CN215580591U - Rotor subassembly and have its motor - Google Patents

Abstract

The application provides a rotor assembly and a motor with the same, comprising a rotor core; the rotor baffle is arranged at the end part of the rotor core, and the rotor baffle is provided with a heat dissipation part; the heat conducting part is used for guiding heat on the rotor iron core to be transferred to the heat radiating part. According to the rotor subassembly of this application and motor that has it, the rotor is cooled off to effectual.

Description

Rotor subassembly and have its motor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a rotor assembly and a motor with the same.

Background

At present, a high-speed permanent magnet synchronous motor has various advantages of high power density, good dynamic response, simple structure and the like, and becomes one of the research hotspots in the international electrotechnical field.

However, since the rotor operates at a high frequency for a long period of time, the rotor core generates a large eddy current loss to generate a large amount of heat, which causes a sharp rise in the rotor temperature, so that the permanent magnets increase in temperature. If the whole system can not radiate heat in time or the cooling effect is not good, the permanent magnet can be subjected to high-temperature irreversible demagnetization. Therefore, for high power high speed motors, it is necessary to enhance the cooling of the rotor.

Therefore, how to provide an effective rotor assembly for cooling the rotor and a motor having the same become a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide a rotor assembly and a motor having the same, which effectively cools a rotor.

In order to solve the above problems, the present application provides a rotor assembly including:

a rotor core;

the rotor baffle is arranged at the end part of the rotor core, and a heat dissipation part is arranged on the rotor baffle;

and the heat conducting part is used for guiding heat on the rotor iron core to be transferred to the heat radiating part.

The heat dissipation part further comprises heat dissipation fins, and the heat dissipation fins are arranged on the outer periphery of the rotor baffle to form fan blades.

Furthermore, the radial height of the radiating fins on the rotor baffle is h, wherein h is less than or equal to 10 mm;

and/or the number of the radiating fins is 24, and the 24 radiating fins are uniformly arranged around the circumference of the rotor baffle.

Further, the heat conducting portion is arranged inside the rotor core and extends to the rotor baffle.

Further, the number of the heat conduction portions is set to be at least two, and the at least two heat conduction portions are sequentially arranged around the circumferential direction of the rotor core.

Further, the number of the heat conduction portions is set to 36, and the 36 heat conduction portions are uniformly arranged around the circumference of the rotor core.

Further, the heat conducting portion includes heat conducting groove and heat conductor, and the heat conducting groove includes guide hole and guide slot, and the guide hole sets up inside rotor core to run through rotor core in the axial, the guide slot sets up on rotor baffle, the notch and the guide hole intercommunication of guide slot, the heat conductor sets up in the heat conducting groove.

Further, the heat conductor is a good conductor of heat.

Further, the heat conductor is a heat pipe or a copper column.

According to yet another aspect of the present application, there is provided an electric machine comprising a rotor assembly as described above.

The application provides a rotor subassembly and have its motor is favorable to taking rotor baffle department with rotor core's heat to the heat dissipation portion through rotor baffle department gives off the heat on with rotor core, can reach effectual rotor and carry out refrigerated effect.

Drawings

Fig. 1 is a schematic structural view of a rotor core according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a rotor baffle according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional view illustrating a rotor assembly according to an embodiment of the present invention.

The reference numerals are represented as:

1. a rotor core; 2. a rotor baffle; 21. a heat dissipating section; 3. a heat conducting portion; 31. a heat conducting groove; 32. a heat conductor; 4. a bearing rotor; 5. a rotating shaft.

Detailed Description

Referring to fig. 1 in combination, a rotor assembly includes a rotor core 1; the rotor baffle 2 is arranged at the end part of the rotor core 1, and the heat dissipation part 21 is arranged on the rotor baffle 2; the heat conduction portion 3 guides heat on the rotor core 1 to be transferred to the heat dissipation portion 21. The rotor baffle 2 is favorable for bringing the heat of the rotor core 1 to the heat dissipation part 21 at the rotor baffle 2 distributes the heat of the rotor core 1, and the effect of effectively cooling the rotor can be achieved.

Referring to fig. 2 in combination, the present application also discloses some embodiments, the heat dissipation portion 21 includes heat dissipation fins, and the heat dissipation fins are disposed on the outer periphery of the rotor guard 2 to form fan blades. When the rotor runs at a high speed, the rotor generates air pressure difference in the axial direction, the flow of cooling liquid such as a refrigerant is accelerated, the flow speed of the cooling liquid is faster, and the rotor core 1 is favorably cooled. When the rotor runs at high speed, the radiating fins rotate along with the rotor, air pressure is formed on the outer surface of the rotor and the inner circle of the stator, air and cooling liquid are promoted to flow on the outer surface of the rotor and the end part of the stator winding, and the effect of reducing the temperature of the permanent magnet and the end part of the coil is achieved. The temperature of the outer surface of the rotor and the temperature of the inner part of the iron core can be reduced, and the problem of demagnetization of the permanent magnet is effectively solved; the temperature of the end part of the stator coil is reduced, and the heating of the stator is effectively reduced.

The application also discloses some embodiments, the radial height of the radiating fins on the rotor baffle 2 is h, wherein h is less than or equal to 10 mm; can effectual reinforcing radiating effect, when the rotor is rotatory, drive the fin rotation, arouse axial and radial atmospheric pressure difference, the air current can dispel the heat to rotor core 1 and stator, can cause the coolant liquid to flow at rotor surface and stator solenoid acceleration moreover, reduces rotor and stator temperature by a wide margin.

