The Bascule Bridge for Seville, a New Concept of Hydraulic Control ...
The Bascule Bridge for Seville, a New Concept of Hydraulic Control ...
The Bascule Bridge for Seville, a New Concept of Hydraulic Control ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
- 3. Advantages <strong>of</strong> hydraulic drives <strong>for</strong> bascule bridges0<strong>The</strong> bascule bridges <strong>for</strong> <strong>Seville</strong> show clearly the advantages <strong>of</strong> the hydraulicdrive. If compared to an electric mecanical drive the following features are <strong>of</strong>nportance:- <strong>The</strong> pump control systems <strong>of</strong>fer low energy consumption- Starting efficiency <strong>of</strong> hydraulic cylinders is high. <strong>The</strong> installed power canbe almost reduced to the demands <strong>of</strong> running efficiency.- Acceleration, decelleration and synchronization are smouth and controllable.- <strong>Hydraulic</strong> cylinders are direct linear drives. Installation is pratically unlimited,as pump drive and actuators can be separated.- If properly installed hydraulic drive are environmentally clean.Some more general features <strong>of</strong> electric- mechanical drives versus hydraulic drivesare shown in Fig. 10.eIt is evident that hydraulic cylinder drives <strong>for</strong> bascule bridges are very attractive<strong>for</strong> civil engineering.Dr.-Ing. Peter Wiisth<strong>of</strong>Mannesmann Rexroth GmbH, D-97816 Lohr15.06.1994
Fig. 1 : Basic principle <strong>of</strong> the throttle control system
*Fig.1 : Perfomsnce potential <strong>of</strong> the rirnttie control system
a Fig. 3 : Basic principle <strong>of</strong> a pump control system
eFig. 4: Perfomance potential <strong>of</strong> the pump control system
Fig. 5: <strong>The</strong> Santa Maria passing the bascule bridges
Fig. 6: Block diagram <strong>of</strong> hydraulic system
aFig. 7: A4VSO pumpe with control card VT 5035
aFig. 8 : cross section <strong>of</strong> a check Q-meter
Diagrama de transLacion-aper turabf fnen2x201 acarretera 1IIII carretera 2Iii20 sec,3,8 m/min309 mm,75 sec; 4119 mm 1 220 see)75 sec; 4119 mm I 1 I.r dFII' 0.6 m/rnin\-1 t Lsecl* ki Cmml,309 mm95 sec / I I I)I" I0"- 20" 73, So-82"carretera 1II'30" 73, So-82"- carre tera 2-c i erresch l i epencarretera 2LIII carretera 1I -1 t Csecli* ti Cmml* 363 mm'I A192 sec; 4119 mm 1 120 sec,92 see; 4119 mm I 1 11112 see I I I" I82"- 65"?,So- 0"carretera 2II82" 7,s"- 0" - carretera 1vFig. 9 : Drive digram <strong>of</strong> the railway bridgePuente basuclante-Sevilla, Puente ferroviario
1 / FeaturesElectric ~nechanical drive I <strong>Hydraulic</strong> cylinder drive@ StartinagEM x 71 Gear(high)Cyl.AccelerationI Decelerationless controlablesmooth,controlableInstallationlimited due to mech.drive trainunlimited(direct linear drive)ServiceMaintenancelubricationmech. gearno service,reliable after pears@ Environmentgrease frommech. partsclean if properly/ StructuralI vibration/ (<strong>Bridge</strong>s)Positionmeasuringsystemcritical at stiffstructures(slack gear)externalnot sensitiveto vibrationinternal, integrated incylinder,(option)rwetalllic parts(shafts)ce~-arniicpiston rodFig. 10 : Civil EngineeringElectric mechanical drive versus hydraulic cylinder drive
Change language