CN111277055A - Electric motor - Google Patents

Electric motor Download PDF

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Publication number
CN111277055A
CN111277055A CN201811472150.7A CN201811472150A CN111277055A CN 111277055 A CN111277055 A CN 111277055A CN 201811472150 A CN201811472150 A CN 201811472150A CN 111277055 A CN111277055 A CN 111277055A
Authority
CN
China
Prior art keywords
stator
motor
ribs
frame
rack
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201811472150.7A
Other languages
Chinese (zh)
Inventor
雷晓林
王全胜
靳宏杰
梁黎君
丁涛
陈记春
卫军娟
刘志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Yongji Electric Co Ltd
Original Assignee
CRRC Yongji Electric Co Ltd
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 CRRC Yongji Electric Co Ltd filed Critical CRRC Yongji Electric Co Ltd
Priority to CN201811472150.7A priority Critical patent/CN111277055A/en
Publication of CN111277055A publication Critical patent/CN111277055A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium

Abstract

The invention provides a motor, and relates to the technical field of motors. The invention provides a motor, comprising: a frame, a stator and a rotor; the stator is fixed in the frame and forms a stator air duct for heat dissipation with the frame; the stator is provided with a plurality of axial ribs extending along the axial direction of the stator at intervals along the radial direction, and the axial ribs are positioned in the stator air duct and used for connecting the rack and the stator; wherein, an arc rib matched with the shape of the frame is arranged between at least two adjacent axial ribs; the rotor is arranged in the stator; the air outlet is arranged at the transmission end of the frame, and the air inlet is arranged at the side surface of the non-transmission end of the frame. Therefore, the arc ribs are arranged between the two adjacent axial ribs in the stator air duct, so that cooling air which flows through the stator air duct can flow along the arc ribs to form turbulent flow by the arc ribs protruding out of the inner surface of the rack, heat of the stator is timely transmitted to the rack, and the heat is dissipated to the surrounding air through the rack, and further the heat dissipation efficiency of the motor is improved.

Description

Electric motor
Technical Field
The invention relates to the technical field of motors, in particular to a motor.
Background
The importance of electromechanical devices is self-evident to manufacturers of energy terminals for productivity in today's society. With the industrial demands, high-power motors are also widely used.
The existing motor includes: the stator is fixed in the frame and forms a gap with the frame, and the rotor is rotatably arranged in the stator. In order to radiate heat for the motor and ensure the normal work of the motor, an air inlet is formed in the side face of the non-transmission end of the frame, an air outlet is formed in the rear end cover of the transmission end of the frame, cooling air enters the motor from the air inlet, passes through gaps among the frame, the stator and the rotor and then flows out of the motor from the air outlet, and therefore heat inside the motor is taken away.
However, when cold air enters a gap between the stator and the frame, the heat of the stator cannot be effectively transferred to the frame, so that the heat dissipation efficiency of the stator is low, the heat dissipation of the motor is slow, and the normal work of the motor is affected.
Disclosure of Invention
The invention aims to provide a motor, which is used for solving the defects in the prior art, and the arc-shaped ribs are arranged between the axial ribs in the stator air duct, so that cooling air entering the stator air duct forms turbulent flow, and the turbulent flow cooling air is discharged out of the motor after being subjected to sufficient heat exchange with the stator and a frame, thereby improving the heat dissipation efficiency of the motor and effectively solving the problem of low heat dissipation efficiency of the existing motor in use.
The present invention provides a motor, including: a frame, a stator and a rotor;
the stator is fixed in the frame and forms a stator air duct for heat dissipation with the frame;
the stator is provided with a plurality of axial ribs extending along the axial direction of the stator at intervals along the radial direction, and the axial ribs are positioned in the stator air duct and used for connecting the rack and the stator;
arc ribs matched with the shape of the rack are arranged between at least two adjacent axial ribs;
the rotor is mounted within the stator;
the air outlet is arranged at the transmission end of the rack, and the air inlet is arranged on the side surface of the non-transmission end of the rack.
