CN215071929U

CN215071929U - Cooling motor

Info

Publication number: CN215071929U
Application number: CN202120798642.6U
Authority: CN
Inventors: 李伟; 李云飞; 杨治中; 郇正泽
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-07
Anticipated expiration: 2031-04-19

Abstract

The utility model provides a cooling motor, including casing, bearing collar, bearing, two annular lids and heat-transfer device. An end cover is arranged at the end part of the shell, and a central hole is formed in the end cover; the shell and the end cover enclose to form a motor cavity; the bearing mounting ring is arranged on the central hole; the bearing is connected to the bearing mounting ring; the two annular covers are respectively arranged on two sides of the bearing and are respectively connected with the bearing mounting ring; the two annular covers enclose to form a bearing cavity; the heat conducting device penetrates through the annular cover close to one side of the motor cavity to conduct heat in the bearing cavity to the motor cavity. The cooling motor of this application sets up heat-transfer device, with the heat conduction extremely in the bearing cavity of bearing between casing and the output shaft the motor cavity dispels the heat, prolongs bearing life and motor full-power operating time.

Description

Cooling motor

Technical Field

The utility model relates to a motor cooling technical field especially relates to a cooling motor.

Background

The existing motor is cooled by cooling the iron core of the motor mostly. However, in some current motors (including but not limited to high power motors, for example) when operating at full load and full power, the bearing between the housing and the output shaft has a serious problem of heating. The bearing needs to be sealed in the bearing cavity for fixing the bearing, but heat is not easily dissipated in the bearing cavity, so that the motor cannot run for a long time. At present, a method for pertinently cooling the bearing is not provided, the bearing is extremely easy to damage, and the service life of the motor is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a cooling motor can dispel the heat to the bearing between casing and the output shaft, prolongs bearing life and motor full power operating time.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a cooled electric machine comprising: the end part of the shell is provided with an end cover, and the end cover is provided with a central hole; the shell and the end cover enclose to form a motor cavity; a bearing mounting ring disposed on the central bore; the bearing is connected to the bearing mounting ring; the two annular covers are respectively arranged on two sides of the bearing and are respectively connected with the bearing mounting ring; the two annular covers enclose to form a bearing cavity; and the heat conduction device penetrates through the annular cover close to one side of the motor cavity so as to conduct heat in the bearing cavity to the motor cavity.

Optionally, the heat conducting device includes a heat conducting fin and a plurality of heat conducting rods, the heat conducting fin is disposed in the bearing cavity, and the heat conducting rods penetrate through the annular cover to be connected with the heat conducting fin.

In one embodiment, the heat-conducting fin is annular, and the heat-conducting fin is arranged around the circumference of the bearing cavity.

In one embodiment, the heat conducting device comprises at least two heat conducting rods, and each heat conducting rod is sequentially arranged around the circumference of the annular cover.

In one embodiment, the annular cover is provided with a threaded hole communicating with the bearing cavity, and the heat conduction rod is screwed on the threaded hole.

In one embodiment, the heat conducting rod comprises a limiting block and a rod body connected with the limiting block, the rod body penetrates through the annular cover body, and the limiting block is limited at one end of the annular cover body, which is far away from the heat conducting fin.

In one embodiment, the heat conduction rod has a cavity.

In one embodiment, a water cooling channel is arranged in the end cover, and a heat absorption rib plate is arranged on one surface of the end cover facing the motor cavity.

In one embodiment, the end cover comprises a main cover body, a groove is formed in the main cover body, and the heat absorbing rib plate is connected to the main cover body and covers the groove to form the water cooling channel.

In one embodiment, the cooling motor further comprises an impeller portion, wherein the impeller portion is arranged in the motor cavity and is connected to a rotating shaft of the cooling motor.

Compared with the prior art, the beneficial effects of this application are as follows:

the cooling motor of this application sets up heat-transfer device, with the heat conduction extremely in the bearing cavity of bearing between casing and the output shaft the motor cavity dispels the heat, prolongs bearing life and motor full-power operating time.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a partial cross-sectional view of a cooling motor provided in accordance with an embodiment of the present application;

FIG. 2 is a cross-sectional view of a heat transfer device for cooling an electric machine provided in accordance with an embodiment of the present application;

fig. 3 is a schematic structural diagram of an end cover of a cooling motor provided according to an embodiment of the present application.

