CN211456879U

CN211456879U - Motor cooling system

Info

Publication number: CN211456879U
Application number: CN201922462023.5U
Authority: CN
Inventors: 王健; 胡萌; 屈娅茹; 黄少锐; 张晗妮
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a motor cooling system, two tip of stator are located to first radome fairing and second radome fairing branch, and the whole stator of casing cladding is equipped with water conservancy diversion portion on the casing, forms in the water conservancy diversion passageway of first coolant import intercommunication, and the stator tooth all is provided with logical groove, through all letting in coolant in first radome fairing, second radome fairing, water conservancy diversion passageway and logical inslot, has reached the purpose of cooling down to the stator. In addition, a first rectification pressing plate and a second rectification pressing plate are respectively installed at two end portions of the rotor, a yoke portion through groove is formed in each rotor yoke portion of the rotor, cooling media are introduced into the first rectification pressing plate, the second rectification pressing plate and the yoke portion through grooves, and meanwhile the two end portions of the rotor and each rotor yoke portion of the rotor are cooled, so that the purpose of cooling the rotor is achieved. The stability of the overall performance of the motor is ensured, the reliability, the stability and the efficiency of the operation of the motor are further improved, and the reliable and stable operation of the automobile is ensured.

Description

Motor cooling system

Technical Field

The utility model relates to a vehicle field especially relates to a motor cooling system.

Background

Along with the continuous development of new energy automobile and the gradual promotion of market to new energy automobile's driving capability demand, synchronous machine for the new energy automobile drive need be under the prerequisite that the volume compressed gradually, need constantly improve the rotational speed of motor, torque density and power density, the rotational speed of motor, torque density and power density are higher, and the heat that its produced is also higher, consequently, the heat dissipation of motor and cooling structure are essential to the reliable stable high-efficient operation of motor.

The driving motor of the new energy automobile is mostly a permanent magnet synchronous motor, when the motor runs in a medium-low speed area, a stator component of the motor generates heat greatly, wherein main heat is generated by a stator winding and a stator; when the motor operates in a high-speed area, the heat generation of the rotor part of the motor is increased sharply. Therefore, if the stator part and the rotor part of the driving motor cannot be effectively cooled, the overall performance of the motor can be directly influenced, the reliability, the stability and the efficiency of the motor are lower, and the reliable and stable operation of the automobile is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem of cooling down of dispelling the heat to the driving motor cooling system among the prior art. Therefore, the utility model provides a motor cooling system, effectual cooling to driving motor cooling system has carried out the heat dissipation, has guaranteed motor cooling system's overall performance stability, has further improved reliability, stability and the efficiency of motor cooling system operation, ensures the reliable steady operation of car.

To solve the above problems, an embodiment of the present invention discloses a motor cooling system, including;

the stator is fixed in the shell, and the inner wall surface of the stator is provided with a plurality of stator teeth arranged at intervals along the circumferential direction of the stator. The motor cooling system further comprises a first fairing and a second fairing, wherein the first fairing is arranged at one end of the stator, and the second fairing is arranged at the other end of the stator;

the outer wall surface of the shell is provided with a first cooling medium inlet, and the inner peripheral wall of the shell is provided with a flow guide part to form a flow guide channel communicated with the first cooling medium inlet, so that the cooling medium from the first cooling medium inlet is respectively conveyed to the first fairing and the second fairing;

the first fairing is provided with a first nozzle, and the second fairing is provided with a second nozzle; a plurality of stator teeth are provided with through grooves, the through grooves extend from one end of each stator tooth to the other end of each stator tooth, one part of the through grooves of the stator teeth are used for conveying the cooling medium flowing into the first fairing to the second fairing and flowing out through the second nozzle, and the other part of the through grooves of the stator teeth are used for conveying the cooling medium flowing into the second fairing to the first fairing and flowing out through the first nozzle;

the first cooling medium inlet, the flow guide channel, the first fairing, the through groove of a part of the stator teeth and the second fairing are communicated in sequence to form a first stator cooling flow channel; the first cooling medium inlet, the flow guide channel, the second fairing, the through groove of the other part of the stator teeth and the first fairing are communicated in sequence to form a second stator cooling flow channel.

Adopt above-mentioned technical scheme, two tip of stator are located to first radome fairing and second radome fairing branch, and the inside of first radome fairing and second radome fairing leads to there is coolant, can cool down two tip of stator assembly, and the whole stator of casing cladding is equipped with water conservancy diversion portion on the casing, forms in the water conservancy diversion passageway of first coolant import intercommunication, and the expert has coolant in the water conservancy diversion portion, can cool down the outside of whole stator. The stator tooth all is provided with logical groove, and leads to the other end that the one end of groove follow stator tooth extends to the stator tooth, and the inside that leads to the groove also leads to there is coolant, can cool down each stator tooth of stator, and coolant finally sprays the mouth by first spraying and the discharge of second. Therefore, the cooling medium is introduced into the first fairing, the second fairing, the flow guide channel and the through groove, and the purpose of cooling the stator is achieved. The stability of the overall performance of the motor is ensured, the reliability, the stability and the efficiency of the operation of the motor are further improved, and the reliable and stable operation of the automobile is ensured.

