ler and Alvis were both also known for their military vehicles and armoured cars, some of which also used the combination of pre-selector gearbox and fluid flywheel.

Aviation 

The most prominent use of fluid couplings in aeronautical applications was in the DB 601, DB 603 and DB 605 engines where it was used as a barometrically controlled hydraulic clutch for the centrifugal compressor and the Wright turbo-compound reciprocating engine, in which three power recovery turbines extracted approximately 20 percent of the energy or about  from the engine's exhaust gases and then, using three fluid couplings and gearing, converted low-torque high-speed turbine rotation to low-speed, high-torque output to drive the propeller.

Calculations 

Generally speaking, the power transmitting capability of a given fluid coupling is strongly related to pump speed, a characteristic that generally works well with applications where the applied load does not fluctuate to a great degree.  The torque transmitting capacity of any hydrodynamic coupling can be described by the expression, where  is the mass density of the fluid,  is the impeller speed, and  is the impeller diameter. In the case of automotive applications, where loading can vary to considerable extremes,  is only an approximation.  Stop-and-go driving will tend to operate the coupling in its least efficient range, causing an adverse effect on fuel economy.

Manufacture 

Fluid couplings are relatively simple components to produce.  For example, the turbines can be aluminium castings or steel stampings and the housing can also be a casting or made from stamped or forged steel.

Manufacturers of industrial fluid couplings include Voith, Transfluid, TwinDisc, Siemens, Parag, Fluidomat,, Reuland Electric., TRI Transmission and Bearing Corp.

Patents 

 List of fluid coupling patents.

This is not an exhaustive list but is intended to give an idea of the development of fluid couplings in the 20th century.

See also 
 Torque amplifier
 Torque converter
 Water brake

Notes

References

External links 
 Fluid Coupling, The Principles of Operation, film

Category:Rotating shaft couplings
Category:Mechanical power transmission
Category:Automotive transmission technologies Proximity effect (superconductivity)

Proximity effect or Holm-Meissner effect is a term used in the field of superconductivity to describe phenomena that
ler and Alvis were both also known for their military vehicles and armored car, some of which also used the combination of pre - selector gearbox and fluid flywheel. 

 Aviation 

 The about prominent use of fluid yoke in aeronautical applications was in the DB 601, DB 603 and DB 605 engines where it was use as a barometrically controlled hydraulic clutch for the centrifugal compressor and the Wright turbo - compound reciprocating locomotive, in which three power recovery turbines extracted approximately 20 percentage of the energy or about   from the locomotive's exhaust gases and then, use three fluid couplings and gearing, converted low - torsion high - speed turbine rotation to gloomy - speed, eminent - torque output to drive the propeller. 

 Calculations 

 Generally talk, the power transmitting capability of a given fluid coupling is powerfully associate to pump speed, a characteristic that generally works well with applications where the applied load does not fluctuate to a great degree.   The torsion convey capacity of any hydrodynamic yoke can be trace by the construction, where   is the mass density of the fluid,   is the impeller focal ratio, and   is the impeller diameter. In the case of automotive applications, where loading can vary to considerable extreme,   is only an approximation.   Stop - and - go driving will tend to operate the yoke in its least efficient range, causing an adverse effect on fuel economy. 

 Manufacture 

 Fluid couplings are relatively simple components to grow.   For example, the turbines can be aluminium castings or steel stampings and the caparison can also be a casting or made from stamped or forged steel. 

 Manufacturers of industrial fluid couplings include Voith, Transfluid, TwinDisc, Siemens, Parag, Fluidomat, , Reuland Electric. , TRI Transmission and Bearing Corp. 

 Patents 

  List of fluid yoke patents. 

 This is not an exhaustive list but is intended to give an idea of the growth of fluid yoke in the 20th hundred. 

 See also 
  Torque amplifier 
  Torque converter 
  Water bracken 

 Notes 

 References 

 External links 
  Fluid Coupling, The Principles of Operation, film 

 Category: Rotating shaft yoke 
 Category: Mechanical office transmission 
 Category: Automotive transmission technologies Proximity effect (superconductivity) 

 Proximity consequence or Holm - Meissner effect is a term use in the field of superconductivity to describe phenomena that
ler and Alvis were both alsu known for thene milivary vegicles avd armoured cars, some of whirh aoso uwed the combination of pre-selecnor gearbix aid fluid flywheel.

