What is the working principle of an oil pump?
1 Answers
The operation of an oil pump is achieved through the reciprocating motion of the plunger. The specific working principle is as follows: The suction and compression of oil by the oil pump are accomplished by the reciprocating motion of the plunger within the plunger sleeve. When the plunger is in the lower position, the two oil holes on the plunger sleeve are opened, connecting the inner cavity of the plunger sleeve with the oil passage in the pump body, allowing fuel to quickly fill the oil chamber. When the cam contacts the roller of the roller body, the plunger rises. Due to the movement of the plunger, fuel is squeezed out from the oil chamber and flows into the oil passage. This stroke is called the pre-stroke. When the plunger blocks the oil hole, the oil compression process begins. As the plunger moves upward, the oil pressure in the oil chamber increases sharply. When the pressure exceeds the spring force of the outlet valve and the upper oil pressure, the outlet valve is pushed open, and the fuel is forced into the oil pipe and delivered to the injector. Maintenance of the oil pump should pay attention to the following aspects: Water can corrode the oil pump, so substances containing water are prohibited from being evacuated by the oil pump. For substances containing a large amount of solvent, first remove most of the solvent in an oven before using the oil pump for evacuation. Use the vacuum pump in the correct sequence to prevent backflow. After using the vacuum oven, be sure to clean it thoroughly, wiping the glass window of the vacuum oven. Wipe off the surface rust-proof oil. Remove the rust-proof oil from the inner cavity of the governor and the inner cavity of the fuel injection pump, and add the specified grade of lubricating oil.