Optionally, the arc-shaped rib is arranged between all adjacent two of the axial ribs.
Optionally, two ends of the arc rib respectively extend to the two adjacent axial ribs.
Optionally, the arc-shaped ribs arranged between the two adjacent axial ribs are multiple, and the multiple arc-shaped ribs are arranged at intervals along the axial direction of the stator.
Optionally, the air outlet is disposed at a side of the transmission end of the frame.
Optionally, the number of the air outlets is two, and the two air outlets are respectively arranged on two opposite side surfaces of the transmission end of the rack.
Optionally, the two air outlets are symmetrically arranged.
Optionally, the rotor is provided with at least one circle of vent holes.
Optionally, the vent is provided at a position close to the axis of the rotor.
Optionally, a hoisting hole for hoisting the motor is arranged on the frame.
The invention provides a motor, and relates to the technical field of motors. The present invention proposes an electric motor comprising: a frame, a stator and a rotor; the stator is fixed in the frame and forms a stator air duct for heat dissipation with the frame; the stator is provided with a plurality of axial ribs extending along the axial direction of the stator at intervals along the radial direction, and the axial ribs are positioned in the stator air duct and used for connecting the rack and the stator; arc ribs matched with the shape of the rack are arranged between at least two adjacent axial ribs; the rotor is mounted within the stator; the air outlet is arranged at the transmission end of the rack, and the air inlet is arranged on the side surface of the non-transmission end of the rack. From this, through set up the arc muscle between two adjacent axial muscle in the stator wind channel to can flow along this arc muscle in order to form the turbulent flow in the cooling air in stator wind channel to the arc muscle of this protrusion in the frame internal surface, so that in time transmit the heat of stator for the frame and through the frame with the heat scatter and disappear to the air on every side, and then improve the radiating efficiency of motor.
Drawings
The above advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic front view of an electric motor according to an embodiment;
FIG. 2 is a schematic sectional (left view) view of a motor according to an embodiment;
fig. 3 is a schematic front view (half section) of a motor according to a second embodiment;
FIG. 4 is a schematic left-side view of a motor according to a second embodiment;
fig. 5 is a schematic top view of an electric motor according to a second embodiment;
fig. 6 is a schematic sectional (left view) structure diagram of a motor according to a second embodiment.
Reference numerals:
100: a frame; 101: a housing; 102: a base;
110: a stator air duct; 111: an axial rib; 112: an arc-shaped rib;
200: a stator; 201: a stator slot; 300: a rotor;
301: a rotor slot; 400: a rotating shaft; 401: a transmission end;
402: a non-transmission end; 1011: an air inlet; 1012: an air outlet;
1013: a junction box; 1014: a filtering baffle; 1015: hoisting holes;
500: an end cap; 501: an end cap through hole; 600: a bearing;
302: a vent hole; 700: cooling fan 800: and (4) a boss.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
It should be noted that the terms "upper", "lower", "bottom", "top", "front", "back", "left", "right", etc. in the description and claims of the present invention and the accompanying drawings indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Example one
Fig. 1 is a schematic front structural diagram of a motor provided in this embodiment. Fig. 2 is a schematic cross-sectional (left view) structural diagram of a motor provided in this embodiment. Referring to fig. 1-2, the motor provided in this embodiment includes: a frame 100, a stator 200, and a rotor 300; the stator 200 is fixed in the frame 100 and forms a stator air duct 110 with the frame 100 for heat dissipation; the stator 200 is provided with a plurality of axial ribs 111 extending along the axial direction of the stator 200 at intervals along the radial direction, and the axial ribs 111 are located in the stator air duct 110 and are used for connecting the rack 100 and the stator 200; arc ribs 112 matched with the shape of the rack are arranged between at least two adjacent axial ribs 111; the rotor 300 is installed in the stator 200; the transmission end 401 of the frame 100 is provided with an air outlet 112, and the side surface of the non-transmission end 402 of the frame 100 is provided with an air inlet.
