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US 9,039,388 B2Granted
Hermetic compressor
AssigneeLG Electronics Inc.
InventorsJaechan An, Keunju Lee, Hongseok Seo, Jeongmin Han, Jeonghun Kim
Life of this patent
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Abstract
A compressor has a rotational driver in a hermetic container, a rotational shaft coupled to the rotation driver, and a compression mechanism coupled to the rotational shaft to inhale and compress refrigerant. In addition, a first bearing fixed to the compression mechanism supports the rotational shaft, and a second bearing is separated from the first bearing on the rotational shaft. The gap between the shaft and the first bearing is set to control a gap between the shaft and the second bearing.
Claims9
A compressor, comprising:
- a hermetic container;
- a rotation driver in the container;
- a rotational shaft coupled to the rotation driver;
- a compression mechanism, coupled to the shaft, to inhale and compress refrigerant;
- a first bearing to support the shaft;
- and
- a second bearing fixed to the container to support the shaft, wherein the first and second bearings are separated by a predetermined distance, wherein the following relation is satisfied to reduce friction loss between the second bearing and the shaft and to maintain bearing function between the second bearing and the shaft:
- 50 μm+d/1000<D−d<90 μm+d/1000
- where D is an inner diameter of the second bearing, and d is a diameter of the shaft, and wherein the second bearing includes:
- a frame adjacent to an inner circumferential surface of the container;
- a housing having at least one support protrusion detachably coupled to the frame and a bearing protrusion that protrudes toward the first bearing from the at least one support protrusion;
- and
- a bearing bush disposed at an inner portion of the bearing protrusion to face the shaft.
10 more elements
A compressor, comprising:
- a hermetic container;
- a rotational driver in the container;
- a rotational shaft coupled to the rotation driver;
- a compression mechanism, coupled to the shaft, to inhale and compress refrigerant;
- a first bearing to support the shaft;
- and
- a second bearing to support the shaft, wherein the first and second bearings are separated by a predetermined distance and G1<G2, where G1 is a gap between an outer surface of the shaft and a surface of the first bearing and G2 is a gap between the outer surface of the shaft and a surface of the second bearing, wherein the following relation is satisfied to reduce friction loss between the second bearing and the shaft and to maintain bearing function between the second bearing and the shaft:
- 50 μm+d/1000<D−d<90 μm+d/1000
- where D corresponds to an inner diameter of the second bearing and d corresponds to a diameter of the shaft, and wherein the second bearing includes:
- a frame adjacent to an inner circumferential surface of the container;
- a housing having at least support protrusion detachably coupled to the frame and a bearing protrusion that protrudes toward the first bearing from the at least one support protrusion;
- and
- a bearing bush disposed at an inner portion of the bearing protrusion to face the shaft.
10 more elements
A compressor, comprising;
- a rotational shaft;
- a compression mechanism coupled to the shaft;
- a first bearing to support the shaft;
- and
- a second bearing to support the shaft, wherein a first and second bearings are arranged at different locations relative to the shaft, wherein a first clearance between the shaft and the first bearing is set to control a second clearance between the shaft and the second bearing, the first clearance being set to cause the second clearance to have a value within a predetermined range, wherein the following relation is satisfied to reduce friction loss between the second bearing and the shaft and to maintain bearing function between the second bearing and the shaft:
- 50 μm+d/1000<D−d<90 μm+d/1000
- where D is an inner diameter of the second bearing and d is a diameter of the shaft, and wherein the second bearing includes:
- a frame adjacent to an inner circumferential surface of the container;
- a housing having at least one support protrusion detachably coupled to the frame and a bearing protrusion that protrudes toward the first bearing from the at least one support protrusion and a bearing bush disposed at an inner portion of the bearing protrusion to face shaft.
6 more elements
Dependencies are inferred from the claim text.