CN209119985U - Liquid-cooled motor - Google Patents

Abstract

An embodiment of the present invention provides a liquid-cooled motor, comprising a casing and two end covers; the casing is provided with a first cooling liquid channel and a first interface and a second interface respectively communicating with the first cooling liquid channel ; At least one of the end covers has a third interface, a fourth interface and a second cooling liquid channel, and the second cooling liquid channel is arranged around the bearing installation position, the end cover is installed on the end face of the casing, and The third interface is connected with the first interface, and the fourth interface is connected with the second interface; the casing is provided with a liquid inlet and an outlet respectively communicated with the first cooling liquid channel liquid port. The utility model realizes the heat dissipation of the bearing by arranging the cooling liquid channel on the end cover. In addition, the utility model also provides heat-conducting material on the part of the stator winding located outside the end face of the stator iron core, so that the part of the stator winding located outside the end face of the stator iron core can be dissipated through the casing and the end cover at the same time, thereby improving the heat dissipation of the stator winding. Effect.

Description

Liquid-cooled motor

technical field

The new model relates to the field of motors, more particularly, to a liquid-cooled motor.

Background technique

As a mature cooling technology, liquid cooling has been widely used in industrial applications, such as motors and controllers. Since the heat dissipation rate of liquid is much greater than that of air, the heat dissipation efficiency of liquid-cooled radiators is much higher than that of air-cooled radiators, and the noise can also be well controlled.

Common water-cooled motors reduce the temperature of the motor stator by setting a water jacket on the casing, such as setting a spiral water jacket or a double-shaped water jacket in the casing. Although a cooling water jacket is arranged in the casing to dissipate heat to the entire stator of the motor, under the condition of high speed of the motor, the casing and the stator iron core are close to each other, and the heat dissipation of the windings in the stator iron core is acceptable, but The cooling effect of the windings beyond the two ends of the stator core is relatively limited, and the cooling capacity bottleneck is obvious.

In addition, in the high speed condition of the motor, the bearing temperature is high, and the thermal failure of the bearing is serious.

SUMMARY OF THE INVENTION

The utility model provides a liquid-cooled motor in order to solve the problem that the bearing temperature is relatively high and thermal failure may occur in the high-speed working condition of the motor.

The embodiment of the present invention is also used to solve the problem that the heat dissipation effect of the windings beyond the two end faces of the stator core is poor.

The technical solution of the new embodiment to solve the above technical problem is to provide a liquid-cooled motor, which includes a casing and two end covers, and the end covers have bearing installation positions; the casing has a first cooling liquid a channel and a first interface and a second interface respectively communicated with the first cooling liquid channel, and the first interface and the second interface are respectively located on the same side end face of the casing; at least one of the end covers has A third interface, a fourth interface, and a second coolant channel located between the third interface and the fourth interface, and the second coolant channel is arranged around the bearing installation position, and the end cover is mounted on The end face of the casing, the third interface is connected with the first interface, the fourth interface is connected with the second interface; The liquid inlet and the liquid outlet communicated by the channel.

Preferably, each end surface of the end cap has the first interface and the second interface respectively communicating with the first cooling liquid channel, and each of the end caps has the third interface, the fourth interface and A second coolant channel located between the third interface and the fourth interface.

Preferably, the casing has a stator iron core and a stator winding wound on the stator iron core, the part of the stator winding located outside the end face of the stator iron core and the inner side wall of the end cover and the machine A thermally conductive material is provided between the inner walls of the shell.

Preferably, the thermally conductive material is made of thermally conductive resin; the thermally conductive resin wraps the part of the stator winding outside the end face of the stator core by a potting process, and is connected with the inner wall of the casing and the end cover. The inner wall is in contact with the heat conduction.

