Power Transmission Solutions. isync Polyurethane Belts

Transcription

1 Power Transmission Solutions isync Polyurethane Belts

2 ELATECH isync high performance timing belts

3 ELATECH isync In the spirit of continuos innovation, in order to answer to the increased need of industry in power transmission, ELATECH has developed the isync range of belts. isync belts are made with special polyurethane compound and high resistance steel tension cords which are processed with a unique and highly sophisticated technology to get a superior polyurethane belt. isync belts offer optimal performances on all type of industrial applications. isync belts are able to transmit up to 30% more than conventional T, AT type of belts in the same space or same power with a more compact drive. Power (%) Polyurethane belt A - AT Belt Type Power increase isync T - AT isync T - AT Features High power transmission capabilities Maintenance free Superior stability Clean power transmission with no dust dispersion No contamination of object in contact Very high chemical resistance and particularly to oils, greases and gasoline Superior abrasion resistance High quality, thermo-set polyurethane designed specifically for timing belt applications Available with either steel or Kevlar reinforcement Application temperature -30 C - +0 C Typical application fields ELATECH isync belts are suitable for power transmission drives where high precision is needed, cleanliness is critical and in difficult environment (presence of chemicals). Plotters Office automation Medical technology Pacaging machines Swimming pool cleaning robots Baning machines Coin dispenser Vending machines Optical instruments Cameras Machine tools Robot arms Home appliances Vacuum systems Food processing machines Textile machines Gardening equipment and machines Available profile range ELATECH isync belts are available in a standard range in the following profile range: T2,5, T5, T, AT5, AT As special the following profile can be manufactured on request MXL, L, H, HTD5M, DD double sided executions. Tension cords ELATECH isync timing belts are manufactured with high tensile strength steel cords as standard. All technical data shown in the catalogue are valid for standard cords. Belt with special cords have different mechanical and chemical properties. Special type of tension member such as stainless steel, HFE high flexibility or aramid fiber (Kevlar ) are available on request for special applications. Aramid (Kevlar ) tension cords are used where non magnetic drives are requested. Stainless steel used where high corrosion resistance is required. Fiberglass and polyester used where high flexibility and water restistance are required. Applications with special bacing and cleats are specifically designed for special heavy duty conveying drives. 44

4 Standard belt sies T2,5 T5 T5 T T , , , , T ELATECH isync Order example ELATECH isync Timing Belt U 420 T5 / 6 45

5 AT5 AT Order example ELATECH isync Timing Belt U 450 AT5 / 6 46

6 DT5 DT XL L Profile Belt width DT DT [Inches] 30 52, , , , ,4 8, , ,8 9, ,, ,2, ,2, , ,6, ,6, , , , , 2, , ,4 3, , , 5, ,2 5, , ,6 6, , , ,4 8, , , , ,5 2,2 558, , , ,2 25, , , , , , ,8 34, , , ,4 38, , ,6 4, , , ,5 5, ,6 56, , ,8 67 XL L [Inches] 33 34,3 2, , 6, ,2 7, ,3 8, , ,5 22, , ,7 25, , ,9 28, ,2 32, ,3 34, ,5 36, ,5 37, , ,6 42, , , , , 60 Profile [inch] [inch] Belt width 6,4-7,9 9,5-2,7 0,25-0,3 0,37-0,50 2,7-9,0 25,4-38, 0,50-0,75,00 -,50 ELATECH isync 47

7 ELATECH isync high performance endless timing belt technical data T2,5 isync Belt characteristics Truly endless polyurethane timing belt with steel tension cords according to DIN 772 T Metric pitch 2,5 mm Ideal for drives where high belt flexibility is requested Allows to use small diameter pulleys Transmissible power up to 5 W Rpm up to.000 [/min] Width tolerance: Thicness tolerance: ±0,3 ±0,2 Belt width Weight [g/m] Other widths are available on request Tooth shear strength 0 0,47 0, ,29 0, ,23 0,8 20 0,45 0, ,28 0, ,22 0, ,44 0, ,28 0, ,22 0, ,43 0, ,28 0, ,22 0, ,42 0, ,27 0, ,2 0, ,4 0, ,27 0, ,2, ,38 0, ,27 0, ,20, ,36 0, ,26 0, ,9, ,35 0, ,26 0, ,9, ,34 0, ,26 0, ,9, ,33 0, ,25 0, ,8, ,32 0, ,25 0, ,8, ,3 0, ,24 0, ,7, ,30 0, ,24 0, ,7,6 00 0,30 0, ,24 0, ,7, ,29 0, ,23 0, ,6,725 The total power P and the total torque M transmitted by the belt, are calculated with the following formulas: P [W] = Pspe e b / 00 M [Nm] = Mspe e b / 0 ( ) Z t g Ze = arccos 80 2 π A P = power in W M = torque in Nm Pspe = specific power Mspe = specific torque e = number of in mesh of the small pulley emax = 2 = number of of the small pulley b = belt width in cm A = centre distance t = pitch Flexibility Minimum number of and minimum diameter Drive without reverse bending Driver pulley min = Idler (flat) running on belt d min = 5 mm Drive with reverse bending and double sided belt Driver pulley min = 8 Idler (flat) running on belt bac d min = 5 mm 48

