ARCUSAFLEX Highly torsionally flexible rubber disc coupling for internal combustion engine drives
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1 Highly torsionally flexible rubber disc coupling for internal combustion engine drives Your drive is our strength. Your strength is our drive.
2 Contents Seite General technical description... 3 Types... 4 Technical details standard version with single element... Technical detailsstandard version with elements operating in tandem... 7 Allgemeiner technischer Hinweis... 7 Technical details silicone version... Material / Selection of the proper coupling size... 9 Dimensional details of flywheel couplings Type ACT...F with taper bush... 0 Dimensional details of flywheel couplings Type AC...F with bolted hub... Dimensional details of flywheel couplings Type AC...FK with bolted hub for radial element change... Dimensional details of shaft couplings Type ACT...T and type AC...TK... 3 Dimensional details of flywheel couplings Type AC...D.F with elements operating in tandem... 4 Dimensional details of flywheel couplings Type AC...D.FK with elements operating in tandem and for radial element change... 5 Mounting instruction for flywheel couplings Type ACT...F with taper bush... Mounting instruction for flywheel couplings Tightening torques for couplings... 7 Mounting instruction for flywheel couplings Alignment / Permissible shaft displacement... Safety instructions... Requested Data for Coupling Selection / Torsional Vibration Calculation... DC Designed to Customer The principle of Designed to Customer describes the recipe for success: Utilizing our product knowledge, our customers are supplied with couplings which are developed and tailormade to their specific requirements. The designs are mainly based on modular components to provide effective and efficient customer solutions. The unique form of close cooperation with our partners includes consultation, design, calculation, manufacture and integration into existing environments. Adapting our manufacturing to customerspecific production and utilizing global logistics concepts provides better after sales service worldwide. This customeroriented concept applies to both standard products and production in small batch sizes. Edition March 03 The present edition renders parts of the previous catalogues obsolete. All dimensions in millimeters. We reserve the right to change dimensions and / or design details without prior notice. Proprietary notice pursuant to ISO 0 to be observed: The reproduction, distribution and utilization of this document as well as the counication of its contents to others without explicit authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design. AC_Pros_e_033
3 General technical description The coupling is a highly flexible flywheel coupling with an axial plugin facility. It provides a torsionally soft connection between an internal combustion engine and a driven machine. The highly flexible torque transmission characteristic is achieved by a discshaped rubber element that is subjected to a torsional load and enables both, the absorption of high torsional vibrations and the compensation of major misalignments. For an optimum adaptation to the conditions of application three different kinds of vulcanisates are available: For application temperatures up to 0 C a natural/synthetic caoutchouc mixture as a standard version, up to 00 C a more heat resistant mixture and for higher application temperatures up to 30 C a silicone mixture. The inside diameter of the rubber disc element is vulcanized directly to a taper hub or bolton sleeve. The toothed profile on the circumference of the element provides in service a virtually backlashfree, positive plugin connection to the coupling flange. The flywheel coupling series covers a torque range from Nm (corresponding to approx. 500 kw at 000 rpm). Element versions of different torsional stiffnesses are available for optimizing the torsional vibration range. The flange connection dimensions of couplings comply predominantly with the SAE J 0 and DIN standards. Other flange dimensions or overall lengths can be provided on request. Shafttoshaft connections when required can be met by shaft couplings which consist of flywheel couplings of the standard design equipped with a second hub. Type approvals by a number of leading classification societies are available. If required, couplings complete with fail safe devices can also be supplied. couplings comply to explosion protection according to ATEX 95. They are certified according to the directive 94/9/EC and may be used in hazardous locations (categories M, + 3). The most important attributes and advantages of couplings AC_Pros_e_03 3
