2012年8月21日星期二

Slider the hydraulic works


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The slider works on the hydraulic presshydraulic bolt

Fast downstream of the solenoid is energized, the pilot valve and the cylinder main valve left intervention system, pilot-operated check valve is opened on the hydraulic cylinder rapid downstream. At this time, the oil flow in the system as follows

Into the oil; hydraulic pump - sequence valves - on the cylinder valve - check valve - on the hydraulic cylinder chamberhydraulic adapter fittings

Back to the circuit: the cylinder valve on the hydraulic cylinder - pilot controlled check valve - inferior vena - laid-off valve - tank

On the slider under its own weight to decline rapidly. A smaller flow of the hydraulic pump, when the oil tank via hydraulic check valve inflow on the hydraulic cylinder chamber.

Slow pressure from the slider contacts the workpiece, this time on the hydraulic cylinder on the cavity pressure, the pilot-operated check valve is closed, the compression speed will be det ermined by the hydraulic pump flow, fluid flow and rapid downstream when the same

3 Paul rolling. When the system pressure to the pressure relay air role, then issue the electrical signal to control the electromagnet power failure, the pilot valve and the cylinder valve in the system into packing. The pressure is controlled by time relay in the electrical control circuit 0min-24min within the regulation. Packing addition to the hydraulic pump unloading at a lower pressure when there is no fluid flow in the system. Hydraulic pump unloading oil are as follows

Hydraulic pump - sequence valves - Business cylinder valve - hydraulic cylinder valve - tankhydraulic testing machine

4 quickly return to the time relay delay to pressure to spend the night, the solenoid is energized, pilot valve right intervention system, pressure relief valve so that the hydraulic cylinder valve on the right of access system. At this time, the pilot controlled check valve is opened, on the hydraulic cylinder rapid return


(5) in situ stopped. On the slider rise to the block hit the in situ limit switch, solenoid power, the pilot valve and hydraulic cylinder valve are in the median. At this time, the hydraulic cylinder stops moving. Hydraulic pump at a lower pressure to write and unloading.
 

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