Rotary compressor
AssigneeLG Electronics Inc.
InventorsMinho Lee, Yongkyu Choi, Bumdong Sa
Life of this patent
Estimating the term…
Abstract
In a rotary compressor, at least any one of a main bearing or a sub-bearing may have at least one axial-direction support portion that extends from an outer circumferential surface of a back pressure pocket and is formed to have a predetermined depth. The compressor may increase an oil film pressure that supports a roller in an axial direction thereof to stably support the roller including a rotational shaft in the axial direction, thereby effectively suppressing or preventing friction loss and abrasion between the roller and the main bearing facing the roller and between the roller and the sub-bearing.
Claims23
A rotary compressor, comprising:
- a casing;
- a cylinder that is disposed in an inner space of the casing to define a compression space;
- a roller that is disposed on a rotational shaft and configured to be rotatable in the inner space of the cylinder;
- at least one vane that is slidably inserted into at least one vane slot formed in the roller to rotate together with the roller;
- and
- a main bearing and a sub bearing respectively disposed on both sides of the cylinder in an axial direction to define the compression space together with the cylinder, wherein at least one of the main bearing or the sub bearing has at least one back pressure pocket formed at a predetermined depth in a sliding surface facing an axial side surface of the roller, wherein at least one axial support portion that extends from an outer circumferential surface of the at least one back pressure pocket is formed at a predetermined depth in the sliding surface, and wherein a circumferential length of the at least one axial support portion is shorter than a circumferential length of the at least one back pressure pocket.
A rotary compressor, comprising:
- a casing;
- a cylinder that is disposed in an inner space of the casing to define a compression space;
- a roller that is disposed on a rotational shaft and configured to be rotatable in the inner space of the cylinder;
- at least one vane that is slidably inserted into at least one vane slot formed in the roller to rotate together with the roller;
- and
- a main bearing and a sub bearing respectively disposed on both sides of the cylinder in an axial direction to define the compression space together with the cylinder, wherein at least one of the main bearing or the sub bearing has at least one back pressure pocket formed at a predetermined depth in a sliding surface facing an axial side surface of the roller, and wherein a plurality of axial support portions is formed in the sliding surface, each of the plurality of axial support potions being a groove that extends from an outer circumferential surface of the at least one back pressure pocket.
Dependencies are inferred from the claim text.