CN116094203A

CN116094203A - Totally-enclosed motor

Info

Publication number: CN116094203A
Application number: CN202211740418.7A
Authority: CN
Inventors: 李祥成; 薛秀慧; 赵宇坤; 姜琛; 马千柱; 李世杰; 郭岚岚
Original assignee: CRRC Yongji Electric Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-09

Abstract

The invention provides a totally-enclosed motor, which relates to the field of electric appliances, and comprises: a housing; the stator core is positioned in the shell and is provided with spaced wire slots; the coil winding, the straight line section of the coil winding is located in the wire slot, the end of the coil winding stretches out of the wire slot; one part of the cooling pipeline is positioned in the wire groove and is in contact with the straight line segment, the other part of the cooling pipeline extends out of the wire groove and extends to a preset position, the part of the cooling pipeline is communicated with the other part, and the distance between the preset position and the end part of the coil winding is smaller than a preset distance threshold value; the end cooling piece can exchange heat with the other part of the cooling pipeline and conduct heat out of the shell. The totally-enclosed motor has better cooling effect and better thermal consistency.

Description

Totally-enclosed motor

Technical Field

The invention relates to the field of electric appliances, in particular to a totally-enclosed motor.

Background

In order to avoid the influence of ferromagnetic foreign matters entering the motor to the normal operation of the motor, the shell of the motor adopts a fully-closed structural form, and meanwhile, in order to reduce damage to parts of the motor caused by overheating of the motor in the operation process, heat generated by a stator and a coil winding of the motor is required to be exported to the shell of the motor and is carried away from the motor through the shell.

The related totally-enclosed motor is cooled by arranging water cooling in the shell of the motor, and the heat dissipation effect of the motor is poor.

Disclosure of Invention

The invention provides a totally-enclosed motor which is used for solving the technical problem of how to improve the heat dissipation effect of the totally-enclosed motor.

The embodiment of the invention provides a totally-enclosed motor, which comprises: a housing; the stator core is positioned in the shell and is provided with spaced wire slots; the linear section of the coil winding is positioned in the wire slot, and the end part of the coil winding extends out of the wire slot; a cooling pipeline, one part of which is positioned in the wire slot and is in contact with the straight line segment, the other part of which extends out of the wire slot and extends to a preset position, the part of which is communicated with the other part, and the distance between the preset position and the end part of the coil winding is smaller than a preset distance threshold value; and the end part cooling piece can exchange heat with the other part of the cooling pipeline and conduct heat out of the shell.

Further, along the length direction of the wire slot, the end cooling piece is positioned on at least one side of the stator core; the end cooler includes: a circulation line communicating with another portion of the cooling line; the liquid inlet pipe is communicated with the circulating pipeline; and the liquid outlet pipe is communicated with the circulating pipeline and is arranged at intervals with the liquid inlet pipe.

Further, the cooling line includes: the outer pipeline is at least partially positioned at the bottom of the wire groove and is in contact with the straight line section; the inner pipeline is at least partially positioned at the notch of the wire slot and is in contact with the straight line section; wherein the circulation pipeline is respectively communicated with the outer pipeline and the inner pipeline.

Further, the outer pipe includes a plurality of sub-outer pipes, each of the sub-outer pipes is arranged around the stator core, and the sub-outer pipe includes: the outer straight line segments are respectively positioned at the bottoms of the adjacent wire grooves and are respectively contacted with the straight line segments in the wire grooves; the outer end sections are respectively communicated with adjacent outer straight-line sections, the adjacent outer end sections are respectively positioned at two sides of the outer straight-line sections in the length direction, and at least one outer end section is communicated with the circulating pipeline; the inner pipeline includes a plurality of sub-inner pipelines, each sub-inner pipeline encircles the stator core is arranged, sub-inner pipeline includes: the inner straight line segments are respectively positioned at the notches of the adjacent wire grooves and are respectively contacted with the straight line segments in the wire grooves; the inner end sections are respectively communicated with adjacent inner straight line sections, the adjacent inner end sections are respectively positioned at two sides of the inner straight line sections in the length direction, and at least one inner end section is communicated with the circulating pipeline.

