Sealing performance and mechanical response of mud pump piston
Jie Zhang,
Wenjie Jiang,
Pai Zhu,
Ting Zheng
Affiliations
Jie Zhang
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, China; Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Chengdu, 610500, China; Corresponding author.
Wenjie Jiang
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, China; Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Chengdu, 610500, China
Pai Zhu
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, China; Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province, Chengdu, 610500, China
Ting Zheng
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, China; Luzhou Vocational and Technical College, Luzhou, 646000, China
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.
