阅读说明：本技术 一种高速电机 (High-speed motor ) 是由 董强亮 邓万通 李想 于 2020-11-27 设计创作，主要内容包括：本公开提供了一种高速电机,包括机座、定子组件和转子组件；定子组件与机座固定连接,转子组件与机座转动连接；转子组件包括转轴、转子绕组和多个转子冲片,多个转子冲片设置在转轴上,转子绕组设置在多个转子冲片上；转子冲片具有多个齿部,其中,至少一个齿部设置有外形光滑的通孔。该高速电机有利于提高转子组件在运行过程中的散热效果、减轻转子重量和提高电机的能量转化效率。(The present disclosure provides a high speed motor, comprising a base, a stator assembly and a rotor assembly; the stator assembly is fixedly connected with the base, and the rotor assembly is rotationally connected with the base; the rotor assembly comprises a rotating shaft, a rotor winding and a plurality of rotor punching sheets, the plurality of rotor punching sheets are arranged on the rotating shaft, and the rotor winding is arranged on the plurality of rotor punching sheets; the rotor punching sheet is provided with a plurality of tooth parts, wherein at least one tooth part is provided with a through hole with a smooth appearance. The high-speed motor is beneficial to improving the heat dissipation effect of the rotor assembly in the running process, reducing the weight of the rotor and improving the energy conversion efficiency of the motor.)

1. A high-speed motor is characterized by comprising a base, a stator assembly and a rotor assembly; the stator assembly is fixedly connected with the base, and the rotor assembly is rotatably connected with the base;

the rotor assembly comprises a rotating shaft, a rotor winding and a plurality of rotor punching sheets, the rotor punching sheets are arranged on the rotating shaft, and the rotor winding is arranged on the rotor punching sheets;

the rotor punching sheet is provided with a plurality of tooth parts, wherein at least one tooth part is provided with a through hole with a smooth appearance.

2. A high speed electric machine according to claim 1, wherein the through-hole is oval.

3. The high-speed electric machine according to claim 1, wherein each of the plurality of teeth portions is provided with the through hole.

4. The high-speed electric machine according to claim 1, wherein the top end of at least one of the teeth is provided with an arcuate notch.

5. The high-speed electric machine according to claim 4, wherein each of the plurality of teeth is provided with the arcuate notch.

6. The high speed electric machine of claim 1, wherein the rotor windings are a cage material.

7. The high speed electric machine of claim 6, wherein the rotor windings are a cast aluminum material.

8. The high-speed motor according to any one of claims 1-7, wherein the outer diameter of the rotor sheet is less than 150 mm.

9. The high-speed motor according to any one of claims 1 to 7, wherein a shaft hole is formed in the rotor punching sheet, and the diameter of the shaft hole is smaller than 50 mm.

10. A high-speed electric machine according to any of claims 1-7, characterised in that the machine base is provided with drainage holes.

Technical Field

The disclosure relates to the technical field of motors, in particular to a high-speed motor.

Background

The high-speed motor has the characteristics of small volume, high power density, direct connection with a high-speed load, omission of a traditional mechanical speed increasing device, reduction of system noise, improvement of system transmission efficiency and the like, has wide application prospects in the fields of high-speed grinding machines, air circulation refrigeration systems, energy storage flywheels, fuel cells, natural gas conveying high-speed centrifugal compressors, distributed power generation systems serving as aircraft or carrier-based power supply equipment and the like, and is one of research hotspots in the international electrotechnical field at present.

The high-speed motor is mainly characterized by high rotor speed, high stator winding current and magnetic flux frequency in an iron core, and high power density and loss density. These characteristics determine that the high-speed motor has different specific key technologies and design methods from the normal-speed motor.

Disclosure of Invention

The present disclosure provides a high-speed motor for solving the problem of unsatisfactory heat dissipation of the existing high-speed motor.

The present disclosure provides a high speed motor, comprising a base, a stator assembly and a rotor assembly; the stator assembly is fixedly connected with the base, and the rotor assembly is rotatably connected with the base;

the rotor assembly comprises a rotating shaft, a rotor winding and a plurality of rotor punching sheets, the rotor punching sheets are arranged on the rotating shaft, and the rotor winding is arranged on the rotor punching sheets;

the rotor punching sheet is provided with a plurality of tooth parts, wherein at least one tooth part is provided with a through hole with a smooth appearance.

In some alternative embodiments, the through-hole is oval.

In some alternative embodiments, the plurality of teeth are each provided with the through hole.

In some alternative embodiments, the tip of at least one of the teeth is provided with an arcuate notch.