In the figure, an end cover 1, a bearing mounting ring 2, a bearing 3, an annular cover 4, a heat conducting rod 5, a limiting block 51, a rod body 52, a heat conducting fin 6, an impeller part 7, a heat absorbing rib plate 8 and a water cooling channel 9.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, the embodiment of the present application provides a cooling motor, which includes a housing, a bearing mounting ring 2, a bearing 3, two annular covers 4 and a heat conducting device. In one embodiment, an end cover 1 is arranged at the end of the casing, a central hole is arranged on the end cover 1, and the casing and the end cover 1 enclose to form a motor cavity. The bearing mounting ring 2 is arranged on the central hole, the bearing mounting ring 2 can be annular, and the edge of the outer ring of the bearing mounting ring and the edge of the central hole in the end cover are attached and fixed through a fastener. The bearing 3 is connected to the bearing mounting ring 2. Two the annular lid 4 is established respectively the both sides of bearing 3, and two the annular lid 4 respectively with bearing collar 2 is connected for carry on spacingly to bearing 3.

Illustratively, both of the annular covers 4 are secured to the bearing mounting ring 2 by fasteners. Two the annular lid 4 encloses to close and forms the bearing chamber, can set up lubricating grease in the bearing chamber, and at the cooling motor operation in-process, bearing 3 produces a large amount of heats, and these heats concentrate in the bearing chamber, can't in time conduct away through lubricating grease. For solving the difficult problem of aforementioned bearing intracavity heat dissipation, this application has designed heat conduction device, and this heat conduction device runs through and is close to annular lid 4 of motor chamber one side, with heat conduction in the bearing intracavity extremely the motor chamber. The cooling motor of this embodiment sets up heat-transfer device, with the heat conduction in the bearing cavity of bearing 3 between casing and the output shaft extremely the motor cavity dispels the heat, prolongs 3 life of bearing and the full power operating time of motor.

In a possible embodiment, the heat conducting means comprise a heat conducting plate 6 and a plurality of heat conducting rods 5, the heat conducting plate 6 being arranged in the bearing cavity, the heat conducting rods 5 extending through the annular cover 4 to connect with the heat conducting plate 6. The heat conducting fin 6 absorbs heat generated by the bearing 3 in the bearing cavity and transfers the heat to the motor cavity through the heat conducting rod 5, so that the bearing 3 is cooled, and the service life of the bearing 3 is prolonged. In one implementation scenario, the heat conducting fins and the heat conducting rods can be made of metal materials, so that the heat dissipation performance is good. Preferably, the heat conducting fins and the heat conducting rods can be made of copper materials, and the copper materials are good in heat conducting performance and easy to absorb heat and dissipate heat. Based on the teachings of the present application, those skilled in the art will understand that the heat conducting fins and the heat conducting rods of the cooling motor of the present application can be made of other materials with good heat dissipation performance, and the present application is not limited thereto.

In a possible embodiment, the heat-conducting sheet 6 may be annular, and the heat-conducting sheet 6 may be disposed around the circumference of the bearing cavity. The needle heat-conducting fins 6 are arranged in a ring shape along the bearing 3, so that the contact area of the needle heat-conducting fins and the bearing is increased, and the heat exchange efficiency is improved. Therefore, the heat dissipation effect on the inner part of the bearing cavity is also improved. Furthermore, the heat conducting fins are arranged to be annular, so that the heat conducting fins can be uniformly distributed in the bearing cavity, and the uniformity of heat dissipation is improved. In one embodiment, the heat conductive sheet may be provided in a ring shape, and a fin structure may be provided in an extending direction thereof, whereby a heat exchange heat dissipation area may be further increased and heat dissipation efficiency may be improved.

In one implementation scenario, the aforementioned heat conducting device may include at least two heat conducting rods 5, and each of the heat conducting rods 5 is sequentially disposed around the circumference of the annular cover 4. With the increase of the number of the heat conducting rods 5, the heat dissipation effect can be further improved, and more heat conducting rods can play a better fixing effect on the heat conducting fins 6. Through setting up a plurality of heat conduction poles 5, this application has increased the connection of motor chamber and bearing chamber to heat transfer efficiency has been showing and has been improved. In addition, along with the increase of the number of the heat conducting rods 5, the connecting positions of the heat conducting rods and the heat conducting fins are increased, the heat conducting rods can fix the heat conducting fins effectively, and therefore the structural stability of the heat conducting fins is also improved.

In a possible embodiment, the annular cover 4 may be provided with a threaded hole communicating with the bearing cavity, the heat conduction rod 5 being screwed onto the threaded hole. Through this kind of threaded connection structure, this application has improved structural stability. Further, the heat conduction rod is fastened on the annular cover and fixedly connected with the heat conduction sheet, so that the structural stability can be improved, and the heat conduction rod and the heat conduction sheet are prevented from shaking.

