주는 개념도이다. 23 is a conceptual view showing a state in which a plurality of oil flow barriers 320 are formed inside the end cover 210 according to an embodiment of the present invention.
엔드커버(210)의 상부에 오일유입구(214)가 형성될 수 있다. 엔드커버(210)의 내부에 오일유로(213)가 원주방향을 따라 연장되어, 오일유로(213)를 따라 오일이 원주방향으로 흐를 수 있다. An oil inlet 214 may be formed on the top of the end cover 210. The oil passage 213 is extended along the circumferential direction inside the end cover 210, so that the oil can flow in the circumferential direction along the oil passage 213.
오일유입구(214)를 통해 유입된 오일은 엔드커버(210)의 상부에서 양방향(시계방향과 반시계방향)으로 분기되어 서로 반대방향으로 원주방향을 따라 이동하며 하부로 흘러내린다.The oil introduced through the oil inlet 214 branches in both directions (clockwise and counterclockwise) from the top of the end cover 210 and moves along the circumferential direction in opposite directions and flows downward.
오일유로(213)의 폭은 {엔드커버(210)의 직경-베어링 수용부(313)}X1/2로 정의될 수 있다. 베어링 수용부(313)는 엔드커버(210)의 중앙부에 형성될 수 있다.The width of the oil passage 213 may be defined as {diameter of the end cover 210-bearing accommodating portion 313}X1/2. The bearing accommodating portion 313 may be formed at the central portion of the end cover 210.
오일유로(213)의 폭이 너무 지나치게 넓으면 오일이 오일유로(213)의 하부에서 상방향으로 채워지므로, 오일이 오일유입구(214)를 통해 엔드커버(210)의 오일유로(213)로 유입될 때 오일의 상승속도가 늦어질 수 있다.If the width of the oil passage 213 is too wide, the oil is filled upward from the bottom of the oil passage 213, so that the oil flows into the oil passage 213 of the end cover 210 through the oil inlet 214. When the oil rises, the rate of oil rise may be slowed down.
이 경우 엔드커버(210)의 상부에 배치되는 노즐(326)은 엔드커버(210)의 하부에 배치되는 노즐(326)에 비해 오일이 공급되는 속도가 지연됨으로 인해, 예를 들면 코일(216)의 상부는 코일(216)의 하부에 비해 온도가 상승하게 되는 문제가 발생할 수 있다.In this case, the nozzle 326 disposed on the upper portion of the end cover 210 is delayed due to a delay in the oil supply speed compared to the nozzle 326 disposed on the lower portion of the end cover 210, for example, the coil 216. The upper portion of the coil 216 may have a problem that the temperature rises compared to the lower portion.
이러한 문제점을 해결하기 위해, 엔드커버(210)의 내부에 복수의 오일 흐름 방해벽(320)이 구비될 수 있다.In order to solve this problem, a plurality of oil flow barriers 320 may be provided inside the end cover 210.
오일 흐름 방해벽(320)은 반경방향으로 연장될 수 있다. 복수의 오일 흐름 방해벽(320)은 원주방향으로 이격 배치될 수 있다. 오일 흐름 방해벽(320)은 오일이 원주방향으로 흐르는 것을 방해할 수 있다.The oil flow barrier wall 320 may extend radially. The plurality of oil flow blocking walls 320 may be spaced apart in the circumferential direction. The oil flow blocking wall 320 may prevent oil from flowing in the circumferential direction.
오일 흐름 방해벽(320)의 반경방향으로 내측 단부는 베어링 수용부(313)의 외측면에 연결되고, 오일 흐름 방해벽(320)의 외측 단부는 엔드커버(210)의 외곽부 내측면과 반경방향으로 이격되게 형성되어, 오일이 원주방향으로 인접한 오일 흐름 방해벽(320)으로 이동할 수 있다.The radially inner end of the oil flow obstruction wall 320 is connected to the outer surface of the bearing accommodating portion 313, and the outer end of the oil flow obstruction wall 320 is radially inside the outer surface of the end cover 210. It is formed to be spaced apart in the direction, the oil can move to the adjacent oil flow barrier wall 320 in the circumferential direction.
오일 흐름 방해벽(320)의 외측 단부에 연통홀이 형성되어, 연통홀을 통해 오일이 원주방향으로 오일유로(213)를 따라 이동할수 있다.A communication hole is formed at an outer end of the oil flow barrier wall 320 so that the oil can move along the oil passage 213 in the circumferential direction through the communication hole.
