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RESEARCH ON THE PERFORMANCE OF NEW TYPE OF PROPORTIONAL PESSURE AND FLOW CONTROL VALVE 被引量:9
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作者 Quan LongMa JianWang YongjinInstitute of Mechatronics,Taiyuan University of Technology,Taiyuan 030024, China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第3期281-284,共4页
A new closed loop flow controlling principle through correcting the valve'sopening area while load pressure is changing is carried out. Further more a principle using only oneproportional valve to compound control... A new closed loop flow controlling principle through correcting the valve'sopening area while load pressure is changing is carried out. Further more a principle using only oneproportional valve to compound control pressure and flow is suggested. By using very simpleproportional throttle valve in structure, the functions that five kinds of proportional valves orany two of them combined possess can be complimented. After analyzing, comparing, and testing thedynamic and static characteristics of valve with different controlling principles and main valvestructure styles, the optimized structure styles and control methods are achieved. 展开更多
关键词 Electro-hydraulic proportional control Proportional flow valve Proportionalpressure valve Pressure and flow compound control
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Flow Control for a Two-Stage Proportional Valve with Hydraulic Position Feedback 被引量:7
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作者 He Wang Xiaohu Wang +1 位作者 Jiahai Huang Long Quan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第6期64-76,共13页
The current research mainly focuses on the flow control for the two-stage proportional valve with hydraulic position feedback which is named as Valvistor valve.Essentially,the Valvistor valve is a proportional throttl... The current research mainly focuses on the flow control for the two-stage proportional valve with hydraulic position feedback which is named as Valvistor valve.Essentially,the Valvistor valve is a proportional throttle valve and the flow fluctuates with the change of load pressure.The flow fluctuation severely restricts the application of the Valvistor valve.In this paper,a novel flow control method the Valvistor valve is provided to suppress the flow fluctuation and develop a high performance proportional flow valve.The mathematical model of this valve is established and linearized.Fuzzy proportional-integral-derivative(PID)controller is adopted in the closed-loop flow control system.The feedback is obtained by the flow inference with back-propagation neural network(BPNN)based on the spool displacement in the pilot stage and the pressure differential across the main orifice.The results show that inference with BPNN can obtain the flow data fast and accurately.With the flow control method,the flow can keep at the set point when the pressure differential across the main orifice changes.The flow control method is effective and the Valvistor valve changes from proportional throttle valve to proportional flow valve.For the developed proportional flow valve,the settling time of the flow is very short when the load pressure changes abruptly.The performances of hysteresis,linearity and bandwidth are in a high range.The linear mathematical model can be verified and the assumptions in the system modeling is reasonable. 展开更多
