| 摘要 |
FIELD: hydraulic actuating mechanisms, namely systems with servomechanisms without control devices, particularly in pump stations of powered timbers for automatically discharging pumps. SUBSTANCE: automatic unit includes housing with connecting ducts, return valve, relief valve with cone closing member, servovalve. The last has stem contacting with successively arranged pushing plungers. Cavity under central pushing plunger is separated from supply duct by throttling passage and it is connected with hydropneumatic accumulator. Cavity embedding spring of servovalve is connected with control cavity of relief valve by means of one throttle and with supply duct - by means of another throttle. EFFECT: enhanced reliability, efficiency and dynamic properties of hydraulic system. 1 dwg |
