Patent ID: 7789616
Filing Date: 2010-09-07
Classification: F04D

Abstract:
1. A rotor mechanism of a centrifugal compressor, the rotor mechanism being connectable to a power output device configured to block leakage of lubricants and to recycle lubricants to an oil sump, the rotor mechanism comprising: a rotary shaft comprising a drive side and a transmission side, and a connecting portion connected to the power output device, a rolling bearing, and a screw nut provided in sequence from the drive side to the transmission side, the screw nut being used to fasten and secure the rolling bearing in position in the rotary shaft and having an oil slinger facing the surface of the drive side; a bearing housing positioned at the drive side of the rotary shaft, configured to receive the rolling bearing, and having an oil-returning hole facing the drive side; and a bearing plate disposed around the screw nut and connected to the bearing housing, the bearing plate being further configured to secure the rolling bearing in position and having a first labyrinth seal in contact with a surface of the screw nut and an oil channel in contact with the oil-returning hole.