CN219394515U

CN219394515U - Balance disc, rotor assembly and power motor

Info

Publication number: CN219394515U
Application number: CN202320214074.XU
Authority: CN
Inventors: 夏伟; 董大为; 赵帅; 赵瑞宽; 程麒; 张健春
Original assignee: Marvel Power Control Technology Shanghai Co ltd; Beijing Mawei Electric Power Technology Co ltd
Current assignee: Marvel Power Control Technology Shanghai Co ltd; Beijing Mawei Electric Power Technology Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-07-21
Anticipated expiration: 2033-02-06

Abstract

The utility model relates to a balance disc, a rotor assembly and a power motor, wherein the balance disc is arranged on a rotating shaft and comprises a disc body, the disc body is provided with an air guide part, the air guide part is arranged in a penetrating manner along the thickness direction of the disc body, and when the balance disc is in a rotating state, air in an external environment can pass through the air guide part to contact a rotor iron core and magnetic steel arranged on the rotating shaft. When the rotor assembly rotates at a high speed, air in the surrounding environment of the balance disc can be sucked into the air guide part and pass through the air guide part to be in contact with the rotor core and the magnetic steel, and heat exchange is carried out in the contact process so as to take away the heat of the rotor core and the magnetic steel, so that the effects of heat dissipation and temperature reduction of the rotor core and the magnetic steel are achieved. Therefore, even if the rotor assembly works for a long time to generate a large amount of heat, the rotor core and the magnetic steel can be prevented from being in an overhigh temperature state, the magnetic loss is reduced, the possible demagnetizing risk of the magnetic steel is eliminated, and the usability and the working efficiency of the power motor are ensured.

Description

Balance disc, rotor assembly and power motor

Technical Field

The utility model relates to the technical field of motors, in particular to a balance disc, a rotor assembly and a power motor.

Background

In recent years, with the rapid development of the new energy automobile industry, the usage amount of the power motor playing a role of a main power source is continuously improved, so that the performance quality of the power motor greatly influences the working reliability and the use experience of the new energy automobile.

When the power motor works, magneto-electric power rotation torque is generated through the rotor assembly and the stator assembly which rotate relatively, so that the rotating shaft of the power motor outputs rotation driving force. In the long-time working process, the temperature of the rotor core and the magnetic steel of the rotor assembly can rise sharply, the magnetic loss can be increased due to the fact that the high temperature is difficult to scatter, the magnetic steel is demagnetized, and the service performance and the working efficiency of the power motor are greatly affected.

Disclosure of Invention

Based on this, it is necessary to provide a balance disc, a rotor assembly and a power motor, and the problem that the service performance and the working efficiency of the power motor are affected due to the magnetic loss is large and the magnetic steel demagnetizing risk exists in the prior art is solved.

In one aspect, the application provides a balance disc for install in the pivot, the balance disc includes the dish body, the dish body is equipped with wind-guiding portion, wind-guiding portion is followed the thickness direction of dish body runs through the setting, works as the balance disc is in the rotation state, air in the external environment can pass wind-guiding portion in order to contact install in pivot epaxial rotor core and magnet steel.

The balancing disk of the scheme is applied to the rotor assembly, and after the rotor iron core and the magnetic steel are mounted on the rotating shaft, the balancing disk is mounted on the rotating shaft and clings to the side face, located in the axial direction, of the rotor iron core. Because be equipped with wind-guiding portion on the dish body of balance disc, and wind-guiding portion runs through the setting along the thickness direction of dish body, when rotor subassembly high-speed rotation, the air that is arranged in the surrounding environment of balance disc can be inhaled wind-guiding portion and pass behind the wind-guiding portion with rotor core and magnet steel contact, carries out the heat exchange in the contact process to take away rotor core and magnet steel's heat, reach the effect to rotor core and magnet steel heat dissipation cooling. Therefore, even if the rotor assembly works for a long time to generate a large amount of heat, the rotor core and the magnetic steel can be prevented from being in an overhigh temperature state, the magnetic loss is reduced, the possible demagnetizing risk of the magnetic steel is eliminated, and the usability and the working efficiency of the power motor are ensured.

The technical scheme of the application is further described below:

in one embodiment, the air guiding part is provided as an air guiding hole.

In one embodiment, the number of the air guide holes is at least two, and the at least two air guide holes are arranged at intervals along the circumferential direction of the disc body.

In one embodiment, the air guiding hole comprises an air guiding groove and an air passing hole, wherein the air guiding groove is communicated with the air guiding groove, the air guiding groove is concavely formed in one side face of the disc body in the thickness direction, the air guiding groove is provided with a first groove end and a second groove end which are oppositely arranged, the second groove end is communicated with the air passing hole, and the air passing hole penetrates through the disc body in the thickness direction.

In one embodiment, the draft slot presents an increasing transition in slot depth from the first slot end to the second slot end.

