| abstract |
The application provides a magnetic suspension bearing protection device, a motor, a compressor and an air conditioner. This magnetic suspension bearing protection device includes the rotor, the thrust disc, preceding axial iron core, back axial iron core, the bearing frame, protection bearing and axial limit structure, the thrust disc is installed on the rotor, preceding axial iron core and back axial iron core are located the both ends of thrust disc, the bearing frame sets up for back axial iron core is fixed, the inner circle both ends of bearing frame all are provided with axial limit structure, the interior screw-thread fit of axial limit structure and bearing frame, and the outer lane axial position of locking protection bearing, be provided with backstop step and backstop shoulder on the rotor, backstop step and backstop shoulder form the spacing groove, the inner circle of protection bearing is located the spacing inslot. According to the magnetic suspension bearing protection device, when the rotor is unstable in the axial direction, the collision between the thrust disc and the magnetic suspension bearing can be effectively avoided, and the operation reliability of the magnetic suspension bearing is improved. |