Simulation of Hydrostatic Drive System of Crawler Bulldozer

2011 ◽  
Vol 243-249 ◽  
pp. 6178-6182 ◽  
Author(s):  
Pu Xing ◽  
Shi Lin Luo ◽  
Cun Bo Liu ◽  
Cong Feng Tian
Keyword(s):  
Steady State ◽  
Stable State ◽  
Feedback Regulation ◽  
Hydraulic Motor ◽  
Operation System ◽  
Efficient Operation ◽  
Proportional Control ◽  
System Pressure ◽  
Driven System ◽  
Working Principle

According to the hydraulic driven system working principle of crawler bulldozer, the simulation model of electro-hydraulic proportional control driven system was established by using AMESim, and the simulation was carried out. The simulation result indicates that using feedback regulation in control of hydraulic motor of driven system, the system pressure stay in a relatively stable state, which is conducive to the efficient operation system. As the load increasing suddenly, the system pressure volatile during the volume of hydraulic motor changing. However, steady state can be quickly restored.

Pressure Control Characteristics Simulation Research of Electro-Hydraulic Proportional Variable Pump

2012 ◽  
Vol 232 ◽  
pp. 521-526
Author(s):  
Hui Wang ◽  
Zhuo Xu ◽  
Fan Long Meng
Keyword(s):  
Steady State ◽  
Structural Parameters ◽  
Pressure Control ◽  
Input Voltage ◽  
Core Diameter ◽  
Simulation Research ◽  
System Pressure ◽  
Simulating Analysis ◽  
System Output ◽  
Working Principle

Based on the theoretical analysis on working principle and motion of the electro-hydraulic proportional variable piston pump, it created and simulated the model in the AMESIM software. The influences of main structural parameters of variable pump on system output dynamic characteristics were revealed after simulating analysis results of pressure control characteristics. And the steady state output of system pressure is proportional to the input voltage of amplifier. The overshoot decreases with the increasing of input voltage, and the response get faster. The damping aperture of proportional reversing valve and core diameter of control plunger have a greater influence on the dynamic response of system.

Design and Characteristic Analysis for Indexing Mechanism of Rotation Worktable

2010 ◽  
Vol 34-35 ◽  
pp. 1573-1577 ◽  
Author(s):  
Guang Zhen Cheng ◽  
Yuan Bo Cheng
Keyword(s):  
Hydraulic Cylinder ◽  
Transmission Mechanism ◽  
Hydraulic Motor ◽  
Machine Process ◽  
Characteristic Analysis ◽  
Working Principle ◽  
Indexing Mechanism ◽  
Working Method

Aim is designing the indexing rotation worktable, used for machine process indexing rotation. in this paper introduced two kind of working method of rotation worktable, indexing rotation and circle feeding. Particularly discuss structure compose, drive fashion, transmission mechanism ,orientation clamp mechanism, working principle, indexing rotation action course, about swing hydraulic motor indexing mechanism, rack piston hydraulic cylinder indexing mechanism and hydraulic cylinder Geneva wheel indexing mechanism. through analysis and compare, summarize advantage and disadvantage of the three mechanisms, supply reference for designing and selecting indexing mechanism. the new is used hydraulic cylinder Geneva wheel mechanism to indexing rotation worktable.

scholarly journals High Step-up Coupled Inductor Inverters Based on qSBIs

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3032 ◽  
Author(s):  
Hongchen Liu ◽  
Xi Su ◽  
Junxiong Wang
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Low Voltage ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Passive Components ◽  
Steady State Analysis ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Working Principle

In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

An Ontology-Driven System for E-Learning and Knowledge Management

2010 ◽  
pp. 302-324 ◽  
Author(s):  
Gilbert Paquette
Keyword(s):  
Knowledge Management ◽  
Research Network ◽  
Software Systems ◽  
Operation System ◽  
Ontological Engineering ◽  
Modeling Tool ◽  
Graphic Model ◽  
Driven System ◽  
E Learning ◽  
Run Time

Between 2003 and 2008, within the LORNET research network (www.lornet.org), our team has been designing and developing TELOS, an innovative operation system for eLearning and knowledge management environments that is driven by a technical ontology. After presenting the underlying principles of this system, we will develop a graphic model of the resulting ontology that captures the conceptual architecture of the system. Next, we will present the main aggregation modeling tool and the way it is related to the TELOS Ontology. Finally, we will illustrate how the ontology is used to drive the system at run-time. The conclusion will discuss the contri- bution of this research to the field of ontological engineering of software systems.

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.

Huge Forging Equipment Hydraulic System Dynamic Analysis

2012 ◽  
Vol 619 ◽  
pp. 459-462 ◽  
Author(s):  
Miao Xie ◽  
Jun Meng ◽  
Wen Xin Xu ◽  
Rong Bao Dong ◽  
Jian Liang Wang
Keyword(s):  
Hydraulic System ◽  
Simulation Models ◽  
Simulation Software ◽  
Hydraulic Systems ◽  
System Pressure ◽  
Hydraulic Hammer ◽  
Hammer Head ◽  
Working Principle ◽  
Switching Characteristics ◽  
Hammer Forging

In order to optimize the dynamic characteristic of hydraulic system of large forging equipment. It based on the model of one company of a certain aero-engine hydraulic system of hydraulic hammer forging, analysis the composition and working principle of hydraulic systems. Using simulation software AMESim, simulate the model of hydraulic systems and by changing the system pressure, flow and effect of the hammer-head stroke to explore this kind of switching characteristics of forging equipment’s hydraulic system. The result shows that this kind of simulation models can reflect the working status of hydraulic hammer well, and provide a technical reference for analysis and tuning equipment that with similar to forging equipment.

Thermal Hydraulics of Accelerator-Driven System Using RELAP5 Code

2015 ◽  
Vol 1 (4) ◽  
Author(s):  
Indu Kumari ◽  
Ashok Khanna
Keyword(s):  
Steady State ◽  
Constant Heat ◽  
Power Extraction ◽  
Driven System ◽  
Design Values ◽  
Accelerator Driven System ◽  
Simulation Results ◽  
Steady State Simulation ◽  
Heat Loads ◽  
Relap5 Code

A lead–bismuth eutectic (LBE)-cooled accelerator-driven system (ADS) of 30 MeV and 0.5 mA proton beam has been simulated. The performance of this 15-kW ADS has been analyzed for three coolants (LBE, air, and water), all under variable and constant heat loads using the thermal hydraulic code RELAP5/Mod4.0. Steady-state simulation results for temperature of coolants match the reported design values within 3.2% of relative error. The effect of variation of mass flow rate on power extraction has also been evaluated for the three coolants, namely, LBE, air, and water.

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

2012 ◽  
Vol 510 ◽  
pp. 34-38
Author(s):  
Yun Li ◽  
Jin Wei Fan ◽  
Xing Li Gao ◽  
Xiao Feng Wang
Keyword(s):  
Hydraulic System ◽  
Production Efficiency ◽  
Control Valve ◽  
Control Technology ◽  
Variable Speed ◽  
Motor Speed ◽  
Hydraulic Motor ◽  
Proportional Control ◽  
Improve Design ◽  
Automatic Adjustment

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.

Sign in / Sign up

Export Citation Format

Share Document