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A platform for research: civil engineering, architecture and urbanism
Hydraulic drive device for construction machinery
In order to prevent the closing of a pressure compensation valve on a lower load-pressure side and thus to prevent a reduction in speed or stopping of the actuator on the lower load-pressure side when saturation occurs in a combined operation in which there is a large difference between the load pressures of two actuators, and in order to ensure the required amount of pressurized oil for the actuator on a higher load-pressure side and thus to prevent a reduction in speed or stopping of the actuator on the higher load-pressure side when saturation occurs in a combined operation in which there is a particularly large difference between the load pressures of the two actuators, switch valves (100f, 100g, 100h), which reduce the passage area of parallel oil passages (41f, 41g, 41h) when driving operation devices (34a, 34b) are operated, are arranged respectively in the parallel oil passages (41f, 41g, 41h).
Hydraulic drive device for construction machinery
In order to prevent the closing of a pressure compensation valve on a lower load-pressure side and thus to prevent a reduction in speed or stopping of the actuator on the lower load-pressure side when saturation occurs in a combined operation in which there is a large difference between the load pressures of two actuators, and in order to ensure the required amount of pressurized oil for the actuator on a higher load-pressure side and thus to prevent a reduction in speed or stopping of the actuator on the higher load-pressure side when saturation occurs in a combined operation in which there is a particularly large difference between the load pressures of the two actuators, switch valves (100f, 100g, 100h), which reduce the passage area of parallel oil passages (41f, 41g, 41h) when driving operation devices (34a, 34b) are operated, are arranged respectively in the parallel oil passages (41f, 41g, 41h).
Hydraulic drive device for construction machinery
TAKEBAYASHI YOSHIFUMI (author) / TAKAHASHI KIWAMU (author) / MORI KAZUSHIGE (author) / NAKAMURA NATSUKI (author)
2015-05-06
Patent
Electronic Resource
English