CN110868002A

CN110868002A - Novel integrated water cooling system of high-speed permanent magnet motor

Info

Publication number: CN110868002A
Application number: CN201911353021.0A
Authority: CN
Inventors: 王春彦; 马贤好; 尚栋; 饶靖
Original assignee: Suzhou Baobang Electric Co Ltd
Current assignee: Suzhou Baobang Electric Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-03-06

Abstract

The invention discloses a novel integrated water cooling system of a high-speed permanent magnet motor, which comprises a shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are arranged at two ends of the shell, and the novel integrated water cooling system is characterized in that: a first cooling cavity surrounding the whole shell is arranged in the shell wall of the shell, and a first guide plate is arranged in the first cooling cavity to form a first cooling water channel; the front end cover and the rear end cover are respectively internally provided with a second cooling cavity, a second guide plate is arranged in the second cooling cavity to form a second cooling water channel, the second cooling water channel is communicated with the first cooling water channel in the casing through connecting channels arranged in the front end cover, the rear end cover and the casing, and the side surfaces of the front end cover and the rear end cover are respectively provided with a cold medium inlet and a cold medium outlet which are communicated with the second cooling cavity. The invention integrally cools the casing and the end cover, enhances the cooling effect, greatly improves the running environment of the ball bearing, prolongs the running life of the bearing and increases the reliability of the motor.

Description

Novel integrated water cooling system of high-speed permanent magnet motor

Technical Field

The invention relates to a motor cooling device, in particular to a novel integrated water cooling system of a high-speed permanent magnet motor, and belongs to the technical field of motors.

Background

At present, a high-speed motor bearing mostly adopts a ceramic ball structure, and has the advantages that the sealing ceramic ball bearing structure is convenient to install and maintain, and the cost is lower than that of other high-speed bearings (such as an air bearing and a magnetic suspension bearing). The disadvantage is that the ceramic ball bearing has strict requirements on the operating temperature, and the aging of the bearing is accelerated by the overhigh temperature, even the bearing is damaged due to the precipitation of grease. The rotor of the high-speed motor generates heat very seriously, and because the rotor and the bearing are assembled in an interference manner, the heat of the rotor can be directly transferred to the bearing, so that the aging of the bearing is accelerated.

At present, a cooling device of a high-speed motor mostly adopts shell water cooling, and the shell water cooling can well cool a motor stator, but a bearing is difficult to cool. As shown in fig. 1, which is a sectional view of a conventional high-speed motor, the high-speed motor includes a housing 300, end caps 100 disposed at two ends of the housing, a stator 700 disposed in the housing 300, two ends of a rotor 600 mounted on the end caps 100 via bearings 800, and an air gap disposed between the rotor 600 and the stator 700, wherein a cooling system is disposed on the housing 300, a cooling water channel 500 is disposed in a wall of the cylindrical housing, and a water inlet 200 and a water outlet 400 are disposed on the housing 300 for the inlet and outlet of a cooling medium. Therefore, heat generated by the rotor 600 and transferred to the bearing 800 cannot be removed.

The existing bearing cooling also adopts a cooling system independently arranged on the end covers, therefore, the cooling systems arranged on the two end covers and the cooling system which can be arranged need to be provided with three groups of cooling medium inlets and outlets, and the shell needs to be connected in series by pipelines, so that the externally connected reducing parts are increased, and the loss of a water cooling system can be increased.

Disclosure of Invention

The invention aims to solve the problem that bearings of high-speed motors in the prior art are difficult to cool and are easy to damage.

The invention also aims to solve the problem that the series connection between the end cover and the shell cooling system of the existing motor needs a series pipeline, thereby increasing the loss of a water cooling system.

In order to solve the problems, the invention provides a novel integrated water cooling system of a high-speed permanent magnet motor, which comprises a shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are arranged at two ends of the shell, and the novel integrated water cooling system is characterized in that: a first cooling cavity surrounding the whole shell is arranged in the shell wall of the shell, and a first guide plate is arranged in the first cooling cavity to form a first cooling water channel; the front end cover and the rear end cover are respectively internally provided with a second cooling cavity, a second guide plate is arranged in the second cooling cavity to form a second cooling water channel, the second cooling water channel is communicated with the first cooling water channel in the casing through connecting channels arranged in the front end cover, the rear end cover and the casing, and the side surfaces of the front end cover and the rear end cover are respectively provided with a cold medium inlet and a cold medium outlet which are communicated with the second cooling cavity.

