Reliability And Durability Analysis Of Key Components Of Oil And Gas Springs

Oil and gas springs are an important mechanism in the suspension system of armored vehicles,and are widely used today in the light weight requirements of new generation weapons and equipment because of their compact structure,low weight,and non-linear damping.The reliability and durability of the essential components of oil and gas springs,such as seals and damping valves,is of utmost importance,as their damage during the use of armored vehicles often results in the system’s overall performance and life not meeting the requirements.This paper will analyze the failure modes of oil and gas springs,elucidating the causes of such the failure of key components in combination with related theories,and study the factors influencing the reliability and durability of oil and gas springs with the help of simulation software to provide important references for the subsequent optimization of oil and gas spring design.The main research contents of this paper are as follows:(1)The FMEA method is employed to evaluate the breakdown of a certain oil and gas spring,based on its structural features and operational principles.The sealing and vibration dampening valve are the primary elements of the oil and gas spring’s breakdown.An oil and gas spring resistance characteristic analysis model is established,and the simulation model and test results are compared and verified.(2)ANSYS software simulation analysis confirms that the outer ring,inner ring,and fixed block of vulnerable parts of an oil and gas spring seal meet the design requirements for reliability and durability,based on the technical index’s maximum stress and maximum deformation under working conditions as the boundary conditions of strength and stiffness.(3)We analyze the oil flow rate,pressure and pressure field distribution law of components under five distinct frequency simple harmonic vibration loading conditions,based on the technical index of a certain oil and gas spring vibration damper valve.We then determine the performance parameters of the seat and spool of the vibration damper valve as the primary determinants of its reliability and durability through the analysis of the simulation results of the ANSYS software fluid-solid coupling.(4)In-depth analysis of the vibration,stress,static strength calibration and other important parameters of the valve seat and spool under different operating conditions and combined with the theory of stress-life method,its low-order inherent frequency of 91.72 Hz to exclude the influence of resonance,reveal the distribution of vibration dampening valve vulnerable areas,the safety factor and fatigue life and other analysis results,the safety factor of the spool stem is very low and below 2 and the actual life of 20848,fatigue clarifies the spool stem The fatigue clarifies that the easy fatigue failure of the spool stem will have an important impact on the reliability and durability of the vibration dampening valve.