Fluid machinery having a sealing member between stepped spirals

Details Fluid machinery having a sealing member between stepped spirals Fluid machinery having a sealing member between stepped spirals

1997-03-14

1999-07-27

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 554, F01C 104, F01C 1906

Patent

active

059279583

ABSTRACT:
A fluid machinery is disclosed which is able to assure a large compression volume without an increase in size and achieve high compressibility by suppressing leakage from sealing, thereby improving the reliability. In the fluid machinery, a second spiral 13 having a spiral inner engaging surface 17 formed to have a stepped shape in section is engaged with a first spiral 15 having an outer engaging surface 21 with a stepped sectional shape which rises upwardly from an outer peripheral side to a central side in a spiral manner, so that sealed spaces 25 are formed to cause reduction in volume of sealed spaces in both radial and height directions from a peripheral side to a central side. A closed spaces 35 having an inclination surface 19 is formed between a stepped surface of the outer engaging surface 21 of the first spiral 15 and a stepped surface of the inner engaging surface 17 of the second spiral 13. A spiral member 37 having a slant surface 39 which engages always with the inclination surfaces 19 is provided in the sealed spaces 35 so as to seal the lower pressure sealed spaces 25 and the higher pressure sealed spaces 25.

REFERENCES:
patent: 801182 (1905-06-01), Creux
patent: 4199308 (1980-04-01), McCullough
patent: 5603614 (1997-02-01), Sakata et al.

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