Further, in an embodiment of the present invention, the diversion channel has a first cooling medium outlet and a second cooling medium outlet, the first cooling medium outlet is disposed at one end of the inner side wall of the housing and is communicated with the first fairing, the second cooling medium outlet is disposed at the other end of the inner side wall of the housing and is communicated with the second fairing, and the first cooling medium outlet and the second cooling medium outlet are used for respectively conveying the cooling medium to the first fairing and the second fairing;

the through grooves of one part of the stator teeth are defined as first through grooves, the through grooves of the other part of the stator teeth are defined as second through grooves, the first through grooves and the second through grooves are arranged in a staggered mode along the circumferential direction of the stator, each first through groove is connected with the first fairing and used for conveying the cooling medium flowing into the first fairing to the second fairing and flowing out through the second nozzle, and each second through groove is connected with the second fairing and used for conveying the cooling medium flowing into the second fairing to the first fairing and flowing out through the first nozzle.

Adopt above-mentioned technical scheme, first logical groove and second logical groove are along the crisscross setting of circumference of stator, and first logical groove will flow in the coolant of first radome fairing and carry to the second radome fairing and flow out through the second spout. The second through groove conveys the cooling medium flowing into the second fairing to the first fairing and flows out through the first nozzle. Thereby all cooled down to the lateral wall of stator tooth, the cooling effect is better.

Further, in an embodiment of the present invention, the first cooling medium inlet is disposed in the middle of the outer peripheral wall of the casing, penetrates through the peripheral wall of the casing, and is communicated with the diversion channel, and the diversion channel has a first cooling medium outlet communicated with the first cowling and a second cooling medium outlet communicated with the second cowling, respectively;

the flow guide part comprises a plurality of flow guide ribs which are convexly arranged on the outer wall surface of the shell and extend along the circumferential direction of the shell, and the plurality of flow guide ribs are arranged in parallel at intervals along the axial direction of the shell;

the flow guide passage includes: the two groups of flow guide branches are arranged on two sides of the first cooling medium inlet along the circumferential direction of the shell;

each group the water conservancy diversion branch road has a plurality of sprue, a plurality of first runners that connect in parallel and a plurality of second runners that connect in parallel, and is a plurality of the sprue is followed the axial interval of casing sets up, and each the sprue is followed the circumference of casing extends, and is a plurality of first runner and a plurality of second runner are followed the axial of casing sets up respectively in a plurality of the both sides of sprue, it is a plurality of the one end of sprue all with first cooling medium import intercommunication, the other end all with a plurality of the one end of first runner, a plurality of the one end intercommunication of second runner, it is a plurality of the other end of first runner with first cooling medium export intercommunication, it is a plurality of the other end of second runner with second cooling medium export intercommunication.

By adopting the technical scheme, two groups of flow guide branches are arranged in the circumferential direction of the shell, and each group of flow guide branches is provided with a plurality of main runners, a plurality of first branch runners connected in parallel and a plurality of second branch runners connected in parallel. Therefore, after the cooling medium is input through the first cooling medium inlet, the two groups of flow guide branches respectively conduct flow guide, and each group of flow guide branch comprises the main flow channel, the first branch flow channel and the second branch flow channel, so that the coverage area of the cooling medium flowing on the peripheral wall of the shell at the same time is increased, the flowing speed of the cooling medium on the peripheral wall of the whole shell is accelerated, and the cooling efficiency is improved.

Further, in the embodiment of the present invention, each of the first runners includes a plurality of first runners connected in series, the plurality of first runners are arranged along the axial direction of the housing, and each of the first runners is arranged along the circumferential direction of the housing and is adjacent to the circumferential direction of the housing.

By adopting the technical scheme, the flowing directions of the cooling media in the adjacent first flow channels are opposite, so that the cooling media cool the outer sides of the stators from different directions, and the cooling efficiency is further improved.

Further, in an embodiment of the present invention, the first fairing and the second fairing each include: the annular groove and the plurality of diversion trenches are arranged on the inner wall;

the annular groove is arranged around each flow guide groove and is connected with each flow guide groove, and each flow guide groove is arranged at intervals along the circumferential direction of the stator and is communicated with the corresponding first through groove or second through groove;

each flow guide groove in the first fairing is respectively connected with the corresponding first through groove and is used for conveying the cooling medium flowing into the annular groove from the flow guide channel to the first through groove;

each flow guide groove in the second fairing is respectively connected with the corresponding second through groove and is used for conveying the cooling medium flowing into the annular groove from the flow guide channel to the second through groove;

wherein a flow direction of the cooling medium in the first through groove is opposite to a flow direction of the cooling medium in the second through groove.

By adopting the technical scheme, the annular grooves are formed in the first fairing and the second fairing, so that the cooling medium flowing out of the flow guide channel is cached in the annular grooves, and then the uniform guide flow guide groove flows into the first through groove and the second through groove, so that the two end parts and the stator teeth of the stator are uniformly cooled.

Further, in an embodiment of the present invention, the first nozzle is disposed at a position opposite to the first fairing and the first winding of the end portion of the stator, and is configured to axially inject the cooling medium from the second fairing to the first winding;

the second nozzle is disposed at a position opposite to the second fairing and a second winding at the other end of the stator, and is used for axially spraying the cooling medium from the first fairing to the second winding.

By adopting the technical scheme, the cooling medium is sprayed to the first winding through the first nozzle and is sprayed to the second winding through the second nozzle, so that the first winding and the second winding are cooled, and the stability of the motor is further ensured.

