CN102790473A - Disc-type permanent magnet motor with sealed cooling structure - Google Patents

Abstract

A disc-type permanent magnet motor with a closed cooling structure, including a casing, a driving side end cover and a non-driving side end cover arranged on both sides of the casing, and a shaft hole is arranged in the center of the driving side end cover and the non-driving side end cover, Windings are respectively installed on the driving side end cover and the non-driving side end cover, and a rotating shaft is arranged between the two shaft holes. Cover water channel I and end cover water channel II, the outlet of end cover water channel I and the inlet of end cover water channel II are respectively located on the outer edge of the driving side end cover and the non-driving side end cover, and the end cover on the driving side is provided with end cover water channel I The water inlet connected to the inlet is provided with a water outlet connected to the outlet of the water channel II of the end cover on the non-driving side end cover, and the outlet of the water channel I of the end cover and the inlet of the water channel II of the end cover are connected through multiple straight water channels uniformly distributed along the circumference of the machine. The advantages are: fast heat dissipation, good cooling effect, high power density, long service life, balanced temperature of each component, and will not be burned due to local overheating.

Description

Closed cooling structure disc permanent magnet motor

technical field

The invention relates to a disc type permanent magnet motor with a closed cooling structure.

Background technique

The disc permanent magnet motor has the characteristics of simple structure, small size, light weight and high efficiency. Rotor with permanent magnets. Most of the existing disc permanent magnet motors are open structures, which are cooled by natural air cooling, and the heat generated by the windings and the stator core is dissipated through the stator core and the end cover. Compared with the radial structure motor, this heat dissipation method has the following defects: 1. The open structure easily causes the permanent magnet to be corroded, shortening the service life of the disc permanent magnet motor. 2. The heat dissipation method of natural air cooling requires a ventilated, cool and dry environment, and the layout of the disc permanent magnet motor is difficult to meet the above environmental requirements. 3. The heat dissipation area of the disc permanent magnet motor is much smaller than that of the radial structure motor, the heat dissipation speed is slow, and the winding temperature rises, which limits the improvement of the power density of the disc permanent magnet motor.

In order to solve the above-mentioned defects, CN102185392A discloses a magnetic gathering type disc permanent magnet torque motor with fluid cooling. The outer side of the magnetic isolation plate of the motor is provided with a cooling liquid flow cavity. liquid for cooling the windings. The disadvantages of this cooling method are: 1. The fluid cooling has a small area of action and can only cool the windings. The temperature of each part in the disc permanent magnet motor is uneven, which can easily lead to local overheating and burn the motor. 2. The cavity of the coolant flow chamber has a large capacity, and the newly injected coolant is mixed in the coolant flow chamber, and the temperature rises, resulting in a small temperature difference between the coolant and the winding, and poor cooling effect.

Contents of the invention

The technical problem to be solved by the present invention is to provide a closed cooling structure disc permanent magnet motor with fast heat dissipation, good cooling effect, high power density, long service life, uniform temperature of each component, and will not be burned due to local overheating.

The present invention is achieved like this:

A disc-type permanent magnet motor with a closed cooling structure, including a casing, a driving side end cover and a non-driving side end cover arranged on both sides of the casing, and shaft holes are respectively arranged in the centers of the driving side end cover and the non-driving side end cover , windings are respectively installed on the drive side end cover and non-drive side end cover, and a rotating shaft is provided between the two shaft holes. Shaped end cover water channel I and end cover water channel II, the outlet of end cover water channel I and the inlet of end cover water channel II are respectively located on the outer edge of the driving side end cover and the non-driving side end cover, and the end cover on the driving side is provided with the end cover The water inlet connected to the inlet of the water channel I is provided with a water outlet connected to the outlet of the end cover water channel II on the non-driving side end cover, and the outlet of the end cover water channel I and the inlet of the end cover water channel II pass through multiple straight water channels evenly distributed along the circumference of the machine connected.

The direction of rotation of the end cap water channel I and the end cap water channel II is opposite to improve cooling efficiency.

The water inlet and water outlet are close to the shaft hole.

The rotation direction of the end cap water channel I is clockwise, and the rotation direction of the end cap water channel II is counterclockwise, so as to achieve an optimal cooling effect.

The two ends of the straight water channel in the machine are connected in parallel through collecting and distributing pipes to reduce the flow resistance of the cooling water and improve the cooling efficiency.

The connection between the straight water channel in the machine and the collecting and distributing pipe is curved to reduce the resistance when the cooling water enters the straight water channel in the machine from the collecting and distributing pipe.

The beneficial effects of the present invention are:

1. The water cooling method is adopted, and the cooling water passes through the end cover water channel I, the straight water channel in the machine, and the end cover water channel II, which does not occupy the space inside the machine, and maximizes the maximum size without affecting the operation of the disc permanent magnet motor. The heat dissipation area is reduced, the heat dissipation speed is fast, and the power density is high.

2. The disc permanent magnet motor has a closed structure. Due to the water cooling method, the external environmental conditions have little influence on the cooling effect, and the installation position is not restricted by the environment; The service life of the disc permanent magnet motor is extended.

3. The temperature of the disc permanent magnet motor decreases gradually from the driving side to the non-driving side. As the cooling water passes through the end cover water channel I, the machine straight water channel, and the end cover water channel II in sequence, its temperature gradually rises from the water inlet. High, contrary to the internal temperature distribution of the disc permanent magnet motor, it can effectively balance the temperature of the various parts of the motor and avoid burning out the motor due to local overheating.

