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Research Papers

Research on Thermal Characteristics of Spindle System With Tilting Pad Bearing

[+] Author and Article Information
Shuyun Jiang

Professor
School of Mechanical Engineering,
Southeast University,
2 Southeast Road,
Jiangning District,
Nanjing 211189, China
e-mail: jiangshy@seu.edu.cn

Deyang Shen

School of Mechanical Engineering,
Southeast University,
2 Southeast Road,
Jiangning District,
Nanjing 211189, China

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received March 27, 2017; final manuscript received February 27, 2018; published online May 21, 2018. Assoc. Editor: Ting Wang.

J. Thermal Sci. Eng. Appl 10(5), 051005 (May 21, 2018) (11 pages) Paper No: TSEA-17-1091; doi: 10.1115/1.4039922 History: Received March 27, 2017; Revised February 27, 2018

Spindles with tilting pad bearings have been widely applied in machine tools due to their high running precision. However, friction power loss will increase dramatically when the bearing runs at a higher speed. So far, little research on the thermal modeling of spindle systems with tilting pad bearings can be found in literature. In this paper, based on the Newtonian law of viscosity, formula that describes the friction power loss of the tilting pad bearing has been derived. The thermodynamic equilibrium equation for the spindle lubrication system has been established. Thermal boundary condition of the spindle system has been obtained using the heat transfer theory. Thermal model of the spindle system with tilting pad bearing has been built with the finite element method in order to calculate its temperature and thermal displacement distribution. Effects of the eccentricity ratio and the lubricant flow rate on thermodynamic behavior of the spindle system have been studied systematically. Finally, experiments have been conducted to verify the proposed thermal model for the spindle system with tilting pad bearing.

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References

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Yu, S. , and Chen, S. , 2012, “An Approach Searching for the Steady-State Equilibrium Position of Tilting-Pad Journal Bearing for Supporting Motorized Spindle,” J. Comput. Theor. Nanosci., 9(10), pp. 1710–1714. [CrossRef]
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Figures

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Fig. 1

A schematic of the spindle system with tilting pad bearings

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Fig. 2

A schematic of thrust bush with eight oil wedges

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Fig. 3

Power flow model for the spindle system

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Fig. 4

A schematic of the tilting pad bearing

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Fig. 5

Schematic of one platform of thrust bearing pad

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Fig. 6

The finite element model of spindle system

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Fig. 7

Joints of the spindle system with tilting pad bearing

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Fig. 8

Steady-state temperature distribution of the spindle system

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Fig. 9

Thermal displacement distribution of the spindle system

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Fig. 10

The experiment setup for the thermal behavior of the spindle system: (a) schematic view of test system, (b) temperature test, and (c) thermal deformation test

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Fig. 11

The maximum temperature rise of the spindle end

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Fig. 12

Schematic view of the tilting pad bearing with eccentricity

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Fig. 13

Effect of eccentricity ratio on the film temperature of tilting pad bearing: (a) e/δ = 0, (b) e/δ = 0.2, (c)e/δ = 0.4, (d) e/δ = 0.6, and (e) e/δ = 0.8

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Fig. 14

Effect of eccentricity ratio on the temperature rise of oil in tilting pad bearing housing

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Fig. 15

Effect of lubricant flow rate on the thermal behavior of the tilting pad bearing: (a) oil temperature rise in the bearing housing and (b) friction power loss of the tilting pad bearing

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