CN209963897U - Dynamic balance plate structure of cooling rotor in motor - Google Patents
Dynamic balance plate structure of cooling rotor in motor Download PDFInfo
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- CN209963897U CN209963897U CN201920206270.6U CN201920206270U CN209963897U CN 209963897 U CN209963897 U CN 209963897U CN 201920206270 U CN201920206270 U CN 201920206270U CN 209963897 U CN209963897 U CN 209963897U
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Abstract
The utility model aims to disclose a dynamic balance plate structure of a cooling rotor in a motor, which comprises a dynamic balance plate body, wherein the outer end surface of the dynamic balance plate body is provided with a plurality of ribs and a central ring groove which are formed by high-pressure die casting, the inner end surface of the dynamic balance plate body is provided with a positioning convex key matched with a mounting hole of a motor rotor iron core, a central hub part is arranged in the middle of the dynamic balance plate body, the central hub part is connected with the outer peripheral edge of the dynamic balance plate body through the ribs, and an air guide groove is arranged between the ribs; compared with the prior art, simple structure, radiating effect are good, convenient assembling, low cost, and production efficiency is high, the better assurance the motor at high temperature environment, motor reliable operation under the high-speed rotation realizes the utility model aims at.
Description
Technical Field
The utility model relates to a rotor dynamic balance plate structure, in particular to cooling rotor dynamic balance plate structure in motor.
Background
With the continuous progress of science and technology, new energy automobile motors are developing towards the direction of high rotating speed and high power density, the problem of temperature rise of the motors is more and more prominent, the mainstream technical route of the new energy automobile motors at the present stage is a permanent magnet synchronous motor, magnetic steel of the permanent magnet synchronous motor is very sensitive to working temperature, and when the temperature of the magnetic steel is too high, the magnetic performance of the magnetic steel can be sharply reduced, even permanent magnetic loss can be caused, and the performance and the reliability of the motors are seriously influenced.
At present, the fixed mainly has two kinds of modes, first mode, permanent magnet synchronous machine's dynamic balance board: the dynamic balance inner hole is provided with a convex key which is clamped in the key groove of the rotating shaft, so that the rotor is prevented from rotating relatively between the dynamic balance plate and the rotating shaft at a high speed or in the positive and negative rotating process. The second mode is as follows: a circle of uniformly distributed round holes are formed in the middle of the dynamic balance plate, the dynamic balance plates at two ends and the rotor core are oppositely pulled by rivets or screws, and the dynamic balance plate and the rotating shaft are prevented from rotating relatively.
Under the working conditions of high power and high speed rotation, the temperature rise of the motor is fast, the performance of the motor is influenced, and even the permanent demagnetization risk of the magnetic steel is generated. The rotor dynamic balance plate has large centrifugal force when the rotor rotates at high speed, relative rotation is easily generated between the dynamic balance plate and the rotating shaft, the dynamic balance mass of the motor rotor is deteriorated, vibration is generated, vibration noise is generated, and bearing abrasion is accelerated.
Therefore, a dynamic balance plate structure of a cooling rotor in a motor is particularly needed to solve the existing problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dynamic balance plate structure of cooling rotor in motor, to prior art's not enough, effectively solve among the prior art problem that cavity local temperature is too high and initiative heat dissipation difficulty in the motor, simplified assembly and processing technology, it is complicated to have solved dynamic balance plate processing technology or assembly technology, and production efficiency is low, technical problem that manufacturing cost is high.
The utility model provides a technical problem can adopt following technical scheme to realize:
the dynamic balance plate structure of the cooling rotor in the motor is characterized by comprising a dynamic balance plate body, wherein a plurality of ribs and a central ring groove which are formed through high-pressure die casting are arranged on the outer end face of the dynamic balance plate body, a positioning convex key matched with a mounting hole of a motor rotor iron core is arranged on the inner end face of the dynamic balance plate body, a central hub portion is arranged in the middle of the dynamic balance plate body, the central hub portion is connected with the outer edge of the dynamic balance plate body through the ribs, and air guide grooves are formed among the ribs.
In one embodiment of the present invention, the central hub is in transition fit with the motor shaft.
In an embodiment of the present invention, the dynamic balance plate body is fixedly connected to the mounting hole of the rotor core of the electric machine through the positioning convex key.
In an embodiment of the present invention, the ribs are uniformly distributed on the dynamic balance plate body at an angle of 60 °.
In one embodiment of the present invention, the width of the air guiding groove is 10 mm.
