| 摘要 |
A trochoid-type rotary piston gas processing device comprising a stationary housing (1) having a continuous epitrochoidal sidewall including two semicircular lobes (11, 12) which intersect at a pair of opposed transition edges (13, 14), rotary piston means (3) having three flank surfaces (26, 27, 28) and rotatably received in the housing on an eccentric portion (5) of a crank shaft (4), one of said flank surfaces always being in engagement with at least one of said transition edges, cooperative mating gear means (26A, 30) on said housing and piston means to control rotation of said piston means and a gas inlet (42) and outlet (41) to each of said lobes. Sealing fluid (90) is admitted between the rotor means and housing. The housing sidewall and piston flank surfaces may be composed of a series of parallel planar surfaces (11A, 26A, 28A) and valve plate means (51, 71, 78, 83) may control the fluid to the gas inlets. The device may operate as a compressor, expander, or vacuum pump. |
