... and ψ represents the gap ratio. The Reynolds boundary conditions are selected for solving the Reynolds equation: Tilting-pad journal bearing Database Oil film force Load capacity State Grid Corporation of China 5500-202416156A-1-1-ZN. This study was supported by State Grid...

...Ruirui Li; Xiangbo He; Kai Zhang; Yunfeng Peng; Dongping Zhan Purpose This study aims to quantifying the effects of hydrodynamic forces on spindle performance under eccentric and rotational conditions, which can impact load capacity and rotational accuracy, ultimately affecting the machining...

... parameters of GB is explored. Furthermore, a general structural design principle based on static analysis, rotordynamic performance and system stability is established for the single-structured HGMB. Findings Load capacity is vastly reduced due to the enlarged radial clearance of the GB. A minimum...

... was studied using various bearing structure parameters. Findings The increased slip length changed the classical feature distribution of the film pressure and temperature. The sacrifice of the bearing load capacity effectively compensated for the aerodynamic thermal effect and friction torque under...

... adverse effect on the load capacity of GFCB. When the taper error is −0.03°, the radial load capacity Fr and axial load capacity Fz decrease by 37.5 and 58.3%, respectively. The taper error decreases the direct stiffness and cross-coupled damping of GFCB, which will weaken the bearing stability. Moreover...

... are calculated. The effect law of sleeve roundness error on the static performance under different conditions is obtained. Moreover, the dynamic stiffness and damping characteristics under different errors are also studied. Findings The roundness error will decrease the load capacity and friction torque...

...Hongyang Hu; Ming Feng; Tianming Ren Purpose This paper aims to improve the load capacity of gas foil thrust bearing (GFTB) and to introduce and study a novel bearing with stacked bump foils. Design/methodology/approach For the proposed novel GFTB supported by stacked foils, some bump-type...

...Ming Feng; Hongyang Hu; Tianming Ren Purpose To improve the load capacity and stability of gas foil journal bearings (GFJB), this paper aims to propose a novel GFJB with taper-grooved top foil. Design/methodology/approach A modified bump stiffness model is established considering rounding...

... that texture shape has a strong influence on the tribological characteristics such as load capacity and friction coefficient of the bearing. Slender texture improves the load capacity, but it has a negligible effect on the reduction of friction coefficient. In contrast, texture orientation is found...

... the convergence effect of the wedge region, increase the effective film pressure distribution area of the bearing and reduce the local concentrated load of the top foil, which is more conductive to the increase of load capacity. Originality/value The wedge shape parameters bring a fundamental difference...

... are optimized with maximum loading capacity as the objective. Findings The results show that the optimal height ratios are all within the range of 0.60-0.65 when textured parallel sliders are considered as rigid. After considering the effect of elastic deformation, loading capacity drops and is reduced more...

...Haniff Abdul Rahman; Jaharah A. Ghani; Wan Mohd Faizal Wan Mahmood; Mohammad Rasidi Mohammad Rasani Purpose This study aims to simulate the influence of surface texturing produced via turning process toward pressure distribution and load capacity generation using computational fluid dynamics (CFD...

... by using finite element method to reveal variation laws of the oil film load capacity and torque transmission during the starting process. Then, speed regulating start experiments were carried out to study the following performance of the output speed. Findings The results show that oil film thickness...

... National Research Foundation of Korea (NRF) 2017R1A2B2005515 Friction Journal bearing Load capacity (4) ∂ ∂ x ρ h 3 12 μ ∂ p ∂ x + ∂ ∂ y ρ h 3 12 μ ∂ p ∂ y = U 2 ∂ ( ρ h ) ∂ x where...

... bearing performance characteristics such as thermo-hydrodynamic oil film pressure, temperature, load capacity, Sommerfeld number and power loss characteristics across the bearing. The effect of ellipticity ratio on the bearing performance characteristics has also been obtained for both the elliptical...

...Zhiru Yang; Dongfeng Diao; Hongyan Fan; Xue Fan; Chao Wang Purpose – The purpose of this paper is to study the load capacity of nanoparticles-laden gas film (NLGF) in thrust bearing. Design/methodology/approach – SiO₂ nanoparticles were added into gas to form an NLGF...

.... Design/methodology/approach – The flow resistance network method is used to analyze the influences of load capacity and static stiffness of bearing with the design parameters, including the number of recesses, radial eccentricity ratio, axial displacement ratio, restriction constant, membrane...

... parameters of restrictors for the maximum stiffness can be obtained, the avoidance of negative stiffness is also provided. Q, Q¯=flow rate, dimensionless flow rate (dfr), Q¯=12μQ(P_sh₀3)−1 W, W¯=load capacity, dimensionless load capacity (dlc), W¯=W(P_sA)−1=P...

... Load capacity a=outer radius b=inner radius c₁=constant of integration p=pressure k=(b/a)=aspect ratio B=curvature parameter of the upper plate C=curvature parameter of the lower plate H=magnitude of the magnetic field P=−(h³p/πμh...

...Fangwei Xie; Youfu Hou Purpose The purpose of this paper is to reveal the characteristics of hydrodynamic load capacity and torque transferred by oil film with variable viscosity, and the effect of groove number, width and depth on the hydrodynamic load capacity and torque transfer. Design...