深海活塞压力平衡器组合密封结构设计与分析
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摘要
活塞往复动密封是活塞压力平衡器核心部件,传统活塞往复密封在深海大压力下容易出现爬行、泄漏等现象。基于传统油压往复密封理论,提出一种新型串联式组合往复动密封结构,该结构以矩形直通式迷宫密封为前置密封,以星形密封圈为主密封。通过有限元分析验证迷宫密封对流体压力耗散作用,并确定出星形圈初始压缩率。研究表明:迷宫密封对流体压力具有明显耗散作用,可为主密封创造有利的密封条件;主密封接触应力大于静水压力,结合密封判定条件,可判定新型组合密封整体性能满足设计要求。
Piston reciprocating dynamic seal is the core component of the piston pressure balancer. The traditional piston reciprocating seal is prone to crawling and leaking under deep sea pressure. Based on the traditional theory of hydraulic reciprocating sealing, a new type of tandem type combined reciprocating dynamic sealing structure was proposed,which uses rectangular straight-through labyrinth seal as front seal and star seal as main seal.The effect of the labyrinth seal on the dissipation of fluid pressure was verified by finite element analysis and the initial compression rate of the star circle was determined. The study shows that the labyrinth seal has a significant dissipation effect on the fluid pressure and can create a favorable sealing condition for the main seal.The contact stress of the main seal is greater than the hydrostatic pressure,combined with the sealing judgment conditions,the overall performance of the new combination seal can be judged to meet the design requirements.
Piston reciprocating dynamic seal is the core component of the piston pressure balancer. The traditional piston reciprocating seal is prone to crawling and leaking under deep sea pressure. Based on the traditional theory of hydraulic reciprocating sealing, a new type of tandem type combined reciprocating dynamic sealing structure was proposed,which uses rectangular straight-through labyrinth seal as front seal and star seal as main seal.The effect of the labyrinth seal on the dissipation of fluid pressure was verified by finite element analysis and the initial compression rate of the star circle was determined. The study shows that the labyrinth seal has a significant dissipation effect on the fluid pressure and can create a favorable sealing condition for the main seal.The contact stress of the main seal is greater than the hydrostatic pressure,combined with the sealing judgment conditions,the overall performance of the new combination seal can be judged to meet the design requirements.
引文
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[9]谭晶,杨为民,丁玉梅,等.滑环式组合密封件的研究(I):方形同轴密封件(格来圈)的分析[J].润滑与密封,2007,32(1):53-55.TAN J,YANG W M,DING Y M,et al.The Study of a sliding ring combined seal ring(I):the analysis of rectangle co-axial seal[J].Lubrication Engineering,2007,32(1):53-55.
[10]张云启.深海活塞式压力平衡装置密封结构的研究[D].合肥:合肥工业大学,2014.
[11]赵子良.伺服液压缸密封特性及摩擦力影响的仿真研究[D].河北:燕山大学,2014.
[12]韩传军,张杰,黄冈.往复密封中星封圈的密封性能分析[J].润滑与密封,2012,37(9):28-32.HAN C J,ZHANG J,HUANG G.Seal performance analysis of a star sealing ring in reciprocating seal[J].Lubrication Engineering,2012,37(9):28-32.
[13]李静明,许贤良,张立祥.液压缸活塞上的O形密封设计[J].煤矿机械,2010,31(1):13-16.LI J M,XU X L,ZHANG L X.Hydraulic cylinder piston O-ring seal design[J].Coal Mine Machinery,2010,31(1):13-16.
[14]莫丽,王军,王小磊.轴用Yx形密封圈动密封的特性的有限元分析[J].润滑与密封,2014,39(5):6-12.MO L,WANG J,WANG X L.Finite element analysis of dynamic sealing characteristics of the Yx-ring for rod seal[J].Lubrication Engineering,2014,39(5):6-12.
[2]刘桓龙,张毅,王国志,等.O形圈在深海环境下往复密封应力分析[J].机床与液压,2015,43(13):116-119.LIU H L,ZHANG Y,WANG G Z,et al.Anaylsis of the reciprocating seal stress of O-ring under deep-sea environment[J].Machine Tool & Hydraulics,2015,43(13):116-119.
[3]张毅.深海油压动力源密封技术研究[D].成都:西南交通大学,2012.
[4]刘涌.活塞组合密封设计及其在水下压力传感器中的应用研究[D].合肥:合肥工业大学,2016.
[5]周旭,殷参,赵健,等.水压往复柱塞泵新型密封结构设计与分析[J].液压与气动,2017(5):56-61.ZHOU X,YIN C,ZHAO J,et al.New type sealing structure design for hydraulic reciprocating plunger pump[J].Chinese Hydraulics & Pneumatics,2017(5):56-61.
[6]吴晓明,赵子良,郑树伟,等.活塞杆非接触密封在伺服液压缸中的应用及其对系统低速稳定性的影响[J].机床与液压,2015,43(13):71-74.WU X M,ZHAO Z L,ZHENG S W,et al.Use of non-contact seal in servo cylinder and its influence on low speed stability of hydraulic system[J].Machine Tool & Hydraulics,2015,43(13):71-74.
[7]周博,陈家旺,顾临怡.深海高压环境下的密封材料变形特性分析[J].中国机械工程,2010,21(12):1481-1484.ZHOU B,CHEN J W,GU L Y.Analysis on self-compressibility of sealing materials under high pressurein deep-sea[J].China Mechanical Engineering,2010,21(12):1481-1484.
[8]陈国强,陶友瑞.高压水介质往复密封接触特性有限元分析[J].润滑与密封,2015,40(5):42-46.CHEN G Q,TAO Y R.Finite element analysis of contact characteristics of reciprocating seal structure under high-pressure water medium[J].Lubrication Engineering,2015,40(5):42-46.
[9]谭晶,杨为民,丁玉梅,等.滑环式组合密封件的研究(I):方形同轴密封件(格来圈)的分析[J].润滑与密封,2007,32(1):53-55.TAN J,YANG W M,DING Y M,et al.The Study of a sliding ring combined seal ring(I):the analysis of rectangle co-axial seal[J].Lubrication Engineering,2007,32(1):53-55.
[10]张云启.深海活塞式压力平衡装置密封结构的研究[D].合肥:合肥工业大学,2014.
[11]赵子良.伺服液压缸密封特性及摩擦力影响的仿真研究[D].河北:燕山大学,2014.
[12]韩传军,张杰,黄冈.往复密封中星封圈的密封性能分析[J].润滑与密封,2012,37(9):28-32.HAN C J,ZHANG J,HUANG G.Seal performance analysis of a star sealing ring in reciprocating seal[J].Lubrication Engineering,2012,37(9):28-32.
[13]李静明,许贤良,张立祥.液压缸活塞上的O形密封设计[J].煤矿机械,2010,31(1):13-16.LI J M,XU X L,ZHANG L X.Hydraulic cylinder piston O-ring seal design[J].Coal Mine Machinery,2010,31(1):13-16.
[14]莫丽,王军,王小磊.轴用Yx形密封圈动密封的特性的有限元分析[J].润滑与密封,2014,39(5):6-12.MO L,WANG J,WANG X L.Finite element analysis of dynamic sealing characteristics of the Yx-ring for rod seal[J].Lubrication Engineering,2014,39(5):6-12.