Abstract
To satisfy the requirements of high speed, large capacity and constant winding, a textile winding rotor needs to work in a wide rotation speed range and frequently pass through critical speed points. Thus, the winding rotor adopts the flexible long shaft coupling structure and flexible support with rubber O-rings. This kind of rotor has a multi-coupling structure and frequency-dependent parameters characteristics, especially representative and universal in the dynamic analysis method of the high-speed rotor. In this paper, an approach was proposed to investigate the dynamic behavior of the winding rotor considering the flexible coupling and frequency-dependent supporting parameters. Firstly, a dynamic model of the winding rotor was established by using a Timoshenko beam element. Its dynamic behaviors were simulated by considering the time-varying rotation speed and the frequency-dependent parameters of flexible support. Secondly, a non-contact measuring device was developed for measuring the vibration displacement of the winding rotor in three different speed-up times. Finally, based on simulation and measurement data, how flexible support parameters and the speed-up time affect the winding rotor passing through the critical speed point of the rotor smoothly is revealed. The methods and findings reported here can be used for theoretical and experimental vibration analysis of other types of high-speed flexible rotors.
Highlights
Obtaining the critical speed points and unbalanced response characteristics of the rotor system is a necessary requirement for the reasonable design of rotor structural parameters and process parameters, thereby ensuring that the rotor can smoothly pass through the critical speed point and work stably in a wide operating speed range
In order to understand the performance of the rubber ring, Kazimierski and Jarzecki [12] studied its dynamic characteristics through theoretical and experimental methods, and the results show that an external pressure gas bearing system that was elastically supported by rubber O-rings can increase the stability threshold of the rotor system
This paper aimed to investigate the dynamic characteristics of the winding rotor during its speeding up
Summary
Obtaining the critical speed points and unbalanced response characteristics of the rotor system is a necessary requirement for the reasonable design of rotor structural parameters and process parameters, thereby ensuring that the rotor can smoothly pass through the critical speed point and work stably in a wide operating speed range. This is one of the key aspects of modern rotor dynamics application research
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