4 Types type ACT with taper bush The flywheel coupling type ACT...F is equipped with a taper bush for shaft mounting. The rubber disc element is vulcanized directly to the taper hub. After completion of the assembly, a shrinkfitlike connection, free from backlash is established between the coupling hub with rubber disc element and the shaft. Thanks to the use of coercially available taper bushes with a number of different bore dimensions, the need for finishing the bore and keyway of the coupling hub is omitted for the coupling type ACT. The torque, which can be transmitted, depends on the particular taper bush. Advantage: Ease of assembly and disassembly with no need for special tools! Taper bush Flange Taper hub with rubber element type AC...F with bolted hub The flywheel coupling type AC...F has the rubber disc element vulcanized to a bolton sleeve which in turn is bolted to a hub or similar component. Advantage: Depending on the arrangement of the rubber disc element, two different mounting lengths can be achieved using one and the same coupling hub. Flange Element with bolton sleeve 4 AC_Pros_e_033
5 type AC...FK for radial element change Type AC...FK permits changing the detached element without having to move the coupled machines. Where the flywheel or flywheel housing protrudes excessively from the element, a spacer ring corresponding to oversize X is required for radial removal. Spacer ring flywheel coupling type AC...D F with elements operating in tandem shaft coupling type ACT...T shaft coupling type AC...D TK with elements operating in tandem flywheel coupling type AC...DS with fail safe device, to be mounted between an internal combustion engine and a marine gearbox. flywheel coupling with splined clamping hub, to be mounted between an internal combustion engine and a pump drive. flywheel coupling type AC VSK... with integral bearing, to be mounted to internal combustion engines as an Ujoint coupling in conjunction with a cardan shaft. Extra folder is available.. AC_Pros_e_03 5
6 Technical Datails Standard version with element Natural/synthetic caoutchouc mixture coupling size AC,5 AC,3 AC, /,7 ) AC 3 AC 4 / 4. AC 4.9 AC 5 / 5. AC /. AC,5 AC 7 AC 7,5 AC AC 9 AC 0. AC AC,7 AC,9 AC AC 3 Element version Nominal torque T KN Maximum torque T KW Fatique torque* ) T KW (0Hz) Dynamic torsional stiffness C T dyn Flange size Max. speed SAE J 0 n max Nm Nm Nm knm/rad rpm Element versions: = 55 Shore A; = 5 Shore A; = 75 Shore A; = 5 Shore A Due to the physical characteristics of the rubber materials the measurable rubber hardness is subject to a dispersion, which is defined according to DIN with ± 5 Shore A. Because of inhouse manufacturing this dispersion of the shore hardness can be minimized. * ) Continuous fatigue torque under reversing stresses ± T KW at = 0 Hz, for other frequencies f x apply T KW ) Torsional stiffness for AC.7 on request similar to DIN on request 500 AC_Pros_e_033
7 Technische Daten Standardausführung mit Elementen NaturSynthesekautschukmischung coupling size AC D AC 9D AC 0.D AC D AC,7 D AC D AC 3D Element version Nominal torque T KN Maximum torque T KW (0Hz) Fatique torque*) T KW (0Hz) Dynamic torsional stiffness Flange size Max. speed n max C T dyn SAE J 0 Nm Nm Nm knm/rad rpm similar to DIN on request 300 Element versions: = 55 Shore A; = 5 Shore A; = 75 Shore A; = 5 Shore A Due to the physical characteristics of the rubber materials the measurable rubber hardness is subject to a dispersion, which is can be minimized. * ) Continuous fatigue torque under reversing stresse ± T KW at f = 0 Hz, for other frequencies f x