关键词 flow control Proportional valve Hydraulic position feedback Back-propagation neural network
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Simulation Analysis of New Energy Vehicle Engine Cooling System Based on K-E Turbulent Flow Mathematical Model
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作者 Hongyu Mu Yinyan Wang +7 位作者 Chuanlei Yang Hong Teng Xingtian Zhao Hongquan Lu Dechun Wang Shiyang Hao Xiaolong Zhang Yan Jin 《Energy Engineering》 EI 2023年第10期2325-2342,共18页
New energy vehicles have better clean and environmental protection characteristics than traditional fuel vehicles.The new energy engine cooling technology is critical in the design of new energy vehicles.This paper us... New energy vehicles have better clean and environmental protection characteristics than traditional fuel vehicles.The new energy engine cooling technology is critical in the design of new energy vehicles.This paper used oneand three-way joint simulation methods to simulate the refrigeration system of new energy vehicles.Firstly,a k-εturbulent flow model for the cooling pump flow field is established based on the principle of computational fluid dynamics.Then,the CFD commercial fluid analysis software FLUENT is used to simulate the flow field of the cooling pump under different inlet flow conditions.This paper proposes an optimization scheme for new energy vehicle engines’“boiling”phenomenon under high temperatures and long-time climbing conditions.The simulation results show that changing the radiator’s structure and adjusting the thermostat’s parameters can solve the problem of a“boiling pot.”The optimized new energy vehicle engine can maintain a better operating temperature range.The algorithm model can reference each cryogenic system component hardware selection and control strategy in the new energy vehicle’s engine. 展开更多
关键词 new energy vehicle new energy vehicle engine k-ε turbulent flow mathematical model cooling system PID control
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Dynamic Modelling and Design of a Servomechanism for Hydraulic Directional-Control Valves 被引量:1
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作者 Tan Runbua and A. J. Reynolds 《河北工业大学学报》 CAS 1997年第A01期58-75,共18页
