A new type of aerostatic thrust bearing with high stiffness

Junan Zhang, Li Yuan, Zongde Fang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The precision and ultraprecision machinery requires increasing the stiffness of aerostatic bearing. In this paper, a new type of aerostatic thrust bearing with high stiffness is presented. The principle of the new bearing is studied. The air pressure reaction in the bearing gap on load makes annular membrane elastically deform. The elastic deformation brings about changes of throttling area and pressure groove depth of the bearing. The result is that the stiffness of new aerostatic thrust bearing is increased observably. The load characteristics are analyzed the theoretically in this paper. The coupling procedure of two governing equations of aerostatic lubrication and elastic deformation of membrane are introduced. The numerical analysis and experiments of an example are compared which proves the principle and the design of the new bearing. The stiffness of the new aerostatic bearing doubles that of the present aerostatic bearing. The principle can be applied to the aerostatic radial bearing extensively and the new bearing opens a vast range of application.

Original languageEnglish
Title of host publicationInternational Technology and Innovation Conference 2006, ITIC 2006
Pages1637-1641
Number of pages5
Edition524
DOIs
StatePublished - 2006
EventInternational Technology and Innovation Conference 2006, ITIC 2006 - Hangzhou, China
Duration: 6 Nov 20067 Nov 2006

Publication series

NameIET Conference Publications
Number524

Conference

ConferenceInternational Technology and Innovation Conference 2006, ITIC 2006
Country/TerritoryChina
CityHangzhou
Period6/11/067/11/06

Keywords

  • Aerostatic bearing
  • Pressure groove
  • Stiffness
  • Ultraprecision

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