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Analysis and optimization of nitrile butadiene rubber sealing mechanism of ball valve 被引量:11
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作者 Young-Chul PARK 《中国有色金属学会会刊:英文版》 CSCD 2009年第B09期220-224,共5页
An approach for analyzing and optimizing sealing mechanism of ball valve made of nitrile butadiene rubber(NBR) with finite element method was presented. The Mooney-Rivlin hyperelastic material model was chosen to char... An approach for analyzing and optimizing sealing mechanism of ball valve made of nitrile butadiene rubber(NBR) with finite element method was presented. The Mooney-Rivlin hyperelastic material model was chosen to characterize NBR sealing, as it has been recommended in the similar applications. That is, NBR sealing was modeled as incompressible hyperelasticity, as well as the assumption of isotropic flow. The results illustrate the structural pressure and contact pressure on the contact surface, which shows that the NBR sealing mechanism is very suitable for sealing after dimension optimization. 展开更多
关键词 橡胶密封 丁腈橡胶 尺寸优化 机制 球阀 有限元方法 材料模型 各向同性
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3D TRANSIENT COUPLED THERMOELASTIC-PLASTIC CONTACT SEALING ANALYSIS OF REACTOR PRESSURE VESSEL 被引量:2
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作者 Du Xuesong Li Runfang Lin Tengjiao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2005年第4期473-476,共4页
Sealing analysis of sealing system in reactor pressure vessels is relevant with multiple nonlinear coupled-field effects, so even large-scale commercial finite element software cannot finish the complicated analysis. ... Sealing analysis of sealing system in reactor pressure vessels is relevant with multiple nonlinear coupled-field effects, so even large-scale commercial finite element software cannot finish the complicated analysis. A finite element method of 3D transient coupled thermo-elastic-plastic contact sealing analysis for reactor pressure vessels is presented, in which the surface nonlinearity, material nonlinearity, transient heat transfer nonlinearity and multiple coupled effect are taken into account and the sealing equation is coupling solved in iterative procedure. At the same time, a computational analysis program is developed, which is applied in the sealing analysis of experimental reactor pressure vessel, and the numerical results are in good coincidence with the experimental resuits. This program is also successful in analyzing the practical problem in engineering. 展开更多
关键词 Pressure vessel sealing analysis Finite element method
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Structural Design and Performance Analysis of a Deep-Water Ball Joint Seal 被引量:2
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作者 Yongjun Hou Qian Tang +1 位作者 Zhixing Wu Xiaoming Liu 《Journal of Marine Science and Application》 CSCD 2018年第2期224-232,共9页
