Forklift Hydraulic System Design

2013 ◽  
Vol 303-306 ◽  
pp. 2748-2753 ◽  
Author(s):  
Chun Yu ◽  
You Min Wang ◽  
Chun Zhao
Keyword(s):  
Hydraulic System ◽  
Production Cost ◽  
Operating Parameter ◽  
Hydraulic Cylinder ◽  
Operational Parameter ◽  
Improve Design ◽  
System Pressure ◽  
Oil Tank ◽  
Hydraulic System Design ◽  
Hydraulic Valve

In order to improve design performance, shorten development cycles, reduce production cost, designed the forklift hydraulic system. By the analysis of the forklift tilting and lifting process, the forklift hydraulic system schematic is made. Based on the schematic, designed and calculated the size and operating parameter of hydraulic cylinder, the pump operating parameter, hydraulic valve operational parameter, hydraulic oil tank effective volume, pipe size, selected the appropriate hydraulic components, and checked the system pressure loss and temperature rise. The results show that the hydraulic system meets the requirements.

The Air Controlled Hydraulic System Design of 3201z-Type Dump Truck Lifting Mechanisms

2011 ◽  
Vol 383-390 ◽  
pp. 1202-1207
Author(s):  
Tao Ping Yan
Keyword(s):  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Dump Truck ◽  
Gear Pump ◽  
Technical Parameters ◽  
Technical Performance ◽  
System Pressure ◽  
Working Principle ◽  
The Stability ◽  
Hydraulic System Design

3201Z-type dump truck is modification desiged by EQ3208GJ dump truck chassis which the technical performance parameters are known, and using a lifting mechanism of air controlled hydraulic system. By analyzing the composition and working principle of air controlled hydraulic system and referring to similar models, the design of the tank, the limiting mechanism and power taker are conducted. By calculating the main technical parameters, including in the performances of the hydraulic cylinder and the hydraulic pump, the dump truck's special oil cylinder HG-E180X780 and gear pump CBT-E563 are selected. By the stability of the piston rod, the system pressure and cars lifting time are checked; the reasonability and safty of the design can be proved.

The Air Controlled Hydraulic System Design of 3201z-Type Dump Truck Lifting Mechanisms

2012 ◽  
Vol 433-440 ◽  
pp. 3852-3857
Author(s):  
Tao Ping Yan
Keyword(s):  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Dump Truck ◽  
Gear Pump ◽  
Technical Parameters ◽  
Technical Performance ◽  
System Pressure ◽  
Working Principle ◽  
The Stability ◽  
Hydraulic System Design

3201Z-type dump truck is modification desiged by EQ3208GJ dump truck chassis which the technical performance parameters are known, and using a lifting mechanism of air controlled hydraulic system. By analyzing the composition and working principle of air controlled hydraulic system and referring to similar models, the design of the tank, the limiting mechanism and power taker are conducted. By calculating the main technical parameters, including in the performances of the hydraulic cylinder and the hydraulic pump, the dump truck's special oil cylinder HG-E180X780 and gear pump CBT-E563 are selected. By the stability of the piston rod, the system pressure and cars lifting time are checked, the reasonability and safty of the design can be proved.

Forklift Hydraulic System Simulation Based on ADAMS

2012 ◽  
Vol 424-425 ◽  
pp. 598-602 ◽  
Author(s):  
You Min Wang ◽  
Chun Zhao ◽  
Jian Hua Zhang
Keyword(s):  
Hydraulic System ◽  
Production Cost ◽  
Control Function ◽  
Three Dimensional ◽  
Improve Design ◽  
Kinematics Simulation ◽  
Simulation Based ◽  
Motion Speed ◽  
Work Size ◽  
Control Functional

In order to improve design performance, shorten development cycles, reduce production cost, we design and research the forklift hydraulic system, developed forklift hydraulic system diagram. Forklift virtual prototype’s 3-D solid modeling is designed by Pro / E three-dimensional software, and imported into the ADAMS environment. Add constraints and drivers exert the control function separately to the tilting cylinder and lifting cylinder, carry on the kinematics simulation. Through the analysis to the compound motion actuation control functional arrangement、the compound motion speed graph、the gate’s tilt angle graph、the tilting cylinder stress graph and the lifting cylinder stress graph, he simulation result indicated: each cylinder design is reasonable, the movement without interference，the reasonable work scope satisfied to the work size request

Based on Fluid Digital Transmission and Control Theory on Application of Digital Hydraulic Valve

2012 ◽  
Vol 619 ◽  
pp. 455-458
Author(s):  
Wen Hua Li ◽  
Yu Ling Du
Keyword(s):  
Control Theory ◽  
Hydraulic System ◽  
High Speed ◽  
High Efficiency ◽  
Simulation Analysis ◽  
High Reliability ◽  
Electronic Control Unit ◽  
System Pressure ◽  
Analysis Experiment ◽  
Hydraulic Valve

A digital hydraulic valve is a new control theory and method, it is through the electronic control unit installed in a conventional valve, and integrated processing, the formation of a wide variety of digital valve，By the digital-to-analog conversion element is directly connected with the computer. Using the computer output pulse number and frequency to control electro hydraulic system pressure and measurement. The system proposed can make the hydraulic system has the advantages of high efficiency, high speed, high reliability. And used Matlab/Simulink software to control system performance simulation analysis, experiment and simulation results show that, this system has great application prospect and practical value.

