Sealing performance and mechanical response of mud pump piston

Abstract

In order to explore the effect of piston cup structure on its sealing characteristics and mechanical properties, a numerical simulation model of the piston cup in the BW-160 mud pump was established. Effects of work load, friction coefficient and cup structure parameters on the sealing and mechanical properties of the piston were discussed under mud discharge condition. The results show that stress concentration on the root and lips of the cup is becoming more and more obvious with the working load increases. The average contact pressure increases with the friction coefficient increases, but an excessive friction coefficient accelerate the wear of the cup and the heat generation. Effect of the piston lip interference and thickness on the sealing performance of the cup is greater than that of the inner wall width. The piston with groove structure can effectively improve the sealing performance of the piston. The mechanical properties of triangular groove cup are better than that of semicircular and trapezoidal groove cup.

Keywords

Piston cup / Sealing performance / Mechanical property / Groove structure

Declaration of competing interest

The authors declared that they have no conflicts of interest to this work.

We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

Acknowledgment

This research work was supported by Luzhou City Science and Technology Planning Project (2018-GYF-6), Chengdu International Cooperation Project (2019-GH02-00072-HZ) and Open Project of the Key Laboratory of the Ministry of Emergency Management of Fire Emergency Rescue Equipment (2019XFZB15).

References

[1] Xiaomei Zhu, Zhiyi Zhang, Ben Li, et al., Research on the design and application of the piston structure of a new modular drilling mud pump, Technology Wind (4) (2017) 97-98.

[2] Xiaodong Zhu, Failure analysis and optimization measures of mud pump piston, Gansu Sci. Technol. 28 (23) (2012) 75-76.

[3] Weatherford/DMC, Introducing the all new DURAOISTON for triplex mud pump systems, Drill. Contract. (April,1980).

[4] Xirong Zhou, Shengshang Peng, Several new types of drilling pump pistons in the United States and Su, J. Southwest Pet. Inst. 10 (2) (1988) 87-95.

[5] Jie Ren, The current situation and prospects of wear resistance measures for mud pump sliding parts in my country, Oil Field Equipment (2) (1995) 11-14.

[6] Chenqing Wang, Study on the Sample of Sialon Ceramic Liner of Mud Pump, China University of Geosciences, Beijing), 2011.

[7] Lan Wang, Development of high-pressure mud pump piston for construction machinery, China Synth. Rubber Ind. 31 (6) (2010) 48-50.

[8] Southwest Petroleum Institute, Long-life Piston of Drilling Mud Pump, 1988. China, CN87204919.

[9] I. Etsion, L. Burstein, A model for mechanical seals with regular microsurface structure, Tribol. Trans. 39 (3) (1996) 677-683.

[10] I. Etsion, State of the art in laser surface texturing, J. Tribol. 127 (1) (2005) 248-253.

[11] Bo Wu, Cong Qian, Xi peng, Optimized design of internal engine piston skirt with bionic structure, Transactions of the Chinese Society of Agricultural Machinery (6) (2015) 287-293, 318. Transactions of the Chinese Society for Agricultural.

[12] Yiwen Sun, Shaofeng Ru, Cong Qian, Wear-life experiment of drilling mud pump piston with dimple-shaped bionic surface, Acta Pet. Sin. 38 (2) (2017) 234-240.

[13] Ru Shaofeng. Optimization Design of Mud Pump Piston Biomimetic Surface and Research on Wear-Resistance and Sealing[D]. Jilin University.

[14] Guifeng Zhao, Yuhong Ma, Yanmin Li, Jiarun Luo, Chang Du, Development of a modified Mooney-Rivlin constitutive model for rubber to investigate the effects of aging and marine corrosion on seismic isolated bearings, Earthq. Eng. Eng. Vib. 16 (4) (2017) 815-826.

[15] Chengye Fan, Zhuo Zhuang, Kezhi Huang, The Theoretical and finite element solutions of an interference problem of hyperelastic materials, Eng. Mech. (4) (2003) 15-18.