원주방향으로 인접한 두 오일 흐름 방해벽(320) 사이에 복수의 노즐(326)이 배치될 수 있다. A plurality of nozzles 326 may be disposed between two oil flow barriers 320 adjacent in the circumferential direction.
엔드커버(210)의 상부에 위치하는 복수의 오일 흐름 방해벽(320)은 오일을 가두는 역할을 할 수 있다. 오일은 상부에 위치하는 두 오일 흐름 방해벽(320) 사이로 흘러내리면서 두 오일 흐름 방해벽(320)에 일정 량만큼 채워질 수 있다. The plurality of oil flow blocking walls 320 positioned on the upper end of the end cover 210 may serve to trap oil. Oil flows between the two oil flow barriers 320 located at the top, and may be filled with a certain amount of the two oil flow barriers 320.
오일은 오일유입구(214)를 통해 유입되어 상부에 위치하는 두 오일 흐름 방해벽(320) 사이의 임시 저장공간에 채워지며, 임시 저장공간에 오일이 가득 채워진 후 이웃하는 오일 흐름 방해벽(320)으로 이동하기 전에, 상부의 두 오일 흐름 방해벽(320) 사이에 위치하는 복수의 노즐(326)로 오일이 유입될 수 있다.Oil flows through the oil inlet 214 and fills the temporary storage space between the two oil flow barriers 320 located at the top, and after the oil is filled in the temporary storage space, the neighboring oil flow barriers 320 Before moving to, oil may be introduced into the plurality of nozzles 326 positioned between the two upper oil flow barrier walls 320.
이러한 구성에 의하면, 오일 흐름 방해벽(320)은 오일유로(213)를 따라 원주방향으로 흐르는 오일의 흐름을 방해함으로써, 복수의 노즐(326)이 엔드커버(210)의 상부에 위치하든 엔드커버(210)의 하부에 위치하든 상관없이 복수의 노즐(326)에 오일을 균등하게 분배할 수 있다.According to this configuration, the oil flow barrier wall 320 prevents the flow of oil flowing in the circumferential direction along the oil flow path 213, so that the plurality of nozzles 326 are located on the top of the end cover 210 or the end cover The oil may be evenly distributed to the plurality of nozzles 326 regardless of whether it is located at the bottom of the 210.
도 24는 본 발명의 다른 실시예에 따른 엔드커버(210)의 내부에 오일가이드벽(321)이 형성된 모습을 보여주는 개념도이다.24 is a conceptual view showing a state in which an oil guide wall 321 is formed inside the end cover 210 according to another embodiment of the present invention.
엔드 커버의 상부에 오일유입구(214)가 형성될 수 있다. 엔드커버(210)의 내부에 오일가이드벽(321)이 형성될 수 있다. 오일가이드벽(321)은 오일유로(213)를 형성할 수 있다.An oil inlet 214 may be formed on the upper end cover. An oil guide wall 321 may be formed inside the end cover 210. The oil guide wall 321 may form an oil passage 213.
오일가이드벽(321)은 동심원형 또는 똬리(coiled) 형태로 형성될 수 있다. 오일가이드벽(321)은 엔드커버(210)의 반경방향으로 최외곽부에서 내측방향으로 갈수록 곡률반경이 점점 작아지게 형성될 수 있다.The oil guide wall 321 may be formed in a concentric circular shape or a coiled shape. The oil guide wall 321 may be formed such that the radius of curvature becomes smaller as it goes from the outermost portion to the inner direction in the radial direction of the end cover 210.
오일가이드벽(321)은 여러 번 원주방향으로 회전하며 1개의 벽으로 연장될 수 있다. 예를 들면, 오일가이드벽(321)은 세 바퀴 360도 회전되게 연장될 수 있다. 반경방향으로 인접한 오일가이드벽(321) 사이에 복수의 노즐(326)이 형성될 수 있다. The oil guide wall 321 is rotated several times in the circumferential direction and can be extended to one wall. For example, the oil guide wall 321 may be extended to rotate 360 degrees three wheels. A plurality of nozzles 326 may be formed between radially adjacent oil guide walls 321.
