Ferrous sintered alloy vane and rotary compressor
AssigneeNippon Piston Ring Co., Ltd.
InventorSoichi Shimomura
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Abstract
A vane used in a rotary compressor, and rotary compressor including the vane are made from a ferrous sintered alloy. The method comprises the steps of preparing metal powder mixture primarily containing iron, compacting the powder mixture to obtain a powder compact, sintering the powder compact to obtain a sintered body, subjecting sub-zero treatment to the sintered body, and tempering the sintered body. The sintered alloy product is used as a vane slidably disposed in a vane groove of the rotary compressor whose cooling medium is maintainable without deterioration of its property.
Claims5
A vane for use in a rotary compressor employing a cooling medium, said vane comprising a ferrous sintered alloy product produced by the steps of:
- preparing metal powder mixture primarily containing iron;
- compacting said powder mixture to obtain a powder compact;
- sintering said powder compact to obtain a sintered body;
- subjecting sub-zero treatment to said sintered body;
- tempering said sub-zero treated sintered body;
- and
- machining said sintered body, whereby said cooling medium is maintained without deterioration of its property upon operation of said rotary compressor.
A rotary compressor comprising:
- a casing;
- a rotor housing disposed in said casing and formed with a groove;
- a rotor eccentrically rotatable in said rotor housing;
- a vane disposed slidable relative to said groove and in sliding contact with said rotor, said vane being formed of a ferrous sintered alloy which is subjected to sub-zero treatment after sintering and prior to tempering.
Dependencies are inferred from the claim text.