基于SolidWorks的四连杆抽油机结构优化

SolidWorks-based Finite Element Structural Optimization of Four-bar Pumping Unit

基座和驱动臂是四连杆抽油机最危险的2个部分,其设计水平的高低对整机的作业性能至关重要。为此,应用SolidWorks软件建立基座和驱动臂的实体模型,并对驱动臂结构进行优化设计,用Simulation对优化后的驱动臂进行静态动力学分析。分析结果表明,优化后的驱动臂应力分布比优化前均匀,最大应力出现位置由销孔2侧壁边缘朝悬点销孔方向下移,为148.32MPa,在驱动臂材料屈服强度范围内;安全系数从2.16降到1.58,整体体积减小1.35×108mm3,质量减轻1 058 kg,因而降低了生产成本,提高了经济效益。

The base and driving arm are the most dangerous parts of four-bar pumping unit. Their design level is most crucial to the operating performance of the whole machine. Therefore, the SolidWorks software was applied to establish the solid model of the base and driving arm. The design of the driving arm structure was optimized. The Simulation software was used to conduct a static dynamic analysis of the optimized arm. The analysis shows that the stress distribution of the optimized arm is more even than that of the arm without optimization. The position of the maximum stress moves downward from the side wall edge of pinhole 2 to the polished rod pinhole direction. The stress is 148.32 MPa which falls within the scope of the arm material yield strength. The safety coefficient falls from to 2. 16 to 1.58. The overall size decreases by 1.35 ×10^8mm^3 ; the mass decreases by 1 058 kg. Therefore, the production cost was reduced and the economic benefits were improved.