Motor cooling structure

Abstract

The utility model discloses motor cooling structure belongs to motor field, including rotor, pivot and bearing, pivot fixed mounting is in rotor and rotates with rotor, bearing installs in pivot and is located rotor side part, and the pivot is hollow structure, and the flow channel that extends along the axial direction is formed in the pivot, and the side wall on the pivot still is equipped with through -hole, and the through -hole is through -hole and the through -hole is communicated with the flow channel, and the rotor includes end ring, and the end of end ring is equipped with end groove, and the position of through -hole is opposite with the position of end groove, and the cooling liquid in flow channel flows from through -hole to end groove, and end groove makes cooling liquid change direction and flow to bearing, through above -mentioned design, the bearing of installing on the pivot can effectively carry out the cooling, improves the service life of bearing.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to motor cooling structures. Background Technology

[0002] An electric motor consists of a stator and a rotor, with the rotor being the rotating part of the motor. The working principle of the motor rotor is based on the principles of electromagnetic induction and electromagnetic force. When the stator is energized and generates a rotating magnetic field, the conductors (windings or squirrel cage bars) in the rotor are induced with current in the magnetic field. These induced currents interact with the stator magnetic field to generate electromagnetic torque, thereby causing the rotor to start rotating.

[0003] Rotors generate heat during operation and require heat dissipation. Existing oil-cooled motor rotors actively cool the rotor by making the shaft hollow and circulating coolant through it. However, the cooling effect on the bearings mounted on the shaft is generally limited, leaving the bearings to operate in a high-temperature environment for extended periods, thus affecting their service life. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a motor cooling structure that can effectively cool down the bearings on the rotating shaft.

[0005] One of the objectives of this utility model is achieved through the following technical solution:

[0006] The motor cooling structure includes a rotor, a shaft, and a bearing. The shaft is fixedly installed on the rotor and rotates with it. The bearing is installed on the shaft and located on the side of the rotor. The shaft is a hollow structure with an axially extending flow channel inside. A through hole is also provided on the side wall of the shaft, which is a through hole and communicates with the flow channel. The rotor includes an end ring with an end groove at its end. The position of the through hole is opposite to the position of the end groove. Coolant in the flow channel flows out from the through hole to the end groove, and the end groove causes the coolant to flow in a different direction to the bearing.

[0007] Furthermore, the end groove includes a sidewall, which is inclined.

[0008] Furthermore, the sidewall is inclined in a direction toward the rotating shaft and away from the bearing.

[0009] Furthermore, the end groove is a dovetail groove.

[0010] Furthermore, there are multiple through holes, and the multiple through holes are evenly distributed at intervals along the circumference of the rotating shaft.

[0011] Furthermore, the multiple through holes are divided into two groups, and there are two end rings and two bearings. The positions of the two groups of through holes correspond to the positions of the two end rings.

[0012] Furthermore, the rotor is located between the two bearings.

[0013] Furthermore, the bearing is coaxially arranged with the end ring, and a gap is formed between the bearing and the end ring.

[0014] Furthermore, the rotor also includes an iron core and guide bars, the iron core, the guide bars and the end ring are integrally formed, and the iron core is fixedly connected to the rotating shaft.

[0015] Compared with the prior art, the motor cooling structure of this utility model includes a rotor, a shaft, and a bearing. The shaft is fixedly installed on the rotor and rotates with the rotor. The bearing is installed on the shaft and located on the side of the rotor. The shaft has a hollow structure with an axially extending flow channel inside. A through hole is also provided on the side wall of the shaft. The through hole is a through hole and communicates with the flow channel. The rotor includes an end ring with an end groove at its end. The position of the through hole is opposite to the position of the end groove. Coolant in the flow channel flows out from the through hole to the end groove. The end groove causes the coolant to flow in a different direction to the bearing. Through the above design, the bearing installed on the shaft can be effectively cooled, thus improving the service life of the bearing. Attached Figure Description

[0016] Figure 1 This is a perspective view of the motor cooling structure of this utility model;

[0017] Figure 2 for Figure 1 A three-dimensional view of the motor cooling structure's rotating shaft;

[0018] Figure 3 for Figure 1 A three-dimensional sectional view of the rotor of the motor cooling structure;

[0019] Figure 4 for Figure 1 A cross-sectional view of the motor cooling structure.

