Research on balanced self-weight of horizontal link heavy duty servo cylinder

2020 ◽  
pp. 095440622093999
Author(s):  
Linan Ma ◽  
Xiaodong Zhao ◽  
Xiaoxing Yang ◽  
Wenze Zhang ◽  
Tao Wang
Keyword(s):  
Simulation Method ◽  
Hydraulic Cylinder ◽  
Heavy Duty ◽  
Working Process ◽  
Support Structure ◽  
Maximum Displacement ◽  
Sealing Performance ◽  
Output Force ◽  
Angle Interval ◽  
Working Efficiency

In this article, the horizontal hinged heavy duty servo cylinder is taken as the research object. In the actual working process, while the servo hydraulic cylinder outputs the curve force, the cylinder body will also rotate with the hinge point to a certain extent. Because the position of the center of gravity is constantly changing, and the weight of the cylinder body is too large, the friction causes damage to the sealing structure and seriously affects the working efficiency of the equipment. In order to improve the sealing performance of the servo hydraulic cylinder, a corresponding study is carried out. Firstly, the working angle interval of servo cylinder is optimized to ensure that the friction is the least in this range. Based on this, a new supporting structure is proposed, in which a small hydraulic cylinder is installed at the bottom of the servo hydraulic cylinder body. By controlling the output force of the small hydraulic cylinder, the cylinder body and piston rod are aligned all the time. The servo cylinder body is flexibly processed to more realistically see the adverse effect of the friction, and the co-simulation method using MSC.ADAMS and MATLAB/Simulink verifies the new support structure to improve the sealing performance. According to the simulation results and experiment results, and combined with the deformation curve of the hydraulic cylinder, when the maximum displacement is 336 mm, the maximum rotation angle is 15.6°, the friction is the smallest, about 5801.9 N. It is known from the experiment results that after adding the new support structure, the frictional force is reduced to 1365.9 N, which reduces the friction of nearly 76.5%.

The Construction and Simulation Analysis of Three-Qubit Hxx Chain Refrigerator Based on Quantum Entangled States

2013 ◽  
Vol 380-384 ◽  
pp. 4849-4855
Author(s):  
Xing Kui Huang
Keyword(s):  
Field Strength ◽  
Simulation Analysis ◽  
Heat Engine ◽  
State Theory ◽  
Entangled States ◽  
Entangled State ◽  
Working Process ◽  
Mapping Analysis ◽  
Quantum Entangled States ◽  
Working Efficiency

Quantum entangled state theory is combined with quantum thermodynamics theory to build quantum entangled state heat engine. The basic nature of three-qubit Hxx chain, and all parameters of the orbit are analyzed. Energy model of quantum entangled state refrigerator in working process is taken as as a theoretical basis to construct three qubits Hxx chain refrigerator based on quantum entangled states. The working nature of the new quantum entangled state refrigerator under different field strength is studied. Compaired with two-qubit Hxxx chain refrigerator based on quantum entangled states and mapping analysis, the working efficiency of three qubits Hxx chain refrigerator based on quantum entangled states is much higher when the field strength is not zero and its working state is more stable.

Modelling, validation and parameter sensitivity of regenerative hydraulic-electric shock absorber

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Min Zhang ◽  
Cheng Hu ◽  
Jingwei Gao ◽  
Peng Zheng
Keyword(s):  
Electric Shock ◽  
Dynamic Modelling ◽  
Hydraulic Cylinder ◽  
Heavy Duty ◽  
Power Performance ◽  
Hydraulic Motor ◽  
Content Type ◽  
Railway Vehicles ◽  
Shock Absorbers ◽  
Component Design

PurposeSuspension is a significantly important component for automotive and railway vehicles. Regenerative hydraulic-electric shock absorbers (RHSA) have been proposed for the purpose of attenuating vibration of vehicle suspension, and also recover kinetic energy originated from vehicle vibration that is conventionally dissipated by hydraulic dampers. To advance the technology, the paper aims to present an RHSA system for heavy-duty and railway vehicles and create a dynamic modelling to discuss on the development process of RHSA model.Design/methodology/approachFirst, the development of RHSA dynamic model can be resolved into three stage models (an ideal one, a second one with an added accumulator and a third one that considers both accumulator and system losses) to comprehensively evaluate the RHSA's characterisation. Second, a prototype is fabricated for testing and the results meet desired agreements between simulation and measurement. Finally, the study of key parameters is carried out to investigate the influences of hydraulic-cylinder size, hydraulic-motor displacement and accumulator pre-charged pressure on the RHSA system.FindingsThe findings of sensitivity analysis indicate that the component design can satisfy the damping characteristics and power performance required for heavy-duty vehicle, freight wagon and typical passenger train. The results also show that reducing the losses is highly beneficial for saving suspension energy, improving system reliability and increasing power-conversion efficiency.Originality/valueThe paper presents a more detailed method for the development and analysis of a RHSA. Compared with the typical shock absorbers, RHSA can also recover the vibration energy dissipated by suspension.

