Solution for the torsional vibration of the compressor shaft system with flexible coupling based on a sensitivity study

Feng, Jianmei; Zhao, Yiyi; Jia, Xiaohan; Peng, Xueyuan

doi:10.1177/0954408918811014

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…Common methods for reducing crankshaft torsional vibration include installing a damper, [25][26][27] adjusting external excitation, 28 modifying the inertia mass, 29,30 and dividing the restricted speed range. Scholars have also optimized the shaft system structure using frequency adjustment methods.…”

Section: Corresponding Authormentioning

confidence: 99%

Analysis of rigid-flexible coupled torsional vibration and vibration suppression of crankshaft system under multiple working conditions

Wang,

Huang,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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With the rapid development of shale gas resources in China, there is an increasing demand for large and multiple column compressors. However, this development has brought to light the issue of torsional vibration in compressor crankshaft systems, particularly under variable loads and multiple working conditions. In order to reduce the torsional vibration of the compressor crankshaft and ensure the safe and stable operation of the compressor unit, this study proposes a method for calculating and suppressing torsional vibration in the crankshaft system of a shale gas compressor, which takes into account the flexibility effect of various parts and considers multiple working conditions. The analysis focused on the rigid-flexible coupling torsional vibration characteristics of the crankshaft system under multiple working conditions, considering the flexible deformation of the main bearing, connecting rod, and crankshaft. The study successfully determined the torsional vibration response of the crankshaft system under seven typical working conditions. Furthermore, for the worst conditions, a detailed analysis of the vibration response of the crankshaft system was conducted and carried out a study on suppressing crankshaft torsional vibration through response surface optimization design. The study findings indicate that the compressor system exhibits low-frequency vibrations during operation. The maximum torsional angular deformation at the crank pin of the fourth column is measured to be 0.052°. Following structural optimization, the relative torsional angular deformation of the crank pin is reduced by 25.61% under the worst operating conditions. Moreover, the peak angular velocity of the center of mass is reduced by 22.17%. These results demonstrate a significant suppression effect on torsional vibrations in the compressor crankshaft system, leading to improved working safety.

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Section: Corresponding Authormentioning

confidence: 99%

Analysis of rigid-flexible coupled torsional vibration and vibration suppression of crankshaft system under multiple working conditions

Wang,

Huang,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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show abstract

“…The lumped-mass model ignores the shape of the shaft system and discretizes the shaft system into a spring-mass model to obtain the torsional natural frequency and vibration pattern of the shaft system. 1–3 The continuous model treats the mass of the shaft system as continuously distributed along the axis and retains the basic shape of the shaft system, so the calculation accuracy of the natural frequency is higher compared with the concentrated mass model, 4–5 but the solution process of the continuity model is complicated, so some scholars have applied finite element software to solve the natural frequency of the shaft system. 6,7 Similarly, scholars have studied the response law of the shaft system under external excitation.…”

Section: Introductionmentioning

confidence: 99%

“…However, the compressor shaft system involved in this paper has limited installation space and cannot be installed with torsional vibration dampers, so the frequency adjustment method can only be used to improve the vibration characteristics of the shaft system. Feng 1 and Drab and Engl 4 performed sensitivity analyses and targeted adjustments of the rotational inertia and torsional stiffness in the spring-mass model of the shaft system to change its natural frequency, thereby reducing the torsional angle of the shaft system. However, the method has two drawbacks: (1) it cannot be directly linked to the structural parameters of the shaft system to provide guidance for engineering practice; (2) the functional relationship between the input parameters and the output parameters is not established leading to the impossibility of using mathematical methods for the optimization search study.…”

Section: Introductionmentioning

confidence: 99%

Torsional vibration response characteristics and structural optimization of shale gas compressor shaft system

Chen

Nie

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Due to the complexity of shale gas development formations, high-speed reciprocating compressors must be able to operate in harsh pressurization conditions, such as multiwall operation conditions and changing well conditions, resulting in high shaft system impact loads and poor cooperative matching of the rotation speed, which can easily cause shaft system torsional vibration and significantly reduce the performance and operational safety of shale gas compressors. The vibration test results of the shaft system at the Weiyuan site show that there were 3rd- and 7th-order torsional vibration phenomena in the shaft system. For this reason, in this study, the shaft system of a shale gas compressor at the Weiyuan site was used as the research object, a dynamic model of the shaft system under full-cycle alternating loads was established, and the correctness of the model was verified by the shaft system field vibration test Finally, an optimization study of the shaft system structure based on the response surface method was conducted, and the results show that the optimized shaft system increased the 1st-order natural frequency by 4.5% and reduced the peak velocity of the coupling in the vertical direction by 27.7%, improving the service life and operating reliability of the shaft system.

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“…Initially, the torsional vibration mechanics model only considered the influence of linear factors of the shaft system. For example, Feng et al [2] solved the natural frequency of the shaft system based on the eigenvector method and avoided the torsional vibration of the shaft system by adding additional masses. Liu et al [3] solved the torsional vibration response of the shaft system based on the MSM method and modified the structural parameters of the shaft system based on the SA method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influence of piston–cylinder friction on the torsional vibration characteristics of compressor crankshaft system

Chen

Zhang

et al. 2022

Nonlinear Dyn

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：With the development of compressors towards high speed and multiple columns, the torsional vibration phenomenon has become a major factor affecting the service life and reliability of the shaft system. Therefore, this paper considers the influence of friction between piston and cylinder on the instantaneous inertia of the crank connecting rod mechanism, establishes a nonlinear torsional vibration mechanics model of shale gas compressor shaft system, solves the natural frequency of the shaft system under undamped and damped conditions using the eigenvector method, and investigates the influence of the friction coefficient between piston and cylinder and the operating speed on the torsional vibration response of the shaft system under the self-excitation of the shaft system and the action of and excitation moment by the Runge-Kutta methods.The results show that after considering the friction between the piston and the cylinder, the 2 nd order natural frequency of the shaft system shows a "high-low-high" fluctuation pattern; As the friction coefficient increases, the amplitude of the shaft system and the peak vibration speed show a rising trend; Meanwhile, when the speed increases, the vibration of the shaft system changes from chaotic \ period to the proposed periodic state, but the amplitude shows a decreasing trend. The research in this paper aims to improve the theory of nonlinear dynamics of compressor shaft systems, and the determined nonlinear parameters can be used to guide the operation and maintenance of compressors in engineering.

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Solution for the torsional vibration of the compressor shaft system with flexible coupling based on a sensitivity study

Cited by 7 publications

References 14 publications

Analysis of rigid-flexible coupled torsional vibration and vibration suppression of crankshaft system under multiple working conditions

Analysis of rigid-flexible coupled torsional vibration and vibration suppression of crankshaft system under multiple working conditions

Torsional vibration response characteristics and structural optimization of shale gas compressor shaft system

Analysis of the influence of piston–cylinder friction on the torsional vibration characteristics of compressor crankshaft system

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