Specifically, the housing 100 includes a housing 101 and a base 102, the housing 101 is used for mounting the stator 200, and the housing 101 mounts the motor on a designated motor mounting location, such as the floor or a countertop, through the base 102. Generally, the base 102 is mounted on the bottom surface of the housing 101, but may be mounted at other positions of the housing 101.
The housing 101 includes a front end surface and a rear end surface which are oppositely disposed, and a side wall which is located between the front end surface and the rear end surface and connects the two end surfaces. Specifically, the housing 101 may be a rectangular parallelepiped or cylindrical structure, for example, in some alternative embodiments, a structure that a square through hole perpendicular to a pair of parallel surfaces of a rectangular parallelepiped is opened between the parallel surfaces is adopted as the housing 101, the square through hole is used for installing the stator 200 of the motor, of course, the shape of the through hole may also be circular or other shapes, and generally, the shape of the through hole is adapted to the external shape of the stator 200 inside the motor.
Fig. 1 shows an alternative casing structure, which employs a structure in which a circular through hole is opened between both end faces of a cylinder perpendicular to the end faces as the casing 101, so that the side wall of the casing 101 and the cross section in the radial direction of the stator 200 installed in the through hole of the casing 101 are both circular. By adopting the circular side wall, the surface area of the casing 101 can be increased when the thickness of the side wall of the casing 101 is the same, so that the heat dissipation area of the stator 200 is enlarged when the stator 200 transfers the heat of the stator 200 to the casing 101, and the heat dissipation speed of the stator 200 is increased.
As shown in fig. 1, two bases 102 are disposed below the housing 101, and the bases 102 may be formed by bending a steel plate. Specifically, the base 102 includes a supporting portion for supporting the casing 101 and an installation portion fixedly connected to a bottom surface of the supporting portion, and the installation portion may be installed on the ground or a supporting table by a fastening member or welding. Alternatively, the mounting portion extends along the axial direction of the casing 101, and the supporting portion and the mounting portion are fixed at the middle portion of the mounting portion, forming a structure similar to an inverted "T". In the present embodiment, the support portion and the mounting portion form an obtuse angle therebetween, but may be a right angle in other examples. Furthermore, the two bases 102 may be arranged symmetrically with respect to the longitudinal axis y of the casing 101 as shown in fig. 1.
In this embodiment, the housing 101 and the base 102 may be of an integral or split structure. For example, in some alternative embodiments, the housing 101 may be coupled to the base 102 by fasteners, such as bolts, studs, and the like. As another example, in other embodiments, the casing 101 and the base 102 may be integrally formed by casting, and may be made of cast iron, for example. For example, referring to fig. 1, in the embodiment, the housing 101 and the base 102 are integrally formed by stretching a steel plate, so that the forming process is simple and the cost is reduced.
The stator 200 is fixed in the frame 100 and forms a stator air duct 110 with the frame 100 for heat dissipation; the stator 200 is provided with a plurality of axial ribs 111 extending along the axial direction of the stator 200 at intervals along the radial direction, and the axial ribs 111 are located in the stator air duct 110 and are used for connecting the frame 100 and the stator 200.
In this embodiment, the stator 200 may be formed by pressing a plurality of silicon steel sheets together, the plurality of silicon steel sheets may be pressed into a block structure, and the edge of the block structure may be fixed to the plurality of silicon steel sheets by a fastener such as a bolt, or may be fixed by welding. Similarly, the rotor 300 installed in the stator 200 may be formed using a silicon steel sheet similar to the stator 200. For example, in some alternative embodiments, the silicon steel sheet may have a rectangular shape with rounded corners, and a plurality of rectangular silicon steel sheets with rounded corners are laminated to form the stator 200. Of course, the shape of the silicon steel sheet may be other shapes, for example, referring to fig. 1, in the embodiment, a structure formed by laminating circular silicon steel sheets is adopted as the stator 200.
