Diesel engine oil pump, we can understand it literally, it is one of the important components to ensure the normal operation of the entire diesel engine oil pipeline and to ensure the continuous conversion of diesel into electricity by the entire diesel generator set. Of course, the continuous operation of the oil pump The diesel oil-water separator is also inseparable from the transportation of diesel oil, which also ensures the cleanliness of the final diesel oil, so that the diesel oil can be fully burned.

First, the role of diesel fuel pump

The function of the diesel engine fuel pump is to ensure the normal flow of diesel in the low-pressure oil circuit, overcome the resistance in the diesel filter and the pipeline, and deliver enough diesel to the fuel injection pump at a certain pressure.

Second, the working principle of diesel oil pump

There are many kinds of oil transfer pumps used in diesel engines, such as piston type, internal and external rotor type, sliding vane type and diaphragm type. Piston oil transfer pumps are commonly used in small and medium power diesel engines. And the working principle is shown in the figure, the piston oil pump is mainly composed of a piston, a push rod, an oil outlet valve and a hand oil pump. Assembled with the fuel injection pump.

When the diesel engine is working, the camshaft of the fuel injection pump is driven to rotate by the crankshaft, and the eccentric wheel rotates accordingly. When the highest point of the convex part of the eccentric wheel rotates to the position of the push rod, as shown in the figure, the push rod is pushed and the piston moves to press the oil. At the same time, the piston spring is compressed. Due to the increase of diesel pressure in the oil chamber at the front end of the piston, the oil inlet valve is closed under the action of pressure, and the oil outlet valve is pushed open. The diesel oil in the oil chamber flows into the piston through the oil outlet valve and the upper oil outlet. In the oil cavity at one end of the push rod.

There is also a hand oil pump on the oil transfer pump. Its function is to manually use it to press oil into the oil supply system to remove the air in the oil passage when the diesel engine is not working. When it is turned on, the diesel will flow into the oil cavity of the hand oil pump, and then the piston will be pressed down, so that the oil inlet valve is closed and the oil outlet valve is opened. Tighten the screw plug to prevent air from entering the oil supply system when the diesel engine is working.

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