| 摘要 |
This invention pertains to a multi-speed refrigerant compressor, for example, a two speed compressor operable at a relatively high speed and at a relatively low speed. Such compressor includes an electric drive motor having a fixed stator and a rotor electrically coupled to the stator and rotatable relative to the stator, a drive shaft or crankshaft driven by the rotor, and vibration dampening means engaging an end of the drive shaft or crankshaft preventing undesirable vibration thereof that could cause rubbing between the stator and the rotor of the electric drive motor during low speed operation, during high speed operation, switching from high to low speed operation, switching from low to high speed operation, start up at low speed, and start up at high speed operation. |
