CN117439323A - Motors and air compressors - Google Patents
Motors and air compressors Download PDFInfo
- Publication number
- CN117439323A CN117439323A CN202311646357.2A CN202311646357A CN117439323A CN 117439323 A CN117439323 A CN 117439323A CN 202311646357 A CN202311646357 A CN 202311646357A CN 117439323 A CN117439323 A CN 117439323A
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- motor
- channel
- cooling
- rear end
- front flange
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a motor and an air compressor, wherein the motor comprises: a housing; the front flange and the rear end cover are respectively arranged at the opposite ends of the shell so as to jointly enclose an installation space; the rotor and the stator are sleeved outside the rotor, and the rotor and the stator are both positioned in the installation space; the motor comprises a motor and a shell, wherein a first shell cooling channel for circulating a first cooling medium and a second shell cooling channel for circulating a second cooling medium are arranged on the shell at intervals, so that the problem that the heat dissipation efficiency of a heat dissipation mode of a motor of the air compressor in the prior art is low is solved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor and an air compressor.
Background
Screw air compressors are usually driven by a motor, and in the operation process, the higher the rotating speed, torque density and power density of the motor, the higher the heat generated by the motor, so that the heat dissipation and cooling structure of the motor is an essential setting for reliable, stable and efficient operation of the motor.
At present, the cooling modes of the motor can be divided into air cooling, water cooling and oil cooling, and the oil cooling motor becomes the first choice of a cooling scheme of the high-performance motor by virtue of the advantages of natural electric insulation, high freedom degree of structural design and the like, and the disadvantage of the oil cooling motor is that the price of oil is relatively high; the water-cooled motor has the advantages of high specific heat of the water medium, good heat transfer, cooling characteristics and economy, basically no noise, no explosion and toxicity risks, easy preparation and the like, and is widely applied because the water medium has high specific heat, good heat removal effect, good heat transfer, cooling characteristics and economy compared with oil, and the like.
The heat dissipation mode of the motor of the air compressor mainstream in the industry mostly adopts oil cooling, an oil inlet and an oil outlet are arranged outside a shell of the motor, the shell and an auxiliary system of the air compressor form a cooling loop together, and low-temperature lubricating oil which is cooled under the action of pressure difference flows in from the oil inlet of the shell during operation, flows out from the oil outlet after passing through a heat dissipation flow channel in the shell, so that heat generated by the motor is taken away. However, the heat dissipation efficiency of the heat dissipation mode for dissipating heat of the motor through only one heat dissipation flow channel is low, so that heat allowance accumulation generated by current in the working process of the motor is not easy to dissipate, and the temperature rise of the motor is too high, and even the phenomenon of motor burnout occurs.
Disclosure of Invention
The invention mainly aims to provide a motor and an air compressor, which are used for solving the problem of low heat dissipation efficiency of a heat dissipation mode of a motor of the air compressor in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electric motor comprising: a housing; the front flange and the rear end cover are respectively arranged at the opposite ends of the shell so as to jointly enclose an installation space; the rotor and the stator are sleeved outside the rotor, and the rotor and the stator are both positioned in the installation space; the shell is provided with a first shell cooling channel for circulating a first cooling medium and a second shell cooling channel for circulating a second cooling medium at intervals.
Further, the first housing cooling channel includes a first spiral flow channel disposed about an axis of the motor; the second housing cooling channel includes a second spiral flow channel disposed about an axis of the motor; wherein the first spiral flow passage is sleeved outside the second spiral flow passage.
Further, a rear end cover cooling channel is arranged on the rear end cover, an inlet of the rear end cover cooling channel is communicated with an outlet of the external cooling device, and an outlet of the rear end cover cooling channel is communicated with the installation space; the front flange is provided with a front flange cooling channel, an inlet of the front flange cooling channel is communicated with the installation space, and an outlet of the front flange cooling channel is communicated with an inlet of the external cooling device.
