Analysis And Design Of The Electro-Hydraulic Proportional Control Systeem Of The Transporter

With the rapid economic development of our country,the construction of domestic high-speed railways has also entered a rapid development stage.The high-speed railway is no longer limited to China's coastal areas and the plains.Even hilly areas in the mountains have entered the high-speed rail construction boom.Viaducts and tunnels account for a large proportion of the railway.The total length of high-speed railways that have been allowed to start at the end of 2008 has reached 9.543 kilometers,of which bridges and tunnels account for as much as 60%.When the width and height of the separated bridge erector and beam carrier designed at the beginning were passed through the tunnel,the overall size of the bridge was too large.Therefore,when passing through the tunnel,the procedure was extremely complicated.It was necessary not only to dismantle the oversized parts,but also to increase the difficulty of construction.It has greatly reduced the efficiency of construction and delayed the construction progress of high-speed railways in the mountains.In the construction of high-speed railways in mountainous and hilly regions,the construction of special projects with direct connection between tunnels and bridges often occurs,and it is difficult for separating bridge girder erection machine and girder-transporting vehicle to play its role.This paper takes the transport-erect machine as the research object and relies on the engineering practice.The "TTYJ-900 transport-erect machine " developed by Tianye Tolian Heavy Industry Co.has some problems that cannot be ignored in the use of the Nanqin Passenger Dedicated Line,such as front and rear carriers being out of synch,high fuel consumption and other safety hazards.This article starts from the actual engineering practice,studies the mechanical structure of the truck-mounted machine,analyzes and designs the electromechanical-hydraulic proportional control system,and faces the problem of differences between the theoretical simulation and the actual practice,and conducts the operation of the freight-integration machine for several months.Follow-up study,and finally put forward four improvements for the "TTYJ-900 transport rack one machine" :the synchronization of the front and the rear of the beam-carrying vehicle?the synchronization problem of the hoisting height?the suspension lifting problem and large Car car synchronization problem.After the improvement of the results of this paper,the performance of the transporter integrated machine has been practically verified in practical projects.The improvement of synchronization has also solved the problem of power matching and fuel waste.In practical operation,it saves about 10% of fuel and saves Economic costs.The problem of hanging off the ground in the process of feeding the beam has also been improved,which has increased the reliability in the construction of the project and reduced the safety hazards when the carts are walking synchronously.