Oiless rotary scroll air compressor crankshaft assembly

Details Oiless rotary scroll air compressor crankshaft assembly Oiless rotary scroll air compressor crankshaft assembly

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 29/00 (2006.01) F01C 17/06 (2006.01) F04C 18/02 (2006.01) F04C 29/02 (2006.01)

Patent

CA 2326309

A crankshaft assembly for a scroll compressor. The scroll compressor includes intermeshed and nested stationary and orbiting scroll elements which define at least one spiraling compression pocket therebetween and an orbital drive mechanism for driving the central axis of the orbiting scroll element about the central axis of the stationary scroll element while maintaining the orbiting scroll element substantially non-rotational with respect to the stationary scroll element. The crankshaft assembly of the orbital drive mechanism includes a crankshaft member having an elongated shaft portion for rotation about a central axis of rotation and an orbiting rotational bearing affixed to a first distal end of the crankshaft member. The center of rotation of the orbiting rotational bearing is radially offset with respect to the central axis of rotation of the crankshaft member and is adapted to accept and rotationally engage a hub portion projecting from the orbiting scroll element. Preferably, the orbiting rotational bearing is disposed within a recessed cup portion integrally formed on the first distal end of the crankshaft member, and a lubricating channel extends from an exterior surface of a second distal end of the crankshaft member to permit a lubricating agent such as grease to be injected. The crankshaft assembly additionally preferably includes main bearing and rear bearing components.

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