论文部分内容阅读
以变螺距螺杆真空泵转子为研究对象,建立主动转子的三维有限元分析模型,对转子在热载荷作用下的温度场和热变形进行有限元分析。计算得到每一级的当量温度和对流换热系数,确定变螺距转子热边界条件,对螺杆转子的温度场分布进行模拟分析,得出转子的温度分布规律,并进一步对转子的热变形进行研究。研究结果表明:变螺距转子温度场和热变形分布均匀,最高温度为146.97℃,最低温度为68.30℃,轴向形变量最大值为0.41168 mm,径向形变量最大值为0.17245mm,为变螺距螺杆真空泵的设计提供了理论依据。
Taking the variable-pitch screw vacuum pump rotor as the research object, a three-dimensional finite element model of the active rotor was established to analyze the rotor’s temperature field and thermal deformation under the heat load. The equivalent temperature and convection heat transfer coefficient of each stage were calculated. The thermal boundary conditions of the variable pitch rotor were determined. The temperature distribution of the rotor was simulated and the rotor thermal deformation was further studied . The results show that the temperature field and the thermal deformation of the variable pitch rotor are evenly distributed with the maximum temperature of 146.97 ℃ and the minimum temperature of 68.30 ℃. The maximum axial deformation is 0.41168 mm and the maximum radial deformation is 0.17245 mm, Screw vacuum pump design provides a theoretical basis.