HERMETIC RECIPROCATING COMPRESSOR

摘要

Disclosed herein is a compressor in which oil retained in a hermetic case may be raised through an inner circumferential surface of a rotating shaft. The rotating shaft is provided with a hollow portion, and a fixation shaft with a spiral wing is inserted into the hollow portion to raise oil. Also, a spiral groove is formed on an outer circumferential surface of the rotating shaft to cause the raised oil to descend and lubricate the outer circumferential surface of the rotating shaft, and the hollow portion and the spiral groove are connected to each other via a guide passage.

主权项

1. A compressor comprising:
a hermetic case to retain oil in a lower portion thereof; a frame accommodated in the hermetic case; a compression mechanism provided with a cylinder fixed to the frame, and a piston to reciprocate to compress a refrigerant in the cylinder; a power transmission mechanism provided with a stator fixed to the frame and a rotor adapted to rotate inside the stator; a rotating shaft coupled to the rotor to rotate together with the rotor and provided with an eccentric part to convert rotational motion of the rotor into translational motion of the piston and a hollow portion to raise the oil retained in the hermetic case; a fixation shaft inserted into the hollow portion of the rotating shaft, fixed to one of the stator and the frame; and a raising member to raise the oil retained in the hermetic case in cooperation with an inner circumferential surface of the rotating shaft when the rotating shaft rotates.