Repair method of plunger pump of universal testing machine

The plunger pump is an important device in the hydraulic system. It relies on the plunger to reciprocate in the cylinder, so that the volume of the sealed working chamber changes to achieve oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation.

Universal testing machinePlunger pump

When the holes of the plunger pump of the universal test machine are worn and the matching gap increases by 15% to 20% compared with the specified value of the product drawing, a new plunger should be remade and the holes should be repaired. The matching gap between the plunger and its matching hole should reach the specified value.

Second, the oil distribution plate of the hydraulic system of the universal tester has wear or strip-like scratches, which can be repaired by grinding.

Third, there are strip-like scratches or wear on the end surface of the rotor body, and it needs to be ground and repaired.

Fourth, insufficient elastic force of the variable control spring will affect the performance of the variable and the spring needs to be replaced.

Fifth, when the valve core and valve hole of the variable control valve wear out, the fitting gap increases by 15% to 20% compared to the specified value of the product drawing, the valve core needs to be remade and the holes are repaired.

Sixth, when the volume efficiency of the pump of the universal test machine is reduced by 10% to 15% compared to the specified value, it needs to be repaired.

The above six points are the aspects that the plunger pump can be repaired. The plunger pump is an important part of the universal testing machine. If it is damaged, it can still be repaired and reused, without the need to replace the whole machine. As a universal testing machine manufacturer, when conducting after-sales service, the part that causes the failure is found based on the equipment failure performance. If the plunger pump is faulty, targeted repairs will be carried out according to the above situation.

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