Preferably, the thermally conductive material includes a thermally conductive metal ring and a thermally conductive resin, wherein: the thermally conductive metal ring is arranged at the end of the stator core and is attached to the inner wall of the casing; the thermally conductive resin is encapsulated by a potting process The part of the stator winding located outside the end face of the stator iron core is wrapped, and is in contact with the inner wall of the metal ring and the inner wall of the end cover to conduct heat.

Preferably, each of the end caps includes a first end plate and a second end plate, the third interface and the fourth interface are respectively formed by through holes on the first end plate, and the second cooling liquid The channel is located between the first end plate and the second end plate; the end cover is mounted to the casing in a manner that the first end plate is attached to the end face of the casing.

Preferably, the second cooling liquid channel is formed by an annular groove located on the first end plate, by an annular groove located on the second end plate, or by an annular groove located on the first end plate and the second end plate respectively. The grooves of the two end plates are spliced together.

Preferably, the casing includes a main casing and a sleeve, the sleeve is sleeved outside the main casing in an interference manner, and the first cooling liquid channel is formed by a groove on the outer periphery of the main casing constitute.

Preferably, the first cooling liquid channel is distributed on the casing in a spiral shape, and the axis of the spiral is the same as the axis of the casing.

Preferably, the liquid inlet and the liquid outlet are located at different ends of the casing.

The liquid-cooled motor of the embodiment of the present invention has the following beneficial effects: by arranging a second cooling liquid channel around the bearing installation position on the end cover, and connecting the above-mentioned second cooling liquid channel with the first cooling liquid channel of the casing, thereby At the same time as the motor is cooled, the bearing heat dissipation is realized to avoid the problem of thermal failure of the bearing. In addition, the utility model also arranges a heat-conducting material between the part of the stator winding located outside the end face of the stator iron core and the end cover and the inner wall of the casing, so that the casing and the end cover can be used for the stator winding to be located on the end face of the stator iron core at the same time. The external part dissipates heat, which improves the heat dissipation effect of the stator winding beyond the two ends of the stator core.

Description of drawings

1 is a schematic diagram of a liquid-cooled motor provided by an embodiment of the present invention;

2 is a schematic cross-sectional view of a liquid-cooled motor provided by an embodiment of the present invention;

3 is a schematic diagram of a main casing of a casing and a first end plate of an end cover in a liquid-cooled motor provided by an embodiment of the present invention;

4 is an exploded schematic view of the main casing of the casing and the first end plate of the end cover in the liquid-cooled motor provided by the embodiment of the present invention;

5 is a schematic diagram of the assembled main casing of the casing and the first end plate of the end cover in the liquid-cooled motor provided by the embodiment of the present invention;

6 is a schematic cross-sectional view of a liquid-cooled motor provided by another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

As shown in Figures 1-5, it is a schematic diagram of a liquid-cooled motor provided by an embodiment of the present invention. The liquid-cooled motor can be used to drive the mechanical structure to operate, and realize heat dissipation from the stator through cooling liquid. The liquid-cooled motor in this embodiment includes a casing 1 and two end covers 2 (ie, a front end cover and a rear end cover), and the two end covers 2 are respectively assembled to two end faces of the casing 1 .

The casing 1 has a bearing installation position 22 , a first cooling liquid channel 13 , a first interface 112 and a second interface 113 , and the first and second interfaces 112 and 113 communicate with the first cooling liquid channel 13 respectively. Each end surface of the above-mentioned casing 1 has a first interface 112 and a second interface 113 at the same time. The casing 1 also has a liquid inlet 14 and a liquid outlet 15 which are respectively communicated with the first cooling liquid channel 13 . To facilitate assembly, the liquid inlet 14 and the liquid outlet 15 may be located at different ends of the casing 1 .

Each end cover 2 has a third port 212 , a fourth port 213 and a second cooling liquid channel 23 , the second cooling liquid channel 23 is located between the third port 212 and the fourth port 213 , and the second cooling liquid channel 23 is arranged around the bearing installation position 22 . Each end cover 2 is mounted on the end face of the casing 1 in the following manner: the third interface 212 is connected to the first interface 112 of the casing 1 , and the fourth interface 213 is connected to the second interface 113 of the casing 1 .

