SLIDE PISTON Russian patent published in 2006 - IPC F15B13/12 

FIELD: hydraulic drives; steering boosters.

SUBSTANCE: slide piston has slide and rod, which are both connected by wire. There is a dead axial hole in rod at side being opposite to slide; the hole is filled with fluid. Inside hole the first screw spring is mounted as well as load and second screw spring drawn in by bushing. Bushing is mounted for movement relatively rod and it is provided with element to fix the rod relatively rod. Load is made in form of cylinder and it is mounted relatively rod's wall to have radial gap, which gap is defined by formula and is dependent on density and cinematic viscosity of working fluid, on diameter of load, length of load without guides and viscous friction factor. Amplitude of oscillations of slide piston is reduced at frequency being close to resonant frequency of hydraulic distributor at reduction in weight of slide piston and the same sizes of piston. Effect of suppression of automatic oscillations is based upon dynamic extinguishing.

EFFECT: high speed of operation; improved efficiency of operation.

1 dwg