오일가이드벽(321)의 일단은 엔드커버(210)의 외곽부 내측면에 연결되고, 오일가이드벽(321)의 타단은 베어링 수용부(313)의 외곽부에 연결될 수 있다.One end of the oil guide wall 321 may be connected to the inner surface of the outer portion of the end cover 210, and the other end of the oil guide wall 321 may be connected to the outer portion of the bearing receiving portion 313.
반경방향으로 인접한 오일가이드벽(321) 사이에 복수의 노즐(326)이 원주방향으로 이격 배치될 수 있다.A plurality of nozzles 326 may be spaced apart in the circumferential direction between the oil guide walls 321 adjacent in the radial direction.
복수의 노즐(326)은 오일가이드벽(321)에 의해 형성되는 오일유로(213)를 따라 이격 배치될 수 있다.The plurality of nozzles 326 may be spaced apart along the oil passage 213 formed by the oil guide wall 321.
이러한 구성에 의하면, 오일가이드벽(321)은 오일유입구(214)를 통해 유입된 오일을 엔드커버(210)의 최외곽 상부에서 반경방향 내측을 향해 원주방향으로 회전 이동시킴으로써, 복수의 노즐(326)이 엔드커버(210)의 상부에 위치하든 엔드커버(210)의 하부에 위치하든 복수의 노즐(326)에 오일을 균일하게 분배할 수 있다.According to this configuration, the oil guide wall 321 rotates the oil introduced through the oil inlet 214 in a circumferential direction from the outermost upper portion of the end cover 210 toward the radially inner side, thereby providing a plurality of nozzles 326 ) May be uniformly distributed to the plurality of nozzles 326, whether located at the top of the end cover 210 or the bottom of the end cover 210.
도 25는 본 발명의 일실시예에 따른 로터코어(310)의 적층길이에 따라 락 너트(304)의 체결위치가 달라지는 모습을 보여주는 개념도이고, 도 26은 본 발명의 다른 일실시예에 따른 로터코어(310)의 적층길이에 따라 키(325)가 키홈(324)에 체결되는 모습을 보여주는 개념도이고, 도 27 내지 도 29는 본 발명의 또 다른 실시예에 따른 로터코어(310)의 적층길이에 따라 서로 다른 위치에 형성된 키홈(324)에 키(325)가 결합된 모습을 보여주는 개념도이다.25 is a conceptual view showing a state in which the fastening position of the lock nut 304 is changed according to the stacking length of the rotor core 310 according to an embodiment of the present invention, and FIG. 26 is a rotor according to another embodiment of the present invention It is a conceptual diagram showing a state in which the key 325 is fastened to the key groove 324 according to the stacking length of the core 310, and FIGS. 27 to 29 are stacking lengths of the rotor core 310 according to another embodiment of the present invention. It is a conceptual diagram showing a state in which the key 325 is coupled to the key grooves 324 formed at different positions according to.
도 25을 참고하면, 전동기의 출력 증대를 위해 로터코어(310)의 적층길이가 최대로 증가될 때 회전축(300)에 로터코어(310)가 축방향으로 연장 가능하도록 회전축 연장부(305)를 더 구비할 수 있다.Referring to FIG. 25, when the stacking length of the rotor core 310 is increased to the maximum to increase the output of the electric motor, the rotary shaft extension part 305 is provided to the rotor core 310 to extend in the axial direction. It can be further provided.
회전축(300)에는 락 너트(304)의 체결을 위해 체결부(322)가 형성될 수 있다. 체결부(322)는 축방향이동제한돌기(303)로부터 축방향으로 이격 배치될 수 있다.A fastening part 322 may be formed on the rotating shaft 300 for fastening the lock nut 304. The fastening portion 322 may be arranged to be spaced axially from the axial movement limiting projection 303.
회전축 연장부(305)에 적어도 하나 이상의 체결부(322)가 더 형성되어, 로터코어(310)의 적층길이가 증가할 때 회전축 연장부(305)까지 연장된 로터코어(310)의 타단부에 밀착되게 락 너트(304)를 체결할 수 있다.At least one fastening portion 322 is further formed on the rotating shaft extension 305, and when the stacking length of the rotor core 310 increases, at the other end of the rotor core 310 extending to the rotating shaft extension 305 The lock nut 304 can be fastened in close contact.