Further, a first groove wedge is arranged at the bottom of the wire groove, and the outer straight line section is positioned in the first groove wedge; the slot opening of the slot is provided with a second slot wedge, and the inner straight line section is positioned in the second slot wedge.

Further, the motor further includes: a first heat conducting member in contact with the end portions of the coil windings, with the outer end portions, with the inner end portions, and with the circulation line.

Further, the motor further includes: and a second heat conductive member contacting the end of the coil winding and contacting the case.

Further, the motor further includes: and a third heat conducting member contacting the stator core and contacting the casing.

Further, a shell cooling pipeline is arranged in the shell, and the circulating pipeline is communicated with the liquid outlet pipe and the shell cooling pipeline through the liquid inlet pipe.

Further, the casing includes: an inner case; the outer shell is sleeved outside the inner shell, and the shell cooling pipeline is formed between the outer shell and the inner shell at intervals; the outer surface of the inner shell is provided with a plurality of guide plates which are arranged at intervals, and the guide plates extend along a curve to form the cooling pipeline of the shell which extends along the curve.

The embodiment of the invention provides a totally-enclosed motor, which comprises a shell, a stator core, a coil assembly, a cooling pipeline and an end part cooling piece, wherein the stator core is positioned in the shell and provided with spaced wire slots, and the coil assembly is partially positioned in the wire slots. The coil winding is provided with a linear section and a coil assembly with an end part, the linear section of the coil winding is positioned in the wire groove, the end part of the coil winding extends out of the wire groove, one part of the cooling pipeline is in contact with a direct part positioned in the coil winding, the other part of the cooling pipeline is communicated with the part and extends to a position close to the end part of the coil winding, meanwhile, the end part cooling piece can exchange heat with the other part of the cooling pipeline and guide heat out of the shell; meanwhile, the cooling pipeline extends to a position close to the end part of the coil winding, and the straight-line section and the end part of the coil winding exchange heat with the end part cooling piece through the cooling pipeline, so that the straight-line section and the end part can be cooled to the same or similar degree, and the heat consistency of the straight-line section and the end part of the coil winding of the motor is improved.

Drawings

Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an assembly of a cooling circuit and an end cooling member in an electric machine according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a relative positional relationship among a linear section of a coil winding, an inner pipe and an outer pipe in a wire slot in a motor according to an embodiment of the present invention;

fig. 4 is an assembly schematic diagram of an inner straight line segment and an outer straight line segment and a wire slot in a motor according to an embodiment of the present invention;

fig. 5 is an assembly schematic diagram of a casing in a motor according to an embodiment of the present invention.

Description of the reference numerals

10. A housing; 11. a cooling pipeline in the shell; 12. a liquid inlet; 13. a liquid outlet; 14. an inner case; 15. a housing; 16. a deflector; 20. a stator core; 21. a wire slot; 22. a first slot wedge; 23. a second slot wedge; 30. a coil winding; 31. a straight line segment; 32. an end portion; 40. a cooling pipeline; 41. an outer pipe; 411. an external sub-pipeline; 412. an outer straight line segment; 413. an outer end section; 42. an inner pipe; 421. a sub-internal pipeline; 422. an inner straight line segment; 423. an inner end section; 50. an end cooling member; 51. a circulation line; 52. a liquid inlet pipe; 53. a liquid outlet pipe; 60. a first heat conductive member; 70. a second heat conductive member; 80. and a third heat conductive member.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the invention are not described in detail in order to avoid unnecessary repetition.

In the following description, references to the term "first/second/are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "coupled," unless specifically indicated otherwise, includes both direct and indirect coupling.

