A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic drive device for construction machinery
The purpose of the present invention is to limit wasted energy consumption due to throttled pressure loss of pressure compensated valve during combined operation in which two actuators with large maximum required flows are driven simultaneously, while also responding flexibly to the various flow balances required by the two actuators. When the required flow of a boom cylinder (3a) is smaller than a specified flow, the boom cylinder (3a) is driven by only the pressure oil discharged from a single flow-type main pump (202), and when larger than the specified flow, is driven by merging said pressure oil with the pressure oil discharged from the first discharge port (102a) of a split flow-type main pump (201). When the required flow of an arm cylinder (3b) is smaller than a specified flow, the arm cylinder (3b) is driven by only the pressure oil discharged from the second discharge port (102b) of a split flow-type main pump (102), and when larger than the specified flow, is driven by merging the pressure oils discharged from both the first and second discharge ports (102a, 102b).
Hydraulic drive device for construction machinery
The purpose of the present invention is to limit wasted energy consumption due to throttled pressure loss of pressure compensated valve during combined operation in which two actuators with large maximum required flows are driven simultaneously, while also responding flexibly to the various flow balances required by the two actuators. When the required flow of a boom cylinder (3a) is smaller than a specified flow, the boom cylinder (3a) is driven by only the pressure oil discharged from a single flow-type main pump (202), and when larger than the specified flow, is driven by merging said pressure oil with the pressure oil discharged from the first discharge port (102a) of a split flow-type main pump (201). When the required flow of an arm cylinder (3b) is smaller than a specified flow, the arm cylinder (3b) is driven by only the pressure oil discharged from the second discharge port (102b) of a split flow-type main pump (102), and when larger than the specified flow, is driven by merging the pressure oils discharged from both the first and second discharge ports (102a, 102b).
Hydraulic drive device for construction machinery
TAKAHASHI KIWAMU (author) / TSURUGA YASUTAKA (author) / TAKEBAYASHI YOSHIFUMI (author) / MORI KAZUSHIGE (author) / NAKAMURA NATSUKI (author)
2015-10-28
Patent
Electronic Resource
English