Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1993-04-08
1993-10-26
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 57, F04C 1804
Patent
active
052560449
ABSTRACT:
Improved axial compliance in a scroll compressor 10 between a fixed scroll 11 and an orbiting scroll 13 is achieved by providing at least one dynamic back pressure chamber 25 disposed behind the orbiting scroll 13. A pressurized fluid is bled from a selected one of compression pockets 19 through a port 21 formed in the orbiting scroll 13 into the dynamic back chamber 25 to provide varying on sub-cycle basis back pressure to reduce friction between the fixed and orbiting scrolls. A static back pressure chamber 27, also disposed behind the orbiting scroll 13, may be provided into which pressurized fluid is bled from a selected one of the compression pockets 19 to provide an additional back pressure on the scroll 13 which is substantially constant over the cycle.
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Dynamic Axial Compliance to Reduce Friction Between Scroll Elements, Nieter et al., 1992 International Compressor Engineering Conference at Purdue, vol. III, Jul. 1992.
Barito Thomas R.
DeBlois Raymond L.
Marchese Anthony J.
Nieter Jeffrey J.
Carrier Corporation
Habelt William W.
Vrablik John J.
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