In the following detailed description, a fully enclosed motor may be applied to any scene and drive at least part of the movement of the required device, and illustratively, the fully enclosed motor may be applied to a lathe and drive the spindle of the lathe in rotational motion; the fully-enclosed motor can also be applied to a train for driving the train to travel along a railway line, and for convenience of explanation, the structure of the fully-enclosed motor will be exemplified below by using the fully-enclosed motor as an example of the application of the fully-enclosed motor to the train.

In some embodiments, as shown in fig. 1, a fully enclosed motor includes: the stator includes a housing 10, a stator core 20, a coil winding 30, a cooling circuit 40, and an end cooler 50. The casing 10 is provided with other parts such as a stator and a rotor for accommodating a totally enclosed motor, and meanwhile, the motor 0 is a totally enclosed casing, and it can be understood that the casing 10 has a certain sealing capability and can prevent foreign matters such as chips, dust or liquid drops from penetrating through the casing 10 to enter the accommodating cavity to a certain extent, and the sealing protection level of the casing 10 is at least IP54, namely, the dustproof level is 5, so that foreign matters are completely prevented from being invaded, dust invasion cannot be completely prevented, but the normal operation of a product cannot be influenced by the invasion dust amount, the waterproof level is 4, and water splashed in all directions is prevented from invading the electric appliance to cause damage. Optionally, the fully enclosed casing 10 includes a casing and two end caps, the casing has a receiving cavity therein, and two openings are provided at opposite ends of the casing, parts such as a stator and a rotor of a motor can be mounted in the receiving cavity through the two openings, then the two end caps are respectively connected with the casing to cover the two openings of the casing through the two end caps, and after mounting, the size of a gap between the casing and the cover can meet the sealing protection level requirement of the casing 10, and the two end caps are connected with the casing through bolts and have a sealing structure between the end caps and the casing.

The stator core 20 is any structure capable of increasing the magnetic flux of electromagnetic induction, and the stator core 20 is exemplified by a stator core formed by laminating a plurality of silicon steel sheets. The stator core 20 is located in the accommodating cavity of the casing 10, and along the circumferential direction of the stator core 20, the stator core 20 has a plurality of slots 21 arranged at intervals. The coil winding 30 includes a plurality of wires assembled with the stator core 20 through the wire slot 21, a portion of the coil winding 30 is located in the wire slot 21, a portion of the coil winding 30 located in the wire slot 21 is a straight line segment 31, and a portion of the coil winding 30 extending out of the wire slot 21 is an end portion 32, wherein an opening of the wire slot 21 faces an inside of the accommodating cavity, the stator core 20 is provided between the straight line segment 31 and the case 10 during operation of the motor, heat of the straight line segment 31 is difficult to be directly conducted to the case 10, if the coil winding 30 is directly cooled through the case 10, a cooling effect of the case 10 on the straight line segment 31 is caused, and meanwhile, a cooling capacity of the case 10 on the straight line segment 31 is different from a cooling capacity of the case 10 on the end portion 32, if the coil winding 30 is directly cooled through the case 10, and a thermal consistency of the straight line segment 31 and the end portion 32 of the coil winding 30 is also caused to be poor.

One part of the cooling pipeline 40 is positioned in the wire slot 21 and is in contact with the straight-line segment 31, and the other part extends out of the wire slot 21, and it can be understood that the cooling pipeline 40 extends out of the wire slot 21 from the inside of the wire slot 21, so that the straight-line segment 31 of the coil winding 30 in the wire slot 21 is led out through the cooling pipeline, and the cooling effect of the straight-line segment 31 of the coil winding 30 is improved; meanwhile, the other portion of the cooling pipe 40 extends to a preset position, and the distance between the preset position and the end portion 32 of the coil winding 30 is smaller than a preset distance threshold, which may be 3 mm, for example, and it is understood that the cooling pipe 40 exchanges heat with the end portion 32 of the coil winding 30 while guiding heat of the straight line segment 31 of the coil winding 30 out of the wire slot 21, that is, cools the straight line segment 31 and the end portion 32 of the coil winding 30 through the same cooling component at the same time, so that the straight line segment 31 and the end portion 32 of the coil winding 30 are cooled with the same or similar cooling degree, and thus the thermal consistency of the straight line segment 31 and the end portion 32 of the coil winding 30 is improved.

