【摘要】 旋转机械是机械设备的重要组成部分，不对中的转子系统是导致机器设备出现故障的一个关键因素。如果在运转过程中出现不对中的故障，可能会对机械设备的稳定运行带来各种不利效果，例如引起转子和定子间的动静碰摩、轴承的摩擦损伤、轴的弯曲变形、油膜震荡、振动等，这些都可能严重干扰机械设备的稳定运行。对转子系统的不对中故障产生的机制与振动特征进行研究，对于准确地判断和掌握转子系统的运行状况显得尤为关键。针对水轮发电机组转子系统平行不对中故障和发电机转子系统转定间碰摩耦合故障，基于非线性转子动力理论和平行不对中故障的运动机理，构建了一个水轮发电机组转子系统的非线性动力学模型，该模型考虑了平行不对中和碰摩耦合故障的影响；探讨了发电机转子系统在机组转速、偏心量以及平行不对中量等多个参数变动下的非线性动力学表现。更多还原

【Abstract】 Rotating machinery is an important component of mechanical equipment, and misaligned rotor systems are a key factor leading to equipment failures. If there is a misalignment fault during operation, it may have various adverse effects on the stable operation of mechanical equipment, such as causing dynamic and static friction between the rotor and stator, bearing friction damage, shaft bending deformation, oil film oscillation, vibration, etc., all of which may seriously interfere with the stable operation of mechanical equipment. Studying the mechanism and vibration characteristics of misalignment faults in rotor systems is particularly crucial for accurately judging and mastering the operating conditions of the rotor system. This article focuses on the parallel misalignment fault of the rotor system of a hydroelectric generator set and the collision friction coupling fault between the rotor system of the generator set. Based on nonlinear rotor dynamics theory and the motion mechanism of parallel misalignment faults, a nonlinear dynamic model of the rotor system of a hydroelectric generator set is constructed, which considers the influence of parallel misalignment and collision friction coupling faults. The model explores the nonlinear dynamic performance of the generator rotor system under multiple parameter changes such as unit speed, eccentricity, and parallel misalignment.更多还原