Analysis on Dynamic Characteristics of Closed Hydrostatic Guideway Throttled by Capillary

Abstract:

Hydrostatic guideway is widely used in heavy and ultra-precision machine tools due to their high bearing capacity, low coefficient of friction and high capacity of precision-remaining. So it is necessary to carry on theoretical research on its dynamic characteristics. Firstly, the oil-film damping coefficient of closed hydrostatic guideway throttled by capillary is derived. Secondly, a new dynamic mathematical model, considering the oil damping effect, the extrusion effect and the volume effect, of the closed hydrostatic guideway is proposed. Thirdly, the frequency characteristics and step characteristics of it are simulated in Matlab Simulink through the transfer function. Finally, the paper investigates the influence of damping coefficient, the oil pressure, volume effect and the initial oil-film thickness on the dynamic characteristics of closed hydrostatic guideway throttled by capillary.

• Periodical: Applied Mechanics and Materials (Volume 607)
• Pages: 594-599
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.607.594
• Online since: July 2014
• Authors: Xiao Chuang Zhu, Wei Guo Gao*, Teng Liu, Sheng Hui Zhao, Guan Wei Zhang, Da Wei Zhang
• Keywords: Damping Coefficient, Dynamic Characteristic, Hydrostatic Guideway

References

[1] R. Pascual, V. Meruane, Identification of nonlinear dynamic coefficients in plain journal bearings, Tribology International, 41, 8 (2008): 743-754.

DOI: 10.1016/j.triboint.2008.01.002

[2] C.H. Chen, Y. Kang, Y.P. Chang, Influences of recess depth on the stability of the Jeffcott rotor supported by hybrid bearings with orifice restrictors, Industrial Lubrication and Tribology, 57, 1 (2005): 41-51.

DOI: 10.1108/00368790510575978

[3] V. Kumar, S.C. Sharma, S.C. Jain, On the restrictor design parameter of hybrid journal bearing for optimum rotordynamic coefficients, Tribology International, 39, 4 (2006): 356-368.

DOI: 10.1016/j.triboint.2005.03.015

[4] X.Z. Meng, J.X. Yang, Z.M. Meng, Engineering Science, 5, 3 (2003): 62-66. (In Chinese).

[5] L.M. Lu, Machine Tool & Hydraulics, 36, 4 (2008): 247-249. (In Chinese).

[6] Z.C. Zhang, Theoretical and simulation analysis of static and dynamic characteristics of hydrostatic guideway with PM controller, Master thesis, Yanshan University; 2012. (In Chinese).

[7] Z.Q. Ding, Hydrostatic bearing design, Shanghai (1989). (In Chinese).