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Mechanical maintenance of variable piston pump

Time:2019-04-15 10:26:02

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The plunger pump is adopted to supply oil. After 3000h, the operator shall check the plunger pump 1-2 times a day to check whether the sound of the hydraulic pump is normal. If it is found that the sp

The plunger pump is adopted to supply oil. After 3000h, the operator shall check the plunger pump 1-2 times a day to check whether the sound of the hydraulic pump is normal. If it is found that the speed of the hydraulic cylinder decreases or the engine is not running, it is necessary to disassemble the filling pump and check whether there are scratches on the edge of the impeller and whether the clearance of the inner gear pump is too large. For self-priming plunger pumps, the oil in the hydraulic tank shall not be lower than the lower limit of the oil mark, to maintain a sufficient amount of hydraulic oil. The cleaner the hydraulic oil, the longer the service life of the hydraulic pump.

The most important part of the plunger pump is the bearing. If the bearing has a clearance, the normal clearance of three pairs of friction pairs inside the hydraulic pump cannot be guaranteed. At the same time, the hydrostatic support oil film thickness of each friction pair will be destroyed, which will reduce the service life of the plunger pump bearing. According to the data provided by the hydraulic pump manufacturer, the average service life of the bearing is 10000h, beyond which a new port needs to be replaced. Disassembled bearing, no professional detection instruments can not detect the bearing clearance, can only use visual inspection, such as roller surface scratches or discoloration, must be replaced. In the replacement of bearings, should pay attention to the original bearing letters and models, plunger pump bearings are mostly large load capacity bearings, the purchase of the original manufacturers, the original specifications of the products, if the replacement of another brand, should consult the experienced personnel on the bearing table replacement, the purpose is to maintain the accuracy of the bearing grade and load capacity.

Plunger pump service life, and the usual maintenance, the quantity and quality of hydraulic oil, oil cleanliness and so on. It is also an effective way to prolong the service life of the plunger pump to avoid the abrasion caused by the particles in the oil. In maintenance replacement parts should try to use the original factory production parts, these parts are sometimes price is more expensive than other fake parts, but the quality and stability is better, if the purchase price cheap imitation parts, saving the cost seems to be in the short term, but it brings hidden trouble, may also use of plunger pump cause even more damage. The distribution plate has two forms: plane distribution plate and spherical distribution plate. The friction pair with spherical flow distribution is repaired by grinding when the scratches on the flow distribution surface of the cylinder block are relatively shallow. When the groove of the flow surface of the cylinder body is deep, the "surface engineering technology" method should be first used to fill the groove, and then grinding, not blind grinding, to prevent the copper layer thinning or oil leakage out of the steel base. Plunger pump can also be used to save energy inverter,

The engineer pointed out: plunger pump in the actual production process, usually running conditions are pressure or flow to adjust the working state. When the actual pressure is greater than the required pressure, it is adjusted by the overflow valve to keep the working pressure stable and allow the overflow valve to release the excess part. And the motor has been running at full speed repeated action, the same power consumption. When the overflow is used to adjust the pressure and flow, some allowance for the overflow back to the original system, resulting in the plunger pump is useless power, low working efficiency, if use after gen jie energy-saving frequency converter, overflow valve can be closed, it through energy-saving inverter itself automatically adjust the working pressure, maintain the stability of working pressure, the pressure of the automatic tracking devices. Realize automatic control, thus saving energy consumption. The biggest advantage of this regulation is that it can reduce the running energy consumption of the plunger pump, and the energy saving effect can reach more than 30%.


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