Further, the rotor comprises a rotor shaft and a rotor iron core sleeved on the rotor shaft, the rotor shaft is a hollow round shaft, and two ends of an inner hole of the rotor shaft are respectively communicated with an outlet of the rear end cover cooling channel and an inlet of the front flange cooling channel; and/or the stator comprises a stator core, a groove is arranged on the outer peripheral surface of the stator core, the groove and the shell jointly enclose a stator cooling flow passage, and two ends of the stator cooling flow passage are respectively communicated with an outlet of the rear end cover cooling passage and an inlet of the front flange cooling passage.
Further, the extending direction of the groove is parallel to the axis of the motor; and/or the number of the grooves is a plurality of grooves, and the grooves are arranged at intervals around the axis of the motor.
Further, the rotor comprises a bearing sleeved at one end of the rotor shaft close to the rear end cover; the rear end cover comprises an end cover body and a bearing installation part arranged on one side of the end cover body, which is close to the front flange; wherein, be provided with the bearing mounting groove that is used for installing the bearing on the bearing installation department, the rear end cap cooling channel sets up on the end cap body and communicates with the bearing mounting groove to communicate with the first end of the hole of rotor shaft through the bearing mounting groove.
Further, the rear end cover cooling channel comprises a first channel section and a second channel section which are communicated, wherein the first channel section is a first strip-shaped channel section extending along the radial direction of the rotor shaft, and the second channel section is a first annular channel section arranged around the axis of the motor; one end of the first channel section is a rear end cover inlet, and the other end of the first channel section is communicated with the bearing mounting groove to serve as a first rear end cover outlet; and a second rear end cover outlet is formed in one side of the second channel section, which is close to the front flange.
Further, the front flange includes a flange body and an annular flange disposed on a side of the flange body proximate to the rear end cap, and the front flange cooling passage is disposed on the flange body and communicates with an inner bore of the annular flange to communicate with a second end of the inner bore of the rotor shaft through the inner bore of the annular flange.
Further, the front flange cooling channel comprises a third channel section and a fourth channel section which are communicated, the third channel section is a second strip-shaped channel section which extends along the radial direction of the rotor shaft, and the fourth channel section is a second annular channel section which is arranged around the axis of the motor; one end of the third channel section is a front flange outlet, and the other end of the third channel section is communicated with an inner hole of the annular flange to serve as a first front flange inlet; and a second front flange inlet is formed in one side of the fourth channel section, which is close to the front flange.
According to another aspect of the present invention, there is provided an air compressor including the above motor, the air compressor further comprising: a cooler; the device comprises a first external cooling pipeline and a first liquid pump arranged on the first external cooling pipeline, wherein an inlet and an outlet of the first external cooling pipeline are respectively connected with an outlet and an inlet of a first shell cooling channel on a shell of the motor; the inlet and the outlet of the second external cooling pipeline are respectively connected with the outlet and the inlet of a second shell cooling channel on the shell of the motor; wherein the first external cooling pipe and the second external cooling pipe are arranged at intervals and both pass through the cooler.
By applying the technical scheme of the invention, the motor comprises: a housing; the front flange and the rear end cover are respectively arranged at the opposite ends of the shell so as to jointly enclose an installation space; the rotor and the stator are sleeved outside the rotor, and the rotor and the stator are both positioned in the installation space; the shell is provided with a first shell cooling channel for circulating a first cooling medium and a second shell cooling channel for circulating a second cooling medium at intervals. Therefore, the motor of the invention improves the heat dissipation efficiency of the motor by arranging the first shell cooling channel and the second shell cooling channel on the shell, effectively solves the problem of lower heat dissipation efficiency of the heat dissipation mode of the motor of the air compressor in the prior art, improves the power density of the motor, increases the current density of the motor, improves the working efficiency and the running stability of the motor, further improves the working efficiency of the air compressor with the motor of the invention, and realizes the purpose of energy conservation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a cross-sectional view of an embodiment of an electric machine according to the invention;
FIG. 2 illustrates a schematic flow of a first portion of the cooling fluid in the electric machine shown in FIG. 1;
FIG. 3 illustrates a schematic flow of a second portion of the cooling fluid in the electric machine shown in FIG. 1;
FIG. 4 shows a schematic structural view of the motor shown in FIG. 1;
FIG. 5 illustrates a bottom view of a front flange of the motor shown in FIG. 1;
FIG. 6 illustrates a top view of the rear end cap of the motor shown in FIG. 1;
FIG. 7 illustrates a front view of a rotor of the motor shown in FIG. 1;
fig. 8 shows a front view of the stator of the motor shown in fig. 1.