The novel integrated water cooling system of the high-speed permanent magnet motor is a preferred scheme, wherein two protruding connecting parts are arranged on the outer edges of the two ends of the shell, and the connecting channel comprises a shell connecting channel arranged in the connecting parts and end cover connecting channels arranged in the front end cover and the rear end cover; the shell connecting channel comprises a first hole vertical to the end face of the shell and a second hole located at the tail end of the first hole and used for being communicated with one end of the first cooling cavity; the end cover connecting channel comprises a third hole and a fourth hole, the third hole is perpendicular to the end face of the end cover and is in butt joint with the first hole, and the fourth hole is located at the tail end of the third hole and is communicated with the second cooling cavity.

The novel integrated water cooling system of the high-speed permanent magnet motor is a preferable scheme, wherein the first guide plate arranged in the first cooling cavity is a spiral plate, so that a spiral first cooling water channel is formed; or the first guide plates are a plurality of linear first guide plates, the linear first guide plates are parallel to the axis of the shell and are arranged in the first cooling cavity at intervals, one end of each linear first guide plate is provided with a guide opening in the first cooling cavity, and the guide openings of the adjacent linear first guide plates are respectively positioned at two ends of the cooling cavity, so that a zigzag first cooling water channel is formed.

The novel integrated water cooling system of the high-speed permanent magnet motor is a preferable scheme, wherein the machine shell can be welded together by two sleeves, namely the machine shell comprises an inner water jacket and an outer water jacket, a protruding outer flange ring is arranged at the fixed end part of the inner water jacket, and an inner flange ring extending inwards and radially is arranged at the fixed end part of the outer water jacket; the inner water jacket and the outer water jacket are spliced together, the free end of the inner water jacket and the free end of the outer water jacket are respectively welded with the inner flange ring and the outer flange ring, an annular first cooling cavity is formed between the inner water jacket and the outer water jacket, and the first guide plate is arranged on the outer circular surface of the inner water jacket or the inner circular surface of the outer water jacket.

Or, the casing is formed by casting integrally, and the first guide plate is formed in the first cooling cavity by casting.

The novel integrated water cooling system of the high-speed permanent magnet motor is a preferred scheme, wherein the front end cover and the rear end cover are both disc-shaped, and the inner ends of the front end cover and the rear end cover are provided with annular convex spigot ports matched with a shell; the front end cover and the rear end cover respectively comprise a disc-shaped front plate, an inner hole matched with the bearing is formed in the center of the front plate, a concave ring spigot is formed in one side, close to the motor cavity, of the front plate, and an annular second cooling cavity is formed by extending towards the front plate body along the end face of the concave ring spigot; and a rear plate welded with the front plate is arranged at the notch of the concave ring so as to seal the second cooling cavity.

Or the front end cover and the rear end cover are both disc-shaped, and the inner ends of the front end cover and the rear end cover are provided with annular convex spigot matched with the shell; the front end cover and the rear end cover are integrally cast and formed, and the second guide plate is cast and formed in the second cooling cavity.

The invention relates to a novel integrated water cooling system of a high-speed permanent magnet motor, which is a preferred scheme, wherein second guide plates in a second cooling cavity are a plurality of radially arranged linear second guide plates, and two linear second guide plates positioned on two sides of a water inlet are provided with guide openings at the inner diameter end close to the second cooling cavity; flow guide openings are respectively reserved at the inner diameter end and the outer diameter end of the second cooling cavity of the two adjacent linear second flow guide plates, so that two annular zigzag second cooling water channels which are connected in parallel are formed; alternatively, the first and second electrodes may be,

the second guide plate in the second cooling cavity comprises a first radial partition plate which radially penetrates through the second cooling cavity and is close to the end cover connecting channel, and a second radial partition plate which is symmetrically arranged with the first radial partition plate and is radially arranged, so that the refrigerant medium inlet or the refrigerant medium outlet and the end cover connecting channel are divided into two sides by the first radial partition plate and the second radial partition plate; a flow guide opening is reserved at the position, close to the inner circle of the second cooling cavity, of the radial partition plate II; second annular plates which extend to two sides of the first radial partition plate along the circumference are arranged at the inner end parts of the second radial partition plates, and flow guide ports are formed between the two end parts of the second annular plates and two side surfaces of the first radial partition plates; one side of the first radial partition plate is provided with a first annular plate, the diameter of the first annular plate is larger than that of the second annular plate, the first annular plate extends towards the second radial partition plate along the circumference, and a flow guide opening is reserved between the end part of the first annular plate and the second radial partition plate.

