福伊特VOITH液力耦合器英文手册

Voith TurboCouplingswith constantfilling12As an expert in difficult applications in pow er transmission Voith continues to meet the increasing requirements through innovative product design and performance.Constant-fill Voith Turbo Couplings are used w ith electric motors in a wide range of applications, especially w hen highest pow ers, economy and reliability are required.The Voith Turbo Coupling with its in-herent hydrodynamic advantages has proven itself in millions of applications worldwide:I smooth acceleration of the largest massesI suitable for economically priced squirrel cage motorsI load free start-up and run-up of motorI no motor modification requiredI torque control during start-upI effective shock-absorptionI overload protection for motor and machineI load compensation for multi-motor drives.3cal contact between power-transmit-ting parts.The coupling contains a constant q uantity of operating fluid, usually mineral oil.The torq ue transmitted by the drive motor is converted into kinetic energy of the operating fluid in the pump wheel to which the motor is connect-ed. In the turbine wheel, this kinetic energy is converted back into me-chanical energy. When it comes to the function of the coupling, three modes are to be noted:Föttingers concept –Design and functionStartingThe pump-wheel acceler-ates the operating fluid as revolutions in the drive-motor increase, so that a circular flow of fluid is created in the working chamber. The entire blad-ed surface of the turbine wheel is impacted and thus set in motion through kinetic energy. The torque development during the starting procedure is indi-cated by the characteristic curve of the coupling.StationaryAll operating fluid in the coupling is staticOperation at Normal RatingOwing to the minimal dif-ference in speed between the pump and turbine wheel, a constant flow is achieved in the coupling.Only the demand torque from the machine is trans-mitted.Through skillful coordina-tion of compensating chambers, such as the delay chamber and the an-nular chamber shell, the starting performance of the Turbo Coupling can be reg-ulated (see characteristic curves on page 4).A suitable coupling for any drive Essential performance factors for a Arraycoupling are the power and speed ofthe drive motor.Having established the nominalpower and speed required, the dia-gram on the right enables determina-tion of the appropriate size of thecoupling.Different 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 start-ups.In the table below different types ofcouplings and their starting conditionscan be compared.Typ TTyp TVTyp TVVTyp TVVS45Turbo Coupling Type T is the basic version of c onstant-fill c ouplings,onsisting of pump wheel, turbine wheel and outer shell.A further range has been c reated by the addition of other parts to this basic type.The turbo c oupling is normallymounted on the mac hine shaft orgearbox shaft to be driven (outer wheel drive). In order to c ompensate for any slight installation inaccuracies,a flexible connecting coupling is usedto join c oupling and input shaft. Op-tional designs are available for mountarrangements whic h are radially re-moveable without disturbing motor and reducer alignment.Installation of this type of coupling is re ommended when vibration and overload protec tion are required for motor and machine; they may also be used for simpler transmission systems in the lower performanc e range.The basic type –Turbo Coupling ”Type T”Applications–Bucket-wheel equipment –Excavators–Mixing, kneading and stirring machines6This version features a ”delay-fill chamb er“ which is flange-connected to the outer wheel of the coupling (Type TV). At stand-still, a proportion of the working fluid lies in this cham-b er, thus reducing the volume in the working chamb er. Hence on motor start-up, a reduced coupling torque is transmitted, simultaneously providing an unloaded motor start. After the motor has run up, the working fluid flows from the delay-fill chamber into the working chamber which smoothly accelerates the driven machine up to its operating speed.Furthermore, if the application so demands, the delay-fill chamb er can b e further enlarged (Type TVV), thus enhancing its effects and further re-ducing the coupling torque on motor start, as well as resulting in even longer and smoother start up of the driven machine.In certain cases, the function of the delay chamb er can b e additionally improved through centrifugally con-trolled valves (Type TVF) or through hydrodynamic refill (Type TVY).Smoother start up –Turbo Coupling ”Type TV” and ”TVV”Applications:– Belt conveyors – Chain conveyors– Centrifuges, decanters – Tube Mills– High-inertia machinesA further Voith development is the an-nular-chamber shell additional to theenlarged delay chamber (Type TVVS).The additional chamber in thecoupling shell enables f urther reduc-tion of the starting torque. During theinitial rotations of the start-up proce-dure, centrifugalforces cause theouter chamber of the coupling to becompletely f illed with operating f luidfrom the bladed area.In comparison with couplings withoutannular chamber, filling of the bladedarea of a TVVS Coupling is consider-ably reduced, which, in turn, reducesthe torque transmitted during motorrun-up.The increase in torque then f ollowsthrough gradual emptying of the fluidfrom the