Stiffness Model and Experimental Study of Hydrostatic Spindle System considering Rotor Swing

Chen, Runlin; Wang, Xingzhao; Du, Chenglie; Zha, Jun; Liu, Kai; Yuan, Xiao

doi:10.1155/2020/5901432

Cited by 6 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yingjie Wang et al 35 studied the characteristics of hydrostatic bearings by analyzing load capacity, stiffness, and dampness using CFD and 3D meshing, hence Compared to traditional empirical formulae, 3D meshing and CFD analysis were more accurate and could be adapted to the analysis of various shapes of hydrostatic bearings. Runlin Chen et al 36 studied a motorized hydrostatic spindle system of a grinding machine using a two-degree-of-freedom stiffness model, considering the rotation of the rotor, where stiffness was analyzed under different excitation frequencies, and the vibration test in the spindle system was implemented through the hammering method. The stiffness of the spindle system was found to agree well with the theoretical calculation, with an average error of about 14%.…”

Section: List Of Symbols Amentioning

confidence: 99%

Analytical study of the spherical hydrostatic bearing dynamics through a unique technique

Elescandarany

2023

Sci Rep

View full text Add to dashboard Cite

Because of their self-alignment property and design simplicity, the spherical hydrostatic bearings have the advantage over the other bearing configurations. Their static and dynamic performances have been intensively studied. Focusing on the bearing dynamic performance, it could be realized that the researchers used to mechanically excite the bearing in the experimental studies and perturb the rotor (spatial finite displacement) in the theoretical studies, observing its behavior and expressing it by dynamic stiffness and damping coefficient. Owing to a lack of information on bearing oscillation, this study adopts a new method to analyze this bearing behavior theoretically and grasp its nature. Unusually, the bearing vibration is studied hydro-dynamically rather than mechanically, showing the effect of eccentricity, inertia, restrictor type, seat configuration, and the supply pressure on the performance. New and unique formulas have been derived to predict the frequency, stiffness, and dampness, explaining how these parameters create the bearing self-alignment property. Some thrust bearings, designed with different techniques, have been examined where the results show vibration even in the bearing’s stationary state. Also, the newly derived formulas could precisely predict the rotation and rotational speed of the Kugel ball (recently proved and designed as a spherical hydrostatic bearing).

show abstract

Section: List Of Symbols Amentioning

confidence: 99%

Analytical study of the spherical hydrostatic bearing dynamics through a unique technique

Elescandarany

2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The stiffness and damping coefficients of sliding bearing can be obtained by the dynamic characteristic test methods, including the pulse excitation method [5], sinusoidal excitation method [6], multi-frequency excitation method [7] and non-excitation method [8]. Wang W M [9] studied the static and dynamic characteristics of tilting pad thrust bearings considering the viscosity-temperature effect of the lubricating oil and the elastic deformation of pads by modeling analysis and experimental verification.…”

Section: Introductionmentioning

confidence: 99%

Study on test method and experiment of dynamic characteristics of hydrostatic bearing

Tang,

Xu,

Chen

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

Self Cite

View full text Add to dashboard Cite

Based on the dynamic characteristic test methods of hydrostatic bearing, the basic principle and method of the hammering method, influence coefficient method and string wave scanning method are analyzed in this paper. The measurement equations of the above test methods are derived in the dynamic characteristic test. The dynamic characteristics of the hydrostatic bearing were tested by the inverted sliding bearing dynamic characteristics test bench. The stiffness coefficients of bearing can be obtained by the approximate formula. The test results were compared with the theoretical values. The results show that the stiffness coefficients of the hydrostatic bearing can be effectively obtained by the three dynamic characteristics test methods. The error between the test results and the theoretical results of stiffness coefficients is less than 3%. The deviation of the identification results of the three test methods is in the range of -2%~+3%. It is preliminarily proved that the three test methods are feasible to identify the stiffness and damping coefficients of the hydrostatic bearing.

show abstract

“…Precision machine tools are developing in the direction of high precision and high rigidity. Sliding bearing is an important component widely used in machine tools and has a great influence on the performance of machine tools [1]. The performance of liquid sliding bearing is directly affected by the state of the oil film.…”

Section: Introductionmentioning

confidence: 99%

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.

Self Cite

View full text Add to dashboard Cite

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

show abstract

Stiffness Model and Experimental Study of Hydrostatic Spindle System considering Rotor Swing

Cited by 6 publications

References 8 publications

Analytical study of the spherical hydrostatic bearing dynamics through a unique technique

Analytical study of the spherical hydrostatic bearing dynamics through a unique technique

Study on test method and experiment of dynamic characteristics of hydrostatic bearing

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

Contact Info

Product

Resources

About