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Patent Searching and Data


Title:
SCROLL TYPE FLUID MACHINE
Document Type and Number:
Japanese Patent JPH02248676
Kind Code:
A
Abstract:

PURPOSE: To improve the abrasion resistance of a bearing hole while maintaining the processability and the intensity by making a crank shaft of the metal basic material coated with ceramic, and attaching a bush made of the metal impregnating carbon material to a bearing part of a turning scroll.

CONSTITUTION: A fixed scroll 1 and a turning scroll 2 are comprised, and while an eccentric part 3a where a shaft core is eccentrically displaced is provided in a crank shaft 3, and this crank shaft 3 is turnably engaged with a bearing hole 2a formed in a back surface of the turning scroll 2. The crank shaft 3 is supported by a roller bearing 5 attached to a block 4 and a bearing part 4a formed under the block 4. The crank shaft 3 is made of steel, and a titanium nitride plasma CVD layer 3b is formed in only the eccentric part 3a. The turning scroll 2 is made of cast-iron, and a bush 2c made of the aluminum impregnating carbon material is pressed-in the bearing hole 2a. The abrasion resistance of the bearing part can be thereby improved.


Inventors:
SAKAI TOSHIKAZU
Application Number:
JP1989000070942
Publication Date:
October 04, 1990
Filing Date:
March 23, 1989
Export Citation:
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Assignee:
MATSUSHITA REFRIGERATION
International Classes:
F01C21/02; F04C18/02; (IPC1-7): F04C18/02