In one embodiment, the middle part of the disc body is provided with an assembly hole penetrating through the thickness direction of the disc body, and the assembly hole is used for enabling the balance disc to be sleeved outside the rotating shaft.

In one embodiment, the balancing disk further comprises a fan blade, and the fan blade is disposed on an integral part or a partial part of the outer peripheral surface of the disk body.

In another aspect, the present application also provides a rotor assembly comprising:

a rotor core;

at least one piece of magnetic steel, at least one piece of magnetic steel is arranged on the rotor core; the method comprises the steps of,

two balancing discs as described above, one of which is located on one axial side of at least one of the rotor cores and the other of which is located on the other axial side of at least one of the rotor cores.

In one embodiment, a vent hole is formed in the rotor core, the vent hole penetrates through the rotor core along the axial direction of the rotor core, and two opposite hole ends of the vent hole are respectively communicated with the corresponding air guide parts.

In addition, the application also provides a power motor comprising the rotor assembly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a balance disc according to an embodiment of the present application;

FIG. 2 is an enlarged partial view of the air guide of FIG. 1;

FIG. 3 is a schematic view of a rotor assembly according to an embodiment of the present disclosure;

fig. 4 is an assembled structural view of a rotor assembly and stator end windings.

Reference numerals illustrate:

100. a rotor assembly; 10. a balancing disk; 11. a tray body; 111. a fitting hole; 12. an air guide part; 121. an induced draft slot; 121a, a first end; 121b, a second end; 122. a wind hole; 13. a fan blade; 20. a rotating shaft; 30. a rotor core and magnetic steel; 31. a vent hole; 200. stator end windings.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Embodiments of the present application provide a power motor that includes a housing, a shaft 20, a rotor assembly 100, and a stator assembly. The stator assembly is fixed on the inner wall of the shell, the rotating shaft 20 is installed by penetrating through the shell, and the rotor assembly 100 is installed on the rotating shaft 20. The magneto-electricity power rotation torque is generated between the stator assembly and the rotor assembly 100, so that the rotating shaft 20 can be driven to rotate, and the purpose of outputting power through the rotating shaft 20 is achieved.

As shown in fig. 1, a balance disc 10 for mounting on a rotating shaft 20, the balance disc 10 includes a disc body 11, the disc body 11 is provided with an air guide 12, the air guide 12 is provided to penetrate along a thickness direction of the disc body 11, and when the balance disc 10 is in a rotating state, air in an external environment can pass through the air guide 12 to contact a rotor core and a magnetic steel 30 mounted on the rotating shaft 20.

As shown in fig. 3, a rotor assembly 100 according to an embodiment of the present application includes a rotor core, at least one magnetic steel, and two balancing disks 10 as described above.

At least one magnetic steel is arranged on the rotor core; one of the balance disks 10 is located on one axial side of at least one rotor core, and the other balance disk 10 is located on the other axial side of at least one rotor core.

In summary, implementing the technical scheme of the embodiment has the following beneficial effects: the balancing disk 10 of the above-mentioned scheme is applied to the rotor assembly 100, and after the rotor core and the magnetic steel 30 are mounted on the rotating shaft 20, the balancing disk 10 is mounted on the rotating shaft 20 and is closely attached to the side surface of the rotor core in the axial direction. Because be equipped with wind-guiding portion 12 on the dish body 11 of balance dish 10, and wind-guiding portion 12 runs through the setting along the thickness direction of dish body 11, when rotor subassembly 100 high-speed rotation, the air that is arranged in the surrounding environment of balance dish 10 can be inhaled wind-guiding portion 12 and pass behind the wind-guiding portion 12 and contact with rotor core and magnet steel 30, carries out the heat exchange in the contact process to take away rotor core and magnet steel 30's heat, reaches the effect of cooling down that dispels the heat to rotor core and magnet steel 30. In this way, even if the rotor assembly 100 works for a long time to generate a large amount of heat, the rotor core and the magnetic steel 30 can be prevented from being in an overhigh temperature state, the magnetic loss is reduced, the possible demagnetizing risk of the magnetic steel is eliminated, and the usability and the working efficiency of the power motor are ensured.

It can be understood that the driving motor has two working states of forward rotation and reverse rotation, and a balance disc 10 is respectively installed on two axial sides of at least one rotor core, so that the purposes of leading air in the surrounding environment into the air guide part 12 and achieving the heat dissipation and cooling effects on the rotor core and the magnetic steel 30 during forward rotation and reverse rotation are satisfied.

