Patent ID: 6290472
Filing Date: 2001-09-18
Classification: F01C,F04C

Abstract:
A hermetic rotary compressor assembly, comprising:a horizontally arranged housing;a main bearing disposed in said housing and subdividing said housing into a discharge chamber and a suction chamber, said main bearing including a suction port therethrough and a lubricant intake passage disposed therein, said lubricant intake passage being positioned radially between said suction port and said housing and in fluid communication with said suction chamber;a cylinder block and bearing assembly in said housing, said cylinder block and bearing assembly defining a cylindrical cavity;a roller piston disposed in said cavity;a motor drivingly coupled to said roller piston and disposed in said suction chamber;said cylinder block having a vane slot extending axially through said cylinder block and extending radially from an outside perimeter surface of said cylinder block to said cylindrical cavity; andat least a portion of said slot defined by a pair of substantially parallel sidewalls, a vane disposed in said slot and urged against said roller piston, said vane guided by said substantially parallel sidewalls, there being a clearance between said vane and said substantially parallel sidewalls; andsaid discharge chamber comprising a sump in which a pool of liquid lubricant is disposed, a lower portion of said vane and said clearance immersed in said liquid lubricant, whereby said vane is lubricated and a refrigerant gas seal is established between said clearance and said vane;wherein liquid lubricant accumulated in said suction chamber is transported through aspiration from said lubricant intake passage to said suction port.