F - Mech Eng,Light,Heat,Weapons – 04 – C
Patent
F - Mech Eng,Light,Heat,Weapons
04
C
F04C 18/02 (2006.01) F01C 17/06 (2006.01) F04C 23/00 (2006.01) F04C 29/00 (2006.01) F04C 29/02 (2006.01)
Patent
CA 2275813
A scroll compressor having a suction pressure chamber into which fluid is received substantially at suction pressure and a discharge pressure chamber from which the fluid is discharged substantially at discharge pressure, including a first scroll member having a first involute wrap element projecting from a first substantially planar surface, a second scroll member having a second involute wrap element projecting from a second substantially planar surface, and third and fourth surfaces opposite the second substantially planar surface, the third and fourth surfaces respectively located in first and second planes which are spaced apart from each other and substantially parallel with the second substantially planar surface. The first and second scroll members are mutually engaged with the first involute wrap element projecting towards the second surface and the second involute wrap element projecting towards the first surface, the first surface positioned substantially parallel with the second surface whereby relative orbiting of the scroll members compresses fluids between the involute wrap elements. The engaged scroll members are in fluid communication with the suction and discharge chambers. A frame is provided having fifth and sixth surface located in different planes substantially parallel with the second substantially planar surface of the second scroll member, the fifth surface adjacent and opposed to the third surface of the second scroll member, and a sixth surface adjacent and opposed to the fourth surface of the second scroll member. A first seal is disposed between the third and fifth surfaces, the first seal in sliding engagement with one of the third and the fifth surfaces. A second seal is disposed between the fourth and sixth surfaces, the second seal in sliding engagement with one of the fourth and the sixth surfaces. An intermediate pressure chamber is in part bounded by the third and fourth surfaces of the second scroll member, the fifth and sixth surfaces of the frame, and the first and second seals, and is in fluid communication with a source of pressure intermediate suction and discharge pressures, whereby the first and second scroll members are at least partially urged into axial sealing engagement by forces induced by fluid pressure in the intermediate pressure chamber.
Sim & Mcburney
Tecumseh Products Company
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