In some alternative embodiments, the plurality of teeth are each provided with the arcuate notch.

In some alternative embodiments, the rotor winding is a cage material.

In some alternative embodiments, the rotor windings are cast aluminum material.

In some optional embodiments, the outer diameter of the rotor sheet is less than 150 mm.

In some optional embodiments, the rotor punching sheet is provided with a shaft hole, and the diameter of the shaft hole is less than 50 mm.

In some alternative embodiments, the housing is provided with drain holes.

The high-speed motor provided by the disclosure is provided with the through hole with smooth appearance at the tooth part of the rotor punching sheet, and at least can realize the following technical effects:

firstly, the heat dissipation effect of the rotor assembly in the operation process is improved;

secondly, the weight of the rotor is reduced, and the energy conversion efficiency of the motor is improved;

thirdly, the smooth appearance is favorable for avoiding the stress concentration at the through hole, and the service life of the motor is prolonged.

Drawings

Other features, objects and advantages of the disclosure will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view from one perspective of a high speed electric machine according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a stator assembly of a high speed electric machine according to an embodiment of the present disclosure;

fig. 3 is a schematic view of a stator lamination of a high speed electric machine according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a rotor assembly of a high speed electric machine according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a rotor lamination of a high speed electric machine according to an embodiment of the present disclosure;

fig. 6 is a tooth schematic diagram of a rotor sheet of a high-speed electric machine according to an embodiment of the present disclosure.

Description of the symbols: 1-a rotor assembly; 2-common flat bond; 3-a wave spring; 4-a first bearing; 5-bolt; 6-flange end cap; 7-a machine base; 8-inner hexagonal set screw; 9-a stator assembly; 10-a retainer ring for a bore; 11-a second bearing; 12-rear end cap; 13-framework oil seal; 14-a junction box; 15-a lifting ring; 16-round outlet valve; 17-stator punching; 18-a cramp; 19-a stator coil; 20-a rotating shaft; 21-rotor punching; 210-a shaft hole; 211-punching sheet body; 212-tooth; 212 a-a via; 212 b-a notch; 22-rotor winding.

Detailed Description

The present disclosure is described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

Fig. 1 is a schematic view from one perspective of a high speed electric machine according to an embodiment of the present disclosure. As shown in fig. 1, the high speed electric machine in the present embodiment includes a housing 7, a stator assembly 9, and a rotor assembly 1. Wherein, stator module 9 and frame 7 fixed connection, rotor subassembly 1 and frame 7 are rotated and are connected.

In this embodiment, the assembled stator assembly 9 may be press-fitted into the inner bore of the housing 7, and the stator assembly 9 may be secured within the housing 7 by the socket set screws 8. The terminal block 15 is screw-fitted to the housing 7. The rotor assembly 1 is inserted into the press-fitted housing 7. The wave spring 3 is fitted into the bearing chamber of the flange end cap 6, the first bearing 4 is fitted into the bearing chamber of the flange end cap and then fitted to the rotor assembly and the housing. The second bearing 11 is installed in the bearing chamber of the rear end cover 12, the second bearing 11 is fixed in the rear end cover 12 by the retainer ring 10 for holes, and then is installed between the rotor assembly 1 and the base 7, and the flange end cover 6 and the rear end cover 12 are fixed on the base 7 by 3 bolts 5 at two ends respectively. The frame oil seals 13 are respectively installed to both sides of the motor. A circular outlet valve 16 is fitted to the side of the flanged end cap 6.

In the present embodiment, the rotor assembly 1 includes a rotating shaft 20, a rotor winding 22, and a plurality of rotor sheets 21. The plurality of rotor sheets 21 are disposed on the rotating shaft 20, and the rotor winding 22 is disposed on the plurality of rotor sheets 21.

Fig. 4 is a schematic view of a rotor assembly of a high speed electric machine according to an embodiment of the present disclosure. As shown in fig. 4, an appropriate amount of aluminum may be cast from an appropriate amount of rotor punching sheets 21 to form a rotor, and then the cast rotor is mounted inside the rotating shaft 20, thereby forming the rotor assembly 1.

Fig. 5 is a schematic view of a rotor sheet of a high speed electric machine according to an embodiment of the present disclosure. As shown in fig. 5, the rotor sheet 21 has a plurality of teeth 212. Wherein at least one tooth 212 is provided with a through hole having a smooth outer shape. Such as via 212a shown in fig. 6.

In this embodiment, the shape of the through-hole may be defined by a closed curve that is smooth everywhere. By making the shape of the through-hole smooth, stress concentration caused by sharp points in the shape of the through-hole can be avoided.

