Frequency-conversion pump controlled steering hydraulic system for loader
A technology for steering hydraulics and loaders, which is applied to fluid pressure actuating system components, mechanical equipment, accumulator devices, etc. Effect
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[0014] Specific implementation of technical solution 1 of the present invention: when the loader is started, the pressure sensor (14) transmits the pressure signal of the accumulator (12) to the controller (9), and the controller (9) determines that the accumulator ( 12) Whether the pressure meets the requirements. When the pressure in the accumulator (12) is low, the controller (9) controls the AC motor (4) to start, and controls the proportional valve (13) to open, and the three-position four-way reversing valve (10) and the on-off valve (16) are closed, at this time, the quantitative pump (6) is driven by the AC motor (4) to fill the accumulator (12) with high-pressure oil; when the pressure of the accumulator (12) is higher When it is high, the loader can start normal operation. The highest pressure in the accumulator (12) is the overflow pressure of the overflow valve (17), and the lowest pressure should be greater than the average pressure of the steering hydraulic cylin...
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