To overcome the current difficulties of high-precision machining and the high manufacturing and maintenance costs of spherical seals for deep-water drilling ball joints,a new spherical seal technique is proposed in th... To overcome the current difficulties of high-precision machining and the high manufacturing and maintenance costs of spherical seals for deep-water drilling ball joints,a new spherical seal technique is proposed in this paper.The spherical seal is mainly composed of silicone rubber and polytetrafluoroethylene(PTFE).Rational structural design makes the seal independent from the ball and other components,making it easy to replace if leakage occurs at its surface.PTFE can elastically deform over a certain deformation range,which guarantees that two sealing surfaces fit tightly together.O-Ring and PTFE elasticity makes up for any lack of accuracy during spherical machining and decreases the machining precision requirements for spherical surfaces.Using a finite element technique and nonlinear theory,the performance of the spherical seal under the influence of various factors is determined.The results show that the spherical seal designed in this paper exhibits excellent sealing performance under lowtemperature and high-pressure conditions.The spherical seal,a combination of an O-ring and PTFE,has the advantages of cheap manufacturing and maintenance costs and excellent sealing performance. 展开更多
关键词 DEEP-WATER DRILLING BALL joint SPHERICAL seal Nonlinear theory Finite element technique sealING performance
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Constitutive Modelling of Elastomeric Seal Material under Compressive Loading 被引量:1
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作者 Ismail J. Abubakar Peter Myler Erping Zhou 《Modeling and Numerical Simulation of Material Science》 2016年第2期28-40,共13页
Elastomers are used in numerous engineering applications such as sealing components, it is therefore important to devise a method that can accurately predict elastomers’ response to load. Many applications that emplo... Elastomers are used in numerous engineering applications such as sealing components, it is therefore important to devise a method that can accurately predict elastomers’ response to load. Many applications that employ the use of these materials subject them to a nonlinear large strain;therefore the simple Hooke’s law is not sufficient to describe their material behaviour. This paper presents an approach to obtain material properties of elastomer under compression loading, based on hyperelastic strain formulation, through experimental test and finite element modelling. The paper focuses on the isotropic incompressible behaviour exhibited by elastomers, and obtains strain energy functions that satisfy the characteristic properties of a hyperelastic model. Data obtained from compression test on a nitrile rubber (NBR) specimen were used as material input