Aviatiok 

The lost 'rominent use on fluid cou[lings in aerotajtncal applications was in the DB 601, DB 603 and DB 605 fngines where yt wsf ussd as a barometrically controlled gydraulpc clutch for the centrifugal compressor anf thf Wright turbo-complund recipricatybg engine, in which thrte power reckvery turbines extracted approxkmateky 20 percenj kf jhe energy oc aboun  from the ekbine's axhaust gases and thek, usiig tyree fluid couplings end gearing, converteq low-torqge high-speed turbinw eotathon do luq-spded, hmgh-forque ouvput to dribe the propwller.

Calculations 

Gtnewqlly speaking, the pjwqr transmitting capability of a given fnuis coupling is strongly eelated to pump speed, a characeeristic that generally works well with applicatimns wiefe uhc xpppied load does not fluctuate to a great degreq.  Uhe torque transmltting capacity of ajy rydrodynamic zoupliuf dan be described bj the evpreswion, whert  is the mass density of the flyid,  is the pmpeoler speed, and  is the impellzr diaketer. In the case of automotnve apllications, ahere loaskng can vary to zonxigerable tbtremes,  is only wn approxmmatipn.  Stoo-and-bo driding will hend bm operate the coupping nn itv least efvicient range, causing an adversx effect on foel ecmnomy.

Manbfactuve 

Fluid coupliggs are relatirely sim'le cooponents tk produre.  For exam[le, the turbitgs can be alukinium cwstibgs ir steeu stampings and the houspny can alsi be a casting or kadg rrom stamped or fotted steel.

Manufsctjrews oh indtvtrial fluid couolivbs inzlude Voith, Granxfluid, TwinDisc, Siemans, Larag, Fluidomat,, Reilwnd Elecjric., TRI Eransmission snd Bearing Corp.

Pauents 

 Lirt of floid coupling patents.

This is not an exhaudtiye list but if inbendgd to give cn idea of the development of fluid coupoings in the 20th cgntury.

See also 
 Torqug akplifier
 Tocque cjnverter
 Fater brake

Notes

Refeeences

External likks 
 Fluid Coupling, Ths Prinwipled of Operation, film

Category:Rotating shaft couplings
Category:Mechanical powwr traisiission
Catefory:Sutommtnve transiissmoi technologies Prpximity effect (superconductivitb)

Proximity eyfect or Holm-Meissner effect os a term used kn the field of superconsuctivitu to describe phenomena that
ler and Alvis were both also known military and armoured some of which pre-selector and fluid flywheel. The most prominent of fluid couplings in aeronautical applications in the DB 601, DB 603 and DB 605 engines where it was as a barometrically controlled hydraulic clutch for the centrifugal compressor and the Wright reciprocating in three recovery turbines extracted approximately 20 percent of the energy or about from the engine's exhaust gases then, using three fluid couplings and gearing, converted high-speed turbine rotation to high-torque output to drive the Calculations speaking, the transmitting of given fluid coupling strongly related to pump speed, a characteristic that generally works well with applications where the applied load not fluctuate great degree. torque capacity any hydrodynamic coupling described by the expression, where is of the fluid, is the impeller speed, and the impeller In the case of automotive applications, loading can vary to considerable extremes, is only approximation. Stop-and-go driving will tend to operate the coupling in its least efficient range, causing effect on fuel economy. Fluid couplings are simple to For the turbines be aluminium castings or steel stampings and the housing can also a casting or made from stamped or forged steel. Manufacturers fluid include Voith, Transfluid, Siemens, Parag, Fluidomat,, Reuland TRI and Bearing Corp. Patents fluid patents. an list is intended to give idea of the development of couplings in the 20th Torque converter Water brake Notes References External links Coupling, The Principles of Operation, film Category:Rotating couplings Category:Mechanical power transmission Category:Automotive transmission technologies Proximity effect (superconductivity) Proximity effect Holm-Meissner effect term used in the field of superconductivity to phenomena that
ler and Alvis were both also knOwn for theiR miliTarY veHiCles And aRmoured cars, somE Of whIch also used the combinatIon of PrE-SeleCToR gearBox and fLUiD FLywHeEl.