Further, in an embodiment of the present invention, the motor cooling system further includes: the rotor, the first rectifying pressing plate and the second rectifying pressing plate;

the first rectifying pressure plate is arranged at one end of the rotor, and the second rectifying pressure plate is arranged at the other end of the rotor;

a second cooling medium inlet is formed in one end of the shell, a flow guide part is arranged in the rotor to form a flow guide pipeline communicated with the second cooling medium inlet, and the flow guide pipeline is used for conveying the cooling medium from the second cooling medium inlet to the first rectifying pressure plate and the second rectifying pressure plate respectively;

the first rectifying pressure plate is provided with third nozzles, the second rectifying pressure plate is provided with fourth nozzles, each rotor yoke of the rotor is respectively provided with a yoke through groove, each yoke through groove extends from one end of the rotor yoke to the other end of the rotor yoke, one part of the yoke through grooves are used for conveying the cooling medium flowing into the first rectifying pressure plate to the second rectifying pressure plate and flowing out through the fourth nozzles, and the other part of the yoke through grooves are used for conveying the cooling medium flowing into the second rectifying pressure plate to the first rectifying pressure plate and flowing out through the third nozzles;

the second cooling medium inlet, the drainage pipeline, the first rectification pressing plate and one part of the yoke part through groove are communicated with the second rectification pressing plate in sequence to form a first rotor cooling flow channel, and the second cooling medium inlet, the drainage pipeline, the second rectification pressing plate and the other part of the yoke part through groove are communicated with the first rectification pressing plate in sequence to form a second rotor cooling flow channel.

By adopting the technical scheme, the first rectifying pressing plate and the second rectifying pressing plate are respectively arranged at the two end parts of the rotor, and the cooling medium enters the first rectifying pressing plate and the second rectifying pressing plate through the second cooling medium inlet and the drainage pipeline, so that the two end parts of the rotor are cooled. And each rotor yoke of the rotor is provided with a yoke through groove, each yoke through groove extends from one end of the rotor yoke to the other end of the rotor yoke, one part of the yoke through grooves conveys the cooling medium flowing into the first rectifying pressing plate to the second rectifying pressing plate and sprays the cooling medium from the fourth nozzle, the other part of the yoke through grooves conveys the cooling medium flowing into the second rectifying pressing plate to the first rectifying pressing plate and sprays the cooling medium from the third nozzle, and therefore each rotor yoke of the rotor is cooled. Therefore, the scheme can cool the two end parts of the rotor and the yoke parts of the rotor simultaneously, and the purpose of cooling the rotor is achieved. The stability of the overall performance of the motor is ensured, the reliability, the stability and the efficiency of the operation of the motor are further improved, and the reliable and stable operation of the automobile is ensured.

Further, in an embodiment of the present invention, the drainage portion specifically includes:

a sealed liquid storage part for storing a cooling medium;

the cooling medium conveying component is provided with a liquid inlet hole, the area of the cooling medium conveying component, which is provided with the liquid inlet hole, is positioned in the cavity of the sealed liquid storage part, two end parts of the cooling medium conveying component extend out of the sealed liquid storage part, and one end part of the cooling medium conveying component is in butt joint with the hollow shaft and is used for conveying the cooling medium to the hollow shaft through the liquid inlet hole;

the hollow shaft is provided with a first liquid outlet hole and a second liquid outlet hole, the first liquid outlet hole is connected with the first rectifying pressing plate, and the second liquid outlet hole is connected with the second rectifying pressing plate;

and a sealing part is arranged on the peripheral wall of the cooling medium conveying part connected with the sealed liquid storage part.

By adopting the technical scheme, the cooling medium is conveyed to the inside of the rotor through the matching of the sealed liquid storage part, the cooling medium conveying part and the hollow shaft, and the sealing part is arranged at the connecting peripheral wall of the cooling medium conveying part and the sealed liquid storage part, so that the leakage of the cooling medium from the connecting peripheral wall of the cooling medium conveying part and the sealed liquid storage part is avoided, and the reliability of cooling the motor cooling system is improved.

Further, in an embodiment of the present invention, a part of the yoke through grooves is defined as a first yoke through groove, and another part of the yoke through grooves is defined as a second yoke through groove, which are respectively installed in each rotor yoke of the rotor, the first yoke through groove and the second yoke through groove are staggered, and a flow direction of the cooling medium in the first yoke through groove is opposite to a flow direction of the cooling medium in the second yoke through groove;

the first fairing platen includes:

a plurality of first liquid introduction flow channels which are arranged at equal intervals in the circumferential direction and are correspondingly communicated with the first liquid outlet holes and the first ends of the first yoke through grooves respectively, and are used for introducing a cooling medium from the second cooling medium inlet into the first rectification pressure plate;

a plurality of first liquid leading-out flow passages which are arranged at equal intervals in the circumferential direction, are correspondingly communicated with the second ends of the second yoke through grooves respectively, and are used for leading out the cooling medium from the second rectifying pressure plate conveyed through the second yoke through grooves and spraying the cooling medium out through the third nozzles;

the second rectification pressure plate comprises:

a plurality of second liquid introduction flow channels which are arranged at equal intervals in the circumferential direction and are correspondingly communicated with the second liquid outlet holes and the first ends of the plurality of second yoke through grooves respectively so as to introduce the cooling medium from the second cooling medium inlet into the second rectification pressure plate;

and a plurality of second liquid leading-out flow passages which are arranged at equal intervals in the circumferential direction, are correspondingly communicated with the second ends of the first yoke through grooves respectively, and are used for leading out the cooling medium from the first rectifying pressure plate conveyed through the first yoke through grooves and spraying the cooling medium out through the fourth nozzles.

Adopt above-mentioned technical scheme, first yoke portion lead to the groove with the crisscross setting in groove is led to the second yoke portion, thereby and the flow direction of the coolant in the logical inslot of first yoke portion and the flow direction of the coolant in the logical inslot of second yoke portion are opposite can carry out cooling from the orientation of difference to every utmost point rotor yoke portion of rotor, have promoted the efficiency and the cooling effect that carry out cooling to the rotor.

