Heavy long rod hoisting mechanism hydraulic system and control method
A lifting mechanism and hydraulic system technology, which is applied in the field of heavy-duty long-rod lifting mechanisms, can solve problems such as inability to completely offset the unbalanced moment of the system, difficult precise positioning of large load mechanisms, and prominent nonlinear features, etc., to achieve lightweight requirements , Improve the overall performance and simplify the mechanical structure
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[0015] combine figure 1 , a hydraulic system of a heavy-duty long-rod lifting mechanism of the present invention, including a double quantitative vane pump 1, a first straight-through check valve 2, a first flip-chip oil filter 3, a pilot overflow valve 4, Superimposed pressure compensator 6, proportional servo valve 7, two-way hydraulic lock 8, double speed control valve 9, second straight-through check valve 10, second flip-chip oil filter 11, direct-acting overflow valve 12, Proportional pressure reducing valve 14, three-position four-way O-type median function electromagnetic reversing valve 16, superimposed one-way throttle valve 17, oil tank 21, three-chamber power hydraulic cylinder 18, heavy-duty long rod mechanism 19;
[0016] The double quantitative vane pump 1 includes a large pump 1-1 and a small pump 1-2, wherein the large pump 1-1 is connected to the first flip-chip oil filter 3 through the first straight-through check valve 2, and the The extracted hydraulic oi...
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