金属间隙密封气缸寿命试验研究

发布时间：2018-06-29 15:49

本文选题：金属间隙密封气缸 + 寿命试验　；参考：《南京理工大学》2011年硕士论文

【摘要】：金属间隙密封气缸作为一种新型的低摩擦气缸,具有低摩擦、高速和高频率运行等特点,广泛应用于传送精密零件、切割镜片等对压力反应灵敏及要求高频高速的工业自动化环境中。但是由于金属间隙密封气缸是一种新型气缸,没有进行相应的寿命试验及失效模式方面的试验研究,这些方面数据的欠缺直接影响这种新型气缸在重要场合的应用。因此,对其展开寿命和失效模式方面的研究是非常必要和迫切的。但是,由于金属间隙密封气缸的结构特殊性,过去的橡胶密封气缸试验规范的有关规定不能照搬,因此有必要结合寿命试验对规范中的失效临界值进行深入研究。论文针对金属密封气缸的寿命和失效模式进行了深入的试验研究,获得了以下几个方面的结果。 (1)针对金属间隙密封气缸的特点,参照ISO国际标准中气缸寿命试验的规范,提出了金属间隙密封气缸寿命试验的基本环境条件,并构建了用于金属间隙密封气缸寿命试验的试验系统。 (2)进行了金属间隙密封气缸的寿命试验。经历了6个多月2500多万次的持续运行试验和数据采集工作,获得了大量的试验数据。通过深入的数据分析并考虑到金属间隙密封气缸的结构特点和工作特点,基于试验数据得出了金属间隙密封气缸失效判定的临界值不能采用现有国际标准规定值的重要结论,在此基础上提出了金属间隙密封气缸寿命试验泄漏量、最小工作压力和行程时间的失效临界值。 (3)根据本文提出的失效临界值,对试验气缸进行了失效分析。同时,进行了被试气缸的寿命计算,得到其特征寿命为1.6192x 107次全行程。在此基础上对被试气缸进行了结构分解和磨损部位检查,查找了试验气缸失效的模式和影响气缸寿命的主要因素。分析表明：金属间隙密封气缸的主要失效因素在于气缸滚珠导向机构的磨损及气缸润滑状态的劣化。
[Abstract]:As a new type of low friction cylinder, metal clearance seal cylinder has the characteristics of low friction, high speed and high frequency. Cutting lenses are sensitive to pressure and require high-frequency and high-speed industrial automation. However, because the metal clearance seal cylinder is a new type of cylinder, the corresponding life test and failure mode test are not carried out. The lack of data in these aspects directly affects the application of this new type cylinder in important situations. Therefore, it is very necessary and urgent to study its spreading life and failure mode. However, because of the structural particularity of the metal clearance seal cylinder, the relevant provisions of the previous rubber seal cylinder test code can not be copied, so it is necessary to study the failure critical value of the code in combination with the life test. In this paper, the life and failure modes of metal seal cylinder are studied, and the following results are obtained. (1) according to the characteristics of metal clearance seal cylinder, Referring to the standard of cylinder life test in ISO international standard, the basic environmental conditions for life test of metal clearance seal cylinder are put forward. The life test system of metal clearance seal cylinder is constructed. (2) the life test of metal clearance seal cylinder is carried out. After more than 25 million continuous operation tests and data acquisition in more than 6 months, a large number of experimental data were obtained. Through in-depth data analysis and considering the structural and working characteristics of the metal clearance seal cylinder, based on the test data, it is concluded that the critical value of the metal clearance seal cylinder failure can not be determined by the existing international standard. On this basis, the critical values of leakage, minimum working pressure and travel time of the metal clearance seal cylinder are proposed. (3) according to the failure critical value proposed in this paper, the failure analysis of the test cylinder is carried out. At the same time, the life of the tested cylinder is calculated, and the characteristic life of the cylinder is 1.619x 107 full stroke. On this basis, the structural decomposition and wear site of the tested cylinder were examined, and the failure mode of the test cylinder and the main factors affecting the cylinder life were found out. The analysis shows that the main failure factors of the metal clearance seal cylinder are the wear of the ball guide mechanism and the deterioration of the lubrication state of the cylinder.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH138.51

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