The stator 200 is provided with a plurality of axial ribs 111 extending along the axial direction of the stator 200 at intervals along the radial direction, and the axial ribs 111 are located in the stator air duct 110 and are used for connecting the frame 100 and the stator 200. For example, in the present embodiment, a plurality of axial ribs 111 are uniformly arranged on the circumference of the stator for connecting the frame 100 and the stator 200. Specifically, the axial rib 111 may be a strip-shaped or an arc-shaped plate-shaped structure, and one surface of the axial rib 111 connected to the casing 101 may be fixed on the inner wall of the casing 101 by welding or by a fastener. For example, in some alternative embodiments, a strip with a square cross section is used as the axial rib 111, the length of the strip is laid between the stator 200 and the casing 101 along the axial direction of the stator, one side of the strip is welded on the inner wall of the casing 101, and the opposite side of the strip is contacted with the stator 200 to realize the connection between the stator 200 and the frame 100. Optionally, the shape of the first connection surface of the axial rib 111 connected to the inner wall of the casing 101 matches the shape of the inner wall of the casing 101 to increase the contact area therebetween, thereby improving the heat dissipation effect. Similarly, the shape of the second connecting surface of the axial rib 111 connected with the outer wall of the stator 200 matches the shape of the outer wall of the stator 200, so as to increase the contact area between the two, thereby improving the heat dissipation effect.
The number of the axial ribs 111 is plural, for example, in the present embodiment, as shown in fig. 1, the number of the axial ribs 111 is four, and the axial ribs are uniformly arranged on the circumference of the stator 200, and the number of the axial ribs 111 is not particularly limited in this embodiment, and may be any suitable number of 2 or more. The length of the axial rib 111 in the axial direction of the stator 200 may be the same as or shorter than the length of the stator 200 in the axial direction. For example, in the present embodiment, the axial rib 111 has a length along the axial direction of the stator equal to the axial length of the stator 200, so that the contact length between the axial sidewall of the stator 200 and the axial rib 111 is the entire length of the stator 200, the area of the stator 200 for transferring heat to the rack 100 is increased, and the heat dissipation speed of the stator 200 is increased.
Specifically, an arc rib 112 matching the shape of the frame 100 is disposed between at least two adjacent axial ribs 111. For example, in the present embodiment, the arc rib 112 may be formed by bending a steel plate strip into a structure that is suitable for the arc of the inner wall of the casing 101, and the convex side (i.e. the outer side) of the steel plate strip may be fixed on the inner wall of the casing 101 by welding, a certain ventilation gap is reserved between the side (i.e. the inner side) opposite to the side where the steel plate strips protrude and the stator 200, cooling air enters the stator air duct 110 and then passes through the arc-shaped ribs 112, the flowing direction of the cooling air is changed, turbulent cooling air is formed, the turbulent cooling air is in full contact with the stator 200 and the rack 100 through collision, the speed of transferring heat of the stator 200 to the rack 100 is increased, the heat transferred to the rack 100 by the stator 200 is directly dissipated in the air through the outer surface of the rack 100, and the heat dissipation of the stator 200 is realized, meanwhile, the cooling air is changed into hot air after passing through the stator air duct 110, so that heat dissipation of the stator 200 and the rack 100 is realized.
Specifically, both ends of the arc rib 112 between two adjacent axial ribs 111 may be in contact with or spaced from the two adjacent axial ribs 111. For example, referring to fig. 1, in the present embodiment, there is a gap between two ends of the arc rib 112 and the axial ribs 111 at two sides of the arc rib 112, and the present embodiment is not particularly limited.
Further, in the present embodiment, the arc-shaped rib 112 may be disposed between all adjacent two of the axial ribs 111, that is, a plurality of arc-shaped ribs 112 may be disposed along the circumferential direction of the stator 200. For example, in the present embodiment, one arc rib 112 is disposed between every two adjacent axial ribs 111, please refer to fig. 1, that is, the number of the arc ribs 112 is four, so that the heat dissipation efficiency of the stator 200 along the circumferential direction can be improved.
