Scroll-type machine with compact Oldham coupling

Details Scroll-type machine with compact Oldham coupling Scroll-type machine with compact Oldham coupling

1998-10-05

2000-09-05

Denion, Thomas

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 553, 418102, F01C 102

Patent

active

06113371&

ABSTRACT:
A scroll compressor has a fixed scroll and an orbiting scroll nested with one another within a shell. The orbiting scroll has a base plate with a pair of opposed slots formed therein, and a spiral wrap extending axially from the base plate. The fixed scroll has a base plate and a spiral wrap extending axially from the fixed scroll base plate nested with the spiral wrap of the orbiting scroll. A pair of towers extends axially downwardly from the fixed scroll base plate, each tower having a slot formed therein, diametrically opposed from the slot formed in the other tower. An Oldham coupling has an annular ring with an irregular oval profile which closely follows the outermost radial surface of the spiral wraps as the scroll compressor operates. The Oldham coupling also has an asymmetric shape with respect to any vertical plane bisecting a central axis of the Oldham coupling. A pair of opposed keys extend axially from a first surface of the Oldham coupling slidingly engaging the slots in the towers. A second pair of opposed keys extend axially from a second surface of the Oldham coupling slidingly engaging the slots in the base plate of the orbiting scroll. The keys and slots interact as the orbiting scroll is driven by an eccentric pin on a crankshaft to create a non-rotating orbiting motion for the orbiting scroll.

REFERENCES:
patent: 3924977 (1975-12-01), McCullough
patent: 4065279 (1977-12-01), McCullough
patent: 4325683 (1982-04-01), Miyazama
patent: 4655696 (1987-04-01), Utter
patent: 4992033 (1991-02-01), Caillat et al.
patent: 5551851 (1996-09-01), Williams et al.
patent: 5588820 (1996-12-01), Hill et al.
patent: 5593295 (1997-01-01), Hill

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