Design Of Hydraulic System Research Articles

Vehicle Hydraulic Brake Energy Storage System Design

Simple description the background of hydraulic hybrid technology, scope of application. Put forward the idea of hybrid hydraulic system design based on the car's braking performance, the main elements parameter calculation. Simulation results show that the braking process is smooth, brake energy recovery, the system design and parameter calculation of reasonable.

Hydraulic System Design and Simulation of High-Speed Railway Dynamic Test System Excitation Device

The existing hydraulic excitation mode of valve controlled cylinder or pump controlled motor used in the excitation device of high-speed railway dynamic test system is difficult to meet the requirements of high exciting frequency, high exciting force and high amplitude. To solve these problems, the paper puts forward a bicyclic surface hydraulic cylinder, and designs the corresponding electro-hydraulic servo excitation system. According to the test system parameters，it establishes the mathematical model of the hydraulic system. It uses Matlab/Simulink to carry out theoretical analysis and digital simulation and uses PID Tuner to adjust the PID controller parameters. The simulation results show that the hydraulic excitation system designed meets the performance requirements of the high-speed railway dynamic test system excitation device.

Design and Analysis of Hydro-Viscous Winch Hydraulic System

A hydro-viscous winch comprises a disc brake and a hydro-viscous brake. The hydraulic system is of utmost importance to the performance of the winch. To verify the validity of the hydraulic system, by using AMESim software, the simulation model of the hydraulic system was built and the performance analyzed. The results show that 1) the pressure and the flow rate of the disc brake hydraulic system are mainly affected by the energy accumulator; 2) Hydro-viscous brake hydraulic system pressure and lubricating oil flow rate are influenced by orifice diameter of the throttle valve; 3) during the braking period, the amplitude of the deceleration is rather small and the hydro-viscous winch hydraulic system can meet the requirements well. Research achievements of this work provides theoretical basis for optimal design of the hydro-viscous winch hydraulic system.

Design and Simulation of an Energy-Saving Hydraulic Oil Production System

The study on an advanced equipment of a new pumping unit is presented to satisfy the mining technology demands of large load, long stroke and low pumping speed during petroleum exploitation process. The method of using a full hydraulic system drive rather than the traditional way is adopted to overcome the disadvantages in a traditional oil production equipment such as complex mechanical structure, large volume,many transmissions, low efficiency and high manufacturing cost. In addition, the hydraulic circuit which is made up of an accumulator, a hydraulic motor and two hydraulic pumps is used to realize power recovery for energy saving. The mechanical mathematical model and the hydraulic one of a novel hydraulic oil production mechanism were established and analyzed. Good results are eventually obtained. This equipment has been the national patent.

Hybrid Excavator Test Bed Hydraulic Load System Design

Load system is an important device of hybrid excavator test bed. According to technical requirements of 6 tons hybrid excavator test bed, technique parameters of load system was analyzed and hydraulic load system design scheme based on relief valve was determined. Fundamental diagram of hydraulic load system was designed and working process of load system was introduced. Based on AMESim software, numerical simulation model of hydraulic load system was established. With simulation research, maximum load power and typical load power of load system were simulated. Simulation results show that the hydraulic load system can meet design requirements. Prototype of hydraulic load system was developed and load experiment tests were carried out. Experimental results show that the hydraulic load system can be used to develop hybrid excavator performance test.

Design and Realization of Durability Test-Bed for New Developed Hydraulic Pump

In order to satisfy the practical requirement, Durability test-bed for new developed hydraulic pump is designed which mainly includes design of hydraulic systems, design of data acquisition and processing system and design of test bench and electronic control system. According to application, it shows that the Durability test-bed is effective for durability test of new developed hydraulic pump and it can help to improve the design of hydraulic pump

Design and Realization of Performance Testing System for New Developed Hydraulic Pumps and Valves

In order to ensure the performance of new products, a performance testing system including the design principle, design of hydraulic system and establishment of the computer data acquisition and processing system is given, which can be used to simulate the actual working conditions of a variety of hydraulic components and also used for the loading test. According to application, it shows that the performance testing system can work as an effective approach for quality checking for the new produced hydraulic components before they were put into the market.

A Hydraulic Control System Design for Change-Wheel Garage of Light Rail Based on PLC

This paper introduces the hydraulic control system design for the change-wheel garage of Chongqing light rails through analysis of three-stage cylinder synchronization circuit for lifting bodies, and optimizing the design of the slewing mechanism with respect to the hydraulic servo control system of digital cylinder. The results improved the smoothness in the process of changing wheel lifting and the rotary accuracy of the rotary mechanism. Design on the PLC control system of the system is also included as part of this paper.

Design and Characteristic Analysis of Variable Speed Hydraulic System

The motor variable frequency speed control technology applied to the traditional hydraulic system based on variable speed hydraulic transmission principle with The PLC technology, hydraulic control, detection technology and configuration of organic, it combine PLC as the core of the lower machine control components, PC as the control, researched the variable speed hydraulic test system hardware, software and control systems design. The experiments were performed, realized the variable speed hydraulic experimental platform for open loop control and variable speed hydraulic system parameters real-time monitoring and dynamic display. It overcomes some of the shortcomings of the conventional hydraulic system, improved the efficiency, the hydraulic system run more smoothly and reduce noise. The experiments show that the variable speed hydraulic test bench run well and achieve the purpose.

Modeling and Simulation of the Hydraulic Height Adjustment System of Mobile Tail Based on AMESim

Mobile tail is an important part of the telescopic belt conveyor. It relies mainly on the hydraulic system to achieve its various functions, while the hydraulic height adjustment system is the basis of its different functions. So the operational principle of hydraulic height adjustment system of mobile tail was analyzed in this paper. Parameters which may affect the dynamic process were analyzed. Software AMESim was used to model and simulate the dynamic process. The velocity and displacement of piston and the pressure of the hydraulic cylinder were calculated by the software. Different pump flow and different heart diameter of one-way valve were used to analyze their influence on dynamic process, which provide a reference to the optimal design of hydraulic system of mobile tail.