The following further describes the arrangement of the arc ribs 111 by taking the example that four axial ribs 111 are uniformly arranged along the radial direction of the stator 200:
four axial ribs 111 evenly arranged along the radial direction of the stator 200 form four spaces for installing the arc ribs, only one of the four spaces for installing the arc ribs 111 can be provided with the arc ribs, and the arc ribs 111 can also be arranged in two, three or all four spaces.
In this embodiment, a gap between the stator 200 and the frame 100 serves as the stator air duct 110, the cooling air passes through the stator air duct 110 to dissipate heat of the stator 200, and meanwhile, the heat of the stator 200 is also transferred to the frame 100 through the axial ribs 111, and the heat is dissipated to the outside air through the outer surface of the frame 100 to dissipate the heat of the stator 200. Referring to fig. 1, in the present embodiment, the stator 200 adopts a structure with a circular cross-sectional area, and the stator 200 is provided with a stator notch 201 for installing a stator winding; rotor 300 is provided with rotor notch 301 for installing a rotor winding, stator 200 is provided with concentric circular rotor installation through hole, rotor 300 is installed in the through hole, and the axle center of rotor 300 is fixed on rotating shaft 400, and rotor 300 drives rotating shaft 400 under the effect of electromagnetic induction, so that required output power is provided for external equipment of the motor.
Specifically, an air inlet 1011 is formed in the side wall of the rack 100 at the non-transmission end 402 of the motor, and an air outlet 1012 is formed in the transmission end 401 of the motor, so that cooling air is guaranteed to enter from the non-transmission end 402 of the motor, and hot air formed after heat exchange with the inside of the motor is discharged from the transmission end 401 of the motor, and heat dissipation of the motor is achieved. Of course, in the present embodiment, as shown in fig. 2, the air inlet 1011 may be disposed on the top surface of the side wall of the rack at the driving end 401 of the motor, and the air outlet 1012 may be disposed on the side surface of the side wall of the rack 100 at the non-driving end 402 of the motor. The present embodiment is only an exemplary embodiment showing the relative positions of the air inlet 1011 and the air outlet 1012, and is not limited to any particular position. Specifically, the shapes of the air inlet 1011 and the air outlet 1012 may be circular or square, in this embodiment, please refer to fig. 2, the air outlet 1012 is circular, and the shapes of the air inlet 1011 and the air outlet 1012 are not particularly limited in this embodiment.
The invention provides a motor, comprising: a frame 100, a stator 200, and a rotor 300; the stator 200 is fixed in the frame 100, and a stator air duct 110 for heat dissipation is formed with the frame 100; the stator 200 is provided with a plurality of axial ribs 111 extending along the axial direction of the stator 200 at intervals along the radial direction, and the axial ribs 111 are located in the stator air duct 110 and are used for connecting the rack 100 and the stator 200; arc ribs 112 matched with the shape of the rack 100 are arranged between at least two adjacent axial ribs 111; the rotor 300 is installed in the stator 200; the transmission end 401 of the rack 100 is provided with an air outlet 1012, and the side surface of the non-transmission end 402 of the rack 100 is provided with an air inlet 1011. Therefore, the arc ribs 112 are arranged between the two adjacent axial ribs 111 in the stator air duct 110, the outer side of the arc ribs 112 is fixed to the rack 100, gaps exist between the inner side of the arc ribs 112 and the stator 200, cooling air entering the stator air duct 110 forms turbulent flow after passing through the arc ribs 112, turbulent cold air collides between the stator 200 and the rack 100 to enable the cold air and the stator 200 to be fully heat-exchanged between the rack 100, the speed of heat transfer of the stator 200 to the rack 100 is increased, the heat dissipation efficiency of the stator 200 is improved, the cold air passing through the stator air duct 110 is changed into hot air to be discharged out of the motor, the heat dissipation efficiency of the motor is improved, the normal work of the motor is guaranteed, and the service life of the motor is prolonged.
