Reliability Analysis of Counterweight Cover-Type Explosion Door in Different Periods
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T E C H N I C A L A RT I C L E — P E E R - R E V I E W E D
Reliability Analysis of Counterweight Cover-Type Explosion Door in Different Periods Qin Qiang · Dong Yuge He Liangguo
· Ding Shuguang · Wang Hu ·
Submitted: 22 February 2020 / Accepted: 14 July 2020 © ASM International 2020
Abstract The results of FMECA are given for the counterweight cover-type explosion door based on its structure and working conditions. The results show that the asynchronized motion of the counterweight structure in the first generation of the counterweight cover-type explosion door results in some specific failures of the explosion door. To avoid the failure modes caused by the asynchronized motion of the counterweight structure, the counterweight structure of the first generation is improved, and the function of the synchronized loading and lifting of the second generation of the cover-type explosion door with synchronized counterweight is realized. However, some other failure modes, such as the failure of rubber seal and the freezing of condensed water should be taken into consideration to improve the reliability of the second generation. In this paper, many failure modes of the second generation are dealt with to obtain the third generation, including a completely different sealing methods which make the sealing more reliable and a drainage plate Q. Qiang Department of Mechanical Engineering, Hefei University, 99 Jinxiu Avenue, Hefei 230601, China e-mail: [email protected] D. Yuge (&) · D. Shuguang · W. Hu · H. Liangguo School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China e-mail: [email protected] D. Shuguang e-mail: [email protected] W. Hu e-mail: [email protected] H. Liangguo e-mail: [email protected]
introduced to reduce the possibility of the freezing of condensed water greatly. The RPN of FMECA of the third generation is reduced significantly, and its reliability is improved greatly. The analyses show that the third generation of the counterweight cover-type explosion door is reliable and has extremely high promotion and application value. Keywords Explosion door · Cover-type · Explosion cover · Synchronized motion · Counterweight · FMECA · Reliability · RPN · Stiffness · Drainage plate
Introduction An explosion door is one of the most important safety components of mine ventilation systems. Many countries have made specific regulations and requirements for the explosion door. Article 121 of China Coal Mine Safety Regulations stipulates that an explosion door should be installed at the outlet of the air outlet equipped with the main fan, and it should be inspected once every 6 months [1]. Article 124 stipulates that during the shutdown of the main ventilator, the explosion doors and the related ventilation doors must be opened in order to ventilate by using natural wind pressure if only one main ventilator is responsible for the ventilation of the whole mine [1]. The Mandatory Safety Standard for Underground Coal Mines in the USA stipulates that the main ventilator should be e
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