一种电机转子组件、电机和压缩机

Abstract

本实用新型提供一种电机转子组件、电机和压缩机，电机转子组件包括：转子铁芯、配重块、主平衡块和副平衡块，所述主平衡块设置于所述转子铁芯的轴向一端，所述副平衡块设置于所述转子铁芯的轴向另一端，所述配重块设置在所述转子铁芯的轴向一端并与所述主平衡块连接为一体结构，和 / 或所述配重块设置在所述转子铁芯的轴向另一端并与所述副平衡块连接为一体结构，所述转子铁芯的极对数为P，并且2P≥10。根据本实用新型能够增大转子组件的转动惯量，能够提升设备运行时的稳定性，减少振动，进而提高整个系统的效率和使用寿命；有效解决现有技术中的电机的转动惯量较低，导致在运行过程中出现不稳定功率增加的问题。

Claims

1. A motor rotor assembly, characterized in that: include: The rotor core (11), counterweight (14), main balance block (15), and auxiliary balance block (16) are provided. The main balance block (15) is located at one axial end of the rotor core (11), and the auxiliary balance block (16) is located at the other axial end of the rotor core (11). The counterweight (14) is located at one axial end of the rotor core (11) and is connected to the main balance block (15) as an integral structure, and / or the counterweight (14) is located at the other axial end of the rotor core (11) and is connected to the auxiliary balance block (16) as an integral structure. The rotor core (11) has P pole pairs, and 2P ≥ 10.

2. The motor rotor assembly according to claim 1, characterized in that: The counterweight (14) is a ring structure and is fixedly disposed on the end face of one axial end of the rotor core (11). The main balance block (15) is fixedly disposed on the axial end face of the counterweight (14) away from the rotor core (11). The secondary balance block (16) is disposed on the end face of the other axial end of the rotor core (11).

3. The motor rotor assembly according to claim 2, characterized in that: The main balance block (15) has an arc-shaped segment structure, and it is only opposite to a part of the arc segment of the counterweight block (14) in the circumferential direction. The auxiliary balance block (16) also has an arc-shaped segment structure, and it is only opposite to a part of the arc segment of the rotor core (11) in the circumferential direction. There are no opposing segments between the main balance block (15) and the auxiliary balance block (16) along the axial direction of the rotor core (11). A rotor baffle (13) is also provided between the auxiliary balance block (16) and the rotor core (11).

4. The motor rotor assembly according to claim 2, characterized in that: Within the projection plane of the axial end face of the counterweight (14), the outer peripheral surface of the counterweight (14) includes a first arc segment (141) and a second arc segment (142). Both the first arc segment (141) and the second arc segment (142) are multiple segments, and the first arc segment (141) and the second arc segment (142) are alternately connected along the circumferential direction of the counterweight (14) to form the outer peripheral surface of the counterweight (14). The center of the first arc segment (141) coincides with the center of the counterweight (14) and coincides with the central axis of the rotor core (11). The center of the second arc segment (142) is axially opposite to the radially outer side of the rotor core (11).

5. The motor rotor assembly according to claim 4, characterized in that: In the projection plane of the axial end face of the rotor core (11), one of the first arc segments (141) is located on the d-axis of the rotor core (11) and is symmetrical with respect to the d-axis, and a plurality of the first arc segments (141) are symmetrical with respect to the d-axis; one of the second arc segments (142) is located on the q-axis of the rotor core (11) and is symmetrical with respect to the q-axis, and a plurality of the second arc segments (142) are symmetrical with respect to the q-axis; The angle formed by the lines connecting the two ends of the first arc segment (141) with the center of the rotor core (11) is a2, and the angle formed by the lines connecting the two ends of the second arc segment (142) with the center of the rotor core (11) is a1. Furthermore, a1 < a2, 2° ≤ a1 ≤ 12°, and a1 + a2 = 360° / (2P), where P is the number of pole pairs of the rotor core.

6. The motor rotor assembly according to claim 4, characterized in that: The outer diameter of the rotor core (11) is D1. In the projection plane of the axial end face of the rotor core (11), multiple circumcircles of the second arc segment (142) are made with the center of the rotor core (11) as the center. The diameter of the circumcircle is D2, and 0 < D1 - D2 < 1 mm.

7. The motor rotor assembly according to claim 2, characterized in that: The rotor core (11) has a waist-shaped flow hole (18). Along the radial direction of the rotor core (11), the flow hole (18) includes an arc segment one located on the outer side and an arc segment two located on the inner side. Both the arc segment one and the arc segment two are centered on the center of the rotor core (11). The distance between the arc segment one and the center of the rotor core (11) is the outer diameter of the flow hole (18), which is R1. The counterweight (14) includes an annular hole located on its inner circumference. The diameter of the annular hole is R2, and R2 > R1.

8. The motor rotor assembly according to claim 2, characterized in that: Along the axial direction of the rotor core (11), the axial height of the rotor core (11) is H, the thickness of the counterweight (14) is L, and L > 5 mm, and H > 2.2 L. Within the projection plane of the axial end face of the rotor core (11), the area of ​​the rotor core (11) is S1, where S1 is the area after removing all axial through holes on the rotor core (11), and the area of ​​the counterweight (14) is S2, where S2 is the area after removing all axial through holes on the counterweight (14). Furthermore, ρ1*S1*H*D1^2+ρ2*S2*L*D2^2>1760Kg·mm^2, where ρ1 is the density of the rotor core, ρ2 is the density of the counterweight, and H≤35mm.

9. The motor rotor assembly according to claim 2, characterized in that: The rotor core (11) has a circular through hole (19) and an oblong flow hole (18). The through hole (19) is located on the outer periphery of the flow hole (18) and in the projection plane of the axial end face of the rotor core (11). The main balance block (15) and the auxiliary balance block (16) are symmetrical with respect to the central axis of the rotor core (11). There are multiple through holes (19), which are spaced apart along the circumferential direction of the rotor core (11). There are multiple flow holes (18), which are spaced apart along the circumferential direction of the rotor core (11). Within the projection plane of the axial end face of the rotor core (11), the center of the main balance block (15) coincides with the center of one of the through holes (19), and multiple flow holes (18) are symmetrically arranged with respect to the axis of symmetry (20). The axis of symmetry (20) is located between two adjacent flow holes (18), and the axis of symmetry (20) passes through the center of the main balance block (15). Within the projection plane of the axial end face of the rotor core (11), the center of the secondary balance block (16) coincides with the center of one of the through holes (19), and the axis of symmetry (20) also passes through the center of the secondary balance block (16).

10. An electric machine characterized by: Includes the motor rotor assembly according to any one of claims 1-9.

11. A compressor characterized by: Includes the motor as described in claim 10.

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