HYDROPISTON PUMP Russian patent published in 2004 - IPC

FIELD: hydraulic transportation of hard loose materials.

SUBSTANCE: invention can be used for transfer of abrasive polydispersion hydraulic mixtures of materials differing in grain size, density and concentration in working liquids of any density and viscosity. Pump contains working cylinders with floating hydraulically operated working piston butt-joined through end faces with control cylinders with floating hydraulically operated control pistons connected with working pistons by rods. Drive pump contains pressure pipeline to deliver drive liquid into behind-the-piston rod spaces of working cylinders through flow distributor with servoswitches controlled by delivery and suction end transmitters installed on ends of control cylinders. Rod and piston spaces of control cylinders are connected to each other by connecting pipelines to provide alternate flow of control liquid at different working conditions and accelerated return of suction pistons relative to delivery ones by means of adjustable feed throttles and safety-overflow valves.

EFFECT: provision of uniform deliveries without fluctuations under transient conditions of reversing of working pistons, reduced wear and improved reliability of pump in operation.

3 cl, 3 dwg