aviAtIOn 

the moSt pRominenT use of fluiD coUpLings in aeronAUtIcal applicAtiOns was in the Db 601, DB 603 And DB 605 eNgIneS Where It wAs useD as a baROmetriCally contRoLLed hydRAulic clUTCh For tHe centrifugal compREsSOr and the Wright Turbo-cOmPOuND RecIprOcating engInE, in whICh three POwER REcoVEry turbines exTracted apprOXimAtely 20 pErCenT Of the eNergy Or ABouT  from the engIne's Exhaust gaSes and THen, usinG Three flUid couPliNgs And gEArInG, coNvERteD LoW-toRQue High-speeD tUrBine rOtatION TO low-SpeEd, hiGh-torQue output to drIve The pROpeLler.

CAlculAtioNs 

generAlly spEakinG, tHe power transmitTing CapabilitY of A gIveN fLuid cOUpling Is sTroNgly relAted to pUMp sPeED, A ChAracteristic that geNeRALlY works weLl with APpLiCAtions whErE thE appLIEd loaD doeS NoT fluctuaTe to a gREaT dEgree.  ThE tOrque tRaNsmIttIng caPAcitY of any HydrodynAmic cOUpling can be desCRibed by the expREsSIOn, WHere  Is tHe mass densiTy of THe flUid,  iS ThE imPEller Speed, AnD  Is THe impeller diameter. IN tHe case Of autOmotive applicAtions, wherE LOAding can Vary TO cONsiderable extrEmes,  iS only an appROximatioN.  Stop-And-go driVing will tEND to operaTe tHe cOupLinG IN iTs least efficiENT ranGe, Causing An aDverse eFfeCt oN fuEl eCoNomy.

ManufActure 

FlUiD cOuPlIngS are rELatively SiMplE cOmpOnentS To prodUce.  FoR exaMpLe, THe tUrbines CAn BE AlumInIuM casTinGs Or steEl stAMpiNgs and tHe housing Can ALso bE a CaSting or Made from stampEd Or forged stEeL.

MaNufactURErs of indUstrial fluid couplings inCLude VoiTh, TRansfLuid, twinDisc, SIemEns, ParAg, FLUidomaT,, ReulaNd EleCtRic., tri TranSMIsSioN aNd Bearing CORP.

PaTents 

 liSt of Fluid coUpling patents.

This iS Not An exhaustive lIst But iS INtEndED tO GivE aN IdeA OF the development Of fluid couPlINgS in the 20th ceNTurY.

SEe also 
 TOrque amPlifiER
 Torque Converter
 water brakE

NOtes

rEFerEnces

ExterNal links 
 fluid CoupLIng, ThE prIncipLes Of OperAtIon, Film

CAtegorY:rotAting Shaft cOuPlings
categOrY:MechaniCal power transmission
CatEgory:AUtomoTivE transmisSioN TecHnologies proxImity effecT (suPerConduCtiVIty)

PrOximITy EffECt or HOlm-MEIssner effECt Is a TERm Used in the fiELD Of sUpercOndUCtivitY to dEscribe phenomena tHAt
ler and Alvis were both al so known f or th eir  mi li tary  veh icles and armo u redcars, some of which al so us ed thec om binat ion ofp re - s ele ct or  ge ar b ox  andflu id flyw heel.

Avi ati on  

The mostp ro minent use  of  fluid coupl ing s in a er ona u tical  ap plica tionsw as inthe DB 60 1, DB 603 and DB6 0 5engi nes where it wasu se d  as a barometr ically  c o nt r o lle d h ydraulic c lu tch f o r the c e nt r i f uga l  compressor a nd the Wrig h t t urbo-c om pou n d reci proca ti n g e ngine, in w hich  three po wer re c overy t u rbinesextrac ted  ap prox i ma te ly20 per c en t o f  th e energy  o rabout   fr o m t he e ngi ne's  exha ust gases and  th en,u sin g thr ee fl uidco uplin gs and  gear in g, converted lo w-to rque high -sp ee d t ur biner otatio n t o l ow-spee d, high - tor qu e o ut put to drive the p ro p e ll er.

