Theoretical and Experimental Research on a Three-Way Water Hydraulic Pressure Reducing Valve

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Xiaofeng He ◽  
Daoxin Zhao ◽  
Xiao Sun ◽  
Bihai Zhu
Keyword(s):  
Dynamic Performance ◽  
Orifice Diameter ◽  
Hydraulic Pressure ◽  
Flow State ◽  
Working Pressure ◽  
Simulation And Optimization ◽  
Pressure Step ◽  
Small Flow ◽  
Water Hydraulic ◽  
Pressure Reducing Valve

A three-way water hydraulic pressure reducing valve (PRV) was developed in this paper for a test equipment in laboratory for adapting complex conditions. The designed PRV has a damping chamber with an orifice located at the spring chamber. Two types of throttles and orifice diameter were investigated through dynamic simulation and optimization, and their dimensions were determined and applied to the manufactured valve prototype. The static and dynamic performances of the valve were tested by experiments. At the preset pressure of 5.0 MPa, the outlet pressure variations for the pressure-reducing port and the relief port, are 0.73 MPa and 1.44 MPa, respectively, while the flow variation is up to 18.0 l/min. The experimental rising times and settling times of the PRV under the inlet pressure step for preset pressures of 5.0 MPa are 33.7 ms and 120.2 ms, respectively, and the overshoot is 3.76%. The test results at each preset pressure agree well with the simulation which verifies that the simulation model can be used to predict the dynamic performance of the PRV. The experimental results for the valve under flow step input conclude that it can work stably at small flow state. The research indicates that making the spring chamber a damping chamber by using an orifice is a feasible way to increase the pressure stability and the dynamic performance of the PRV. However, the damping effect of this structure is insufficient at high working pressure.

Optimization and Simulation on Pressure-Reducing Valve in Water Hydraulic Vane Pump

2013 ◽  
Vol 842 ◽  
pp. 569-573 ◽  
Author(s):  
Xiao Feng He ◽  
Ben Deng ◽  
Xing Huang ◽  
Xue Wen Yan
Keyword(s):  
Dynamic Performance ◽  
Great Influence ◽  
Contact Forces ◽  
Bottom Pressure ◽  
Vane Pump ◽  
Working Pressure ◽  
Water Hydraulic ◽  
Optimization And Simulation ◽  
Rectangular Groove ◽  
Pressure Reducing Valve

High contact stress between the vane tips and the cam ring is one of the main obstacles to improve the working pressure of a water hydraulic vane pump. A pressure-reducing valve for regulating the bottom pressure of the vanes at the pump suction zone is presented in this paper. Through optimization and simulation, it is found that the throttle structure has great influence on the dynamic performance of the pressure-reducing valve, and the triangular-rectangular groove is proved to be more suitable for the valve among all the investigated grooves. The theoretical analysis results show that the use of the pressure reducing valve can obviously reduce the contact forces between the cam ring and the vanes at the suction zone of the pump. The work in this research provides a feasible solution to improve the working pressure of a water hydraulic vane pump.

Theoretical and Experimental Research on a Pressure-Reducing Valve for a Water Hydraulic Vane Pump

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Liang Luo ◽  
Xiaofeng He ◽  
Ben Den ◽  
Xing Huang
Keyword(s):  
Constant Pressure ◽  
Pressure Ratio ◽  
Vane Pump ◽  
Successful Development ◽  
Working Pressure ◽  
Valve Body ◽  
Pressure Water ◽  
Water Hydraulic ◽  
Leakage Characteristics ◽  
Pressure Reducing Valve

In order to control the high PV value between the vanes and the cam ring in a water hydraulic vane pump, a pressure-reducing valve with a constant pressure ratio was developed in this study. The pressure and leakage characteristics of the valve were theoretically analyzed by simulation and the experiments were also conducted based on the valve prototype. The theoretical analysis agrees well with the experimental results. Further, these results reveal that the pressure ratio of the valve decreases to the design value with the increasing working pressure. Additionally, the leakage of the valve rises simultaneously with the increasing working pressure and can be reduced significantly by decreasing the clearance between the valve body and the spool. The presented research not only proves the successful development of the pressure-reducing valve but also lays a foundation for the investigation of a high-pressure water hydraulic vane pump.

scholarly journals Development of a Rotary Type Water Hydraulic Pressure Intensifier

2009 ◽  
Vol 2 (2) ◽  
pp. 21-26
Author(s):  
Shigeru OSHIMA ◽  
Takuya HIRANO ◽  
Shimpei MIYAKAWA ◽  
Yoshihiro OHBAYASHI
Keyword(s):  
Hydraulic Pressure ◽  
Water Hydraulic ◽  
Type Water ◽  
Rotary Type

Numerical Research on Flow Field for Petroleum Tar Cutting Pump

2013 ◽  
Author(s):  
Jing-ning Hu ◽  
Jing Wang ◽  
Rengui Gu ◽  
Ying-ying Tian ◽  
Qun Ye
Keyword(s):  
Flow Field ◽  
Flow Rate ◽  
Tilt Angle ◽  
Fluid Dynamic ◽  
Reference Value ◽  
Flow State ◽  
Solid Concentration ◽  
Two Phase ◽  
Revolution Speed ◽  
Small Flow

In order to study the flow state and distribution of the solid particle in the flow field of petroleum tar cutting pump, the Computational Fluid Dynamic method was used to conduct the numerical simulation of liquid-solid two-phase flow based on Euler-Euler multiphase flow model and standard turbulence equation. The influence of flow rate, revolution speed and tilt angle of stator slot on streamline and distribution of solid concentration were analyzed. The result shows:strong swirl exists in inlet segment in small flow rate, but flow rate has little influence on the solid concentration, so it has no obvious influence on the cutting and grinding efficiency.Grinding efficiency could be improved by increasing revolution speed, but the requirement for the equipment would be higher, so the revolution speed should be determined reasonably. Reducing the tilt angle of stator slot is favor for improving the grinding and cutting efficiency, so it could provide some reference value for the optimal design.

