The influences of capillary restriction and journal eccentricity on the stability of the rigid rotor‐hybrid bearing system

Chen, Cheng‐Hsien; Chang, Yeon‐Pun; Lee, Hsing-Han; Wang, Yea-Ping; Yuan, Kun

doi:10.1108/00368790710723133

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The bearings are characterized by the geometric configurations, so the restriction parameters and the optimization values of the bearings are significant in the dynamic characteristics of ABS. 21 As shown in Fig. 1, the spindle shaft adopts an integral structure of the journal and axial bearings, and all the bearings adopt the small orifice throttles.…”

Section: Spindle Shaft Geometrymentioning

confidence: 99%

An Mechatronics Coupling Design Approach for Aerostatic Bearing Spindles

Sun

Chen

et al. 2019

Int. J. Precis. Eng. Manuf.

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Section: Spindle Shaft Geometrymentioning

confidence: 99%

An Mechatronics Coupling Design Approach for Aerostatic Bearing Spindles

Sun

Chen

et al. 2019

Int. J. Precis. Eng. Manuf.

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“…Chen et al [19,20] studied the influence of limit parameters, capillary limit and bearing eccentricity, on the stability of rigid rotor-hybrid bearing system and obtained the optimal parameters of hybrid bearing design. Karkkainen et al [21] studied the dynamics of the rotor supported by the active magnetic bearing during the lowering of the cage bearing and the effect of misalignment of the cage bearing during the lowering of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Lubrication State of Sliding Bearings in Low-Speed Rotor System Subjected to Torque Load

Pang

Jiang

Jin

2019

International Journal of Rotating Machinery

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In order to study the influence of torque load on the lubrication and wear of the sliding bearing of the rigid rotor system, the theoretical and experimental researches on the single-span rotor system with low speed were carried out. A special force sensor was used to measure the bearing load under different torque excitations, and the oil film pressure was calculated. The oil film pressure and thickness of sliding bearing under low speed (210r/min) were simulated by combining the lubrication theory. Based on the film thickness ratio theory, the corresponding relationship between the lubrication state and the torque load value was deduced. In addition, the wear rate and abrasive grain morphology of sliding bearing with different torque values were analyzed by means of oil sample preparation to verify this correspondence. The results show that the film thickness ratio has a logarithmic function relationship with the constant torque load, and the film thickness ratio curve can be used to determine the corresponding torque values under different lubrication states. The wear rate under mixed lubrication state increases exponentially with the torque load, and the main wear mechanism is adhesive wear and abrasive wear. The research results have certain guiding significance to the adjustment of the actual running condition of sliding bearing and its life prediction.

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“…A journal bearing is the main supporting component required for the stability and sustainable dynamic characteristics of the rotor system [1][2][3][4][5]. Many researchers are devoted to analysing the lubrication mechanism in a journal bearing.…”

Section: Introductionmentioning

confidence: 99%

A superlinear iteration method for calculation of finite length journal bearing's static equilibrium position

et al. 2017

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Solving the static equilibrium position is one of the most important parts of dynamic coefficients calculation and further coupled calculation of rotor system. The main contribution of this study is testing the superlinear iteration convergence method—twofold secant method, for the determination of the static equilibrium position of journal bearing with finite length. Essentially, the Reynolds equation for stable motion is solved by the finite difference method and the inner pressure is obtained by the successive over-relaxation iterative method reinforced by the compound Simpson quadrature formula. The accuracy and efficiency of the twofold secant method are higher in comparison with the secant method and dichotomy. The total number of iterative steps required for the twofold secant method are about one-third of the secant method and less than one-eighth of dichotomy for the same equilibrium position. The calculations for equilibrium position and pressure distribution for different bearing length, clearance and rotating speed were done. In the results, the eccentricity presents linear inverse proportional relationship to the attitude angle. The influence of the bearing length, clearance and bearing radius on the load-carrying capacity was also investigated. The results illustrate that larger bearing length, larger radius and smaller clearance are good for the load-carrying capacity of journal bearing. The application of the twofold secant method can greatly reduce the computational time for calculation of the dynamic coefficients and dynamic characteristics of rotor-bearing system with a journal bearing of finite length.

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The influences of capillary restriction and journal eccentricity on the stability of the rigid rotor‐hybrid bearing system

Cited by 4 publications

References 6 publications

An Mechatronics Coupling Design Approach for Aerostatic Bearing Spindles

An Mechatronics Coupling Design Approach for Aerostatic Bearing Spindles

Investigation on Lubrication State of Sliding Bearings in Low-Speed Rotor System Subjected to Torque Load

A superlinear iteration method for calculation of finite length journal bearing's static equilibrium position

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