The novel integrated water cooling system of the high-speed permanent magnet motor is a preferable scheme, wherein sealing parts are arranged among the front end cover, the rear end cover and the shell, and each sealing part comprises a first sealing rubber strip and a second sealing rubber strip; the first sealing rubber strip is positioned around the first hole of the shell and the third holes of the front end cover and the rear end cover; the second sealing rubber strip is positioned at the matching seam allowance of the front end cover, the rear end cover and the machine shell.

According to the novel integrated water cooling system for the high-speed permanent magnet motor, due to the adoption of the technical scheme, the second cooling cavity communicated with the first cooling cavity channel in the shell is arranged in the front end cover and the rear end cover for arranging the ceramic bearing, and the first cooling cavity is communicated with the second cooling cavity through the connecting channels arranged in the front end cover, the rear end cover and the shell, so that heat transferred to the bearing by the rotor can be taken away through cooling media in the second cooling cavities of the front end cover and the rear end cover, the running condition of the bearing is improved, and the running life of the bearing is prolonged. Particularly, the second cooling cavities in the two end covers and the first cooling cavity in the shell are connected into a whole, only a pair of water inlet and outlet ports need to be arranged, external connecting parts are reduced, and leakage risks are reduced. Meanwhile, the problems that water inlets and water outlets are required to be arranged on the end cover and the shell respectively, so that external reducing connecting parts are increased, and the leakage risk is caused are solved, and the loss of the water cooling system can be reduced due to the fact that the external connecting reducing parts are reduced. Therefore, the shell and the end cover are integrally cooled, the cooling effect is enhanced, the running environment of the ball bearing is greatly improved, the running life of the bearing is prolonged, and the reliability of the motor is improved.

Furthermore, the invention adopts a multiple sealing structure, thereby reducing the leakage of refrigerant medium and ensuring the use safety of the motor.

Drawings

FIG. 1 is a schematic diagram of a water cooling system of a conventional high-speed permanent magnet motor;

FIG. 2 is a sectional view of the novel integrated water cooling system of the high-speed permanent magnet motor according to the present invention;

FIG. 3 is a perspective view of the housing of the novel integrated water cooling system of the high-speed permanent magnet motor according to the invention;

FIGS. 3A and 3B are sectional views of the housing of the novel integrated water cooling system of the high-speed permanent magnet motor along the central longitudinal direction and the horizontal direction;

fig. 3C and 3D are schematic diagrams of two embodiments of the first cooling water channel of the casing of the novel integrated water cooling system of the high-speed permanent magnet motor;

fig. 4A and 4B are perspective views of a front end cover or a rear end cover of the novel integrated water cooling system of the high-speed permanent magnet motor;

FIG. 4C is a cross-sectional view of the front end cover or the rear end cover of the novel integrated water cooling system of the high-speed permanent magnet motor;

fig. 4D and 4E are schematic diagrams illustrating two embodiments of the second cooling water channel shown in the front end cover or the rear end cover of the novel integrated water cooling system of the high-speed permanent magnet motor;

fig. 5 is a schematic view of a cooling mode of the novel integrated water cooling system of the high-speed permanent magnet motor.

Description of reference numerals: a front end cover 1; a second cooling cavity 11; the second guide plate 12, the first radial partition plate 121, the second radial partition plate 122, the first annular plate 123 and the second annular plate 124; a second cooling water channel 13; end cap connecting channel 14, hole three 141, hole four 142; a channel 15; a diversion port 16; front plate 17, inner bore 171, female ring spigot 172, rear plate 18; an annular male spigot 19; a housing 2; a first cooling cavity 21; a first baffle 22; a first cooling water channel 23; a connecting portion 24; a housing connecting channel 25, a first hole 251, a second hole 252; inner water jacket 26, outer flange ring 261; an outer water jacket 27, an inner flange ring 271; a diversion port 28; a rear end cap 3; a second cooling cavity 31; a second baffle 32; a second cooling water channel 33; the end cap connecting passage 34; a refrigerant medium inlet 41; a refrigerant medium outlet 42; a sealing member 5; a first sealing rubber strip 51, a second sealing rubber strip 52; a stator 6; a rotor 7; a ceramic ball bearing 8.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 2, a high-speed permanent magnet motor adopting the novel integrated water cooling system of the high-speed permanent magnet motor according to the present invention is shown, and includes: the rotor comprises a cylindrical shell 2, a front end cover 1 and a rear end cover 3 which are arranged at two ends of the shell 2, ceramic ball bearings 8 which are in interference fit with a rotating shaft and fastened at two ends of a rotor, and two ends of a rotor 7 are arranged at the central positions of the front end cover 1 and the rear end cover 3 through the ceramic ball bearings 8; the stator 6 is fixed in the casing 2, an air gap is arranged between the stator 6 and the rotor 7, and the integrated water cooling system is arranged on the casing 2, the front end cover 1 and the rear end cover 3.

