CN212627534U

CN212627534U - Liquid cooling motor

Info

Publication number: CN212627534U
Application number: CN202021169511.3U
Authority: CN
Inventors: 张智超; 刘伟健; 卓明; 刘建国; 吴世历; 程宽宽
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-02-26
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a liquid cooling motor, include: the outer shell is a first cylinder with a hollow interior, and the wall of the first cylinder is provided with a liquid inlet and a liquid outlet; the cooling shell is a second cylinder body which is hollow inside, the second cylinder body is positioned inside the first cylinder body, a cooling water channel is formed in the outer wall of the second cylinder body, the cooling water channel extends from the position, corresponding to the liquid inlet, of the second cylinder body to the position, corresponding to the liquid outlet, of the second cylinder body, and a motor stator is arranged in the second cylinder body; the flow regulating assembly comprises a regulating valve, a temperature sensor and a controller, wherein the regulating valve is used for regulating the flow of cooling liquid entering the motor, and the temperature sensor is used for detecting the temperature of the motor stator; the controller adjusts the opening of the regulating valve according to the temperature detected by the temperature sensor to control the flow of the cooling liquid entering the motor. The utility model discloses a liquid cooling motor can realize the self-regulation of motor coolant flow, makes the motor temperature rise even, and stability improves, simple structure.

Description

Liquid cooling motor

Technical Field

The utility model belongs to the technical field of the liquid cooling motor, especially, relate to a liquid cooling motor.

Background

Along with the more severe requirements of motor application occasions, the power density of the motor is also continuously improved, which causes the problem of serious heating of the motor, more motors adopt an external cooling mode, and for the existing liquid cooling motor, the cooling structure is fixed, and the cooling flow is fixed. For motors applied to high-precision occasions such as machine tools and the like, the temperature rise of the motor is required to be stable, the current cooling liquid flow is fixed, the temperature rise of the motor is low under low load and high under high load, and the heat deformation caused by the temperature rise of the motor seriously affects the performance of the motor such as running precision.

Although the solution proposed in the prior patent CN106374681A can realize the flow regulation of the motor coolant, it needs to add an external electric pump, and needs to perform the linkage control of the motor controller and the electric pump, and for most of the current machine tool applications, it is required that each part has a compact structure, and the external parts are reduced as much as possible, and this implementation has obvious disadvantages.

Therefore, the utility model is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a self-regulation that can realize motor coolant flow, makes the motor temperature rise even, and stability improves, simple structure's liquid cooling motor.

In order to solve the technical problem, the utility model provides a liquid cooling motor, include:

the device comprises an outer shell, a first barrel and a second barrel, wherein the outer shell is hollow, and a liquid inlet and a liquid outlet are formed in the wall of the first barrel;

the cooling shell is a second cylinder body which is hollow inside, the second cylinder body is positioned inside the first cylinder body, a cooling water channel is formed in the outer wall of the second cylinder body, the cooling water channel extends from the position, corresponding to the liquid inlet, of the second cylinder body to the position, corresponding to the liquid outlet, of the second cylinder body, and a motor stator is arranged in the second cylinder body;

the flow regulating assembly comprises a regulating valve, a temperature sensor and a controller, wherein the regulating valve is used for regulating the flow of the cooling liquid entering the motor, and the temperature sensor is used for detecting the temperature of the stator of the motor; the controller adjusts the opening of the regulating valve according to the temperature detected by the temperature sensor to control the flow of the cooling liquid entering the motor.

Further optionally, an installation groove is formed in the outer end face, close to the liquid inlet of the cooling water channel, of the cooling shell, the controller is embedded in the installation groove, the regulating valve is arranged at the liquid inlet, and the temperature sensor is located in the motor stator; one end of the controller, which is close to the outer shell, is connected with the regulating valve, and one end of the controller, which is close to the motor stator, is connected with the temperature sensor.

Further optionally, the regulating valve comprises a valve body and a connecting piece connected with the valve body, and the valve body is arranged on the liquid inlet through the connecting piece;

the valve body is provided with a fluid inlet, a fluid channel communicated with the fluid inlet is arranged in the connecting piece, and the fluid channel communicates the fluid inlet with a liquid inlet of the cooling water channel; the valve body is also internally provided with a switch piece, and the controller regulates the flow of the cooling liquid entering the motor by controlling the size of the cross section area of the fluid inlet opened by the switch piece.

