FIELD: machine building.
SUBSTANCE: actuator includes two pairs of hydraulic supports (HS) installed at the platform corners, hydraulic locks (HL) connected with their above-valve cavities to HS piston cavities, two two-position four-line distributors (TD), a flow dividing and summing device, two three-position distributors (ThD), two check valves and a bypass valve. ThD inlet and drain holes are connected to a power supply and a tank. One outlet hole of the first ThD is interconnected with HL control chambers of the first HS pair and with stock cavities of that HS pair. The other outlet hole of the first ThD is interconnected with the flow dividing and summing device with TD inlet holes. The first outlet holes of TD are interconnected with below-valves cavities of HL of the first HS pair. The second outlet holes of TD are interconnected with inlet holes of check valves, the outlet holes of which are connected to the inlet hole of the bypass valve. The outlet hole of the bypass valve is interconnected with the tank. Control chambers of HL of the second pair of HS are connected to the tank through the second outlet holes and drain holes of the corresponding TD. One outlet hole of the second ThD is interconnected with HL control chambers of the second HS pair and with stock cavities of that HS pair. The other outlet holes of the second ThD is interconnected with below-valve cavities of HL of the second HS pair.
EFFECT: improving reliability of the actuator when performing working operations.
1 dwg