도 26을 참고하면, 회전축(300)에 복수의 키홈(324)이 축방향으로 이격되게 형성될 수 있다. 복수의 키홈(324)에 키(325; key)가 선택적으로 끼움 결합될 수 있다.Referring to FIG. 26, a plurality of key grooves 324 may be formed on the rotating shaft 300 to be spaced apart in the axial direction. A key 325 may be selectively fitted to the plurality of key grooves 324.
이러한 구성에 의하면, 로터코어(310)의 적층길이가 증가할 때 로터코어(310)의 타단부에 밀착되게 키(325)를 키홈(324)에 끼움 결합하여, 로터코어(310)가 축방향으로 이동하는 것을 제한할 수 있다.According to this configuration, when the stacking length of the rotor core 310 increases, the key 325 is fitted into the key groove 324 to be in close contact with the other end of the rotor core 310, so that the rotor core 310 is axial. You can limit the movement.
도 27 내지 도 29를 참고하면, 회전축(300)에 형성된 키홈(324)이 다양한 위치에 형성될 수 있다.Referring to FIGS. 27 to 29, key grooves 324 formed on the rotation shaft 300 may be formed at various positions.
본 실시예에서는 락 너트(304)의 체결을 위한 체결부(322)가 회전축(300)의 일단부에서 로터코어(310)의 적층길이가 최소일 때 로터코어(310)의 타단부의 위치까지 연속해서 형성될 수 있다. 로터코어(310)의 타단부의 위치는 축방향이동제한돌기(303)로부터 로터코어(310)의 적층길이만큼 이격된 위치를 의미한다.In this embodiment, when the fastening portion 322 for fastening the lock nut 304 is at one end of the rotating shaft 300, the stacking length of the rotor core 310 is minimum to the position of the other end of the rotor core 310. It can be formed continuously. The position of the other end of the rotor core 310 means a position spaced apart by the stacking length of the rotor core 310 from the axial movement limiting projection 303.
도 27을 참고하면, 키홈(324)은 회전축(300)의 일단부에서 로터코어(310)의 적층길이가 최소일 때 로터코어(310)의 타단부의 위치까지 연속해서 형성될 수 있다.Referring to FIG. 27, the key groove 324 may be continuously formed from one end of the rotating shaft 300 to the position of the other end of the rotor core 310 when the stacking length of the rotor core 310 is minimal.
이러한 구성에 의하면, 로터코어(310)의 축방향 이동을 제한하기 위해 락 너트(304) 및 키(325)를 선택적으로 적용하거나 둘 다 적용할 수 있다. 예를 들어, 키홈(324)에 키(325)를 끼움 결합하여 로터코어(310)가 축방향으로 이동하는 것을 제한할 수 있다.According to this configuration, the lock nut 304 and the key 325 may be selectively applied or both may be applied to limit the axial movement of the rotor core 310. For example, it is possible to limit the movement of the rotor core 310 in the axial direction by fitting the key 325 to the key groove 324.
도 28을 참고하면, 키홈(324)의 위치가 도 27의 실시예와 다르다. 도 28에 도시된 키홈(324)은 도 27의 키홈(324)보다 길이가 짧고 회전축(300)의 일단부에 배치될 수 있다. 도 28의 키홈(324)은 로터코어(310)의 최소 적층길이가 도 27의 로터코어(310)의 최소 적층길이에 비해 더 길 경우에 적용될 수 있다.Referring to FIG. 28, the position of the keyway 324 is different from the embodiment of FIG. 27. The key groove 324 illustrated in FIG. 28 is shorter in length than the key groove 324 of FIG. 27 and may be disposed at one end of the rotation shaft 300. The keyway 324 of FIG. 28 may be applied when the minimum stacking length of the rotor core 310 is longer than the minimum stacking length of the rotor core 310 of FIG. 27.