Referring to fig. 2, the novel integrated water cooling system for the high-speed permanent magnet motor comprises a casing 2, and a front end cover 1 and a rear end cover 3 which are arranged at two ends of the casing 2, wherein a first cooling cavity 21 surrounding the whole casing 2 is arranged in a casing wall of the casing 2, and a first guide plate 22 is arranged in the first cooling cavity 21 to form a first cooling water channel 23; referring to fig. 4A to 4D,

second cooling cavities

11 and 31 are respectively disposed in the front end cover 1 and the rear end cover 3,

second flow deflectors

12 and 32 are disposed in the

second cooling cavities

11 and 31 to form second

cooling water channels

13 and 33, the second

cooling water channels

13 and 33 are communicated with the first cooling water channel 23 in the casing 2 through internal connecting channels, and a cooling medium inlet 41 and a cooling medium outlet 42 communicated with the second cooling cavities 11 are respectively disposed on the side surfaces of the front end cover 1 and the rear end cover 3.

Referring to fig. 2 and 3, the outer edges of the two ends of the housing 2 are respectively provided with a protruding connecting portion 24, the connecting passages include a housing connecting passage 25 provided in the two connecting portions 24 and end

cover connecting passages

14 and 34 provided in the front and rear end covers, and the connecting portions 24, the housing connecting passage 25 and the end

cover connecting passages

14 and 34 are preferably arranged 180 degrees symmetrically with respect to the refrigerant inlet 41 and the refrigerant outlet 42 in the circumferential direction. As shown in fig. 2 and 3B, the housing connecting passage 25 includes a first hole 251 perpendicular to the housing end surface and a second hole 252 perpendicular to and communicating with the first hole 215, and the other ends of the two holes 252 at both ends are respectively communicated with both ends of the first cooling cavity 21; referring to fig. 2 and 4C, for the front end cap 1 as an example, the front end cap connecting channel 14 includes a third hole 141 perpendicular to the end faces of the front and rear end caps and abutting against the first hole 251, and a fourth hole 142 located at the tail end of the third hole 141 and vertically communicating with the third hole, and the other end of the fourth hole 142 is communicated with the second cooling cavity 11; the end cap connecting channel 34 of the rear end cap 3 is identical in structure to the end cap connecting channel 14 of the front end cap. The first cooling cavity 21 on the machine shell 2 and the

second cooling cavities

11 and 31 on the end covers at two ends are communicated from the interior of the machine shell 2, the front end cover 1 and the rear end cover 3 through the connecting channel.

Referring to fig. 3A and 3B, which illustrate the structure of the housing 2 in the present embodiment, the housing 2 includes an inner water jacket 26 and an outer water jacket 27, and a protruding outer flange ring 261 is provided at the left end of the inner water jacket, i.e., the fixed end of the inner water jacket 26; an inner flange ring 271 extending to the inner diameter is provided at the right end of the outer water jacket 22, that is, at the fixed end portion of the outer water jacket 22; the free ends of the inner water jacket 26 and the outer water jacket 27 are inserted together, the free end of the inner water jacket 21 is welded with the inner flange ring 271 of the outer water jacket 27, the free end of the outer water jacket 22 is welded with the outer flange ring 261 of the inner water jacket 26, so that the annular first cooling cavity 21 is formed between the inner water jacket 26 and the outer water jacket 27, as shown in fig. 3C, the first guide plate 22 is arranged on the outer circular surface of the inner water jacket 21, and the height of the first guide plate 22 is consistent with the height of the first cooling cavity 21.

