The Discuss about the New Approach of the Structural Layout of Belt Type Sintering Machine

2012 ◽  
Vol 430-432 ◽  
pp. 2058-2061
Author(s):  
Xue Jiao Wang ◽  
Ming Hua Bai ◽  
Su Bo Ren ◽  
Jian Wei Chen
Keyword(s):  
Hydraulic System ◽  
Thrust Force ◽  
Mechanical Equilibrium ◽  
New Approach ◽  
Sintering Machine ◽  
Structural Layout ◽  
Wheel Drive ◽  
Sprocket Wheel ◽  
Structure Layout

Existing sintering machine for controlling of arch camber is not ideal. The usual way is by means of the hydraulic system to balance the excess thrust what is caused arching. For this reason, the paper considers to change the structure layout of belt sintering machine ,so that eliminate the arch camber by itself. So improvement of process layout of 60㎡ sintering machine has been made, and thus deduced the expression and got the limen formula of the thrust force which the back sprocket wheel drive lower pallet cars. At the same time, through the analysis and compute got driving moment of lower pallet cars, which caused by four pallet cars from back sprocket wheel. According to equation of mechanical equilibrium to eliminate the arch of pallet cars, determine the suitable angle after sintering machine has been improved to solve the problem about arch pallet cars completely.

Multi-Fields Coupled Simulation on Casting Process of Aluminum Alloy Based on Heat Conduction by Rotating Heat Pipe Bundle

2012 ◽  
Vol 621 ◽  
pp. 237-245
Author(s):  
Jian Mei Chen ◽  
Yu Qiang Li ◽  
Jia Qiang E
Keyword(s):  
Aluminum Alloy ◽  
Heat Conduction ◽  
Heat Pipe ◽  
Heat Pipes ◽  
Casting Process ◽  
Working Process ◽  
New Approach ◽  
Molten Liquid ◽  
Ingot Solidification ◽  
Structure Layout

Based on the knowledge to defects and advantages of traditional ingot casting, a new approach for casting of aluminum alloy ingot, based on heat conduction by rotating heat pipes, is put forward in this paper. Different from the conventional casting method that cooling around ingot, the microstructure and properties of casting ingots can be significantly improved due to cooling of molten liquid from the central by rotating heat pipes proposed by this paper. Through simulation on the working process and the fields of flow and temperature, it can be speculatively seen that the ingot solidification is from inside to outside and that inner stress inside the ingot is compressive. The influences of speed of heat pipe bundle, casting speed and casting temperature on the temperature field in the ingot have been systematically studied. The ingots with different sizes can be prepared by changing size and structure layout of the heat pipes.

Dry Wellhead Completion for Mono-Column FPSO Units Operating in Ultradeep Waters

2009 ◽  
Author(s):  
Marta C. T. Reyes ◽  
Alexandre T. P. Alho ◽  
Peter Kaleff ◽  
Isaias Q. Masetti
Keyword(s):  
Vertical Motion ◽  
Design Issues ◽  
Floating Structure ◽  
Structural Layout ◽  
Column Design ◽  
Structure Layout

A floating structure is proposed to act as a dry wellhead completion support for a mono-column design developed by Petrobras: the MONOBR FPSO. After the discussion of the design issues involved, the MONOBR design is introduced and the peculiarities affecting the insertion of a floating structure into its moonpool are analyzed. In what follows, the main characteristics of the proposed floating structure layout are presented in the context of its purpose of allowing for the effortless vertical motion relatively to the housing mono-column unit, followed by the considerations pertinent to the ballast system devised to allowing for the adequate operation, by the characteristics of the roller mechanisms proposed to ensure the aligned motion desired and by the analysis of the structural issues and the proposed structural layout.

Control of the Vehicle’s Running Properties As a Pre-Condition for Designing Wheel Drive Systems

2001 ◽  
Author(s):  
V. V. Vantsevich ◽  
L. Amani
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation ◽  
Modeling And Simulation ◽  
Objective Function ◽  
Fuel Consumption ◽  
New Approach ◽  
Single Criterion ◽  
Wheel Drive ◽  
Drive Systems ◽  
Theoretical Developments

Abstract The paper presents a new approach of designing optimal wheel drive systems which improve considerably vehicle properties; including traction and velocity properties, fuel consumption, turnability, and ride stability. This approach creates the basis for synthesizing optimal circumferential wheel forces needed for designing optimum wheel drive systems for a particular vehicle. At the beginning the optimum circumferential wheel forces should first be computed. These forces correspond to the optimum values of vehicle properties’ criteria simultaneously taken in aggregate with the required vehicle kinematics. A single criterion optimization with limitation of the rest of criteria and limitation of optimized parameters is being presented. The objective function is being built for vehicles transporting a useful load. All these theoretical developments are followed by the results of the mathematical modeling and computer simulation of an 8WD vehicle. The modeling and simulation are based on a previously developed algorithm for the optimization of the circumferential forces among the drive wheels (see [8]).

