Research on the fluctuation of the velocity and pressure of the flow field of an aerostatic bearing with a multi-hole integrated restrictor. (October 2021)

• Record Type: Journal Article
• Authors: Lu, Zhiwei; Zhang, Junan; Liu, Bo
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 235:Number 10(2021)
• Page Start: 2007
• Page End: 2020
• Publication Date: 2021-10
• Subjects: Aerostatic bearing -- multi-hole integrated restrictor -- fluctuation -- orifice; Tribology -- Periodicals; 621.89
• DOI: 10.1177/1350650120985252
• Languages: English
• ISSNs: 1350-6501

Abstract

For an aerostatic bearing with a multi-hole integrated restrictor, which achieved superior precision lubrication-bearing performance, the fluctuations of the velocity and the pressure of the flow field were investigated. In this paper, the large-eddy simulation method was used to solve the three-dimensional Navier–Stokes equation in the calculation area of the gas film flow field at the orifice outlet of an aerostatic bearing, while the overrelaxation iteration method was used to solve the Reynolds equation in the remaining calculation areas. The influence factors of the flow field, such as the diameter of the orifice, the gas supply pressure and the gas film clearance, were derived and discussed. The results showed that the diameter of the orifice and the gas film clearance of aerostatic bearings with a multi-hole integrated restrictor strongly affected the film flow field near the outlet of the restrictor under a specified gas supply pressure. There was a critical ratio between the gas film clearance and the diameter of the orifice of aerostatic bearings with a multi-hole integrated restrictor, which may be an initial signal and an important parameter of the flow field transition from laminar flow to turbulent flow.