도 29를 참고하면, 키홈(324)의 위치가 도 27의 실시예와 다르다. 도 29에 도시된 키홈(324)은 도 27의 키홈(324)보다 길이가 짧고 회전축(300)의 일단부와 축방향이동제한돌기(303) 사이에 배치될 수 있다. 도 29의 키홈(324)은 로터코어(310)의 최소 적층길이가 도 27의 로터코어(310)의 최소 적층길이에 비해 동일 내지 유사하고, 로터코어(310)의 최대 적층길이가 도 27의 로터코어(310)의 최대 적층길이에 비해 더 짧은 경우에 적용될 수 있다.Referring to FIG. 29, the position of the keyway 324 is different from the embodiment of FIG. 27. The key groove 324 illustrated in FIG. 29 is shorter than the key groove 324 of FIG. 27 and may be disposed between one end of the rotary shaft 300 and the axial movement limiting projection 303. The keyway 324 of FIG. 29 has the same minimum length as the minimum stacking length of the rotor core 310 compared to the minimum stacking length of the rotor core 310 of FIG. 27, and the maximum stacking length of the rotor core 310 is shown in FIG. It may be applied in a shorter case than the maximum stacking length of the rotor core 310.

Claims (20)

  1. 내부에 수용공간을 구비하는 모터 하우징;A motor housing having an accommodation space therein;
    상기 모터 하우징의 내부에 수용되고, 스테이터 코어와 상기 스테이터 코어에 권선되는 코일을 구비하는 스테이터;A stator accommodated inside the motor housing and having a stator core and a coil wound around the stator core;
    상기 스테이터 코어의 내부에 회전축을 중심으로 회전 가능하게 장착되는 로터;A rotor rotatably mounted inside the stator core about an axis of rotation;
    상기 모터 하우징의 양단부를 덮는 복수의 엔드커버;A plurality of end covers covering both ends of the motor housing;
    상기 복수의 엔드커버 각각의 내부에 형성되는 오일유로; 및An oil passage formed inside each of the plurality of end covers; And
    상기 복수의 엔드커버 각각의 내측면에 상기 오일유로와 연통되게 형성되고, 상기 수용공간으로 오일을 분사하는 복수의 노즐을 포함하는 전동기.An electric motor including a plurality of nozzles formed in communication with the oil passage on each inner surface of each of the plurality of end covers and spraying oil into the accommodation space.
  2. 제1항에 있어서,According to claim 1,
    상기 복수의 노즐은,The plurality of nozzles,
    상기 코일을 향해 축방향으로 연장되어, 상기 오일을 상기 코일로 분사하는 제1노즐을 포함하는 것을 특징으로 하는 전동기.And an electric motor extending in an axial direction toward the coil and including a first nozzle spraying the oil into the coil.
  3. 제1항에 있어서,According to claim 1,
    상기 복수의 노즐은,The plurality of nozzles,
    상기 로터를 향해 경사지게 연장되어, 상기 오일을 상기 로터로 분사하는 제2노즐을 포함하는 것을 특징으로 하는 전동기.And a second nozzle extending obliquely toward the rotor and spraying the oil to the rotor.
  4. 제1항에 있어서,According to claim 1,
    상기 모터 하우징은,The motor housing,
    원주방향으로 이격 배치되고, 상기 스테이터 코어가 압입되는 복수의 압입면; 및A plurality of press-fit faces spaced apart in the circumferential direction and press-fitted into the stator core; And
    상기 원주방향으로 인접하는 상기 복수의 압입면 사이에 오목하게 형성되는 복수의 오일분사영역부를 구비하는 것을 특징으로 하는 전동기.And a plurality of oil injection region portions concavely formed between the plurality of press-in faces adjacent in the circumferential direction.
  5. 제4항에 있어서,According to claim 4,
    상기 복수의 노즐은,The plurality of nozzles,
    상기 복수의 오일분사영역부를 향해 축방향으로 연장되어, 상기 오일을 상기 복수의 오일분사영역부에 분사하는 제3노즐을 포함하는 것을 특징으로 하는 전동기.And a third nozzle extending in the axial direction toward the plurality of oil injection region portions and spraying the oil to the plurality of oil injection region portions.
  6. 제4항에 있어서,According to claim 4,
    상기 모터 하우징은,The motor housing,
    상기 복수의 오일분사영역부 각각에 상기 압입면과 동일한 원주면 상으로 돌출 형성되어 상기 스테이터 코어와 접촉되는 복수의 돌출리브를 더 포함하는 것을 특징으로 하는 전동기.An electric motor further comprising a plurality of protruding ribs protruding on the same circumferential surface as the press-fitting surface in each of the plurality of oil injection area portions, and contacting the stator core.
