How to easily solve the oil trap problem in gear pumps
Oil entrapment in gear pumps is a common problem, but it can be easily solved in a variety of ways. Here are some effective solutions:
1. Check and replace the oil:
Check whether the oil in the gear pump meets the requirements. If the oil is too thick, too dirty or oxidized, it may cause oil entrapment.
Replace the appropriate oil or filter the existing oil to ensure that the oil is clean and has moderate viscosity.
2. Clean or replace the filter element:
The filter element of the gear pump may be clogged with dirt or impurities, causing oil entrapment.
Clean the filter element regularly or replace it with a new one to keep it unobstructed.
3. Check and replace the gears:
The gears of the gear pump may be worn or damaged, causing the liquid to not flow properly.
Check the degree of wear of the gears and replace new gears if necessary to restore the normal operation of the gear pump.
4. Adjust the pressure:
The pressure of the gear pump may be too high or too low, causing oil entrapment.
Keep the working pressure of the gear pump within the appropriate range by adjusting the pressure regulator or replacing the pressure regulator.
5. Check and replace seals:
Seals may be worn or aged, causing liquid leakage or failure to flow normally.
Check the condition of the seals and replace new seals if necessary to prevent liquid leakage.
6. Use the pressure relief groove method or pressure relief hole method:
Mill out the pressure relief groove on the end covers on both sides of the gear pump or drill the pressure relief holes on the tooth top and root of the driven gear.
When the volume of the closed oil chamber becomes smaller, it is connected to the pressure oil chamber through the pressure relief groove or pressure relief hole to avoid excessive local pressure; and when the volume of the closed oil chamber increases, it is connected to the suction chamber through the pressure relief groove or pressure relief hole to avoid the formation of local vacuum.
7. Correct the tooth shape or use helical gears/herringbone gears:
Correct the tooth shape of the gear to make it smoother and reduce the occurrence of oil entrapment.
Using helical gears or herringbone gears, the meshing process of these gears will not be sudden line contact and line disengagement like spur gears, but will gradually mesh and gradually retreat, so there will be no oil entrapment.
8. Increase the speed or inlet pressure of the gear pump:
Increase the speed of the gear pump to increase the outlet pressure of the pump.
Increasing the inlet pressure of the gear pump so that the suction pressure of the pump is greater than the steam pressure will help reduce the occurrence of oil entrapment.
