A high-speed permanent magnet motor capable of rotor dynamic balancing inside the motor

Abstract

The application aims to provide a high-speed permanent magnet motor capable of rotor dynamic balancing in the motor, comprising a shell, an end cover, a rotor and a thrust disc, the end cover is installed at the end of the shell, the rotor is installed in the shell and the end cover, the thrust disc is installed outside the rotor and between the shell and the end cover, the shell outside the thrust disc is provided with an unbalance screw replacement channel, the thrust disc is radially provided with a thrust disc balancing hole, and the inner wall of the thrust disc balancing hole is provided with a thread, the rotor is provided with balancing holes at the end face of the output end and the radial end face of the thrust disc, which not only simplifies the structure of the rotor dynamic balancing but also can perform dynamic balancing after the motor is assembled, saves time and labor, and reduces the damage of multiple disassembly and assembly to the motor structure, the rotor can be balanced at two end faces at the same time, one end can be balanced with the thrust disc at the same time, or both end faces can be balanced with the thrust disc at the same time, and the efficiency and precision of the rotor dynamic balancing are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a permanent magnet motor, in particular to a high-speed permanent magnet motor. BACKGROUND

[0002] For high-speed motor, even if the rotor has a small amount of unbalance, it will cause the motor to vibrate too much, and even cause damage to the motor. At present, the dynamic balance test and correction of the rotor are mostly carried out at room temperature, while the rotor usually operates in a high temperature environment, and temperature changes often cause new unbalance of the rotor, so the rotor needs to be dynamically balanced again after the motor is assembled. SUMMARY

[0003] The purpose of the present application is to provide a high-speed permanent magnet motor that can dynamically balance the rotor inside the motor without disassembling the motor.

[0004] The purpose of the present application is achieved in that:

[0005] The high-speed permanent magnet motor that can dynamically balance the rotor inside the motor comprises a shell, an end cover, a rotor, and a thrust disc, the end cover is installed at the end of the shell, the rotor is installed in the shell and the end cover, the thrust disc is installed outside the rotor and between the shell and the end cover, the shell outside the thrust disc is provided with an unbalance screw replacement channel, the thrust disc is provided with a plurality of thrust disc balance holes in the radial direction, and the inner wall of the thrust disc balance hole is provided with a screw thread.

[0006] The present application can also include:

[0007] 1. The rotor is provided with a rotor balance hole in the axial direction on the end face of both ends, and the inner wall of the rotor balance hole is provided with a screw thread.

[0008] 2. The front end and the rear end of the inner wall of the shell are respectively provided with a left foil radial bearing and a right foil radial bearing matched with the rotor, and the bearing seats of the left foil radial bearing and the right foil radial bearing are fixed on the inner wall of the shell.

[0009] 3. The left foil thrust bearing and the right foil thrust bearing are respectively installed at the left end and the right end of the thrust disc, the bearing seat of the left foil thrust bearing is fixed on the inner wall of the shell, and the bearing seat of the right foil thrust bearing is fixed on the inner wall of the end cover.

[0010] 4. The thrust disc is in interference fit with the rotor.

[0011] 5. The number of the thrust disc balance holes is 36, which are uniformly arranged.

[0012] 6. The number of the rotor balance holes is 16, which are uniformly arranged.

[0013] The advantages of the present application are:

[0014] 1. The rotor designed in this invention has balance holes on the output end face and the radial end face of the thrust plate. This not only simplifies the structure of rotor dynamic balancing but also allows dynamic balancing to be performed after the motor is assembled, saving time and effort and reducing damage to the motor structure from repeated disassembly and assembly.

[0015] 2. The balance screws on both ends of the rotor designed in this invention are set screws. After the balance screws are installed, the connection between the motor output end and the driven end is not affected.

[0016] 3. The rotor designed in this invention can be balanced on both end faces simultaneously. It can be balanced on one end with the thrust plate at the same time, or on both end faces with the thrust plate at the same time, which improves the efficiency and accuracy of rotor dynamic balancing. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0018] Fig. 2 This is a structural diagram of the rotor and thrust disk;

[0019] Fig. 3 This is a perspective view of the entire invention. Detailed Implementation

[0020] The invention will now be described in more detail with reference to the accompanying drawings:

[0021] Combination Figs. 1-3 This invention discloses a high-speed permanent magnet motor capable of internal rotor dynamic balancing, comprising a housing 1, a rotor 2, a left foil radial bearing 3, a right foil radial bearing 4, a thrust disk 5, a left foil thrust bearing 6, a right foil thrust bearing 7, an end cover 8, a motor stator 10, and a motor magnet 11. The bearing seats of the left foil radial bearing 3, the right foil radial bearing 4, and the left foil thrust bearing 6 are connected to the housing 1 by bolts, and the bearing seat of the right foil thrust bearing 7 is connected to the end cover 8 by bolts. The rotor 2 is supported by the left foil radial bearing 3 and the right foil radial bearing 4. The two ends of the thrust disk 5 are the left foil thrust bearing 6 and the right foil thrust bearing 7, respectively. The motor stator 10 and the motor magnet 11 are located outside the rotor 2.

[0022] Reference Fig. 2 The rotor 2 has 16 balancing holes evenly spaced axially on its output end face, and the inner walls of the balancing holes are threaded. The rotor 2 is equipped with a thrust plate 5, which has 36 balancing holes evenly spaced radially on its thrust plate, and the inner walls of the balancing holes are threaded. The thrust plate 5 and the rotor 2 are interference fit.

[0023] Reference Fig. 3 An unbalance screw replacement channel 9 is provided at the position of the thrust plate corresponding to the housing 1.

Claims

1. A high-speed permanent magnet motor capable of rotor dynamic balancing within the motor, characterized in that: The system includes a housing, end caps, a rotor, and a thrust disk. The end caps are installed at the ends of the housing, the rotor is installed inside the housing and the end caps, and the thrust disk is installed outside the rotor, located between the housing and the end caps. An unbalanced screw replacement channel is provided on the outer side of the housing of the thrust disk. The thrust disk has radially formed thrust disk balance holes with threads on the inner walls. The rotor has axially formed rotor balance holes on both end faces, with threads on the inner walls. A left foil radial bearing and a right foil radial bearing, respectively, are installed at the front and rear ends of the housing's inner wall, respectively, to mate with the rotor. The bearing seats of both the left and right foil radial bearings are fixed to the inner wall of the housing. A left foil thrust bearing and a right foil thrust bearing are installed at the left and right ends of the thrust disk, respectively. The bearing seat of the left foil thrust bearing is fixed to the inner wall of the housing, and the bearing seat of the right foil thrust bearing is fixed to the inner wall of the end cap. The thrust disk and rotor have an interference fit. The thrust disk has 36 evenly distributed balance holes, and the rotor has 16 evenly distributed balance holes.

Images