CN211930406U

CN211930406U - Motor end cover

Info

Publication number: CN211930406U
Application number: CN202020799880.4U
Authority: CN
Inventors: 罗英露; 邢中辉; 李伟业; 冯守智; 何思源; 盛振强; 刘雄; 明帅帅; 杨慧强
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-11-13
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a motor end cover, including the end cover body, the center of end cover body is equipped with the dead eye, the inside of end cover body is equipped with curved cooling channel, cooling channel establishes the circumference at the dead eye, cooling channel's both ends are equipped with passageway entry and passageway export, passageway entry and passageway export are all established on the circumference face of end cover body. The utility model discloses an inside cooling channel that sets up of motor end cover, cooling channel set up in the circumference of dead eye, and cooling channel can directly cool off the bearing, promotes the heat-sinking capability of bearing by a wide margin, has prolonged the motor life-span, can promote motor power simultaneously.

Description

Motor end cover

Technical Field

The utility model relates to a permanent-magnet machine water-cooling technique especially relates to a motor end cover.

Background

The permanent magnet synchronous motor has the advantages of high power density, high efficiency, light weight, small volume, good controllability and the like, is applied more and more in the field of rail transit, and has good application prospect. The permanent magnet synchronous motor generally adopts a fully-closed structure, the heat dissipation of components such as a motor bearing, a rotor and the like is difficult, the local high temperature of the rotor is easily caused, and the irreversible demagnetization of a permanent magnet can be caused in serious conditions, so that the safe operation of the motor is influenced, and therefore, for the permanent magnet synchronous traction motor, finding a good motor cooling mode is a key factor for improving the power exertion of the permanent magnet synchronous traction motor.

The existing air cooling motor is characterized in that under the rotating action of a fan, cooling air is sucked into a ventilation hole of a rear end cover from a screen plate and then flows through a ventilation channel on the outer wall of a stator, and flows out from the ventilation hole of a front end cover. The cooling air takes away the heat generated by the winding and the stator core to cool the winding and the stator core, and the air-cooled motor has the defects of non-ideal heat dissipation effect and high noise.

The existing water-cooled motor is more and more applied due to the advantages of high cooling efficiency and low noise. Usually, a cooling water channel is arranged inside the water-cooled motor shell. The cooling water channel can take away heat of a stator iron core and a winding through contact of the shell and the stator, and has the defects that components such as a rotor, a bearing and the like cannot be directly cooled, the heat dissipation condition is poor, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a motor end cover that can direct cooling bearing, promote the heat-sinking capability of bearing by a wide margin.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a motor end cover, includes the end cover body, the center of end cover body is equipped with the dead eye, the inside of end cover body is equipped with curved cooling channel, cooling channel establishes the circumference at the dead eye, cooling channel's both ends are equipped with passageway entry and passageway export, passageway entry and passageway export are all established on the circumference face of end cover body.

As a further improvement of the above technical solution, the width of the cooling channel is larger than the width of the channel inlet.

As a further improvement of the above technical solution, the width of the cooling channel is larger than the width of the channel outlet.

As a further improvement of the technical scheme, the cooling channels are equal in width.

As a further improvement of the above technical solution, the cooling channel is circular arc-shaped.

As a further improvement of the above solution, the cooling channel is concentric with the bearing bore.

As a further improvement of the technical scheme, the channel inlet and the channel outlet are respectively arranged at two sides of the end cover body.

As a further improvement of the technical scheme, the channel inlet and the channel outlet are arranged on the same side of the end cover body.

As a further improvement of the technical scheme, the channel inlet is in a straight line shape, and transition fillets are arranged between the channel inlet and the cooling channel.

As a further improvement of the technical scheme, the channel outlet is in a linear type, and a transition fillet is arranged between the channel outlet and the cooling channel.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a motor end cover, the inside of end cover body is equipped with curved cooling channel, and this cooling channel sets up in the circumference of dead eye, and cooling channel can the direct cooling bearing, promotes the heat-sinking capability of bearing by a wide margin, compares with current air-cooled motor and water-cooled motor, and this motor end cover can high-efficiently utilize end cover structure to promote the heat-sinking capability of key parts such as bearing, rotor, reduces the temperature of bearing, permanent magnet, promotes motor life-span and reliability, can promote motor power simultaneously.

Drawings

Fig. 1 is an internal structural schematic diagram of a motor end cover according to embodiment 1 of the present invention.

Fig. 2 is an end view of a motor end cover according to embodiment 1 of the present invention.

Fig. 3 is an end view of a motor end cover according to embodiment 2 of the present invention.

The reference numerals in the figures denote:

1. an end cap body; 2. a bearing bore; 3. a cooling channel; 4. a channel inlet; 5. a channel outlet; 6. and (4) transition fillets.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples.

