五对置柱塞泵曲轴的多工况分析及优化  

Multi-condition analysis and optimization of crankshaft of five-opposed plunger pump

作　　者：伊祖瑶 魏修亭[1] 李智钦 于跃龙 王文迎 马泽 YI Zuyao;WEI Xiuting;LI Zhiqin;YU Yuelong;WANG Wenying;MA Ze(School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000

出　　处：《机电工程》2024年第9期1656-1665,共10页Journal of Mechanical & Electrical Engineering

基　　金：山东省科技型中小企业创新能力提升工程项目(2022TSGC2261)。

摘　　要：针对五对置柱塞泵曲轴在实际工况下存在的失效、共振问题,以五对置柱塞泵曲轴为例,采用理论分析和有限元分析的方法,对曲轴进行了仿真分析、结构优化和强度校核。首先,采用了ANSYS有限元分析法,研究了5DW150/16对置式柱塞泵曲轴多工况下的应力应变云图与模态响应云图,分析了曲轴不同工况下的危险截面和共振问题;然后,采用了支撑结构优化与响应面法优化两种优化方法,研究了支撑方式与结构参数对曲轴应力应变的影响;最后,采用了理论公式强度校核方法,对优化前后的曲轴是否满足设计要求进行了验证。研究结果表明:五拐两支撑结构曲轴的危险截面出现在曲柄销的过渡圆角处,不会出现共振现象;采用全支撑结构增强了曲轴的抗冲击能力,降低了曲轴的颤动,提高了整体载荷能力,保证了泵的平稳运行;采用响应面法优化后的曲轴,最大等效应力减小了15.8%,最大变形量减小了14.04%;优化前后的曲轴可以满足强度要求。Aiming at the failure and resonance of crankshaft under actual working conditions,taking the crankshaft of five-opposed plunger pump as an example,the theoretical analysis,simulation analysis,structural optimization and strength check of crankshaft under multiple working conditions were studied.Firstly,the ANSYS finite element analysis method was used to study the stress-strain nephogram and modal response nephogram of the crankshaft of 5DW150/16 opposed plunger pump under multiple working conditions,and the dangerous section and resonance problem of the crankshaft under different working conditions were analyzed.Then,the support structure optimization and response surface method optimization was used to study the influence of support mode and structural parameters on the stress and strain of crankshaft.Finally,the theoretical formula strength check was used to study whether the crankshaft before and after optimization meets the design requirements.The research results show that the dangerous section of the crankshaft of the five-throw two-support structure appears at the transition fillet of the crank pin,and there is no resonance phenomenon.The full support structure can enhance the impact resistance of the crankshaft,reduce the vibration of the crankshaft,improve the overall load capacity,and ensure the smooth operation of the pump.The maximum equivalent stress of the crankshaft optimized by the response surface method is reduced by 15.8%,and the maximum deformation is reduced by 14.04%.The crankshaft before and after optimization meets the strength requirements.

关 键 词：五对置柱塞泵 曲轴 最大等效应力 模态分析 支撑结构 响应面法分析 疲劳强度校核 

分 类 号：TH322[机械工程—机械制造及自动化]