Further, in an embodiment of the present invention, the third nozzle is disposed at an outlet of the first liquid guiding-out flow passage, and is configured to inject the cooling medium from the second rectification pressure plate to the first winding of the stator;

the fourth nozzle is arranged at an outlet of the second liquid outlet flow channel and used for spraying the cooling medium from the first rectifying pressure plate to the second winding of the stator.

By adopting the technical scheme, the third nozzle sprays the cooling medium to the first winding of the stator, and the fourth nozzle sprays the cooling medium to the second winding of the stator, so that the first winding of the stator and the second winding of the rotor are cooled, and the stability of the motor is further improved.

Further, in an embodiment of the present invention, the motor cooling system further includes:

a first cooling medium discharge passage provided at one end portion of the housing and a second cooling medium discharge passage provided at the other end portion of the housing;

the first cooling medium discharge passage has a first discharge port penetrating the outside of the casing, is provided below the first nozzle hole and the third nozzle hole, and discharges the cooling medium ejected from the first nozzle hole and the second nozzle hole to the outside of the casing;

the second cooling medium discharge passage has a second discharge port penetrating the outside of the casing, is provided below the second nozzle hole and the fourth nozzle hole, and discharges the cooling medium discharged from the second nozzle hole and the fourth nozzle hole to the outside of the casing.

By adopting the technical scheme, the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are respectively discharged to the outside of the shell through the first cooling medium discharge channel and the second cooling medium discharge channel, so that the influence on the stability of the motor caused by the accumulation of the cooling medium in the shell is avoided.

Other features and corresponding advantages of the invention are set forth in the following part of the specification, and it is to be understood that at least some of the advantages become apparent from the description of the invention.

Drawings

Fig. 1 is a schematic cross-sectional view of a cooling system of an electric machine according to a first embodiment of the present invention;

fig. 2(a) is a front structural view of a housing of a cooling system of an electric machine according to a first embodiment of the present invention;

fig. 2(b) is a top view structural diagram of a housing of a cooling system of an electric machine according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first fairing and a second fairing of a cooling system of an electric machine according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a stator of a cooling system of an electric machine according to a first embodiment of the present invention;

fig. 5 is a schematic view of a partial cross-sectional structure of a cooling system of an electric machine according to a second embodiment of the present invention;

fig. 6 is a schematic cross-sectional structure view of a cooling medium flow direction structure of a cooling system of an electric machine according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first rectification pressing plate and a second rectification pressing plate of a motor cooling system according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a rotor of a motor cooling system according to a second embodiment of the present invention;

fig. 9 is a schematic view of the overall structure of a cooling system of an electric machine according to a second embodiment of the present invention.

Reference numerals:

1: a housing; 2: a stator; 20: stator teeth; 200: a through groove; 3: a first fairing; 30: a first nozzle; 31: a diversion trench; 32: an annular groove; 4: a second cowling; 10: a first cooling medium inlet; 11: a flow guide channel; 12: a second cooling medium inlet; 13: a drainage conduit; 14: a flow guide part; 5: a rotor; 50: a yoke through slot; 51: a drainage part; 510: sealing the liquid storage part; 511: a cooling medium conveying member; 5110: a liquid inlet hole; 512: a hollow shaft; 5120: a first liquid outlet hole; 5121: a second liquid outlet hole; 513: a sealing member; 6: a first rectification pressure plate; 60: a third nozzle; 61: a first liquid introduction flow path; 62: a first liquid lead-out flow path; 7: a second rectification pressing plate; 8: a first cooling medium discharge passage; 9: a second cooling medium discharge passage.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Example one

Fig. 1, fig. 2, fig. 3 and fig. 4 are combined to describe in detail a motor cooling system disclosed in the first embodiment of the present invention, fig. 1 is a schematic view of a cross-sectional structure of a motor cooling system disclosed in the first embodiment of the present invention, fig. 2(a) is a schematic view of a front view structure of a housing of a motor cooling system disclosed in the first embodiment of the present invention, fig. 2(b) is a schematic view of a top view structure of a housing of a motor cooling system disclosed in the first embodiment of the present invention, fig. 3 is a schematic view of a first fairing and a second fairing of a motor cooling system disclosed in the first embodiment of the present invention, and fig. 4 is a schematic view of a stator of a motor cooling system disclosed in the first embodiment of the present invention.

The utility model discloses a motor cooling system that first embodiment discloses, include: the motor cooling system further comprises a first fairing 3 and a second fairing 4, wherein the first fairing 3 is arranged at one end of the stator 2, and the second fairing 4 is arranged at the other end of the stator 2.

The outer wall surface of the casing 1 is provided with a first cooling medium inlet 10, and the inner peripheral wall of the casing 1 is provided with a flow guide portion 14 to form a flow guide passage 11 communicated with the first cooling medium inlet 10 for conveying the cooling medium from the first cooling medium inlet 10 to the first cowling 3 and the second cowling 4, respectively.

The first fairing 3 is provided with a first nozzle 30, the second fairing 4 is provided with a second nozzle (not shown in the figure), the plurality of stator teeth 20 are provided with through grooves 200, the through grooves 200 extend from one end of the stator teeth 20 to the other end of the stator teeth 20, the through grooves 200 of one part of the stator teeth 20 are used for conveying the cooling medium flowing into the first fairing to the second fairing 4 and spraying out through the second nozzle 30, and the through grooves 200 of the other part of the stator teeth 20 are used for conveying the cooling medium flowing into the second fairing 4 to the first fairing 3 and flowing out through the first nozzle 30.

