反渗透隔膜增压泵隔膜寿命的研究
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摘要
针对净水机中反渗透隔膜增压泵隔膜寿命短的问题,运用UG软件对隔膜的受力情况进行流固耦合分析,研究隔膜发生破裂的位置及原因。结果表明,隔膜发生破裂的位置位于小腔体内的圆角边界处,隔膜发生破裂的原因之一是节点应力过大。影响隔膜节点最大位移量的是强迫位移值,与流体静压力关系不大;隔膜节点最大位移量与强迫位移成线性关系,比值为1.092;隔膜节点最大应力值与强迫位移也近似线性关系。
In view of the short life of the reverse osmosis diaphragm booster pump diaphragm in water purifier, this paper uses UG software to conduct fluid-structure coupling analysis on the force of the diaphragm to study the location and causes of the diaphragm rupture. The results show that cracks at the fillet boundary in the small cavity of the diaphragm, and one of the reasons for causing cracks is that the nodal stress is too large. The maximum displacement of the diaphragm node is influenced by the forced displacement value and has little relationship with the hydrostatic pressure; the maximum displacement of the diaphragm node is linearly related to the forced displacement,and the ratio is 1.092; the maximum stress value and forced displacement of the diaphragm node are also approximately linear.
In view of the short life of the reverse osmosis diaphragm booster pump diaphragm in water purifier, this paper uses UG software to conduct fluid-structure coupling analysis on the force of the diaphragm to study the location and causes of the diaphragm rupture. The results show that cracks at the fillet boundary in the small cavity of the diaphragm, and one of the reasons for causing cracks is that the nodal stress is too large. The maximum displacement of the diaphragm node is influenced by the forced displacement value and has little relationship with the hydrostatic pressure; the maximum displacement of the diaphragm node is linearly related to the forced displacement,and the ratio is 1.092; the maximum stress value and forced displacement of the diaphragm node are also approximately linear.
引文
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[2]Lee B, Rivin E. Finite element analysis of load-deflection and creep characteristics of compressed rubber components for vibration control devices[J]. Journal of Mechanical Design, 1996, 118(3):328.
[3]Charlton D, Yang J. Review of methods to characterize rubber elastic behavior for use in finite element analysis[J]. Rubber Chemistry and Technology, 1994, 67(3):481-503.
[4]牛小明.活塞式隔膜泵故障原因分析及应对措施[J].天津冶金,2016(1):37-40,43.
[5]史婷,李海生,王建松,等.隔膜压缩机金属膜片层间接触力学行为的研究[J].流体机械,2016,44(10):14-18.
[6]王祺.液压隔膜泵结构创新及波纹管隔膜研究[D].杭州:浙江工业大学,2008.
[7]郑英臣.隔膜泵用U型隔膜的设计方法研究及结构优化[D].杭州:浙江工业大学,2009.
[8]王悦昶,刘莹,黄伟峰,等.过盈配合连接对核主泵机械密封性能影响的ANSYS分析[J].机械工程学报,2017,53(5):153-159.