Static Characteristics of Pressure Control Valve

Abstract The article deals with the measurement of static characteristics of a pressure control valve. The pressure, at which the valve starts to leak oil, is adjusted by a spring. The measurement is performed on a hydraulic system that consists of tank, hydraulic pump, check valve, relief valve and pressure control valve which is measured. The results of this experimental measurement are Δp - Q characteristics of the pressure control valve for various pressure settings.

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Development and Analysis of Small Scale Water Accumulator by Using Piston Type

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.761.191 ◽

2015 ◽

Vol 761 ◽

pp. 191-195

Author(s):

Mohd Noor Asril Saadun ◽

Ahmad Anas Yusof ◽

Muhammad Ismail Zakaria

Keyword(s):

Hydraulic System ◽

Environmental Concern ◽

Control Valve ◽

Pressure Control ◽

Small Scale ◽

Auxiliary Component ◽

Hydraulic Hybrid ◽

Directional Control ◽

Weighing Method ◽

Pressure Control Valve

An accumulator is an auxiliary component in a hydraulic system as it stores the energy and avoids the pump from running continuously through the system which can reduce the pumps life. The accumulator is also used as the power source in the hydraulic hybrid system to accelerate the vehicle. A common hydraulic system uses the hydraulic oil as their working medium, but there is an application using water due to the high accessibility and environmental concern. In this paper, an accumulator is developed by using weighing method to increase the pressure in the system. This system uses water as a medium to provide clean environment as well as safe for mobile purpose. The system includes electric motor, water pump, directional control valve, pressure control valve and motor hydraulic. The performance of the accumulator is obtained by measuring the ratio of output and input pressure. The source of electricity is varied by using an inverter to control the frequency and the power of the pump. From the experiment, the pressure output and flow rate decreased with the increasing of the loads on top of the accumulator, while the pressure loss increased with the number of load. The operational frequency is optimal at a low reading compared to a higher frequency.

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Effect of Parameter on Characteristics of Active Charge Accumulator for Water Hydraulic System

Volume 1A: Symposia, Part 2 ◽

10.1115/ajkfluids2015-11456 ◽

2015 ◽

Author(s):

Futoshi Yoshida ◽

Kenji Ito ◽

Shouichiro Iio ◽

Ato Kitagawa

Keyword(s):

Hydraulic System ◽

Basic Characteristic ◽

Experimental Approach ◽

Control Valve ◽

Pressure Change ◽

Pressure Control ◽

Output Flow ◽

Water Hydraulic ◽

Pressure Control Valve ◽

Piston Stroke

Active Charge Accumulator (ACA) is a new pressure convert technology which does not require any pressure control valve. ACA can be easily reduce or boost the pressure in water hydraulic system by using a multistage piston and on-off valves. This paper was focused on the basic characteristic of ACA especially for decompression process. The both of experimental approach and theoretical one were conducted. As the experimental results, it is revealed that the piston stroke of ACA strongly depends on the output flow rate and switching timing of the on-off valves. Analytical model of ACA was made and validated. As a result, it can be revealed influence of parameters on characteristics of ACA. The pressure change in the system was well estimated by the model.

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Failure analysis on the bolt fracture of pressure control valve in power plant

2020 5th International Conference on Mechanical, Control and Computer Engineering (ICMCCE) ◽

10.1109/icmcce51767.2020.00174 ◽

2020 ◽

Author(s):

Jun Si ◽

Huating Lv ◽

Facai Ren ◽

Bin Ren

Keyword(s):

Power Plant ◽

Failure Analysis ◽

Control Valve ◽

Pressure Control ◽

Pressure Control Valve

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Damping of Self-Excited Pressure Pulsations in Petrodiesel Pipeline

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.630.375 ◽

2014 ◽

Vol 630 ◽

pp. 375-382 ◽

Cited By ~ 3

Author(s):

Daniel Himr ◽

Vladimir Haban

Keyword(s):

Hydraulic System ◽

Check Valve ◽

Control Valve ◽

Sampling Frequency ◽

Pressure Pulsations ◽

One Dimensional ◽

Fuel Storage ◽

Excited Oscillation ◽

Subsequent Measurement ◽

And Control

A pumping station in a fuel storage suffered from pressure pulsations in a petrodiesel pipeline. Check valves protecting the station against back flow made a big noise when disc hit a seat. Due to employees complaints we were asked to solve the problem, which could lead to serious mechanical problems. Pressure measurement in the pipeline showed great pulsations, which were caused by self-excited oscillation of control valves at the downstream end of pipeline. The operating measurement did not catch it because of too low sampling frequency. One dimensional numerical model of the whole hydraulic system was carried out. The model consisted of check valve, pipeline and control valve, which could oscillate, so it was possible to simulate the unsteady flow. When the model was validated, a vessel with nitrogen was added to attenuate pressure pulsations. According to the results of numerical simulation, the vessel was installed on the location. Subsequent measurement proved noticeably lower pulsations and almost no noise.

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