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

2012 ◽  
Vol 462 ◽  
pp. 833-838
Author(s):  
Hong Yan Yang ◽  
Ge Jin Hu
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Working Condition ◽  
Hydraulic Cylinder ◽  
Hydraulic Pump ◽  
Relief Valve ◽  
System Parameters ◽  
Hydraulic System Design ◽  
Equipment Performance

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.

Extreme Research on the Order Motion of the Hoisting Two-Stage Hydraulic Cylinder

2015 ◽  
Vol 727-728 ◽  
pp. 430-434
Author(s):  
Cheng Liang Li ◽  
Ming Su ◽  
Zhi Ping Xie
Keyword(s):  
System Design ◽  
Numerical Method ◽  
Hydraulic System ◽  
Maximum Load ◽  
Hydraulic Cylinder ◽  
Design Stage ◽  
Two Stage ◽  
Python Language ◽  
Simulation Results ◽  
Hydraulic System Design

The motion order of thehoisting two-stage hydraulic cylinder will be affected by load. The paperresearches the script development of the AMESim based on python language, putsforward the numerical method of solving the maximum load of the hoistingtwo-stage hydraulic cylinder in the hydraulic system: set the preliminaryvalue, compare the simulation results whether the displacements of thetwo-stage hydraulic cylinder are equal, adopt "the dichotomy" theoryto iterate and in the end seek out the maximum load quickly. And paves a newvenue for predicting the maximum load two-stage hydraulic cylinder canwithstand in the hydraulic system design stage.

Soft Switching Approach to Reducing Transition Losses in an On/Off Hydraulic Valve

2009 ◽  
Author(s):  
Michael B. Rannow ◽  
Perry Y. Li
Keyword(s):  
Hydraulic System ◽  
Check Valve ◽  
Fluid Flows ◽  
Soft Switching ◽  
Total System ◽  
System Efficiency ◽  
Hydraulic Systems ◽  
Controlled Systems ◽  
Flow Through ◽  
Hydraulic Valve

A method for significantly reducing the losses associated with an on/off controlled hydraulic system is proposed. There has been a growing interest in the use of on/off valves to control hydraulic systems as a means of improving system efficiency. While on/off valves are efficient when they are fully open or fully closed, a significant amount of energy can be lost in throttling as the valve transitions between the two states. A soft switching approach is proposed as a method of eliminating the majority of these transition losses. The operating principle of soft switching is that fluid can temporarily flow through a check valve or into a small chamber while valve orifices are partially closed. The fluid can then flow out of the chamber once the valve has fully transitioned. Thus, fluid flows through the valve only when it is in its most efficient fully open state. A model of the system is derived and simulated, with results indicating that the soft switching approach can reduce transition and compressibility losses by 79%, and total system losses by 66%. Design equations are also derived. The soft switching approach has the potential to improve the efficiency of on/off controlled systems and is particularly important as switching frequencies are increased. The soft switching approach will also facilitate the use of slower on/off valves for effective on/off control; in simulation, a valve with soft switching matched the efficiency an on/off valve that was 5 times faster.

The Research on Rake-Car’s Driving System of Ore Reclaimer

2013 ◽  
Vol 300-301 ◽  
pp. 10-13
Author(s):  
Yuan Hui Li ◽  
Kui Sheng Chen ◽  
Jiang Hong Deng ◽  
Xin Yuan Chen
Keyword(s):  
Computer Simulation ◽  
System Design ◽  
Failure Rate ◽  
Hydraulic System ◽  
Driving Mechanism ◽  
Connecting Rod ◽  
Driving System ◽  
Final Design ◽  
Hydraulic System Design ◽  
Working Situation

Rake-car’s driving system of ore reclaimer originally used crank and connecting rod mechanism as driving mechanism. The driving mechanism got some trouble that parts got severe wear and failure rate of mechanism was high. The hydraulic system is used to drive rake car in view of hydraulic driving system’s advantage. By analysis on existing problem of crank and connecting rod mechanism, the actual working load of equipment is tested and the working situation is analysed. The working situation of the hydraulic system is also analysed by computer simulation. By optimization of the hydraulic system design, the final design is determined. The whole system is actually used. It works well.

scholarly journals Hydraulic System Design of Hydraulic Actuators for Large Butterfly Valves

2014 ◽  
Vol 7 (4) ◽  
pp. 150-155
Author(s):  
Ye HUANG ◽  
◽  
Changsheng LIU ◽  
Shiongur Bamed ◽  
◽  
...  
Keyword(s):  
System Design ◽  
Hydraulic System ◽  
Hydraulic Actuators ◽  
Hydraulic System Design

Hydraulic Model and Simulation Analysis for Monorail Brake System

2013 ◽  
Vol 278-280 ◽  
pp. 350-353 ◽  
Author(s):  
Feng Gao ◽  
Lin Jing Xiao ◽  
Shuai Guo ◽  
Hong Gang Ma
Keyword(s):  
Hydraulic System ◽  
Simulation Analysis ◽  
Hydraulic Cylinder ◽  
Mine Safety ◽  
Brake System ◽  
Flow Area ◽  
Throttle Valve ◽  
Model And Simulation ◽  
Spring Force ◽  
Unloading Time

This paper mainly analyzes the hydraulic system principle during the monorail braking, and come to a conclusion that the spring stiffness and the throttle valve flow area are main factors affect the brake system. Then we use the MSC.EASY5 to modeling the hydraulic system, and simulate the unloading time of hydraulic cylinder under the spring force, the result shows that, the response time of a braking system can meet the requirement of the coal mine safety regulation, and change the flow area of throttle valve will affect the brake system.

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