Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an 710072, China.
School of Mechanical-Electric Engineering, Xidian University, Xi'an 710071, China.
Chaos. 2022 Dec;32(12):123111. doi: 10.1063/5.0125258.
This paper clarifies the mechanism of the dynamic characteristics of the water-lubricated bearing-rotor coupling system at different operating stages. Dynamic models of the water-lubricated bearing-rotor system under fluid lubrication are developed. The influences of different operating modules on the dynamic characteristics are investigated. The effects of different speeds, different loads, and different impacts are analyzed. The time domain responses, axis orbits, and phase diagram are gained. Velocity has impacts on the vibration performance of the shaft. The external load has slight effects on the vibration characteristics. Different forms of transient impacts have different effects on the vibration characteristics. The validity of the new-built models is verified by experiments. Results provide theoretical foundations for the optimum design for such bearing-rotor systems.
本文阐明了不同运行阶段水润滑轴承-转子耦合系统动态特性的机理。建立了流体润滑下水润滑轴承-转子系统的动力学模型，研究了不同运行模块对动态特性的影响。分析了不同速度、不同载荷和不同冲击的影响。获得了时域响应、轴轨迹和相图。速度对轴的振动性能有影响。外载荷对振动特性的影响很小。不同形式的瞬态冲击对振动特性有不同的影响。通过实验验证了新建立的模型的有效性。研究结果为这类轴承-转子系统的优化设计提供了理论基础。
