HERMETIC RECIPROCATING COMPRESSOR

摘要

A compressor according to one embodiment of the present invention enables oil contained inside a closed case to flow upwardly by the inner periphery of a rotary shaft. The rotary shaft includes a hollow unit, and a fixed shaft including a spiral blade making the oil flow upwardly is inserted into the hollow unit. A spiral groove is formed on the outer periphery of the rotary shaft and makes the oil flow downwardly and lubricates the outer periphery of the rotary shaft. The hollow unit and the spiral groove are connected by a guide passage.