The application also discloses some embodiments, the number of the radiating fins is 24, and the 24 radiating fins are uniformly arranged around the circumference of the rotor baffle 2. The number and size of the radiating fins can be determined according to actual conditions and motor power. And 24 radiating fins are arranged outside the rotor baffle 2, the height and the size of each radiating fin are kept consistent, and the vertical height h is not more than 10 mm. 24 are to set up a fin for every 15, the more the quantity, the better the radiating effect, but if the quantity exceeds 24, will result in the coolant flow to reduce, the radiating effect is reduced, still increase the cost. Therefore, 24 radiating fins are designed in the application, so that the radiating effect is good, and the cost is low. When the rotor runs at a high speed, the rotor drives the radiating fins to rotate, air pressure is generated at two ends of the radiating fins, and system cooling liquid (refrigerants and the like) and air are driven to flow at an accelerated speed, so that cooling of the rotor and the stator is increased, and a good cooling effect is achieved.

The application also discloses some embodiments, heat-conducting portion 3 sets up inside rotor core 1, and heat-conducting portion 3 extends to on rotor baffle 2. When the motor operates, the heat conducting part 3 brings heat to the baffle plate from the inside of the rotor core 1, and the heat is radiated through the radiating fins.

The present application also discloses embodiments in which the number of the heat conduction portions 3 is set to at least two, and the at least two heat conduction portions 3 are arranged in order around the circumference of the rotor core 1.

The present application also discloses embodiments in which the number of the heat conduction portions 3 is set to 36, and the 36 heat conduction portions 3 are uniformly arranged around the circumference of the rotor core 1. The rotor baffle 2 is annular in structure and has the main functions of magnetic isolation and mechanical fixation. 36 conductor slots are arranged on one circumference, and are arranged one by one at every 10 degrees. The quantity of heat conduction portion 3 sets up to 36, means that there is one per 10, and the heat conduction part is more on the rotor, and the radiating effect is just better, but the calorific capacity of rotor is certain, and too much can lead to the machine to add cost to rise, and rotor radiating effect can not further improve yet, sets up 36 in this application, and not only the heat conduction is effectual, and low cost.

Referring to fig. 3 in combination, the present application also discloses some embodiments, the heat conducting portion 3 includes a heat conducting groove 31 and a heat conductor 32, the heat conducting groove 31 includes a guide hole and a guide groove, the guide hole is disposed inside the rotor core 1 and axially penetrates through the rotor core 1, the guide groove is disposed on the rotor baffle 2, a notch of the guide groove is communicated with the guide hole, and the heat conductor 32 is disposed in the heat conducting groove 31. Can take corresponding heat away with the conductor in the groove, at rotor core 1 department, the conductor groove is seted up at the circumference correspondingly, puts into heat pipe, better conductor, and when the rotor was high-speed moving like this, good conductor will carry out the heat and spread, finally gives off the heat in rotor baffle 2 departments, reduces 1 inside temperature of rotor core by a wide margin, effectively prevents the permanent magnet demagnetization.

The present application also discloses embodiments in which the thermal conductor 32 is a good conductor of heat.

The present application also discloses embodiments in which the thermal conductor 32 is a heat pipe or copper cylinder.

According to an embodiment of the present application, there is provided an electric machine including a rotor assembly as described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (10)

1. A rotor assembly, comprising:

a rotor core (1);

the rotor baffle (2), the said rotor baffle (2) is set up in the end of the said rotor core (1), there are heat-dissipating parts (21) on the said rotor baffle (2);

and a heat conduction portion (3), wherein the heat conduction portion (3) is used for guiding heat on the rotor iron core (1) to be transferred to the heat dissipation portion (21).

2. The rotor assembly according to claim 1, wherein the heat radiating portion (21) comprises a heat radiating fin provided at an outer circumferential portion of the rotor guard (2) to form a fan blade.

3. The rotor assembly according to claim 2, wherein the radial height of the fins on the rotor baffle (2) is h, wherein h ≦ 10 mm;

and/or the number of the radiating fins is 24, and the 24 radiating fins are uniformly arranged around the circumference of the rotor baffle (2).

4. The rotor assembly according to claim 1, wherein the heat conducting portion (3) is arranged inside the rotor core (1) and the heat conducting portion (3) extends to the rotor baffle (2).

5. The rotor assembly according to claim 1, wherein the number of the heat conducting portions (3) is provided in at least two, and the at least two heat conducting portions (3) are sequentially arranged around the circumference of the rotor core (1).

6. The rotor assembly according to claim 1, wherein the number of the heat conduction portions (3) is set to 36, and the 36 heat conduction portions (3) are uniformly arranged around the circumference of the rotor core (1).

7. The rotor assembly according to claim 1, wherein the heat conducting portion (3) comprises a heat conducting groove (31) and a heat conductor (32), the heat conducting groove (31) comprises a guide hole provided inside the rotor core (1) and penetrating the rotor core (1) in the axial direction and a guide groove provided on the rotor baffle (2), a notch of the guide groove communicating with the guide hole, and the heat conductor (32) is provided inside the heat conducting groove (31).

8. The rotor assembly of claim 7, wherein the thermal conductor (32) is a good conductor of heat.

9. The rotor assembly of claim 7, wherein the thermal conductor (32) is a heat pipe or a copper post.

10. An electrical machine comprising a rotor assembly, wherein the rotor assembly is as claimed in any one of claims 1 to 9.

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