Favorable Factory Price Delivery Valve 504660 for Simms Minimec Pumps

Injector pump is the engine's ‘heart’ once there is a failure will make the whole engine malfunction High-pressure fuel supply pump is an important part of the high-pressure common rail injection system for the high-pressure injection injector to provide stable and continuous high-pressure fuel injector pump plunger movement in the process of high-frequency movement of the outlet valve affects the reliability and stability of the valve when the high-pressure fuel leakage from the sealing surface ꎬ insufficient fuel pressure ꎬ common rail system. When the high pressure fuel leaks from the sealing surface, the fuel pressure in the common rail system is insufficient, leading to insufficient injection pressure of the injector and poor atomisation, which seriously leads to low engine power or even failure to start. In this paper, in order to solve the problem of high pressure sealing surface sealing failure caused by cavitation in the outlet valve, we analyse the structure of the outlet valve and optimise the structure of the valve through finite-element simulation calculations and experiments to validate that the optimised design is effective in solving the problem of cavitation.

The outlet valve is located on the upper part of the plunger of the injection pump and is connected to the high-pressure accumulator chamber. The outlet valve is a one-way valve and the fuel can only pass in one direction and in the opposite direction, which can seal the high-pressure fuel. The structure and working process of the outlet valve is as follows: when the cam rotates to the flat part of the cam profile, the plunger moves downward and negative pressure is generated in the plunger chamber. When the pressure difference between the inlet and the plunger chamber reaches the opening pressure of the valve, then, when the inlet spool travels downward, the valve will be opened and the fuel will be fed into the supplying pump by means of an inlet spool. When the cam rotates to the raised line plunger upward movement of the working chamber volume becomes smaller chamber pressure rises rapidly when the chamber high pressure top open the discharge valve spool high-pressure fuel flow to the common rail pipe when the plunger from the lower to the upper stop pumping process is over Injector pump plunger reciprocating process discharge valve spool frequent switching fuel pressure changes in large high-pressure sealing surface is prone to cavitation lead to the discharge valve sealing surface material spalling sealing surface. Oil valve sealing surface material flaking sealing surface failure sealing laxity of a land-based power generation diesel engine has occurred in a number of injection pump discharge valve cavitation failure endurance test 500 hours of high-pressure sealing surface of the discharge valve material flaking, sealing failure problem is far below the commonly used generator life requirements