apply T KW Resonance facto V R rand relative damping Ψ Element version V R Ψ Technical note The technical data applies only to the complete coupling or the corresponding coupling elements. It is the customer s/ user s responsibility to ensure there are no inadmissible loads acting on all the components. Especially existing connections, like bolt connections, have to be checked regarding the transmittable torque, if necessary other measures, e.g. additional reinforcement by pins, may be required. It is the customer s/user s responsibility to make sure the dimensioning of the shaft and keyed or other connection, e.g. shrinking or clamping connection, is correct. REICHKUPPLGEN have an extensive prograe of couplings and coupling systems to cover nearly every drive configuration. Furthermore customized solutions can be developed and be manufactured also in small series or as prototypes. Calculation prograes are available for coupling selection and sizing. Please challenge us! AC_Pros_e_03 7
8 Technical details Silicone version coupling size Element version Nominal torque T KN Maximum torque T Kmax Maximum torque T Kmax Fatique torque*) T KW (0Hz) Dynamic torsional stiffness C T dyn Nm Nm Nm Nm 0.0 T KN knm/rad 0.5 T KN knm/rad 0.50 T KN knm/rad 0.75 T KN knm/rad.00 T KN knm/rad AC,3 WX AC, WX AC 3 WX AC 4 / 4. WX AC 4,9 WX AC 5 / 5. WX AC /. WX AC,5 WX AC 7 WX AC 7,5 WX AC WX AC D WX AC 9 WX AC 9D WX AC 0. WX AC 0.D WX AC WX AC D WX AC WX AC D WX Element version: WX = 0 ± 5 Shore A * ) Continuous fatigue torque under reversing stresses ± T KW at f = 0 Hz, for other frequencies f x applyt T KW Additional information for selection of couplings with silicone elements:..0 T AN T KN T AN = nominal torque of the drive T Kmax is the highest permissible maximum torque of the application taking for example into account starting, stopping and running through the resonance speed. T Kmax is the highest permissible peak torque, which can occur with a limited number of application related conditions, e.g. shortcircuit, synchronization failure, emergency stop. Resonancw factor V R and relative damping Ψ Element version V R Ψ WX AC_Pros_e_033
9 Materials Coupling flanges: Coupling size AC,3 AC 0. D high grade aluminium casting Coupling size AC AC3 D of spheroidal cast iron grade GGG 50 for ambient temperatures from 40 C up to +0 C for ambient temperatures from 5 C up to +00 C Type ACT: Taper hub and taper bush of grey cast iron grade GG 5 (min. yield strength 30 MPa) Selection of the proper coupling size The coupling size to be used in conjunction with internal combustion engines is dimensioned and selected with a view to torsional vibration. For a preliminary selection use the engine torque TAN, a general safety factor of S =.3.5 should be applied for couplings with flexible rubber disc elements of natural/synthetic caoutchouc. The following requirements should be satisfied for a proper selection of the coupling size:. The nominal torque capacity T KN of the coupling shall be at least equal to the max. drive torque T AN while taking the service factors into account T KN T AN S t Calculate the driving torque T AN Given a driving powe P AN and a coupling speed n AN, the driving torque is calculated as follows: The temperature factor St allows for a decreasing load carrying capability of the coupling at elevated ambient temperatures. In this connection S t = S t is valid for S t = S t. The maximum torque capacity T Kmax of the coupling shall be at least equal to the highest torque T max encountered in operation while taking the temperature factor S t into account 3. The permissible continuous fatigue torque under reversing stresses T KW of the coupling should be at least equal to the highest fatigue torque under reversing stresses T W encountered throughout the operating speed range while taking the temperature and frequency into account. The frequency factor S f allows for the frequency dependence of the permissible continuous vibratory torque under reversing stresses T KW (0 Hz) when operating with a different frequency f x T AN [Nm] = 9550 C S t.5.4. on request S t T Kmax T Kmax S t T kw (0 Hz) T W S t S f S