The first cooling medium inlet 10, the flow guide channel 11, the first fairing 3, the through groove 200 of one part of the stator teeth 20 and the second fairing 4 are communicated in sequence to form a first stator cooling flow channel, and the first cooling medium inlet 10, the flow guide channel 11, the second fairing 4, the through groove 200 of the other part of the stator teeth 20 and the first fairing 3 are communicated in sequence to form a second stator cooling flow channel.

It should be noted that the first fairing 3 and the second fairing 4 are identical in structure, the reference numerals of the first fairing 3 and the second fairing 4 are shown as the reference numerals of the first fairing 3, and the structure of the second fairing 4 can be referred to the first fairing 3.

Specifically, as shown in fig. 1 and 2, the flow guide channel 11 may be a pipe protruding from an inner wall surface of the housing 1 to be in close contact with an outer side of the stator 2, the flow guide channel 11 has a cooling medium inlet and a cooling medium outlet communicated with the first cooling medium inlet 10, and the two cooling medium outlets respectively and correspondingly penetrate through the first fairing 3 and the second fairing 4. The first cooling medium inlet 10 may be provided in the middle of the outer wall surface of the casing 1, and the central axis of the first cooling medium inlet 10 is parallel to the central axis of the casing 1 or the central axis of the first cooling medium inlet 10 is perpendicular to the central axis of the casing 1.

In order to facilitate the uniform flowing of the cooling medium into the first fairing 3 and the second fairing 4, as an alternative embodiment of the present application, the first cooling medium inlet 10 is disposed in the middle of the outer peripheral wall of the casing 1 through the flow guiding portion 14, penetrates through the peripheral wall of the casing 1, and is communicated with the conducting flow channel 11, which may be welded, and the conducting flow channel 11 has a first cooling medium outlet communicated with the first fairing 3 and a second cooling medium outlet communicated with the second fairing 4 respectively.

The flow guiding portion 14 includes a plurality of flow guiding ribs protruding from the outer wall surface of the housing 1 and extending along the circumferential direction of the housing 1, and the plurality of flow guiding ribs are arranged in parallel along the axial direction of the housing 1 at intervals.

As shown in fig. 2(a) and 2(b), the conducting flow path 11 includes: two groups of flow guide branches are respectively arranged at two sides of the first cooling medium inlet 10 along the circumferential direction of the shell 1. Each group's water conservancy diversion branch road has a plurality of sprue of parallelly connected, parallelly connected a plurality of first sprue and parallelly connected second sprue, a plurality of sprue set up along casing 1's axial interval, and each sprue extends along casing 1's circumference, a plurality of first sprue and a plurality of second sprue set up respectively in a plurality of sprue's both sides along casing 1's axial, a plurality of sprue's one end all communicates with first cooling medium import 10, the other end all communicates with a plurality of first sprue's one end, a plurality of second sprue's one end intercommunication, a plurality of first sprue's the other end and first cooling medium export intercommunication, a plurality of second sprue's the other end and second cooling medium export intercommunication.

Furthermore, each first branch flow channel comprises a plurality of sections of first flow channels connected in series, the plurality of sections of first flow channels are arranged at intervals along the axial direction of the shell 1, each section of first flow channel extends along the circumferential direction of the shell 1, and the flowing directions of the cooling media in the two adjacent sections of second flow channels are opposite.

As shown in fig. 2(a) and 2(b), as an alternative embodiment of the present application, the guide passage 11 has a first cooling medium outlet provided at one end of the inner side wall of the casing 1 and communicating with the first cowling 3, and a second cooling medium outlet provided at the other end of the inner side wall of the casing 1 and communicating with the second cowling 4 for supplying the cooling medium to the first cowling 3 and the second cowling 4, respectively.

The through grooves 200 of a part of the stator teeth 20 are defined as first through grooves, the through grooves 200 of another part of the stator teeth 20 are defined as second through grooves, the first through grooves and the second through grooves are arranged in a staggered manner in the circumferential direction of the stator 2, each first through groove is connected with the first fairing 3 for conveying the cooling medium flowing into the first fairing 3 to the second fairing 4 and flowing out through the second nozzle, and each second through groove is connected with the second fairing 4 for conveying the cooling medium flowing into the second fairing 4 to the first fairing 3 and flowing out through the first nozzle 30.

Further, as shown in fig. 3, as an alternative embodiment of the present application, each of the first fairing 3 and the second fairing 4 includes: an annular groove 32 and a plurality of flow guide grooves 31 arranged on the inner wall. The annular groove 32 is disposed around each of the guiding grooves 31 and connected to each of the guiding grooves 31, each of the guiding grooves 31 is disposed at intervals along the circumferential direction of the stator 2 and is communicated with the corresponding first through groove or the corresponding second through groove, and each of the guiding grooves 31 in the first fairing 3 is connected to the corresponding first through groove for conveying the cooling medium flowing into the annular groove 32 from the guiding passage 11 to the first through groove.

The diversion trenches 31 in the second fairing 4 are respectively connected with the corresponding second through trenches for conveying the cooling medium flowing into the annular groove 32 from the diversion channel 11 to the second through trenches.

Wherein the flow direction of the cooling medium in the first through groove is opposite to the flow direction of the cooling medium in the second through groove.

Further, in order to cool down the windings provided at both end portions of the stator 2, first nozzle holes 30 are provided at positions opposite to the first fairing 3 and the first winding at one end portion of the stator 2 for injecting the cooling medium from the second fairing 4 to the first winding in the axial direction.