This paper analyses a control strategy applicable in heaVy-duty hydraulic Systems,namely, the introduction of a servovalve to achieve smoother operation of direCtional-control valves that serve also as flow-control va... This paper analyses a control strategy applicable in heaVy-duty hydraulic Systems,namely, the introduction of a servovalve to achieve smoother operation of direCtional-control valves that serve also as flow-control valves over two fanges of operating conditions. A mathematical model of the dynamics of the System is etallished and design criteria are obtained from a linearised form of that model. The influence of variations in tile axial force on the spool of the main valve is investigated, and the use of the resultS in the design of systems of the proposed kind is discussed. 展开更多
关键词 HYDRAULIC System DYNAMIC Performance Servomechnaism flow-control valve Directional-control valve.
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Experimental investigation on control and reduction of vibration induced by fluid flow in turbine governing valve
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作者 TU Shan WANG Tao +1 位作者 HU Bu-song LIU Yan 《Journal of Energy and Power Engineering》 2007年第1期57-62,共6页
Governing valve is the necessary passage through which steam enters into the steam turbine. The instability of the gas flow inside valve is the main reason that can induce the valve vibration, especially the valve rod... Governing valve is the necessary passage through which steam enters into the steam turbine. The instability of the gas flow inside valve is the main reason that can induce the valve vibration, especially the valve rod vibration. In order to reduce the vibration and improve the performance of the governing valve such as the security and economy of the steam turbine, we try to find the method by experimental investigation. As to commonly used governing valve such as ball governing valve in this paper, a number of micro pressure sensors that have high frequencies and nice dynamic capability are employed successfully. The micro sensors are inserted directly in key positions of the valve, such as positions of valve seat throat, valve disc top and so on. The collection and measurement of many different working conditions are carried out and the conclusion of the valve instability is obtained. Therefore, vibration induced by fluid flow is controlled and reduced by means of regulating operation conditions and valve structure. Meanwhile, by numerical simulation of ball governing valve, valve disc adhered flow and asymmetric collision force are considered as main factor to cause oscillation under the condition of small lift as well as small and middle pressure ratio. 展开更多
关键词 control experimental investigation vibration induced by fluid flow governing valve
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2D DIGITAL SIMPLIFIED FLOW VALVE 被引量:11
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作者 RuanJian LiSheng +3 位作者 PeiXiang BurtonR UkrainetzP BitnerD 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第2期311-314,共4页
