Voith Turbo Couplings with constant filling - …

1 1 Voith Turbo Couplings with constant filling2 Applications:Material Handlingand Conveying Belt conveyors Bucket wheel conveyors Chain and link conveyors Port loading plantsMineral Processing Machines Crushers Shredders MillsMining Above & Below Ground Chain and armouredconveyors Tunnelling machines Bucket wheel excavators Pumps Crushers MillsChemical Industry Centrifuges Pumps Fans Mixers(In some of the illustrationsthe required guards areremoved to improve visibility.)As an expert in difficult applications inpower transmission Voith continuesto meet the increasing requirementsthrough innovative product designand Voith Turbo Couplingsare used with electric motors in awide range of applications, especiallywhen highest powers, economy andreliability are Voith Turbo coupling with its in-herent hydrodynamic advantages hasproven itself in millions of applicationsworldwide: smooth acceleration of the largestmasses suitable for economically pricedsquirrel cage motors load free start-up and run-up ofmotor no motor modification required torque control during start-up effective shock-absorption overload protection for motor andmachine load compensation for Couplings proven a million times3 The Voith Turbo coupling is a hydro-dynamic coupling based onFoettinger s Principle.

2 Its main com-ponents are two bladed wheels apump wheel and a turbine wheel aswell as an outer shell . Both wheelsare positioned relative to each is achieved with minimal me-chanical wear as there is no mechani-cal contact between power-transmit-ting coupling contains a constantquantity of operating fluid, usuallymineral torque transmitted by the drivemotor is converted into kinetic energyof the operating fluid in the pumpwheel to which the motor is connect-ed. In the turbine wheel, this kineticenergy is converted back into me-chanical energy. When it comes tothe function of the coupling , threemodes are to be noted:F ttingers concept Design and functionStartingThe pump-wheel acceler-ates the operating fluid asrevolutions in the drive-motor increase, so that acircular flow of fluid iscreated in the workingchamber. The entire blad-ed surface of the turbinewheel is impacted andthus set in motion throughkinetic energy.

3 The torquedevelopment during thestarting procedure is indi-cated by the characteristiccurve of the operating fluid inthe coupling is staticOperation at NormalRatingOwing to the minimal dif-ference in speed betweenthe pump and turbinewheel, a constant flow isachieved in the the demand torquefrom the machine is skillful coordina-tion of compensatingchambers, such as thedelay chamber and the an-nular chamber shell , thestarting performance of theTurbo coupling can be reg-ulated (see characteristiccurves on page 4).4A suitable coupling for any driveEssential performance factors for acoupling are the power and speed ofthe drive established the nominalpower and speed required, the dia-gram on the right enables determina-tion of the appropriate size of conditions require differentstarting procedures (characteristiccurve) for the coupling . Important cri-teria in this respect are the mass mo-ment of inertia, torque limitation andfrequency of the table below different types ofcouplings and their starting conditionscan be TTyp TVTyp TVVTyp TVVS300400600800 100020003000 4000(50 Hz)600900 120018003600(60 Hz)Silumin hot-quenched[KW]0,370,550,751,11,52,2345 ,57,511152230455575110160200250400500600 8001200160020003200750 Input speed [min-1]Rated power inputExample.

4 Start-up speed 1500 min-1 Rated power55 kWCoupling size4221150 D11501000866750562487422366206 D206154 D1541500650274 D274120 Motor run-upSpeedTorque2 Run-updriven machineSpeed1,61,41 Time 5 curvesM/MNMMMKM/MNMKM/MNMKMMML= motor torqueMM= load torqueML= coupling torqueMK= rated torqueMNM= coupling Type T is the basicversion of constant -fill Couplings ,consisting of pump wheel, turbinewheel and outer further range has been created bythe addition of other parts to thisbasic Turbo coupling is normallymounted on the machine shaft orgearbox shaft to be driven (outerwheel drive). In order to compensatefor any slight installation inaccuracies,a flexible connecting coupling is usedto join coupling and input shaft. Op-tional designs are available for mountarrangements which are radially re-moveable without disturbing motorand reducer of this type of coupling isrecommended when vibration andoverload protection are required formotor and machine; they may also beused for simpler transmissionsystems in the lower basic type Turbo coupling Type T SizeTypeADLd1d2l2 Weight kg1) ,5154DT1021901653228805,8206T97248183424 28011,5206DT137248223424211514,7274T1353 2829165559023274DT175328331655512530366T 198424357756512056422T218470391908013579 487T24655643610090155122562T269634490120 110170189650T317740591140120200297750T36 6842529140135240431866T42197861016015026 56441000T44111186511801602809651150T5051 29571518018032013371150DT830129510401801 7055016771)Weight with connecting coupling and max.

5 Oil filling . d1LA D d2I2 Applications Bucket-wheel equipment Excavators Mixing, kneading and stirringmachines6 This version features a delay-fillchamber which is flange-connectedto the outer wheel of the coupling (Type TV). At stand-still, a proportionof the working fluid lies in this cham-ber, thus reducing the volume in theworking chamber. Hence on motorstart-up, a reduced coupling torque istransmitted, simultaneously providingan unloaded motor start. After themotor has run up, the working fluidflows from the delay-fill chamber intothe working chamber which smoothlyaccelerates the driven machine up toits operating , if the application sodemands, the delay-fill chamber canbe further enlarged (Type TVV), thusenhancing its effects and further re-ducing the coupling torque on motorstart, as well as resulting in evenlonger and smoother start up of thedriven certain cases, the function of thedelay chamber can be additionallyimproved through centrifugally con-trolled valves (Type TVF) or throughhydrodynamic refill (Type TVY).

