Aiming at the severe cavitation phenomenon of the distribution pair after the durability test of a certain type of fuel piston pump,the principle of anti-cavitation of the distribution pair of the fuel piston pump is theoretically analyzed,and the fluid domain dynamic model of the fuel piston pump is established by using PumpLinx software,and the factors affecting the cavitation of the distribution pair under the rated working conditions are simulated and analyzed.The results show that with the decrease of the inlet pressure,the increase of the rotational speed and the increase of the temperature,the cavitation is aggravated;the increase of the width angle of the triangular groove of the valve damping groove can effectively suppress cavitation.When the width angle of the triangular groove reaches 90°,the cavitation at the triangular groove almost disappears.According to the simulation results,the anti-cavitation measures are given:the inlet pressure is increased from 0.2 MPa to 0.3 MPa,and the width angle of the triangular groove is optimized from 75°to 90°.The simulation and experimental verification prove the correctness of the anti-cavitation measures,and the results provide an effective method to solve the cavitation of distribution pair.
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