Numerical Assessment on Edgewise Compressive Strength of Heavy Sandwich Fiberboard

2015 ◽  
Vol 724 ◽  
pp. 74-78
Author(s):  
Guang Jun Hua ◽  
Wei Min Fei ◽  
Ze Shun Liao ◽  
Yong Xie
Keyword(s):  
Compressive Strength ◽  
Sample Size ◽  
Simulation Method ◽  
Large Sample Size ◽  
Heavy Duty ◽  
Material Consumption ◽  
Shape Processing ◽  
Reasonable Choice ◽  
Correct Understanding ◽  
Corrugated Fiberboard

The application status of heavy duty corrugated paperboard and honeycomb fiberboard were reviewed. In order to contrast the edgewise compressive strength of the two typical sandwich fiberboards, the finite element models of honeycomb fiberboard and AAB flute corrugated fiberboard with large sample size were established. By numerical simulation method, the effect of structure on the edgewise compressive strength were decoupled from the factor such as the materials, material consumption, sample size and shape, processing technology and environmental conditions etc. Under the same material, material consumption and sample size, bulking analysis based on numerical method was carried out. The results show that the edgewise compressive strength of both sides of the honeycomb fiberboard is about 50% higher than that of AAB flute corrugated fiberboard, and honeycomb fiberboard is similar to bi-isotropic material. The conclusions obtained are valuable to reasonable choice of the honeycomb fiberboard and heavy duty corrugated fiberboard and correct understanding the mechanical properties of the two sandwich fiberboard.

The Analysis of Motion and Strength for the Clamping Mechanism of Die-Casting Machine Weighing 4500 Ton

2012 ◽  
Vol 462 ◽  
pp. 135-140
Author(s):  
Hai Kuan Ma ◽  
Sheng Dun Zhao ◽  
Qi Zhang ◽  
Jia Xie
Keyword(s):  
Stress Condition ◽  
System Simulation ◽  
Die Casting ◽  
Casting Machine ◽  
Hydraulic Cylinder ◽  
Mechanism Model ◽  
Motion Condition ◽  
Output Force ◽  
The Relationship ◽  
Analysis Of Motion

The clamping mechanism motion condition of die-casting machine is very important to the whole die-casting machine. In order to analyze the relationship between the output force of clamping mechanism and displacement of hydraulic cylinder, the whole clamping mechanism model is established. By the software ADAMS (Automatic Dynamic Analysis of Mechanical System) simulation, the all kinds of characteristics are got. Through the comparison, the best displacement by the output force is derived. In the end, on the basis of the result of the analysis, the stress condition of clamping mechanism confirms the rationality.

The Mechanical Characteristics Study on an Interconnected Anti-Rolling Suspension System

2013 ◽  
Vol 791-793 ◽  
pp. 676-680
Author(s):  
You Shan Hou ◽  
Hui Xin Song ◽  
Chao Wang
Keyword(s):  
Mechanical Characteristics ◽  
Digital Simulation ◽  
Rolling Resistance ◽  
Simulation Method ◽  
Suspension System ◽  
Heavy Duty ◽  
Nonlinear Mathematical Models ◽  
Critical Technology ◽  
Study Results ◽  
Heavy Duty Vehicles

The heavy-duty special vehicles easily roll during steering, anti-rolling technology becomes a critical technology to the heavy-duty vehicles. Aiming at the rolling problem of a full load heavy vehicle in the process of steering, an interconnected anti-rolling suspension system with adjustable damping was designed, the nonlinear mathematical models of both hydro-pneumatic independent suspension and interconnected anti-rolling suspension system were established. The mechanical characteristics of two kind of suspension were studied through digital simulation method, discussing the system parameter changes affection on the performance of interconnected anti-rolling suspension system. The study results indicate that the interconnected anti-rolling suspension system bitterly improves vehicles rolling resistance in contrast to the oil-gas mixed independent suspension, the study results provide theoretical basis for the anti-rolling s design of heavy-duty vehicles.

Flexure Hinge Guided Motion Gripper with Force Sensor

2011 ◽  
Vol 121-126 ◽  
pp. 3299-3303
Author(s):  
Li Ma ◽  
Ci Xiong Xu ◽  
Sha Sha Zhou ◽  
Wei Bin Rong ◽  
Li Ning Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Force Sensor ◽  
Flexure Hinge ◽  
Working Process ◽  
Temperature Drift ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Output Displacement ◽  
Strain Type

A piezoelectric gripper with force sensor is presented for an optical precision manipulation. The gripper utilizes flexure hinge mechanisms with two-step amplification to achieve output displacement. Micro displacement amplification principle of the gripper is analyzed and verified using finite element analysis (FEA) soft. A force sensor of resistance strain type with elastic plate structure of bi-cantilever is designed, which is fixed at the bottom of the gripper to detect force signals during the working process. The strain foils adopt a connecting method of full-bridge. According to theoretical analysis and FEA of the force sensor, bonding positions of the strain foils are determined. Experimental results indicate that the sensor has good linearity and little temperature drift and creep, and its resolution is less than 100mN. Micro-vision method is used to test the gripper, and maximum displacement is 302μm.