Wherein the above figures include the following reference numerals:
1. a housing; 11. a first housing cooling channel; 111. a first housing inlet; 112. a first housing outlet; 12. a second housing cooling channel; 121. a second housing inlet; 122. a second housing outlet;
2. a front flange; 21. a front flange cooling channel; 211. a third channel segment; 212. a fourth channel segment; 22. a front flange outlet; 23. a front flange inlet; 231. a first front flange inlet; 232. a second front flange inlet; 201. a flange body; 202. an annular flange;
3. a rear end cover; 31. a rear end cap cooling channel; 311. a first channel segment; 312. a second channel segment; 32. a rear end cap inlet; 33. an outlet of the rear end cover; 331. a first rear end cap outlet; 332. a second rear end cap outlet; 301. an end cap body; 302. a bearing mounting portion; 303. a bearing mounting groove;
4. a rotor; 41. a rotor shaft; 42. a rotor core; 43. a bearing;
5. a stator; 51. a stator core; 52. a groove; 53. a stator cooling flow path;
6. a machine head.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 8, the present invention provides an electric motor including: a housing 1; the front flange 2 and the rear end cover 3 are respectively arranged at two opposite ends of the shell 1 so as to jointly enclose an installation space; the rotor 4 and the stator 5 are sleeved outside the rotor 4, and the rotor 4 and the stator 5 are both positioned in the installation space; wherein, the shell 1 is provided with a first shell cooling channel 11 for circulating a first cooling medium and a second shell cooling channel 12 for circulating a second cooling medium at intervals.
In this way, the motor of the invention improves the heat dissipation efficiency of the motor by arranging the first shell cooling channel 11 and the second shell cooling channel 12 on the shell 1, effectively solves the problem of lower heat dissipation efficiency of the heat dissipation mode of the motor of the air compressor in the prior art, improves the power density of the motor, increases the current density of the motor, improves the working efficiency and the running stability of the motor, further improves the working efficiency of the air compressor with the motor of the invention, and realizes the purpose of energy conservation.
Specifically, the first cooling medium is water, the second cooling medium is oil, heat generated in the operation process of the motor firstly dissipates heat once through the oil in the second shell cooling channel 12, then the heat absorbed by the oil in the second shell cooling channel 12 is transferred to the water in the first shell cooling channel 11 to dissipate heat secondarily, so that the temperature rise of a stator of the motor is effectively reduced, the temperature resistance level required by an enameled wire is reduced, and the production cost of the motor is reduced.
The oil-cooled motor in the prior art has the advantages that the structure of the oil-cooled motor is mostly a single oil-cooled flow path, the sectional area of the flow path is large, the temperature of the interior and the surface of the motor is more than 100 ℃ under the common working condition, the temperature rise of the stator of the motor can be effectively reduced, enamelled wires and the like can be manufactured without using excessive high-grade raw materials, the copper loss is effectively reduced, and the production cost of the motor is reduced.