The 2D digital simplified flow valve is composed of a pilot-operated valvedesigned with both rotary and linear motions of a single spool, and a stepper motor under continualcontrol. How the structural parameters affec... The 2D digital simplified flow valve is composed of a pilot-operated valvedesigned with both rotary and linear motions of a single spool, and a stepper motor under continualcontrol. How the structural parameters affect the static and dynamic characteristics of the valve isfirst clarified and a criterion for stability is presented. Experiments are designed to test theperformance of the valve. It is necessary to establish a balance between the static and dynamiccharacteristics in deciding the structural parameters. Nevertheless, it is possible to maintain thedynamic response at a fairly high level, while keeping the leakage of the pilot stage at anacceptable level. One of the features of the digital valve is stage control. In stage control thenonlinearities, such as electromagnetic saturation and hysteresis, are greatly reduced. To a largeextent the dynamic response of the valve is decided by the executing cycle of the control algorithm. 展开更多
关键词 Digital control flow valve Two motion of spool Stage control
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Study on Valve Management of DEH for Steam Turbine 被引量:2
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作者 Changjie Yin Jizhen Liu 《Energy and Power Engineering》 2013年第4期319-323,共5页
Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration fig... Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration figure of the domestic-type 300 MW steam turbine, and then makes a simple comparison between the two types of valve governing modes. In order to realize the valve control, the structure of control system has been established, in which the roles of the mathematical functions are discussed. On the basis of the experiment of valve flow characteristic, this article carries out a quantitative study on the functions of the valve management and the parameter tuning method. Through a serious corrections, the sequence valve flow characteristic curve is obtained, which can provide significant guidance on the research of valve management of the similar steam turbines. 展开更多
关键词 valve Management Steam TURBINE Digital ELECTRO-HYDRAULIC control System valve flow CHARACTERISTIC
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Challenges Associated with the Bypass Valves of Control Valves in a Seawater Service
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作者 Karan Sotoodeh 《Journal of Marine Science and Application》 CSCD 2020年第1期127-132,共6页
Modern processing plants use a variety of control loop networks to deliver a finished product to the market.Such control loops,like control valves,are designed to keep process variables such as pressure,temperature,sp... Modern processing plants use a variety of control loop networks to deliver a finished product to the market.Such control loops,like control valves,are designed to keep process variables such as pressure,temperature,speed,flow,etc.within the appropriate operating range and to ensure a quality product is produced.All control valves have a bypass so that production can proceed if maintenance is needed for the control valve as part of the control loop.The important point is that