Investigation on the sealing performance of polymers at ultra high pressures

IF 1.1 4区 工程技术 Q4 ENGINEERING, CHEMICAL
Mevlüt Türköz, Dede Can Evcen
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引用次数: 1

Abstract

Abstract In this paper, the parameters affecting the sealing life of UHMWPE and PTFE in ultra high pressure systems were investigated. A life test system was designed and manufactured in which different parameters can be tested in the sealing construction. The life test system consists of two hydraulic pressure intensifiers, and a hydraulic and electronic control unit. The effects of the extrusion gap, piston rod material and surface roughness, in addition to the material, geometry and number of the sealing elements, on the life of the sealing members were investigated. Two levels were determined for each parameter, and experiments were carried out at a pressure of 450 MPa according to a Taguchi L8 orthogonal experimental design. Pressure intensifiers were operated reciprocatively, thus allowing to perform two tests simultaneously, saving time. Working cycles of the pressure intensifiers were measured. Each experiment continued until the seals were damaged, and a critical leakage rate occurred at the pressure intensifiers. ANOVA was applied to the experimental results. According to the results, the most significant parameter affecting the sealing life is the extrusion gap with a rate of 77%, followed by the piston rod surface roughness with a rate of 13%, and the piston rod material with a rate of 4%. The effects of the remaining parameters on the sealing life are more limited. The results obtained will contribute to the industrial design of sealing structures for ultra-high pressures.
超高压下聚合物密封性能的研究
摘要研究了超高分子量聚乙烯(UHMWPE)和聚四氟乙烯(PTFE)在超高压系统中密封寿命的影响参数。设计并制作了一套寿命试验系统,可对密封结构中的不同参数进行寿命试验。寿命试验系统由两个液压增强器和一个液压电控单元组成。研究了挤压间隙、活塞杆材料和表面粗糙度以及密封元件的材料、几何形状和数量对密封元件寿命的影响。每个参数确定两个水平,在450 MPa压力下,按照田口L8正交实验设计进行实验。压力增强器是双向操作的,因此可以同时进行两次测试,节省了时间。测量了增压剂的工作周期。每次实验都继续进行,直到密封被破坏,并且在压力增强器处出现临界泄漏率。对实验结果进行方差分析。结果表明,影响密封寿命最显著的参数是挤压间隙,其影响率为77%,其次是活塞杆表面粗糙度,影响率为13%,活塞杆材料影响率为4%。其余参数对密封寿命的影响较为有限。所得结果将有助于超高压密封结构的工业设计。
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来源期刊
International Polymer Processing
International Polymer Processing 工程技术-高分子科学
CiteScore
2.20
自引率
7.70%
发文量
62
审稿时长
6 months
期刊介绍: International Polymer Processing offers original research contributions, invited review papers and recent technological developments in processing thermoplastics, thermosets, elastomers and fibers as well as polymer reaction engineering. For more than 25 years International Polymer Processing, the journal of the Polymer Processing Society, provides strictly peer-reviewed, high-quality articles and rapid communications from the leading experts around the world.
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