Numerical Simulation and Experimental Study on the Gas-Solid Coupling of the Aerostatic Thrust Bearing with Elastic Equalizing Pressure Groove

Zhao, Xiaolong; Zhang, Junan; Hao, Dong; Zhou, Fang; Li, Junning

doi:10.1155/2017/5091452

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Even if only one or two axial grooves are set on the inner wall of the bearing, the effect is still prominent. In Zhao et al, 21,22 a deforming elastic pressure-equalizing groove structure is adopted to improve the orifice-compensated aerostatic thrust bearing and floating slide channel, which proves the feasibility and superiority of this structure. However, this deforming elastic pressure-equalizing groove technology has a high material requirement, which limits its application.…”

Section: Introductionmentioning

confidence: 93%

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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Section: Introductionmentioning

confidence: 93%

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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“…e new aerostatic bearing model with EEPG is shown in Figure 1 [15]. Figure 1(a) shows the physical model of the bearing, Figure 1(b) shows the physical map of the bearing, and Figure 1(c) shows the schematic diagram of the deformation of the EEPG.…”

Section: Physical Modelmentioning

confidence: 99%

Study on Dynamic Characteristics of Aerostatic Bearing with Elastic Equalizing Pressure Groove

Zhao

Hao

Zhou

et al. 2018

Shock and Vibration

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Microvibration has an important influence on the dynamic performance of aerostatic bearings. Dynamic stiffness and equivalent damping coefficient are the main indexes to evaluate the dynamic characteristics of the aerostatic bearing. In order to study the dynamic characteristics of a new type of aerostatic bearing with the elastic equalizing pressure groove (EEPG), the dynamic characteristics of the new type of bearing are studied by theoretical calculation and experiment. First, the dynamic gas-solid coupling control equation is established.en, the steady term and the perturbation term are decomposed by the perturbation method. By solving the coupling model, the dynamic characteristics of the bearing are calculated and analyzed.e calculation results show that the perturbation frequency has a significant effect on the dynamic stiffness and equivalent damping coefficient of the aerostatic bearing with EEPG. e dynamic stiffness increases with the increase of frequency, and the equivalent damping coefficient decreases with the increase of frequency. e experimental results are basically the same with the theoretical results, which effectively verify the correctness of the theoretical analysis.

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“…When gas flows from the outlet and produces a pressure drop, the aerostatic film has a certain bearing capacity and stiffness. Due to their high accuracy of motion, wide speed range, small amount of friction, lack of pollution, and low heat generation, aerostatic bearings have been widely used in the aerospace industry and the IT chip manufacturing industry, as well as for the manufacturing of ultraprecision equipment and national defense application equipment in addition to other fields and applications [1][2][3]. With the development of precision and ultraprecision technology, higher and more urgent requirements have been proposed for the stiffness, accuracy, and stability of aerostatic bearings [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research and Analysis of the Static Characteristics of Aerostatic Bearings with a Multihole Integrated Restrictor

Lü

Zhang

2020

Shock and Vibration

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In order to further study the performance of aerostatic bearing, an aerostatic bearing with a multihole integrated restrictor was proposed in this paper. Based on the physical model of aerostatic bearings, the governing equation was established, deduced discretely, and solved numerically by the finite-difference method and flow balance principle in Cartesian coordinates. The bearing capacity and stiffness of aerostatic bearings have been analyzed, and the relevant experimental research has been carried out in this paper. The results showed that the number of orifices in the integrated restrictor had a significant effect on the bearing capacity, and the maximum bearing capacity of a nine-hole integrated throttling bearing was approximately 1.9 times greater than that of a single-hole bearing. The bearing stiffness was greatly affected by the diameter of the orifices, and the optimum bearing stiffness was determined. The corresponding gas film clearance also changed accordingly.

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Numerical Simulation and Experimental Study on the Gas-Solid Coupling of the Aerostatic Thrust Bearing with Elastic Equalizing Pressure Groove

Cited by 7 publications

References 16 publications

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

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

Study on Dynamic Characteristics of Aerostatic Bearing with Elastic Equalizing Pressure Groove

Research and Analysis of the Static Characteristics of Aerostatic Bearings with a Multihole Integrated Restrictor

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