摘要
为了研究橡胶泊松比对等壁厚单螺杆泵举升能力的影响,对其进行了有限元模拟和试验研究。首先,采用Workbench软件对等壁厚单螺杆泵进行了接触非线性仿真,研究了不同容腔压强下的压差载荷与其接触应力的关系,总结出了容腔间临界密封压力的计算方法,计算得到了不同橡胶泊松比下等壁厚单螺杆泵的临界密封压力,并使用Origin软件对其进行了多项式拟合;然后,分析了橡胶泊松比与容腔间临界密封压力的关系,根据等壁厚单螺杆泵内部油压传导规律,计算得到了不同橡胶泊松比下的螺杆泵扬程,并分析了两者间的关系;最后,为了验证等壁厚单螺杆泵接触非线性仿真结果的正确性,对该螺杆泵进行了水力特性试验。研究结果表明:容腔间接触应力随压差载荷的增大而近似呈线性增大,随容腔压强的增大而减小;容腔间的临界密封压力随容腔压强的增大而近似呈非线性减小;在容腔压强一定时,容腔间的临界密封压力随橡胶泊松比的增大而增大,泊松比越大其等壁厚单螺杆泵内部就越不易漏失;螺杆泵的扬程随橡胶泊松比的增大而呈非线性增大,且增长的速率越来越快;试验中,等壁厚螺杆泵所能达到的最大扬程为10.85 MPa,仿真结果与试验结果误差仅为3.2%。以上研究结果可为等壁厚单螺杆泵未来的研究提供借鉴参考。
In order to study the effect of rubber Poisson s ratio on the lifting capacity of single screw pump with constant wall thickness,finite element simulation and experimental study were carried out.Firstly,the Workbench software was used to simulate the contact nonlinearity of the constant wall thickness single screw pump,and the relationship between the differential pressure load and the contact stress under different cavity pressures was studied.The calculation method of the critical sealing pressure between the cavities was summarized,the critical sealing pressure of the constant wall thickness single screw pump under different rubber Poisson s ratio was calculated,and the polynomial fitting was carried out by using Origin software.Then,the relationship between the rubber Poisson s ratio and the critical sealing pressure between the cavities was analyzed.According to the internal oil pressure transmission law of single screw pump with equal wall thickness,the pump head under different rubber Poisson s ratio was calculated,and the relationship between them was analyzed.Finally,in order to verify the correctness of the contact nonlinear simulation results of the single screw pump with equal wall thickness,the hydraulic characteristics of the screw pump were tested.The research results show that the contact stress between the cavities increases linearly with the increase of pressure difference load,and decreases with the increase of cavity pressure.The critical seal pressure between the cavities is approximately non-linear with the increase of the cavity pressure.When the pressure of the cavity is constant,the critical seal pressure between the cavities increases with the increase of the Poisson s ratio of rubber.The greater the Poisson s ratio,the less likely it is to leak inside the same wall thickness single screw pump.The head of screw pump increases nonlinearly with the increase of rubber Poisson s ratio,and the growth rate is faster and faster.In the test,the maximum head of screw pump with equal wall thicknes
作者
毛方
童华仁
MAO Fang;TONG Huaren(Faculty of Mechanical and Electrical Engineering,Quzhou Vocational and Technical College,Quzhou 324000,China;School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《机电工程》
CAS
北大核心
2024年第12期2292-2299,共8页
Journal of Mechanical & Electrical Engineering
基金
浙江省教育厅一般科研基金资助项目(Y202352754)。
关键词
容积泵
螺杆泵水力特性
临界密封压力
橡胶泊松比
扬程
油液传导规律
密封特性分析
positive displacement pump
hydraulic characteristics of screw pump
critical sealing pressure
Poisson s ratio for rubber
head lift
oil conduction law
seal characteristic analysis