Research on General Scheme for Curtain Wall Cleaning Robot

2013 ◽  
Vol 765-767 ◽  
pp. 2037-2040
Author(s):  
De Dong Tang ◽  
Guo Qing Zeng ◽  
Xue Zhang
Keyword(s):  
Control System ◽  
Process Analysis ◽  
General Scheme ◽  
Heavy Duty ◽  
Working Process ◽  
Curtain Wall ◽  
Cleaning Robot ◽  
Plc Control ◽  
Cleaning System ◽  
And Control

The purpose of this research is to develop the cleaning robot for cleaning the glass curtain wall. The main mechanical structure, adsorption system, cleaning system and control system has been researched. With the adsorption and separation of four sucker group by turns, robot can move on the vertical curtain successfully. Four suckers of the each sucker group are arranged in circumference, so the robot can be adsorbed reliability. According to the working process analysis of the robot, PLC control system is designed. Robot general scheme designed in this paper can achieve heavy-duty work, neat movement, reliable attaching and other requests.

Design of the Hydraulic System for Carrying Manipulator with 6-DOF

2014 ◽  
Vol 989-994 ◽  
pp. 2802-2806
Author(s):  
Min Wang ◽  
Cai Dong Wang ◽  
Hui Zheng ◽  
Guo Feng Fan
Keyword(s):  
Mathematical Model ◽  
Hydraulic System ◽  
Degrees Of Freedom ◽  
Assembly Line ◽  
Industrial Robot ◽  
Structural Parameters ◽  
Hydraulic Cylinder ◽  
Six Degrees Of Freedom ◽  
Output Force ◽  
Working Principle

According to the requirements for wheel hub assembly line, the structure and hydraulic system of carrying manipulator with six degrees of freedom (DOF) is designed. The working principle of the hydraulic system is analyzed. To minimize the output force of the hydraulic cylinder, a mathematical model of hydraulic cylinder output force and structural parameters is established. And then the manipulator structure is optimized based on Matlab software. The key components of the hydraulic system are selected. This research provides reference for design of similar hydraulic system of industrial robot.

scholarly journals Development of a digital model of the working process of a hydraulic excavator

2020 ◽  
Vol 177 ◽  
pp. 03012
Author(s):  
Rustem Nabiullin ◽  
Anatoliy Komissarov ◽  
Viktor Shestakov
Keyword(s):  
Computational Experiment ◽  
Hydraulic Cylinder ◽  
Operating Parameters ◽  
Hydraulic Excavator ◽  
Operational Parameters ◽  
Working Process ◽  
Hydraulic Excavators ◽  
Hydraulic Mechanism ◽  
The Relationship ◽  
Bucket Handle

In this work, we consider a method for determining the rational values of the structural and operational parameters of the lever - hydraulic mechanisms of hydraulic excavators based on an analysis of the results of a computational experiment obtained at the output of a mathematical model of a workflow. It is shown that the presence of kinematic connections between the engine (hydraulic cylinder) and the links of the lever-hydraulic mechanism causes a change in the relationship between the operating parameters of the engine and the power parameters implemented on the driven members (bucket, handle and arrow), depending on the geometric parameters (lengths) of links and coordinates of points (axes) connections links. A simulation model of the working process is developed, which allows to determine the operational parameters of the lever - hydraulic mechanisms.

An Analysis of the Working Process of a Diesel Engine under Cylinder Deactivation

2019 ◽  
pp. 9-18
Author(s):  
Ying Liu ◽  
A.G. Kuznetsov
Keyword(s):  
Diesel Engine ◽  
Control Method ◽  
Engine Performance ◽  
Simulation Method ◽  
Accurate Estimation ◽  
Engine Fuel ◽  
Working Process ◽  
Cylinder Deactivation ◽  
Partial Load ◽  
Working Processes

The effect of cylinder deactivation as a method of controlling a diesel engine working in partial load modes is usually justified based on the characteristics corresponding to the engine performance without cylinder deactivation. However, the results obtained through theoretical analysis and in practice have significant differences, since the working processes of activated and deactivated cylinders run in different ways. In this paper, a simulation method is used to analyze the working process of the diesel engine under cylinder deactivation. The working processes in activated and deactivated cylinders are calculated using a computer model, and energy losses determining engine fuel efficiency are estimated. It is shown that the valve system in deactivated cylinders has a significant effect on the specific fuel consumption. The engine performance in partial load modes at different rotational speeds and torques and with a varying number of deactivated cylinders is investigated. The results obtained demonstrate the characteristics of the engine working process under cylinder deactivation and enable a more accurate estimation of the effect of this engine control method.

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