Numerical analysis and experimental investigation into the effects of manufacturing errors on the running accuracy of the aerostatic porous spindle

Cui, Hui; Wang, Yang; Yue, Xiaobin; Huang, Ming; Wei, Wang; Jiang, Zhengyi

doi:10.1016/j.triboint.2017.09.020

Cited by 44 publications

(33 citation statements)

References 29 publications

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“…In the reported studies, the manufacturing errors of thrust bearing were approximately expressed in mathematical formulas. In this study, the main manufacturing error of thrust bearing is surface non-flatness, which can be denoted as 30 where ς is the radial coordinate, θ is the circumferential coordinate, σ is the reference radius and can be denoted as where rin is inner radius, rout is the outer radius.…”

Section: Numerical Calculation Methodsmentioning

confidence: 99%

“…In the transient calculation, the moving wall boundary needs to be moved at a given periodic incentive, and the moving boundary and mesh must satisfy the following equations 30 where Γ denotes the generalized diffusion coefficient, φ denotes general scalar, u→g denotes the mesh motion speed, n and n + 1 denote the current and next time step, n f denotes the number of faces on the control volume, A→j denotes the j face area vector, δVj denotes the volume swept out at face j during the time interval Δt.…”

Section: Numerical Calculation Methodsmentioning

confidence: 99%

“…Cui et al. 30 also proposed a numerical analysis based on DMT to calculate the effects of manufacturing errors on rotation errors of aerostatic bearings with porous restrictor.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the dynamic performance of aerostatic thrust bearings with different restrictors

Cui

Wang

Yue

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study utilizes a dynamic mesh technology to investigate the dynamic performance of aerostatic thrust bearings with orifice restrictor, multiple restrictors, and porous restrictor. An experiment, which investigates the bearing static load capacity, was carried out to verify the calculation accuracy of dynamic mesh technology. Further, the impact of incentive amplitude, incentive frequency, axial eccentricity ratio, and non-flatness on the bearing dynamic performance was also studied. The results show incentive amplitude effect can be ignored at the condition of amplitude less than 5% film thickness, while the relationship between dynamic characteristics and incentive frequency presented a strong nonlinear relationship in the whole frequency range. The change law of dynamic stiffness and damping coefficient for porous restrictor was quite different from orifice restrictor and multiple restrictors. The bearing dynamic performance increased significantly with the growth of axial eccentricity ratio, and the surface non-flatness enhanced dynamic performance of aerostatic thrust bearings.

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Section: Numerical Calculation Methodsmentioning

confidence: 99%

Section: Numerical Calculation Methodsmentioning

confidence: 99%

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Numerical analysis of the dynamic performance of aerostatic thrust bearings with different restrictors

Cui

Wang

Yue

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The co-efficient of damping and stiffness of restrictors with feedholes are larger than compound restrictors of bearings. Cui et al [6] carried out a study on pressure distribution of film, affected the porous aerostatic bearings by manufacturing errors. Jianbo Zhanga et al [25] analyzed that the depression of pressure is debilitated by increasing diameter of orifice, minimizing the film thickness and pressure supply.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Simulation of Aerostatic Thrust Bearings

et al. 2020

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This paper demonstrates modeling and simulation comparison of the static characteristics of a porous, orifice, and multiple type aerostatic thrust bearings on the basis of load-carrying capacity(LCC) and stiffness. The Navier-Stokes (N-S) equations are used to solve the internal distribution of pressure in computational fluid dynamics(CFD) simulation environment. An axisymmetric model, which minimizes the computational time and increases efficiency, is used to evaluate the static characteristics of a porous, orifice, and multiple restrictors of aerostatic bearings. Our numerical analysis and empirical results show the agreement with significant affect of material and geometrical parameters on the LCC and stiffness. The thickness of the air film is less than 10µm, the multiple orifice restrictors have more LCC than porous and orifice restrictor. The porous restrictor's stiffness is larger than orifice and multiple restrictors. The LCC of porous and orifice is notably smaller than multiple orifice restrictors. Additionally, it is analyzed that LCC of porous, orifice, and multiple orifice restrictors can be improved with an increase in the supply of air pressure.

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“…Many researchers concentrate on improving the stiffness and stability of aerostatic bearings [1]. The capacity and stiffness of aerostatic bearings can be improved by increasing gas supply pressure, number of grooves [2] and orifices [3][4][5], or selecting multiple [6][7], and porous restrictors [8]. Some work has been done using RNM method about the influence of the length and depth of the grooves on the static and dynamic characteristics of aerostatic bearings [9][10].…”

Section: Introductionmentioning

confidence: 99%

Improving Capacity, Stiffness and Pneumatic Hammer Stability of Aerostatic Thrust Bearing Using Damping Orifice and Virtual Recess

Kong

2020

Preprint

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An aerostatic thrust bearing is designed using damping orifice and virtual recess. Finite element simulations and measurements are performed and results indicate that with damping orifice and virtual recess, the maximum capacity of the designed aerostatic bearing increases from 1590 N to 2285 N and its maximum stiffness increases from 106 N/μm to 145 N/μm, while the range of pneumatic hammer decreases from 8.5 μm to 4.5 μm at 4 bar. It is therefore concluded that damping orifice and virtual recess are one of the means which can be used to improve the capacity, stiffness and pneumatic hammer stability of aerostatic bearing.An aerostatic thrust bearing is designed using damping orifice and virtual recess. Finite element simulations and measurements are performed and results indicate that with damping orifice and virtual recess, the maximum capacity of the designed aerostatic bearing increases from 1590 N to 2285 N and its maximum stiffness increases from 106 N/μm to 145 N/μm, while the range of pneumatic hammer decreases from 8.5 μm to 4.5 μm at 4 bar. It is therefore concluded that damping orifice and virtual recess are one of the means which can be used to improve the capacity, stiffness and pneumatic hammer stability of aerostatic bearing.

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Numerical analysis and experimental investigation into the effects of manufacturing errors on the running accuracy of the aerostatic porous spindle

Cited by 44 publications

References 29 publications

Numerical analysis of the dynamic performance of aerostatic thrust bearings with different restrictors

Numerical analysis of the dynamic performance of aerostatic thrust bearings with different restrictors

Modelling and Simulation of Aerostatic Thrust Bearings

Improving Capacity, Stiffness and Pneumatic Hammer Stability of Aerostatic Thrust Bearing Using Damping Orifice and Virtual Recess

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