Rotative machine for fluids with spiral-like passages and vane wheels

A rotative machine for fluids comprising first and second stator plates with spiral-like passages, a rotor disc facing said stator plates mounted for rotation relative thereto on a common axis and carrying, on its face in front of the passages, vane wheels mounted for rotation on axes transverse to the said common axis whose vane circulate in the passages where they form fluid compartments completed by the cooperating surfaces of the stator and of the rotor covering the passages, characterized by the fact that the rotor has vane wheels cooperating, by their diametrally opposite parts, simultaneously with the passages of the first stator which extend between a first inlet chamber and a first outlet chamber and with the passages of the second stator which extend between a second inlet chamber and a second outlet chamber, the fluid passages connecting the first inlet and first outlet chambers of the first stator do not communicate with the fluid passages connecting the second inlet and second outlet chambers of the second stator, whereby the pressure exerted by fluid circulating in said machine against said vanes is in the same direction on each side of said rotor so that said vane wheels operate as thrust bearings in said rotor.