in both operation and maintenance situations,the bypass valve and the control valve should have approximately the same flow capacity to provide nearly the same amount of pressure.This paper presents a case study in seawater service on the selection of manual bypass valves for a 16″control valve in class 150 and titanium material.A 16″butterfly valve of class 150 was chosen for the control valve bypass,which provided a much higher flow capacity than the control valve.In this paper,four solutions are recommended to achieve the same coefficient value(Cv)for the control and bypass valve.Using the reduced size butterfly valve could be the cheapest and best solution.On the other hand,selecting the same control valve for bypass line is the most expensive but maybe the most reliable solution.Using a flow orifice for throttling could be ranked as the second expensive option and the second reliable one.Selection of butterfly valve for throttling is the second cheapest option,but it has the least reliability.Different parameters such as space and weight saving,cost as well as reliability have been considered in evaluation of different solutions. 展开更多
关键词 control valve Bypass valve flow capacity Restriction orifice OFFSHORE Oil and gas
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阀后管道突扩对控制阀门流阻特性的影响 被引量:3
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作者 王蛟 胡亚安 +1 位作者 陈亮 王召兵 《流体机械》 CSCD 北大核心 2024年第1期41-47,共7页
为准确地描述非均匀流条件下控制阀门阀后采用突扩管道后的流阻特性,针对典型控制阀门(活塞式调流阀与固定式锥形阀),采用物理模型试验与理论分析方法,基于阀后突扩管道内的流场结构及试验段压力特性,研究阀后管道突扩对典型控流调压阀... 为准确地描述非均匀流条件下控制阀门阀后采用突扩管道后的流阻特性,针对典型控制阀门(活塞式调流阀与固定式锥形阀),采用物理模型试验与理论分析方法,基于阀后突扩管道内的流场结构及试验段压力特性,研究阀后管道突扩对典型控流调压阀门流阻特性的影响规律。结果表明,不同阀型采用相同突扩体时的流阻特性变化程度不同,阀型的影响主要体现在改变了突扩体的入流、出流条件。在规范公式的基础上,考虑阀门出流流场结构(突扩体入流条件)与水流缩脉(突扩体出流条件)的影响,分析得到管道突扩比与阀门流量系数的定量关系,规范计算值与试验值的最大差异约为8%,优化公式计算值与试验值最大差异约为1%,说明改进后的突扩体流阻系数公式的计算精度较规范公式有所提高。研究结果可为高压差、大流量调流调压系统管路设计提供参考。 展开更多
关键词 控制阀门 突扩体 流量系数 流场结构 水流缩脉
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基于CFD的机械随动调节高度控制阀数值仿真
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作者 周耀兵 严伊豪 +1 位作者 高隆隆 李宝仁 《液压与气动》 北大核心 2024年第2期184-188,共5页
机械随动调节高度控制阀是列车悬挂控制装置的核心部件,其性能的好坏直接影响系统能否稳定工作。在设计过程中,采用CFD对其进行仿真计算,通过对其流场特性的分析,可以验证其流量特性是否满足系统需求。针对机械随动调节高度控制阀内部... 机械随动调节高度控制阀是列车悬挂控制装置的核心部件,其性能的好坏直接影响系统能否稳定工作。在设计过程中,采用CFD对其进行仿真计算,通过对其流场特性的分析,可以验证其流量特性是否满足系统需求。针对机械随动调节高度控制阀内部气体流动特性,建立了机械随动调节高度控制阀流场仿真模型,利用Fluent分析了机械随动调节高度控制阀阀口在不同开度下的流场特性,研究结果为机械随动调节高度控制阀流量性能指标试验提供理论支撑。 展开更多
关键词 CFD 机械随动调节高度控制阀 流场 数值模拟
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微小流量旋转直驱伺服阀传控特性分析与优化
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作者 陆亮 徐寅鹏 +3 位作者 李梦如 张小洁 凌扬洋 李鸿向 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第5期805-814,共10页
针对无人机、战术弹、支线民航等小型飞行器航空发动机燃油计量系统与推力矢量系统微小流量的伺服控制需求,就旋转直驱伺服阀偏心球副传动接口与非全周节流阀口等关键结构进行了尺寸约束设计分析,并就节流阀口宽度、球副偏心距以及驱动... 针对无人机、战术弹、支线民航等小型飞行器航空发动机燃油计量系统与推力矢量系统微小流量的伺服控制需求,就旋转直驱伺服阀偏心球副传动接口与非全周节流阀口等关键结构进行了尺寸约束设计分析,并就节流阀口宽度、球副偏心距以及驱动电机转动惯量等重要参数进行了优化分析,给出了伺服阀结构设计的优化区间。在此基础上,研究提出了电机转角与电流双闭环控制方法,幅频响应实测结果与理论分析较为一致,200 Hz以上高频响应满足实际需求,且双闭环控制方法大幅降低了伺服阀响应超调并提升了稳定性。 展开更多
