Hermetic reciprocating compressor
AssigneeSamsung Electronics Co., Ltd.
InventorJung Hyoun Kim
Life of this patent
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Abstract
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.
Claims8
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 an inside of 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 spiral member inserted into the hollow portion of the rotating shaft, and coupled to an inner circumferential surface of the rotating shaft to rotate together with the rotating shaft to raise the oil retained in the hermetic case in cooperation with the inner circumferential surface of the rotating shaft,
- wherein the hollow portion has a length which extends substantially the entire length of the rotating shaft, and the spiral member extends substantially the entire length of the hollow portion;
- and
- a stationary fixation shaft inserted into the hollow portion, within the spiral member, that does not rotate with the rotating shaft,
- wherein a spiral groove is formed on an outer circumferential surface of the rotating shaft such that raised oil lubricates the rotating shaft while descending through the spiral groove.
A compressor comprising:
- a case to retain oil in a lower portion thereof;
- a frame accommodated in the case;
- a compression mechanism provided with a cylinder fixed to the frame, the compression mechanism 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 provided with a hollow portion;
- a stationary fixation shaft inserted into the hollow portion of the rotating shaft, fixed to one of the stator and the frame,
- wherein the oil retained in the case is raised through a gap formed between an inner circumferential surface of the rotating shaft and the fixation shaft;
- and
- a spiral member inserted into the hollow portion of the rotating shaft, surrounding the fixation shaft, and engaged with the inner circumferential surface of the rotating shaft to rotate together with the rotating shaft,
- wherein the hollow portion has a length which extends substantially the entire length of the rotating shaft, and the spiral member extends substantially the entire length of the hollow portion;
- and
- wherein a spiral groove is formed on an outer circumferential surface of the rotating shaft such that raised oil lubricates the rotating shaft while descending through the spiral groove.
Dependencies are inferred from the claim text.