The second nozzle hole is provided at a position opposite to the second fairing 4 and the second winding of the other end portion of the stator 2, and is used for injecting the cooling medium from the first fairing 3 to the second winding in the axial direction.

Specifically, the first nozzle 30 is communicated with a liquid outlet of a second through groove connected with the second fairing 4, and the second nozzle is communicated with a liquid outlet of a first through groove connected with the first fairing 3. First spout 30 is adjacent and the interval setting with guiding gutter 31, and first spout 30 all link up rather than the second through-groove that corresponds mutually, and the second spout all link up rather than the first through-groove that corresponds mutually.

The following describes the operation of the motor cooling system disclosed in the embodiment of the present invention in detail with reference to fig. 1, fig. 2, fig. 3 and fig. 4 and the above description of the embodiment:

first, the first and second cowlings 3 and 4 are mounted on the two ends of the stator 2 with a gap of one stator tooth. The method comprises the following steps: the first fairing 3 is arranged at one end part of the stator 2, an annular groove 32 in the first fairing 3 is communicated with a first medium outlet, a diversion trench 31 in the first fairing 3 is communicated with a cooling medium inlet of a corresponding first through groove respectively, a first nozzle 30 in the first fairing 3 is communicated with a cooling medium outlet of a corresponding second through groove respectively, the second fairing 4 is arranged at the other end part of the stator 2, an annular groove in the second fairing 4 is communicated with a second medium outlet, a diversion trench 31 in the second fairing 4 is communicated with a cooling medium inlet of a corresponding second through groove respectively, and a second nozzle in the second fairing 4 is communicated with a cooling medium outlet of a corresponding first through groove respectively. After entering through the first cooling medium inlet 10, the cooling medium flows out through the diversion channel 11 to the first cooling medium outlet and the second cooling medium outlet to respectively flow out to the annular groove 31 of the first fairing 3 and the annular groove of the second fairing 4, the annular groove 32 in the first fairing 3 guides the cooling medium into the diversion groove 31 in the first fairing 3 and flows into the second fairing 4 through the first through groove, and the cooling medium is sprayed out to the second winding through the second nozzle 30 of the second fairing 4, so as to axially spray the second winding and the bearing at the second winding, the annular groove 32 in the second fairing 3 guides the cooling medium into the guiding gutter 31 in the second fairing 4 and into the first fairing 3 through the second through gutter, and is sprayed out to the first winding through the first nozzle 30 of the first fairing 3 to spray the first winding and the bearing at the first winding along the axial direction.

Wherein the direction of the arrows in the present embodiment and in the following embodiments represents the flow direction of the cooling medium.

The utility model discloses a motor cooling system that first embodiment discloses has following beneficial effect:

two tip of stator are located to first radome fairing and second radome fairing branch, and the inside of first radome fairing and second radome fairing leads to there is coolant, can cool down two tip of stator assembly, and the whole stator of casing cladding is equipped with water conservancy diversion portion on the casing, forms in the water conservancy diversion passageway of first coolant import intercommunication, and it has coolant to lead to in the water conservancy diversion portion, can cool down the outside of whole stator. The stator tooth all is provided with logical groove, and leads to the other end that the one end of groove follow stator tooth extends to the stator tooth, and the inside that leads to the groove also leads to there is coolant, can cool down each stator tooth of stator, and coolant finally sprays the mouth by first spraying and the discharge of second. Therefore, the cooling medium is introduced into the first fairing, the second fairing, the flow guide channel and the through groove, and the purpose of cooling the motor cooling system is achieved. The integral performance stability of the motor cooling system is ensured, the reliability, the stability and the efficiency of the operation of the motor cooling system are further improved, and the reliable and stable operation of the automobile is ensured.

Example two

Fig. 5, fig. 6, fig. 7, fig. 8 and fig. 9 are combined for illustration of a motor cooling system according to the second embodiment of the present invention, fig. 5 is a schematic view of a local sectional structure of a motor cooling system according to the second embodiment of the present invention, fig. 6 is a schematic view of a sectional structure of a cooling medium flow structure of a motor cooling system according to the second embodiment of the present invention, fig. 7 is a schematic view of a structure of a first rectification pressing plate and a second rectification pressing plate of a motor cooling system according to the second embodiment of the present invention, fig. 7 is a schematic view of a structure of a rotor according to the second embodiment of the present invention, and fig. 9 is a schematic view of an overall structure of a motor cooling system according to the second embodiment of the present invention.

The first and second straightening press plates 6 and 7 have the same structure, and the same reference numerals are used for the internal structures of the first and second straightening press plates 6 and 7.

As shown in fig. 9, on the basis of the above embodiment, the motor cooling system further includes: rotor 5, first fairing platen 6 and second fairing platen 7.

The first rectification pressure plate 6 is provided at one end of the rotor 5, and the second rectification pressure plate 7 is provided at the other end of the rotor 5.

One end part of the shell 1 is provided with a second cooling medium inlet 12, and the inside of the rotor 5 is provided with a flow guide part 51 to form a flow guide pipeline 13 communicated with the second cooling medium inlet 12 for conveying the cooling medium from the second cooling medium inlet 12 to the first rectifying pressure plate 6 and the second rectifying pressure plate 7 respectively.

