Journal ArticleDOI
Oil film shape prediction of hydrostatic thrust bearing under the condition of high speed and heavy load
TLDR
In this paper, the shape of gap oil film was predicted by solving the deformation of the friction pairs in hydrostatic bearing by using the computation of hydrodynamics, elasticity theory, finite element method and fluid-thermal-mechanical coupled method.Abstract:
Purpose
Hydrostatic thrust bearing is a key component of the vertical CNC machining equipment, and often results in friction failure under the working condition of high speed and heavy load. The lubricating oil film becomes thin or breaks because of high speed and heavy load and it affects the high precision and stable operation of the vertical CNC machining equipment; hence, it is an effective way of avoiding friction failure for achieving the oil film shape prediction
Design/methodology/approach
For the hydrostatic thrust bearing with double rectangular cavities, researchers solve the deformation of the friction pairs in hydrostatic bearing by using the computation of hydrodynamics, elasticity theory, finite element method and fluid-thermal-mechanical coupled method. The deformation includes heat deformation and elasticity deformation, the shape of gap oil film is got according to the deformation of the friction pairs in hydrostatic bearing, and gets the shape of gap oil film, and determines the influencing factors and laws of the oil film shape, and achieves the prediction of oil film shape, and ascertains the mechanism of friction failure. An experimental verification is carried out.
Findings
Results show that the deformation of the rotational workbench is upturned along its radial direction under the working condition of high speed and heavy load. However, the deformation of the base is downturned along its radial direction and the deformation law of the gap oil film along the radius direction is estimated; the outer diameter is close but the inner diameter is divergent wedge.
Originality/value
The conclusion can provide a theoretical basis for the oil film control of hydrostatic thrust bearing and improve the stability of vertical CNC machining equipment.read more
Citations
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Journal ArticleDOI
A review of the design and optimization of large-scale hydrostatic bearing systems
TL;DR: This review offers a comprehensive summary of potential problems and possible solutions in the large-scale hydrostatic bearing design, and simultaneously serves as a supporting material to overcome potential obstacles that might emerge during manufacturing, assembly, and service.
Journal ArticleDOI
Experimental research on a hydrodynamic thrust bearing with hydrostatic lift pockets: Influence of lubrication modes on bearing performance
TL;DR: In this paper , the performance of a thrust bearing equipped with hydrostatic lift pockets under different lubrication modes was investigated, and the results confirmed that the load-carrying capacity of the flat land bearing is poor and the introduction of hydrostatic lubrication improves its performance.
Journal ArticleDOI
Experimental research on a hydrodynamic thrust bearing with hydrostatic lift pockets: Influence of lubrication modes on bearing performance
TL;DR: In this paper, the performance of a thrust bearing equipped with hydrostatic lift pockets under different lubrication modes was investigated, and the results confirmed that the load-carrying capacity of the flat land bearing is poor and the introduction of hydrostatic lubrication improves its performance.
Journal ArticleDOI
Deformation characteristics of adaptive hydrostatic thrust bearing under extreme working conditions
Xiaodong Yu,Wang Fakun,Defan Zhou,Huang Dianbin,Zhan Shiwei,Mubing Yu,Jianhua Jiao,Junfeng Wang +7 more
TL;DR: In this paper, the authors investigated the deformation characteristics of adaptive hydrostatic thrust bearing under extreme working conditions, considering the relationship between viscosity and temperature of lubricating oil.
References
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Journal ArticleDOI
Feasibility of influencing the dynamic fluid film coefficients of a multirecess journal bearing by means of active hybrid lubrication
TL;DR: In this paper, the feasibility of influencing the dynamic fluid film coefficients (stiffness and damping) by means of a controllable fluid injection into opposed bearing recesses is investigated.
Journal ArticleDOI
Thin oil-film thickness distribution measurement using ultrasonic arrays
Jie Zhang,Bruce W. Drinkwater +1 more
TL;DR: In this article, an approach for calculating the oil-film thickness distribution in machine elements using an ultrasonic array, based on the measurement of normal and oblique incidence reflection coefficients, is described.