f = f x 0 P AN [kw] n AN [min ] The dimensioning of the coupling should be checked for permissible coupling loads by means of a torsional vibration analysis which will be conducted by us on request. When using couplings in drives with great torque transmission variations, an additional safety factor should be applied for torque transmission to the driven machine. Lists specifying couplings assigned to different ratings and torsional vibration conditions are available for all coon internal combustion engines operating at constant speeds to facilitate your selection of an operationally safe coupling. The coupling can be equipped with an additional balancing mass on the primary or secondary side, if this is required due to the torsional vibration conditions or for control reasons. Further information for the torsional vibration calculation and for use of the rubber disc coupling are available on request. AC_Pros_e_03 9
10 flywheel couplings Type ACT...F with taper bush Flange connecting dimensions to SAE J 0 d and mounting dimensions to DIN Coupling size ACT,5* ).F ACT,3.* ) F ACT,.* ).F ACT,7.* ).F ACT 3.* ).F ACT 4.* ).F ACT 4,9.* ).F ACT 5.* ).F Fig SAE size Flange connections to SAE J 0 D D D Z Taper bushing No D A D Mounting instruction: If engine and generator connecting dimensions comply with DIN,the distance dimension L X must beobserved during assembly. The coupling dimension L F must be within the tolerance. Available taper bushes No. Metric bores with keyway acc. to DIN 5/ Taper bushes with imperial size bores can also be supplied. Ordering example: Coupling designation ACT4.. F coupling size Elementausführung gemäß Technische Daten Size of flange connection to SAE J 0 Nominal size of taper bush L L L L L 5 L F 3± 3± 3± 3± 5± 43±3 43±3 43±3 0 4±4 4±4 4±4 40±4 40±4 40±4 5±7 5±7 ± +/ 7+/ DIN T L x J outside kgm J inside kgm ±7 9± ±5 7± ACT.* ).F ± ± ± ACT,5.* ).F ± ACT 7.* ).F ACT 7,5.* ).F ACT.* ).F ACT 9.* ).F * ) For the element versions, see Technical details ±0 7±0 7±0 0±5 0±5 0±7 0±7 0±4 0± Total weight kg AC_Pros_e_033
11 Type AC...F with bolted hub Flange connecting dimensions to SAE J 0 d Coupling size Flange connection to SAE J 0 D D D 3 D A D D 4 * ) For the element versions, see Technical details ) Mounting lengths for flange connecting dimensions to SAE J 0 and/or DIN The option of mounting the coupling element internally or externally provides two different overall lengths with one and the same coupling hub. Other flange and length dimensions on request. L L L 3 L 4 L 5 L L 7 L F short L F long J outside kgm J inside kgm Total weight kg Fig. SAE Z size min. max AC,3.* ).F AC,.* ).F ) AC,7.* ).F AC 3.* ).F ) ) AC 4.* ).F ) ) AC 4,9.* ).F AC 5.* ).F ) ) ) AC.* ).F AC,5.* ).F ) ) AC 7.* ).F AC 7,5.* ).F AC.* ).F AC 9.* ).F AC 0..* ).F AC.* ).F AC,7* ).F AC,9* ).F unbored. precentered AC_Pros_e_03
12 Type AC...FK with bolted hub for radial element change Flange connecting dimensions to SAE J 0 d and mounting dimensions to DIN Coupling size AC,.* ).FK AC,7.* ).FK AC 3.* ).FK AC 4,.* ).FK AC 4,9.* ).FK AC 5,.* ).FK Fig. SAE size Flange connection to SAE J 0 D D D Z D A D min. max. unbored. precentered D L L L L L L 0 0 L F J outside kgm J inside kgm AC,.* ).FK AC,5.* ).FK AC 7.* ).FK AC 7,5.* ).FK AC.* ).FK AC 9.* ).FK AC 0..* ). FK AC.* ).FK AC,7* ).FK AC.* ).FK Total weight kg * ) For the element versions, see Technical details Other flange and length dimensions on request Ordering example: Coupling designation Coupling size Element version acc. to Technical details Version for the element change Size of flange connection to SAE J 0 (AC: D ) Mounting length L F in AC 9. FK.. 37 AC_Pros_e_033
13 Type ACT...T Type AC...TK (for radial element change) Coupling size Taper bushing Taper bushing Nr. D max. Nr. D max. D 3 D 4 D 5 D A L L L 3 L 4 L F L W L W J kgm J kgm Total weight kg ACT,3...T ACT,...T ACT 3...T AC 3...TK ACT 4...T AC 4...TK ACT 4,9...T AC 4,9...TK ACT 5...T AC 5...TK ACT...T AC...TK ACT,5...T AC,5...TK ACT 7...T AC 7...TK Type AC...TK (for radial element change) Type AC...D TK (for radial element change) Coupling size D max. D max. D 3 D 4 D 5 D A L L L 3 L 4 L F L W J kgm J kgm Total weight kg AC 7,,, TK AC... TK AC D... TK AC 9... TK AC 9D... TK AC TK AC... TK AC... TK Other flange and length dimensions on request / For the element versions, see Technical details AC_Pros_e_03 3