In a possible embodiment, the heat conduction rod 5 may include a stopper 51 and a rod body 52 connected to the stopper 51. In one scenario, the rod 52 may be disposed through the annular cover 4, and the limiting block 51 is limited at an end of the annular cover 4 away from the heat conducting fin 6. Here, through the design of stopper, can be convenient for heat conduction pole 5 screw up to fix on annular lid 4. Further, the areas of the limiting blocks and the heat conducting fins of the heat conducting rods 5 are larger than those of the threaded holes, so that the heat conducting device cannot be separated from the annular cover body 4 in the high-speed running process of the motor, and the safety is improved. In one implementation scenario, the heat conducting rod 5 may be a solid structure, and a cavity may be disposed inside the heat conducting rod 5. The design of the cavity reduces the weight and improves the heat exchange efficiency. In one scheme, the cavity can penetrate through the limiting block 51 and the rod body 52, the heat dissipation area is increased due to the design of the cavity, and the heat dissipation efficiency is improved. Further, the one end that lies in the bearing chamber in the heat conduction pole 5 can be the blind end, and the one end that lies in the motor chamber in the heat conduction pole 5 can be the open end, and be wide-mouthed structure so that thermal transmission. Further, the cavity of the heat conduction rod 5 may be filled with heat conductive silicone grease, thereby improving heat dissipation performance. In addition, any structure is not required to be arranged in the cavity, and the inner wall of the cavity in the heat conducting rod can be provided with a concave-convex structure, so that the heat exchange area is increased, and the heat exchange efficiency is improved. For example, a threaded groove may be formed on an inner wall of the inner cavity of the heat conduction rod. The surface of the thread groove can be uneven, so that the inner surface area of the cavity is increased, namely, the heat exchange area is increased, and the heat dissipation effect is improved.

In the above scheme, the heat in the bearing cavity is only conducted to the motor cavity. In order to improve the self-cooling performance of the cooling motor, the structure of the cooling motor cavity is further arranged. Specifically, in a possible embodiment, a water cooling channel 9 is arranged in the end cover 1, and a heat absorption rib plate 8 is arranged on one surface of the end cover 1 facing the motor cavity. The heat absorption rib plate 8 can absorb heat in the motor cavity and transfer the heat to the water cooling channel 9. After that, the cooling liquid circulating in the water cooling channel 9 takes away the heat in the motor cavity. In one implementation scenario, the end cap 1 may be positioned close to the bearing to facilitate absorbing heat conducted from the bearing cavity to the motor cavity.

In one embodiment, the housing of the motor may further include a cylindrical outer wall, and a cooling structure may be disposed on the cylindrical outer wall to absorb heat in the cavity of the motor. For example, a spiral cooling water flow passage may be provided in the cylindrical outer wall around the circumferential direction. This cooling water flow channel extends the setting along cylindric outer wall spiral, and is covered with cylindric outer wall to increased heat exchange area, improved the radiating effect to the motor chamber from this.

In one embodiment, the end cap 1 may include a main cover. The main cover body is provided with a groove, and the heat absorption rib plate 8 is connected to the main cover body and covers the groove to form the water cooling channel 9. The design of the heat absorption rib plate increases the heat exchange area, improves the heat exchange efficiency, and conducts more heat to the water cooling channel 9, thereby achieving the purpose of rapid cooling. As an example, the material of the heat absorbing rib plate can be common material and similar to the material of the end cover, similar to the heat dissipating rib of the air cooling motor. Alternatively, the heat absorbing rib plates may be made of a material with better heat conductivity to improve the heat dissipation effect, for example, the heat absorbing rib plates may be made of a copper material.

Furthermore, the section of the heat absorption rib plate 8 is in a T shape, and the heat absorption rib plate 8 comprises a connecting rib parallel to the main cover plate and a heat absorption rib vertical to the connecting rib. The connecting ribs can be in a sheet shape, are connected to the main cover body and cover the grooves. And the heat absorption rib is connected on the connecting rib and protrudes out of the surface of the end cover so as to increase the heat absorption area. When in use, the connecting ribs and the heat absorbing ribs can absorb heat, and the cross sections of the connecting ribs and the heat absorbing ribs are in a T-shaped matching structure to increase the heat absorbing area. In one scenario, a plurality of annular grooves may be disposed on the main cover body around the circumferential direction, and each annular groove is sequentially disposed from the center of the main cover body to the outer circumference. The annular grooves can be connected or isolated, namely a plurality of cooling pipelines are connected in parallel.