When the above liquid-cooled motor is running, the cooling liquid flows in from the liquid inlet 14 , flows into the second cooling liquid channel 23 of one of the end caps 2 through the third port 212 , and then flows into the first cooling liquid passage 23 of the casing 1 from the fourth port 213 After the cooling liquid channel 13 flows into the second cooling liquid channel 23 of the other end cover 2 through the first interface, it flows out from the liquid outlet 15 through the second interface 113, and the heat exchange is completed during the flow process, which improves the performance of the liquid-cooled motor. cooling efficiency.

In the above-mentioned liquid-cooled motor, since the end cover 2 has a second cooling liquid channel 23, and the second cooling liquid channel 23 is arranged around the bearing installation position 22, heat exchange can be performed with the bearing in the bearing installation position 22, and the speed of cooling The heat generated by the bearing when the motor is running at high speed is removed to improve the stability of the bearing.

In practical applications, in addition to disposing the second cooling liquid channel 23 in the two end covers 2 respectively, the second cooling liquid channel 23 may also be disposed in only one of the end covers 2 according to actual needs. Correspondingly, the casing 1 It is only necessary to provide the first interface 112 and the second interface 113 on one end face.

In the above-mentioned liquid-cooled motor, the casing 1 has a stator iron core 3 and a stator winding 4 wound around the stator iron core 3 . A thermally conductive material is provided between the portion of the stator winding 4 located outside the end face of the stator core 3 , the inner side wall of the end cover 2 and the inner wall of the casing 1 , that is, the thermally conductive material is simultaneously connected to the stator winding 4 , the end cover 2 and the casing 1 . contact, so that the heat of the stator winding 4 (especially the part of the stator winding 4 protruding from the end face of the stator core 3 ) can be conducted to the casing 1 and the end cover 2 through the above-mentioned thermally conductive material, and through the first cooling of the casing 1 The cooling liquid in the liquid channel 13 and the second cooling liquid channel 23 of the end cover 2 dissipates heat, which greatly improves the heat dissipation effect of the part of the stator winding 4 protruding from the end face of the stator core 3 .

Preferably, the above-mentioned thermally conductive material may be composed of thermally conductive resin 5 . The thermally conductive resin 5 wraps the part of the stator winding 4 outside the end face of the stator core 3 by a potting process, and is in contact with the inner wall of the casing 1 and the inner wall of the end cover 2 to conduct heat. In addition, as shown in FIG. 6 , in addition to the thermally conductive resin 5, the above-mentioned thermally conductive material may also include a thermally conductive metal ring 6, and the thermally conductive metal ring 6 is disposed at the end of the stator core 3 and attached to the inner wall of the casing 1 to conduct heat. The resin 5 wraps the part of the stator winding 4 outside the end face of the stator core 3 by a potting process, and is in contact with the inner wall of the heat-conducting metal ring 6 and the inner side wall of the end cover 2 to conduct heat.

As shown in FIGS. 3 and 4 , the above-mentioned end cap 2 can specifically adopt the following structure: it includes a first end plate 21 and a second end plate 22 , and the third interface 212 and the fourth interface 213 are respectively connected by the communication holes on the first end plate 21 A hole is formed, and the second coolant passage is located between the first end plate 21 and the second end plate 22 . The above-mentioned end cover 2 is attached to the casing 1 in a manner that the first end plate 21 is attached to the end surface of the casing 1 .

In particular, the second cooling liquid channel 23 may be formed by an annular groove 211 located on the outer side surface of the first end plate 21 (ie, the side facing away from the end surface of the casing 1 ), and the second end plate 22 is attached to the first end plate 21 . One side of 21 is flat. In addition, the second cooling liquid channel 23 can also be formed by an annular groove located on the second end plate 22 (a side attached to the first end plate 21 ) (in this case, the first end plate 21 is attached to the second end plate 22 ). One side is flat), or is formed by splicing grooves respectively located on the first end plate 21 and the second end plate 22 .

