Reciprocating compressor in which a blowby gas can be returned into a suction chamber with a lubricating oil within a crank chamber kept at a sufficient level

摘要

A plurality of cylinder bores are circumferentially formed in a cylinder block around its center axis to receive a plurality of pistons, respectively. The cylinder block has one end closed by a front housing to define a crank chamber. The cylinder block has another end closed by a rear member in which a discharge chamber and a suction chamber are formed. A drive shaft penetrates the front housing and has one end supported by the cylinder block through a block-side bearing. Following a rotary motion of the drive shaft, a swash-plate element drives a reciprocating motion of the piston within the bore. A blowby gas leaking into the crank chamber is introduced into the suction chamber a gas passage through an gap inevitably left between the drive shaft and the block-side bearing back.