Design and Performance Analysis of Dual Membrane Restrictor for Hydrostatic Bearing

Abstract

In this paper, a dual membrane restrictor design was proposed to improve the stiffness performance of the compensated hydrostatic bearing. Theoretical models for the proposed dual membrane restrictors were derived. Analysis of these models showed that a high stiffness region could be achieved at the desired loading region through the proper selection of the design parameters. A series of simulations were conducted to study the variations in the design parameters on the stiffness and clearance variations. It was found that the dimensionless membrane stiffness in the inlet restrictor, Kmi*, was the most dominant parameter for the performance of the compensated bearing system. The main advantages of the proposed dual membrane restrictor are the increase in flexibility by providing high stiffness at the desired loading region; and improving the stiffness performance of the bearing system especially at the desired loading region.

Assembly Error Tolerance Estimation for Large-Scale Hydrostatic Bearing Segmented Sliders under Static and Low-Speed Conditions

“…They also serve as a safety element that helps to align the surfaces using the pressure difference they generate. There are various types, from basic, such as orifice (see [19,20] or [21]), to more sophisticated, including membranes [22] or controllable elements, such as electromagnetic valves [23,24]. Previous research aimed to compensate for pad misalignment using compliant support numerically [25,26] and experimentally [27], respectively.…”

Friction and Lubrication of Sliding Bearings

“…Lin et al [8] proposed a dual-membrane restrictor design to improve the stiffness performance of the compensated hydrostatic bearing. They derived theoretical models for the proposed dual-membrane restrictors and found that the membrane stiffness in the inlet restrictor was the most dominant parameter for the performance of the compensated bearing system.…”