Results 81 to 90 of about 130 (116)
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A new type of aerostatic thrust bearing with high stiffness
International Technology and Innovation Conference 2006 (ITIC 2006), 2006The precision and ultraprecision machinery requires increasing the stiffness of aerostatic bearing. In this paper, a new type of aerostatic thrust bearing with high stiffness is presented. The principle of the new bearing is studied. The air pressure reaction in the bearing gap on load makes annular membrane elastically deform.
null Zhang Junan +2 more
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A semianalytical method for studying the performances of aerostatic thrust bearing
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2018The solution of Reynolds equation and computational fluid dynamics are widely employed for the lubrication performance analysis of aerostatic thrust bearing. However, the solution of Reynolds equation may be inaccurate and cannot present detailed performance near orifice, while computational fluid dynamics method has low computational efficiency with ...
Jianbo Zhang +4 more
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Dynamic behaviour of aerostatic rectangular thrust bearings
Wear, 1980Abstract A theoretical study to determine the dynamic stiffness and damping characteristics of an aerostatic rectangular thrust bearing is presented. The governing non-linear partial differential equation of film pressure is linearized using a first-order perturbation method.
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Design of an Aerostatic Thrust Bearing with Pressure-equalizing Grooves
Robot, 2012To solve the problem in the space robot's microgravity simulation experiment that lateral interference force/moment exists and the workbench is uneven,a high load capacity,high stiffness round aerostatic thrust bearing with circumferential and radial pressure-equalizing grooves is designed and manufactured,and its load capacity is modeled and ...
Yongke FENG +4 more
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Static characteristics of aerostatic porous rectangular thrust bearings
Wear, 1982Abstract A theoretical analysis of the steady state performance of aerostatic rectangular thrust bearings with porous pads is presented. The equations governing the gas flow through the porous pad and the bearing clearance are solved simultaneously using a finite-difference method to obtain the pressure distribution in the bearing clearance. The load
K.C. Singh, N.S. Rao
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Actively compensated aerostatic thrust bearing: design, modelling and experimental validation
Meccanica, 2017Active compensation is an effective method for increasing air bearing static and dynamic performance. This paper describes the design, modelling and experimental validation of an actively compensated externally pressurized gas bearing. The active compensation is obtained through the support compensation strategy.
COLOMBO, FEDERICO +3 more
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Pneumatic hammer in aerostatic thrust bearings with single orifice compensation
SPIE Proceedings, 2013In dealing with the phenomenon of the pneumatic hammer in aerostatic thrust bearings, the vibrant model of the one-single freedom system has been established to study the pneumatic hammer from the point of sympathetic vibration. It is found that the bearings show a tendency to result in the pneumatic hammer with the increase of air supply pressure, and
Zhongke Kong, Jizhong Tao
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Optimum Design of Inherently Compensated Aerostatic Thrust Bearings
1999This paper describes an optimisation method that can facilitate the design of aerostatic thrust bearings in various applications. In this contribution, the optimisation problem is formulated so as to maximise the static stiffness of bearings subject to load carrying capacity and damping requirements. Four design parameters, namely, feeding hole radius,
Hua-Chih Huang +2 more
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A Design Methodology for Obtaining Infinite Stiffness in an Aerostatic Thrust Bearing
Journal of Mechanisms, Transmissions, and Automation in Design, 1986The desire to maintain high positional accuracy has led to many unique bearing designs which achieve high, and even infinite, stiffness. This paper presents a design procedure for an aerostatic thrust bearing and demonstrates that infinite stiffness may be attained by proper selection of the bearing’s geometric parameters.
Michael R. Bryant +3 more
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Dynamic Characteristics of Aerostatic Thrust Bearings with Porous Inserts
Journal of Mechanical Engineering Science, 1980A first-order perturbation method is adopted to find the dynamic behaviour of an aerostatic circular thrust bearing having a central porous insert as a restrictor. The linearized gas film stiffness and damping are derived and used to study their behaviour with other design variables.
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