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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshiyuki Futagami, Hideo Hirano, Hideto Oka, Masahiro Tsubokawa
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When sliding elements, slide bushings, vanes and Oldham rings employed in various types of refrigeration compressors and other applications meet the following conditions, they resist sticking to aluminum-base components, resist depletion of the oil film on slide faces, and exhibit excellent wear resistance. Firstly, the elements must comprise an iron-base sinter having closed cells on at least the slide face. Secondly, in order for the oil film to be maintained on the slide face by the closed cells and to enhance lubricating properties, the proportion of closed cells having circular-equivalent diameter of 10 μm or less, i.e. the number of ≦10 μm cells/total number of cells, must equal 85% or more, and the opening area of the closed cells on the slide face must equal 5% or less. Finally, the sliding element density must be 7.3 g/cm3 or higher.
A sliding element comprising an iron-base sinter having closed cells, wherein a proportion of said closed cells having a circular-equivalent diameter of 10 μm or less to a total number of cells equals 85% or more, and a cell opening area on a slide face equals 5% or less of said total number of cells.
A refrigeration compressor, comprising:
A refrigeration compressor according to claim 6, wherein said iron-base sinter sliding element is produced by multiple iterations of pressing followed by sintering.
A refrigeration compressor, comprising:
A refrigeration compressor comprising:
Dependencies are inferred from the claim text.