[0020] In the diagram: 10, rotor; 11, iron core; 12, end ring; 120, end slot; 121, side wall; 13, guide bar; 20, shaft; 21, flow channel; 22, through hole; 30, bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please see Figures 1 to 4 The motor cooling structure of this utility model is used to cool the bearing 30. The motor cooling structure includes a rotor 10, a shaft 20, and a bearing 30.

[0025] The rotor 10 includes an iron core 11, two end rings 12, and multiple guide bars 13. The iron core 11, two end rings 12, and multiple guide bars 13 are integrally formed. The two end rings 12 are located at both ends of the iron core 11 and are parallel to each other. Each end ring 12 has an end groove 120, which is located at the end edge of the end ring 12. The end groove 120 is used to change the direction of the coolant flowing out of the through hole 22, so that it flows to the bearing 30 to cool the bearing 30. Specifically, the end groove 120 includes a side wall 121, which is inclined. The side wall 121 is inclined towards the rotating shaft 20 and the inclined surface faces away from the bearing 30. In this embodiment, the end groove 120 is a dovetail groove. The guide bars 13 connect the two end rings 12, and the multiple guide bars 13 are parallel to each other and spaced apart, and the multiple guide bars 13 are located on a circle. The iron core 11 is fixed to the rotating shaft 20.

[0026] The rotating shaft 20 has a hollow structure, with a flow channel 21 formed inside. The flow channel 21 is used for coolant flow to cool the rotating shaft 20 and the rotor 10. The rotating shaft 20 also has through holes 22, which are located on the side wall of the rotating shaft 20 and are through holes. The through holes 22 allow the coolant in the flow channel 21 to flow out. Specifically, there are multiple through holes 22, which are divided into two groups and located at both ends of the rotating shaft 20, respectively. The positions of the two groups of through holes 22 correspond to the positions of the end grooves 120. Each group of through holes 22 is arranged circumferentially along the rotating shaft 20.

[0027] Bearing 30 is mounted on the rotating shaft 20 and is located on one side of the end ring 12. A gap is formed between bearing 30 and end ring 12. In this embodiment, there are two bearings 30, which are located on both sides of the rotor 10.

[0028] When using the motor cooling structure, the coolant flows inside the rotating shaft 20. When the coolant flows to the through hole 22, it flows out from the through hole 22 and sprays onto the end groove 120 of the end ring 12. The end groove 120 changes the flow direction of the coolant, and the coolant is sprayed onto the bearing 30 to cool the bearing 30.

[0029] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A motor cooling structure, comprising a rotor, a shaft, and a bearing, wherein the shaft is fixedly mounted on the rotor and rotates with the rotor, and the bearing is mounted on the shaft and located on the side of the rotor, characterized in that: The rotating shaft has a hollow structure, and an axially extending flow channel is formed inside the rotating shaft. A through hole is also provided on the side wall of the rotating shaft. The through hole is a through hole and communicates with the flow channel. The rotor includes an end ring, and an end groove is provided at the end of the end ring. The position of the through hole is opposite to the position of the end groove. Coolant in the flow channel flows out from the through hole to the end groove. The end groove causes the coolant to flow in a different direction to the bearing.

2. The motor cooling structure according to claim 1, characterized in that: The end groove includes a sidewall, which is inclined.

3. The motor cooling structure according to claim 2, characterized in that: The sidewall is inclined toward the shaft and away from the bearing.

4. The motor cooling structure according to claim 1, characterized in that: The end groove is a dovetail groove.

5. The motor cooling structure according to claim 1, characterized in that: The number of through holes is multiple, and the multiple through holes are evenly distributed at intervals along the circumference of the rotating shaft.

6. The motor cooling structure according to claim 5, characterized in that: The multiple through holes are divided into two groups, and there are two end rings and two bearings. The positions of the two groups of through holes correspond to the positions of the two end rings.

7. The motor cooling structure according to claim 6, characterized in that: The rotor is located between the two bearings.

8. The motor cooling structure according to claim 1, characterized in that: The bearing is coaxially arranged with the end ring and a gap is formed between the bearing and the end ring.

9. The motor cooling structure according to claim 1, characterized in that: The rotor also includes an iron core and guide bars. The iron core, the guide bars and the end ring are integrally formed, and the iron core is fixedly connected to the rotating shaft.

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