8 T5 isync T5 Belt characteristic Truly endless polyurethane timing belt with steel tension cords according to DIN 772 T Metric pitch 5 mm Ideal for drives where high belt flexibility is requested Allows to use small diameter pulleys Rpm up to.000 [/min] 5.20 Width tolerance: Thicness tolerance: ±0,5 ±0,5 Belt width Weight [g/m] Other widths are available on request Tooth shear strength Minimum number of and minimum diameter Drive without reverse bending Driver pulley min = Idler (flat) running on belt d min = 30 mm 0 2,523 0, ,607 2, ,248 4, ,458 0,05 300,580 2,5 3600,229 4, ,403 0, 400,555 2, ,209 4, ,354 0,48 440,545 2, ,9 4, ,32 0,94 500,532 2, ,49 5,44 0 2,276 0, ,5 2, , 5, ,35 0, ,489 2, ,078 6, ,032 0, ,470 2, ,046 6,57 400,95 0,87 900,45 2, ,07 6, ,884 0, ,433 3, ,99 7, ,829, ,400 3, ,966 7, ,78, ,37 3, ,943 7, ,738, ,342 3, ,920 8,9 900,70, ,37 3, ,900 8,480 00,667, ,306 3, ,880 8,758 0,635, ,292 4, ,862 9,027 Flexibility The total power P and the total torque M transmitted by the belt, are calculated with the following formulas: P [W] = Pspe e b / 00 M [Nm] = Mspe e b / 0 ( ) Z t g Ze = arccos 80 2 π A P = power in W M = torque in Nm Pspe = specific power Mspe = specific torque e = number of in mesh of the small pulley emax = 2 = number of of the small pulley b = belt width in cm A = centre distance t = pitch ELATECH isync Drive with reverse bending and double sided belt Driver pulley min = 5 Idler (flat) running on belt bac d min = 30 mm 49

9 T isync T Belt characteristics Truly endless polyurethane timing belt with steel tension cords according to DIN 772 T Metric pitch mm Ideal for drives where high belt flexibility is requested Allows to use small diameter pulleys Rpm up to.000 [/min] Width tolerance: Thicness tolerance: ±0,5 ±0,2 Belt width Weight [g/m] Other widths are available on request Tooth shear strength 0 8,244 0, ,808 6, ,460 2, ,009 0, ,708 6, ,385 2, ,805 0, ,64 6, ,32 3, ,627 0, ,577 6, ,245 3, ,472 0, ,526 7, ,088 4, ,339 0, ,444 7, ,946 5, ,804, ,366 7, ,87 6, ,4 2, ,292 8, ,70 6, ,5 2, ,222 8, ,593 7, ,857 3, ,57 8, ,492 8, ,648 3, ,033 9, ,398 8, ,467 4, ,920 9, ,3 9, ,306 4, ,85, ,228 9, ,63 4, ,78, ,50 20, ,034 5, ,680, ,077 20,66 0 4,96 5, ,626, ,007 2,05 The total power P and the total torque M transmitted by the belt, are calculated with the following formulas: P [W] = Pspe e b / 00 M [Nm] = Mspe e b / 0 ( ) Z t g Ze = arccos 80 2 π A P = power in W M = torque in Nm Pspe = specific power Mspe = specific torque e = number of in mesh of the small pulley emax = 2 = number of of the small pulley b = belt width in cm A = centre distance t = pitch Flexibility Minimum number of and minimum diameter Drive without reverse bending Driver pulley min = 2 Idler (flat) running on belt d min = 60 mm Drive with reverse bending and double sided belt Driver pulley min = 20 Idler (flat) running on belt bac d min = 60 mm 50