Development of the Small Flow Rate Water Hydraulic Servo Valve

2010 ◽  
Vol 22 (3) ◽  
pp. 333-340 ◽  
Author(s):  
Toshiya Watanabe ◽  
◽  
Tomokazu Inayama ◽  
Takeo Oomichi
Keyword(s):  
Flow Rate ◽  
Servo Valve ◽  
Test And Evaluation ◽  
Small Flow Rate ◽  
Hydraulic Servo ◽  
Small Flow ◽  
Hydraulic Manipulator ◽  
Water Hydraulic ◽  
Leakage Characteristics ◽  
Small Capacity

A small capacity servo valve was developed for a small size water hydraulic manipulator, focusing the saving energy. The new servo valve optimizes the machines small flow rate use, makes the stroke longer for wideband use, reduces leakage and makes control easier. The test and evaluation of the servo valve was conducted by examining flow rate characteristics, leakage characteristics and responsibility. The flow rate and leak rate of the servo valve shows to be the same as the oil hydraulic servo valve, while the step and frequency response show good controllability for the water hydraulic manipulator.

Properties of Hydraulic Floating Caliper Brake for AGV Car

2014 ◽  
Vol 644-650 ◽  
pp. 33-36
Author(s):  
Ai Ran Li ◽  
Yu Jin Fan ◽  
Teng Han ◽  
Zhe Kun Li ◽  
Pei Lin Zhao ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Dynamic Performance ◽  
Performance Comparison ◽  
System Dynamic ◽  
Hydraulic Pressure ◽  
Electromagnetic Brake ◽  
Braking Performance ◽  
Comparison Test

Existing AGV car’s brakes are electromagnet brakes. Brake overheating causes brake damaged during work time.In this paper ,the hydraulic pressure floating caliper brake is applied to the AGV car . It with electromagnetic brake AGV car for braking performance comparison test, through comparative analysis know that hydraulic floating caliper brakes can not only meet the AGV car’s braking requirements and the system dynamic performance has improved greatly.

Simulation and Optimization of the Combustion Process of Diesel Engine

2014 ◽  
Vol 488-489 ◽  
pp. 918-922
Author(s):  
Guan Qiang Ruan ◽  
Zhen Dong Zhang ◽  
Jin Run Cheng
Keyword(s):  
Numerical Calculation ◽  
Diesel Engine ◽  
Mass Fraction ◽  
Fuel Injection ◽  
Dynamic Performance ◽  
Combustion Process ◽  
Engine Fuel ◽  
Cylinder Pressure ◽  
Simulation And Optimization ◽  
Simulation Results

In order to improve the performance of the diesel engine, the original engine fuel injection advance angle is optimized, and a new advance angle of fuel injection is proposed in this paper. By numerical calculation with simulation of software FIRE, the effect of different combustion chamber structures on the cylinder pressure, temperature, accumulated heat release and the parameters such as NOx mass fraction was analyzed. From the simulation results, the optimized fuel injection advance angle had greatly improved the diesel combustion and emission performance. Finally, via experimental verification, the engine with optimized fuel injection advance angle has better dynamic performance, as well as less emission than original machine.

Study on the Integrated Modeling of the Entire Rider-Vehicle-Road System

2010 ◽  
Vol 439-440 ◽  
pp. 1328-1336
Author(s):  
Yong Lin Zhang ◽  
Wei Feng Guo ◽  
Yun Qing Zhang ◽  
Qun Yu
Keyword(s):  
Time Domain ◽  
Evaluation Model ◽  
Dynamic Performance ◽  
Body Movement ◽  
Virtual Prototyping ◽  
Integrated Modeling ◽  
Domain Model ◽  
Efficient Design ◽  
Simulation And Optimization ◽  
Road System

The demands of high-quality dynamic performance and short development time for vehicle production can only be fulfilled by the application of advanced design, simulation and optimization technologies. Virtual prototyping (VP), the analysis and simulation technology based on a fully developed computer model, represents a future way for cost and time efficient design of vehicles and can perform the same as those on the physical prototyping. This paper describes an integrated modeling method, based on the topological structure of a heavy vehicle and oriented to ride dynamics, of a human-vehicle-road system. A multi-body simulation model was chosen as the integration platform for the virtual prototyping since it provided the flexibility to integrate all relevant aspects such as rigid body movement, road-induced vibration and the driver’s responses to the vibration. The time domain model of the stochastic excitation from the road irregularities was numerically reconstructed as input data to VP and the feeling evaluation model in time domain, equivalent to conditional frequency evaluation, was used to the vehicle’s riding comfort simulation. Through integrating the sub-models in VP and combining the data of the sub-models it became possible to predict dynamic performance of vehicles by virtual prototyping technology.

Sign in / Sign up

Export Citation Format

Share Document