Optimal Design Of Electromagnetic Mechanism For High Temperature Aviation Valve

At present,the demand for aviation solenoid valves is increasing rapidly on domestic and overseas.At the same time,the performance requirements for aviation solenoid valves working in the conditions with high temperature are gradually increasing.The key component of aviation solenoid valves is the solenoid mechanism for aviation valve,its temperature characteristics directly affect the stability and reliability of aviation solenoid valves.Therefore,it is of great significance to study the performance and optimal design of electromagnetic mechanisms for aviation valves in high temperature environments.The research object of this thesis is the electromagnetic mechanism for high-temperature aviation valve(EM for HTAV),which works in the condition about 200℃,and its maximum temperature should not be higher than 250℃.According to the special design requirements of EM for HTAV,the following works are implemented:Firstly,the structural parameters of the EM for HTAV are calculated,and its twodimensional static magnetic field model is established by finite element software.Based on the method of parametric modeling,the influence of the magnetic isolation ring parameters,guide sleeve parameters and moving iron core structure parameters of the EM for HTAV on its static characteristics are comprehensive investigated.Then,a three-dimensional transient field model of the EM for HTAV is established to analyze its dynamic characteristics during its pull-in process.Secondly,considering the influence of thermal effect of the high temperature environment on the loss of the EM for HTAV,the electromagnetic-thermal coupling simulation and the temperature distribution are performed and obtained.From the perspectives for “reducing coil’s temperature rise” and “increasing the thermal dissipation area” of the EM for HTAV,the thermal dissipation structures are optimized.In terms of increasing the thermal dissipation area,two optimization goals are set,one is to minimize the volume,and the other is to ensure the maximum temperature is not higher than 250°C.Fin structures for increasing thermal dissipation ability of the EM for HTAV are designed,and the key parameters are optimized based on the orthogonal experiment method.Finally,a prototype of the EM for HTAV is manufactured based on the theoretical analysis,simulation research and optimization design.And the temperature rise experiment is carried out.The rationality of the heat dissipation optimization design of the EM for HTAV and the effectiveness of the electromagnetic-thermal coupling method for solving temperature field are verified.This thesis provides a reference for the design and research of the EM for HTAV working in special environmental,and has the engineering application value and guiding significance.