超高压节流阀密封件动静密封性能分析与研制
发布时间：2018-08-03 10:30
【摘要】：超高压节流阀是高压、高产气田生产过程中不可缺少的设备之一,同时,其密封性能决定着产品的质量,也是节流阀安全运行的保证,况且节流阀密封件是不可重复使用的易耗品,一直以来都是国外厂家的技术,对产品进行了完全垄断。本文研究的泛塞封为某气田某节流阀上的动密封装置。泛塞封的主要结构由高性能的弹簧以及高分子材料的密封圈组成。对该类型的密封圈在不同工作状态下进行有限元模拟分析,研究其密封性能,可以提高密封的可靠性,为设计提供依据,扩大其运用的领域,具有重要的意义。 本文从密封原理和密封材料入手,分析了流体静、动压密封机理。对三种不同改性材料进行了拉伸、压缩试验,获得了材料的力学性能参数。为泛塞封建立了有限元计算模型,对泛塞封在静止工作状态下进行数值模拟研究,分析了泛塞封在安装后和施加超高压(105MPa)后应力和应变的分布。得到了静密封状态下的接触应力和接触宽度的分布规律。分析了压缩量和工作压力对泛塞封静密封密封性能的影响规律。 影响泛塞封动密封的主要因素是工况参数以及密封件的结构参数,本文对泛塞封使用过程中轴的运动速度、接触面的摩擦系数、密封件的唇前角和唇后角进行了有限元数值模拟研究。找出了工况参数和结构参数对密封性能影响规律,获得了密封件较优的结构参数。 进行理论分析和数值模拟后,对较优的密封结构的密封圈进行了设计、制造。为了对该密封产品进行试验,模拟节流阀的实际工况,设计制造了检验密封圈的工装,对密封圈进行了多次对比试验。试验结果表明,三种不同改性材料,只有添加10%的碳纤的聚四氟乙烯能够使用于此类超高压的工况之下。所研制的密封圈通过157.5MPa的水压试验以及105MPa的气压试验。 本文所研制的超高压泛塞封在相关气田上试用效果良好,得到了相关部门的高度评价。
[Abstract]:Ultra-high pressure throttle valve is one of the indispensable equipments in the production process of high pressure and high yield gas fields. At the same time, its sealing performance determines the quality of the product and is also the guarantee of the safe operation of the throttle valve. Moreover, the throttle seal is a consumable product which can not be reused. It is the technology of foreign manufacturers all the time, and the products are monopolized completely. The flooding seal studied in this paper is a dynamic sealing device on a throttle valve in a gas field. The main structure of the plug-in seal consists of high-performance spring and high-molecular material seal ring. The finite element simulation analysis of this type of sealing ring under different working conditions and the study of its sealing performance can improve the reliability of the seal, provide the basis for the design and expand the field of its application, which is of great significance. Based on the sealing principle and sealing materials, this paper analyzes the sealing mechanism of fluid static and dynamic pressure. The mechanical properties of three kinds of modified materials were obtained by tensile and compression tests. A finite element model was established for the panplug seal, and the stress and strain distribution after installation and after the application of 105MPa was analyzed by numerical simulation of the flooding seal under the static working condition. The distribution of contact stress and contact width under static seal is obtained. The influence of compression and working pressure on the static seal performance is analyzed. The main factors affecting the seal are the working condition parameters and the structural parameters of the seal. In this paper, the velocity of the shaft and the friction coefficient of the contact surface during the use of the flooding seal are studied. The numerical simulation of the labial front angle and labial rear angle of the seal was carried out by finite element method. The influence of working condition parameters and structural parameters on the seal performance is found out, and the optimum structural parameters of the sealing parts are obtained. After theoretical analysis and numerical simulation, the sealing ring with better sealing structure is designed and manufactured. In order to test the sealing product and simulate the actual working condition of the throttle valve, the tooling for inspecting the sealing ring was designed and manufactured, and several comparative tests were carried out on the sealing ring. The experimental results show that only 10% carbon fiber PTFE can be used in this kind of ultra-high pressure condition for three different modified materials. The seal ring has passed the water pressure test of 157.5MPa and the air pressure test of 105MPa. The UHP flooding seal developed in this paper has a good trial effect in related gas fields and has been highly evaluated by relevant departments.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE937
本文编号：2161467
[Abstract]:Ultra-high pressure throttle valve is one of the indispensable equipments in the production process of high pressure and high yield gas fields. At the same time, its sealing performance determines the quality of the product and is also the guarantee of the safe operation of the throttle valve. Moreover, the throttle seal is a consumable product which can not be reused. It is the technology of foreign manufacturers all the time, and the products are monopolized completely. The flooding seal studied in this paper is a dynamic sealing device on a throttle valve in a gas field. The main structure of the plug-in seal consists of high-performance spring and high-molecular material seal ring. The finite element simulation analysis of this type of sealing ring under different working conditions and the study of its sealing performance can improve the reliability of the seal, provide the basis for the design and expand the field of its application, which is of great significance. Based on the sealing principle and sealing materials, this paper analyzes the sealing mechanism of fluid static and dynamic pressure. The mechanical properties of three kinds of modified materials were obtained by tensile and compression tests. A finite element model was established for the panplug seal, and the stress and strain distribution after installation and after the application of 105MPa was analyzed by numerical simulation of the flooding seal under the static working condition. The distribution of contact stress and contact width under static seal is obtained. The influence of compression and working pressure on the static seal performance is analyzed. The main factors affecting the seal are the working condition parameters and the structural parameters of the seal. In this paper, the velocity of the shaft and the friction coefficient of the contact surface during the use of the flooding seal are studied. The numerical simulation of the labial front angle and labial rear angle of the seal was carried out by finite element method. The influence of working condition parameters and structural parameters on the seal performance is found out, and the optimum structural parameters of the sealing parts are obtained. After theoretical analysis and numerical simulation, the sealing ring with better sealing structure is designed and manufactured. In order to test the sealing product and simulate the actual working condition of the throttle valve, the tooling for inspecting the sealing ring was designed and manufactured, and several comparative tests were carried out on the sealing ring. The experimental results show that only 10% carbon fiber PTFE can be used in this kind of ultra-high pressure condition for three different modified materials. The seal ring has passed the water pressure test of 157.5MPa and the air pressure test of 105MPa. The UHP flooding seal developed in this paper has a good trial effect in related gas fields and has been highly evaluated by relevant departments.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE937
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