Modelling and analysis for a pilot relief valve using CFD method and deformation theory of thin plates

Li, Ziyue; Guo, Konghui

doi:10.1007/s11431-015-5822-3

Cited by 12 publications

(4 citation statements)

References 48 publications

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“…[8]. It is also necessary to consider the effects of possible deformations of the poppet rigid body and its seat in some cases [9,10]. However deformation of the rigid body is not included in this study.…”

Section: Equation Of Motionmentioning

confidence: 99%

Analysis of in-line check valve with respect to the pipeline dynamics

Klas

Rudolf

2017

EPJ Web Conf.

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The following study is focused on the flow analysis within the concentric in-line check valve. In-line check valve is part of the pipe and shut off the stream of fluid. In case that backflow occurs on the downstream side, the valve is fully or partially lifted and then abruptly closes. This effect brings undesirable pressure shocks in the entire system. The study therefore deals with the CFD analysis of steady and unsteady flow with respect to velocity and pressure field. Especially unsteady calculation mode reflects the influence of local inertial acceleration acting on the fluid and on the valve. Analysis is complemented by equation of motion of a valve which interacts with the fluid.

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Section: Equation Of Motionmentioning

confidence: 99%

Analysis of in-line check valve with respect to the pipeline dynamics

Klas

Rudolf

2017

EPJ Web Conf.

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“…The pressure vibration was simulated by a sine-wave pressure source. The mass flow rate G d through the orifice and porous materials were obtained from equations (1) and (3). The volume in the diaphragm chamber 17 was assumed to be constant, and the ideal gas equation applied was the following…”

Section: Mathematical Model Of Pneumatic Rc Circuitmentioning

confidence: 99%

“…Lv et al 2 presented the flow field characteristics in a flapper-nozzle pilot valve when the flapper is moving, which reflects the actual operational conditions. Yuan and Guo 3 developed complete models of the pilot relief valve using deformation theory of thin plates. Qian et al 4,5 analyzed the dynamic flow characteristics and cavitation characteristics in a pilot-control globe valve.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of pilot valve system using linear flow resistance

Peng

Youn

Takeuchi

et al. 2017

Advances in Mechanical Engineering

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In a pilot valve system, the pressure in the control chamber of the main valve is straightforwardly affected by pressure oscillation in the downstream pipeline or the pilot tube. To solve this problem, an orifice is generally installed in the pilot tube to restrain the oscillation. However, the orifice is a nonlinear flow resistance; the amplitude of the oscillation alters the gain curve of the control pressure response. In this study, a linear flow resistance such as a porous material is employed to stabilize the pilot valve system. A test pilot valve was manufactured, and a pilot valve system was developed in the laboratory of the authors of this article. A mathematical model of the pilot valve system using linear and nonlinear flow resistances was simulated in MATLAB. The linearity of the P-Q characteristics of the linear flow resistance was confirmed, and a series of frequency response experiments were performed to examine the dynamic characteristics of the pilot valve system with various flow resistances. The experimental results were in accord with the simulation results. This implied that when porous materials were used in the pilot valve system, the gain of the pressure response did not vary regardless of the varying pressure vibration amplitude. Therefore, porous materials are suitable to be used in the pilot valve system instead of an orifice to enhance its stability.

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“…e difference in the valve element cavity volume and roundedness of water pressure relief valve's cavitation flow field were simulated and analyzed [24]. Yuan et al modeled and analyzed a pilot relief valve and presented the flow force by using computational fluid dynamics (CFD) method, which brought a systematic method for designing and analyzing similar valves [25]. Bossard et al analyzed the dynamic performance of the Target Rock Pressure Relief Valve by using Generalized Fluid System Simulation Program (GFSSP), which would accommodate both the fluid dynamic features of the valve operation and the kinematic characteristics of the valve during pressure relief valve operation [26].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis of Digital Emulsion Relief Valve Based on the Hydraulic Loading System

Wan

Dai

Zeng

et al. 2020

Shock and Vibration

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In the hydraulic loading system, the performance of digital relief valve plays an important role in the dynamic response of load. However, the research on large-flow emulsion relief valve is still far from perfect. In this paper, digital relief valve is taken as the research object. Based on pilot-operated relief valve, a digital control scheme using a linear stepping motor is adopted to regulate the working pressure of relief valve. The structure of relief valve is analyzed and optimized from the aspects of dynamic and internal flow field characteristics to obtain a good working performance. To obtain its accurate working characteristic, the structural model and digital control system of relief valve are established by AMESim and Simulink, respectively, for electrohydraulic cosimulation. The results show that digital relief valve has a better characteristic of real-time dynamic pressure regulation. Therefore, the digital control system could improve the dynamic performance of relief valve, and the design of digital relief valve structure is reasonable and feasible. The simulation method employed in this paper provides a better theoretical basis and reference for the comprehensive research of digital large-flow emulsion relief valves based on the hydraulic loading system.

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Modelling and analysis for a pilot relief valve using CFD method and deformation theory of thin plates

Cited by 12 publications

References 48 publications

Analysis of in-line check valve with respect to the pipeline dynamics

Analysis of in-line check valve with respect to the pipeline dynamics

Stabilization of pilot valve system using linear flow resistance

Characteristic Analysis of Digital Emulsion Relief Valve Based on the Hydraulic Loading System

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