The end cooler 50 is capable of exchanging heat with another portion of the cooling circuit 40 and conducting heat out to the enclosure 10, i.e. the end cooler is capable of exchanging heat with a portion of the cooling circuit 40 extending to the end 32 adjacent to the coil winding 30, so that heat of the straight section 31 and the end 32 of the coil winding 30 is conducted to the enclosure 10 and dissipated by the enclosure 10 to the outside of the enclosure 10. It should be noted that the end cooling compartment 50 may be in heat exchange with the portion of the cooling duct 40 extending to the end portion near the coil winding 30 in any manner, for example, the end cooling member 50 is in contact with the cooling duct 40, and heat exchange is achieved by heat conduction with the cooling duct; for example, the end cooling element 50 is a circulation line, and the circulation line communicates with the cooling line 40, and heat exchange is achieved by heat convection between the cooling medium in the circulation line and the cooling medium in the cooling line 40.

In some embodiments, as shown in fig. 1, the end cooling member 50 is located on at least one side of the stator core 20 along the length direction of the wire slot 21, specifically, the stator core 20 has two opposite end surfaces and an annular side surface connecting the two end surfaces, the wire slot 21 penetrates the two end surfaces of the stator core 20, and the plurality of wire slots 21 are arranged at intervals on the annular side surface around the central axis of the stator core 20, the end cooling member 50 is located on one side of the stator core 20 or the end cooling member 50 is located on both sides of the stator core 20 along the length direction of the wire slot 21, so as to exchange heat with a portion of the cooling pipe 40 extending to the end 32 near the coil winding 30, and for convenience of description, the structure of the end cooling member 50 will be exemplified below taking the side of the end cooling member 50 located on the stator core 20 as an example. Illustratively, as shown in FIG. 2, the end cooler 50 includes: the circulation pipeline 51, the liquid inlet pipe 52 and the liquid outlet pipe 53, wherein the circulation pipeline 51 is communicated with the part of the cooling pipeline 40 extending to the end 32 close to the coil winding 30, so that heat exchange between the end cooling piece 50 and the cooling pipeline 40 is realized through heat convection between liquid in the circulation pipeline 51 and cooling liquid in the cooling pipeline 40; the liquid inlet pipe 52 is used for guiding external cooling liquid into the circulation pipeline 51, so that the temperature of the cooling liquid in the circulation pipeline 51 is reduced, and the cooling effect of the end part cooling piece 50 on the cooling pipeline 40 is improved; the liquid outlet pipe 53 is communicated with the circulation pipe 51, and is used for guiding the cooling liquid in the circulation pipe 51, which is subjected to heat exchange with the cooling pipe 40 and has an increased temperature, out of the circulation pipe 51, so that the cooling effect of the end cooling room 50 on the cooling pipe 40 is further improved. Wherein the liquid inlet pipe 52 and the liquid outlet pipe 53 can lead the cooling liquid into and out of the circulation pipeline in any mode, and optionally, the liquid inlet pipe 52 and the liquid outlet pipe 53 are communicated with the shell 10, and the cooling liquid is led into and out of the circulation pipeline 51 through the shell 10; alternatively, the liquid inlet pipe 52 and the liquid outlet pipe 53 are directly led out of the casing 10, and the cooling liquid is led into and out of the circulation pipe 51 through an external pump liquid structure.