Referring to FIGS. 3-5 , the casing 1 may specifically adopt the following structure: it includes a main casing 11 and a sleeve 12 , the sleeve 12 is sleeved outside the main casing 11 in an interference manner, and the first cooling liquid channel 23 is located at the The groove 111 on the outer periphery of the main casing 11 is formed.

In order to improve the heat dissipation effect and take into account the flow resistance of the cooling liquid in the first cooling liquid channel 13, the first cooling liquid channel 13 on the casing 1 is spirally distributed on the casing 1, and the axis of the above-mentioned spiral is spiral. It is the same as the axis of casing 1.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or Replacement should be covered within the scope of protection of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A liquid-cooled motor, characterized in that it comprises a casing and two end covers, and the end covers have bearing installation positions; a first interface and a second interface communicated by the cooling liquid channel, and the first interface and the second interface are respectively located on the same side end face of the casing; at least one of the end caps has a third interface, a fourth interface and a second coolant channel located between the third interface and the fourth interface, and the second coolant channel is arranged around the bearing installation position, the end cover is mounted on the end face of the casing, and The third interface is connected to the first interface, and the fourth interface is connected to the second interface; the casing is provided with a liquid inlet and an outlet respectively communicated with the first cooling liquid channel liquid port. 2 . The liquid-cooled motor according to claim 1 , wherein each end face of the end cover has the first interface and the second interface respectively communicated with the first cooling liquid channel, and each end The end cap has the third port, the fourth port, and a second cooling liquid channel located between the third port and the fourth port. 3 . The liquid-cooled motor according to claim 2 , wherein the casing has a stator core and a stator winding wound on the stator core, and the stator winding is located on the stator core. 4 . A thermally conductive material is arranged between the part outside the end face, the inner side wall of the end cover and the inner wall of the casing. 4 . The liquid-cooled motor according to claim 3 , wherein the thermally conductive material is made of thermally conductive resin; the thermally conductive resin wraps the part of the stator winding outside the end face of the stator iron core by a potting process, 5 . And it is in contact with the inner wall of the casing and the inner wall of the end cover to conduct heat. 5 . The liquid-cooled motor according to claim 3 , wherein the thermally conductive material comprises a thermally conductive metal ring and a thermally conductive resin, wherein: the thermally conductive metal ring is arranged on the end of the stator core and is attached to the the inner wall of the casing; the thermally conductive resin wraps the part of the stator winding outside the end face of the stator core by a potting process, and is in contact with the inner wall of the metal ring and the inner wall of the end cover to conduct heat. 6 . The liquid-cooled motor according to claim 2 , wherein each end cover comprises a first end plate and a second end plate, and the third interface and the fourth interface are respectively formed by the first end plate. 7 . The through holes on the plate are formed, and the second cooling liquid channel is located between the first end plate and the second end plate; the end cover is installed in the way that the first end plate is attached to the end face of the casing to the enclosure. 7 . The liquid-cooled motor according to claim 6 , wherein the second cooling liquid channel is formed by an annular groove located on the first end plate, and is formed by an annular groove located on the second end plate. 8 . It is formed by splicing or splicing grooves respectively located on the first end plate and the second end plate. 8 . The liquid-cooled motor according to claim 1 , wherein the casing comprises a main casing and a sleeve, the sleeve is sleeved outside the main casing in an interference manner, and the first A coolant passage is formed by grooves in the outer periphery of the main casing. 9 . The liquid-cooled motor according to claim 8 , wherein the first cooling liquid channel is distributed in a spiral shape on the casing, and the axis of the spiral is connected to the axis of the casing. 10 . same heart. 10 . The liquid-cooled motor according to claim 1 , wherein the liquid inlet and the liquid outlet are located at different ends of the outer periphery of the casing. 11 .