delay chamber into the blad-ed area.The starting procedure can be adapt-ed to the requirements of the applica-tion by adjustable nozzle screws.This new concept f or couplings wasdesigned especially for conveyor beltdrives. Through the gradual build upof torque an automatic adaptation tobelt load conditions is achieved.The innovative one –Turbo Coupling ”Type TVVS”Application– Belt conveyors8The ”v“-be lt, timing be lt, or flat be lt pulley which is flanged to the bearing cover allows various transmission ra-tios to be accommodated. If required,the pulley may be easily exchanged.TRI and TVRI type Turbo Couplings are normally installe d on the motor shaft in an ove rhung position. The belt force is supported by a bearing in the be aring cove r on the coupling hub.TRI type Turbo Couplings can be in-stalled both as starting aid and over-load protection. Type TVRI with addi-tional de lay chambe r is re comme nd-ed if a particularly smooth start-up is required.For pulley drives –Turbo Coupling ”Type TRI/TVRI”Applications– Centrifuges and decanters – Fans – Mixers – Crushers9MTS mechanical thermal switches As protection against overheating, fu-sible plugs are standard.In order to avoid los s of operating fluid through thermal overload, a me-chanical thermal switch – MTS – can be added.On achieving the res pons e tempera-ture, the element activate a pin which then operates a switch.Depending on the type of circuit, the signal can be used either as an alarm or to switch off the motor.The circuit element has to be re-placed after activation.Monitoring devices and accessoriesBTS – Non-contact thermal switch Monitoring of coupling temperatures take splace without any contact.After activation of the s witch, no re-placement of the element is required.It is ready for us e as s oon as the coupling has cooled down.The s ignal can be us ed either as an alarm or to switch off the motor.In s ome cas es BTS can be us ed as speed monitor.Fitting and dismantling tool Required for profes s ional, s afe fitting and dismantling.As well as the mechanical fitting and dismantling tool, a hydraulic pressure device is available.Sight glassBy fitting a sight glass, the fluid level in the coupling can be easily checkedwithout opening the coupling.10In order to prov ide solutions for an ev er greater v ariety of applications,our engineers and technicians hav e dev eloped additional types of con-stant-fill couplings.Turbo Coupling with solid shaft and primary coupling flangeThe coupling is fitted rigid to the motor shaft ov er a primary coupling flange. The weight of the coupling is thus carried by the motor shaft and the load on the drive shaft is relieved.An elastic connecting coupling is re-quired between the solid shaft on the output side and the driven shaft.By using a specially designed flexible connecting coupling it is possible to fit or dismantle the coupling radially without moving motor or gears.For special applications –Additional typesTurbo Coupling with brake flange For use with a breaking system, the turbo coupling can be equipped with an additional brake flange to which a brake-drum or brake-disc is fitted.Turbo Coupling with twin circuit “Type DT”This coupling has two co-axial work circuits operating in parallel.By means of a double circuit the out-put of the same size coupling is effec-tively doubled.The properties, s uch as s tarting and overload protection are comparable with thos e of bas ic Type T without delay chamber.For available sizes of Turbo Coupling Type DT see performance characteri-stic diagram on page 4.Pulley-type couplingwithout bearing cover Type TRIThis type is ideally suited for particu-larly small belt discs.The pulley with integral bearing isflanged directly to the coupling shell.Subs equent replacement of the beltdisc would be costly.Turbo Coupling with overhungpulley installation – Type TRIn this simplified version of the pulleycoupling, the pulley is fitted to thecoupling shell in an overhung fashion.Turbo Coupling TR is an economicals olution for applications in the lowerpower range.11G R O U P O F C O M PA N I E SC r 128 eVoith Turbo GmbH & Co. KG Start-up Components P.O. Box 1555D-74555 Crailsheim Phone (07951) 32-0Fax (07951) 32-650http://www.voith.deE-Mail: anfahrkomponenten@voith.deModern drive concepts demand state-of-the-art technology, hence Voith drives are present where exacting per-formance is demanded.Decades of experience in the field of hydrodynamics, continuous research and development, state-of-the-art pro-duction technology and the Voith know-how guarantee the quality of our product and keep it at the fore-front of technological development.Our quality is certified under the code DIN ISO 9001.Our engineers with their specialized product knowledge are at your dispo-sal to provide the optimum drive solu-tion for your applications.Marketing companies and sales agen-cies in every continent ensure close contact with our customers and guar-antee rapid service.ESPRIT, EXCELLENCE and EFFIZIENZ together symbolize the factors through which concepts are born and products created within the Voith Group.ESPR IT – researching and developing in the service of the customer.EXCELLENCE – staying ahead of the field.EFFIZIENZ – transforming individual achievement into corporate success.For our customers. For our staff. For our company.Competence inhydrodynamic drivetechnology。