Coating structure for a movable member in a compressor
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKiyohiro Yamada, Masao Iguchi, Izuru Shimizu, Yasushi Watanabe
Life of this patent
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Abstract
A movable member slides on a fixed member. The movable member is made of aluminum alloy. An inner layer coats the movable member. The inner layer is made of a material capable of adhering to the aluminum alloy. An outer layer coats the inner layer and contacts the fixed member. The outer layer has greater hardness than the hardness of the inner coating layer.
Claims23
A compressor having a movable member that slides on a fixed member, said compressor comprising:
- said movable member being made of aluminum alloy;
- an inner layer coating said movable member, said inner layer being made of a material capable of adhering to the aluminum alloy;
- and
- an outer layer coating said inner layer and contacting the fixed member, said outer layer having greater hardness than the inner layer.
A scroll type compressor having a movable scroll eccentrically mounted on a rotary shaft to perform an orbital movement about an axis of the rotary shaft without rotating about an axis of the movable scroll, wherein the movable scroll slides on a fixed scroll to continuously reduce a volume of a compression chamber defined between two scrolls, whereby refrigerant gas is compressed in the compression chamber, said compressor comprising:
- said movable scroll being made of aluminum alloy;
- an inner layer coating on said movable scroll, said inner layer being made of a material capable of adhering to the aluminum alloy;
- and
- an outer layer coating on said inner layer and contacting the fixed scroll, the outer layer having greater hardness than the inner layer.
A scroll type compressor having a movable scroll eccentrically mounted on a rotary shaft to perform orbital movement about an axis of the rotary shaft without rotating about an axis of the movable scroll, wherein the movable scroll slides on a fixed scroll to continuously reduce a volume of a compression chamber defined between said two scrolls, whereby refrigerant gas is compressed in the compression chamber, said compressor comprising:
- said movable scroll being made of aluminum alloy and having a movable wall formed integrally therewith;
- a fixed wall, disposed adjacent to the movable wall and opposed to said fixed scroll via the movable scroll, for receiving a pressure of the compressed refrigerant gas acting on the movable scroll;
- a ring, disposed between the movable wall and the fixed wall, for transmitting said pressure from the movable scroll to the fixed wall via the movable wall;
- an inner layer coating the movable scroll, said inner layer being made of nickel-phosphorus alloy;
- and
- an outer layer coating the inner layer and contacting the fixed scroll, said outer layer being made of nickel boron alloy and having greater hardness than the inner layer.
In an apparatus having a movable member and a fixed member having respective engagement surfaces in substantially slidable engagement with each other, the improvement comprising
- a coating on said engagement surface of one of said members, said one member being of an aluminum alloy,
- said coating comprising an inner layer of a nickel-phosphorous alloy plated on to said engagement surface of said one member, and an outer layer of a nickel alloy plated on to said inner layer and having a hardness greater than that of said inner layer, said outer layer being in slidable engagement with said engagement surface of the other of said members.
Dependencies are inferred from the claim text.