Referring to fig. 3C and 3D, two embodiments of the first cooling water channel 23 and the first baffle 22 are shown, and referring to fig. 3C, the first baffle 22 in the first cooling cavity 21 is a plate having a spiral shape, so as to form the first cooling water channel 23 having a spiral shape; referring to fig. 3D, another way of water channel is shown, in which the first baffles 22 are a plurality of linear first baffles, for example: 10 linear first flow deflectors 22 are arranged in the first cooling cavity 21 in parallel to the axial direction of the casing 2 at even intervals along the circumference, and one end of each linear first flow deflector 22 is provided with a flow guide opening 28 in the first cooling cavity 21, that is, one end of each linear first flow deflector 22 is fixed with the end part of the first cooling cavity 21, the other end of each linear first flow deflector 22 has a certain gap with the other end of the first cooling cavity 21, and the flow guide openings 28 of two adjacent first flow deflectors 22 are respectively positioned at two ends of the first cooling cavity, so as to form a zigzag first cooling water channel 23.

It should be noted that the casing 2 may adopt the above structure, or may be integrally cast, in which case, the first flow guiding plate 22 is directly cast and formed in the first cooling cavity 21. The connection portion 24 provided at the outer edge of the casing 2 may be a separate member, welded to the outside of the casing. When the housing 2 is of a unitary cast construction, the connection portion 24 and the housing connection passage 25 in the connection portion 245 may be directly cast.

The front end cover 1 or the rear end cover 3 is disc-shaped, the two end covers have the same structure, the front end cover 1 is taken as an example for illustration, and referring to fig. 4A-4C, the second cooling cavity 11 of the front end cover 1 is circular; the front end cover 1 comprises a disc-shaped front plate 17, an inner hole 171 matched with a bearing is arranged at the central position of the front plate 17, and an annular convex spigot 19 matched with the shell 2 is arranged at the inner end (facing to the shell cavity); a concave ring spigot 172 is arranged on one side of the front plate 17 close to the motor cavity, and the second cooling cavity 11 is arranged outside the inner hole 171 and inside the concave ring spigot 172 and is annular; a back plate 18 is arranged at the concave ring spigot 172, and the back plate 18 is embedded at the concave ring spigot 172 and fixed by adopting a welding mode, so that the second cooling cavity 11 is closed; the outer circle of the annular male spigot 19 is provided with a sealing groove 110 for arranging the second sealing rubber strip 52.

It should be noted that the front end cover 1 or the rear end cover 3 may also be integrally cast, so that the second baffle 12 is directly cast and formed in the second cooling cavity 11.

Referring to fig. 4E, which shows one form of the second baffle 12 in the second cooling cavity 11, the back plate 18 is omitted to show the shape of the second baffle 12. The second guide plates 12 in the second cooling cavity 11 are 12 radially arranged linear second guide plates 12, the front end cover 1 is provided with a channel 15 for communicating the refrigerant medium inlet 41 with the second cooling cavity 11, and the second guide plates 12 at two sides of the channel 15 are provided with guide openings 16 at the inner diameter ends close to the second cooling cavity 11, that is, the two second guide plates 12 are fixed at the outer diameter ends in a sealing manner; the diversion ports 16 of the remaining second diversion plates 12 are respectively arranged at the inner diameter end and the outer diameter end of the second cooling cavity 11 at intervals, that is, the diversion ports 16 are respectively reserved at the inner diameter end and the outer diameter end of the second cooling cavity 11 by two adjacent second diversion plates 12, so that two parallel annular zigzag second cooling water channels 13 are formed. The specific water flow channel is as follows: the cooling water enters the second cooling cavity 11 from the cold medium inlet 41 through the channel 15, flows into the two directions through the flow guide ports 16 at the end parts of the two adjacent second flow guide plates 12, finally flows out of the first cooling cavity 11 in the shell 2 from the end cover connecting channel 14, enters the second cooling cavity 31 from the end cover connecting channel 34 of the rear end cover, and reversely flows out of the cold medium outlet 42, so that the cooling cycle is completed. A seal groove 111 is provided on the end surface of the front cover 1 around the third hole 141 of the cover connection passage 14 for receiving the first seal ring 51.