In some embodiments, as shown in fig. 2, the cooling circuit 40 includes: an outer pipe 41 and an inner pipe 42, wherein the outer pipe 41 is at least partially positioned at the bottom of the slot 21 and is in contact with the straight line segment 31 of the coil winding 30, and the outer pipe 41 is used for guiding heat of the portion, close to the slot bottom, of the straight line segment 31 of the coil winding 30 in fig. 1 out of the slot 21 so as to cool the portion, close to the slot bottom, of the straight line segment 31; the inner pipe 42 is used for guiding heat of a portion of the linear segment 31 of the coil winding, which is close to the slot, out of the slot 21 to cool the portion of the linear segment 31, which is close to the slot, and it can be understood that the linear segment 31 of the at least one coil winding 30 fills a space in the slot 21 along the depth direction of the slot 21 to improve the working efficiency of the motor, that is, a portion of the linear segment 31 is close to the slot bottom of the slot 21, and another portion of the linear segment 31 is close to the slot bottom of the slot 21, and the heat of the portion of the linear segment 31, which is close to the slot and the portion, which is close to the slot bottom, can be guided out of the slot 21 by arranging the outer pipe 41, which is close to the slot bottom, and the inner pipe 42, which is close to the slot bottom, so as to further improve the cooling effect of the linear segment 31. Alternatively, as shown in fig. 3, the straight line segments 31 of the two coil windings 30 are arranged in the wire groove 21 at intervals along the depth direction of the wire groove 21, and a gasket 33 is arranged between the straight line segments 31 of the two coil windings 30, and the positions of the portions, close to the groove bottom, of the straight line segments 31 and the portions, close to the groove opening, of the straight line segments 31 can be adjusted by adjusting the thickness of the gasket 33, so that the portions, close to the groove bottom, of the straight line segments 31 can be in close contact with the outer pipeline 41, and the portions, close to the groove opening, of the straight line segments 31 can be in close contact with the inner pipeline 42, and the cooling effect on the coil windings 30 is further improved. Meanwhile, as shown in fig. 2, the outer pipe 41 and the inner pipe 42 are respectively communicated with the circulation pipe 51, it is understood that the outer pipe 41 and the inner pipe 42 are respectively extended to positions outside the wire groove 21 near the end portions 32 of the coil windings 30 and are respectively communicated with the circulation pipe 51, so that heat of the straight line segment 31 is guided out to the end portion cooling member 50 by heat convection with the cooling liquid in the circulation pipe 51 and is guided out of the casing 10 through the end portion cooling member 50.

In some embodiments, as shown in fig. 2, the outer pipe 41 includes a plurality of outer sub-pipes 411, each outer sub-pipe 411 is arranged around the stator core 20, the inner pipe 42 includes a plurality of inner sub-pipes 421, each inner sub-pipe 421 is arranged around the stator core 20, it may be understood that each straight line segment of the coil winding 30 sequentially passes through the wire slot 21 in fig. 1 to be arranged around the stator core 20, and the plurality of outer sub-pipes 411 and the plurality of inner sub-pipes 421 are arranged around the stator core 20 to cool each portion of the coil winding 30 arranged around the stator core 20, thereby further improving the cooling effect of the coil winding 30, and the structures of each outer sub-pipe 411 and the inner sub-pipe 421 will be specifically described below. The sub-external pipe 411 includes: a plurality of outer straight line segments 412 and a plurality of outer end segments 413, each outer straight line segment 412 being located at the bottom of the adjacent plurality of line slots 21 and being in contact with the portions of the straight line segments 31 of the coil windings 30 in the line slots 21 near the bottom of the slots, respectively, in fig. 1, so as to lead heat from the portions of the straight line segments 31 in each line slot 21 near the bottom of the slots out of the line slots 21, and simultaneously, the plurality of outer end segments 413 being respectively communicated with the adjacent outer straight line segments 411, while cooling the end portions 32 of the plurality of coil windings 30 arranged at intervals around the stator core 20, heat exchange between each adjacent outer straight line segments 411 can be realized, thereby further improving the thermal consistency of the portions of the coil windings 30 in each line slot 21 near the bottom of the slots; the sub-inner pipe 421 includes: the plurality of inner linear segments 422 and the plurality of inner end segments 423 are respectively positioned at the notches of the adjacent plurality of wire slots 21 and respectively contact with the portions, close to the notches, of the linear segments 31 of the coil windings 30 in each wire slot 21, so that heat of each linear segment 31 is led out of the wire slot, meanwhile, the plurality of inner end segments 423 are respectively communicated with the adjacent inner linear segments 422, and the heat exchange between the adjacent inner linear segments 422 can be realized while the ends 32 of the plurality of coil windings 30 distributed at intervals around the stator core 20 are cooled, so that the heat consistency of the portions, close to the notches, of the coil windings 30 of each wire slot 21 is further improved. Wherein adjacent outer end sections 413 are respectively located at two sides of the outer straight line section 412 in the length direction, at least one outer end section 413 is communicated with the circulation pipeline 51, and at least one outer end section 413 is communicated with the circulation pipeline; adjacent inner end sections 423 are respectively located at both sides of the inner straight line section 422 in the length direction, and at least one inner end section 423 communicates with the circulation line 51, it being understood that each of the sub-outer lines 411 communicates with the circulation line 51 through the outer end section 413, and each of the sub-inner lines 421 communicates with the circulation line 51 through the inner end section 423, thereby respectively achieving communication of each of the sub-outer lines 411 and each of the sub-inner lines 421 with the circulation line 51, so that heat of the sub-outer lines 411 and the sub-inner lines 421 is transferred to the circulation line 51 by thermal convection, respectively.

