HYDRAULIC MOTOR AND HYDROHAMMER BASED ON IT Russian patent published in 2015 - IPC E02D7/10 

FIELD: construction.

SUBSTANCE: group of inventions relates to the field of construction, namely, to the devices used for driving piles into the ground, piling bar, pipes and other building elements. Hydrohammer comprises the upper and lower cases, guide rails fixed in the upper and lower cases, helmet fixed in the lower case, hydraulic motor, comprising the pressure valve, containing the case, seat, dividing valve, designed with hole, connecting the cavities with each other from side of its front and rear ends, control pistons, drain valve, comprising the case, seat, separating valve, designed with hole, connecting the cavities with each other from side of its front and rear ends, control pistons, hydraulic cylinder, fixed on the upper case and comprising the piston, rod, connected with piston, rod cavity, constantly connected with the discharge manifold, and piston cavity connected both through the pressure valve to the discharge manifold, or through the drain valve to the drain manifold, impact weight moving up and down along the guide rails and connected to the rod, control unit, sliding valve, connected to the control unit and pressure and drain valves. Hydrohammer is provided with flam rod, disposed in the piston cavity of hydraulic cylinder and connected with piston. The discharge valve in the hydraulic motor is further comprising the spring, disposed between the valve body and control piston.

EFFECT: exclusion of "short circuit" effect is provided in case of pressure change-over between the pressure and drain pipelines during operation of hydrohammer with frequency from 120 to 240 beats per minute, increase of fast action, reliability and stability of operation are achieved and, as a consequence, the increased efficiency factor of hydrohammer.

8 cl, 1 dwg, 1 tbl