US 10,883,500 B2Granted

Co-rotating scroll compressor having displacement bearing

AssigneeLG Electronics Inc.

InventorsJaesang Lee, Nayoung Jeon, Byeongchul Lee

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Abstract

A co-rotating scroll compressor is provided in which a bearing configured to support a scroll is displaced by a torque repulsive force, which is applied to the bearing due to compression repulsion of a compressed fluid, the torque repulsive force is converted into a sealing force of compression chambers, which are defined by wraps of co-rotating scrolls such that the sealing force of the compression chambers is increased, and in which a bearing housing is rotatably installed in a housing accommodation hole, a rotational center of a second scroll is positioned at a position eccentric from a rotational center of a bearing housing, the bearing housing is rotated by the torque repulsive force applied to the second scroll, some of the torque repulsive force is converted into the sealing force against a sealing disturbing force.

Claims20

Dependent claims

A co-rotating scroll compressor, comprising:

a frame provided with a compression chamber the frame having a main frame and a sub-frame;
a first scroll and a second scroll including wraps disposed to face each other in the compression chamber and rotary shafts which are eccentric to each other, wherein the first scroll and the second scroll rotate relative to each other in a same direction, compress a fluid suctioned into the compression chamber, and discharge the compressed fluid outside of the compression chamber, the first scroll being installed in the main frame and the second scroll being installed in the sub-frame;
a fixed bearing installed in a bearing installation hole formed in the main frame to support the rotary shaft of the first scroll;
the installation of the second scroll in the sub-frame further including:
a moving bearing to support the rotary shaft of the second scroll;
a bearing housing provided with a bearing accommodation hole to accommodate the moving bearing;
and
a housing accommodation hole formed in the sub-frame to moveably accommodate the bearing housing,
wherein in the second scroll rotatably supported by the moving bearing, a real rotational center of the second scroll is movable in a direction parallel to a straight line that extends from the rotational center of the first scroll to a theoretical rotational center of the second scroll, the theoretical rotational center of the installed second scroll being based, at least in part, on an amount of pre-determined variation associated with the installation of the second scroll in to the sub-frame which thereby locates the theoretical rotational center of the second scroll at a position different from a position of the real rotational center of the second scroll, the position of the real rotational center of the second scroll being axially offset a predetermined distance from the position of the theoretical rotational center of the second scroll in a direction opposite to an acting direction of a torque repulsive force applied to the second scroll when the co-rotating scroll compressor is in operation, and
wherein the moving bearing that supports the rotary shaft of the second scroll converts some of the torque repulsive force into a seal force applied against a second sealing disturbing force so that the wrap of the second scroll is pressed against the wrap of the first scroll by the seal force.

7 more elements

A co-rotating scroll compressor, comprising:

a frame provided with a compression chamber;
a first scroll and a second scroll including wraps disposed to face each other in the compression chamber and rotary shafts which are eccentric to each other, wherein the first scroll and the second scroll rotate relative to each other in a same direction, compress a fluid suctioned into the compression chamber, and discharge the compressed fluid outside of the compression chamber;
a fixed bearing installed in a bearing installation hole formed in the frame to support the rotary shaft of the first scroll;
a moving bearing configured to support the rotary shaft of the second scroll;
a bearing housing provided with a bearing accommodation hole configured to accommodate the moving bearing;
and
a housing accommodation hole formed in the frame and configured to moveably accommodate the bearing housing, wherein the bearing housing is installed in the housing accommodation hole, wherein a rotational center of the second scroll is positioned at a position eccentric from a swing center in the bearing housing, and wherein the bearing housing is swung by a torque repulsive force applied to the second scroll, some of the torque a seal force against a sealing distribution force, and the wrap of the second scroll is pressed against the wrap of the first scroll by the seal force.

4 more elements

A co-rotating scroll compressor, comprising:

a frame provided with a compression chamber;
a first scroll and a second scroll including wraps disposed to face each other in the compression chamber and rotary shafts which are eccentric to each other, wherein the first scroll and the second scroll rotate relative to each other in a same direction, compress a fluid suctioned into the compression chamber, and discharge the compressed fluid to an outside of the compression chamber;
a fixed bearing installed in a bearing installation hole formed in the frame to support the rotary shaft of the first scroll;
a moving bearing configured to support the rotary shaft of the second scroll;
a bearing housing provided with a bearing accommodation hole configured to accommodate the moving bearing;
and
a housing accommodation hole formed in the frame and configured to movably accommodate the bearing housing, wherein the bearing housing is installed in the housing accommodation hole, a rotational center of the second scroll is positioned at a position eccentric from a rotational center in the bearing housing, and the bearing housing is rotated by a torque repulsive force applied to the second scroll, some of the torque repulsive a seal force against a sealing distribution force, and the wrap of the second scroll is pressed against the wrap of the first scroll by the seal force.

4 more elements

Dependencies are inferred from the claim text.