文章基本信息

标题：Enhancement of seal life through carbon composite back-up rings under shock loading conditions in defence applications
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作者：Shankar Bhaumik ; A. Kumaraswamy , , , [email protected] ; S. Guruprasad 等
期刊名称：Defence Technology
印刷版ISSN：2214-9147
出版年度：2016
卷号：12
期号：1
页码：39-45
DOI：10.1016/j.dt.2015.08.003
出版社：Elsevier B.V.
摘要：Abstract The life of Nitrile Butadiene Rubber (NBR) O-ring seal having shore hardness of A70 and A90 under shock loading conditions was investigated by a specially designed pneumo-hydraulic shock test rig. Shock tests have been carried out on bare seals, seal with conventional polytetrafluoroethylene (PTFE) back-up rings and seal with newly developed carbon composite back-up rings to study its behaviour under different operating conditions until failure. Experiments were conducted by varying annular gap ranging from 0.3 to 0.5 mm, oil temperature from 30 °C to 70 °C and rate of pressure rise from 600 to 2400 MPa/s. Significant enhancement in seal life was observed with carbon composite back-up ring at reduced annular clearances compared to seal life with conventional PTFE back-up ring and without back-up rings.
关键词：Hydraulic seal; O; rings; Shock load; Seal extrusion; Pneumo; hydraulic shock absorber; Back; up rings