In one example, as shown in FIG. 6, the through-hole 212a is oval. In other examples, the through-hole may be oval or other smooth profile.

In one example, each tooth 212 of the rotor sheet 21 is provided with a through hole. In another example, some of the teeth 212 on the rotor sheet 21 are provided with teeth, and the teeth provided with through holes and the teeth not provided with through holes are arranged in a staggered manner.

Fig. 2 is a schematic view of a stator assembly of a high speed electric machine according to an embodiment of the present disclosure. As shown in fig. 2, the stator assembly 9 is composed of a stator punching sheet 17, a cramp 18, a stator coil 19, and the like. The specific groove shape of the stator punching sheet (17) can refer to the attached figure 3.

In this embodiment, an appropriate amount of stator coils 19 may be added to each of two sides of an appropriate amount of stator laminations 17, when the length meets the design requirement of a stator core, a stator buckle lamination laminating machine is used to fasten the buckle 18, and then the stator coils 19 and the insulation protection are installed in the stator core to form the stator assembly.

In this embodiment, stator module 9 forms rotating magnetic field through three-phase symmetrical current, and rotating magnetic field cuts rotor module 1 induction electromotive force and electric current, and rotor module 1 receives the electromagnetic force effect under the magnetic field power effect, forms electromagnetic torque, and driving motor is rotatory, converts the electric energy into mechanical energy.

The high-speed motor provided by the disclosure is provided with the through hole with smooth appearance at the tooth part of the rotor punching sheet, and at least can realize the following technical effects: firstly, the heat dissipation effect of the rotor assembly in the operation process is improved; secondly, the weight of the rotor is reduced, and the energy conversion efficiency of the motor is improved; thirdly, the smooth appearance is favorable for avoiding the stress concentration at the through hole, and the service life of the motor is prolonged.

In one example, the tip of at least one tooth is also provided with an arcuate notch. As shown in fig. 6, the top end of the tooth portion 212 (i.e., the end away from the center of the punch body) is provided with an arcuate notch 212 b. So, be favorable to further improving the radiating effect of rotor subassembly and alleviate structure weight. In addition, because the inside of the arch notch is a smooth curve, the occurrence of stress concentration is favorably reduced,

in one example, each tooth on the rotor sheet is provided with an arcuate notch. When a plurality of rotor punching sheets are assembled, the notch parts of the rotor punching sheets are respectively aligned, so that an arc-shaped groove can be integrally formed. Therefore, the effects of heat dissipation and weight reduction can be realized to a greater extent.

In one example, the rotor windings are cage material. For example, the rotor windings may be formed by casting metal.

In one example, the rotor windings are cast aluminum material. For example, an appropriate amount of aluminum may be cast into an appropriate amount of the rotor sheet 21 to form the rotor. Therefore, the resistance of the winding can be reduced, and the energy conversion efficiency can be improved.

In the embodiment, the outer diameter of the rotor punching sheet is less than 150 mm. In one example, the outer diameter of the rotor sheet may be 145 mm. Here, the outer diameter of the rotor refers to the maximum diameter of the rotor, for example, the length of a line segment passing through the center of a rotor sheet and having both ends located at the top of a tooth.

In this embodiment, the rotor sheet is provided with a shaft hole, and the diameter of the shaft hole is smaller than 50 mm. As shown in fig. 5, the rotor sheet 21 is provided with a shaft hole 210. In one example, the diameter of the axial bore 210 may be 48 mm. Here, the diameter of the shaft hole refers to the diameter of a circle corresponding to the shaft hole.

In this embodiment, the housing is provided with a drain hole (not shown in fig. 1). For example, 4 drain holes which are uniformly distributed can be designed on a base of the motor, so that the condition that the rest drain holes can work after the independent drain holes are blocked due to severe outdoor environment is ensured, and the reliability and the long service life of the motor are ensured.

In some alternative embodiments, the terminal box 14 may be encapsulated with potting compound to enhance the protective capabilities of the terminal box and the motor as a whole.

In some alternative embodiments, the high speed motor has an output power of 40kW, a rated voltage of 380V, and a rated frequency of 400 Hz. In addition, the pole number of the high-speed motor is 4, the design value of the efficiency is 93%, the design value of the power factor is 0.85, the calculation type is a steady state mode, and the electromagnetic wire is a modified polyester enameled round copper wire.

In some optional embodiments, DW470 silicon steel sheets are adopted for both the rotor punching sheet and the stator punching sheet.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept as defined above. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.