Scroll type fluid machinery

摘要

Scroll type fluid machinery, in which two stationary scrolls (2A, 2B) are fixed onto a housing (1), and form volume changing mechanisms (50A, 50B) with matching orbiting scrolls (3A, 3B). Three orbiting units (40) are located between the two volume changing mechanisms. Each orbiting unit comprises a rotating member (10) and a thrust-cancelling shaft (20). Assembly sets of the thrust-canceling shaft consist of turning elements and a connector, which in turn connects with orbiting scrolls through threads. There exists only circumferential constraint but no axial constraint between the connector and the turning element. Rotating turning element will rotate the connector, and thus move the two orbiting scrolls closer or farther through the threads on the connector. The rotating member of this invention further provides a larger space to the supporting bearings (14A, 14B) of the thrust-canceling shaft, and also eases component manufacturing, machinery's assembly and adjustment, and bearings' cooling.

主权项

1. A scroll type fluid machinery comprising:
a. a first volume changing mechanism comprising a first stationary scroll and a first orbiting scroll; a second volume changing mechanism comprising a second stationary scroll and a second orbiting scroll; b. a housing connecting with said first and second stationary scrolls; and c. a plurality of orbiting units provided between said first and second volume changing mechanisms, with each said orbiting unit comprising:
a). a rotating member being rotatably supported on said housing; andb). a thrust-canceling shaft connecting with one end thereof to said first orbiting scroll and with the other end thereof to said second orbiting scroll, being eccentrically and rotatably supported in said rotating member, and comprising one or more assembly sets, with each comprising:
a] a connector connecting at least one of said first and second orbiting scrolls through threads; andb] one or more turning elements constraining said connector circumferentially while allowing said connector to move axially.