into ABAQUS&reg;—a finite element analysis software. A least square fitting technique was used to determine the coefficients of various stable hyperelastic models, based on Drucker’s stability criteria within the software. The strain energy functions obtained concentrate on material parameters which are related to physical quantities of the material molecular network they are subjected to in practical application. The approach benefits from mathematical simplicity, and possesses the property of the deformation mode dependency. Furthermore, a model validation procedure using a step-by-step method for parameters estimation is explained. The work herein is a nonlinear finite element modelling process that leads to an optimal solution and can be employed not only for elastomeric seals, but also for similar engineering assets. 展开更多
关键词 ELASTOMER HYPERELASTICITY Elastomer seal Finite element Modelling
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Fluid-solid Interaction Model for Hydraulic Reciprocating O-ring Seals 被引量:11
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作者 LIAO Chuanjun HUANG Weifeng +2 位作者 WANG Yuming SUO Shuangfu LIU Ying 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第1期85-94,共10页
Elastohydrodynamic lubrication characteristics of hydraulic reciprocating seals have significant effects on sealing and tribology performances of hydraulic actuators, especially in high parameter hydraulic systems. On... Elastohydrodynamic lubrication characteristics of hydraulic reciprocating seals have significant effects on sealing and tribology performances of hydraulic actuators, especially in high parameter hydraulic systems. Only elastic deformations of hydraulic reciprocating seals were discussed, and hydrodynamic effects were neglected in many studies. The physical process of the fluid-solid interaction effect did not be clearly presented in the existing fluid-solid interaction models for hydraulic reciprocating O-ring seals, and few of these models had been simultaneously validated through experiments. By exploring the physical process of the fluid-solid interaction effect of the hydraulic reciprocating O-ring seal, a numerical fluid-solid interaction model consisting of fluid lubrication, contact mechanics, asperity contact and elastic deformation analyses is constructed with an iterative procedure. With the SRV friction and wear tester, the experiments are performed to investigate the elastohydrodynamic lubrication characteristics of the O-ring seal. The regularity of the friction coefficient varying with the speed of reciprocating motion is obtained in the mixed lubrication condition. The experimental result is used to validate the fluid-solid interaction model. Based on the model, The elastohydrodynamic lubrication characteristics of the hydraulic reciprocating O-ring seal are presented respectively in the dry friction, mixed lubrication and full film lubrication conditions, including of the contact pressure, film thickness, friction coefficient, liquid film pressure and viscous shear stress in the sealing zone. The proposed numerical fluid-solid interaction model can be effectively used to analyze the operation characteristics of the hydraulic reciprocating O-ring seal, and can also be widely used to study other hydraulic reciprocating seals. 展开更多
