Process / method
First, use the rules of the oil pumps and jack number hydraulic oil is usually the 10th or the 20th machinery oil, hydraulic oil can also be used other properties nearby, such as transformer oil. Oil poured into the tank through a filter is necessary. Filtration is often used once a month, the fuel tank should be regularly cleaned. Should generally adhere to the oil level in the tank is about 85%, and should be insufficient to replenish, replenish oil should the original pump oil numbers are the same. Oil fuel tank shall normally be 10 ~ 40 ℃ is appropriate, should not be used at negative temperature.
Second, the tubing pressure to avoid bending at work and cohesion pump jack tank should adhere to clean, when not in use with a screw dam, avoid sediment into the oil pump and nozzle revealed jack to use nuts sealed to prevent dust, miscellaneous substance into the machine. After daily use, the pump should wipe, eradicate grease consider oil on copper silk.
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Third, the pump should not work under overload safety valve shall be additional hydraulic device to adjust the pressure, prohibit arbitrary adjustment.
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Fourth, grounding power, chassis ground wire is necessary to view the line insulation condition only after the trial work.
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Five former high-pressure pumps work should release all the oil control valve, then start the pump, empty load of work to be normal, then closed return valve, the stem gradually screwed into the oil, increasing the load, and pay attention to the gauge Pointer is not normal.
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Sixth, the pump should stop the job first return valve gradually loosened until the gauge gradually return to zero, before breaking jack tubing connector nut. Removable tubing or pressure gauges and other prohibited when the load.
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Seven, cooperation dual effect of oil pump jack in order to use the two together duplex oil pump is appropriate.
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Eight, oil resistant rubber tube high voltage necessary work shall not exceed the maximum hydraulic pressure of the hydraulic pump extra or actual job. Tubing length less than 2.5m. When a femoral artery and two pump jack, tubing standard should work together.
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Precautions
Removable tubing or pressure gauge prohibition load
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When the job, under the injection pump camshaft cam and the plunger stretched spring effect, forcing the plunger for the upper and lower reciprocating motion, and then complete the mission oil pump, oil pump process can be divided into the following three periods.
Into the oil process
When the cam bumps turn over some, in effect stretched spring force, the piston moves downward, the plunger upper space (called pumping chamber) occurred vacuum, when the end face of the plunger on the piston sleeve into the hole open, the full oil passage in the upper body pump diesel into the pumping chamber through the hole, the plunger is moved to the lower dead point, into the oil is completed.
Fueling process
When the camshaft to the cam roller raised some jacking body, the plunger spring is stretched tight, the upward movement of the plunger, the fuel pressure, a through hole flow back into the fuel injection pump some oil chamber upper body. When the plunger cover the top hole of the upper edge of the sleeve to travel, because the plunger and the sleeve with a small space (0.0015-0.0025mm) pump oil chamber of the plunger at the top of the oil into a sealed chamber, column Cypriots continued to rise, active hydraulic pump oil chamber increased, pumping pressure> outlet valve spring force + high pressure hose stretched remaining pressure, open the valve, high pressure diesel fuel through a valve into the high pressure tubing, after injection It is injected into the combustion chamber.
Back to oil process
Plunger up oil, when the uplink to the chute (stop for the edge) on the plunger back hole on the sleeve and connected, low pressure oil pump oil chamber and then the head of the plunger hole and radial holes and chutes exchange, hydraulic suddenly reduced, the oil valve in the stretched spring force effect active closed, continuous supply. Thereafter the plunger but also upstream, when the cam bumps turn over some, under the effect of stretched spring plunger and down. At this time began the next cycle.