Example 1

As shown in fig. 1 and fig. 2, the motor end cover of the present embodiment includes an end cover body 1, a bearing hole 2 is provided in the center of the end cover body 1, an arc-shaped cooling channel 3 is provided inside the end cover body 1, the cooling channel 3 is provided in the circumferential direction of the bearing hole 2, channel inlets 4 and channel outlets 5 are provided at two ends of the cooling channel 3, and the channel inlets 4 and the channel outlets 5 are both provided on the circumferential surface of the end cover body 1.

The great cooling water course of cooling area, this cooling channel 3 set up in the circumference of dead eye 2, can directly cool off the bearing (install in dead eye 2 department), and cooling water takes away the heat in the cooling channel 3 of end cover is introduced from passageway entry 4, flows out from passageway export 5. In fig. 1, Q1 represents the heat of the stator winding, the rotor and the like in the motor, and is taken away by the cooling water in the cooling channel 3 after being transferred to the end cover body 1, and Q2 represents the heat of the bearing, and because the end cover body 1 is in direct contact with the bearing, the cooling channel 3 can directly take away the heat of cooling the bearing, thereby greatly improving the heat dissipation capacity of the bearing. Compared with the existing air-cooled motor and water-cooled motor, the motor end cover can efficiently utilize the end cover structure to improve the heat dissipation capacity of key components such as bearings and rotors, reduce the temperature of the bearings and permanent magnets, prolong the service life and reliability of the motor, and improve the power of the motor.

In this embodiment, the width of the cooling channel 3 is greater than the width of the channel inlet 4. The width of the cooling channel 3 is greater than the width of the channel outlet 5. The cooling capacity can be increased by making the width of the cooling passage 3 large. For ease of manufacture, the cooling channels 3 are of equal width and the cooling channels 3 are of tubular shape.

In this embodiment, the cooling passage 3 is circular and concentric with the bearing hole 2. The channel inlet 4 and the channel outlet 5 are respectively arranged on two sides of the end cover body 1, namely the cooling channel 3 is semicircular.

In this embodiment, the channel inlet 4 is linear, and a transition fillet 6 is provided between the channel inlet 4 and the cooling channel 3. The channel outlet 5 is linear and there is a rounded transition 6 between the channel outlet 5 and the cooling channel 3. The straight line type channel inlet 4 and channel outlet 5 facilitate the connection with external pipes.

Example 2

As shown in fig. 3, the motor end cover of the present embodiment is different from embodiment 1 only in that:

in this embodiment, the channel inlet 4 and the channel outlet 5 are provided on the same side of the end cap body 1. I.e. the cooling channel 3 is almost fully circular, the two ends of the cooling channel 3 are not connected, and the channel inlet 4 and the channel outlet 5 are adjacent. Meanwhile, the cooling area of the full-circular cooling channel 3 is large, the temperature of the inner space of the motor can be greatly reduced, and the power of the motor can be further improved.

The rest of the process is substantially the same as that of embodiment 1, and the description thereof is omitted.

The utility model discloses a cooling channel 3 can set to full circumferencial direction or partial angle according to actual need, like 90 circular arcs, 180 circular arcs or 270 circular arcs etc. adjust according to cooling capacity, satisfy the actual heat dissipation demand of different motors, also can select to design cooling channel 3 for different shapes, like square tube shape, variable curvature arc etc..

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. A motor end cover is characterized in that: including end cover body (1), the center of end cover body (1) is equipped with dead eye (2), the inside of end cover body (1) is equipped with curved cooling channel (3), the circumference in dead eye (2) is established in cooling channel (3), the both ends of cooling channel (3) are equipped with passageway entry (4) and passageway export (5), passageway entry (4) and passageway export (5) are all established on the circumference face of end cover body (1).

2. The motor end cap of claim 1, wherein: the width of the cooling channel (3) is greater than the width of the channel inlet (4).

3. The motor end cap of claim 2, wherein: the width of the cooling channel (3) is greater than the width of the channel outlet (5).

4. A motor end cap according to any one of claims 1 to 3, wherein: the cooling channels (3) are of equal width.

5. The motor end cap of claim 4, wherein: the cooling channel (3) is arc-shaped.

6. The motor end cap of claim 5, wherein: the cooling channel (3) is concentric with the bearing hole (2).

7. A motor end cap according to any one of claims 1 to 3, wherein: the channel inlet (4) and the channel outlet (5) are respectively arranged on two sides of the end cover body (1).

8. A motor end cap according to any one of claims 1 to 3, wherein: the channel inlet (4) and the channel outlet (5) are arranged on the same side of the end cover body (1).

9. A motor end cap according to any one of claims 1 to 3, wherein: the channel inlet (4) is linear, and a transition fillet (6) is arranged between the channel inlet (4) and the cooling channel (3).

10. A motor end cap according to any one of claims 1 to 3, wherein: the channel outlet (5) is linear, and a transition fillet (6) is arranged between the channel outlet (5) and the cooling channel (3).