往复泵运动机构磨损对振动特性的影响分析

往复泵运动机构磨损是影响其性能的主要因素,研究掌握运动机构磨损引起的振动特性,对设备故障诊断和状态监测具有重要意义。由于往复泵组成部件较多,结构复杂,仅依靠对振动数据进行分析的信号处理方法难以准确分析和判断设备性能。通过开展基于运动副磨损对振动特性影响的机理分析,建立曲柄连杆处运动副的接触-分离2种状态力学和数学模型,并利用数值计算方法,分析运动副不同磨损间隙状态下,运动机构运动学、动力学和振动特性,掌握磨损间隙对设备的振动性能的影响,发现磨损间隙的存在对舱底泵的运动特性和振动特性有较大影响。

Reciprocating bilge pump crank-link mechanism vibration analysis with joint clearance

The wear of reciprocating pump mechanism is the main factor affecting the performance of the reciprocating pump. It is important to study the vibration characteristics caused by the wear of the moving mechanism, which is veryim-portant for the fault diagnosis and condition monitoring of the equipment. As the components of the reciprocating pump more complex structure, only rely on vibration data analysis of signal processing methods is difficult to accurately analyze and determine the performance of equipment. Based on the mechanism analysis of the effect of the wear of the moving pair on the vibration characteristics, the contact state and the separation state model of the moving pair at the crank connecting rod were established, and the numerical calculation method was used to analyze the effect of the wear condition.Thekin-ematics, dynamics and vibration characteristics of the bilge pump are analyzed. The influence of the wear clearance on the vibration performance of the bilge pump is analyzed. It is found that the existence of the wear gap has a great influence on the bilge pump 's motion characteristics and vibration characteristics.