Design of an Aerostatic Thrust Bearing with Pressure-equalizing Grooves

Feng, Yongke; Zhang, Yanheng; Sun, Hanxu; Jia, Qingxuan; Ai, Chenguang

doi:10.3724/sp.j.1218.2012.00204

Cited by 1 publication

(1 citation statement)

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“…For this reason, researchers put forward a structural optimization method of setting pressure-equalizing grooves in aerostatic bearings. 16–18 By analyzing the influence of different shapes and geometric parameters of pressure-equalizing grooves on load capacity, it is found that the pressure-equalizing groove structure can suppress the attenuation of gas film pressure far away from the orifices and alleviate the phenomenon of high-pressure gas congestion and redundancy in the chamber, which can significantly improve the load capacity of aerostatic bearings. According to Du et al, 19,20 pressure-equalizing grooves are set up in the inner wall of aerostatic journal bearings, which are connected with gas supply holes.…”

Section: Introductionmentioning

confidence: 99%

Research on the influence of a micro-groove-orifice structure and its layout form on the static characteristics of aerostatic journal bearings under a high gas supply pressure

Cui

Zhu

et al. 2023

Advances in Mechanical Engineering

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To solve the problems of a low gas supply pressure and low load capacity of traditional orifice-compensated aerostatic journal bearings (OCAJBs), this paper presents the design of a double-row gas supply micro-groove-orifice aerostatic journal bearing (MGOAJB). By establishing new governing equations and introducing the SST k- ω turbulence model, the influence of the micro-groove-orifice (MGO) structure and its layout form on the static characteristics of aerostatic journal bearings under a high gas supply pressure are studied. It is found that under high gas supply pressure, the MGO structure can significantly improve the load capacity and stiffness and reduce the gas consumption of the MGOAJB compared with the OCAJB. With additional MGO structures in the eccentric direction of the spindle, the load capacity and stiffness of the bearing increase substantially, and the gas flow also increases. The layout direction of the MGO has a prominent influence on the static characteristics of the MGOAJB. Axial MGOs have a higher load capacity and stiffness and lower gas flow. The accuracy of the simulation method is verified by experiments. This study provides a theoretical basis and method for the design of aerostatic journal bearings under a high gas supply pressure.

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