COMBINED DEVICE FOR UNLOADING AND PROTECTION AGAINST HYDRAULIC SHOCK FOR PRESSURE-LOADED RESERVOIRS WITH WORKING FLUID IN SYSTEMS OF WORKING FLUID SUPPLY TO HYDRODYNAMIC MACHINES Russian patent published in 2009 - IPC F16K31/122 F16K47/10 F16D33/16 

FIELD: instrument making.

SUBSTANCE: group of invention is related to combined devices for unloading and protection against hydraulic shock and is intended for pressure-loaded reservoirs with working fluid in systems of working fluid supply to hydrodynamic machines. Combined device (4) for unloading and protection against hydraulic shock comprises body (18), unloading valve (52), comprising inlet chamber (54) communicated with internal space (12) of reservoir (3) with working fluid, outlet chamber (55) communicated with its unloading space (13), valve body (56) installed with the possibility of displacement in body (18), valve seat (57) fixed in body (18), actuator (58) joined with valve body (56). Seat (57) is installed so that when interacting with body (56), it covers joint between inlet (54) and outlet (55) chambers. Device (53) for protection against hydraulic shock includes shock-resistant plate (37). Plate (37) is installed with the possibility of displacement outside body (18) on guide element fixed with body (56) of unloading valve (52). Guide element has thrust (41) on its end area inverted from body (56) for displacement of plate (37). Seat (42) is installed at the body (18). Seat (42), interacting with plate (37), locks inlet chamber (54). At least one throttling place (62) is installed between plate (37) and guide element. There is a system (2) for working fluid supply to hydrodynamic machines (1), including above mentioned combined device (4).

EFFECT: group of inventions is aimed at creation of more stable conditions in reservoir with working fluid in case of hydrodynamic machine emptying.

12 cl, 2 dwg