Further optionally, an installation through groove is formed in the side wall of the valve body, the installation through groove communicates the fluid inlet with the outside, and the switch member is arranged in the installation through groove;

the switch piece comprises an electromagnetic coil and a movable magnetic sliding block which are sequentially arranged from outside to inside, the electromagnetic coil is connected with the magnetic sliding block through an elastic piece, the electromagnetic coil is connected with the controller, the controller adjusts the magnetic attraction force between the electromagnetic coil and the magnetic sliding block by controlling the current flowing through the electromagnetic coil, and the magnetic sliding block moves towards the direction close to/far away from the electromagnetic coil according to the change of the magnetic attraction force to adjust the size of the cross-sectional area of the fluid inlet.

Further optionally, the connecting piece is a connecting screw rod, and the liquid inlet is provided with threads matched with the connecting screw rod.

Further optionally, the flow regulating assembly further comprises a generator, and the generator generates electricity through kinetic energy provided by the cooling liquid and provides electric energy for the regulating valve.

Further optionally, a connecting hole is formed at the inlet of the mounting groove and the inlet of the cooling water channel;

the generator comprises a generator main body and an impeller, the generator main body is located in the mounting groove and integrated with the controller, the impeller is located at the position, opposite to the liquid inlet, of the inlet of the cooling water channel, a rotating shaft is connected to the impeller, and the rotating shaft penetrates through the connecting hole and is connected with the generator main body.

Further optionally, the cooling water channel extends from the position of the second cylinder corresponding to the liquid inlet to the position of the second cylinder corresponding to the liquid outlet in a spiral shape.

Further optionally, the motor stator comprises stator windings, and the temperature sensor is located within the stator windings.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

1. the liquid cooling motor of the utility model realizes the self-regulation of the flow of the motor cooling liquid;

2. the liquid cooling motor of the utility model has even temperature rise and improved operation stability;

3. the liquid cooling motor of the utility model improves the running precision of the motor, and is suitable for more high-precision application occasions;

4. the utility model discloses a liquid cooling motor simple structure need not outside power supply.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1: is a schematic structural diagram of a liquid cooling motor in an embodiment of the utility model;

FIG. 2: is a cross-sectional view of fig. 1;

FIG. 3: is a schematic structural diagram of a flow regulating assembly of the embodiment of the utility model;

FIG. 4: is a schematic structural diagram of a regulating valve of the embodiment of the utility model;

FIG. 5: is a schematic structural diagram of the cooling shell of the embodiment of the utility model;

FIG. 6: is a schematic structural diagram of the outer shell of the embodiment of the utility model;

FIG. 7: is a control flow chart of the embodiment of the utility model.

Wherein: 1. an outer housing; 11. a liquid inlet; 12. a liquid outlet; 2. cooling the housing; 21. a cooling water channel; 22. mounting grooves; 3. a motor stator; 31. a stator winding; 4. a flow regulating assembly; 41. Adjusting a valve; 42. a power supply box; 43. a temperature sensor; 44. an impeller; 45. a set screw; 46. A rotating shaft; 411. a valve body; 412. a connecting member; 4111. a fluid inlet; 4112. an electromagnetic coil; 4113. a spring; 4114. a magnetic slider; 4115. installing a through groove; 4121. a fluid channel;

it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected", "contacting" and "communicating" are to be interpreted broadly, e.g. as either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment proposes a liquid-cooled electric machine, as shown in fig. 1 to 6, comprising an outer casing 1, a cooling casing 2, a motor stator 3 and a flow regulating assembly 4. As shown in fig. 6, the outer shell 1 is a first cylinder with a hollow interior, and a liquid inlet 11 and a liquid outlet 12 are formed on the wall of the first cylinder; as shown in fig. 5, the cooling housing 2 is a second cylinder with a hollow interior, the second cylinder is located inside the first cylinder, a cooling water channel 21 is formed in an outer wall of the second cylinder, the cooling water channel 21 extends from a position of the second cylinder corresponding to the liquid inlet 11 to a position of the second cylinder corresponding to the liquid outlet 12, and a motor stator 3 is arranged in the second cylinder; preferably, the cooling water channel 21 extends spirally from the position of the second cylinder corresponding to the liquid inlet 11 to the position of the second cylinder corresponding to the liquid outlet 12, so as to increase the area of the cooling liquid flowing through the cooling housing 2, thereby obtaining a better cooling effect. The cooling liquid flows into the water inlet of the cooling water channel 21 through the liquid inlet 11 on the outer shell 1, flows to the water outlet of the water channel along with the trend of the cooling water channel 21 on the cooling shell 2, and finally flows out of the motor through the liquid outlet 12 of the outer shell 1. The heat that motor stator 3 gived off has been taken away at the in-process that cooling liquid flows at cooling body 2 to the effect of cooling has been played.