关键词 reciprocating O-ring seal elastohydrodynamic lubrication finite-element method fluid-solid interaction mixed lubrication SRV friction and wear tester
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Contact Pressure between the Outside Surface of the Sealer and Cylinder Wall
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作者 Sc. D. Elkhan M. Abbasov Kaklik O. Rustamova Aynur O. Darishova 《Journal of Applied Mathematics and Physics》 2020年第2期349-366,共18页
Character of contract pressure distribution between the outside surface of the sealing material and rigid cylinder wall depending on geometrical sizes and mechanical properties of a sealer under its unilateral compres... Character of contract pressure distribution between the outside surface of the sealing material and rigid cylinder wall depending on geometrical sizes and mechanical properties of a sealer under its unilateral compression, is defined. The magnitude of the axial load for achieving tightness is determined. The dependence between the magnitude of the axial load necessary for achieving tightness and geometrical sizes is determined. It is shown that with a decrease in the height of the sealing element, the axial load necessary for achieving tightness greatly increases. Threshold height of the sealer, above which contact pressure depends little on the magnitude of the axial load, is defined. The stress-strain state of the sealing element is defined with regard to viscous-elastic properties of its material. It is shown that this greatly influences its sealing ability. 展开更多
关键词 Contact Pressure sealING element BOUNDARY CONDITION Potential Energy Functional
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油罐车自主加注臂密封圈响应面优化及分析
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作者 袁明新 蒋为钰 +2 位作者 王巍 李解 申燚 《液压与气动》 北大核心 2024年第5期118-128,共11页
为了提高油罐车自主加注臂前端快接装置的密封性能,设计了一种内胀式橡胶密封圈,并结合响应面法和有限元法对密封圈进行了优化和分析。首先,基于有限元软件ANSYS Workbench对密封圈进行建模和仿真,研究了密封圈的倒圆半径、厚度和压缩... 为了提高油罐车自主加注臂前端快接装置的密封性能,设计了一种内胀式橡胶密封圈,并结合响应面法和有限元法对密封圈进行了优化和分析。首先,基于有限元软件ANSYS Workbench对密封圈进行建模和仿真,研究了密封圈的倒圆半径、厚度和压缩量对密封圈性能的影响;然后,将密封圈与管壁的接触面积、接触压力和所受等效应力作为优化目标,利用Design⁃Expert软件建立了密封结构的优化模型,并通过多目标优化获得最优设计方案;最后,进行了密封圈优化前后的性能对比和分析。数值测试表明,在最大3 MPa介质压力下,优化后密封圈的接触压力提升了1.3 MPa,有效接触面积更大,且接触带更加集中,有利于实现快接装置和油罐车加注口的有效密封,同时等效应力降低了4.3%,有助于延长密封圈的使用寿命。 展开更多
关键词 自主加注臂 橡胶密封圈 有限元分析 响应面法 密封性能
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高空台流量管新型篦齿密封特性分析及结构优化设计
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作者 艾延廷 张文亮 +3 位作者 田金虎 侯鑫正 张兴源 孙丹 《推进技术》 EI CAS CSCD 北大核心 2024年第11期204-214,共11页