4. Since the water channel of the end cover is spiral and the straight water channel inside the machine is straight, the cooling water stays in the water channel of the end cover for a long time and the straight water channel of the machine for a short time. Because the main heating parts of the disc permanent magnet motor For the driving side winding, the temperature difference between the cooling water and the driving side winding is large enough when the cooling water just enters, and the cooling water stays in the end cover for a long time, which can fully perform heat exchange; when the cooling water enters the straight water channel inside the machine, its temperature rises, The temperature difference with the air inside the disc permanent magnet motor is small, and the cooling effect can still be guaranteed due to the short residence time of the cooling water; when the cooling water enters the end cover of the non-driving side, although the temperature of the cooling water rises further, it is still lower than that of the non-driving side. side winding temperature, the cooling water can still cool down the non-drive side winding through the spiral end cover water channel II with a large cooling area; the closed cooling structure disc permanent magnet motor has a reasonable structure design, makes full use of cooling water, and has a good cooling effect. Energy saving.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of cooling system in Fig. 1;

Fig. 3 is a schematic structural view of the driving side end cover in Fig. 2;

Fig. 4 is a schematic structural view of the non-driving side end cover in Fig. 2;

Fig. 5 is the structural representation of straight water channel in the machine in Fig. 2;

Fig. 6 is an enlarged view of part A in Fig. 5 .

In the figure: drive side end cover 1, shaft hole 2, water inlet 3, end cover water channel Ⅰ4, machine straight water channel 5, non-drive side end cover 6, water outlet 7, casing 8, winding 9, rotating shaft 10, end Cover the water channel II11 and the collecting and distributing pipe 12.

Detailed ways

As shown in the figure, the disc permanent magnet motor with a closed cooling structure includes a casing 8, a driving side end cover 1 and a non-driving side end cover 6 arranged on both sides of the casing 8, and the driving side end cover 1 and the non-driving side The center of the end cover 6 is provided with a shaft hole 2 respectively, and windings 9 are respectively installed on the driving side end cover 1 and the non-driving side end cover 6, and the two windings 9 are respectively the driving side winding and the non-driving side winding. A rotating shaft 10 is arranged between the holes 2 . In the end cover 1 on the driving side and the end cover 6 on the non-driving side, a spiral end cover water channel I4 and an end cover water channel II11 are respectively provided. The rotation directions of the end cover water channel I4 and the end cover water channel II11 are opposite. In this embodiment , the rotation direction of the end cover water channel I4 is clockwise, and the rotation direction of the end cover water channel II11 is counterclockwise. The outlet of the end cover water channel I4 and the inlet of the end cover water channel II11 are respectively located on the outer edge of the driving side end cover 1 and the non-driving side end cover 6, and the driving side end cover 1 is provided with a water inlet 3 communicating with the inlet of the end cover water channel I4 , the non-driving side end cover 6 is provided with a water outlet 7 communicating with the outlet of the end cover water channel II11, the end cover water channel I4 outlet, and the end cover water channel II11 inlet are connected through multiple straight water channels 5 evenly distributed along the circumference of the machine. The two ends of the straight water channel 5 in the machine are connected in parallel through the collecting and distributing pipe 12, and the connection between the straight water channel 5 in the machine and the collecting and distributing pipe 12 is in the shape of an angle.

When in use, pour cooling water into the water inlet 3, and the cooling water passes through the spiral end cover water channel I4 to cool the driving side winding 9; The air inside the motor performs heat exchange; after that, the cooling water enters the non-driving side end cover 6 to cool down the non-driving side winding 9, and then is discharged from the water outlet 7.

Claims (6)

1. A disc-type permanent magnet motor with a closed cooling structure, including a casing, a driving side end cover and a non-driving side end cover arranged on both sides of the casing, and a center of the driving side end cover and the non-driving side end cover respectively. Shaft holes, windings are respectively installed on the drive side end cover and non-drive side end cover, and a rotating shaft is arranged between the two shaft holes. Spiral end cover water channel I and end cover water channel II, the outlet of end cover water channel I and the inlet of end cover water channel II are respectively located on the outer edge of the driving side end cover and the non-driving side end cover, and the drive side end cover is provided with end caps. The water inlet connected to the inlet of the cover water channel Ⅰ is provided on the non-driving side end cover with the water outlet connected to the outlet of the end cover water channel Ⅱ. Waterways are connected. 2. The disc-type permanent magnet motor with closed cooling structure according to claim 1, characterized in that: the direction of rotation of the end cover water channel I and the end cover water channel II is opposite. 3. The disc permanent magnet motor with closed cooling structure according to claim 1, characterized in that: the water inlet and water outlet are close to the shaft hole. 4. The disc-type permanent magnet motor with closed cooling structure according to claim 2, characterized in that: the rotation direction of the end cover water channel I is clockwise, and the rotation direction of the end cover water channel II is counterclockwise. 5. The disc-type permanent magnet motor with closed cooling structure according to claim 1, characterized in that: both ends of the straight water channel in the machine are connected in parallel through collecting and distributing pipes. 6. The disc-type permanent magnet motor with closed cooling structure according to claim 5, characterized in that: the connection between the straight water channel in the machine and the collecting and distributing pipe is in the shape of an angle.

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