  7. 제1항에 있어서,According to claim 1,
    상기 엔드커버는,The end cover,
    커버바디;Cover body;
    상기 커버바디의 내부에 원주방향을 따라 연장되어, 상기 오일유로를 형성하는 오일분배부; 및An oil distribution part extending in a circumferential direction inside the cover body to form the oil passage; And
    상기 오일분배부를 덮도록 상기 커버바디의 외측면에 장착되는 외측커버부를 포함하고,It includes an outer cover portion mounted to the outer surface of the cover body to cover the oil distribution portion,
    상기 복수의 노즐은, The plurality of nozzles,
    일측은 상기 오일분배부와 연통되고, 타측은 상기 커버바디에서 상기 수용공간으로 돌출되는 것을 특징으로 하는 전동기.One side is in communication with the oil distribution portion, the other side is an electric motor, characterized in that protrudes from the cover body to the receiving space.
  8. 제1항에 있어서,According to claim 1,
    상기 모터 하우징의 내부에 형성되는 오일유로를 더 포함하는 것을 특징으로 하는 전동기.An electric motor further comprising an oil passage formed inside the motor housing.
  9. 제8항에 있어서,The method of claim 8,
    상기 모터 하우징의 오일유로와 상기 엔드커버의 오일유로는 서로 연통되게 연결되는 것을 특징으로 하는 전동기.The oil passage of the motor housing and the oil passage of the end cover are electrically connected to each other.
  10. 제1항에 있어서,According to claim 1,
    상기 복수의 엔드커버 각각의 상부에 상기 엔드커버의 오일유로와 연통되게 형성되는 오일유입구; 및An oil inlet formed in communication with the oil passage of the end cover on each of the plurality of end covers; And
    상기 모터 하우징의 하부에 상기 수용공간과 연통되게 형성되는 오일유출구를 포함하는 것을 특징으로 하는 전동기.And an oil outlet formed in communication with the accommodation space under the motor housing.
  11. 제1항에 있어서,According to claim 1,
    상기 복수의 노즐은 360도 원주를 따라 이격 배치되는 것을 특징으로 하는 전동기.The plurality of nozzles are electric motors, characterized in that spaced apart along the circumference of 360 degrees.
  12. 제1항에 있어서,According to claim 1,
    상기 모터 하우징은,The motor housing,
    상기 스테이터 코어의 적층길이가 축방향으로 확장 가능하게 연장되는 연장부를 더 포함하는 것을 특징으로 하는 전동기.An electric motor further comprising an extension portion in which the stacking length of the stator core extends axially.
  13. 제12항에 있어서,The method of claim 12,
    상기 스테이터 코어의 적층길이에 따라 상기 복수의 노즐 각각에 결합되어, 상기 노즐의 길이를 연장하는 복수의 노즐연장부를 더 포함하는 것을 특징으로 하는 전동기.And a plurality of nozzle extensions coupled to each of the plurality of nozzles according to the stacking length of the stator core to extend the length of the nozzle.
  14. 제1항에 있어서,According to claim 1,
    상기 엔드커버의 내측면에서 축방향으로 돌출되는 베어링 수용부; 및A bearing accommodating portion protruding in the axial direction from the inner surface of the end cover; And
    상기 스테이터 코어의 적층길이에 따라 상기 베어링 수용부에 결합되어, 상기 베어링 수용부의 길이를 축방향으로 더 연장하는 베어링 연장부를 더 포함하는 것을 특징으로 하는 전동기.The electric motor further comprises a bearing extension portion coupled to the bearing accommodation portion according to the stacking length of the stator core, and further extending the length of the bearing accommodation portion in the axial direction.
  15. 제14항에 있어서,The method of claim 14,
    상기 베어링 수용부의 내부에 형성되는 베어링 오일유로;A bearing oil passage formed inside the bearing accommodating part;
    상기 베어링 연장부의 내부에 형성되는 베어링 연장 오일유로; 및A bearing extension oil passage formed inside the bearing extension; And
    상기 베어링 오일유로 또는 상기 베어링 연장 오일유로와 연통되게 연장되고, 상기 베어링을 향해 오일을 분사하는 복수의 베어링 노즐을 더 포함하는 것을 특징으로 하는 전동기.And a plurality of bearing nozzles extending in communication with the bearing oil passage or the bearing extending oil passage, and spraying oil toward the bearing.