Example two
Fig. 3 is a schematic front view (half-section) structure diagram of an electric motor according to a second embodiment. Fig. 4 is a left side view structural diagram of a motor according to a second embodiment. Fig. 5 is a schematic top view of an electric motor according to a second embodiment. Fig. 6 is a schematic sectional (left view) structure diagram of a motor according to a second embodiment. Referring to fig. 3 to 6, the present embodiment provides a high power motor in combination with the above embodiments.
Specifically, in this embodiment, as shown in fig. 4, the side wall of the rack 100 may include: a top surface, a bottom surface, and left and right side surfaces between the top and bottom surfaces. With continued reference to fig. 4, optionally, bosses 800 are formed on the left and/or right sides to mount auxiliary components on the motor. It will be appreciated that the size and location of the boss 800 is determined by the location and size of other ancillary components on the chassis. For example, in the present embodiment, as shown in fig. 4, an inclined boss 800 is provided on a side wall (right side in fig. 4) of the frame 100, so as to reserve a mounting plane for mounting other components on the frame of the motor, and to facilitate mounting of the terminal box 1013 or the like on the frame 100 of the motor. In addition, in the present embodiment, the side wall of the frame 100 may be integrally formed. Alternatively, the casing 101 and the base 102 may be formed as a single piece by integral molding, for example, cast iron may be used to form a single piece, so as to simplify the process and reduce the cost.
Specifically, the air inlet 1011 is further provided with a cooling fan 700. In this embodiment, the air inlet 1011 is disposed on the upper surface of the side wall of the rack 100 at the non-transmission end 402 of the motor, so as to fix the cooling fan 700 directly above the motor rack 100, and the motor rack 100 supports the cooling fan 700, thereby increasing the reliability of the cooling fan 700 mounted on the rack 100.
Specifically, in the present embodiment, referring to fig. 6, the axial ribs 111 adopt eight strip plates extending along the axial direction of the stator, the eight strip plates are uniformly arranged in the stator air duct 110 along the radial direction of the stator to separate the stator air duct 110 into eight independent air ducts, and the cooling air respectively passes through the eight independent air ducts to flow to the transmission end 401 of the motor, so that the cooling air can uniformly flow through the outer surface of the stator 200 to cool the stator 200, thereby achieving uniform heat dissipation of the stator 200.
Further, two ends of the arc rib 112 between two adjacent axial ribs 111 respectively extend to the two adjacent axial ribs 111, that is, the arc rib 112 contacts with the two adjacent axial ribs 111. For example, in the present embodiment, a rectangular long steel bar is bent into an arc-shaped bar adapted to the radian of the inner wall of the rack 100 to serve as the arc rib 112, and the convex side of the arc-shaped steel bar is welded to the inner wall of the rack 100, referring to fig. 6, there is no gap between the two ends of the arc-shaped steel bar and the axial rib 111, so that the cooling air passing through the arc rib 112 forms a more severe turbulent flow, thereby enhancing the speed of heat exchange between the stator 200 and the rack 100 and improving the heat dissipation efficiency of the stator 200.
Further, a plurality of arc ribs 112 may be disposed between two adjacent axial ribs 111, and the plurality of arc ribs 112 are disposed at intervals along the axial direction of the stator 200. Referring to fig. 3, three arc ribs are arranged between two adjacent axial ribs 111, the three arc ribs 112 are arranged at intervals along the axial direction of the stator 200, and the number of the arc ribs 112 is increased between every two adjacent axial ribs 111, so that the cooling air in the stator air duct 110 forms more intense turbulent air, the heat exchange speed between the stator 200 and the rack 100 is increased, and the heat dissipation efficiency of the stator 200 is improved.
Further, two air outlets 1012 may be provided, which are respectively disposed on two opposite sides of the transmission end 401 of the rack 100. For example, in the embodiment, referring to fig. 3 to 5, two rectangular air outlets 1012 are symmetrically disposed on the vertical bosses 800 on the side walls of the two sides of the rack 100, and the rack 100 is directly provided with the air outlets 1012, so that the speed of hot air discharged out of the motor is increased by increasing the number of the air outlets 1012, thereby improving the heat dissipation efficiency of the motor. Further, the air outlet 1012 can be provided with a filtering baffle 1014, so that the situation that sundries outside the motor fall into the motor through the air outlet 1012 to cause blockage is avoided, and the heat dissipation effect of the motor is reduced.
