Scroll-type fluid machinery with seals for the discharge port and wraps

A scroll-type fluid machine comprising:

• a rotatable main shaft having a bearing section;
• an orbiting scroll supported on said main shaft and having axially projecting involute wraps projecting from opposite sides thereof, each of said axially projecting involute wraps having an end surface;
• a pair of stationary scrolls each having an involute wrap which mate with one of said axially projecting involute wraps of said orbiting scroll and specular surfaces between turns of said involute wrap which oppose said end surfaces of said axially projecting involute wraps;
• a plurality of slave cranks which support said stationary scrolls and said orbiting scroll so that said orbiting scroll is orbited without spinning by a rotation of said main shaft;
• first needle roller bearings which support said main shaft at said bearing section;
• second needle roller bearings which support bearing sections of said slave cranks, thereby allowing said stationary scrolls to be slightly moved in a thrust direction;
• a land extending from each of said involute wraps of said stationary scrolls, said land having an upper surface parallel to said end surface and a discharge port formed in said upper surface;
• a belt-like chip seal, having a resilient member and a self-lubricating member, resiliently energized to approximately the same extent as the extent of movement of the stationary scrolls in the thrust direction, said chip seal disposed on the end surface of said axially projecting involute wraps and extending along said upper surface between said discharge port and an involute groove region formed between said land and said involute wrap, whereby said specular surfaces and said end surfaces form a space therebetween which is sealed by said chip seal, and said self-lubricating member contacts said specular surfaces.