In one embodiment, the motor may further comprise an impeller portion 7. The impeller portion 7 is disposed in the motor cavity and is connected to the rotating shaft of the cooling motor. In operation, the impeller portion 7 may blow heat away from the heat conducting rod 5 and the motor core within the motor cavity to prevent heat from concentrating and further increase the cooling rate. As an example, the air outlet end of the impeller portion 7 may be directed toward the main cover side to drive the dissipated heat toward the cover side, thereby increasing the contact of the heat and the heat absorbing ribs and thus improving the heat exchange efficiency.

The working principle of the cooling motor is explained as follows:

during high speed rotation of the motor, a large amount of heat will be generated at the location of the bearing 3 and concentrated in the bearing cavity. Thereafter, the heat conducting fins 6 absorb heat in the bearing cavity and conduct it to the motor cavity through the heat conducting rod 4. Because the motor cavity space is great, it can cushion the heat to prevent that the heat from concentrating in the bearing cavity. After each heat conducting rod 4 conducts heat into the motor cavity, the impeller part 7 in the motor cavity rotates along with the rotating shaft of the motor to drive air in the motor cavity to flow, and circulating airflow is formed to prevent heat from being concentrated. The cooling structure on the motor housing can then absorb and dissipate heat within the motor cavity. The heat absorption rib plates 8 on the end cover 1 absorb heat and transfer the heat into the water cooling channel 9, and the heat is transferred to the cooling liquid to be discharged to the outside of the motor. The cooling motor of this application can be with the heat conduction of the bearing intracavity of bearing between casing and the output shaft extremely through setting up heat conduction the motor chamber dispels the heat to 3 life of extension bearing and motor full power operating time.

In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

From the above description of the present specification, those skilled in the art will also understand the terms used below, terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise" are based on the orientation or positional relationship shown in the drawings of the present specification, it is for the purpose of facilitating the explanation of the invention and simplifying the description, and it is not intended to state or imply that the devices or elements involved must be in the particular orientation described, constructed and operated, therefore, the above terms of orientation or positional relationship should not be interpreted or interpreted as limiting the present invention.

In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The following claims are intended to define the scope of the invention and, therefore, to cover module compositions, equivalents, or alternatives falling within the scope of these claims.

Claims

1. A cooled electric machine, comprising:

the end part of the shell is provided with an end cover, and the end cover is provided with a central hole; the shell and the end cover enclose to form a motor cavity;

a bearing mounting ring disposed on the central bore;

the bearing is connected to the bearing mounting ring;

the two annular covers are respectively arranged on two sides of the bearing and are respectively connected with the bearing mounting ring; the two annular covers enclose to form a bearing cavity;

and the heat conduction device penetrates through the annular cover close to one side of the motor cavity so as to conduct heat in the bearing cavity to the motor cavity.

2. The cooling motor of claim 1, wherein the heat conducting means includes a heat conducting plate disposed in the bearing cavity and a plurality of heat conducting rods extending through the annular cover to connect with the heat conducting plate.

3. The cooling motor of claim 2, wherein the heat-conducting fins are annular, and the heat-conducting fins are arranged around a circumference of the bearing cavity.

4. The cooling motor of claim 2, wherein the heat conducting means includes at least two heat conducting rods, each of the heat conducting rods being disposed in sequence around a circumference of the annular cover.

5. The cooling motor of claim 2, wherein the annular cover is provided with a threaded hole communicating with the bearing cavity, and the heat conducting rod is screwed in the threaded hole.

6. The cooling motor of claim 2, wherein the heat conducting rod comprises a limiting block and a rod body connected to the limiting block, the rod body is disposed through the annular cover, and the limiting block is limited at an end of the annular cover facing away from the heat conducting strip.

7. The cooling motor of claim 2, wherein the heat conducting rod has a cavity.

8. The cooling motor according to claim 1, wherein a water cooling channel is arranged in the end cover, and a heat absorbing rib plate is arranged on one surface of the end cover facing the motor cavity.

9. The cooling motor according to claim 8, wherein the end cover includes a main cover body, a groove is formed in the main cover body, and the heat absorbing rib is connected to the main cover body to cover the groove to form the water cooling channel.

10. The cooling motor of claim 1, further comprising an impeller portion disposed within the motor cavity, the impeller portion being coupled to a shaft of the cooling motor.