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Research Papers

Analysis of Thermal Characteristic of Spur/Helical Gear Transmission

[+] Author and Article Information
Wei Li, Pengfei Zhai

School of Mechanical Engineering,
University of Science and Technology Beijing,
30 Xueyuan Road,
Haidian District, Beijing 100083, China
e-mail: liwei@me.ustb.edu.cn

Lei Ding

School of Mechanical Engineering,
University of Science and Technology Beijing,
30 Xueyuan Road,
Haidian District, Beijing 100083, China

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received May 23, 2018; final manuscript received September 18, 2018; published online October 26, 2018. Assoc. Editor: Aaron P. Wemhoff.

J. Thermal Sci. Eng. Appl 11(2), 021003 (Oct 26, 2018) (13 pages) Paper No: TSEA-18-1267; doi: 10.1115/1.4041597 History: Received May 23, 2018; Revised September 18, 2018

Gear drives are widely used in mechanical driving devices, and the heating problem of gear has been paid much attention. The tooth surface temperature field of spur/helical gear is compared and thermal characteristic of spur/helical gear is studied in this paper. The calculation formula of frictional heat flux and convective heat transfer coefficient, which considers different surfaces of gear tooth, is derived. The frictional heat flux of the helical gear is different from that of the spur gear, and the calculation method is different. The finite element parametric model for thermal analysis is built and it realizes the automatic parametric modeling, loading, and generation of temperature field by ANSYS parametric design language (APDL) program. The influence of different parameters on gear temperature rise is analyzed and the distribution of the three-dimensional (3D) temperature field of spur/helical is obtained. The simulation analysis and experiment are compared to validate the accuracy of thermal analysis results. The research result reveals the distribution law of the 3D temperature field of spur/helical gear transmission at different working parameters. It provides theoretical guidance for gear antiscuffing capability and gear optimization design.

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Figures

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Fig. 2

The absolute velocity and the relative velocity

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Fig. 3

The average frictional heat flux of spur gear

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Fig. 4

The average frictional heat flux of spur helical gear

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Fig. 1

The model of relative sliding velocity

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Fig. 7

Heat conduction model of the 3D element

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Fig. 5

The mesh of gear tooth: (a) coarse, (b) medium, (c) fine, and (d) hyperfine

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Fig. 6

Their temperature fields of gear tooth under different mesh quality: (a) coarse mesh, (b) medium mesh, (c) fine mesh, and (d) hyperfine mesh

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Fig. 8

The boundary conditions of finite element model

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Fig. 14

The 3D temperature distribution under different load: (a) P = 50 kw, (b) P = 75 kw, and (c) P = 100 kw

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Fig. 15

The temperature equivalent map of the spur gear under different load: (a) P = 50 kw, (b) P = 75 kw, and (c) P = 100 kw

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Fig. 16

The temperature field of the helical gear under different load: (a) P = 50 kw, (b) P = 75 kw, and (c) P = 100 kw

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Fig. 17

The 3D temperature distribution under different load: (a) P = 50 kw, (b) P = 75 kw, (c) P = 100 kw

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Fig. 18

The temperature equivalent map of the helical gear under different load: (a) P = 50 kw, (b) P = 75 kw, and (c) P = 100 kw

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Fig. 19

Gear temperature measurement test bench

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Fig. 21

The structure of the modified test bench: (a) 3D graph and (b) physical map

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Fig. 20

Gear temperature measurement test bench schematic diagram

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Fig. 9

The temperature field of the spur gear

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Fig. 10

The tooth surface temperature distribution of the spur gear

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Fig. 11

The temperature field of the helical gear

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Fig. 12

The tooth surface temperature distribution of the helical gear

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Fig. 13

The temperature field of the spur gear under different load: (a) P = 50 kw, (b) P = 75 kw, and (c) P = 100 kw

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Fig. 22

The temperature field distribution in heat balance state under fourth level load: (a) the temperature distribution in the meshing area and (b) the normal photo of the same location of the system

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Fig. 23

Measuring point of tooth surface temperature

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Fig. 24

Finite element results of temperature field of experimental gear: (a) the first level load, (b) the second level load, (c) the third level load, and (d) the fourth level load

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Fig. 25

Comparison between experimental results and finite element results

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