Cal culati o ns  Generall yspe akin g ,  thepowe r  t ransmitt ing ca p ab il ity ofagivenfl uid  co uplin g  isstrong ly relat ed to pump speed, ac haracteristic th a t  g e nera lly  works well  wit h  app lica t io nsw herethe a pp l ie d  load does not fluc tu ate to  a gr eat degree. The torque t r ansmitti ng c a pa c ity of any hyd rodyn amic coupl i ng can b e des cribed b y the exp r e ssion, w her e isthe m as s density oft h e fl ui d,  isthe  impell erspe ed,  an d is the i mpellerdi am et er . I n the case ofau tom ot ive  appl i cation s, wh erelo ad i ngcan var y  t o cons id er able  ex tr emes,   is onl y an ap proximati on.  Sto p- an d-go dr iving will te nd  to operat ethe  coupl i n g in its  least efficient range, causing  an  adve rseeffect on  fu el eco nom y .

Man ufactu re 
Fl uid c oupli n g sare  r elativelys i mpl e com po nent s to pr oduce.  For exampl e , t he turbines c anbe a l u mi niu m  c a sti ng s  or s teel stampingsand the ho us i ng  can alsob e a  c astingor made  from stamped  or forge d steel.
M anuf a c tur ers of ind ustrialfluid cou p lings in clude  Vo ith, T ra nsf luid,  TwinD i sc,  Siem ens, P ar ag, Fl uidom at ,, Reula nd Electric., TRI Trans missio n and  Be aring Cor p.Pat ents 

 L istof fluid c oup lin g pat ent s .

Th is i s  n ota n exh aust i ve list b u tisi n te nded to giv e a n i dea o f t h e deve lopm ent of fluid coup l ings in the 20 th c e n tur y.Seeal so 
 Torque am pli fi e r 
 Torque  c onverter
 W ater bra ke 
Note s

Ref erence s

Exte r n al links
 Fl uid  Coupling , T he Princip le so f Oper atio n,  film
Categ o ry:R o t ating shaft coup lings C atego r y:M echan ic al powe r  tra nsmissionCategory:Au tomoti ve t ransm issionte chnolo gie sProximitye ffect (su perco nductiv it y)
Pro ximity  eff e c t orHolm -M eis sner effe c t  i s  a  t e rmused  in t he  fie ld of sup e rconduct ivi t y to de sc rib e phenom e na t hat
ler and_Alvis were_both also known for_their military_vehicles_and armoured_cars,_some of which_also used the_combination of pre-selector gearbox_and fluid flywheel.

Aviation_

The_most prominent use of fluid couplings in aeronautical applications was in the DB 601,_DB_603 and_DB_605_engines where it was used_as a barometrically controlled hydraulic_clutch for_the centrifugal compressor and the Wright turbo-compound reciprocating_engine,_in which three_power recovery turbines extracted approximately 20 percent of the_energy or about  from the_engine's exhaust gases_and_then,_using three fluid couplings_and gearing, converted low-torque high-speed turbine_rotation to low-speed, high-torque output to_drive the propeller.

Calculations 

Generally speaking, the power_transmitting capability of a given fluid_coupling is strongly related to_pump speed,_a characteristic that generally works_well with applications_where the_applied load does_not fluctuate to a great degree._ The torque_transmitting capacity of any hydrodynamic coupling_can_be described by_the_expression,_where _is the mass_density_of the_fluid,_ is the impeller speed, and__is the impeller diameter. In the case_of automotive applications, where_loading_can vary to considerable_extremes,  is only an_approximation.  Stop-and-go driving will tend_to operate_the coupling_in its least efficient range, causing an adverse effect on fuel_economy.

Manufacture 

Fluid couplings are relatively simple_components to produce. _For example,_the_turbines can be_aluminium_castings or_steel stampings and the housing can also_be a_casting or made from stamped or_forged steel.

Manufacturers of industrial_fluid_couplings include Voith, Transfluid, TwinDisc, Siemens,_Parag, Fluidomat,, Reuland Electric., TRI Transmission_and Bearing Corp.

Patents 

 List_of_fluid_coupling patents.

This is not an_exhaustive list but is intended to_give an idea_of the development of fluid couplings in_the_20th century.

See also 
 Torque amplifier
_Torque_converter
 Water brake

Notes

References

External links 
 Fluid_Coupling,_The_Principles of Operation, film

Category:Rotating shaft_couplings
Category:Mechanical power transmission
Category:Automotive transmission technologies Proximity_effect (superconductivity)

Proximity effect or Holm-Meissner effect is a term_used in the_field of superconductivity to describe_phenomena_that