Polymer Aerostatic Thrust Bearing under Circular Support for High Static Stiffness
A new design of aerostatic thrust bearing is proposed
for high static stiffness. The bearing body, which is mead of polymer
covered with metallic membrane, is held by a circular ring. Such a
support helps form a concave air gap to grasp the air pressure. The
polymer body, which can be made rapidly by either injection or
molding is able to provide extra damping under dynamic loading. The
smooth membrane not only serves as the bearing surface but also
protects the polymer body. The restrictor is a capillary inside a silicone
tube. It can passively compensate the variation of load by expanding
the capillary diameter for more air flux. In the present example, the
stiffness soars from 15.85 N/μm of typical bearing to 349.85 N/μm at
bearing elevation 9.5 μm; meanwhile the load capacity also enhances
from 346.86 N to 704.18 N.
[1] Y.-B. P. Kwan and J.B. Post, “A tolerancing procedure for inherently
compensated, rectangular aerostatic thrust bearings,” Tribology
International, vol. 33, pp. 581-585, 2000.
[2] T. Aoyama, Y. Kakinuma, and Y. Kobayashi, “Numerical and
experimental analysis for the small vibration of aerostatic guideways,”
Annals of the CIRP- Manufacturing Tech., vol. 55 (1), pp. 419-422, 2006.
[3] S. Yoshimoto and K. Kohno, “Static and dynamic characteristics of
aerostatic circular porous thrust bearings (effect of the shape of the air
supply area),” ASME Trans., J. Tribology, vol. 123 (3), pp. 501-508,
2001.
[4] G. Belforte, T. Raparelli, V. Viktorov, and A. Trivella, “Metal woven
wire cloth feeding system for gas bearings,” Tribology International, vol.
42, pp. 600-608, 2009.
[5] S.-H. Lu, Study on the static characteristics of aerostatic thrust bearing
combining metallic and polymer components, Master Thesis, National
Yunlin University of Science and Technology, Taiwan, June, 2014.
[6] F. Al-Bender, “On the modelling of the dynamic characteristics of
aerostatic bearing films: From stability analysis to active compensation,”
Precision Engineering, vol. 33, pp. 117-126, 2009.
[7] C.-H. Yu, Influences of the geometrical and material parameters on the
static characteristics of metallic and polymer aerostatic thrust bearings,
Master Thesis, National Yunlin University of Science and Technology,
Taiwan, January, 2015.
[1] Y.-B. P. Kwan and J.B. Post, “A tolerancing procedure for inherently
compensated, rectangular aerostatic thrust bearings,” Tribology
International, vol. 33, pp. 581-585, 2000.
[2] T. Aoyama, Y. Kakinuma, and Y. Kobayashi, “Numerical and
experimental analysis for the small vibration of aerostatic guideways,”
Annals of the CIRP- Manufacturing Tech., vol. 55 (1), pp. 419-422, 2006.
[3] S. Yoshimoto and K. Kohno, “Static and dynamic characteristics of
aerostatic circular porous thrust bearings (effect of the shape of the air
supply area),” ASME Trans., J. Tribology, vol. 123 (3), pp. 501-508,
2001.
[4] G. Belforte, T. Raparelli, V. Viktorov, and A. Trivella, “Metal woven
wire cloth feeding system for gas bearings,” Tribology International, vol.
42, pp. 600-608, 2009.
[5] S.-H. Lu, Study on the static characteristics of aerostatic thrust bearing
combining metallic and polymer components, Master Thesis, National
Yunlin University of Science and Technology, Taiwan, June, 2014.
[6] F. Al-Bender, “On the modelling of the dynamic characteristics of
aerostatic bearing films: From stability analysis to active compensation,”
Precision Engineering, vol. 33, pp. 117-126, 2009.
[7] C.-H. Yu, Influences of the geometrical and material parameters on the
static characteristics of metallic and polymer aerostatic thrust bearings,
Master Thesis, National Yunlin University of Science and Technology,
Taiwan, January, 2015.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:70817", author = "S. W. Lo and C.-H. Yu", title = "Polymer Aerostatic Thrust Bearing under Circular Support for High Static Stiffness", abstract = "A new design of aerostatic thrust bearing is proposed
for high static stiffness. The bearing body, which is mead of polymer
covered with metallic membrane, is held by a circular ring. Such a
support helps form a concave air gap to grasp the air pressure. The
polymer body, which can be made rapidly by either injection or
molding is able to provide extra damping under dynamic loading. The
smooth membrane not only serves as the bearing surface but also
protects the polymer body. The restrictor is a capillary inside a silicone
tube. It can passively compensate the variation of load by expanding
the capillary diameter for more air flux. In the present example, the
stiffness soars from 15.85 N/μm of typical bearing to 349.85 N/μm at
bearing elevation 9.5 μm; meanwhile the load capacity also enhances
from 346.86 N to 704.18 N.", keywords = "Aerostatic, bearing, polymer, static stiffness.", volume = "9", number = "10", pages = "1706-4", }