Scroll-type fluid displacement apparatus having sealing means fo

Details Scroll-type fluid displacement apparatus having sealing means fo Scroll-type fluid displacement apparatus having sealing means fo

1996-04-17

1997-12-30

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418142, F01C 104, F01C 1908

Patent

active

057022410

ABSTRACT:
A scroll-type fluid displacement apparatus includes a first and a second scroll, each having an end plate and a spiral wrap extending from one side of the end plate. The spiral wraps interfit at an angular and radial offset to make a plurality of line contacts which define a pair of fluid pockets. A driving mechanism is operatively connected to the first scroll to orbit the first scroll relative to the second scroll while preventing rotation of the second scroll, to thereby change the volume of the pair of fluid pockets. Sealing elements are disposed in the axial ends of the spiral wraps for sealing a central portion of fluid pockets defined by the spiral wraps. Thus, the axial sealing of fluid pocket formed between the orbiting and fixed scroll is more secure in all process from the suction to the discharge stage. Further, the volumetric efficiency of the compressor increases.

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