Research on Sealing Performance of Pipe Joints in High Pressure Fuel Systems
In order to study the influencing factors of the sealing performance of fuel system fuel pipe joints,a finite element model of high-pressure fuel pipe joint sealing is established with the help of Hypermesh and ANSYS software taking a diesel engine high-pressure fuel pipe joint as the research object.According to Hertzian contact theory and von Mises stress calculation,the variation law of sealing band width and maximum equivalent plastic strain of high-pressure fuel pipe joint under different preload and different oil supply pressure is explored.The results show that the sealing band width and maximum equivalent plastic strain are positively correlated with the preload,and the maximum equivalent plastic strain has a cubic relationship with the change of preload.The sealing band width is negatively correlated with the oil supply pressure,while the oil supply pressure has no significant effect on the equivalent plastic strain,and the research results can provide theoretical support for the installation design of high-pressure fuel pipe joints and the selection of pipe joint preload.
high-pressure fuel systemfuel pipe jointsealing band widthequivalent plastic strainpreload
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