Referring to fig. 4D, an alternative configuration of second baffle 12 is shown, with back plate 18 omitted to show the shape of second baffle 12. This second guide plate 12 has a plurality of ring boards and the combination of straight line board to constitute, and it includes: a first radial divider plate 121, a second radial divider plate 122, a first annular plate 123, and a second annular plate 124; the first radial partition plate 121 penetrates through the second cooling cavity 11 in the radial direction and is arranged at the fourth hole 142 close to the end cover connecting channel 14, and the second radial partition plate 122 and the first radial partition plate 121 are symmetrically arranged in the radial direction, so that the cold medium inlet 41 and the end cover connecting channel 14 are divided into two sides by the first radial partition plate 121 and the second radial partition plate 122, namely, the inlet and the outlet are arranged on two sides of the first radial partition plate 121 and the second radial partition plate 122 in a circle center symmetry manner; the second radial partition plate 122 is provided with a diversion port 16 close to the inner circle of the second cooling cavity 11; the second annular plate 124 is arranged at the inner end part of the radial partition plate two 122, the second annular plate 124 is in an open circle shape, two ends of the second annular plate extend to two sides of the radial partition plate one 121, and a diversion port 16 is arranged between two side faces of the radial partition plate one 121; one end of the first annular plate 123 is fixed to one side of the first radial separation plate 121 close to the fourth hole 142 near the end cover connecting passage 14, is semicircular, and the other end is a free end, extends to the side of the second radial separation plate 122, and leaves a flow guide opening 16 with the second radial separation plate 122, and the diameter of the first annular plate 123 is larger than that of the second annular plate 124. In this way, a circumferential second cooling water channel 13 is formed which flows from the inlet on the outer circumferential side of the second cooling cavity 11 into the inner circumferential side of the second cooling cavity 11 at the outlet on the outer circumferential side. The specific water flow channel is as follows: the cooling water enters the lower part of the radial partition plate two 122 from the cold medium inlet 41 through the channel 15, flows along the outer side wall of the lower half part of the second ring plate 124 in the direction of the radial partition plate one 121, flows along the inner side wall of the second ring plate 124 reversely through the diversion port 16, flows along the outer side wall of the second ring plate 124 reversely through the diversion port 16, enters the end cover connecting channel 14 along the outer side wall channel of the first ring plate 122 through the diversion port 16, flows out into the first cooling cavity 11 in the casing 2, enters the rear end cover 3, flows reversely with the second cooling water channel 13 of the front end cover 1, and flows out from the cold medium outlet 42.

The first sealing rubber strip 51 is located in the butt joint holes of the front and rear end covers 1 and 3 and the shell 2: the periphery of hole one 251 and hole three 141; the second sealing rubber strip 52 is located at the matching seam allowance of the front end cover 1, the rear end cover 3 and the casing 2, and the two sealing rubber strips form the sealing part of the invention, which can ensure that the sealing part has good sealing effect and prevent the cooling medium from leaking.

Referring to fig. 5, the channels of the cooling cycle are shown: the cooling water enters the second cooling cavity 11 of the front end cover 1 from the cold medium inlet 41 through the channel 15, circulates in the second cooling water channel 13, takes away heat of the front end bearing 8, enters the first cooling cavity 21 through the end cover connecting channel 14 and the machine shell connecting channel 25 to cool the stator, enters the second cooling cavity 31 of the rear end cover through the machine shell connecting channel 25 and the end cover connecting channel 34 to cool the rear end bearing, and finally flows out through the cold medium outlet 42. Therefore, the integrated cooling system is adopted, only one cooling medium inlet and one cooling medium outlet are needed to be arranged, and the connecting channel for communicating the cooling cavities is arranged inside the shell and the end cover, so that external connecting pipe fittings are reduced, the leakage risk is reduced, and the loss of the water cooling system is reduced. The cooling device has the advantage of good cooling effect, effectively improves the running environment of the ball bearing, prolongs the running life of the bearing, and improves the reliability of the motor.

The invention aims to provide an integrated cooling system of a high-speed permanent magnet motor, wherein cooling cavities are arranged on an end cover and a shell of the integrated cooling system and are communicated with each other, so that the whole machine is only provided with a pair of cooling medium inlets and outlets. The foregoing description is intended to illustrate and not limit the invention, and those skilled in the art will understand that many modifications, variations or equivalents may be made, such as changes in the shape of the first and second baffles, without departing from the spirit and scope of the invention as defined in the claims, which fall within the scope of the invention.

