Improvements in Thrust Balancing in Rotary Machines

摘要

1,177,236. Bearings. ATLAS COPCO A.B. 6 June, 1967 [23 June, 1966], No. 26046/67. Heading F2A. [Also in Division F1] In a rotary compressor, a rotor 6 is supported at one end by a roller bearing 8 and biased towards a gear casing 2 by an annular wavyspring 35 acting upon a ball-bearing 9, axial thrust exerted on the latter by the spring and the working fluid acting on the rotor being partially balanced by an opposing axial thrust of an annular piston 36 to which pressure is applied through a pipe connection 40, thus minimizing the load on the bearing 9. It is indicated that the piston may be fixed relative to the casing of the compressor and a cylinder 37 therefor rendered movable axially.