关键词 旋转直驱伺服阀 微小流量 传动与控制 建模分析 设计优化
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流量控制阀K形金属密封圈结构参数优化
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作者 何东升 郑家乐 +3 位作者 栾京生 郑严 罗杰 蔡午阳 《润滑与密封》 CAS CSCD 北大核心 2024年第8期123-131,共9页
流量控制阀K形金属密封圈结构参数较多,且不同结构参数对密封性能影响程度存在较大差异。以密封面接触压力、密封面有效接触长度及最大Mises应力为约束条件,采用正交试验设计研究影响K形金属密封圈密封性能结构参数之间的主次关系,确定... 流量控制阀K形金属密封圈结构参数较多,且不同结构参数对密封性能影响程度存在较大差异。以密封面接触压力、密封面有效接触长度及最大Mises应力为约束条件,采用正交试验设计研究影响K形金属密封圈密封性能结构参数之间的主次关系,确定了唇部长度、悬臂内张角与悬臂厚度3个因素作为响应曲面法的设计变量;通过正交试验和回归分析得到接触压力、最大等效应力及有效接触长度与设计参数关系的二次回归方程,并基于响应面法对密封结构进行优化分析。优化后K形金属密封圈的接触压力增加了8.09%,有效接触长度增加了14.73%,最大等效应力减少了13.44%,表明优化后K形金属密封圈密封面接触压力分布更加均匀,有效提高了金属密封圈的密封性能。 展开更多
关键词 K形金属密封 结构优化 响应面法 Box-Behnken 流量控制阀
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旁通阀结构对燃料电池系统阴极压力控制效果的分析
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作者 周雅夫 吕浩然 胡宾飞 《汽车工程学报》 2024年第4期653-660,共8页
为减小压力波动对燃料电池寿命的不利影响,通过仿真及对比试验,探究增加旁通阀对阴极供给系统压力波动的改善效果。根据对燃料电池输出特性与各组件工作原理的分析,建立机理与控制模型;采用基于自抗扰的反向解耦方法实现流量与压力的解... 为减小压力波动对燃料电池寿命的不利影响,通过仿真及对比试验,探究增加旁通阀对阴极供给系统压力波动的改善效果。根据对燃料电池输出特性与各组件工作原理的分析,建立机理与控制模型;采用基于自抗扰的反向解耦方法实现流量与压力的解耦控制;运用模糊PI方法实现压力波动控制。通过Matlab/Simulink仿真验证了解耦方法在该系统结构下的控制效果,在对比试验中,压力波动峰值分别为无旁通阀1.82kPa与有旁通阀1.09kPa,旁通阀的增加减小了压力波动,使阴极流道压力的稳定性得到了更有效的控制,对提升燃料电池寿命有重要意义。 展开更多
关键词 旁通阀 燃料电池 流量压力解耦控制 压力波动控制
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高压阀口液动力补偿控制策略仿真分析 被引量:2
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作者 李海宾 沈俊 +3 位作者 仇智 苏琦 张志豪 徐兵 《液压与气动》 北大核心 2024年第1期1-9,共9页
直动式比例伺服阀是一种新型的单级伺服阀,采用比例电磁铁或线性力马达直接驱动滑阀运动,具有成本低、频响高、抗污染能力强等优点,广泛应用于注塑机进给控制、轧机板厚控制系统等高速高精度液压控制系统中。传统的直动式比例伺服阀采用... 直动式比例伺服阀是一种新型的单级伺服阀,采用比例电磁铁或线性力马达直接驱动滑阀运动,具有成本低、频响高、抗污染能力强等优点,广泛应用于注塑机进给控制、轧机板厚控制系统等高速高精度液压控制系统中。传统的直动式比例伺服阀采用PID控制策略实现阀芯的精确位置控制,在高压大流量工况下(供油压力达到20 MPa、流量大于100 L/min),阀芯受到液动力扰动变得更加剧烈,易出现响应速度慢、阀芯抖动的现象,影响了比例伺服阀的控制精度。为了解决大液动力扰动的问题,提出了一种基于指数收敛干扰观测器的滑模控制器。通过建立阀芯动力学模型来设计滑模控制器,保证阀芯位置的高动态跟踪性能;使用基于指数收敛的干扰观测器,估计阀芯动力学模型中液动力的不确定性扰动,解决高压大流量工况下的阀芯液动力扰动补偿问题。搭建了比例伺服阀系统的联合仿真模型进行仿真验证,结果表明,提出的控制器可以解决高压大流量工况下阀芯液动力扰动对阀芯位置控制的干扰问题。 展开更多
关键词 直动式比例伺服阀 阀芯位置控制 滑模控制 液动力
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基于爪极式磁悬浮力矩马达的流量调节阀
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作者 聂乐 宋占凯 +3 位作者 黄家辉 郑坤山 李胜 阮健 《液压与气动》 北大核心 2024年第11期19-27,共9页
传统流量调节阀存在结构复杂、质量大、输出流量小等缺点,不适用于航空航天等特殊领域。设计了一种新型流量调节阀,该阀为旋转直驱式,具有输出流量大、结构简单、质量轻等优点。利用UG软件建立三维模型,介绍了该流量调节阀的工作原理。... 传统流量调节阀存在结构复杂、质量大、输出流量小等缺点,不适用于航空航天等特殊领域。设计了一种新型流量调节阀,该阀为旋转直驱式,具有输出流量大、结构简单、质量轻等优点。利用UG软件建立三维模型,介绍了该流量调节阀的工作原理。基于Workbench和Fluent软件,分别建立流量阀的强度校核模型和流体域模型,进行阀芯、阀套变形量仿真及稳态流场仿真。加工实验样机,进行流量调节阀的静态特性测试。结果表明:该流量调节阀总质量为375.5 g,当入口压力为4 MPa,出口压力为3.5 MPa时,最大输出流量为25.99 L/min,满足质量轻、输出流量大的使用需求。 展开更多
关键词 流量调节阀 结构设计 仿真分析 实验测试
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基于流量调节阀的变量喷灌装置设计与试验
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作者 张廷宁 朱德兰 +3 位作者 李钊 赵航 纳扎罗夫·胡代贝尔迪 柳昌新 《农业机械学报》 EI CAS CSCD 北大核心 2024年第10期339-345,359,共8页