14 Flanschkupplungen with elements operating in tandem Type AC...D.F with bolted hub and flange connecting dimensions to SAE J 0 d Coupling size Fig. SAE size Flange connection to SAE J 0 D D D Z D A min. D max. D 4 L L L 3 L F J outside kgm J inside kgm Total weight kg AC D.* ).F AC 9D.* ).F AC 0.D.* ) F AC D.* ).F AC,7D.* ).F * ) For the element versions, see Technical details Other flange and length dimensions on request Ordering example: Coupling designation Coupling size Element version acc. to Technical details Size of flange connection to SAE J 0 Mounting length LF in AC 9D.. F AC_Pros_e_033
15 with elements operating in tandem Type AC...D.F with bolted hub and flange connecting dimensions to SAE J 0 d Coupling size Fig. SAE size Flange connection to SAE J 0 D D D Z D A min. D max. D 4 L L L 3 L F J outside kgm J inside kgm Total weight kg AC D.* ).FK AC 9D.* ).FK AC 0.D.* ).FK AC D.* ).FK AC,7D.* ).FK AC D.* ).FK * ) For the element versions, see Technical details Other flange and length dimensions on request Ordering example: Coupling designation coupling size Element version acc. to Technical details Version for the element change Size of flange connection to SAE J 0 (ACD: D ) Mounting length L F in AC 0D. FK AC_Pros_e_03 5
16 Mounting instructions Type ACT...F with taper bushing How to mount the taper bush. The outer taper of the taper bush and the bore with the inner taper of the element hub shall show bright metal and must be free of grease prior to mounting. Preservatives must be removed completely.. Insert the taper bush into the element hub and line up all connecting bores. Make sure that half threaded holes coincide with half plain holes (Fig. ). 3. Screw in lightly greased or oiled assembly screws. Do not tighten the screws yet (Fig. ). No No / Slide the element hub with inserted taper bush onto the cleaned shaft with keyway and put it into the mounting position L X (Fig. 3). 5. Tighten the screws uniformly up to the tightening torque M A specified in table using a torque wrench.. The screws can be retightened again by tapping against the taper bush with a haer using an intermediate plate. Repeat, if necessary. Tightening torques for mounting the taper bush Table Coupling size ACT,5 ACT,3 ACT, ACT,7 ACT 3 ACT 4 ACT 4,9 ACT 5 ACT Taper bush No ACT,5 ACT 7 ACT 7, ACT ACT 9 C screw size * ) 3 / x 7 / x / x 5 5 / x 3 / x 3 5 / x 45 3 / 4 x 50 7 / 57 Tightening torque M A Nm Width across flats SW * ) No. 0/0/57/3030 set screw No. 3535/4040/4535/4545/5040 cap screw 5040 How to remove the element hub with taper bush. Loosen and remove all screws. Depending on the taper bush size, screw either or greased screws into the half pullingoff thread(s) of the taper bush (Fig. 4).. Tighten the screws uniformly until the taper bush is loose in the element hub. 3. As soon as the taper bush is loose, the element hub can be pulled off the shaft together with the taper bush. AC_Pros_e_033
17 Tightening torques All boits and screws must be tightened to the specified torques during assembly in order to ensure a reliable torque transmission. Prior to putting the machinery into operation, all bolts and screws of the coupling must be checked for proper fit and tightness. The indicated torques apply to an total friction factor of μ = 0.4. Table Tightening torques for the bolted flange connection to the engine flywheel (grade.) SAE flywheel flange ½ 7½ 0 ½ 4 Metric bolts M M0 M M M0 Tightening torque M A [Nm] Imperial size bolts 5 / 3 / / 3 5 / 3 / 4 0 Tightening torque M A [Nm] Note: The aluminium flanges of the coupling sizes AC,3 AC 0D have to be mounted only with washers. We recoend to use washers as big as possible, but minimum dimensions according to DIN 433. If needed bolts of grade 0.9 with suitable washers and the corresponding tightening torque can be used, please consult us. Table 3 Tightening torques for the bolted hub connection Types AC...F and AC...F.K (grade.) Coupling size AC,3 AC, AC 3 AC 4 / 4. AC 4,9 AC 5 / 5. AC /. AC,5 AC 7/AC 7,5 AC /AC D AC 9 /AC 9D AC 0. /AC 0.D AC /ACD AC,7/AC,7D AC,9 /AC AC D M M M M M M0 M0 M M (0.9) Tightening torque M A3 [Nm] Shaft couplings Coupling size AC,3 AC, AC3 AC 4 / 4. AC 4,9 AC 5 / 5. AC /. AC,5 AC 7/AC 7,5 For the tightening torques MA see the mounting instruction for taper bushes table. For the tightening torques MA3 see table 3. AC /AC D AC 9 /AC 9D AC 0. / AC 0.D AC / ACD AC,7 / AC,7D AC,9 / AC M M0 M0 M M M0 M0 M Tightening torque M A [Nm] AC_Pros_e_03 7
