基于ANSYS的泥浆泵曲轴连杆机构运动特性仿真分析

Analysis of Kinematic Characteristics of Crank Shaft and Connecting Rod Mechanism for Mud Pump Based on ANSYS

基于多体动力学和有限元分析,通过ANSYS对泥浆泵五缸往复式动力机构进行了刚柔耦合分析,研究了泥浆泵运转过程中动力端的应力分布与变化。研究发现,泥浆泵五缸往复式机构的最大应力位于连杆处,且不断在受拉和受压状态间变换,处于循环交变载荷的状态下易引起疲劳失效,从而确定连杆为影响泥浆泵动力端寿命、稳定性的关键组件。为深入分析连杆的受力形式和状态,进行了曲轴连杆机构的动力学分析,结果表明:连杆最大应力出现在上死点,低于连杆材料结构钢的屈服应力,连杆与曲轴联接处作用力周期性的变化暗示了连杆的受力状态从受压向受拉状态转变。

Based on multi-body dynamics and finite element analysis,conducted a rigid-flexible coupling analysis on the five-cylinder reciprocating power mechanism of a mud pump through ANSYS,and studied the stress distribution and change of the power end during the operation of the mud pump.The study found that the maximum stress of the five-cylinder reciprocating mechanism of the mud pump is located at the connecting rod,and it is constantly changing between tension and compression.Under the condition of cyclic alternating load,it is easy to cause fatigue failure,so the connecting rod is determined as a key component affecting the life and stability of the mud pump power end.In order to deeply analyze the force form and state of the connecting rod,the dynamic analysis of the crankshaft and connecting rod mechanism was carried out.The results show that the maximum stress of the connecting rod appears at the top dead point,which is lower than the yield stress of the connecting rod material structural steel.The periodic change of the force at the connection between the rod and the crankshaft implies that the force state of the connecting rod changes from being compressed to being tensioned.