Investigation on a No Trial Weight Spray Online Dynamic Balancer

Yun, Xialun; Mei, Xuesong; Jiang, Gedong; Hu, Zhenbang; Zhang, Zunhao

doi:10.1155/2018/7021215

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…The unbalanced distribution of the wind turbine can be obtained from the vibration data, and then the rotor balance can be completed. Yun et al [29] have established a rotor system dynamics model to analyze the relationship between unbalance and vibration response and then obtained the relationship between the structural parameters of the rotor system and the influence coefficient, based on this model, a liquid-jet online dynamic balancing machine was developed. Deepthikumar et al [30] have replaced the transfer matrix with the influence coefficient matrix to achieve the dynamic balance of the flexible rotor.…”

Section: Introductionmentioning

confidence: 99%

Research on dynamic balance optimization method of flexible rotor based on GWO

Zhang,

Li,

Han

et al. 2024

Meas. Sci. Technol.

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Aiming at the problem that the dynamic balance process of a flexible rotor needs to start and stop frequently to add test weight, which is time-consuming and labor-consuming, and the balance accuracy is difficult to guarantee, a dynamic balance optimization method of flexible rotor based on Grey Wolf Optimizer(GWO) is proposed. In this paper, a virtual prototype model is established based on a power turbine rotor for a certain type of turboshaft engine, and a rotor test platform is built. The transfer function is used to find the relationship between unbalance and vibration response, and the equilibrium equations are established to solve the problem. In the process of solving the problem that the equilibrium equations are mostly contradictory, GWO is used to solve the contradictory equations to obtain the optimal counterweight scheme at the full working speed of the rotor. The results show that the method proposed in this paper eliminates the tedious test weight process of traditional dynamic balance, and the vibration reduction effect is better than the conventional on-site dynamic balance. The work of this paper can improve the efficiency and accuracy of flexible rotor dynamic balance and provide technical reference for the vibration control of aero-engine.

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Section: Introductionmentioning

confidence: 99%

Research on dynamic balance optimization method of flexible rotor based on GWO

Zhang,

Li,

Han

et al. 2024

Meas. Sci. Technol.

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“…The focus of many modern balancing methods is to substitute measurements with simulations. Recent examples of model-based balancing techniques were proposed by Yun et al [15], Carvalho et al [16] and Nordmann et al [17,18]. This paper investigates the application of a model-based modal balancing technique for warped rotors utilising the Numerical Assembly Technique (NAT).…”

Section: Introductionmentioning

confidence: 99%

Modal Balancing of Warped Rotors without Trial Runs Using the Numerical Assembly Technique

Quinz,

Überwimmer,

Klanner

et al. 2023

Machines

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The increasing use of high-speed machinery leads to a growing demand for efficient balancing methods for flexible rotors. Conventional balancing methods are costly and time-consuming since they require multiple trial runs. For this reason, recent research focuses on model-based balancing methods, which substitute measurements with simulations. This work presents and examines a model-based modal balancing method, which utilizes the Numerical Assembly Technique (NAT) for the in situ balancing of warped rotors with flexible behaviour. NAT is a successive modification of discrete–continuous modelling that leads to analytical harmonic solutions and is very computationally efficient. In this version of NAT, internal damping is also included with a viscoelastic material model using fractional time derivatives. The modal balancing procedure is adapted to handle measurements outside of the critical speeds and the effect of the pre-bend on the rotor. The accuracy of the simulations is shown by comparing measured mode shapes and eigenvalues with values calculated with NAT. Furthermore, the first two modes of a rotor test bed are successfully balanced without trial runs.

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