Gear pump fault diagnosis and troubleshooting

1, gear pump produces severe vibration and noise

1) caused by tight sealing. The solution: repair pump body and pump cover plane (0.005).

2) The shaft seal on the shaft seal aging. The solution: replacement.

3) less fuel tank, pump empty. Solution: Come on.

4) back to the oil pipe exposed liquid, instantaneous negative pressure to make the air back irrigation system. Solution: should be inserted into the liquid.

5) The pump is too high, the low speed is the pump oil chamber can not be vacuum and inhale the air. The solution: try to shorten the relative distance.

6) into the oil inlet resistance or large into the air into the oil pipe. The solution: cleaning filter or increase the amount of filtration or reduce the diameter.

2, due to mechanical vibration and noise

1) Pump and coupling coaxiality.

2) due to oil pump gear wear and tear caused by noise, replace the oil, and strengthen the filter. Solution: clean the pump or replace the pump.

3) poor pump needle roller bearings. Solution: replace the bearing.

3, other causes of vibration and noise

1) into the oil filter is blocked caused. Solution: wash the filter.

2) Large oil viscosity produces noise. Solution: Choose a reasonable solution.

3) oil into the oil aperture is too large to produce noise. Solution: appropriate to reduce the diameter.

4, gear pump output flow is not enough, the pressure does not go up

1) Suction into the oil blockage and lack of flow. Solution: wash the filter.

2) The pump discharge large and the flow is small. The solution: repair cover and gear face or change the pump.

3) The oil temperature is too high, the internal discharge pressure is low. Solution: refuel cooler.

4) The oil viscosity is too high, oil absorption resistance or viscosity is too low, large internal leakage. Solution: Choose the right hydraulic oil. General 32 (40 degrees)

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