Simulation and Result Analysis of AMEsim for the Relief Valve Dynamic Characteristics Experiment

2010 ◽  
Author(s):  
Xiu Lei ◽  
Yajun Wu
Keyword(s):  
Dynamic Characteristics ◽  
Relief Valve ◽  
Result Analysis

scholarly journals Numerical Analysis of the Dynamic Characteristics of a Balanced Piston Type Relief Valve. 2nd Report. Stability of a Relief Valve.

1997 ◽  
Vol 28 (2) ◽  
pp. 239-244
Author(s):  
Satoru HAYASHI ◽  
Yuji IIZUKA ◽  
Ikuro IIMURA ◽  
Toshiyuki HAYASE
Keyword(s):  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
Relief Valve

The static and dynamic characteristics of a pressure relief valve with a proportional solenoid-controlled pilot stage

2002 ◽  
Vol 216 (2) ◽  
pp. 143-156 ◽  
Author(s):  
R Maiti ◽  
R Saha ◽  
J Watton
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Dynamic Behaviour ◽  
Practical Experience ◽  
Pressure Relief Valve ◽  
Relief Valve ◽  
Pressure Relief ◽  
Static And Dynamic Characteristics ◽  
Good Comparison ◽  
The Mathematical Model

The steady state and dynamic characteristics of a two-stage pressure relief valve with proportional solenoid control of the pilot stage is studied theoretically as well as experimentally. The mathematical model is studied within the MATLAB-SIMULINK environment and the non-linearities have been considered via the use of appropriate SIMULINK blocks. The detailed modelling has resulted in a good comparison between simulation and measurement, albeit assumptions had to be made regarding the solenoid dynamic characteristic based upon practical experience. The use of this characteristic combined with additional dynamic terms not previously considered allows new estimations of internal characteristics to be made such as the damping flowrate. The overall dynamic behaviour has been shown to be dominated by the solenoid characteristic relating force to applied voltage.

State-of-the-Art Review of Pressure Relief Valve Design, Testing and Modeling

1991 ◽  
Vol 113 (1) ◽  
pp. 46-54 ◽  
Author(s):  
P. M. Petherick ◽  
A. M. Birk
Keyword(s):  
Dynamic Characteristics ◽  
Nuclear Power ◽  
Literature Search ◽  
Failure Modes ◽  
State Of The Art ◽  
Experimental Studies ◽  
Pressure Relief Valve ◽  
Operating Characteristics ◽  
Relief Valve ◽  
Pressure Relief

It is well known that the response of a rail tank car to exterior heating (e.g., fire engulfment) is significantly affected by the operating characteristics of the pressure relief valve (PRV). If the valve jams or fails in some way, it can lead to a violent vessel rupture; therefore, PRV failure modes and mechanisms must be understood. This paper investigates the studies which have been conducted in the area of PRV technology. The original focus of the paper was to conduct a literature search to find the state-of-the-art for the PRV’s which are presently installed on railway tank cars, highway tankers, and stationary LPG storage vessels. When few papers were found which had concentrated on this particular topic, the authors continued the search by considering both the nuclear power and chemical processing industries, where similar technologies are found. The results of the literature search suggest that the PRV’s currently installed on tank cars and highway tankers are based on designs more than 30 yr old. Controlled fire tests and industry’s maintenance programs suggest that PRV’s could be improved. Most experimental studies of PRV’s have concentrated on flow visualization techniques and have not considered PRV dynamic characteristics. The lack of understanding of valve dynamic characteristics has slowed the development of improved PRV dynamic computer models.

Dynamic Characteristics Modeling and Simulating for Fixed Differential Overflow Valve by Power Bond Graph

2011 ◽  
Vol 101-102 ◽  
pp. 283-289
Author(s):  
Ji Kang Bo
Keyword(s):  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Bond Graph ◽  
Hydraulic Circuit ◽  
Dynamics Model ◽  
Relief Valve ◽  
Cylinder Piston ◽  
Power Bond Graph ◽  
Computerized Simulation ◽  
Mathematical Characteristics

