| 摘要 |
PURPOSE:To improve the lubrication and sealing performance at both sides of a rotor, by forming a spiral groove in the bearing section of a shaft while feeding a highly viscous oil from an oil sump to the back of a vane and both sides of a rotor. CONSTITUTION:Spiral grooves 17a, 17b are formed in the bearing sections 9a, 9b of a shaft 8 while winding to the right and left respectively to provide the pumping function where it will advance toward a rotor 2 as the rotation of the shaft 8. With such structure highly viscous refrigerated oil 15 stored in an oil sump 13 provided at the low pressure section of a compressor is sucked and fed into a vane groove 3, while when bringing the pressure in the vane groove 3 higher than the sucked pressure, said oil 15 will perform the lubrication and the sealing. |
