| 摘要 |
A scroll pump includes a frame, a stationary plate scroll, an orbiting plate scroll, a non-energized type of tip seal or seals, an eccentric drive mechanism assembled to and supported by the frame and to which the orbiting plate scroll is assembled so as to be drivable by the eccentric drive mechanism in an orbit about a longitudinal axis of the pump, and an axial compliance system including a flexure. The flexure is interposed between a bearing of the eccentric drive mechanism and a flexure-locating surface of the eccentric drive mechanism. The flexure allows the orbiting plate scroll to move away from the stationary plate scroll in the case of an assembly process which would otherwise result in the tip seal(s) being too forcefully engaged with the plate of the opposing plate scroll. |
| 主权项 |
1. A scroll pump, comprising:
a frame; a stationary plate scroll fixed relative to the frame and having a stationary plate, and a scroll blade projecting axially from the stationary plate in a direction parallel to a longitudinal axis of the pump; an orbiting plate scroll including an orbiting plate, and an orbiting scroll blade projecting axially from the orbiting plate in a direction parallel to the longitudinal axis, and nested with the stationary scroll blade, at least one tip seal, each said at least one tip seal interposed between an axial end of the scroll blade of a respective one of the stationary plate and orbiting plate scrolls and the plate of the other of the stationary plate and orbiting plate scrolls; an eccentric drive mechanism supported by the frame and operative to drive the orbiting plate scroll in an orbit about the longitudinal axis, and including a counterbalance, a drive shaft, and bearings, the drive shaft comprising a crankshaft having a main shaft and a crank, the orbiting plate scroll being carried by the crank, and the main shaft of the crankshaft being supported by the frame via said bearings, and wherein the eccentric drive mechanism has an axially facing flexure-locating surface, one of the bearings is a flexure-locating bearing, the crankshaft is supported such that it is movable axially relative to the flexure-locating bearing, and the flexure-locating surface is a surface counterbalance; and a flexure axially interposed between said axially facing flexure-locating surface and said flexure-locating bearing, the flexure having compliance in an axial direction parallel to the longitudinal axis of the pump and configured to enable movement of the flexure-locating surface to position the orbiting plate scroll in the axial direction. |
