Performance analysis of high-stiffness bearing composited by hydrostatic cavities and tilting pads with preload

Chen, Runlin; Wang, Jianlei; Yuan, Xiao; Li, Longlong; Cui, Yahui

doi:10.1108/ilt-03-2017-0052

Cited by 6 publications

(8 citation statements)

References 10 publications

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“…In the free vibration of each single mode, each conjugate solution (w i q i and Ã i q Ã i ) satisfies equation (1), so equation (1) can be written as…”

Section: Direct Methodsmentioning

confidence: 99%

“…, and m ð1Þ , and m (1) are the first-order theoretical predicted values. The specific iterative process is as follows:…”

Section: Iterative Methodsmentioning

confidence: 99%

“…Substitute the first-order theoretical predicted values k ð1Þ 0 , k ð1Þ 1 , k ð1Þ 2 , c ð1Þ 0 , c ð1Þ 1 , c ð1Þ 2 , and m ð1Þ , and m (1) into equation (16), X(x, ) within the range of ¼ 0.001-1 can be obtained. Where, x is the value range of the frequency.…”

Section: Iterative Methodsmentioning

confidence: 99%

“…When R is minimum, j is acquired. The first-order predicted value of (1) is j . Unbalance F 0 of the rotor can be predicted.…”

Section: Iterative Methodsmentioning

confidence: 99%

“…The sliding bearings are widely used in the fields of energy, aerospace, shipping, automobile, and manufacturing. 1,2 The study of oil film dynamic characteristics of sliding bearing is an important part of bearing-rotor system dynamics and lubrication theory. At present, the main ways to study the oil film characteristics of sliding bearing are theoretical calculation and experimental testing.…”

Section: Introductionmentioning

confidence: 99%

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Identification method of dynamic characteristics coefficients of tilting pad bearing in critical speed range of large unit

Chen

Wang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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For tilting pad bearing of large unit, it is not easy to identify stiffness and damping coefficients in full-size unit test. Because of many limiting factors in large unit test, the stiffness and damping test methods are not fully applicable to large units, which can be easily implemented in laboratory. The nonexcitation methods are proposed in this paper to identify the stiffness and damping coefficients of tilting pad bearing in the critical speed range of large unit, including direct method and iterative method. Firstly, the rotor speed and vibration during the whole period are obtained. The vibration data of the first-order critical speed range in the startup stage are selected, and the stiffness and damping coefficients of tilting pad bearing are identified through the two methods. The results show that the stiffness and damping coefficients identified through the direct method are generally less than the theoretical values. The identification error of stiffness coefficient is within ±9%, and the identification accuracy of stiffness coefficient is significantly higher than that of damping coefficient. The damping coefficient identified by the iterative method agrees well with the theoretical value, and the identification error is about −3%. In conclusion, the stiffness and damping coefficients of tilting pad bearing in the range of first-order critical speed can be obtained by combining the two identification methods. These identification results are relatively reliable and can basically meet the analysis requirements of important vibration problems of bearing-rotor system.

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“…In the free vibration of each single mode, each conjugate solution (w i q i and Ã i q Ã i ) satisfies equation (1), so equation (1) can be written as…”

Section: Direct Methodsmentioning

confidence: 99%

“…, and m ð1Þ , and m (1) are the first-order theoretical predicted values. The specific iterative process is as follows:…”

Section: Iterative Methodsmentioning

confidence: 99%

Section: Iterative Methodsmentioning

confidence: 99%

“…When R is minimum, j is acquired. The first-order predicted value of (1) is j . Unbalance F 0 of the rotor can be predicted.…”

Section: Iterative Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Identification method of dynamic characteristics coefficients of tilting pad bearing in critical speed range of large unit

Chen

Wang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

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Study on the influence of thrust plate tilt on performance of distributed hybrid thrust bearing with tilting pad

Chen

Wang

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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A kind of distributed hybrid thrust bearing with tilting pad is proposed in this paper, and the influence of thrust plate tilt on bearing performance is analyzed. The film thickness equation is constructed, considering the machining error and installation error synthetically which are the main causes of thrust plate tilt. Substituting the film thickness equation to the classical calculation equation of thrust bearing, the time-varying stiffness of the bearing is obtained. The influence of tilt angle of thrust plate on time-varying stiffness of the bearing is analyzed through the case bearing, and the bearing performance is controlled by change pivot position of tilting pad which is represented by preload coefficient. The results show that the thrust plate tilt causes the fluctuation of the bearing stiffness during the rotation period, and this fluctuation is exacerbated as the increasing of the tilt angle. The bearing stiffness increases and the tilt angle range of the thrust plate decreases accordingly, because that the increasing of the preload coefficient of tilting pad makes the bearing unilateral gap decrease. However, the large preload coefficient exacerbates the adverse effect of thrust plate tilt on the bearing, so the preload coefficient of the tilting pad needs to be adjusted reasonably. The research in this paper can provide a theoretical reference for the optimization of the tilt angle of the thrust plate and provide data support for the engineering application of distributed hybrid thrust bearing with tilting pad. KeywordsHybrid thrust bearing • Thrust plate tilt • Tilting pad • Time-varying stiffness * Runlin Chen

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High-speed and heavy-load tribological properties of hydrostatic thrust bearing with double rectangular recess

Tang

Wang

et al. 2022

International Journal of Hydrogen Energy

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Performance analysis of high-stiffness bearing composited by hydrostatic cavities and tilting pads with preload

Cited by 6 publications

References 10 publications

Identification method of dynamic characteristics coefficients of tilting pad bearing in critical speed range of large unit

Identification method of dynamic characteristics coefficients of tilting pad bearing in critical speed range of large unit

Study on the influence of thrust plate tilt on performance of distributed hybrid thrust bearing with tilting pad

High-speed and heavy-load tribological properties of hydrostatic thrust bearing with double rectangular recess

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