| 摘要 |
FIELD: machine building. ^ SUBSTANCE: hydraulic drive includes tank, pump, safety valve, distributor, hydraulic cylinder, with force application point located between wing rotation axis of opening superstructure and tail part of this wing with counterbalance, brake valves, return valves in communication lines of distributor with hydraulic cylinder; at that, stock cavity of hydraulic cylinder is connected to its piston cavity through in-series installed brake and return valves, and piston cavity of hydraulic cylinder is connected through the other brake valve with drain. ^ EFFECT: owing to installation in communication line between stock and piston cavities of hydraulic cylinder of brake and return valves, and connection of this line, control line of brake valve, with communication line of distributor with piston cavity of hydraulic cylinder at the point located between distributor and return valve installed in this line the cost saving is reached. ^ 2 cl, 1 dwg |