Series, Parallel, and Hybrid Series-Parallel Hydrostatic Transmission Architectures for Ground Locomotion

2019 ◽  
Author(s):  
Massimo Martelli ◽  
Pietro Marani ◽  
Silvia Gessi
Keyword(s):  
Numerical Simulation ◽  
Hydraulic System ◽  
Electronic Control ◽  
Hydraulic Circuit ◽  
Virtual Experiments ◽  
Hydrostatic Transmission ◽  
Wheel Drive ◽  
Performance Specifications ◽  
Wheeled Vehicles ◽  
Different Levels

Abstract Ground locomotion of wheeled vehicles, in all-wheel drive configuration, is subject to unique, generally highly variable and not predictable, loading conditions on the driveline subsystem. Any sensible design must cope at least with the effects induced by slope changes, asymmetrical losses of adherence and cornering maneuvers. When severe constraints on the driveline layout make the implementation of standard mechanical transmissions unfeasible, a typical option is given by compound hydrostatic transmission architectures, with multiple dedicated motor-wheels. Requirements are then defined on two different levels: at vehicle level, traction functionality must never be lost; at hydraulic circuit level, all components must work within their nominal operating ranges and hydraulic stresses must be limited. Common standard topologies for motor connection, viz. series and parallel, come with different strengths and weaknesses, often requiring the implementation of auxiliary highly dissipative compensation components and/or complex electronic control, while a hybrid series-parallel concept, derived from a patented application, based on three-port motors allows the implementation of an effective, purely hydraulic system. In the present work, a general comparison of the above-mentioned architectures is provided, by means of numerical simulation, over a wide set of virtual experiments. Each architecture is analyzed: its specific features are described and the correlation between hydraulic performance/specifications and vehicle traction performance is pointed out.

Optimal Design of Tooth Profile for Sprocket Wheel on No Arching Sintering Machine

2012 ◽  
Vol 567 ◽  
pp. 250-253
Author(s):  
Su Bo Ren ◽  
Ming Hua Bai
Keyword(s):  
Tooth Profile ◽  
Profile Curve ◽  
Sintering Machine ◽  
Theoretical Design ◽  
Before And After ◽  
Motion Characteristics ◽  
The Stability ◽  
Curve Equation ◽  
Sprocket Wheel ◽  
Actual Size

Aimed at the instability factors of no arching sintering machine in the operation, their causes is analyzed, from the theoretical design, the composite tooth profile curve of sprocket wheel is optimized. Combined with the motion characteristics of the pallet car and the conditions required, by choosing proper motional parameters, a unified curve equation of tooth profile is gained. According to the actual size of the sprocket wheel, the two composite tooth shape of sprocket wheel before and after optimization is compared, and the velocity and acceleration characteristics of the composite tooth profile curve are analyzed. The results show that the optimized composite tooth profile curve of the sprocket wheel is more simple and reasonable, and can improve the engagement condition of the sprocket wheel and the pallet car, easy to manufacture, these provide a theoretical basis for the stability operation of no arching sintering machine.

scholarly journals Development of a six-wheel drive vehicle: A comparative study on steering performance

2019 ◽  
Author(s):  
Abd Rahim Shuib ◽  
Mohd Azwan Mohd Bakri ◽  
Mohd Khairul Fadzly Md Radzi
Keyword(s):  
Oil Palm ◽  
Hydraulic System ◽  
Current System ◽  
Limiting Factors ◽  
Tractive Effort ◽  
Wheel Drive ◽  
Machine Configuration ◽  
Turning Radius ◽  
Fresh Fruit Bunches ◽  
The Right

The innovation for the recent agriculture tractors have been widely developed. These tractors are used to enhance the harvesting activities in way to lowering the labour cost. However, the current system of infield collection of oil palm fresh fruit bunches (FFB) by using mini-tractor-trailer (MTT) has its limitation. This MTT have poor traction on soft ground such as coastal and peat areas which give the limiting factors that prohibit the usage of any mini-tractor. Thus, the aim of this project is to fabricate a functioning prototype vehicle consist of two-wheel steering (2WS) and four-wheel steering (4WS) in measuring its performance of tractive effort and steering radius for usage in palm plantation. The machine configuration consists of main chassis, compartment to carry oil palm bunches, a mechanism for loading purposes, operator cabin, and associated hydraulic system. The laboratory test of performance evaluation were conducted to the developed vehicle. The results show that under 4WD mode, the turning radius of the vehicle was found to be 42.9% lesser if the 4WS mode is engaged. For 6WD with 4WS active, the turning radius was 46% lesser while turning for 42.2% lesser compared to 2WS. The slippage ranges are recorded between 8.5% to 22.5% where the slippage for the left wheel is negative as the left wheel rotates slower than the right wheel on the left turning of circular motion and vice versa. In addition, the vehicle design could be considered optimum as the measured tractive effort of the vehicle was found to be 32% of the vehicle gross weight. This is within the recommended tractive effort which is within a range of 30% to 36% of the suggested vehicle gross weight.

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