6 Smoother start up Turbo coupling Type TV and TVV SizeTypeADLd1 max. l2 Weight kg1)274TV17232832865559038274 TVV20432836065559039274 DTV244328403655510545366TV22542438475651 2061366 TVV295,5454,5756512064422TV2574704309080 13588422 TVV335508908013592487TV29755648710090155 126487 TVV38257210090155136562TV333634554120110 170198562 TVV428649120110170206650TV38474065814012 0200307650 TVV494768140120200322750TV44084260314013 5240454750 TVV567730140135240472866TV49397868216015 0265668866 TVV6418301601502656961000TV5471118757180 1602809431000 TVV6868961801602809821150TV6701295880180 18032011801150 TVV8831093180180320 12331)Weight with connecting coupling and max. oil d2 d1l2 ALALA pplications: Belt conveyors Chain conveyors Centrifuges, decanters Tube Mills High-inertia machinesSizeTypeADLd1d2l2 Weight kg 1) )Weight with connecting coupling and max. oil further Voith development is the an-nular-chamber shell additional to theenlarged delay chamber (Type TVVS).

7 The additional chamber in thecoupling shell enables further reduc-tion of the starting torque. During theinitial rotations of the start-up proce-dure, centrifugal forces cause theouter chamber of the coupling to becompletely filled with operating fluidfrom the bladed comparison with Couplings withoutannular chamber, filling of the bladedarea of a TVVS coupling is consider-ably reduced, which, in turn, reducesthe torque transmitted during increase in torque then followsthrough gradual emptying of the fluidfrom the delay chamber into the blad-ed starting procedure can be adapt-ed to the requirements of the applica-tion by adjustable nozzle new concept for Couplings wasdesigned especially for conveyor beltdrives. Through the gradual build upof torque an automatic adaptation tobelt load conditions is innovative one Turbo coupling Type TVVS d1 LADl2 d2 Application Belt conveyors8 The v -belt, timing belt, or flat beltpulley which is flanged to the bearingcover allows various transmission ra-tios to be accommodated.

8 If required,the pulley may be easily and TVRI type Turbo Couplingsare normally installed on the motorshaft in an overhung position. Thebelt force is supported by a bearing inthe bearing cover on the type Turbo Couplings can be in-stalled both as starting aid and over-load protection. Type TVRI with addi-tional delay chamber is recommend-ed if a particularly smooth start-up pulley drives Turbo coupling Type TRI/TVRI SizeTypeADBdtdWeight kg1) ,5206 DTRI137248701164212,5274 TRI1373281001505525274 TVRI1723281001505528,5274 DTRI1753281351656033274 DTVRI2423281351656038366 TRI1984241451606542366 TVRI2254241451606549422 TRI2054701601827065422 TVRI257,54701601827071487 TRI2465562012339099487 TVRI29755620123390109562 TRI269634294265100162562 TVRI333634294265100174650 TRI317740 423105228650 TVRI384740 4231052461)Weight with max. oil filling without dA dtApplications Centrifuges and decanters Fans Mixers Crushers9 MTS mechanical thermal switchesAs protection against overheating, fu-sible plugs are order to avoid loss of operatingfluid through thermal overload, a me-chanical thermal switch MTS canbe achieving the response tempera-ture, the element activates a pinwhich then operates a on the type of circuit, thesignal can be used either as an alarmor to switch off the circuit element has to be re-placed after devices andaccessoriesBTS Non-contact thermal switchMonitoring of coupling temperaturestakes place without any activation of the switch.

9 No re-placement of the element is is ready for use as soon as thecoupling has cooled signal can be used either as analarm or to switch off the some cases BTS can be used asspeed and dismantling toolRequired for professional, safe fittingand well as the mechanical fitting anddismantling tool, a hydraulic pressuredevice is glassBy fitting a sight glass, the fluid levelin the coupling can be easily checkedwithout opening the order to provide solutions for anever greater variety of applications,our engineers and technicians havedeveloped additional types of con-stant-fill coupling with solid shaft andprimary coupling flangeThe coupling is fitted rigid to themotor shaft over a primary couplingflange. The weight of the coupling isthus carried by the motor shaft andthe load on the drive shaft is elastic connecting coupling is re-quired between the solid shaft on theoutput side and the driven using a specially designed flexibleconnecting coupling it is possible tofit or dismantle the coupling radiallywithout moving motor or special applications Additional typesTurbo coupling with brake flangeFor use with a breaking system, theturbo coupling can be equipped withan additional brake flange to which abrake-drum or brake-disc is coupling with twin circuit Type DT This coupling has two co-axial workcircuits operating in means of a double circuit the out-put of the same size coupling is effec-tively properties.

10 Such as starting andoverload protection are comparablewith those of basic Type T withoutdelay available sizes of Turbo CouplingType DT see performance characteri-stic diagram on page couplingwithout bearing cover Type TRIThis type is ideally suited for particu-larly small belt pulley with integral bearing isflanged directly to the coupling replacement of the beltdisc would be coupling with overhungpulley installation Type TRIn this simplified version of the pulleycoupling, the pulley is fitted to thecoupling shell in an overhung coupling TR is an economicalsolution for applications in the lowerpower OF COMPANIESCr 128 e Voith Turbo GmbH & Co. KGStart-up Box 1555D-74555 CrailsheimPhone (0 79 51) 32-0 Fax (0 79 51) 32-650 : drive concepts demand state-of-the-art technology, hence Voithdrives are present where exacting per-formance is of experience in the field ofhydrodynamics, continuous researchand development, state-of-the-art pro-duction technology and the Voithknow-how guarantee the quality of ourproduct and keep it at the fore-front oftechnological quality is certified under the codeDIN ISO engineers with their specializedproduct knowledge are at your dispo-sal to provide the optimum drive solu-tion for your companies and sales agen-cies in every continent ensure closecontact with our customers and guar-antee rapid.