In some embodiments, as shown in fig. 4, the slot bottom of the slot 21 has a first slot wedge 22, the outer linear segment 412 is located in the first slot wedge 22, the slot opening of the slot 21 has a second slot wedge 23, and the inner linear segment 422 is located in the second slot wedge 23, where the slot wedge may be understood as a groove disposed on the inner sidewall of the slot 21, the groove is used to fix a component in the slot 21 and is used to limit the relative movement between the component in the slot 21 and the slot 21, and specifically, the first slot wedge 22 and the second slot wedge 23 are respectively used to fix the outer linear segment 412 of the outer sub-pipe 411 and the inner linear segment 422 of the inner sub-pipe 421, so as to respectively limit the relative movement between the outer linear segment 412 and the inner linear segment 422 and the slot 21, and further enable the linear segment 31 of the coil winding 30 in fig. 1 to be reliably contacted with the outer linear segment 412 and the inner linear segment 422 during the operation of the motor, thereby improving the reliability of cooling the outer pipe 41 and the inner pipe 42 on the linear segment 31.

In some embodiments, as shown in fig. 1, the motor further includes a first heat conductive member 60, the first heat conductive member 60 being in contact with the end 32 of the coil winding 30, the outer end section 413 of the outer pipe 41, the inner end section 423 of the inner pipe 42, and the circulation pipe 51, respectively, i.e., the first heat conductive member 60 being in contact with the end 32 of the coil winding 30, the outer end section 413, and the inner end section 423, respectively, so that heat of the end 32 of the coil winding 30 can be more sufficiently transferred to the outer end section 413 and the inner end section 423 through the first heat conductive member 60, improving

The cooling effect of the outer end section 413 and the inner end section 423 on the ends 32 of the coil winding 30; the first heat conducting member 60 contacts the end portion 32 of the coil winding 30 and the circulation line 51, respectively, and heat of the end portion 32 of the coil winding 30 can be directly transferred to the circulation line 51 through the first heat conducting member 60, thereby further improving the cooling effect of the end portion 32 of the coil winding 30; the first heat conductive member 60 contacts the outer end section 413, the inner end section 423, and the circulation line 51, respectively, and heat of the outer end section 413 and the inner end section 423 is transferred by heat convection

While being directly conducted to the circulation line 51, heat can be transferred to the circulation line 51 in the form of 0 by the first heat conductive member 60, thereby further improving the cooling effect of the end portions 32 of the coil winding 30. It should be noted that the first heat conducting member 60 is any material capable of transmitting heat, and the first heat conducting member 60 is illustratively a heat conducting glue with a high coefficient of heat conductivity, and the heat conducting member wraps the end 32, the outer end section 413, the inner end section 423 and the circulation line 51 of the coil winding 30 in a potting manner, thereby realizing

Now in contact with the ends 32 of the coil windings 30, the outer end sections 413, the inner end sections 423 and the contacts 5 of the circulation line 51.