Specifically, the casing 1 is a stretching casing, has a simple structure and high reliability, and can effectively dissipate heat of the motor only by ensuring the tightness of the installation of the casing with the front flange 2 and the rear end cover 3 so that a cooling medium can enter and exit from a set flow path; wherein the first housing cooling passage 11 and the inlet and outlet are a first housing inlet 111 and a first housing outlet 112, respectively, the first housing inlet 111 and the first housing outlet 112 being provided on the outer peripheral surface of the housing 1 at intervals along the axial direction of the motor; the second casing cooling passage 12 and the inlet and outlet are a second casing inlet 121 and a second casing outlet 122, respectively, the second casing inlet 121 and the second casing outlet 122 being provided on the outer peripheral surface of the casing 1 at intervals in the axial direction of the motor.
As shown in fig. 1 to 3, the first housing cooling passage 11 includes a first spiral flow passage provided around the axis of the motor; the second housing cooling passage 12 includes a second spiral flow passage disposed around the axis of the motor; wherein the first spiral flow passage is sleeved outside the second spiral flow passage.
As shown in fig. 1 to 3, the rear end cover 3 is provided with a rear end cover cooling passage 31, an inlet of the rear end cover cooling passage 31 communicates with an outlet of the external cooling device, and an outlet of the rear end cover cooling passage 31 communicates with the installation space; the front flange 2 is provided with a front flange cooling channel 21, an inlet of the front flange cooling channel 21 is communicated with the installation space, and an outlet of the front flange cooling channel 21 is communicated with an inlet of an external cooling device.
As shown in fig. 1 to 3 and fig. 7 and 8, the rotor 4 comprises a rotor shaft 41 and a rotor iron core 42 sleeved on the rotor shaft 41, the rotor shaft 41 is a hollow round shaft, and two ends of an inner hole of the rotor shaft 41 are respectively communicated with an outlet of the rear end cover cooling channel 31 and an inlet of the front flange cooling channel 21; and/or the stator 5 comprises a stator core 51, a groove 52 is arranged on the outer peripheral surface of the stator core 51, the groove 52 and the shell 1 jointly enclose a stator cooling flow channel 53, and two ends of the stator cooling flow channel 53 are respectively communicated with the outlet of the rear end cover cooling channel 31 and the inlet of the front flange cooling channel 21.
Specifically, a part of the oil flowing out from the outlet of the rear end cover cooling channel 31 can pass through the inner hole of the rotor shaft 41 and then reach the inlet of the front flange cooling channel 21 so as to cool the rotor shaft 41 in the operation of the motor, thereby taking away the heat generated by the rotor 4 in the operation process, reducing the temperature rise of the rotor and avoiding the risk of demagnetization of the magnetic steel of the rotor due to overheat; another portion of the oil flowing out of the outlet of the rear end cap cooling passage 31 may pass through the stator cooling passage 53 to the inlet of the front flange cooling passage 21 to cool the stator core 51 during operation of the motor, thereby taking away heat generated during operation of the stator 5.
Preferably, the direction of extension of the recess 52 is parallel to the axis of the motor; and/or the number of grooves 52 is plural, the plurality of grooves 52 being spaced around the axis of the motor.
As shown in fig. 1 to 3 and fig. 6, the rotor 4 includes a bearing 43 fitted over one end of the rotor shaft 41 near the rear end cover 3; the rear end cover 3 includes an end cover body 301 and a bearing mounting portion 302 provided on a side of the end cover body 301 close to the front flange 2; wherein, bearing mounting portion 302 is provided with a bearing mounting groove 303 for mounting bearing 43, and rear end cap cooling passage 31 is provided on end cap body 301 and communicates with bearing mounting groove 303 to communicate with the first end of the inner bore of rotor shaft 41 through bearing mounting groove 303.
Specifically, the inlet of the rear end cap cooling channel 31 is a rear end cap inlet 32, the outlet of the rear end cap cooling channel 31 is a rear end cap outlet 33, and the rear end cap outlet 33 includes a first rear end cap outlet 331 and a plurality of second rear end cap outlets 332.