为实现Senninger i-Wob2型喷头的喷灌流量精准变量调节,在喷头前安装V型流量调节阀作为执行机构,通过阀体水力性能试验,建立阀前压力、阀体开度和喷头流量之间的数学关系,据此设计变量喷灌控制系统,实现喷灌流量的精准调节。研究结果表... 为实现Senninger i-Wob2型喷头的喷灌流量精准变量调节,在喷头前安装V型流量调节阀作为执行机构,通过阀体水力性能试验,建立阀前压力、阀体开度和喷头流量之间的数学关系,据此设计变量喷灌控制系统,实现喷灌流量的精准调节。研究结果表明:确定压力-开度-流量的数学模型特征流量系数KL为20.40,阀后压力预测系数KP为0.97,流量预测系数Kφ为7.08;喷头射程和流量在相对开度为60%前,随阀体开度变化较为明显;而在相对开度为60%后,射程与流量随相对开度的变化幅度越来越小;调节阀流量调节的稳态相对偏差不超过6.67%,调节时间不超过42 s,测量精度在96%以上。该研究实现了基于流量调节阀喷灌流量的精准控制,为流量调节阀在变量灌溉中的应用提供了数据支持。 展开更多
关键词 流量调节阀 水力性能 灌溉流量 自动调测
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基于黏度敏感性的流量控制阀研究及应用 被引量:1
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作者 刘传刚 张云驰 +3 位作者 鞠少栋 邢洪宪 王丙刚 季菊香 《机械设计》 CSCD 北大核心 2024年第1期161-166,共6页
在石油开采过程中,由于底水锥进、储层非均质性等原因会出现油层出水现象,这会导致产油量递减加快,于是不断有新技术被应用到油井完井之中,以达到延缓水突破和控水增油的目的。为此,文中研发了一种基于流量控制阀的控水技术,该结构可根... 在石油开采过程中,由于底水锥进、储层非均质性等原因会出现油层出水现象,这会导致产油量递减加快,于是不断有新技术被应用到油井完井之中,以达到延缓水突破和控水增油的目的。为此,文中研发了一种基于流量控制阀的控水技术,该结构可根据流体黏度大小自动控制阀体过流量,限制低黏度流体的通过性,在一定程度上起到了控水的作用。借助CFD软件对该项技术进行深入研究,并通过对流场特性分析,剖析了其工作原理及工作特性,该技术经渤海油田现场应用验证,取得了显著的控水增油效果,为控水生产的相关工具开发提供了理论依据及技术支撑。 展开更多
关键词 流量控制阀 控水 数值模拟 CFD 现场应用
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大变幅流量下重力流系统末端调流阀流量特性选型研究
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作者 童保林 李直权 +3 位作者 李玲玲 阳雯 顾世祥 刘志勇 《中国农村水利水电》 北大核心 2024年第10期188-192,199,共6页
针对大变幅流量下重力流系统末端调流阀流量特性的选型问题,基于一维水锤理论,采用数值模拟方法,结合工程实例,从调流阀流量特性对稳态运行开度的影响、调流阀关阀水锤最不利流量工况确定、调流阀流量特性对关阀水锤的影响等3个方面,对... 针对大变幅流量下重力流系统末端调流阀流量特性的选型问题,基于一维水锤理论,采用数值模拟方法,结合工程实例,从调流阀流量特性对稳态运行开度的影响、调流阀关阀水锤最不利流量工况确定、调流阀流量特性对关阀水锤的影响等3个方面,对线性型、抛物线型和等百分比型等3种流量特性进行比较研究。结果表明:①等百分比型流量特性更有利于调流阀在小流量工况的稳定运行。该工况下,等百分比型调流阀的稳态运行开度更大,可避免因开度过小导致的汽蚀和振动。②关阀水锤的最不利流量工况应考虑初始流量最小工况。该工况的调流阀前初始压力最大,关阀历时最短,阀前最大水锤压力往往最大。③等百分比型流量特性更有利于减小调流阀的关阀水锤压力。在相同的初始流量和关阀速率下,等百分比型调流阀的初始开度更大,实际关阀历时更长,在小开度区域的流量系数变化梯度更小,因而关阀水锤压力更小,更有利于管道安全。 展开更多
关键词 调流阀 流量特性 稳态开度 关阀水锤 大变幅流量 重力流输水系统
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基于AMESim的电液执行系统流量匹配阀结构参数优化
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作者 张天爱 张宏 +2 位作者 孙娜 刘日麟 吴阔 《机电工程》 CAS 北大核心 2024年第6期969-979,共11页
以应用于某电力系统中电力开关精密控制的电液执行系统为研究对象,针对其工作特性不满足工程实际需求的问题,从其关键组成部件——流量匹配阀的结构参数研究入手,对电液执行系统的工作特性进行了理论分析、仿真分析以及试验测试。首先,... 以应用于某电力系统中电力开关精密控制的电液执行系统为研究对象,针对其工作特性不满足工程实际需求的问题,从其关键组成部件——流量匹配阀的结构参数研究入手,对电液执行系统的工作特性进行了理论分析、仿真分析以及试验测试。首先,对阀门内部结构和系统工作原理进行了分析;然后,建立了该电液执行系统的数学模型及仿真模型,经试验验证了该仿真模型的可行性与准确性;最后,探究了流量匹配阀的单因素结构参数对电液执行系统工作特性的影响规律,设计并进行了正交试验,得到了可选范围内的最优结构参数组合方案。研究结果表明:流量匹配阀的阀座钢球密封弹簧预紧力、阀座钢球密封弹簧刚度以及阀口初始遮盖量等结构参数对电液执行系统的工作特性都有重要影响,最优结构参数方案相较于原方案,系统的响应时间由133 ms缩短为42 ms,定位精度由0.261%提高至0.096%,可有效缩短系统响应时间,提高系统定位精度,满足工程实际需求。 展开更多
关键词 液压控制阀 电液执行系统 流量匹配阀 AMESIM 响应时间 定位精度 正交试验
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高参数高压差流量调节无死区控制阀的研究与应用
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作者 金永杰 陈瑶池 +3 位作者 王轶栋 陈卫平 张明 陈立龙 《阀门》 2024年第8期927-935,共9页
目前高参数高压差控制阀广泛采用迷宫式和多级套筒式结构,由于迷宫片的工艺结构因素(每一碟片流道间均存在轴向上的高度)和多级套筒式(笼罩式)开孔布局等情况,均存在流量控制调节死区问题,即控制阀的流量特性曲线不是连续变化的。通过... 目前高参数高压差控制阀广泛采用迷宫式和多级套筒式结构,由于迷宫片的工艺结构因素(每一碟片流道间均存在轴向上的高度)和多级套筒式(笼罩式)开孔布局等情况,均存在流量控制调节死区问题,即控制阀的流量特性曲线不是连续变化的。通过对套筒式(笼罩式)节流元件进行大量研究和模拟试验,在流量调节控制无死区方面有所创新和突破,解决了控制类阀门内件等关键零部件设计的重大问题。经多家用户长期使用,证明该控制阀具有调节性能好、无调节死区、工作可靠等特点。 展开更多
关键词 高参数 高压差 控制阀 流量调节 无死区
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