Theoretical research on mechanical property of rectangular oil pad in hydrostatic thrust bearing based on constant flow

Li, Xibing; Cheng, Tian Qi; Li, Ming; Li, Mingjian; Wu, Ruren; Wan, Yingsi

doi:10.1108/ilt-10-2015-0149

Cited by 6 publications

(8 citation statements)

References 8 publications

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“…The total flow of the lubricating oil flowing through a single rectangular oil pad is the sum of the flow of oil into eight areas (A-H) from the oil chamber and the flow that goes back to the returning oil slot. As such, the total flow Q of oil, which flows from a single oil chamber into the returning oil slot through the sealing side, may be derived as per the following formula according to the N–S equation (Li et al , 2016, 2017): …”

Section: Performance Analysis On the Hydrostatic Thrust Bearing Rectangular Oil Padmentioning

confidence: 99%

“…The bearing capacity reflects the weight of components and parts that can be fabricated by the equipment. The bearing capacity of a single oil pad W is specified as the sum of the bearing capacities on the sealing side and in the oil chamber (Li et al , 2016, 2017), which could be expressed as the following formula: …”

Section: Performance Analysis On the Hydrostatic Thrust Bearing Rectangular Oil Padmentioning

confidence: 99%

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Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad

Chen

et al. 2018

ILT

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Purpose The purpose of this paper is to examine the effect of application of a heat pipe in an aspect of hydrostatic thrust bearings on thermal balance and deformation and the role of this application in increasing the rotating speed of a workbench. Design/methodology/approach Numerical simulations of oil film temperature field, the temperature field and thermal deformation of the bearing’s workbench and base were performed by finite element analysis (FEA) software for both the traditional hydrostatic thrust bearings and the heat pipe ones. Findings Oil pad and workbench of the hydrostatic thrust bearings are fabricated with a heat pipe cooling structure, which can take away most of the heat generated by shearing of the oil film, control the temperature rise and thermal deformation of the hydrostatic thrust bearing effectively, avoid the dry friction phenomenon and finally improve the processing quality of equipment. Originality/value The heat pipe hydrostatic thrust bearings could control the temperature rise and thermal deformation of the hydrostatic thrust bearing effectively, avoid the dry friction phenomenon and improve the processing quality of equipment.

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Section: Performance Analysis On the Hydrostatic Thrust Bearing Rectangular Oil Padmentioning

confidence: 99%

Section: Performance Analysis On the Hydrostatic Thrust Bearing Rectangular Oil Padmentioning

confidence: 99%

Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad

Chen

et al. 2018

ILT

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“…Hydrostatic journal bearings are commonly used in ultra-precision machine tools due to their potential advantages, which include low friction coefficient, high load capacity and high damping (San Andrés and Tao, 2013; Bouzidane and Thomas, 2007; Sawicki et al , 1997; Li et al , 2016). As is widely known, the pressure of the hydrostatic bearings affects the load capacity.…”

Section: Introductionmentioning

confidence: 99%

A simplified analytical method for the pressure of tilt hydrostatic journal bearing

Mao

Liu

et al. 2018

ILT

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Purpose This paper aims to present a simplified method to predict the pressure of the recess, no matter whether the tilt center coincides with the geometric center of the hydrostatic journal bearings. Design/methodology/approach To validate the effectiveness of the presented model, computational fluid dynamics (CFD) method and experimental method are performed in this study. Findings By comparing the CFD results and the experimental results, the pressure of the recess is related to the tilt direction, the tilt center, the width of the land and the circumferential angle of the land. Originality/value The mathematic model requires equivalent resistance of land edge – tilt position, tilt direction, tilt angle and the thickness of oil film instead of any digital iteration. Furthermore, a novel experimental apparatus including a circular hydrostatic bearing called ball bearing is designed to study the tilt effect produced by manufacturing error and offset load force on the pressure of the recess.

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“…Due to the error averaging effect (Zhang et al, 2015;Xue et al, 2012;Wang et al, 2013;Zha et al, 2015) of pressured oil film on shaft and bearing bush geometric errors in hydrostatic bearings, high rotation accuracy can be obtained. They have varied applications in CNC machining equipments, precision measurement apparatus (Noguchi and Miyaguichu, 2003;Abele et al, 2010;Li et al, 2016) and nanometer resolution manufacturing system (Stout and Barrans, 2000). Usually, the geometric error of structural parts is a major factor which affects rotation accuracy.…”

Section: Introductionmentioning

confidence: 99%

Relationship between elliptical form error and rotation accuracy of hydrostatic journal bearing

Zha

Chen

Zhang

2017

ILT

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Purpose The form error of shaft and hole parts is inevitable because of the machining error caused by rotation error of tool axis in machine tools where the elliptical form error is the most common in shaft and bearing bush. The purpose of this paper is to present the relationship between the elliptical form error and rotation accuracy for hydrostatic journal bearing in precision spindle and rotation table. Design/methodology/approach An error averaging effect model of hydrostatic journal bearing is established by using Reynolds equation, pressure boundary conditions, flux continuity equation of the land and kinetic equation of shaft in hydrostatic journal bearing. The effects of shaft and bearing bush on rotation accuracy were analyzed quantitatively. Findings The results reveal that the effect of shaft elliptical form error on rotation accuracy was six times larger than bearing bush. Therefore, to improve the rotation accuracy of hydrostatic journal bearing in spindle or rotation table, the machining error of shaft should be controlled carefully. Originality/value An error averaging model is proposed to evaluate the effect of an elliptical form error on rotation accuracy of hydrostatic journal bearings, which solves the Reynolds equation, the flux continuity equation and the kinetic equation. The determination of form error parameters of shaft and bearing bush can be yielded from finding results of this study for precision design of hydrostatic journal bearings.

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Theoretical research on mechanical property of rectangular oil pad in hydrostatic thrust bearing based on constant flow

Cited by 6 publications

References 8 publications

Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad

Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad

A simplified analytical method for the pressure of tilt hydrostatic journal bearing

Relationship between elliptical form error and rotation accuracy of hydrostatic journal bearing

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