This article is a draft on mechanics.
You can share your knowledge by improving it (how?) according to the recommendations of the corresponding projects.
Like all hydraulic motors, vane motors provide a rotary motion, they are of a different technology than the hydraulic pump, but must be equipped with springs to push the pallets in the absence of centrifugal force at the beginning of the rotation .
Main advantage of this technique: excellent starting torque about 90 to 95% of the stall torque, possible performance due to the perfect balancing of the rotor insensitive to the pressure Δ between A and B in the starting phase.
Geometrical characteristic: As the cylindrical (or oval) stator has a radius of curvature greater than that of the rotor, the two surfaces (rotor - stator) can not get close to the high point, as the piston does in its cylinder . In the case of incompressible liquids, this limitation is minor (neutral recirculation of a small volume of liquid), but it results in a low compression ratio with the compressible gases, and reduces the efficiency of the vane motor projects. combustion. Note that the Quasiturbine is a borderline case with imperceptible deflection vanes, whose rotor and stator surfaces can marry exactly against one another to produce a high compression ratio. code
wiki
