【摘要】 应用流体动力学和有限元法建立了螺杆泵的橡胶衬套和转子的接触模型,并进行数值模拟。分析了过盈量、橡胶材料硬度和泊松比对螺杆密封性能的影响,并对等壁厚螺杆泵和常规螺杆泵进行对比。结果表明:非理想的橡胶材料是可压缩的,在一定的内压力下会被压缩而产生漏失;过盈量越大、橡胶材料硬度越高和泊松比越大,螺杆泵的密封性能越好;相同条件下,常规螺杆泵的最大接触压力曲线下降的更快,而接触压力越小,密封性能越低,这说明等壁厚螺杆泵密封性能比常规螺杆泵要好。更多还原

【Abstract】 Using the fluid dynamics and finite element method,numerical simulation of screw pump(SP) was made and a contact model of rubber and rotor was established,then the effects of interference,rubber material hardness and Poisson’s ratio for SP were discussed,and uniform thickness SP and conventional SP were contrasted.Results showed that the nonideal rubber is compressible;it can be compressed under certain pressure and result in slippage.The higher of interference rubber’s hardness and Poisson’s ratio,the better of the seal performance.The maximum contact pressure of conventional SP decreased faster than that of uniform-thickness SP under the same conditions,and the smaller of contact pressure,the lower of the seal performance,so it means that the sealing performance of uniform-thickness SP was better than that for conventional SP.更多还原