Further, at least one circle of ventilation holes 302 can be formed in the rotor 300, that is, a plurality of through holes which are in a closed ring shape and penetrate through the rotor 300 along the axial direction are formed around the axis of the rotor 300, so that cooling air can penetrate through the ventilation holes 302 in the rotor 300 and the rotor 200 to be changed into hot air after heat exchange, and then is discharged out of the rotor ventilation holes 302, and the rotor 300 is independently cooled, and further the heat dissipation efficiency of the motor is improved. For example, in the present embodiment, referring to fig. 6, two circles of ventilation holes 302 are formed in the rotor 300, and the number of the ventilation holes 302 is increased to increase the heat exchange area between the rotor 300 and the cooling air, so as to increase the heat dissipation speed of the rotor 300. For example, in the present embodiment, referring to fig. 6, the shape of the ventilation hole 302 is a circle, and the cooling wind passes through the circular through hole to cool the rotor 300. Of course, the shape of the vent hole 302 may be a square or other polygon, and the embodiment is not particularly limited. Generally, the ventilation holes 302 are formed near the axis of the rotor 300 to avoid the increased heat generation of the motor caused by the magnetic saturation of the motor when the ventilation holes 302 are formed far away from the axis of the rotor 300, and in a serious case, the motor may be burnt due to excessive heat generation.
Further, a hoisting hole 1015 of the motor may be further disposed on the frame 100. For example, in the embodiment, referring to fig. 4 to 6, two hoisting holes 1015 are symmetrically arranged at the top of the rack 100, the mass of the large-scale motor is generally large, and the large-scale motor is convenient to transfer the position and mount and hoist by forming the hoisting holes 1015 on the rack 100.
Specifically, in this embodiment, referring to fig. 3, end covers 500 may be further installed at two ends (left and right ends shown in the figure) of the frame 100, and the end covers 500 may be detachably fixed at the two ends of the frame 100 by fasteners such as bolts or studs, so as to facilitate installation of components such as the stator 200 and the rotor 300 required in the motor. Meanwhile, an end cover through hole 501 is further formed in the middle of the end cover 500, and is used for the rotating shaft 400 to penetrate through the rack 100, for example, the rotating shaft 400 of the transmission end 401 penetrates through the end cover through hole 501 and the rack 100 to provide rotating force for a transmission device outside the motor.
Specifically, the shaft 400 and the end cap 500 support the shaft 400 through the bearing 600, and the shaft 400 may also be guided to rotate relative to the end cap 500. For example, in the present embodiment, referring to fig. 3, it is preferable that the bearing 600 is a rolling bearing, and the rolling bearing has a small heat generation amount and high transmission efficiency in the use process, so that the heat dissipation burden of the motor is reduced, and the transmission efficiency of the motor output rotating shaft 400 is also improved; meanwhile, the rolling bearing is standardized and generalized in use, and is convenient to use and maintain.
In the motor provided by the embodiment, the stator air duct 110 is divided into a plurality of air ducts by increasing the number of the axial ribs 111 in the stator air duct 110, cooling air enters the stator air duct 110 from the non-drive end 402 of the motor and then uniformly flows to the drive end 401 of the motor along the formed plurality of air ducts, so that the cooling air is ensured to uniformly flow through the outer surface of the stator 200 to cool the stator 200; by increasing the number of the arc ribs 112 between every two adjacent axial ribs 111, the cooling air in the stator air duct 110 forms more intense turbulent air, the speed of heat exchange between the stator 200 and the rack 100 is increased, and the heat dissipation efficiency of the stator 200 is improved; the two rectangular air outlets 1012 are symmetrically arranged on the side wall of the rack 100 in the vertical direction, and the air outlets 1012 are directly arranged on the rack 100, so that the air exhaust speed is increased by increasing the number of the air outlets 1012, and the heat dissipation efficiency of the motor is improved; the rotor 300 is provided with the rotor vent holes 302, so that the rotor 300 is independently radiated, and the radiating efficiency of the motor is improved; the hoisting hole 1015 is formed in the frame 100, which is beneficial to the transfer and hoisting of the large-scale motor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An electric motor, comprising: a frame, a stator and a rotor;
the stator is fixed in the frame and forms a stator air duct for heat dissipation with the frame;
the stator is provided with a plurality of axial ribs extending along the axial direction of the stator at intervals along the radial direction, and the axial ribs are positioned in the stator air duct and used for connecting the rack and the stator;
arc ribs matched with the shape of the rack are arranged between at least two adjacent axial ribs;
the rotor is mounted within the stator;
the air outlet is arranged at the transmission end of the rack, and the air inlet is arranged on the side surface of the non-transmission end of the rack.
