Positive displacement machine having rotating vanes and a non-circular chamber profile

摘要

PCT No. PCT/FR96/00210 Sec. 371 Date Aug. 6, 1997 Sec. 102(e) Date Aug. 6, 1997 PCT Filed Feb. 8, 1996 PCT Pub. No. WO96/24754 PCT Pub. Date Aug. 15, 1996A positive-displacement machine with movable sealing members (4) including at least one encased system which essentially comprises a casing consisting of a cylindrical tubular portion (1) with a non-circular directrix (10), and two sealing flanges; and a cylindrical piston (2) having a circular directrix (20) and being provided with grooves (3) for guiding the sealing members in the piston, said piston having a rotary connection to the casing. The directrix of the tubular portion of the casing consists of n arcs of conformity and n bows restricting the motion of the sealing members in the grooves. The bows are defined by solving a set of equations.