As shown in fig. 1 to 3 and 6, the rear end cap cooling passage 31 includes a first passage section 311 and a second passage section 312 that are communicated, the first passage section 311 being a first strip-shaped passage section extending in the radial direction of the rotor shaft 41, the second passage section 312 being a first annular passage section provided around the axis of the motor; wherein one end of the first channel section 311 is a rear end cover inlet 32, and the other end of the first channel section 311 is communicated with the bearing mounting groove 303 to serve as a first rear end cover outlet 331; the side of the second channel section 312 adjacent the front flange 2 is provided with a second rear end cap outlet 332.
Specifically, a part of the oil flowing out from the outlet of the rear end cover cooling channel 31 passes through the bearing mounting groove 303 before reaching the inner hole of the rotor shaft 41, so that the bearing mounting groove 303 can be lubricated, the friction loss of the bearing 43 is reduced, the service life of the bearing 43 is prolonged, the working efficiency of the motor is improved, and the service life of the bearing is prolonged.
As shown in fig. 1 to 3 and 5, the front flange 2 includes a flange body 201 and an annular flange 202 provided on a side of the flange body 201 near the rear end cover 3, and a front flange cooling passage 21 is provided on the flange body 201 and communicates with an inner hole of the annular flange 202 to communicate with a second end of the inner hole of the rotor shaft 41 through the inner hole of the annular flange 202.
Specifically, the outlet of the front flange cooling channel 21 is a front flange outlet 22, the inlet of the front flange cooling channel 21 is a front flange inlet 23, and the front flange inlet 23 includes a first front flange inlet 231 and a plurality of second front flange inlets 232.
As shown in fig. 1 to 3 and 5, the front flange cooling passage 21 includes a third passage section 211 and a fourth passage section 212 that are communicated, the third passage section 211 being a second strip-shaped passage section extending in the radial direction of the rotor shaft 41, the fourth passage section 212 being a second annular passage section provided around the axis of the motor; wherein one end of the third channel section 211 is a front flange outlet 22, and the other end of the third channel section 211 is communicated with the inner hole of the annular flange 202 to serve as a first front flange inlet 231; the side of the fourth channel section 212 adjacent to the front flange 2 is provided with a second front flange inlet 232.
The invention also provides an air compressor comprising the motor, and the air compressor further comprises: a cooler; the device comprises a first external cooling pipeline and a first liquid pump arranged on the first external cooling pipeline, wherein an inlet and an outlet of the first external cooling pipeline are respectively connected with an outlet and an inlet of a first shell cooling channel 11 on a shell 1 of the motor; the inlet and the outlet of the second external cooling pipeline are respectively connected with the outlet and the inlet of a second shell cooling channel 12 on the shell 1 of the motor; wherein the first external cooling pipe and the second external cooling pipe are arranged at intervals and both pass through the cooler.
In addition, the air compressor further includes a third external cooling pipe passing through the cooler and having an inlet and an outlet connected to the outlet of the rear end cover cooling passage 31 and the inlet of the front flange cooling passage 21, respectively, and a third liquid pump provided on the cooling pipe.
Specifically, the air compressor comprises a machine head 6 connected with a motor, and the cooler, the first liquid pump, the second liquid pump and the third liquid pump are all arranged in the machine head 6.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the motor of the present invention includes: a housing 1; the front flange 2 and the rear end cover 3 are respectively arranged at two opposite ends of the shell 1 so as to jointly enclose an installation space; the rotor 4 and the stator 5 are sleeved outside the rotor 4, and the rotor 4 and the stator 5 are both positioned in the installation space; wherein, the shell 1 is provided with a first shell cooling channel 11 for circulating a first cooling medium and a second shell cooling channel 12 for circulating a second cooling medium at intervals. In this way, the motor of the invention improves the heat dissipation efficiency of the motor by arranging the first shell cooling channel 11 and the second shell cooling channel 12 on the shell 1, effectively solves the problem of lower heat dissipation efficiency of the heat dissipation mode of the motor of the air compressor in the prior art, improves the power density of the motor, increases the current density of the motor, improves the working efficiency and the running stability of the motor, further improves the working efficiency of the air compressor with the motor of the invention, and realizes the purpose of energy conservation.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electric machine, comprising:
a housing (1);
the front flange (2) and the rear end cover (3) are respectively arranged at two opposite ends of the shell (1) so as to jointly enclose an installation space;
the rotor (4) and the stator (5), the stator (5) is sleeved outside the rotor (4), and the rotor (4) and the stator (5) are both positioned in the installation space;
the shell (1) is provided with a first shell cooling channel (11) for circulating a first cooling medium and a second shell cooling channel (12) for circulating a second cooling medium at intervals.
