Wheeled Off-Road Excavator with 2-Dof Articulated Body

2012 ◽  
Vol 220-223 ◽  
pp. 836-840
Author(s):  
Tong Jian Wang ◽  
Bo Bo Xi ◽  
Wei Chen ◽  
Chuan Xiang Lv
Keyword(s):  
Hydraulic Drive ◽  
Drive System ◽  
Adams Simulation ◽  
Key Technologies ◽  
Working Principle ◽  
Passing Ability

Proposed wheeled off-road excavator with 2-Dof articulated body, and analyzed the working principle of the 2-Dof articulated body, machine-hydraulic drive system and the key technologies .Through the study of the vehicle drive system matching calculation and the ADAMS simulation of articulated body, the results show that the articulated truck has good passing ability, stability and adaptability on a complex road.

Shotcrete Robot Simulation Tecnology Used to Solve the Problem Pitching Mechanism Underrun

2010 ◽  
Vol 40-41 ◽  
pp. 825-829
Author(s):  
Zhi An Song
Keyword(s):  
Simulation Analysis ◽  
Hydraulic Drive ◽  
Maximum Load ◽  
Drive System ◽  
Robot Simulation ◽  
Adams Simulation ◽  
Lower Voltage

As for the problem that pitching mechanism can not pitch up easily at the beginning since the shotcrete robot often work in the lower voltage situation, this paper theoretically analyzes the causes that voltage shortage brings on pitching mechanism pitching up underload and verifies the maximum load working position with ADAMS simulation analysis. In the design of shotcrete robot the pitch cylinder hydraulic drive system is improved and it proves good in its practice.

Modeling and Analysis on Servo Adjustment of Bidirectional Variable Displacement Pump in Hydraulic Drive System of the Cutter Head in a Shield Tunneling Machine

2010 ◽  
Vol 44-47 ◽  
pp. 1380-1386
Author(s):  
Bi Zhong Xia ◽  
Ping Fa Feng ◽  
Hua Yong Yang
Keyword(s):  
Transfer Functions ◽  
Hydraulic Drive ◽  
Drive System ◽  
Shield Tunneling ◽  
Modeling And Analysis ◽  
Initial Control ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Working Principle ◽  
Cutter Head

Based on introduction of the basic configuration, working features of hydraulic drive system of the cutter head in a shield machine, the internal structure of the bidirectional variable displacement pump, BVDP, as the kernel element in the above hydraulic system, is depicted and compared with the ordinary variable plunger pump. Then the working principle and process of hydraulic pilot operated servo displacement adjustment about the BVDP are discussed in detail, and then the mathematical models and its transfer functions of the positive and negative displacement adjustments are established respectively. Also, the relationships between the primary performance indices such as stability condition, positioning stiffness, steady-state error, as well as initial control pressure and system parameters are analysis and concluded.

Traction Force and Climbing Capacity Theoretical Analysis of Hydraulic In-Wheel Motor Drive System

2013 ◽  
Vol 765-767 ◽  
pp. 171-175 ◽  
Author(s):  
Xiao Hua Zeng ◽  
Hui He ◽  
Zhen Ping Zhou ◽  
Sheng Li ◽  
Xiang Hua Li ◽  
...  
Keyword(s):  
Traction Force ◽  
Drive System ◽  
Motor Drive ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Working Principle ◽  
Heavy Truck ◽  
Simulation Results ◽  
Passing Ability ◽  
Motor Drive System

The objective of this paper is to introduce a newly developed Hydraulic In-wheel Motor Drive System (HIMDS) mainly made up of a variable displacement pump and two motors. The new HIMDS is primarily applied to heavy truck to improve its passing ability when encountering the low-roads. This paper Not only illustrates the structure and working principle of the system, but also gives a detailed description of calculation of the improvement in traction force and climbing capacity of the vehicle after working with HIMDS. The Simulation results show that after using the system, the vehicle traction force was increased by 23%, and the climbing capacity was improved by 30% mostly.

Hydraulic System Design for Hexagon Workpiece Flipping Equipment

2011 ◽  
Vol 228-229 ◽  
pp. 719-722
Author(s):  
Hong Wang
Keyword(s):  
Hydraulic System ◽  
Hydraulic Drive ◽  
Essential Element ◽  
Linear Motion ◽  
Work Station ◽  
Practical Applications ◽  
Engineering Controls ◽  
Key Technologies ◽  
Working Principle ◽  
Hydraulic System Design

Workpiece flipping equipment is widely used in hexagon workpiece multi face and work station processing. Hydraulic drive has advantages of easy linear motion achivement, high power quality ratio and rapid dynamic response, etc. It is an essential element of modern mechanical engineering and one of the key technologies of engineering controls. Hydraulic drive system of the hexagon workpiece flipping equipment was designed, the hydraulic system schematic was drawn, its working principle was analysed. The workpiece flipping was successfully achieved by using hydraulic technology, it obtained good results in practical applications.

Stabilization of the Speed of the Hydraulic Motor Through Throttle Compensation for Volume Losses

2020 ◽  
Vol 26 (3) ◽  
pp. 126-130
Author(s):  
Krasimir Kalev
Keyword(s):  
Flow Rate ◽  
Hydraulic Drive ◽  
Pressure Change ◽  
Operating Conditions ◽  
Drive System ◽  
Inlet Pressure ◽  
Schematic Diagram ◽  
Hydraulic Characteristics ◽  
Hydraulic Motor ◽  
Flow Through

AbstractA schematic diagram of a hydraulic drive system is provided to stabilize the speed of the working body by compensating for volumetric losses in the hydraulic motor. The diagram shows the inclusion of an originally developed self-adjusting choke whose flow rate in the inlet pressure change range tends to reverse - with increasing pressure the flow through it decreases. Dependent on the hydraulic characteristics of the hydraulic motor and the specific operating conditions.

Analysis of Flow Resistance Influence on Step-Down Process of the Control Rod Hydraulic Drive System

2021 ◽  
Author(s):  
Linqing Yang ◽  
Benke Qin ◽  
Hanliang Bo
Keyword(s):  
Theoretical Model ◽  
Flow Resistance ◽  
Inflection Point ◽  
Great Influence ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Drive System ◽  
Pressure Curve ◽  
Control Rod ◽  
Step Down

Abstract Control rod hydraulic drive system (CRHDS) is a new type of built-in control rod drive technology which is invented by INET, Tsinghua University. The integrated valve (IV) is the main flow control component of the CRHDS. Flow resistance of IV has a great influence on the control rod dynamic step-down process. The step-down performance experiments of CRHDS with different flow resistance of IV were conducted under room temperature conditions. Meanwhile, the theoretical model of hydraulic cylinder step-down process was established and combined with the relationship of the flow resistance of IV under the experimental conditions to get the dynamic response of the hydraulic cylinder. The calculation results of theoretical model agree well with the experimental data. On this basis, the theoretical model of hydraulic cylinder step-down process was applied to the high temperature working conditions with different flow resistance of IV. The analysis results show that at higher working temperature, with the increase of the flow resistance of IV control rod step-down average velocity decreases and step-down time increases correspondingly. There is an inflection point in the transient pressure curve and the pressure of the inflection point decreases gradually with the increase of the flow resistance. The pressure lag time after step-down also decreases. The research results lay the base for the design and optimization of the flow resistance of the IV for the CRHDS.

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