In still other embodiments, the inside of the rotor core is provided with the ventilation holes 31, the ventilation holes 31 are provided penetrating along the axial direction of the rotor core, and opposite hole ends of the ventilation holes 31 are respectively communicated with the corresponding air guide portions 12. Firstly, the ventilation holes 31 are arranged to help the rotor core to lighten the weight and improve the dynamic balance stability during rotation; secondly, the air flowing in from the air guiding part 12 can further flow into the ventilation holes 31, so that the contact area between the air and the rotor core can be increased, the heat exchange efficiency is further improved, the heat conduction is completed more quickly, and the heat dissipation effect on the rotor core and the magnetic steel 30 is accelerated.

Preferably, the ventilation hole 31 adopts a 'water drop' structural design, so that a larger contact heat exchange area between the air and the rotor core can be obtained, and meanwhile, the air can flow in the ventilation hole 31 more easily, so that heat can be timely carried away and discharged.

In some embodiments, the air guide 12 is provided as an air guide hole. The air guide hole meets the basic requirement that air in the external environment flows through and contacts the rotor core, and meanwhile, the processing and the forming are convenient.

Further, at least two air guide holes are provided, and the at least two air guide holes are arranged at intervals along the circumferential direction of the tray body 11. Therefore, at least two air guide holes in unit time can guide air in the external environment to the rotor core at the same time, so that more air participates in heat conduction at the same time, thereby achieving the effects of faster heat dissipation to the rotor core and the magnetic steel 30 and strengthening heat dissipation.

With continued reference to fig. 2, in some embodiments, the air guiding hole includes an air guiding slot 121 and an air passing hole 122, which are connected to each other, the air guiding slot 121 is concavely formed on one side surface of the disc body 11 in the thickness direction, the air guiding slot 121 has a first slot end and a second slot end which are oppositely disposed, the second slot end is connected to the air passing hole 122, and the air passing hole 122 is disposed through the disc body 11 in the thickness direction. The air guiding groove 121 has guiding function on air, so that air can flow into the air passing hole 122 through the diameter of the air guiding groove 121 more easily, and finally passes through the air passing hole 122 to contact the rotor core, and the effect of faster heat dissipation and temperature reduction is achieved.

Further, the groove depth of the induced draft groove 121 presents an increasing transition from the first groove end to the second groove end. The depth of the groove depth is increased gradually, so that better drainage effect can be formed on air.

In still other embodiments, the middle portion of the disk body 11 is provided with a fitting hole 111 penetrating through the thickness direction thereof, and the fitting hole 111 is used to fit the balance disk 10 outside the rotating shaft 20. The balance disc 10 is conveniently assembled with the rotating shaft 20.

With continued reference to fig. 1 and 4, in addition, the balancing disk 10 further includes fan blades 13, where the fan blades 13 are disposed on an entire or partial outer peripheral surface of the disk body 11. For example, in the present embodiment, the blades 13 are fully arranged on the entire outer circumferential surface of the disc body 11, and when the balance disc 10 rotates along with the rotating shaft 20, the blades 13 agitate air to blow air to the stator end winding 200, thereby cooling the stator end winding 200.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. The utility model provides a balance disc for install in the pivot, its characterized in that, the balance disc includes the dish body, the dish body is equipped with wind-guiding portion, wind-guiding portion is followed the thickness direction of dish body runs through the setting, works as when the balance disc is in the rotation state, air in the external environment can pass wind-guiding portion in order to contact install in pivot epaxial rotor core and magnet steel.

2. The balance of claim 1, wherein the air guide is configured as an air guide hole.

3. The balance disc according to claim 2, wherein at least two air guide holes are provided, and at least two air guide holes are arranged at intervals along the circumferential direction of the disc body.

4. The balance disc according to claim 2 or 3, wherein the air guide hole comprises an air guide groove and an air passing hole which are communicated, the air guide groove is concavely formed on one side face of the disc body in the thickness direction, the air guide groove is provided with a first groove end and a second groove end which are oppositely arranged, the second groove end is communicated with the air passing hole, and the air passing hole penetrates through the disc body in the thickness direction.

5. The balance of claim 4 wherein the draft slot presents a transition in slot depth from the first slot end to the second slot end.

6. The balance disc according to claim 1, wherein the middle part of the disc body is provided with an assembly hole penetrating through the thickness direction thereof, and the assembly hole is used for sleeving the balance disc on the outside of the rotating shaft.

7. The balance disc of claim 1, further comprising fan blades disposed on an entire or partial portion of an outer peripheral surface of the disc body.

8. A rotor assembly, comprising:

a rotor core;

two balancing discs according to any one of claims 1 to 7, wherein one balancing disc is located on one axial side of at least one of the rotor cores and the other balancing disc is located on the other axial side of at least one of the rotor cores.

9. The rotor assembly of claim 8, wherein a vent hole is provided in the rotor core, the vent hole is provided through along an axial direction of the rotor core, and opposite hole ends of the vent hole are respectively communicated with the corresponding air guide portions.

10. A power motor comprising a rotor assembly as claimed in claim 8 or 9.