18 Alignment Careful alignment of the coupling is an essential requirement for detached, nonflanged machinery in order to ensure proper functioning of the coupling and to avoid premature wear of the rubber element. Flywheel couplings shall be aligned from the shaftside coupling half to either one of the machined surfaces of the engine flywheel or engine housing. Where shaft couplings are used, the angular and radial displacements between the two coupling halves are determined by applying the usual dial indicator method. The alignment requirements of the other application components have to be considered additionally. flywheel coupling Type AC...F flywheel coupling Type ACT...F shaft coupling Permissible shaft displacement The permissibility of major shaft displacements depends on a number of factors such as coupling size, shore hardness of the rubber element, operating speed and torque load of the coupling. The following reference values refer to an operating speed of 500 rpm. Precise alignment prevents premature wear of the rubber element. Coupling size Angular displacement Radial displacement Axial displacement,5,3, , ,5 7 7,5 D 9 9D,7/,7D 0 0D /,9 D Permissible radial displacement Kr [] Permissible angular displacement α [ ] Permissible axial displacement Ka []*) ±.5 ±3 ±4 ±7 + / ±7 ±5 ±7 ±4 ± ±7 ±5 ±4 ±3 ±4 ±3 Larger displacements of short duration, as may occur when starting and stopping the diesel engine, are permissible. These maximum displacements must not occur simultaneous. * ) At types AC...FK and AC...TK the axial fitting length LF of the coupling should always offer a plus tolerance within the possible tolerance range in order to reach max. axial movability of the dismantled coupling element. D Safety precautions lt is the customer s and user s responsibility to observe the national and international safety rules and laws. Proper safety devices must be provided for the coupling to prevent accidental contact. Check all bolted connections for the correct tightening torque and fit after a short running period preferably after a test run. AC_Pros_e_033
19 Requested Data Coupling Selection / Torsional Vibration Calculation acc. to the masssystem (DIN 740 part ) The dimensioning of the coupling should be supported by a torsional vibration analysis particularly with a view to the acting fatigue torque under reversing stresses. We are able to conduct this analysis according to the or nmass system when all required technical details are given. ENGINESIDE:. Engine type. Engine power 3. Engine speed 4. Inline / Vengine 5. Number of cylinder. Total displacement 7. Moments of inertia (engine + flywheel). Harmonic components of tangential effort 9. Necessary rules needed for the selection of the coupling 0. Drawing of the housing/flywheel with marking of their positions Engine type n [rpm] R / V angle z V H [ccm] J [kgm ] DRIVENSIDE:. Kind of application (alternator, pump, compressor, etc.). Type 3. Moments of inertia 4. Shaft diameter 5. Shaft length. Drawing of the driven machine J [kgm ] d [] l [] If the driven machine shall be flanged to the engine using an intermediate housing we kindly ask you to advise us the dimensions and details indicated on the following diagram enabling us to optimize the mounting positon of the coupling. Type of the engine Intermediate housing if any Type of driven machine number Anzahl *SAE size or specified dimension External spline The coupling should always be properly ventilated in the intermediate housing (e.g. through ventilation holes in the housing). AC_Pros_e_03 9
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