10 AT5 isync AT Belt characteristics Truly endless polyurethane timing belt with steel tension cords. Metric pitch 5 mm Tooth profile and dimension are optimised to guarantee uniform load distribution and mini mum deformation under load High resistance and low stretch steel cords to guarantee high stability and low elongation Reduced polygonal effect with reduced drive vibration and noise Rpm up to.000 [/min] Width tolerance: Thicness tolerance: ±0,5 ±0,5 Belt width Weight [g/m] Other widths are available on request Tooth shear strength 0 3,83 0, ,668 3, ,993 7, ,758 0, ,620 3, ,954 7, ,708 0, ,574 3, ,97 7, ,663 0, ,557 3, ,88 7, ,623 0, ,53 3, ,799 8, ,586 0, ,49 4, ,725 9, ,448 0, ,452 4, ,658 9, ,343, ,46 4, ,596, ,235, ,38 4, ,539, ,37, ,348 4, ,485, ,050, ,285 5, ,436, ,972 2, ,229 5, ,389, ,900 2, ,75 5, ,346, ,834 2, ,25 6, ,304 2, ,775 2, ,6 6, ,264 2, ,79 3, ,079 6,53 000,228 2,854 Flexibility Minimum number of and minimum diameter Drive without reverse bending Driver pulley min = 5 Idler (flat) running on belt d min = 30 mm The total power P and the total torque M transmitted by the belt, are calculated with the following formulas: P [W] = Pspe e b / 00 M [Nm] = Mspe e b / 0 ( ) Z t Ze = g arccos 80 2 π A P = power in W M = torque in Nm Pspe = specific power Mspe = specific torque e = number of in mesh of the small pulley emax = 2 = number of of the small pulley b = belt width in cm A = centre distance t = pitch ELATECH isync Drive with reverse bending and double sided belt Driver pulley min = 25 Idler (flat) running on belt bac d min = 60 mm 5

11 AT isync T Belt characteristics Truly endless polyurethane timing belt with steel tension cords. Metric pitch mm Tooth profile and dimension are optimised to guarantee uniform load distribution and mini mum deformation under load High resistance and low stretch steel cords to guarantee high stability and low elongation Reduced polygonal effect with reduced drive vibration and noise Rpm up to.000 [/min] Width tolerance: Thicness tolerance: ±0,5 ±0,2 Belt width Weight [g/m] Other widths are available on request Tooth shear strength 0 5,903 0, ,74 2, ,09 24, ,670 0, ,945 3, ,838 25, ,452 0, ,73 4, ,664 26, ,246 0, ,649 4, ,500 27, ,053, ,529 4, ,20 28, ,870, ,340 5, ,777 30, ,3 2, ,60 6, ,464 3, ,483 4, ,990 6, ,79 32, ,927 5, ,828 7, ,96 33, ,439 6, ,672 8, ,670 34, ,008 7, ,380 9, ,44 34, ,626 8, ,3 20, ,227 35, ,282 9, ,866 2, ,023 35, ,969, ,632 22, ,832 36,3 00,683, ,544 22, ,65 36,322 0,48 2, ,46 23, ,479 36,429 The total power P and the total torque M transmitted by the belt, are calculated with the following formulas: P [W] = Pspe e b / 00 M [Nm] = Mspe e b / 0 ( ) Z t g Ze = arccos 80 2 π A P = power in W M = torque in Nm Pspe = specific power Mspe = specific torque e = number of in mesh of the small pulley emax = 2 = number of of the small pulley b = belt width in cm A = centre distance t = pitch Flexibility Minimum number of and minimum diameter Drive without reverse bending Driver pulley min = 5 Idler (flat) running on belt d min = 50 mm Drive with reverse bending and double sided belt Driver pulley min = 25 Idler (flat) running on belt bac d min = 20 mm 52