  16. 제1항에 있어서,According to claim 1,
    상기 엔드커버는,The end cover,
    상기 오일유로의 내부에 원주방향으로 이격 배치되어, 상기 오일유로를 따라 흐르는 오일의 흐름을 방해하는 복수의 오일흐름 방해벽을 더 포함하고,Further arranged in the circumferential direction in the interior of the oil passage, further comprising a plurality of oil flow barriers to prevent the flow of oil flowing along the oil passage,
    상기 복수의 오일흐름 방해벽 각각은 원주방향으로 인접한 복수의 노즐 사이에 상기 오일유로의 폭방향으로 연장되는 것을 특징으로 하는 전동기.Each of the plurality of oil flow barriers, the electric motor characterized in that extending in the width direction of the oil passage between a plurality of nozzles adjacent in the circumferential direction.
  17. 제1항에 있어서,According to claim 1,
    상기 엔드커버는,The end cover,
    상기 오일유로의 내부에 똬리 형태로 복수 회 회전하며 연장되는 오일가이드벽을 더 포함하고, 상기 오일은 상기 오일가이드벽을 따라 상기 오일유로의 외측에서 내측방향으로 복수회로 회전 이동하고,The oil passage further includes an oil guide wall that extends and rotates a plurality of times inside the oil passage, and the oil rotates and rotates a plurality of times from the outside to the inside of the oil passage along the oil guide wall,
    상기 복수의 노즐은 반경방향으로 인접한 복수의 오일가이드벽 사이에 배치되고 원주방향으로 이격되는 것을 특징으로 하는 전동기.The plurality of nozzles are arranged between a plurality of oil guide walls adjacent in the radial direction and spaced apart in the circumferential direction.
  18. 제1항에 있어서,According to claim 1,
    상기 회전축에 체결되어, 상기 로터의 축방향 이동을 제한하는 체결부재를 더 포함하고,Fastened to the rotating shaft, further comprising a fastening member for limiting the axial movement of the rotor,
    상기 회전축은, The rotation axis,
    상기 로터의 적층길이에 따라 축방향으로 서로 이격 배치되며, 상기 체결부재가 체결되는 복수의 체결부를 더 포함하는 것을 특징으로 하는 전동기.Electric motors, which are arranged spaced apart from each other in the axial direction according to the stacking length of the rotor, further comprising a plurality of fastening parts to which the fastening member is fastened.
  19. 제18항에 있어서,The method of claim 18,
    상기 체결부재는 나사 체결되는 락 너트 및 끼움 결합되는 키(key) 중 적어도 하나이상을 포함하는 것을 특징으로 하는 전동기.The fastening member comprises at least one of a lock nut to be screwed and a key to be fitted.
  20. 제18항에 있어서,The method of claim 18,
    상기 체결부는 나사 체결을 위한 나사부 및 키의 끼움 결합을 위한 키홈 중 적어도 하나이상을 포함하는 것을 특징으로 하는 전동기.The fastening part comprises at least one of a screw groove for screw fastening and a key groove for fitting the key.
PCT/KR2018/016368 2018-12-20 2018-12-20 Motor WO2020130200A1 (en)

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CN113162332A (en) * 2021-04-09 2021-07-23 南京航空航天大学 Oil-cooled motor with overheat protection mechanism
CN113315291A (en) * 2021-06-04 2021-08-27 珠海格力电器股份有限公司 Casing subassembly and have its motor
US20230011641A1 (en) * 2021-07-06 2023-01-12 GM Global Technology Operations LLC Oleophilic surface treatments for enhanced heat-transfer characteristics of electric machines

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CN113162332A (en) * 2021-04-09 2021-07-23 南京航空航天大学 Oil-cooled motor with overheat protection mechanism
CN113162332B (en) * 2021-04-09 2022-10-11 南京航空航天大学 Oil-cooled motor with overheat protection mechanism
CN113315291A (en) * 2021-06-04 2021-08-27 珠海格力电器股份有限公司 Casing subassembly and have its motor
CN113315291B (en) * 2021-06-04 2022-09-27 珠海格力电器股份有限公司 Casing subassembly and have its motor
US20230011641A1 (en) * 2021-07-06 2023-01-12 GM Global Technology Operations LLC Oleophilic surface treatments for enhanced heat-transfer characteristics of electric machines
US11955852B2 (en) * 2021-07-06 2024-04-09 GM Global Technology Operations LLC Oleophilic surface treatments for enhanced heat-transfer characteristics of electric machines

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