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Recent Patents on Engineering

Author(s): Yanqin Zhang, Jianting Tao, Shiqian Ni* and Rong Zhao

DOI: 10.2174/1872212118666230224121459

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Mechanical Performance Analysis of Hydrostatic Thrust Bearing under Microbevel Parameters

Article ID: e240223214025 Pages: 8

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Abstract

Background: Heavy-duty hydrostatic bearings of the original parallel friction pair are prone to hydrostatic loss problems during operation.

Aims: The aim is to solve the problem of lubrication failure, the original hydrostatic oil pad was designed as a micro-inclined plane, and the dynamic pressure caused by the micro-wedge of the oil pad at a higher speed was used to compensate for the static pressure loss of the bearing.

Objective: This study aims at a new type of q1-205 micro bevel double rectangular cavity hydrostatic bearing.

Methods: The mathematical model of oil film theoretical analysis of hydrostatic bearing with the micro-inclined surface was established, including the flow equation of a double rectangular cavity with a micro-inclined surface and static and dynamic bearing capacity equation.

Results: In this patent paper, the mechanical properties of oil film with tilt height between 0 and 0.1mm were simulated with variable viscosity, and the distribution law of pressure field under different working conditions was obtained. Through the experimental study, the pressure data of parallel flat pads and tilting pads under different working conditions are measured and compared with the simulation data.

Conclusion: The pressure loss value of the Δh ≈ 70 μm oil pad designed in this paper is relatively small under extreme working conditions. The overall loss rate is about 10% ~ 20%, and the dynamic pressure compensation rate is about 16%. The dynamic pressure generated by the slight inclination Angle can well compensate for the static pressure loss.

Keywords: Hydrostatic thrust bearing, micro-bevel double rectangular cavity, wedge height, variable viscosity, dynamic pressure performance, static pressure.

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