针对高空台流量管与导流盆连接结构减小气体泄漏、避免出现反向进气压力过大导致结冰的设计要求,开展不同内径流量管新型篦齿密封特性及结构参数优化研究。建立了高空台新型流量管篦齿密封结构有限元模型,并开展了新型流量管篦齿密封结... 针对高空台流量管与导流盆连接结构减小气体泄漏、避免出现反向进气压力过大导致结冰的设计要求,开展不同内径流量管新型篦齿密封特性及结构参数优化研究。建立了高空台新型流量管篦齿密封结构有限元模型,并开展了新型流量管篦齿密封结构泄漏特性实验研究。基于数值模拟与试验,研究了流量管内径对密封性能的影响规律。根据Box-Behnken响应面设计法,选取不同流量管内径下的密封间隙、控制口数量以及孔型出口数量为优化参数,进行新型篦齿密封结构参数优化设计研究。结果表明:仿真泄漏量与试验值相比最大误差不超过7%,证明了本文仿真模型的有效性;当结构内径由1 m增大到3 m,密封泄漏量由0.021 kg/s逐渐增加到0.162 kg/s,增幅高达671.4%;内径1 m,2 m和3 m篦齿密封结构经优化后,最大流速分别减小了16.1%,14.3%和9.7%,泄漏量分别降低50.74%,98.50%和97.52%。本文研究为高空台新型流量管篦齿密封结构优化设计提供了有效方法,也为流量管尺寸规范化设计提供了技术支撑。 展开更多
关键词 高空台 篦齿封严 有限元分析 泄漏特性 优化设计
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球面-锥面特殊螺纹接头密封面能量耗散及密封性分析
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作者 秦彦斌 李俊城 +2 位作者 于洋 曹银萍 窦益华 《机电工程技术》 2024年第2期69-74,共6页
为从能量耗散角度研究不同井下工况对球面-锥面特殊螺纹接头密封面处密封性的影响,借助ABAQUS有限元软件建立了球面-锥面特殊螺纹接头密封面的模型-球面-平面接触模型,得出了不同切向位移载荷、不同压力和不同摩擦因数下的载荷-位移迟... 为从能量耗散角度研究不同井下工况对球面-锥面特殊螺纹接头密封面处密封性的影响,借助ABAQUS有限元软件建立了球面-锥面特殊螺纹接头密封面的模型-球面-平面接触模型,得出了不同切向位移载荷、不同压力和不同摩擦因数下的载荷-位移迟滞曲线的变化规律;利用密封接触强度理论评价特殊螺纹接头的密封性能。结果表明:摩擦因数越大,可承受的宏观滑移载荷越大;随着载荷的增大,密封面呈现刚度软化现象。部分滑移状态和完全滑移状态下,接触区域的能量耗散值都随着切向位移载荷、压力和摩擦因数的增大而增大,说明密封性能有所降低。由密封强度理论得当压力处于15~40 MPa时,密封面均满足密封要求;随着压力的增大,密封接触强度增大,密封性能也随之提高。研究结果可为井下复杂工况条件下提高球面-锥面特殊螺纹接头密封性能提供参考。 展开更多
关键词 特殊螺纹接头 能量耗散 球面-锥面 密封性能 有限元
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水轮机组接力器锁锭系统改造优化设计分析
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作者 蒲国庆 蒲俊霞 +1 位作者 胡宁 冯毅 《机械管理开发》 2024年第9期145-146,149,共3页
为解决传统水轮机组接力器锁锭系统存在的油液渗漏、操作不便、耗油量大、油缸上下腔窜油等问题,提出对现有结构采取以下措施进行整体改造优化设计:将控制阀组优化设计布置在油缸的上端盖上,采用通用型组合密封元件替代传统O形密封圈,... 为解决传统水轮机组接力器锁锭系统存在的油液渗漏、操作不便、耗油量大、油缸上下腔窜油等问题,提出对现有结构采取以下措施进行整体改造优化设计:将控制阀组优化设计布置在油缸的上端盖上,采用通用型组合密封元件替代传统O形密封圈,并对油缸筒体、上缸盖、活塞杆进行了重新设计。设计改造完成后,系统结构更加紧凑,减少了管路数量,避开了对检修操作有妨碍的物体,方便设备的检修维护操作,同时降低了对环境造成污染的可能性,取得了较好的应用效果。 展开更多
关键词 水轮机组接力器 锁锭系统 油缸 密封元件
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Analysis of Factors Affecting Sealing Performance of Subsea Wellhead Connector
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作者 Liangliang Ding Miao Xian 《World Journal of Engineering and Technology》 2022年第2期230-240,共11页
Subsea wellhead connector is the key equipment for offshore oil and gas production. The working water depth is generally more than 500 m, so it has higher requirements for its sealing performance. In this paper, the V... Subsea wellhead connector is the key equipment for offshore oil and gas production. The working water depth is generally more than 500 m, so it has higher requirements for its sealing performance. In this paper, the VX gasket matched with H-4 subsea wellhead connector is taken as the research object, and the mechanical analysis under preload and production conditions is carried out. The finite element model of subsea wellhead connector is established by ABAQUS software, and the influence of axial preload, production pressure and material properties on the sealing