Power control valve and loader quantitative-variable hydraulic system
A power control valve and hydraulic system technology, which is applied in pump control, mechanical equipment, machine/engine, etc., can solve the problems of insufficient power input and large proportion of input power in the walking system, and achieve a wide range of power adjustment and reduce the size of the pump. Displacement, the effect of improving the life of components
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[0027] Specific embodiments are described below with reference to the accompanying drawings.
[0028]In this embodiment, the fixed variable hydraulic system of the loader includes a load sensitive variable pump 1, a quantitative pump 5, a distribution valve 14, a pilot valve 11, a shuttle valve 10, a working oil cylinder, a fuel tank 4, a hydraulic steering system, and a two-position four-way valve. 9. Power control valve 2, the working cylinder includes a bucket cylinder 16, a boom cylinder 17, and the hydraulic steering system includes a load-sensitive steering gear 12, a load-sensitive flow amplifying valve 13, and a steering cylinder 15; the load-sensitive steering gear 13 and the load-sensitive flow Amplifying valve 13 is connected and controls steering cylinder 15 connected to load-sensing flow amplifying valve 13 via load-sensing flow-amplifying valve 13 , the main oil port of load-sensing variable pump 1 is connected to load-sensing flow-amplifying valve 13 , and load-s...
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