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US 7,878,777 B2Granted
Scroll compressor having grooved thrust bearing
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsShigeki Iwanami, Sanemasa Kawabata, Tadashi Hotta
Life of this patent
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Abstract
A scroll compressor is disclosed. A plurality of grooves (85) communicating with each other are formed on a sliding surface of a thrust bearing (53) subjected to the axial force received by a movable scroll (32). The areas surrounded by the plurality of the grooves (85) make up a plurality of insular pressure receiving portions (83) independent of each other. The pressure receiving portions (83) represent at least one half of the area of the sliding surface.
Claims19
A scroll compressor comprising:
- a fixed scroll fixed on a housing;
- a movable scroll arranged in opposed relation to the fixed scroll and adapted to revolve with respect to the fixed scroll on a rotary shaft thereby to compress a fluid;
- a thrust bearing arranged on the back surface of the movable scroll for receiving the axial force;
- and
- a lubricating oil supply means for supplying the lubricating oil to the thrust bearing;
- wherein the thrust bearing includes a donut-shaped first member formed with a plurality of grooves and a plurality of pressure receiving portions defined by the plurality of the grooves and a donut-shaped second member in sliding contact with the first member,
- wherein the plurality of the pressure receiving portions are arranged only on radially outside an envelope plotted by an inner peripheral edge of the second member by the relative motion of the first member and the second member, and
- wherein the plurality of the pressure receiving portions are formed on a surface that faces the second member.
5 more elements
A scroll compressor comprising:
- a fixed scroll fixed on a housing;
- a movable scroll arranged in opposed relation to the fixed scroll and adapted to revolve with respect to the fixed scroll on a rotary shaft thereby to compress a fluid;
- a thrust bearing arranged on the back surface of the movable scroll for receiving the force in axial direction;
- and
- a lubricating oil supply means for supplying the lubricating oil to the thrust bearing;
- wherein the thrust bearing includes a donut-shaped first member formed with a plurality of grooves and a plurality of pressure receiving portions defined by the plurality of the grooves and a donut-shaped second member in sliding contact with the first member;
- wherein the plurality of the pressure receiving portions are arranged only on radially inside an envelope plotted by an outer peripheral edge of the second member by the relative motion of the first member and the second member, and
- wherein the plurality of the pressure receiving portions are formed on a surface that faces the second member.
5 more elements
A scroll compressor comprising:
- a fixed scroll fixed on a housing;
- a movable scroll arranged in opposed relation to the fixed scroll and adapted to revolve with respect to the fixed scroll on a rotary shaft thereby to compress a fluid;
- a thrust bearing for receiving the axial force received by the movable scroll;
- and a lubricating oil supplier for supplying the lubricating oil to the thrust bearing,
- wherein the thrust bearing includes a plurality of grooves formed on a sliding surface thereof and communicating with each other,
- wherein the plurality of the grooves include an outermost peripheral groove, which extends along an outer peripheral edge of the thrust bearing, and
- wherein the thrust bearing includes an annular sealing portion between the outermost peripheral groove and the outer peripheral edge of the thrust bearing.
4 more elements
A scroll compressor comprising:
- a fixed scroll fixed on a housing;
- a movable scroll arranged in opposed relation to the fixed scroll and adapted to revolve with respect to the fixed scroll on a rotary shaft thereby to compress a fluid;
- a thrust bearing for receiving the axial force received by the movable scroll;
- and
- a lubricating oil supplier for supplying the lubricating oil to the thrust bearing,
- wherein the thrust bearing includes a plurality of grooves formed on a sliding surface thereof and communicating with each other to define a plurality of insular pressure receiving portions independent each other, and
- wherein a bottom surface of the grooves is formed to a higher degree of roughness than the insular pressure receiving portions.
4 more elements
Dependencies are inferred from the claim text.