In some embodiments, as shown in fig. 1, the motor further includes a second heat conductive member 70, the second heat conductive member 70 being in contact with the end portions 32 of the coil windings 30 and with the case 10, so that heat of the coil windings 30 can be transferred to the case 10 through the end cooling member 50 while also being directly transferred through the second heat conductive member 70

To the casing 10, thereby further improving the cooling effect of the coil winding 30, optionally, as shown in fig. 1, the second heat conducting member 70 is integrated with the first heat conducting member 60 to form an integral heat conducting member at the end of the stator core 20, which is exemplified as a heat conducting glue of a high heat conducting medium, and the heat conducting glue is simultaneously brought into contact with the end 32 of the coil winding 30, the outer straight line segment 412, the inner straight line segment 423, the circulation line 51 and the casing 10 by potting.

In some embodiments, as shown in fig. 1, the motor further includes a third heat conductive member 80, and the third heat conductive member 805 is in contact with the stator core 20 and in contact with the casing 10, thereby allowing heat of the stator core 20 to pass through the third heat conductive member

The heat member 80 is directly transferred to the casing 10, that is, a part of the heat of the coil winding 30 is directly transferred to the stator core 20, and the heat of the stator core 20 is transferred to the casing 10 through the third heat conductive member 80, thereby further improving the cooling effect of the stator core 20 on the coil winding 30.

In some embodiments, as shown in fig. 1, the cabinet 10 has a cabinet cooling line 11 therein, and the circulation line 51 in fig. 2 communicates with the cabinet cooling line 11 through a liquid inlet pipe 52 and a liquid outlet pipe 53, so that heat of the circulation line 51 is transferred to the cabinet 10 in the cabinet 10 by heat convection between the cooling liquid in the circulation line 51 and the cooling liquid in the cabinet cooling line 11, so that heat exchange between the cabinet 10 and the outside dissipates the heat to the outside of the cabinet 10. Optionally, as shown in fig. 5, the casing 10 further has a liquid inlet 12 and a liquid outlet 13, and the casing cooling pipeline 11 is communicated with the liquid inlet 12 and the liquid outlet 13, so that the cooling liquid absorbing the heat of the coil winding 30 and the stator core 20 can be discharged out of the casing 10 through the liquid outlet 13, and the cooling liquid with low temperature outside can be introduced into the casing cooling pipeline 11 through the liquid inlet 12, thereby leading the temperature in the casing 10 out of the casing 10.

In some embodiments, the casing cooling pipeline 11 in fig. 1 extends along a curve in the casing 10, so that the space in the casing 10 is fully utilized, the heat exchange area between the casing cooling pipeline 11 and the stator core 20 is increased, so that the stator core 20 can exchange heat with the casing cooling pipeline 11 more fully through the third heat conducting piece 80, the cooling effect on the stator core 20 and the coil windings 30 is further improved, and optionally, the casing cooling pipeline 11 extends in the casing 10 along a serpentine curve, so that the heat exchange area between the casing cooling pipeline 11 and the stator core 20 is increased; optionally, the casing cooling pipeline 11 may also extend along a spiral curve in the casing 10 around the axis of the casing 10, so as to increase the heat exchange area with the stator core 20. An exemplary configuration of forming a curved-extending cabinet cooling circuit within a cabinet is described below with reference to fig. 5, with cabinet 10 comprising: the inner shell 14 and the outer shell 15, the outer shell 15 is sleeved outside the inner shell 14, and a space between the outer shell 15 and the inner shell 14 forms a shell cooling pipeline 11, namely, a space between the inner shell 14 and the outer shell 15 forms the shell cooling pipeline 11 in fig. 1 for cooling liquid to flow, wherein a plurality of guide plates 16 are arranged at intervals on the outer surface of the inner shell 14, the guide plates 16 extend along a curve, so that a shell cooling pipeline 11 extending along the curve is formed, and a liquid inlet 12 and a liquid outlet 13 are positioned on the outer shell 15 and are respectively communicated with the shell cooling pipeline 11.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A totally enclosed motor, said motor comprising:

