Scroll compressor having tip seals and idler crank assemblies

Details Scroll compressor having tip seals and idler crank assemblies Scroll compressor having tip seals and idler crank assemblies

1996-09-30

1998-06-02

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 554, 418 555, 418 57, 418142, F04C 1804, F04C 2700

Patent

active

057590206

ABSTRACT:
A scroll compressor includes a fixed scroll member and an orbiting scroll. The orbiting scroll member is operatively connected to a motor to be driven in an orbiting motion by the motor. The scroll members each include a plate having an inboard surface and an outboard surface. A spiral involute or wrap is formed on the inboard surface of each scroll member plate. The involutes mate to define suction zones at outer ends of the involutes and fluid pockets. The fixed scroll member defines a fluid outlet at the center of the involutes and two inlets positioned proximate the suction zones. At least two idler crank assemblies are provided to maintain the phase relationship and running clearance between the scroll members. The idler crank assemblies each include two operatively connected cranks, one being in the fixed scroll and one being in the orbiting scroll. The fixed scroll crank is externally accessible so that its rotational motion may be harnessed to drive a fan or another compressor stage, for example. Ribs are formed on the surfaces of the plates to facilitate heat dissipation and to make the scroll members more rigid. The involutes are provided with seals which seal against the plate of the opposing scroll member to seal the fluid pockets against leakage.

REFERENCES:
patent: 3994636 (1976-11-01), McCullough et al.
patent: 4065279 (1977-12-01), McCullough
patent: 4411605 (1983-10-01), Sauls
patent: 5258046 (1993-11-01), Haga et al.
patent: 5391065 (1995-02-01), Wolverton et al.

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