As shown in fig. 2 and 3, the flow regulating assembly 4 includes a regulating valve 41, a temperature sensor 43 and a controller, the regulating valve 41 is used for regulating the flow of the cooling liquid into the motor, and the temperature sensor 43 is used for detecting the temperature of the motor stator 3; the controller adjusts the opening of the regulating valve 41 in accordance with the temperature detected by the temperature sensor 43 to control the flow rate of the cooling liquid into the motor. Preferably, the motor stator 3 includes a stator winding 31, a temperature sensor 43 is located within the stator winding 31, and the temperature sensor 43 detects the temperature of the stator winding 31.

Specifically, as shown in fig. 2, an installation groove 22 is formed in an outer end surface of the cooling housing 2 close to a liquid inlet of the cooling water channel 21, the controller is embedded in the installation groove 22, the regulating valve 41 is arranged at the liquid inlet 11, and the temperature sensor 43 is located in the motor stator 3; the end of the controller close to the outer shell 1 is connected with the regulating valve 41, and the end close to the motor stator 3 is connected with the temperature sensor 43. The controller changes the size of the valve of the regulating valve 41 according to the temperature of the motor, and then controls the flow of cooling water of the motor until the temperature of the motor reaches a preset temperature.

As shown in FIG. 3, the regulating valve 41 comprises a valve body 411 and a connecting piece 412 connected with the valve body 411, wherein the valve body 411 is arranged on the liquid inlet 11 through the connecting piece 412; a fluid inlet 4111 is formed in the valve body 411, a fluid passage 4121 communicated with the fluid inlet 4111 is formed in the connecting piece 412, and the fluid inlet 4111 is communicated with a fluid inlet of the cooling water channel 21 through the fluid passage 4121; a switch member is further disposed in the valve body 411, and the controller adjusts the flow rate of the cooling liquid entering the motor by controlling the size of the cross-sectional area of the fluid inlet 4111 opened by the switch member. As shown in fig. 4, a mounting through groove 4115 is formed in a side wall of the valve body 411, the mounting through groove 4115 communicates the fluid inlet 4111 with the outside, and the switch member is disposed in the mounting through groove 4115; the switch member comprises an electromagnetic coil 4112 and a movable magnetic slider 4114 which are arranged in sequence from outside to inside, wherein the electromagnetic coil 4112 and the magnetic slider 4114 are connected through an elastic member, preferably through a spring 4113. Solenoid 4112 is connected to a controller, which adjusts a magnetic attraction force between solenoid 4112 and magnetic slider 4114 by controlling a current flowing through solenoid 4112, and magnetic slider 4114 moves toward/away from solenoid 4112 to adjust a cross-sectional area of fluid inlet 4111. The connecting piece 412 is a connecting screw rod, the liquid inlet 11 is provided with a thread matched with the connecting screw rod, the regulating valve 41 is connected with the shell through the thread, and after the regulating valve 41 receives a signal generated by the controller, the flow of the cooling liquid entering the motor is changed by changing the size of the cross section of the inlet.

After the motor starts to operate, external cooling liquid enters the motor cooling shell 2 to start cooling the motor. When the load of the motor is low, the heat productivity of the motor is low, the flow of the cooling liquid is high, the temperature of the cooling liquid is lower than the preset temperature of the controller, the controller receives a temperature signal and then controls the adjusting valve 41 to reduce the area of an inlet, the water flow flowing into the motor is reduced, the temperature rise of the motor is increased until the preset temperature of the controller is reached, and the adjusting valve 41 stops flow adjustment. On the contrary, when the working load of the motor suddenly rises, the temperature of the motor rises, and the controller controls the regulating valve 41 to increase the flow until the temperature of the motor is reduced to the preset temperature. The system can realize self-regulation of the temperature of the motor without adding external equipment, and the temperature rise of the motor is kept constant, so that the motor keeps a stable working state, the running precision is greatly improved, and the system has great application value for high-end application occasions such as current machine tools and aerospace.

Further optionally, the flow regulating assembly 4 further comprises a generator for generating electricity from the kinetic energy provided by the cooling fluid and providing electrical energy to the regulating valve 41.