a housing;

the stator core is positioned in the shell and is provided with spaced wire slots;

the linear section of the coil winding is positioned in the wire slot, and the end part of the coil winding extends out of the wire slot;

a cooling pipeline, one part of which is positioned in the wire slot and is in contact with the straight line segment, the other part of which extends out of the wire slot and extends to a preset position, the part of which is communicated with the other part, and the distance between the preset position and the end part of the coil winding is smaller than a preset distance threshold value;

and the end part cooling piece can exchange heat with the other part of the cooling pipeline and conduct heat out of the shell.

2. The electric machine of claim 1, wherein the end cooling member is located on at least one side of the stator core along a length of the wire slot;

the end cooler includes:

a circulation line communicating with another portion of the cooling line;

the liquid inlet pipe is communicated with the circulating pipeline;

and the liquid outlet pipe is communicated with the circulating pipeline and is arranged at intervals with the liquid inlet pipe.

3. The electric machine of claim 2, wherein the cooling circuit comprises:

the outer pipeline is at least partially positioned at the bottom of the wire groove and is in contact with the straight line section;

the inner pipeline is at least partially positioned at the notch of the wire slot and is in contact with the straight line section;

wherein the circulation pipeline is respectively communicated with the outer pipeline and the inner pipeline.

4. A motor as claimed in claim 3, wherein the outer tube comprises a plurality of sub-outer tubes, each of the sub-outer tubes being arranged around the stator core, the sub-outer tubes comprising:

the outer straight line segments are respectively positioned at the bottoms of the adjacent wire grooves and are respectively contacted with the straight line segments in the wire grooves;

the outer end sections are respectively communicated with adjacent outer straight-line sections, the adjacent outer end sections are respectively positioned at two sides of the outer straight-line sections in the length direction, and at least one outer end section is communicated with the circulating pipeline;

the inner pipeline includes a plurality of sub-inner pipelines, each sub-inner pipeline encircles the stator core is arranged, sub-inner pipeline includes:

the inner straight line segments are respectively positioned at the notches of the adjacent wire grooves and are respectively contacted with the straight line segments in the wire grooves;

the inner end sections are respectively communicated with adjacent inner straight line sections, the adjacent inner end sections are respectively positioned at two sides of the inner straight line sections in the length direction, and at least one inner end section is communicated with the circulating pipeline.

5. The motor of claim 4 wherein the slot bottom of the slot has a first slot wedge, the outer linear segment being located within the first slot wedge; the slot opening of the slot is provided with a second slot wedge, and the inner straight line section is positioned in the second slot wedge.

6. The electric machine of claim 4, further comprising:

a first heat conducting member in contact with the end portions of the coil windings, with the outer end portions, with the inner end portions, and with the circulation line.

7. The electric machine of claim 4, further comprising:

and a second heat conductive member contacting the end of the coil winding and contacting the case.

8. The electric machine of claim 2 or 7, further comprising:

and a third heat conducting member contacting the stator core and contacting the casing.

9. The motor of claim 8, wherein a housing cooling line is provided in the housing, and the circulation line communicates with the housing cooling line through the liquid inlet pipe and the liquid outlet pipe.

10. The electric machine of claim 8, wherein the housing comprises:

an inner case;

the outer shell is sleeved outside the inner shell, and the shell cooling pipeline is formed between the outer shell and the inner shell at intervals;

the outer surface of the inner shell is provided with a plurality of guide plates which are arranged at intervals, and the guide plates extend along a curve to form the cooling pipeline of the shell which extends along the curve.