摘要
连杆是柴油机中重要的传动件,它将活塞的往复运动转变为曲轴的旋转运动,并将活塞承受的力传递给曲轴,曲轴把活塞和连杆传来的气体力转变成转矩输出。连杆工作时承受三方面的力:活塞顶上的气体力,活塞组和连杆小头的往复惯性力以及连杆本身绕活塞销作变速摆动时的横向惯性力。由于上述力的大小和方向都以工作循环为周期发生变化,所以对连杆的刚度和疲劳强度都要求较高。因此对连杆进行有限元分析,了解连杆的变形和应力分布情况,对改进连杆设计,提高其可靠性具有十分重要的意义。
Connecting rod is an important transmission component of diesel engine. It transforms reciprocating motion of the piston into rotary motion of the crankshaft and transforms the force of piston to the crankshaft, while the crankshaft converts the gas force of the piston and connecting rod into torque output. The connecting rod withstands three forces when it works： the gas force from the top of the piston, the reciprocating inertia force from the piston group and small end of the connecting rod and horizontal inertia force from the connecting rod when around the piston pin for variable speed swing. Since the size and direction of these forces changes regularly on duty cycle, it has higher requirement for the stiffness and fatigue strength of the connecting rod. Therefore, the finite element analysis of connecting rod is significant, which shows the deformation and stress distribution of the connecting rod. It is meaningful for improving design and reliability of the connecting rod.
出处
《农业装备与车辆工程》
2012年第8期67-70,共4页
Agricultural Equipment & Vehicle Engineering
关键词
连杆
受力分析
有限元计算
connecting rod
stress analysis
finite element analysis
