Fracture Reasons and Improvements for the Running Gear of Shearers

Abstract:

Running traction mechanism of shearers is adopted as the analysis object in this paper. The finite element models for the elastic contact analysis between the running gears and pin-rails are created. When the gears are running, the variation principles of contact spots, contact force, and internal stress for the gears and pin-rails at the different contact positions are analyzed. The calculation results show that the maximum stress is located at the edges of the gear teeth for the different contact positions. When the teeth are loaded with the repeated large stress, cracks are produced at the tooth edges at first and then are growing. The tooth breakage is produced at last. Gear chamfers using two circulars at the tooth edges can change the location of the maximum stress and the maximum MISES stress can be reduced by 20% or more. Therefore, the fracture problem of gear teeth is solved basically.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 2733-2737
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.2733
• Online since: March 2012
• Authors: Chun Yu Song, Jing Ru Liu, Xiu Juan Zhang
• Keywords: Contact, Finite Element Analysis (FEA), Gear, Pin-Rail

References

[1] Weidong Geng: Colliery Mechanical & Electrical Technology Vol. 5(2000), P. 81-84, in Chinese.

[2] Guoan Wang: Coal Mine Machinery Vol. 3(1993), P. 8-12, in Chinese.

[3] Jun Zhang: Colliery Mechanical & Electrical Technology Vol. 2(2006), P. 39-43, in Chinese.

[4] L.D. Mmaclennan: Journal of Mechanical Engineering Science Vol. 216(2002), P. 1005-1016.

[5] Zhansheng Liu: Coal Mine Machinery Vol. 7(2007), pp.30-32, in Chinese.

[6] J. Wang and I. Howard. The torsional stiffness of involute spur-gears, In Proc. Instn Mech. Engrs, Part C: J. Mechanical Engineering Science, 3 (2004) 131-142.

DOI: 10.1243/095440604322787009