Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1997-06-10
1999-03-30
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 554, 418 556, 418 91, 418178, F04C 1804, F04C 2902
Patent
active
058880577
ABSTRACT:
A scroll-type refrigerant fluid compressor includes a fixed scroll having a first circular end plate from which a first spiral wrap extends, and an orbiting scroll having a second circular end plate from which a second spiral wrap extends. The spiral wraps interfit each other at an angular and radial offset to form line contacts defining a pair of sealed-off fluid pockets. An anti-wear plate is disposed on one end surface of the second circular end plate of the orbiting scroll that engages with the second spiral element of the orbiting scroll. An annular boss is formed at a central portion of the other end surface of the second circular end plate of the orbiting scroll. An inner end of a drive shaft is operatively connected to the orbiting scroll through a bushing which is rotatably disposed within the boss. An axial hole is centrally formed through the second circular end plate of the orbiting scroll. Mists of the lubricating oil suspended in the refrigerant gas in a central fluid pocket are conducted to an inner space of the boss via an air gap between the second spiral wrap and the anti-wear plate, fine reticular paths at the second circular end plate of the orbiting scroll beneath the anti-wear plate, and the axial hole.
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Kitano Norio
Takahashi Takeo
Yamamoto Tamaki
Sanden Corporation
Vrablik John J.
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