This paper introduces the dynamics model and mathematical characteristics of the constant difference of overflowing pressure with computerized simulation by power bond graph of the fixed differential relief valve hydraulic system on simplified vertical planetary internal grinder, which puts forth proposals to design hydraulic circuit or component. Simulation shows that, when the load changes more than 50%, the speed of cylinder piston changes less than 0.31%, and the efficiency of the hydraulic system has also been greatly improved, which matches the experiments. It makes certain reference to the design of the hydraulic system in which the load changes large.

scholarly journals Analysis of Dynamic Characteristics of Pressure-Regulating and Pressure-Limiting Combined Relief Valve

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Rui Shi ◽  
Chuanli Wang ◽  
Tao He ◽  
Tian Xie
Keyword(s):  
Response Time ◽  
Dynamic Characteristics ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
Characteristic Analysis ◽  
Relief Valve ◽  
Effective Force ◽  
Fluid Resistance ◽  
Large Pressure ◽  
Pressure Stabilization

Aiming at the problem of the lack of a cooperation mechanism of combined relief valves, this paper proposes a new pressure-regulating and pressure-limiting combined relief valve. Combined with the ordinary relief valve dynamic characteristic analysis method, the dynamic model of the combined relief valve under normal working conditions was established, and its dynamic characteristics were simulated using Simulink. The results showed that the multi-pressure stabilization design of the combined relief valve improves its usability and stability. Under the same structural parameters, the overshoot of the combined relief valve was 5.7%, and the response time was 12 ms, which is better than the ordinary relief valve. Besides, it effectively improves the instability problems, such as the vibration and the large pressure fluctuation of the ordinary relief valve under high pressure and large flow conditions. When the sum of the effective force area on the upper side of the flange of the pressure-regulating valve core and the area of the tail vertebra is equal to the effective force area of the lower side of the flange of the pressure-regulating valve core, the dynamic performance of the relief valve is optimal. For example, if the effective force area under the flange is 1.8 cm2, then the inlet pressure overshoot is 2.8%, and the response time is 10 ms. An appropriate volume of the sensitive cavity, the quality of the valve core, and the fluid resistance of the pressure relief valve are factors that can effectively improve the dynamic performance of the pressure-regulating and pressure-limiting combined relief valve.

Static and Dynamic Characteristics of a Two Stage Pilot Relief Valve

1991 ◽  
Vol 113 (2) ◽  
pp. 280-288 ◽  
Author(s):  
Yung C. Shin
Keyword(s):  
Sensitivity Analysis ◽  
Computer Simulation ◽  
Dynamic Characteristics ◽  
Dynamic Equations ◽  
Governing Equations ◽  
Relief Valve ◽  
Two Stage ◽  
Static And Dynamic Characteristics ◽  
Response Characteristics ◽  
Simulation Results

Static and dynamic characteristics of a two stage relief valve have been studied theoretically and experimentally. The governing equations of the valve have been derived and sensitivity analysis was performed by digital computer simulation on the valve response characteristics based on the established dynamic equations of the motions of the valve. From this study, significant parameters on the valve response were identified, which can be modified to improve the dynamic characteristics of the valve. Subsequently, experiments were performed with a specially fabricated Vickers type pilot relief valve. The results showed fair agreement with the simulation results, thus proving the validity of the model.

Flow model and dynamic characteristics of a direct spring loaded poppet relief valve

2017 ◽  
Vol 232 (9) ◽  
pp. 1657-1664 ◽  
Author(s):  
Junbo Lei ◽  
Jianfeng Tao ◽  
Chengliang Liu ◽  
Yajin Wu
Keyword(s):  
Dynamic Model ◽  
Dynamic Characteristics ◽  
Discharge Coefficient ◽  
Flow Model ◽  
Body Motion ◽  
General Shape ◽  
Relief Valve ◽  
Valve Body ◽  
Fluid Forces ◽  
Poppet Valve

This paper is concerned with the flow model and dynamic characteristics of the poppet relief valve. The flow model of the poppet valve orifice is established with a novel function of flow discharge coefficient, and the dynamic model including the aforementioned flow model of the poppet valve is established with consideration of the fluid forces caused by the valve body motion and the flowrate variation. Both the simulated and measured results of the dynamic response of the poppet relief valve shows that the experimental and simulation results are in fine accordance with each other in the perspective of the general shape of response, which confirm that the dynamic model of the poppet relief valve proposed in this paper is both accurate and efficient.

Sign in / Sign up

Export Citation Format

Share Document