performance of VX gasket is studied. The results show that the greater the axial preload, the greater the contact stress on the gasket surface;the contact stress decreases first and then increases linearly with the increase of production pressure;the material properties of the gasket are also an important factor affecting its sealing performance, 316L stainless steel is more suitable for gasket material than 304 stainless steel and Inconel625. 展开更多
关键词 Subsea Connector sealing Performance VX Gasket Contact Stress Finite element Analysis
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止浆塞外塞胶料的设计及优化
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作者 肖明清 王克金 +1 位作者 崔浩铖 杨海波 《橡胶工业》 CAS 2024年第4期281-286,共6页
设计一种新型具有密封和排气功能的止浆塞,采用有限元方法对止浆塞的实际工作状态进行数值模拟分析,对外塞胶料进行优化。结果表明:随着止浆塞外塞胶料的硬度的减小,止浆塞的密封性能提高;综合考虑密封性能和成本,确定止浆塞外塞采用邵... 设计一种新型具有密封和排气功能的止浆塞,采用有限元方法对止浆塞的实际工作状态进行数值模拟分析,对外塞胶料进行优化。结果表明:随着止浆塞外塞胶料的硬度的减小,止浆塞的密封性能提高;综合考虑密封性能和成本,确定止浆塞外塞采用邵尔A型硬度为40度的天然橡胶胶料。 展开更多
关键词 止浆塞 外塞 胶料 密封性能 优化设计 有限元分析
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基于有限元分析的液压缸密封圈磨损分析
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作者 师玉璞 杜娴 +2 位作者 赵帆 唐梓巍 杜慧玲 《液压气动与密封》 2024年第1期74-78,共5页
液压缸密封圈磨损原因较多,难以通过肉眼直观观察,很难找到直接原因,提出基于有限元的液压缸密封圈磨损量分析方法。基于液压缸密封圈几何模型、材料模型和物理模型,分析了橡胶密封圈在应力和应变上的非线性,通过定义应变密度函数,构建... 液压缸密封圈磨损原因较多,难以通过肉眼直观观察,很难找到直接原因,提出基于有限元的液压缸密封圈磨损量分析方法。基于液压缸密封圈几何模型、材料模型和物理模型,分析了橡胶密封圈在应力和应变上的非线性,通过定义应变密度函数,构建了液压缸密封圈的有限元模型。根据液压缸活塞的密封结构,分析了液压缸活塞的运动特点,利用Archard模型描述密封圈的外观特征变化,通过计算密封圈接触面上任意一点的磨损深度,分析液压缸密封圈的磨损量。试验结果表明,所研究方法可以对液压缸密封圈的裂纹深度与裂纹扩展角度进行有效分析,两项指标的试验分析与实测结果基本一致,裂纹深度的试验分析误差最大值仅为0.002 mm。方法有助于提高液压缸设计的密封可靠性。 展开更多
关键词 有限元分析 几何模型 密封圈 网格划分 液压缸 磨损量
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基于有限单元法密封结构影响因素建模分析
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作者 户燕会 方雅 +1 位作者 户东亮 姜奎 《机械设计与制造》 北大核心 2024年第4期205-208,213,共5页
密封圈结构对高压试验装置的密封性、承压性具有直接影响。依据高压试验装置的结构特点,对O型密封结构进行结构参数分析,基于Mooney-Rivlin模型对特性进行分析;利用MARC有限元分析的方法对O型圈进行密封分析,分析不同密封间隙和槽深的... 密封圈结构对高压试验装置的密封性、承压性具有直接影响。依据高压试验装置的结构特点,对O型密封结构进行结构参数分析,基于Mooney-Rivlin模型对特性进行分析;利用MARC有限元分析的方法对O型圈进行密封分析,分析不同密封间隙和槽深的尺寸下,接触压应力和Von Mises应力的大小,基于分析结果,优选密封间隙和槽深参数。结果可知:密封间隙为(0.04~0.14)mm间,压缩率为(10~20)%间,能够满足设计承载条件下的密封要求;通过对影响因素分析发现,密封间隙与Von Mises应力正相关,与接触应力负相关;压缩率提升,Von Mises应力先增后降,最大接触应力先降后增;80MPa压力下,较小密封间隙、压缩率对密封结构承载是有利的;通过分析设计密封圈影响趋势,发现参数的最优解为间隙0.043mm,槽深5.357mm,压缩率为10%。分析方法和研究结果可为超高压压力容器O型密封结构设计提供参考依据。 展开更多
关键词 密封结构 影响因素 有限单元法 O形圈 高压试验装置
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井下应急封隔器结构设计及胶筒坐封效果评价
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作者 李劲松 王磊 +4 位作者 雷磊 郑铭 殷志明 黄小光 余焱群 《西安石油大学学报(自然科学版)》 CAS 北大核心 2024年第4期76-82,共7页
为应对海洋钻井过程出现的高压溢流和井涌风险,设计了一种井下应急封隔器装置,在内外胶筒间添加金属骨架提高其坐封强度。为评估井下应急封隔器的坐封效果,利用有限元方法建立井下应急封隔器模型,模拟了封隔器的坐封过程,并对比了金属... 为应对海洋钻井过程出现的高压溢流和井涌风险,设计了一种井下应急封隔器装置,在内外胶筒间添加金属骨架提高其坐封强度。为评估井下应急封隔器的坐封效果,利用有限元方法建立井下应急封隔器模型,模拟了封隔器的坐封过程,并对比了金属骨架对胶筒接触应力、坐封效果的影响。结果表明:20 MPa坐封压力下,胶筒与套管接触应力达到12.1 MPa,封隔器能够封堵20 MPa井下溢流;添加金属骨架后,胶筒峰值应力、变形均显著降低,坐封能力大幅提升。所设计的井下应急封隔器装置可实现高压溢流、井涌的有效封堵,保障平台作业安全。 展开更多
