When in operation, on the fuel injection pump camshaft. Under the action of the CAM on the top and the plunger spring, the plunger is forced to move up and down reciprocally.

To complete the oil pumping task, the oil pumping process can be divided into the following three stages. Conclusion: Through the above discussion, the following conclusions are drawn

The total stroke L of the plunger's reciprocating motion is constant and is determined by the lift of the CAM. The working stage of the khp series gear pump

The amount of fuel supply for each cycle of the plunger depends on the fuel supply stroke, which is not controlled by the camshaft and is variable.

③ The start time of fuel supply does not change with the variation of the fuel supply stroke. The working stage of the khp series gear pump

④ Rotating the plunger can change the end time of fuel supply, thereby altering the fuel supply volume.

The domestic series khp series gear pump. The domestic series of plunger pumps mainly include series A, B, P, Z, I, I, 1I, etc. Serialization is based on the different fuel supply requirements within the single-cylinder power range of diesel engines. It takes the plunger stroke, the center distance between the pump and the cylinder, and the structural type as the foundation, and then respectively adds plunger diameters of different sizes to form several fuel injection pumps with different fuel supply volumes within one working cycle, in order to meet the needs of various diesel engines. The working principle and structural type of domestic series fuel injection pumps are basically the same. Taking the A-type pump as an example for introduction.

The structure and working principle of the khp series gear pump. The plunger pump is composed of four major parts: the sub-pump, the oil volume adjustment mechanism, the transmission mechanism and the pump body. It is intelligently controlled by a microprocessor and displayed on a liquid crystal screen, which can communicate with a computer. It features stable working pressure, small pulsation and convenient operation. It is widely used in biochemical, pharmaceutical, chemical, environmental protection and other industries, meeting the requirements of continuous constant pressure and constant flow liquid transportation in the above industries.

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