PRESSURE DIFFERENCE OIL SUPPLYING DEVICE FOR ROLLING PISTON TYPE COMPRESSOR

PURPOSE:To preclude inflow of excessive amount of lubricating oil into suction chamber and prevent generation of abnormal compression as well as abnormal sound by a method wherein one end of an oil supplying passage is opened in lubricating oil and the other end thereof is opened in a space at the inner peripheral side of the rolling piston to supply proper amount of oil to respective sliding parts. CONSTITUTION:One end 15a of the oil supplying pipe 15 is opened in the lubricating oil 11 and the other end 15b thereof is opened in the internal space 16 of the rolling piston 4. A pressure in the internal space 16 of the rolling piston 4 becomes an intermediate pressure between a suction pressure and a delivery pressure, therefore, the pressure difference between both ends 15a, 15b of the oil supplying pipe 15 is reduced remarkably compared with conventional embodiments. The lubricating oil, supplied into the space 16, lubricates the eccentric sliding part 3a of a crankshaft 3 and the bearing sections 9a, 10a of side plates 9, 10 and is discharged finally through a minute gap between both end faces 4b, 4c of the rolling piston 4 and the side plates 9, 10, however, the amount of discharging lubricating oil is very small and generation of abnormal compression or abnormal sound may be prevented.