A self-sensing gas static pressure bearing for gas film pressure field and its measurement method

By using a flexible load-bearing structure and an embedded intelligent sensing unit to self-sensing gas static pressure bearing for film pressure field, the problems of large disturbances, complex structures, and poor reliability in the existing technology for film flow field are solved, and high-precision, disturbance-free online measurement of film pressure field is achieved.

CN122083069APending Publication Date: 2026-05-26ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve high-precision and reliable online measurement of the air film pressure field while maintaining an undisturbed air film flow field, and are also difficult to integrate into actual equipment.

Method used

The gas static pressure bearing with flexible bearing structure and embedded intelligent sensing unit can realize the self-sensing measurement of gas film pressure by converting the slight deflection of the flexible bearing structure into electrical or optical signals, thus avoiding disturbance to the gas film flow field.

Benefits of technology

It achieves highly sensitive and reliable measurement of air film pressure field without changing the air film geometry. The structure is simple and compact, making it suitable for engineering applications.

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Abstract

This invention relates to the field of gas static pressure bearings and precision measurement technology, and discloses a gas static pressure bearing with self-sensing gas film pressure field and a measurement method, comprising: a bearing base, an air supply cavity, a throttling orifice, a rigid island, a flexible bearing structure, a thin-plate elastic bearing unit, a thinning zone, a wire cavity, a gas film, a wire, an intelligent sensing unit, and a supported component; this invention constructs a flexible bearing structure with controlled flexibility below the bearing working surface, and embeds intelligent materials such as piezoelectric elements, piezoresistive strain elements, magnetic microwires or optical fibers within the flexible bearing structure, so that the minute elastic deflection generated by the bearing body under the action of gas film load is converted into a measurable electrical signal or optical signal, thereby realizing the measurement of the gas film pressure field, and with almost no disturbance to the gas film flow field.
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Citation Information

Patent Citations

  • Performance testing device of static-pressure air bearing

    CN101852684A

  • Method for measuring pressure of gas film of gas bearing

    CN102175380A

  • Aerostatic thrust bearing gas film surface pressure distribution measurement method and apparatus

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  • Dynamic gas membrane pressure testing device for dynamic-static pressure gas bearing and testing method

    CN108225655A

  • Gas film pressure testing device and method for gas bearing

    CN110296839A