多种径向高压密封材料的性能测试与比较

PTFE

多种径向高压密封材料的性能测试与比较
Markus Henzler Werner Haas 沈洁斯图加特大学机械元件研究所,斯图加特70569

摘　要:采用间隙挤出实验和磨损实验，研究了几种高压转轴密封材料的抗间隙挤出性能和抗磨损性能。结果表明：PTFE复合材料的抗间隙挤出和抗变形性能较差，而聚酮和聚氨酯材料的较好；聚酮、超高分子聚乙烯、PTFE复合材料以及聚氨酯的耐磨性能均较好，但PTFE复合材料（PTFE聚合物复合材料除外），尤其是含青铜的PTFE复合材料，对相对旋转面的损伤严重；比较的几种密封材料中，超高分子聚乙烯具有最低的摩擦因数，但其耐高温能力最弱；聚氨酯的摩擦因数与PTFE复合材料处于同一级别。[著者文摘]

关键词:摩擦 磨损 旋转密封 聚四氟乙烯 聚氨酯 间隙挤出
分类号:　TB42[著者标引]文献标识码：A文章编号：0254-0150（2010）1-093-5栏目信息：开发应用
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Test and Comparison of a Variety of High-pressure Radial Sealing MaterialsMarkus Henzler Werner Haas Shen Jie Institute of Machine Components, University of Stuttgart, Stuttgart 70569, GermanAbstract:Abstract： Using gap-extrusion experiments and wear experiments, the anti-gap extrusion and antiwear properties of sev- eral high-pressure shaft seal materials were studied. The results show that the PTFE composites have poor resistance to gap extrusion and deformation performances, while poly-ketone and polyurethane materials show better performances; the poly- ketone, ultra-high molecular polyethylene, PTFE composite （PTFE polymer composites excluded）, particularly bronze PTFE composites, damage the opposite rotating sur- face badly; for the tested several sealing materials, ultra-high molecular polyethylene has the lowest friction coefficient, but the weakest high-temperature resistance performance ; the friction coefficients of polyurethane and the PTFE composites are at the same level.[著者文摘]

Key words:friction ; wear; rotary seal ; PTFE ; polyurethan ; gap extrusion