往复式气体压缩机活塞杆密封技术研究

发布时间：2018-01-07 10:19

本文关键词：往复式气体压缩机活塞杆密封技术研究　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：往复式气体压缩机是石油化工行业中的重要设备,对石化产品的生产有着重要的影响。在实际生产中,国产压缩机的活塞杆密封稳定性低,容易泄漏,频繁的停工维修显著影响了企业的正常生产。同时,气体的泄漏造成的安全损失也较为严重。因此,研究往复式压缩机的活塞杆密封技术,提高密封稳定性,对解决往复式压缩机的稳定、安全运行具有一定的工程应用价值。本文结合国内外活塞杆的密封技术分析了往复式压缩机的活塞杆填料密封结构及原理,结合常见的密封失效现象,研究活塞杆失效形式和机理、填料环失效形式和机理;对活塞杆的材料成份和表层硬度、填料环的材料成份通过试验,研究其与耐磨性能的关系;建立密封系统的计算模型,计算密封腔内摩擦热、生热率和对流换热系数,对新旧不同冷却结构的密封系统利用Ansys进行温度场分布的模拟,论证了通过冷却结构的改进,可以降低填料盒内的峰值温度,提高填料环耐磨寿命。通过对不同工况下的密封系统温度场的模拟,研究不同工况因素对温度场的影响规律;采用试验装置对不同压缩机转速、不同密封压力和冷却水流速情况下密封面的温度进行测试,并进行加速试验,测量试验后的密封副磨损深度,在一定程度上验证本文的研究理论。
[Abstract]:Reciprocating gas compressor is an important equipment in petrochemical industry, which has an important impact on the production of petrochemical products. In actual production, the piston rod seal stability of domestic compressor is low, easy to leak. Frequent shutdown and maintenance significantly affect the normal production of enterprises. At the same time, the safety loss caused by gas leakage is more serious. Therefore, the piston rod seal technology of reciprocating compressor is studied to improve the seal stability. This paper analyzes the structure and principle of piston rod packing seal of reciprocating compressor combined with the sealing technology of piston rod at home and abroad. Combined with the common sealing failure phenomenon, the failure form and mechanism of piston rod and packing ring are studied. The relationship between the material composition and the surface hardness of the piston rod and the material composition of the packing ring is studied. The calculation model of seal system is established, and the heat of friction, heat generation and convection heat transfer coefficient of seal cavity are calculated. The distribution of temperature field of seal system with new and old cooling structures is simulated by Ansys. Through the improvement of cooling structure, the peak temperature in the packing box can be reduced, and the wear resistance life of the packing ring can be improved. The temperature field of the sealing system under different working conditions is simulated. The influence of different working conditions on the temperature field is studied. The temperature of seal face under different compressor speed, different seal pressure and cooling water flow rate was measured by test device, and accelerated test was carried out to measure the wear depth of seal pair after test. To some extent, the research theory of this paper is verified.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE65;TQ051.21

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