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Adjusting Method Of Hydraulic Pump For Digging Machine

     One, excavator hydraulic Pump Displacement adjustment method: ⑴ first, in the hydraulic system of the multi-way reversing valve in the middle of the oil channel to set a throttle port, the variable pump outside the installation of a number of pilot valves; ⑵ using shuttle valve group to select the largest pilot pressure to control the displacement of hydraulic pump, according to the pilot pressure of the largest valve opening to control the displacement of the hydraulic pump, the other valves are not involved in the control process, at the same time the valve operation to calculate a single flow; ⑶ in the main valve to reserve a hydraulic pump electrical control device, The pilot pressure of each main valve is converted into an electrical signal using a pressure transducer, and the microprocessor adds all the electrical signals and controls the displacement of the hydraulic pump through a proportional adjustment valve; ⑷ by testing the main hydraulic pump outlet pressure, according to the curve calculation to obtain another displacement value of the main pump, and then according to the two values to adjust the displacement of the main pump, the corresponding parts of the excavator installed pressure sensor, dip sensor, displacement sensor, The controller compares the test data with the corresponding boundary conditions of the excavator in each working condition to distinguish the working mode of the current excavator.Hydraulic Pump
     The beneficial effect of the displacement adjustment method of the excavator hydraulic pump is to reduce the flow loss of the hydraulic pump when the main control valve is in the middle position. The output flow of hydraulic pump According to the operator's operation, the response time is shorter, the flow fluctuation is smaller, the operability is better, can improve the work efficiency, at the same time, causes the system heating to reduce, the fuel consumption reduces, achieves the energy saving goal.Hydraulic Pump
     Second, a excavator hydraulic pump flow Adjustment Practice steps: 1, excavator main pump flow adjustment (1) Loosen the Flow lock nut (2) Rotation pressure adjustment bolts, until the pressure meets the requirements (3) when the system pressure in the 14700 17700kPa range, clockwise rotation flow adjustment bolts 1/4 laps, the flow is increased by about 18l/min, at this time the first stage spring works. When the system pressure in the 23500 34300kPa fan, clockwise rotation flow adjustment 1/4 laps, the flow rate increases about 7l/min, at this time the second stage spring function (4) If the counterclockwise rotation flow adjustment bolts, then the flow reduces the corresponding number town (5) Tighten the flow lock nut, tighten the torque to (12 plus or minus 3) N·m. (6) The same method of adjusting the flow of pump and lower pump Hydraulic Pump
     2, excavator main pump maximum flow adjustment: (1) loosen the flow lock nut. (2) Twist the flow adjustment bolts until the flow reaches maximum value. Clockwise rotation flow adjustment bolts 1/49, flow about reduce 13l/min. Counterclockwise rotation flow adjustment bolts 1/4 laps, flow about increase 13l/min (3) Tighten the flow lock nut, tighten torque for 10n·m Hydraulic Pump
3, Excavator Reverse flow adjustment: (1) loosen the flow lock nut mouth (2) twist the flow adjustment bolts until the flow reaches the largest town. Rotate the flow to adjust the bolt 1/4w. When the system pressure is 2500kPa, the flow rate is about to decrease./-n: The reverse NJ needle rotates the flow adjustment bolts 1/4 laps, the flow approximately increases 4l/min. (3) Tighten the flow lock nut, tighten the torque to (12 plus or minus 3) N·m Hydraulic Pump