Specifically, as shown in fig. 2 and 3, a connection hole is formed at the inlet of the installation groove 22 and the cooling water channel 21; the generator comprises a generator main body and an impeller 44, the generator main body is positioned in the mounting groove 22 and is integrally arranged with the controller, the impeller 44 is positioned at a position where an inlet of the cooling water channel 21 is opposite to the liquid inlet 11, the impeller 44 is connected with a rotating shaft 46, and the rotating shaft 46 penetrates through the connecting hole to be connected with the generator main body. As shown in fig. 1 and 2, the controller and the generator are integrally formed into a power box 42, the power box 42 is located in the mounting groove 22, the power box 42 is fixed to the cooling casing 2 by a fixing screw 45, a generator rotating shaft 46 is inserted into the cooling water passage 21 through a connecting hole, and a generator impeller 44 is mounted to the rotating shaft 46 and placed at an inlet of the cooling water passage 21.

The motor coolant flows into the cooling shell 2 after passing through the flow valve, and the kinetic energy and potential energy of the coolant push the impeller 44 below the inlet of the cooling water channel 21 to rotate, so as to drive the generator to generate electric energy, thereby providing a power source for the flow regulating valve 41 and realizing the flow regulation of the motor coolant.

The utility model also provides a flow control method of liquid cooling motor, the temperature that detects according to temperature sensor 43 comes flow control valve's aperture.

As shown in fig. 7, which is a control flow chart of this embodiment, the temperature sensor 43 detects the temperature of the motor stator 3, the temperature of the motor stator 3 feeds back the motor temperature, the temperature sensor 43 feeds back the detected motor temperature to the controller, and when the temperature of the motor stator 3 is higher than the preset temperature, the opening of the flow valve is increased to increase the flow rate of the cooling liquid until the temperature of the motor stator 3 is reduced to the preset temperature, and the flow rate adjustment is stopped; and when the temperature of the motor stator 3 is lower than the preset temperature, reducing the opening of the flow valve to reduce the flow of the cooling liquid until the temperature of the motor stator 3 is raised to the preset temperature, and stopping flow regulation. The generator provides electric energy for the flow valve flow regulation process.

Further optionally, when the temperature of the motor stator 3 is greater than the preset temperature, increasing the current value flowing through the electromagnetic coil 4112, so that the magnetic slider 4114 moves towards the direction close to the electromagnetic coil 4112 until the temperature of the motor stator 3 is reduced to the preset temperature, and maintaining the current value; when the temperature of the motor stator 3 is lower than the preset temperature, the current value flowing through the electromagnetic coil 4112 is reduced, so that the magnetic slider 4114 moves in the direction away from the electromagnetic coil 4112 until the temperature of the motor stator 3 is reduced to the preset temperature, and the current value is maintained.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A liquid-cooled electric machine, comprising:

2. The liquid-cooled motor of claim 1, wherein the cooling housing is provided with a mounting groove near an outer end surface of the liquid inlet of the cooling water channel, the controller is embedded in the mounting groove, the regulating valve is arranged at the liquid inlet, and the temperature sensor is positioned in the motor stator; one end of the controller, which is close to the outer shell, is connected with the regulating valve, and one end of the controller, which is close to the motor stator, is connected with the temperature sensor.

3. The liquid-cooled motor of claim 2, wherein the regulating valve comprises a valve body and a connecting piece connected with the valve body, and the valve body is arranged on the liquid inlet through the connecting piece;

4. The liquid-cooled motor of claim 3, wherein a mounting through groove is formed in a side wall of the valve body, the mounting through groove communicates the fluid inlet with the outside, and the switch member is disposed in the mounting through groove;

5. The liquid-cooled motor of claim 3, wherein the connecting piece is a connecting screw rod, and the liquid inlet is provided with threads matched with the connecting screw rod.

6. A liquid-cooled machine as claimed in any one of claims 2 to 5, wherein the flow regulating assembly further comprises a generator for generating electricity from the kinetic energy provided by the coolant and for providing electrical power to the regulating valve.

7. The liquid-cooled motor of claim 6, wherein a connecting hole is formed at the inlet of the mounting groove and the cooling water channel;

8. A liquid-cooled machine as claimed in any one of claims 1 to 5, wherein the cooling water channel extends helically from the position of the second cylinder corresponding to the liquid inlet to the position of the second cylinder corresponding to the liquid outlet.

9. A liquid-cooled machine as claimed in any one of claims 1 to 5, wherein the machine stator comprises stator windings and the temperature sensor is located within the stator windings.