scholarly journals Research of the automated drive of manual hydraulic valves of the manipulator

2017 ◽  
Vol 6 (4) ◽  
pp. 194-201
Author(s):  
Бухтояров ◽  
Leonid Bukhtoyarov ◽  
Лысыч ◽  
Mikhail Lysych ◽  
Туровский ◽  
...  
Keyword(s):  
Control Valve ◽  
Theoretical Research ◽  
Hydraulic Control ◽  
Directional Control ◽  
Solid Works ◽  
The Cost ◽  
Aided Design ◽  
Drive Model ◽  
Hydraulic Valves ◽  
Directional Control Valve

The authors offer an automated drive design based on stepper motor which is mounted directly on the hydraulic control valve with manual control. This approach eliminates rework most of the hydraulic system, which significantly reduces the cost and the complexity of the process of modernization. When the drive was planning to use the medium-aided design SolidWorks. Within the theoretical research car-ried out kinematic and dynamic issledovaniyaprotsessa with joystick control. For this purpose calculated 3D-drive model with a directional control valve and the application for engineering calculations Solid-Works Simulation.

scholarly journals The Characteristic Improvement of Electromagnetic Proportional Directional Control Valve

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Hua Zhang
Keyword(s):  
Temperature Rise ◽  
Electromagnetic Force ◽  
Optimization Design ◽  
Control Valve ◽  
Hydraulic Control ◽  
The Finite Element Method ◽  
Directional Control ◽  
Burn Out ◽  
High Temperature Rise ◽  
Directional Control Valve

The electromagnetic proportional directional control valve is widely used in hydraulic control system and its typical faults are not enough electromagnetic force and too high temperature rise to burn out the coil. The magnetic field and coil temperature field distribution of the control valve are modeled and analyzed by using the finite element method. The influence laws of the geometry and parameters on electromagnetic force are analyzed. Furthermore, the influence of coil control current and heat transfer coefficient on the temperature rise of coil is analyzed, which provides a theoretical basis for the reliability optimization design of electromagnetic proportional directional control valve.

scholarly journals Dynamic behaviour of pneumatic actuators in open-loop controlled by proportional valves

2020 ◽  
Vol 180 ◽  
pp. 04012
Author(s):  
Valentin Nicolae Cococi ◽  
Carmen-Anca Safta ◽  
Constantin Călinoiu
Keyword(s):  
Control Valve ◽  
Open Loop ◽  
Pneumatic Actuator ◽  
Control Technique ◽  
Hydraulic Control ◽  
Pneumatic Actuators ◽  
Pneumatic Control ◽  
Directional Control ◽  
New Generation ◽  
Directional Control Valve

The development of proportional and servo-mechanisms hydraulic control technique offered the premises of the development of pneumatic control, too. Despite the disadvantages of the nonlinearities appeared in the pneumatic systems (air compressibility being one of the causes), the new generation of proportional equipment made it possible to have a good quality pneumatic control system in our days. The goal of the paper is to demonstrate, by using numerical simulation technique, that the proportional valves used in pneumatic actuator drives occur at a good system dynamic at a reasonable cost as against to the directional control valve as it usually used in pneumatic actuator drives.

Impact of Long Hydraulic Pipeline upon Performance of Hydraulic Control System

2011 ◽  
Vol 328-330 ◽  
pp. 2148-2151
Author(s):  
Ya Nan Zhao ◽  
Hong Wang Du ◽  
Yu Mei Li ◽  
Xiang Luo ◽  
Gang Liu
Keyword(s):  
Pressure Sensors ◽  
Control Valve ◽  
Hydraulic Cylinder ◽  
Hydraulic Control ◽  
Relief Valve ◽  
Supply Pressure ◽  
Directional Control ◽  
Cylinder Piston ◽  
The Impact ◽  
Directional Control Valve

In ocean exploitation, long hydraulic pipelines are usually applied. Using SimHydraulic software, the model of hydraulic system including hydraulic fluid, pump, hydraulic cylinder, directional control valve, relief valve, accumulator, long supply pipeline and return pipeline, is established. The position of the cylinder piston is measured by position sensor, while the supply pressure of the cylinder and the system supply pressure are measured by pressure sensors, the directional control valve is controlled by an on-off signal. The simulation was carried out, the impact of long hydraulic pipeline on system performance is also analyzed.

Analysis and Simulation on Drive Characteristic of High-Strength Water Hydraulic Artificial Muscle

2014 ◽  
Vol 889-890 ◽  
pp. 488-492
Author(s):  
Zeng Meng Zhang ◽  
Jiao Yi Hou ◽  
Zheng Wen Sun ◽  
Yong Jun Gong ◽  
Jian Miao
Keyword(s):  
Flow Rate ◽  
Control Valve ◽  
Artificial Muscle ◽  
High Strength ◽  
Hydraulic Control ◽  
Hydraulic Circuit ◽  
Water Hydraulic ◽  
The Difference ◽  
Hydraulic Valves ◽  
Load Mass

Driving processes and characteristics are different between the water hydraulic artificial muscle and pneumatic artificial muscle due to the difference of work media employed in muscles. An appropriative hydraulic circuit was designed to control the pressure of the water hydraulic artificial muscle and the performance of this system was analyzed. An AMESim model of the control system was built and the dynamic characteristics are analyzed with various parameters of the hydraulic circuit and various loads by simulation. The results show that the performance of the water hydraulic control valve should agree with the dimension of the water hydraulic artificial muscle. The rated flow rate of the water hydraulic valves can be selected increasingly while the load mass is low. Meanwhile, the overshoot is generated and enlarged along with the increases of the flow rate and load mass. These contribute to the improvements of designs and researches on control systems of water hydraulic artificial muscles.

Study on Static and Dynamic Characteristics of Load-Sensing and Pressure-Compensated Directional Control Valve

2013 ◽  
Vol 753-755 ◽  
pp. 2693-2699 ◽  
Author(s):  
Rui Lin Feng ◽  
Jian Hua Wei ◽  
Jin Hui Fang
Keyword(s):  
Transfer Function ◽  
Working Conditions ◽  
Dynamic Characteristics ◽  
Pressure Coefficient ◽  
Control Valve ◽  
Parameters Optimization ◽  
Static And Dynamic Characteristics ◽  
Load Sensing ◽  
Directional Control ◽  
Directional Control Valve

This study presents the static and dynamic characteristics of load-sensing and pressure-compensated directional control valve under the working conditions. A mathematical model is developed, two types of working conditions are presented through the static work point calculation. The static characteristic is analyzed by simulation, and the conclusion is validated by experiments. Solution procedure of the flow gain transfer function and flow-pressure coefficient transfer function is detailed introduced based on the above static computation, and their dynamic characteristic is analyzed by using Bode diagram. Finally, three types of compensatory modes are proposed, which provides very useful value and significance for the hydraulic component or system design and parameters optimization.

scholarly journals Transient Phenomena Caused by Directional Control Valve in a Hydraulic Pipeline

1973 ◽  
Vol 16 (102) ◽  
pp. 1911-1917 ◽  
Author(s):  
Koji TAKAHASHI ◽  
Shigeru IKEO ◽  
Yoneaki TAKAHASHI
Keyword(s):  
Control Valve ◽  
Transient Phenomena ◽  
Directional Control ◽  
Directional Control Valve
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