2. An electric machine according to claim 1, characterized in that,
the first housing cooling channel (11) comprises a first spiral flow channel arranged around the axis of the motor;
the second housing cooling channel (12) comprises a second spiral flow channel arranged around the axis of the motor;
wherein the first spiral flow passage is sleeved outside the second spiral flow passage.
3. An electric machine according to claim 1, characterized in that,
the rear end cover (3) is provided with a rear end cover cooling channel (31), an inlet of the rear end cover cooling channel (31) is communicated with an outlet of an external cooling device, and an outlet of the rear end cover cooling channel (31) is communicated with the installation space;
the front flange (2) is provided with a front flange cooling channel (21), an inlet of the front flange cooling channel (21) is communicated with the installation space, and an outlet of the front flange cooling channel (21) is communicated with an inlet of the external cooling device.
4. The motor of claim 3, wherein the motor is configured to control the motor,
the rotor (4) comprises a rotor shaft (41) and a rotor iron core (42) sleeved on the rotor shaft (41), the rotor shaft (41) is a hollow round shaft, and two ends of an inner hole of the rotor shaft (41) are respectively communicated with an outlet of the rear end cover cooling channel (31) and an inlet of the front flange cooling channel (21); and/or
The stator (5) comprises a stator core (51), a groove (52) is formed in the outer peripheral surface of the stator core (51), the groove (52) and the shell (1) jointly enclose a stator cooling flow channel (53), and two ends of the stator cooling flow channel (53) are respectively communicated with an outlet of the rear end cover cooling channel (31) and an inlet of the front flange cooling channel (21).
5. The motor of claim 4, wherein the motor is configured to control the motor to drive the motor,
-the direction of extension of the recess (52) is parallel to the axis of the motor; and/or
The number of the grooves (52) is a plurality, and the grooves (52) are arranged at intervals around the axis of the motor.
6. The motor of claim 4, wherein the motor is configured to control the motor to drive the motor,
the rotor (4) comprises a bearing (43) sleeved at one end of the rotor shaft (41) close to the rear end cover (3);
the rear end cover (3) comprises an end cover body (301) and a bearing mounting part (302) arranged on one side of the end cover body (301) close to the front flange (2);
wherein, be provided with on the bearing installation portion (302) and be used for installing bearing mounting groove (303) of bearing (43), rear end cover cooling channel (31) set up on the end cover body (301) and with bearing mounting groove (303) intercommunication is in order to pass through bearing mounting groove (303) with the first end of the hole of rotor shaft (41).
7. The electric machine according to claim 6, characterized in that the rear end cap cooling channel (31) comprises a first channel section (311) and a second channel section (312) in communication, the first channel section (311) being a first strip-shaped channel section extending in the radial direction of the rotor shaft (41), the second channel section (312) being a first annular channel section arranged around the axis of the electric machine; wherein,
one end of the first channel section (311) is a rear end cover inlet (32), and the other end of the first channel section (311) is communicated with the bearing mounting groove (303) to serve as a first rear end cover outlet (331);
a second rear end cap outlet (332) is arranged on the side of the second channel section (312) close to the front flange (2).
