LUBRICATION OF HERMETICALLY SEALED ROTARY COMPRESSOR

摘要

In a rotary hermetic compressor an improved lubrication arrangement is provided for the sliding cylinder vanes (84). An oil pump (116) in the lower portion (62) of the crankshaft (26) extends into the oil sump (120) of the compressor. The oil pump comprises an axial aperture (116) in the crankshaft (26) which angles diagonally radially outwardly in the upward direction. Oil is pumped through this aperture (116) into an annulus (126) surrounding the crankshaft (26). A passageway (128) in the outboard bearing (56) conducts the oil radially outwardly from the annulus (126) and then upwardly against gravity to a vertical oil channel (134) which is open to both sides of the sliding vane (84) and adjacent thereto. The positive pressure provided by the oil pump will ensure that the oil channel (134) is filled with oil at all times. Excess oil exits at the upper end of the vane (84) through a relief in the main bearing (46) and then flows down around the cylinder (66) by gravity and into the oil sump (120).