Claims

1. Novel integrated water cooling system of high-speed permanent-magnet machine, including the casing with establish front end housing, the rear end cap at casing both ends, its characterized in that: a first cooling cavity surrounding the whole shell is arranged in the shell wall of the shell, and a first guide plate is arranged in the first cooling cavity to form a first cooling water channel; the front end cover and the rear end cover are respectively internally provided with a second cooling cavity, a second guide plate is arranged in the second cooling cavity to form a second cooling water channel, the second cooling water channel is communicated with the first cooling water channel in the casing through connecting channels arranged in the front end cover, the rear end cover and the casing, and the side surfaces of the front end cover and the rear end cover are respectively provided with a cold medium inlet and a cold medium outlet which are communicated with the second cooling cavity.

2. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 1, characterized in that: the outer edges of two ends of the shell are provided with two protruding connecting parts, and the connecting channel comprises a shell connecting channel arranged in the connecting parts and end cover connecting channels arranged in the front end cover and the rear end cover; the shell connecting channel comprises a first hole vertical to the end face of the shell and a second hole located at the tail end of the first hole and used for being communicated with one end of the first cooling cavity; the end cover connecting channel comprises a third hole and a fourth hole, the third hole is perpendicular to the end face of the end cover and is in butt joint with the first hole, and the fourth hole is located at the tail end of the third hole and is communicated with the second cooling cavity.

3. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 2, characterized in that: the first flow guide plate arranged in the first cooling cavity is a spiral plate so as to form a spiral first cooling water channel; or the first guide plates are a plurality of linear first guide plates, the linear first guide plates are parallel to the axis of the shell and are arranged in the first cooling cavity at intervals, one end of each linear first guide plate is provided with a guide opening in the first cooling cavity, and the guide openings of the adjacent linear first guide plates are respectively positioned at two ends of the cooling cavity, so that a zigzag first cooling water channel is formed.

4. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 3, characterized in that: the machine shell comprises an inner water jacket and an outer water jacket, wherein a fixed end part of the inner water jacket is provided with a protruding outer flange ring, and a fixed end part of the outer water jacket is provided with an inner flange ring extending inwards in the radial direction; the inner water jacket and the outer water jacket are spliced together, the free end of the inner water jacket and the free end of the outer water jacket are respectively welded with the inner flange ring and the outer flange ring, an annular first cooling cavity is formed between the inner water jacket and the outer water jacket, and the first guide plate is arranged on the outer circular surface of the inner water jacket or the inner circular surface of the outer water jacket.

5. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 3, characterized in that: the casing is formed by integral casting, and the first guide plate is formed in the first cooling cavity by casting.

6. The novel integrated water cooling system of the high-speed permanent magnet motor according to any one of claims 2 to 5, characterized in that: the front end cover and the rear end cover are both disc-shaped, and the inner ends of the front end cover and the rear end cover are provided with annular convex rabbets matched with the shell; the front end cover and the rear end cover respectively comprise a disc-shaped front plate, an inner hole matched with the bearing is formed in the center of the front plate, a concave ring spigot is formed in one side, close to the motor cavity, of the front plate, and an annular second cooling cavity is formed by extending towards the front plate body along the end face of the concave ring spigot; and a rear plate welded with the front plate is arranged at the notch of the concave ring so as to seal the second cooling cavity.

7. The novel integrated water cooling system of the high-speed permanent magnet motor according to any one of claims 2 to 5, characterized in that: the front end cover and the rear end cover are both disc-shaped, and the inner ends of the front end cover and the rear end cover are provided with annular convex rabbets matched with the shell; the front end cover and the rear end cover are integrally cast and formed, and the second guide plate is cast and formed in the second cooling cavity.

8. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 6, characterized in that:

the second guide plates in the second cooling cavity are a plurality of radially arranged linear second guide plates, and guide openings are reserved at the inner diameter ends, close to the second cooling cavity, of the two linear second guide plates on the two sides of the water inlet; flow guide openings are respectively reserved at the inner diameter end and the outer diameter end of the second cooling cavity of the two adjacent linear second flow guide plates, so that two annular zigzag second cooling water channels which are connected in parallel are formed; alternatively, the first and second electrodes may be,

9. The novel integrated water cooling system of the high-speed permanent magnet motor according to claim 7, characterized in that:

10. The novel integrated water cooling system of the high-speed permanent magnet motor according to any one of claims 2 to 5, characterized in that: sealing parts are arranged among the front end cover, the rear end cover and the shell, and each sealing part comprises a first sealing rubber strip and a second sealing rubber strip; the first sealing rubber strip is positioned around the first hole of the shell and the third holes of the front end cover and the rear end cover; and the second sealing rubber strip is positioned at the matching seam allowance of the front end cover, the rear end cover and the machine shell.