12 Drive calculation α t β d α d2 dw Z da ZB, LR da dw Zg A Definitions b (cm) Belt width L R (mm) Belt lenght R - of the belt B (mm) Pulley width A (mm) Center distance A eff (mm) Effective center distance d (mm) Pulley bore diameter d a (mm) Pulley outside diameter d a (mm) Small pulley outside diameter d ag (mm) Large pulley outside diameter d w (mm) Pulley pitch diameter d w (mm) Small pulley pitch circle diameter d wg (mm) Large pulley pitch circle diameter F Wsta (N) Static Shafts load F TV (N) Pretension force per belt side F Tul (N) Allowable tensile load F U (N) Peripheral force M (Nm) Torque P (W) Power t ab (s) Acceleration time t av (s) Deceleration time v (m/s) Peripheral speed e - N. of in mesh - of the small pulley g - of the large pulley i - Drive ratio ( n : n 2 ) ρ (g/dm 3 ) Specific weight J (gm 2 ) Moment of inertia t (mm) Pitch n (min - ) Rpm n (min - ) Rpm of driver pulley ω (s - ) Angular speed β ( ) Wrap angle Calculation formula Power Peripheral force Torque M n P = 9550 Fu dw n P = P Fu = n d w 2000 M Fu = d w 3 FU dw M = P M = n ELATECH isync Angular speed π n ω = 30 pheripheral speed d n v = 90 W Acceleration torque M ab J n = 9,55 t ab Moment of inertia J= 98,2 5 B ρ ( d d ) 4 4 a 90 v n= d w 53

13 The necessary data for drive calculation are: Power to be transmitted P [W] Driver n Motor starting torque M ab [Nm] Required center distance A Maximum driver pulley diameter d w Calculate in mesh β e = 360 with β [ ] = wrap angle ( ) t g β = 2 arccos 2 π A Safety factors Belt selection is made according to a constant woring load. For start up torque and in case of pea loads and vibrations must be considered a safety factor c. Transmission with steady load c =,0 Determine belt width P 00 c b = P e 0 spe b = 0 M c 0 e Transmission with pea or fluctuating loads: Light c =,4 Medium c =,7 Heavy c = 2,0 For speed up driver factor c 2 must be considered: i = from 0,66 to c 2 =, i = from 0,40 to 0,66 c 2 =,2 i < 0,40 c 2 =,3 The resulting total safety factor is: Verifiy allowable tensile load The allowable tensile load of the belt must be highter than the total corrected peripheral force. F Tul > c 0 F U Calculate shaft load F F Wsta Wsta = 2 F = 2 F Tv Tv cos β with ( for i = ) 2000 M Fu = d w c 0 = c c 2 Select type of belt For the initial drive selection, use the selection graph. For initial pulley choice, it is recommended to use the driver pulley with maximum diameter allowable in the application. Calculate drive ratio Calculate belt lenght Belt lenght for drive with ratio i # L R t 2 ( + ) g and more precisely: L + 2A + 4A β t 2A sin + g n i = n driver driven 2 ( ) t Belt lenght for drive with ratio i = g π β + 80 ( ) R = g Determine installation tension A drive is correctly tensioned when the belt slac side is tensioned in all woring conditions. It is also important to use the minimum necessary tension to minimie shaft loads. Belt tension is dependent also on belt LR and its number of ZR. According to belt number of, following tension is suggested: 2 shafts drive Z R < 75 F TV = /3 F U 75 < ZR < 50 F TV = /2 F U ZR > 50 F TV = 2/3 F U More than 2 shafts drive F TV > F U In order to ensure the correct drive installation tension, it is recommended to use the special belt tension meter available from ELATECH. L = 2 A + π d = 2 A + t R w 54

14 Calculation example - Power to be transmitted 5 [W] - Driver n 500 [/min] - Driven n [/min] - Motor start up torque M ab 200 [Nm] - Required center distance A Max allowable driver pulley diameter d w 30 - Safety factor c,4 β dw d α Z da α ZB, LR A da t dw d2 Zg Calculate drive ratio n n = 2 Select belt type and pitch From selection graph and the corrected power of 2 W, a AT pitch is chosen. Calculate pulley diameter From the maximum allowable pulleys diameter, the drive ratio and the type of belt selected, the number of of the driver and driven pulley is calculated. The maximum allowable diameter is chosen to minimie belt width. = 40 2 = 40 Calculate belt L = 2 A + π d = 2 A + t R 30 π = = 40,84 - select = 40 with d w = 27,32 mm L R = = w 200 mm Calculate belt width 00 5,4 b = = 2,92 cm = 29,2 mm ,968 A belt width of 32 mm is selected. The belt width is verified according to the pea torque (starting torque) for n = 0 with 200 Nm as start up torque b = = 4,37 cm = 43,7 mm ,529 The next belt width 50 mm is chosen. Determine installation tension according to belt number of 2000 M ab F U = = 34 N d w 200 Z R = = 20 The installation tension per belt side F TV is therefore: F TV = F U = 570 N with R = 20 2 Verify flexibility The minimum pulley diameters are respected. Calculate in mesh Being the drive ratio, the pulleys have 20 in mesh. e = 20 Selection graph P. [Kw] Selected belt ELATECH isync U200 AT / 50 AT T AT5 T5 T2,5 ELATECH isync n [min-] 55