2. The motor according to claim 1, wherein the arc-shaped ribs are provided between all adjacent two of the axial ribs.
3. The motor according to claim 1, wherein both ends of the arc-shaped rib extend to the adjacent two axial ribs, respectively.
4. The motor according to any one of claims 1 to 3, wherein a plurality of the arc-shaped ribs are provided between two adjacent axial ribs, and the plurality of the arc-shaped ribs are provided at intervals in an axial direction of the stator.
5. The motor according to any one of claims 1 to 3, wherein the air outlet is provided at a side of the driving end of the housing.
6. The motor of claim 5, wherein the two air outlets are respectively disposed on two opposite sides of the transmission end of the frame.
7. The motor of claim 6, wherein the two air outlets are symmetrically disposed.
8. The motor according to any one of claims 1 to 3, wherein the rotor is provided with at least one ring of ventilation holes.
9. The motor of claim 8, wherein the vent is disposed near an axis of the rotor.
10. The motor according to any one of claims 1 to 3, wherein a hoisting hole for hoisting the motor is provided on the frame.
CN201811472150.7A 2018-12-04 2018-12-04 Electric motor Pending CN111277055A (en)

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CN201811472150.7A CN111277055A (en) 2018-12-04 2018-12-04 Electric motor

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Application Number Priority Date Filing Date Title
CN201811472150.7A CN111277055A (en) 2018-12-04 2018-12-04 Electric motor

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CN111277055A true CN111277055A (en) 2020-06-12

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Application Number Title Priority Date Filing Date
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Country Link
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07264802A (en) * 1994-03-18 1995-10-13 Hitachi Ltd Induction motor
JP2008109817A (en) * 2006-10-27 2008-05-08 Nissan Motor Co Ltd Motor having concentrated windings
JP2012065493A (en) * 2010-09-17 2012-03-29 Mitsubishi Electric Corp Electric motor
JP2012213326A (en) * 2012-08-10 2012-11-01 Hitachi Koki Co Ltd Electric power tool
JP2014108009A (en) * 2012-11-29 2014-06-09 Toyota Industries Corp Rotary electric machine
CN205693488U (en) * 2016-06-27 2016-11-16 福建华电邵武发电有限公司 A kind of electromotor
CN107925304A (en) * 2015-07-24 2018-04-17 Lg电子株式会社 Motor and its manufacture method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07264802A (en) * 1994-03-18 1995-10-13 Hitachi Ltd Induction motor
JP2008109817A (en) * 2006-10-27 2008-05-08 Nissan Motor Co Ltd Motor having concentrated windings
JP2012065493A (en) * 2010-09-17 2012-03-29 Mitsubishi Electric Corp Electric motor
JP2012213326A (en) * 2012-08-10 2012-11-01 Hitachi Koki Co Ltd Electric power tool
JP2014108009A (en) * 2012-11-29 2014-06-09 Toyota Industries Corp Rotary electric machine
CN107925304A (en) * 2015-07-24 2018-04-17 Lg电子株式会社 Motor and its manufacture method
CN205693488U (en) * 2016-06-27 2016-11-16 福建华电邵武发电有限公司 A kind of electromotor

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