五缸往复泵曲轴的柔体动力学分析  

Flexible body dynamics of five-cylinder reciprocating pump crankshaft

作　　者：陈礼 符义红 陈红军 管汝光 徐小东 CHEN Li;FU Yihong;CHEN Hongjun;GUAN Ruguang;XU Xiaodong(Chongqing Pump Industry Co.Ltd.,Chongqing 400033,China)

机构地区：[1]重庆水泵厂有限责任公司,重庆400033

出　　处：《排灌机械工程学报》2020年第8期770-774,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：重庆市经信委新产品(技术)研发及产业化项目(2017-01-148)。

摘　　要：针对曲轴作为往复泵的关键运动部件和受力部件,由多段偏心轴组成,存在结构突变等易使应力集中的结构,加之受弯扭组合应力,存在准确计算困难的问题.以某型五缸往复泵的曲轴计算为例,利用ADAMS软件对曲轴系统进行柔体动力学计算,得到曲轴在4个周期内的运动规律和受力情况.结果显示,在曲轴5个曲拐的倒角处应力较大,同时找出准确的极值应力点和对应的位置,曲拐2左侧倒角应力为最大值93.23 MPa,出现在216°,576°,936°和1296°这4个角度位置点,呈周期性出现.同时,利用静力学对柔体动力学计算结果进行验证,静力学计算最大应力值为92.46 MPa,偏差0.8%,并且计算结果与曲轴实际工作情况基本一致,为曲轴设计和进一步优化提供了参考,对工程设计具有一定的指导意义.The crankshaft is the key moving part and stressed part of the reciprocating pump.It is composed of multiple eccentric shafts,which is not conducive to avoid stress concentration due to structural mutation.Because the crankshaft bears the combined bending and torsion stress,it is very difficult to calculate accurately.Taking the crankshaft calculation of a five-cylinder reciprocating pump as research object,ADAMS software was used to calculate the flexible body dynamics of the crankshaft system,and the motion law and stress situation of the crankshaft in four cycles were obtained.The results show that the chamfer stress of the five cranks is large,and the accurate extreme stress point and corresponding position are found out.The maximum value of the chamfer stress on the left side of crank 2 is 93.23 MPa,which appears periodically at the four angular positions of 216°,575°,936°and 1296°.The results are verified by static calculation.The maximum stress value of static calculation is 92.46 MPa,with a deviation of 0.8%.The calculation results are basically consistent with the actual work of the crankshaft,which provides a reference for the design and further optimization of the crankshaft,and is of certain guiding significance to engineering design.

关 键 词：曲轴 五缸 柔体动力学 静力学计算 ADAMS软件 

分 类 号：TH38[机械工程—机械制造及自动化] S277.9[农业科学—农业水土工程]