15 Belt installation Drive installation When installing belt on pulleys, it must be checed before tensioning the drive, that belt and pulley grooves correctly match. Belt drive tension Correct belt drive tension and alignement are very important to optimie belt life and minimie noise level. In fact improper tension in the belt drive, affect belt fit in the pulley grooves while correct tension minimies belt pulley interference reducing the noise in the drive. Drive Alignment Pulley misalignment will result in an unequal tension, edge wear and reduction of belt life. Also, misaligned drives are much noisier than correctly aligned drives due to the amount of interference that is created between the belt and the pulley grooves. Proper pulley alignement should be checed with a straight edge or by using a laser alignment tool. Belt width 6 32 over Allowable pulley misalignment [ ] 0,28 0,6 0, Idlers Idlers are often a mean to apply tension to the drive when the centre distance is fixed but also to increase the number of in mesh of the small pulley. A toothed idler on the inside of the belt on the slac side is recommended with respect to a bac side idler. Drives with inside flat idlers are not recommended as noise and abnormal belt wear may occur. Idler location is on the slac side span of the belt drive Diameter for inside toothed idler must be of the diameter of the small pulley in the drive Idler must be mounted on a rigid support Idlers both flat and toothed, should be uncrowned with a minimum arc of contact. Idler should be positioned respecting: 2 (dw + dwg)< A Idlers width should be of pulley width B Bacside idlers, although increase the in mesh on both pulleys in the drive, force counterflexure of the belt thus contributing to premature failure. When such an idler is necessary, it should be at least,25 times the diameter of the small pulley in the drive and it must be located as close as possible to the small pulley in the drive in order to maximise the number of in mesh of the small pulley. Belt handling and storage Proper storage is important in order avoid damaging the belts which may cause premature belt failure. Do not store belts on the floor unless in a protective container to avoid damages which may be accidentally caused by people or machine traffic. Belts should be stored in order to prevent direct sunlight and in a dry and cool environment without presence of chemicals in the atmosphere. Avoid belt storage near windows (to avoid sunlight and moisture), near electric motors or devices which generate oone, near direct airflow of heating/cooling systems. Do not crimp belts while handling or when stored to avoid damage to tensile cords. Belts must not be hang on small pins to avoid bending to a small diameter. Handle belts with care while moving and installing. On installation, never force the belt over the pulley flange. Special belts Special belts with cleats, bacing and with special moulded shape are designed and manufactured to maximie application performance. 56

16 Power Transmission and Conveying Solutions S.I.T. INDEVA, Inc Green Par Circle Charlotte, NC 2827 Tel Fax Head Office SIT S.p.A. Viale A. Volta, 2 ISO Cert. n 024 SIT ANTRIEBSELEMENTE GmbH Rieseler Feld 9 (Gewerbegebiet West) D Brael Tel Cusago (MI) - Italy DINAMICA DISTRIBUCIONES S.A. Ctra. N-II, Km 592,6 E S.Andreu De La Barca (Barcellona) Copyright S.I.T. Indeva, Inc., 202 Fax Tel info@sit-antriebselemente.de Fax dinamica@dinamica.net SIT (Schwei) AG Lenbüel 3 FOGEX CH Sirnach 25, Rue Henri Barbusse Tel F Argenteuil Cedex Fax Tel info@sit-schwei-ag.ch Fax fogex@magic.fr GERHARD BELL Billrothstrasse 32 SIT (SHANGHAI) LTD. A Traun Shanghai Nanhui Industrial par Tel. +43 (0) Yuanhong Road Fax +43 (0) # Building No gerhard.bell@liwest.at PRC Shanghai Tel Fax info@sit-shanghai.com USA5