8. The electric machine according to claim 4, characterized in that the front flange (2) comprises a flange body (201) and an annular flange (202) arranged at a side of the flange body (201) close to the rear end cap (3), the front flange cooling channel (21) being arranged on the flange body (201) and communicating with the inner bore of the annular flange (202) for communicating with the second end of the inner bore of the rotor shaft (41) through the inner bore of the annular flange (202).
9. The electric machine according to claim 8, characterized in that the front flange cooling channel (21) comprises a third channel section (211) and a fourth channel section (212) in communication, the third channel section (211) being a second strip-shaped channel section extending in the radial direction of the rotor shaft (41), the fourth channel section (212) being a second annular channel section arranged around the axis of the electric machine; wherein,
one end of the third channel section (211) is a front flange outlet (22), and the other end of the third channel section (211) is communicated with an inner hole of the annular flange (202) to serve as a first front flange inlet (231);
a second front flange inlet (232) is arranged on the side, close to the front flange (2), of the fourth channel section (212).
10. An air compressor comprising the electric machine of any one of claims 1 to 9, the air compressor further comprising:
a cooler;
the motor comprises a first external cooling pipeline and a first liquid pump arranged on the first external cooling pipeline, wherein an inlet and an outlet of the first external cooling pipeline are respectively connected with an outlet and an inlet of a first shell cooling channel (11) on a shell (1) of the motor;
a second external cooling pipeline and a second liquid pump arranged on the second external cooling pipeline, wherein the inlet and the outlet of the second external cooling pipeline are respectively connected with the outlet and the inlet of a second shell cooling channel (12) on a shell (1) of the motor;
wherein the first and second external cooling pipes are disposed at intervals and both pass through the cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646357.2A CN117439323A (en) | 2023-11-30 | 2023-11-30 | Motors and air compressors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646357.2A CN117439323A (en) | 2023-11-30 | 2023-11-30 | Motors and air compressors |
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| CN117439323A true CN117439323A (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311646357.2A Pending CN117439323A (en) | 2023-11-30 | 2023-11-30 | Motors and air compressors |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211981635U (en) * | 2020-05-26 | 2020-11-20 | 烟台东德实业有限公司 | Integral binary channels motor casing |
| CN112234771A (en) * | 2020-09-16 | 2021-01-15 | 盖耀辉 | Oil cooling structure of traction motor |
| WO2022121549A1 (en) * | 2020-12-11 | 2022-06-16 | 合肥巨一动力系统有限公司 | Three-in-one oil cooling electric driving structure |
| CN217362759U (en) * | 2021-07-02 | 2022-09-02 | 明程电机技术（深圳）有限公司 | Novel oil-cooled motor |
| CN115276302A (en) * | 2022-08-26 | 2022-11-01 | 吉林大学 | Oil-cooled motor and overheating protection method thereof |
| CN221509290U (en) * | 2023-11-30 | 2024-08-09 | 珠海格力电器股份有限公司 | Motor and air compressor |
-
2023
- 2023-11-30 CN CN202311646357.2A patent/CN117439323A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211981635U (en) * | 2020-05-26 | 2020-11-20 | 烟台东德实业有限公司 | Integral binary channels motor casing |
| CN112234771A (en) * | 2020-09-16 | 2021-01-15 | 盖耀辉 | Oil cooling structure of traction motor |
| WO2022121549A1 (en) * | 2020-12-11 | 2022-06-16 | 合肥巨一动力系统有限公司 | Three-in-one oil cooling electric driving structure |
| CN217362759U (en) * | 2021-07-02 | 2022-09-02 | 明程电机技术（深圳）有限公司 | Novel oil-cooled motor |
| CN115276302A (en) * | 2022-08-26 | 2022-11-01 | 吉林大学 | Oil-cooled motor and overheating protection method thereof |
| CN221509290U (en) * | 2023-11-30 | 2024-08-09 | 珠海格力电器股份有限公司 | Motor and air compressor |
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