Lubricant Chemistry and Rheology Effects on Hydraulic Motor Starting Efficiency

The starting efficiency of hydraulic motors is critically important because it is often a limiting criterion in hydraulic system design. One means of improving starting efficiency is to optimize the chemistry of the lubricating fluid. To understand the potential effect of new hydraulic fluid formulations, it is necessary to characterize their physical properties and performance from multiple perspectives. In this work we report a comprehensive characterization of five lubricating fluids with the same viscosity but different additive and base stock compositions. Analysis includes measurement of frictional behavior, thermophysical and rheological properties, and mechanical efficiency in three different hydraulic motors. Trends were analyzed and correlations between the various fluid properties were identified. The results illustrate the importance of operation-specific fluid formulation and comprehensive lubricant characterization.

Bubble Elimination from Working Oil for Environmentally Friendly Hydraulic System Design

With a view to environmental compatibility, energy saving, cost reduction, and high performance and efficiency, one trend in hydraulic systems, particularly in mobile markets, is to design them to be more compact, require less hydraulic fluid in the reservoir, and use their working hydraulic fluid longer. Air bubbles entrained in working hydraulic fluids have greatly detrimental effects on the function and lifetime of hydraulic fluids, components, and systems. A bubble eliminator using a swirl flow that can eliminate air bubbles from working hydraulic fluid has been proposed and developed by our smart and clean hydraulic project. This paper focuses on technical issues related to air bubbles, the aging process of hydraulic oil, and a field test of the performance of the bubble eliminator.

Study on Megawatt-Class Wind Turbine Hydraulic System and its Materials

Compared with electric pitch, hydraulic pitch has the merits— fast response, stable pitch, safe , reliable, etc., and is generally used in the megawatt-class wind turbine. The problems faced by the localization process of the hydraulic system, considering most of our wind farms of the unique climatic conditions and use characteristics, the localization of technical parameters of the hydraulic system and component materials selection requirements and design methods are put forward. Wind turbine pitch hydraulic system with independent intellectual property rights is developed, and is passed the actual use of assessment of the wind farm

The Location Governor Hydraulic System's Design and Application of 300MW Class Pumped Storage Unit

This paper represents particularity and importance of pumped-storage power station unit. It introduces localization governor hydraulic system’s composition, difficulty point and key point of 300MW class pumped-storage unit. It also puts forward pump direction and turbine direction dual rate closing program to active and introduces application status on side.

Design of Hydraulic System of Sway Machine Based on Electro-Hydraulic Proportional Control Technology

According to the problems of hydraulic system of sway machine, such as commissioning and maintenance are inconvenient, impact of change direction is big, system speed is slow, production efficiency is low, etc. It used electro-hydraulic proportional control valve to improve design in hydraulic system of sway machine. Application of electro-hydraulic proportional control valve has realized automatic adjustment of the hydraulic motor speed; it is effective to solve variable speed movement of sway machine frame and no impact of changing direction smooth. Commissioning and maintenance of sway machine are more convenient, and it improves performance of sway machine.

Compare the Dynamic Characteristics of Inlet and Outlet Throttle Speed-Regulating Hydraulic System

A comprehensive mathematical model of the hydraulic inlet and outlet throttle speed-regulating system was established that included most components’ dynamic characteristics such as the hydraulic cylinder, the throttle valve, the hydraulic pump, the relief valve. The simulink of matlab was used to emulate the equations. The system parameters for example throttle opening area, oil bulk modulus were analyzed how to influence the dynamic characteristics of throttle speed control system. How to correctly select circuit under working condition and how to improve equipment performance in the hydraulic system design are indicated through comparing the dynamic characteristics of inlet and outlet speed-regulating circuit.

The Study of Dynamic Characteristic of Full Hydraulic Power Steering System Based on AMESim

The simulation model of full hydraulic power steering system whose key part is full hydraulic power steering unit is established based on AMESim. According to the parameters from one articulated construction vehicle, the dynamic characteristic of the full hydraulic power steering system can be studied. Through the input from steering wheel and external load in different situations, the response curve is obtained, that can provide references for the design of full hydraulic power steering system in articulated construction vehicles.

The Optimization Design of the Mill Hydraulic Loading System

Through the deep analysis of its working principal and the structure, the hydraulic loading system was designed, and the optimum method of the mill hydraulic loading system was researched. After the optimization it is not only that the proper coal granularity was ensured and the remote control capability got enhanced, but also resolved the problem of high pressure of the hydraulic system, and reduced the energy and consumption.

Design and Analysis of a Two-Valve Control Hydraulic System for Controllable Pitch Propeller

This paper designs a two-valve control hydraulic system for controllable pitch propeller which consists of an electro-hydraulic directional control valve and a proportional directional control valve. The parallel control strategy is proposed and respective controllers are determined for the system. It yields out the relationship between the control parameters and valves characteristics by modeling and simulation analysis. Also the influence of the proportional valve flow rate on pitch control accuracy is discussed.

Design of Hydraulic System of Subsea X-Tree

Onshore hydraulic systems are not generally applied in subsea production control system,so how to design a special needed hydraulic system for subsea X-tree has been one of the hot research questions.Several specific hydraulic components were analyzed, such as hydraulic power unite,umbilical,subsea control model,hydraulic control valve and valve actuator, and then corresponding hydraulic schematic which can meet the requirements of subsea X-tree is presented.