Theoretical and experimental investigation on the effect of supply pressure on the nonlinear behaviors of the aerostatic bearing-rotor system

Zhang, Jianbo; Han, Dongjiang; Song, Mengxuan; Xie, Zhongliang; Rao, Zhushi; Zou, Donglin

doi:10.1016/j.ymssp.2021.107775

Cited by 23 publications

(12 citation statements)

References 28 publications

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“…The results indicated that the micro-vibration of the bearing could be restrained by decreasing orifice diameter and air chamber depth. Zhang et al [4] pointed out that the nonlinear behaviours of aerostatic bearing could be restrained by adjusting the air supply pressure. Maamari et al [5] presented a design reference ensuring the high stiffness and positive damping of aerostatic bearing based on the fluid-structure interaction model.…”

Section: Introductionmentioning

confidence: 99%

Structure design and performance analysis of aerostatic thrust bearing with compound restrictors

et al. 2022

MATEC Web Conf.

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Aerostatic thrust bearing compensated by multi-orifices and porous material restrictor simultaneously is proposed to improve the static performance of the bearing. Load Carrying Capacity (LCC), stiffness and the flow field characteristics of the bearing are obtained by Computational Fluid Dynamic (CFD) simulation. The influences of supply pressure, orifice number, orifice diameter, orifice distribution, porous material thickness and permeability coefficient on the bearing performance are analysed. It is indicated that LCC and stiffness of the bearing with compound restrictors are much higher than those of the bearing with porous material restrictor or multi-orifice restrictor if gas film thickness is in rational range. The bearing with compound restrictors has better stability than that of the bearing with multi-orifice restrictor. Moreover, the optimum bearing parameters with compound restrictors are given to improving the performance of aerostatic thrust bearing.

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Section: Introductionmentioning

confidence: 99%

Structure design and performance analysis of aerostatic thrust bearing with compound restrictors

et al. 2022

MATEC Web Conf.

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“…Furthermore, Wang et al designed and calculated a series of non-linear dynamic parameters such as phase angle trajectory, power spectrum and bifurcation diagram [7] to study the non-linear behavior of the aerostatic bearings [8], porous bearings [9], self-acting bearings [10], etc., Belforte et al designed a high-speed electrospindle for 100 krpm and analyzed the static and dynamic runout of the spindle by solving the time-domain Reynolds equation for gas film together with the equation of motion of the rotor [11]. Zhang studied the nonlinear behavior of the aerostatic bearing-rotor systems based on the bifurcation diagram, orbit of rotor center and frequency spectrum diagram [12]. They indicated that the increase of the supply pressure could restrict the non-linear behaviors.…”

Section: Introductionmentioning

confidence: 99%

Non-Linear Dynamic Analysis on Hybrid Air Bearing-Rotor System under Ultra-High Speed Condition

et al. 2022

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The non-linear dynamic behavior of a hybrid air bearing-rotor system is very complicated and requires careful attention when designing to avoid spindle failure, especially under ultra-high speed condition. In this paper, the rotor trajectory of a hybrid air bearing-rotor system is obtained by solving the unsteady Reynolds equation and motion equations simultaneously. The typical non-linear behavior of hybrid air bearing-rotor systems is illustrated with the analysis of the rotor trajectory, the phase angle, time domain vibration and power spectral density. Furthermore, the influences of the rotor mass, external load, rotating speed and unbalanced mass on the non-linear behavior are investigated. Finally, the effect of structure parameters on the rotor trajectory is studied and the phenomenon under ultra-high speed condition is illustrated, which provides some new guidelines on the ultra-high speed air spindle design.

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“…In addition, a numerical calculation method, via a finite element method and a proportional division method, was proposed to optimize the angular stiffness of aerostatic bearings [17]. In another related work, the nonlinear behaviors of the aerostatic bearing-rotor system were theoretically and experimentally investigated [18]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Rational Design and Porosity of Porous Alumina Ceramic Membrane for Air Bearing

Xiao

et al. 2021

Membranes

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Air bearing has been widely applied in ultra-precision machine tools, aerospace and other fields. The restrictor of the porous material is the key component in air bearings, but its performance is limited by the machining accuracy. A combination of optimization design and material modification of the porous alumina ceramic membrane is proposed to improve performance within an air bearing. Porous alumina ceramics were prepared by adding a pore-forming agent and performing solid-phase sintering at 1600 °C for 3 h, using 95-Al2O3 as raw material and polystyrene microspheres with different particle sizes as the pore-forming agent. With 20 wt.% of PS50, the optimum porous alumina ceramic membranes achieved a density of 3.2 g/cm3, a porosity of 11.8% and a bending strength of 150.4 MPa. Then, the sintered samples were processed into restrictors with a diameter of 40 mm and a thickness of 5 mm. After the restrictors were bonded to aluminum shells for the air bearing, both experimental and simulation work was carried out to verify the designed air bearing. Simulation results showed that the load capacity increased from 94 N to 523 N when the porosity increased from 5% to 25% at a fixed gas supply pressure of 0.5 MPa and a fixed gas film thickness of 25 μm. When the gas film thickness and porosity were fixed at 100 μm and 11.8%, respectively, the load capacity increased from 8.6 N to 40.8 N with the gas supply pressure having been increased from 0.1 MPa to 0.5 MPa. Both experimental and simulation results successfully demonstrated the stability and effectiveness of the proposed method. The porosity is an important factor for improving the performance of an air bearing, and it can be optimized to enhance the bearing’s stability and load capacity.

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Theoretical and experimental investigation on the effect of supply pressure on the nonlinear behaviors of the aerostatic bearing-rotor system

Cited by 23 publications

References 28 publications

Structure design and performance analysis of aerostatic thrust bearing with compound restrictors

Structure design and performance analysis of aerostatic thrust bearing with compound restrictors

Non-Linear Dynamic Analysis on Hybrid Air Bearing-Rotor System under Ultra-High Speed Condition

Rational Design and Porosity of Porous Alumina Ceramic Membrane for Air Bearing

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