Pressure Compensated Electro-Hydraulic Proportional Flow Control Valve

1978 ◽  
Author(s):  
Kishor Patel
Keyword(s):  
Flow Control ◽  
Control Valve ◽  
Flow Control Valve ◽  
Proportional Flow

Proportional Flow Control Valve for Construction Vehicle

2019 ◽  
Author(s):  
So-Nam Yun ◽  
Yang-Lae Lee ◽  
Haroon Ahmad Khan ◽  
Chang-Nam Kang ◽  
Young-Bog Ham ◽  
...  
Keyword(s):  
Flow Control ◽  
Control Valve ◽  
Flow Control Valve ◽  
Proportional Flow

Analysis and Modification of the Design of Fluid Power Control System for the Improvement of Product Quality

2013 ◽  
Author(s):  
Tahany W. Sadak ◽  
Taha E. Mkawee
Keyword(s):  
Flow Control ◽  
Flow Rate ◽  
System Performance ◽  
Dynamic Performance ◽  
Control Valve ◽  
Operating Conditions ◽  
Flow Control Valve ◽  
Supply Pressure ◽  
System Designs ◽  
Proportional Flow

This research investigation is focused on providing system performance under different operating conditions, with special focus on variations in the supply pressure. The investigations have been carried out for different system designs. The analysis of the results introduces the effect of system designs on its static and dynamic performance. Also, the investigations provide the effect of variations of system operating conditions and load value. A hydraulic system has been designed with variable velocity, pressure and load. The detailed examination has been carried out on a system that consists of a hydraulic power supply unit, control valves (pressure control valve, flow control valve, throttle valve and directional control valve). We have investigated the effect of adding a flow control valve (FCV) in the chosen circuit and also replacing the FCV with a proportional flow control valve (PFCV). In order to study the effect of this valve on system performance we examine the role of change of operating conditions and loading values on the system performance. Thus the displacement and speed of the piston of the hydraulic cylinder has been experimented under different values of supply pressure, flow rate, and load. We make this investigation to develop the performance evaluation by replacing the (FCV) by proportional flow control valve (PFCV) via position control so that one can achieve the static and dynamic performance of the system more accurate. Apparent improvement in flow rate ranges from 8% to 29.5% and dynamic response from 30 to 64%. The results reveal that this methodology allows one to achieve high quality of the product.

Characteristics Analysis of Proportional Control Valve on Vane Damp

2014 ◽  
Vol 541-542 ◽  
pp. 1266-1270
Author(s):  
Wen Rui Wang ◽  
Yue Lei Yin
Keyword(s):  
Flow Control ◽  
Control Valve ◽  
Flow Control Valve ◽  
Proportional Control ◽  
Damping Characteristics ◽  
Characteristics Analysis ◽  
Execution Unit ◽  
Relationship Of ◽  
The Relationship ◽  
Proportional Flow

The proportional flow control valve is not only one of the key competent of vane damp,but also the execution unit of shock absorber damping force's regulation .The proportional flow control valves self-designed will combine the structural design of proportional control valve and crate CFD model . The thesis analyzes its distribution of flow field by CFD and acquires experimental validation .It analyzes dynamic characteristics and determine the relationship of flow and opening and drive current. The proportional control valve test verifies the correctness, finally. It is basis for analyzing of damping characteristics about vane damp, which can be used other proportional control valve CFD study.

Proportional Flow Control Valve with PZT Actuator

2005 ◽  
Vol 42 (11) ◽  
pp. 758-762
Author(s):  
So Nam Yun ◽  
Chan-Yong Kim ◽  
Young-Bog Ham ◽  
Seok-Jin Yoon ◽  
Kyung Woo Lee
Keyword(s):  
Flow Control ◽  
Control Valve ◽  
Flow Control Valve ◽  
Pzt Actuator ◽  
Proportional Flow

Rowing Force and its Simulation on Training Facility

2009 ◽  
Vol 147-149 ◽  
pp. 712-715 ◽  
Author(s):  
Vytautas Grigas ◽  
Aurelijus Domeika ◽  
Alexandra Legha ◽  
Danguole Satkunskiene ◽  
Rymantas Tadas Toločka
Keyword(s):  
Flow Control ◽  
Control Valve ◽  
Experimental Measurements ◽  
Flow Control Valve ◽  
The Novel ◽  
Training Facility ◽  
Hydrodynamic Loading ◽  
Significant Difference ◽  
Pool Type ◽  
Proportional Flow

The paper presents results of experimental measurements of the parameters of rowing process when rowing in a river, on the pool-type training facility and on “Concept II” rowing machine. The comparison of results of measurements showed the significant difference of rowing force generated by rowing in the machine and in the boat, thus the novel training facility is proposed having the hydrodynamic loading unit equipped with proportional flow control valve controlled by computer evaluating parameters of rowing, which is able to ensure loading on the oars more adequate to the real rowing conditions.

Performance of Proportional Flow Valve With Pilot Pressure Drop—Spool Opening Compensation

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Jiahai Huang ◽  
Jiangjiao Dai ◽  
Long Quan ◽  
Yuan Lan
Keyword(s):  
Pressure Drop ◽  
Flow Control ◽  
Pressure Sensors ◽  
Control Valve ◽  
Input Voltage ◽  
Analytical Models ◽  
Main Stage ◽  
Flow Control Valve ◽  
Proportional Flow ◽  
Pilot Valve

Flow control valves are extensively used to control the motion of hydraulic actuators in industry. In this paper, a two-stage proportional flow control valve with pilot digital pressure compensator is presented. The proposed valve is composed of two pressure sensors, a proportional pilot valve, a Valvistor poppet valve (main stage), and an electronic controller. The pressure drop across the pilot valve metering orifice is detected by two pressure sensors and fed into the controller which changes the pilot valve input voltage to compensate pressure influence on the outlet flow. The presented valve is investigated theoretically by simplified analytical models as well as numerical methods and also evaluated experimentally. The results show that the proposed scheme is feasible. It has a reasonable static performance and an acceptable dynamic characteristic for low bandwidth disturbances. The flow force on the Valvistor poppet should be estimated and considered in the controller design.

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