关键词 井下应急封隔器 坐封 有限元 金属骨架
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基于材料与几何结构的滚动轴承密封性能分析 被引量:1
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作者 安国良 张义民 刘晶晶 《机械工程与自动化》 2024年第2期34-36,共3页
利用有限元法模拟分析深沟球轴承橡胶防尘盖的密封性能,通过模拟分析得到橡胶材料与密封唇过盈量对防尘盖密封性能的影响。研究结果表明:接触压力充足、摩擦力矩小的氢化丁腈橡胶材料更符合密封要求;过盈量在0.05 mm~0.07 mm之间接触压... 利用有限元法模拟分析深沟球轴承橡胶防尘盖的密封性能,通过模拟分析得到橡胶材料与密封唇过盈量对防尘盖密封性能的影响。研究结果表明:接触压力充足、摩擦力矩小的氢化丁腈橡胶材料更符合密封要求;过盈量在0.05 mm~0.07 mm之间接触压力分布合理,产生的摩擦力矩较小,密封性能最佳,而密封唇的过盈量大于0.07 mm时接触压力开始偏移。 展开更多
关键词 滚动轴承 橡胶防尘盖 密封性能 有限元法
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高速篦齿碰摩对封严环裂纹萌生与扩展影响研究
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作者 畅佳琪 李辉东 +3 位作者 解文博 慕琴琴 陈永辉 杨卫华 《航空工程进展》 CSCD 2024年第5期127-134,共8页
篦齿封严结构碰摩是航空发动机空气系统工作中存在的普遍问题,由于实际碰摩中难以观察到封严环上裂纹萌生与扩展的过程,采用有限元方法进行数值仿真能够对裂纹萌生与扩展过程和机理有更加深入的认识。建立碰摩后带磨损槽的封严环模型,... 篦齿封严结构碰摩是航空发动机空气系统工作中存在的普遍问题,由于实际碰摩中难以观察到封严环上裂纹萌生与扩展的过程,采用有限元方法进行数值仿真能够对裂纹萌生与扩展过程和机理有更加深入的认识。建立碰摩后带磨损槽的封严环模型,考虑了封严环表面对流换热、碰摩力和碰摩温度,采用扩展有限元法(XFEM)对封严环碰摩温度场、应力场以及裂纹的萌生与扩展进行数值研究,并将仿真分析结果与碰摩试验裂纹结果进行对比。结果表明:数值仿真所得到的裂纹萌生位置及扩展方向均与碰摩试验中实际产生的裂纹基本一致,揭示了裂纹产生的机理,证明了该模型能够较好地模拟碰摩所导致的裂纹萌生与扩展过程。 展开更多
关键词 篦齿封严 碰摩 扩展有限元 裂纹萌生 裂纹扩展
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井下封隔器气体密封性能试验 被引量:1
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作者 杨冠 何炜 胡耀辉 《石化技术》 CAS 2024年第3期187-189,共3页
通过试验模拟井下高压注气全过程,分析井下密封设备气体密封性能。在393K试验环境下,H1010-1橡胶密封件在35MPa以下的工作压力范围之内具有较好的气体密封能力。当高于35MPa时,气体逐渐泄漏;H2010-1橡胶密封件逐渐泄漏,气体泄漏的速度... 通过试验模拟井下高压注气全过程,分析井下密封设备气体密封性能。在393K试验环境下,H1010-1橡胶密封件在35MPa以下的工作压力范围之内具有较好的气体密封能力。当高于35MPa时,气体逐渐泄漏;H2010-1橡胶密封件逐渐泄漏,气体泄漏的速度也伴随着压力的提升越来越快,H1010-1橡胶材料适用于封隔器密封件。 展开更多
关键词 封隔器 密封性能 密封件
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芯轴式套管悬挂器金属密封设计及性能分析 被引量:1
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作者 王峰 郑智冬 +5 位作者 刘立超 邓青山 李文 田锋 周俊泽 李瑞玲 《石油矿场机械》 CAS 2024年第1期59-64,共6页
为了避免芯轴式套管悬挂器密封失效,根据芯轴式套管悬挂器的结构及密封工作原理,设计了一种新型的金属密封结构。建立了芯轴式悬挂器密封性能有限元模型,研究了不同顶丝压力和套管悬重对密封锥面变形及接触压力的影响。结果表明:随顶丝... 为了避免芯轴式套管悬挂器密封失效,根据芯轴式套管悬挂器的结构及密封工作原理,设计了一种新型的金属密封结构。建立了芯轴式悬挂器密封性能有限元模型,研究了不同顶丝压力和套管悬重对密封锥面变形及接触压力的影响。结果表明:随顶丝推力的增加,上、下密封锥面上平均接触压力都增加,有利于实现密封;随套管悬重的增加,上密封锥平均接触压力增加,下密封锥平均接触压力减小,除下内锥面外,均能满足密封要求。研究结果可为芯轴式悬挂器密封部位的结构设计提供参考。 展开更多
关键词 芯轴 金属密封 有限元 接触压力
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基于有限元法的山型水封封头形状研究
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作者 汪振宁 王珏 +1 位作者 李光宇 施允洋 《水利与建筑工程学报》 2024年第4期72-78,119,共8页
山形自封闭水封广泛应用于高水头、超高水头闸门止水装置中,其止水性能受封头形状影响较大,为了探究封头形状对山形自封闭水封止水性能的影响,基于非线性有限元方法对山形自封闭水封止水装置进行仿真分析。根据水封材料试验数据采用最... 山形自封闭水封广泛应用于高水头、超高水头闸门止水装置中,其止水性能受封头形状影响较大,为了探究封头形状对山形自封闭水封止水性能的影响,基于非线性有限元方法对山形自封闭水封止水装置进行仿真分析。根据水封材料试验数据采用最小二乘法得到水封材料Mooney-Rivlin模型本构参数。通过建立山形自封闭水封止水装置有限元模型并将水封有限元仿真结果与模型试验结果进行对比,验证水封有限元仿真方法可靠性。再对不同工况下不同封头半径、封头偏心距的山形自封闭水封止水装置施加相应荷载及约束并进行有限元仿真计算,得到山型自封闭水封在不同工况下的接触应力、接触宽度、变形情况等。在山型自封闭水封设计中,应根据实际情况选取中等偏大的封头半径和合适的封头偏心距。 展开更多
关键词 闸门 山型水封 橡胶本构 有限元仿真
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