The first straightening pressure plate 6 is provided with a third nozzle 60, the second straightening pressure plate 7 is provided with a fourth nozzle, each rotor yoke of the rotor 5 is respectively provided with a yoke through groove 50, each yoke through groove 50 extends from one end of the rotor yoke to the other end of the rotor yoke, one part of the yoke through grooves 50 is used for conveying the cooling medium flowing into the first straightening pressure plate 6 to the second straightening pressure plate 7 and flowing out through the fourth nozzle, and the other part of the yoke through grooves 50 is used for conveying the cooling medium flowing into the second straightening pressure plate 7 to the first straightening pressure plate 6 and flowing out through the third nozzle 60.

The second cooling medium inlet 12, the drainage pipeline 13, the first rectifying pressing plate 6, one part of yoke portion through groove 50 and the second rectifying pressing plate 7 are sequentially communicated to form a first rotor cooling flow channel, and the second cooling medium inlet 12, the drainage pipeline 13, the first rectifying pressing plate 6, the other part of yoke portion through groove 50 and the second rectifying pressing plate 7 are sequentially communicated to form a second rotor cooling flow channel.

Specifically, the first straightening pressure plate 6 and the second straightening pressure plate 7 are staggered by a yoke polar moment, so that the flow directions of the cooling mediums in the through grooves of adjacent yokes are opposite.

Specifically, as shown in fig. 5 and 6, the drainage portion 51 specifically includes:

and a sealed reservoir 510 for storing a cooling medium.

The cooling medium conveying component 511 is provided with a liquid inlet hole 5110, the area of the cooling medium conveying component 511, which is provided with the liquid inlet hole 5110, is located in the cavity of the sealed liquid storage part 510, the two end parts of the cooling medium conveying component 511 extend out of the sealed liquid storage part 510, and one end part of the cooling medium conveying component 511 is in butt joint with the hollow shaft 512 and is used for conveying the cooling medium to the hollow shaft 512 through the liquid inlet hole 5110.

The hollow shaft 512 has a first liquid outlet 5120 and a second liquid outlet 5121, the first liquid outlet 5120 is connected to the first rectifying pressing plate 6, and the second liquid outlet 5121 is connected to the second rectifying pressing plate 7.

A sealing member 513 is provided at a peripheral wall connecting the cooling medium feeding member 511 and the sealed liquid storage portion 510.

Specifically, the cooling medium delivery member 511 can rotate along with the rotor 5, and the sealing members 513 are respectively oppositely arranged at the connecting peripheral wall of the cooling medium delivery member 511 and the two ends of the sealed liquid storage part 510, so as to ensure that the cooling medium does not leak.

Further, as shown in fig. 8, a part of the yoke through grooves 50 is defined as a first yoke through groove, and the other part of the yoke through grooves 50 is defined as a second yoke through groove for corresponding to each rotor yoke mounted on the rotor 5, respectively, and the first yoke through groove and the second yoke through groove are adjacently disposed.

The first rectification pressure plate 6 includes:

a plurality of first liquid introduction flow passages 61 arranged at equal intervals in the circumferential direction are respectively in through connection with the first liquid outlet hole 5120 and the first ends of the plurality of first yoke through grooves, and are used for introducing the cooling medium from the second cooling medium inlet 12 into the first rectification pressure plate 6.

A plurality of first liquid lead-out flow passages 62 arranged at equal intervals in the circumferential direction are respectively in through connection with the second ends of the second yoke through grooves, and are used for leading out the cooling medium from the second rectification pressure plate 7 conveyed by the second yoke through grooves and ejecting the cooling medium through the third ejection ports 60.

The second rectification pressure plate 7 includes:

a plurality of second liquid introduction flow channels arranged at equal intervals in the circumferential direction are respectively in through connection with the second liquid outlet hole 5121 and the first ends of the plurality of second yoke through grooves so as to introduce the cooling medium from the second cooling medium inlet 12 into the second rectification pressure plate 7.

And a plurality of second liquid leading-out flow passages which are arranged at equal intervals in the circumferential direction are respectively in through connection with the second ends of the first yoke through grooves correspondingly and are used for leading out the cooling medium from the first rectifying pressing plate 6 conveyed through the first yoke through grooves and spraying the cooling medium out through the fourth nozzles.

Further, in order to cool down the first winding and the second winding of the rotor 5, as an alternative embodiment of the present invention, the third nozzle 60 is disposed at the outlet of the first liquid guiding flow channel, and is used for injecting the cooling medium from the second rectifying pressing plate 7 to the first winding of the stator 2.

And the fourth nozzle is arranged at the outlet of the second liquid outlet flow channel and is used for spraying the cooling medium from the first rectifying pressure plate 6 to the second winding of the stator 2.

Specifically, the third nozzle 60 and the fourth nozzle spray the cooling medium in the radial direction of the stator 2.

Further, in order to facilitate the removal of the cooling medium from the inside of the housing 1, as an alternative embodiment of the present invention, the motor cooling system further includes:

a first cooling medium discharge passage 8 and a second cooling medium discharge passage 9, the first cooling medium discharge passage 8 being provided at one end portion of the casing 1, the second cooling medium discharge passage 9 being provided at the other end portion of the casing 1.

The first cooling medium discharge passage 8 has a first discharge port penetrating the outside of the casing 1, and the cooling medium discharged from the first nozzle 30 and the third nozzle 60 is discharged to the outside of the casing 1.

The second cooling medium discharge passage 9 has a second discharge port penetrating the outside of the casing 1, is provided below the second nozzle and the fourth nozzle, and discharges the cooling medium discharged from the second nozzle and the fourth nozzle to the outside of the casing 1.