The utility model discloses a dynamic balance plate structure of cooling rotor in motor, compared with the prior art, simple structure, radiating effect are good, convenient assembling, low cost, and production efficiency is high, the better assurance the motor at high temperature environment, motor reliable operation under the high-speed rotation realizes the utility model aims at.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
Fig. 1 is a schematic structural view of an inner end face of a dynamic balance plate of a cooling rotor in a motor according to the present invention;
fig. 2 is a schematic structural view of the outer end face of the dynamic balance plate of the cooling rotor in the motor of the present invention;
fig. 3 is a schematic cross-sectional structural view of the dynamic balance plate of the cooling rotor in the motor according to the present invention;
fig. 4 is a schematic structural diagram of the assembly of the dynamic rotor balancing plate and the rotor of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Examples
As shown in fig. 1 to 4, the dynamic balance plate structure of cooling rotor in motor of the present invention includes a dynamic balance plate body 10, the outer end face of the dynamic balance plate body 10 is provided with a plurality of ribs 11 and a central ring groove 12, the inner end face of the dynamic balance plate body 10 is provided with a positioning convex key 13, the middle of the dynamic balance plate body 10 is provided with a central boss 14, the central boss 14 is connected with the peripheral edge of the dynamic balance plate body 10 through the ribs 11, and an air guiding groove 15 is provided between the ribs 11.
In this embodiment, the rib 11 and the central annular groove 12 on the outer end surface of the dynamic balance plate body 10 are formed by high-pressure die casting, the rib 11 plays a role in disturbing air in the motor cavity in the rotation process of the rotor, the central annular groove 12 plays a role in controlling the air flow direction and flow rate, it is ensured that the heat generated in the motor cavity is small, the air at the lower part of the temperature is blown to the part with high heat generation and high temperature, so that the temperature in the motor cavity is balanced, and the part with high temperature is fully cooled.
In this embodiment, the transition fit between the hub portion 14 and the shaft 20 facilitates the installation therebetween.
In the present embodiment, the ribs 11 are uniformly distributed on the dynamic balance plate body 10 at an angle of 60 °; the width of the air guide groove 15 is 10 mm.
Two positioning convex keys 13 on the inner end surface of the dynamic balance plate body 10 are matched with the weight removing holes on the rotor iron core 30, so that the dynamic balance plate can be prevented from rotating relative to the rotating shaft 20 under the condition of high-speed rotation, the dynamic balance quality of the rotor is ensured not to change, and the weight removing method is adopted for correcting the dynamic balance of the rotor, and the weight is removed on the dynamic balance ribs at two ends.
The utility model discloses a dynamic balance plate structure of cooling rotor in motor has solved the too high local temperature of cavity in the motor effectively, the difficult problem of initiative heat dissipation. The two positioning convex keys 13 are additionally arranged on the inner side surface, so that the assembly and processing technology is simplified, and the technical problems of complex processing technology or assembly technology, low production efficiency and high production cost of the dynamic balance plate are solved.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (5)
1. The dynamic balance plate structure of the cooling rotor in the motor is characterized by comprising a dynamic balance plate body, wherein a plurality of ribs and a central ring groove which are formed through high-pressure die casting are arranged on the outer end face of the dynamic balance plate body, a positioning convex key matched with a mounting hole of a motor rotor iron core is arranged on the inner end face of the dynamic balance plate body, a central hub portion is arranged in the middle of the dynamic balance plate body, the central hub portion is connected with the outer edge of the dynamic balance plate body through the ribs, and air guide grooves are formed among the ribs.
2. The internal cooling rotor dynamic balance plate structure of an electric motor of claim 1, wherein the central hub portion is in transition fit with a rotating shaft of the electric motor.
3. The dynamic balance plate structure for the cooling rotor in the motor according to claim 1, wherein the dynamic balance plate body is fixedly connected with the mounting hole of the motor rotor core through a positioning convex key.
4. The inter-motor cooling rotor dynamic balance plate structure of claim 1, wherein the ribs are uniformly distributed on the dynamic balance plate body at an angle of 60 °.
5. The dynamic balance plate structure for the cooling rotor in the motor according to claim 1, wherein the width of the air guiding groove is 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920206270.6U CN209963897U (en) | 2019-02-18 | 2019-02-18 | Dynamic balance plate structure of cooling rotor in motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920206270.6U CN209963897U (en) | 2019-02-18 | 2019-02-18 | Dynamic balance plate structure of cooling rotor in motor |
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| Publication Number | Publication Date |
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| CN209963897U true CN209963897U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920206270.6U Active CN209963897U (en) | 2019-02-18 | 2019-02-18 | Dynamic balance plate structure of cooling rotor in motor |
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| CN (1) | CN209963897U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861446A (en) * | 2019-02-18 | 2019-06-07 | 浙江龙芯电驱动科技有限公司 | The cooling hardened structure of rotor dynamic balancing in a kind of motor |
-
2019
- 2019-02-18 CN CN201920206270.6U patent/CN209963897U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861446A (en) * | 2019-02-18 | 2019-06-07 | 浙江龙芯电驱动科技有限公司 | The cooling hardened structure of rotor dynamic balancing in a kind of motor |
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