The utility model discloses a motor cooling system that embodiment of second discloses has following beneficial effect:

by adopting the technical scheme, the first rectifying pressing plate and the second rectifying pressing plate are respectively arranged at the two end parts of the rotor, and the cooling medium enters the first rectifying pressing plate and the second rectifying pressing plate through the second cooling medium inlet and the drainage pipeline, so that the two end parts of the rotor are cooled. And each rotor yoke of the rotor is provided with a yoke through groove, each yoke through groove extends from one end of the rotor yoke to the other end of the rotor yoke, one part of the yoke through grooves conveys the cooling medium flowing into the first rectifying pressing plate to the second rectifying pressing plate and sprays the cooling medium from the fourth nozzle, the other part of the yoke through grooves conveys the cooling medium flowing into the second rectifying pressing plate to the first rectifying pressing plate and sprays the cooling medium from the third nozzle, and therefore each rotor yoke of the rotor is cooled. Therefore, the scheme can cool the two end parts of the rotor and the yoke parts of the rotor simultaneously, and the purpose of cooling the motor cooling system is achieved. The integral performance stability of the motor cooling system is ensured, the reliability, the stability and the efficiency of the operation of the motor cooling system are further improved, and the reliable and stable operation of the automobile is ensured.

Adopt the utility model discloses embodiment adopts's technical scheme, stator and coolant's direct contact area increases substantially, and the first radome fairing and the second radome fairing of the outer disc of stator, tooth portion lead to groove, tip are inside to have all been full of coolant, make the stator thermal resistance reduce by a wide margin, and the temperature rise of stator reduces by a wide margin under the same operating mode.

Adopt the utility model discloses embodiment adopts's technical scheme, makes rotor and coolant direct contact, and rotor radiating mode takes place to matter and becomes, and the electromagnetic structure of rotor is not influenced hardly. Before direct cooling, the heat of the rotor must penetrate through the air gap to reach the stator, almost only heat resistance of convective heat transfer exists between the rotor and a cooling medium, the heat transfer path is greatly shortened, the temperature rise of the magnetic steel is greatly reduced, and the magnetic performance is remarkably improved.

Adopt the utility model discloses embodiment adopts's technical scheme, promotes motor cooling system's the regional cooling effect of tip, and the tip winding is all aimed at in the export of the spout of first fairing and second fairing, first rectification clamp plate and second rectification clamp plate, and during the actual operation, the tip winding receives axial and radial coolant and sprays, and for the motor cooling system of intracavity only air, the tip winding becomes the low temperature district from the highest hot district matter that is difficult to solve. Meanwhile, the cooling medium sprayed axially is brought to the bearing by the circulation in the cavity generated by the rotation of the rotor, so as to cool the bearing.

Adopt the utility model discloses embodiment adopts the technical scheme, and the cooling method that has adopted the cooling method of stator and rotor all adopts the design of axial crossing, and adjacent yoke portion leads to the groove, adjacent coolant reverse flow who leads to the groove, avoids producing the axial difference in temperature. In addition, under the same temperature rise limit, higher continuous power and peak power are output, the size can be reduced, the material consumption is reduced, the cost is reduced, and the heat dissipation capability is converted into the improvement of the power density.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A motor cooling system comprises a shell and a stator, wherein the stator is fixed in the shell, and the inner wall surface of the stator is provided with a plurality of stator teeth which are arranged along the circumferential direction of the stator at intervals;

2. The motor cooling system according to claim 1, wherein the flow guide passage has a first cooling medium outlet provided at one end of the inner side wall of the housing and communicating with the first cowling, and a second cooling medium outlet provided at the other end of the inner side wall of the housing and communicating with the second cowling, for supplying the cooling medium to the first cowling and the second cowling, respectively;

3. The motor cooling system according to claim 2, wherein the first cooling medium inlet is provided in a middle portion of the outer peripheral wall of the housing and penetrates the peripheral wall of the housing and communicates with the flow guide passage having a first cooling medium outlet communicating with the first cowling and a second cooling medium outlet communicating with the second cowling, respectively;

4. The motor cooling system according to claim 3, wherein each of the first branch flow passages includes a plurality of first flow passages connected in series, the plurality of first flow passages are spaced apart in an axial direction of the housing, each of the first flow passages extends in a circumferential direction of the housing, and flow directions of the cooling medium in adjacent two of the first flow passages are opposite.

5. The motor cooling system of claim 2, wherein the first and second fairings each comprise: the annular groove and the plurality of diversion trenches are arranged on the inner wall;

6. The motor cooling system according to claim 1, wherein the first nozzle hole is provided at a position opposite to the first cowling and the first winding of one of the end portions of the stator, and is configured to axially spray the cooling medium from the second cowling to the first winding;

7. The motor cooling system according to any one of claims 1 to 6, further comprising: the rotor, the first rectifying pressing plate and the second rectifying pressing plate;

8. The motor cooling system according to claim 7, wherein the drain portion specifically includes:

a sealed liquid storage part for storing a cooling medium;

9. The motor cooling system according to claim 8, wherein a part of the yoke through slots is defined as a first yoke through slot, and another part of the yoke through slots is defined as a second yoke through slot for corresponding to each rotor yoke mounted to the rotor, respectively, the first yoke through slot and the second yoke through slot are staggered, and a flow direction of the cooling medium in the first yoke through slot is opposite to a flow direction of the cooling medium in the second yoke through slot;

the first fairing platen includes:

the second rectification pressure plate comprises:

10. The motor cooling system according to claim 9, wherein the third nozzle is provided at an outlet of the first liquid discharge channel, and is configured to spray the cooling medium from the second rectification pressure plate to the first winding of the stator;

11. The motor cooling system of claim 7, further comprising: