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WELCOME
TO
SEMINAR
ON
V-BELTS & DRIVES
V-BELTS
RAW EDGE
COGGED BELTS
SPACE SAVER
WEDGE BELTS
POLY-V BELTS
TOP RUBBER
LOAD CARRYING CORDS
BASE RUBBER
RUBBER IMPREGNATED
FABRIC JACKET
INCLUDED ANGLE40º
CROSS–SECTION OF V-BELT
STIFF YET FLEX-CRACK RESISTANT POLYMER POLY FLOCK
(POLY-F) COMPOUND FOR HIGHER LIFE
RUBBERISED POLYESTER-COTTON BLENDED ...
TYPES OF V-BELTS & SECTION
SPACE SAVER WEDGE BELTS
• Wedge Belts drives are extraordinarily compact as they are
capable of handling more power in a given space over Classica...
Option-1 Option-2
Motor Pulley size 660 mm Pitch Dia. with 34
Grooves of E-Section
660 mm Pitch Dia. with 36
Grooves of SP...
The distinct benefits of the Wedge Belt Drive are :-
1. The total Pulley-Belt package cost reduces by
∀• Option –1 : 28% (...
LENGTH STABLE
POLYESTER CORD
MOULDED COG
FABRIC
POWERFLEX RAW EDGE COGGED BELTS
POWERFLEX RAW EDGE COGGED BELTS
POWERFLEX RAW EDGE COGGED BELTS
Features
 Very high flexibility due to moulded cogs.
 Excellent transverse rigidity beca...
PRODUCT DETAILS
CAN BE PRODUCED IN HIGH POWER CONSTRUCTIONS ALSO.
N - SPECIFIES THE NO. OF BELTS PER BAND
BELT CROSS-SECTI...
 ELIMINATE BELT WHIP, BELT TWIST AND BELT
TURN OVER
 IDEAL FOR DRIVES WHERE PULSATING
LOADS ARE PRESENT
 DO NOT REQUIRE...
POLY-V BELTS
POLY-V BELTS
 COMPACT DRIVE
Poly-V belt is highly flexible and hence can be used with smaller pulley
diameter – lighter a...
 SINGLE BELT
Eliminates the necessity to use multiple / matched set
belts.
 HIGHER SPEED
Can be used at higher speed mor...
DO’S & DONT’S OF V-BELTS
Drive Designing
When assessing the power requirements of the drive, do not forget to apply
the ap...
DO’S & DONT’S OF V-BELTS
Belt Guards
Drives should not be completely enclosed by
guards. Open mesh guards which allow norm...
DO’S & DONT’S OF V-BELTS
Pulley grooves
Uneven sheave grooves mismatched belts.
Check grooves for wear. More than 1/32”(0....
Driving
Pulley
Driven
Pulley
SLACK SIDE
TIGHT SIDE
T2e T2e
T1e T1e
TENSIOING OF BELT DRIVES
Belt Tension Indicator
10 20 30 40 50 60 14 12 10 8 6 4 2
mm kg
Deflection in mm Deflection Force in kg
Belt Tension Indic...
As the high performance of V-Belts requires correct tension, we
recommend using the Belt Tension Indicator.
Method of Belt...
Belt
Section
SPZ SPA SPB SPC Z A B C
Small
Pulley
Dia
(mm)
56
to
95
100
to
140
90
to
132
140
to
220
140
to
224
236
to
315
...
EFFECT OF UNDER-BELTING
IN A 5 BELT DRIVE
NO. OF BELTS % UNDER LIFE
BELTING EXPECTANCY
5 NIL 100%
4 20% 45%
3 40% 17%
CAUSES OF V-BELTS FAILURE AND REMEDIES
CAUSES OF V-BELTS FAILURE AND REMEDIES
CAUSES OF V-BELTS FAILURE AND REMEDIES
CAUSES OF V-BELTS FAILURE AND REMEDIES
CAUSES OF V-BELTS FAILURE AND REMEDIES
CAUSES OF V-BELTS FAILURE AND REMEDIES
V-BELTS PULLEY’S TYPE
DIMENSIONS OF STANDARD V-GROOVED PULLEY
The maximum distance 'L' between the outside edges of the pulley, i.e.
the face wi...
CROSS
SECTION
GROOV
PITCH
WIDTH
(Wp)
MINIMUM
DISTANCE
FROM
OUTSIDE
DIAMETER
TO PITCH
DIAMETER
(b) mm
MINIMUM
GROOVE
DEPTH
...
NOTE :
1) See figure for symbol.
2) The tolerance on dimension apply to the distance between the centre of any
two grooves...
 Standard range of metric
pulleys
 Dual duty grooves to perfectly
match Classical ‘V’ & Space
Saver Wedge Belts
 Confor...
TAPER LOCK BUSHES
Easy & quick ‘shrink fit’ on the shafts by using only
Allen-key.
Available with finished bore & keyway i...
TAPER LOCK BUSHES - FIXING
=> Each component has three
similarly located half holes
parallel to the axis.
=>In the hub two...
Types of coupling misalignment.
STANDARD
COUPLING
STANDARD SPACER
COUPLING
EXTERNAL SPIDER
COUPLING
EXTERNAL SPIDER
SPACER COUPLING
ESSEX FLEXIBLE JAW COU...
CUSHION COUPLING CUSHION SPACER
COUPLING
ESSEX FLEXIBLE JAW COUPLING
 Absorbs shocks & damps small amplitude
vibrations.
 Caters incidental angular, parallel & axial
misalignment
Lubricati...
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Presentation v belt drives

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v belt drives

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Presentation v belt drives

  1. 1. WELCOME TO SEMINAR ON V-BELTS & DRIVES
  2. 2. V-BELTS RAW EDGE COGGED BELTS SPACE SAVER WEDGE BELTS POLY-V BELTS
  3. 3. TOP RUBBER LOAD CARRYING CORDS BASE RUBBER RUBBER IMPREGNATED FABRIC JACKET INCLUDED ANGLE40º CROSS–SECTION OF V-BELT
  4. 4. STIFF YET FLEX-CRACK RESISTANT POLYMER POLY FLOCK (POLY-F) COMPOUND FOR HIGHER LIFE RUBBERISED POLYESTER-COTTON BLENDED JACKET FOR FLEXIBILITY, BETTER TRACTION, FLEX & WEAR RESISTANCE  NEOPRENE IMPREGNATION & SPECIAL ADDITIVES MAKE BELTS HEAT RESISTANT, OIL RESISTANT & ANTI-STATIC SPECIAL ‘HMLS’ (HIGH MODULUS LOW STRETCH) POLYESTER CORDS CARRY HIGHER LOADS WITH MINIMUM STRETCH THE UNIQUE “HSS” PROCESS OF HEAT STRETCHING & LENGTH SETTING ENSURES THAT BELTS RETAIN THE TENSION AND STAY MATCHED NOT ONLY IN STORAGE BUT ALSO ‘ON THE DRIVE’. BELTS REQUIRE `ONE SHOT TENSIONING’ SO YOU CAN ‘FIT THEM & FORGET THEM’……..
  5. 5. TYPES OF V-BELTS & SECTION
  6. 6. SPACE SAVER WEDGE BELTS
  7. 7. • Wedge Belts drives are extraordinarily compact as they are capable of handling more power in a given space over Classical V-Belts of A, B, C, D & E Sections. • Narrower in cross section increases support for tension members in Wedge Belts and hence can not buckle. • Due to wedge belt pulley compactness reduce overhung thus improving the bearing life and in totality reducing the initial drive cost SPACE SAVER WEDGE BELTS
  8. 8. Option-1 Option-2 Motor Pulley size 660 mm Pitch Dia. with 34 Grooves of E-Section 660 mm Pitch Dia. with 36 Grooves of SPC-Section 725 mm Pitch Dia. with 32 Grooves of SPC-Section Pulley Face Width 1540 mm. 935 mm. 832 mm. Weight (approx.) 1500 Kg. 915 Kg. 850 Kg. COST (approx.) Rs. 1.75 Lac Rs. 1.45 Lac. Rs. 1.30 Lac Driven Pulley size 1575 mm Pitch Dia. with 34 Grooves of E-Section 1575 mm Pitch Dia. with 36 Grooves of SPC-Section 1735 mm Pitch Dia. with 32 Grooves of SPC-Section Pulley Face Width 1540 mm. 935 mm. 832 mm. Weight (approx.) 4100 Kg. 2780 Kg. 2544 Kg. COST (approx.) Rs. 5.50 Lac Rs. 4.40 Lac Rs. 3.90 Lac Belt Size E-418 / E-10710 x 34 Pcs. SPC-10600 x 36 Pcs. SPC-10600 X 32 Nos. COST (approx.) Rs. 2.65 Lac @ 7835/- Rs. 1.30 Lac @ 3631/- Rs. 1.16 Lac @3631 TOTAL COST Rs. 9.90 Lac Rs. 7.15 Lac Rs. 6.36 Lac Description E-Section V-Belt Drive SPC-Section Wedge Belt Drive For a 1500 HP drive with 740 R.P.M. Motor and Driven speed of 310 R.P.M., The conventional E-section drive Vs SPC-Section Wedge Belt Drive details :-
  9. 9. The distinct benefits of the Wedge Belt Drive are :- 1. The total Pulley-Belt package cost reduces by ∀• Option –1 : 28% (approx.) ∀• Option – 2 : 36% (approx.) 2. The replacement cost of belts would reduce by ∀• Option – 1 : 51% (approx.) ∀• Option – 2 : 56% (approx.) 3. Reduces shaft Bending moments & Bearing loads improving the Bearing life substantially due to lighter weight / lesser face width of SPC Wedge belt pulleys. 4. Improves power transmission efficiency.
  10. 10. LENGTH STABLE POLYESTER CORD MOULDED COG FABRIC POWERFLEX RAW EDGE COGGED BELTS
  11. 11. POWERFLEX RAW EDGE COGGED BELTS
  12. 12. POWERFLEX RAW EDGE COGGED BELTS Features  Very high flexibility due to moulded cogs.  Excellent transverse rigidity because of Polychloroprene rubber based compound with an-isotropic fiber orientation.  Very low stretch due to use of length stable polyester cords prepared with special adhesives.  Higher power rating of up to 30% over wrapped V-Belts. Three times more life. The higher power rating of Power flex means that they have more kW hours built into them. So they last 3 times longer when replacing wrapped V-belts utilising existing pulleys.  Low slip due to better arc of contact and pulley to belt geometrical relationship.  Energy loss reduced to an absolute minimum.  Drive ratios of 1:12 are possible which can eliminate multi-stage drives.
  13. 13. PRODUCT DETAILS CAN BE PRODUCED IN HIGH POWER CONSTRUCTIONS ALSO. N - SPECIFIES THE NO. OF BELTS PER BAND BELT CROSS-SECTION 66" - 148" 66" - 148" 66" - 590" 66" - 148" SIZE RANGE BANDED BELTS - CLASSICAL & WEDGE 3V SECTION C B A MAX. NO. OF BELTS/BANDTHICKNESS, mm 10.30 x N 25.40 x N 19.05 x N 15.38 x N BELT WIDTH, mm 10.00 17.00 13.00 10.00 10.30 25.40 19.05 15.38 PITCH, mm 6 4 6 8 5V 105" - 175" 17.50 x N 16.00 17.50 6 525.5021.0025.50 x N105" - 590"SPC 176" - 590"5V 17.50 x N 16.00 17.50 5 BANDED V BELTS
  14. 14.  ELIMINATE BELT WHIP, BELT TWIST AND BELT TURN OVER  IDEAL FOR DRIVES WHERE PULSATING LOADS ARE PRESENT  DO NOT REQUIRE SPECIAL PULLEYS BANDED V BELTS
  15. 15. POLY-V BELTS
  16. 16. POLY-V BELTS  COMPACT DRIVE Poly-V belt is highly flexible and hence can be used with smaller pulley diameter – lighter and compact drive.  HIGHER POWER Higher power rating per unit width compared to conventional V-belt - 40% higher  ZERO SLIPPAGE Eliminates the slippage due to maximum wedge contact on the pulleys.  REAR SIDE CAN ALSO DRIVE Being thinner the rear side can be used to drive additional accessories / idlers without affecting life.  HIGHER BEARING LIFE Lesser static tension gives higher bearing life.  SILENT DRIVE Gives vibration and noise free power transmission in every application.
  17. 17.  SINGLE BELT Eliminates the necessity to use multiple / matched set belts.  HIGHER SPEED Can be used at higher speed more than 40 m/sec.  LONGER LIFE Gives less wear and longer life to the pulleys due to less static tension and belt slippage.  LOW DOWNTIME & REPLACEMENT COST Reduces down time and also belt replacement cost. POLY-V BELTS
  18. 18. DO’S & DONT’S OF V-BELTS Drive Designing When assessing the power requirements of the drive, do not forget to apply the appropriate service factor for the combination of prime mover and driven machine. Consider not only the running characteristics of the machines(I.e. smooth, heavy shock, pulsating), but also any abnormal loads applied during starting by high torque motors, or the inertia of the driven machine. Pulley Diameter Selection Pulley diameters should be proportionate to the other components in the drive. Minimum diameter pulleys cause an unnecessary flexing of the belts and may lead to premature bearing failure on the machines. Large pulleys have obvious space and cost disadvantages. Minimum Recommended Pulley Diameters Given below are the minimum recommended pulley diameters for various sections of the belts for improved flex life. A B C D E SPZ SPA SPB SPC 80 125 200 315 500 67 90 160 224
  19. 19. DO’S & DONT’S OF V-BELTS Belt Guards Drives should not be completely enclosed by guards. Open mesh guards which allow normal air circulation but prevent any accidental contact with the drive are recommended. Belt Storage Belts should not be subjected to extremes of heat and cold. Standard belts can tolerate a considerable range of temperatures between –18 Deg C & +60 Deg C without damage. Drives designed outside this range will require special belts. Certain belts have a flame-resisting ability and will self-extinguish quickly in the case of fire. These belts should be used wherever there is danger of explosion. Alignment of pulleys and belts Check sheave alignment. Misalignment of sheave will shorten the belt life. Keep deflection angle less then 1/3 degree
  20. 20. DO’S & DONT’S OF V-BELTS Pulley grooves Uneven sheave grooves mismatched belts. Check grooves for wear. More than 1/32”(0.794 mm) of dished out may lead to shorten belt life. Installation of V-belts Slack off on take-up until belts can be places in grooves without forcing. Never pry the belts into the sheave grooves to prevent cords break. Give proper tension on V-belts. Check bearings or oil
  21. 21. Driving Pulley Driven Pulley SLACK SIDE TIGHT SIDE T2e T2e T1e T1e TENSIOING OF BELT DRIVES
  22. 22. Belt Tension Indicator 10 20 30 40 50 60 14 12 10 8 6 4 2 mm kg Deflection in mm Deflection Force in kg Belt Tension Indicator 16mm deflection per metre of span applied to mid-span
  23. 23. As the high performance of V-Belts requires correct tension, we recommend using the Belt Tension Indicator. Method of Belt Tensioning 1. Measure the span length 2. Multiply the span length in metres by 16 to obtain the deflection distance in mm. 3. Set the lower marker ring at the deflection distance required in mm on the lower scale. 4. Set the upper marker ring against the bottom edge of the top tube. 5. Place the belt tension indicator on top of the belt at the centre of span, and apply a force at right angles to the belt deflecting it to the point where the lower marker ring is level with top of the adjacent belt. 6. Read off the force value indicated by the top edge of the upper marker ring.
  24. 24. Belt Section SPZ SPA SPB SPC Z A B C Small Pulley Dia (mm) 56 to 95 100 to 140 90 to 132 140 to 220 140 to 224 236 to 315 224 to 355 375 to 560 56 to 100 80 to 140 125 to 200 200 to 400 Newton (N) 10 to 15 15 to 20 20 to 27 28 to 35 35 to 50 50 to 65 60 to 90 90 to 120 5 to 7.5 10 to 15 20 to 30 40 to 60 Kilogram - force (kgf) 1.0 to 1.5 1.5 to 2.0 2.0 to 2.7 2.8 to 3.5 3.5 to 5.1 5.1 to 6.6 6.1 to 9.2 9.2 to 12.2 0.5 to 0.8 1.0 to 1.5 2.0 to 3.1 4.1 to 6.1 If the measured force falls within the values given, the drive will be satisfactory. A measured force below the lower value indicates under- tensioning. A new drive should be tensioned to the higher value to allow for the normal drop in tension during the running-in period. After the drive has been running for a few hours the tension should be checked and re-adjusted to higher the value.
  25. 25. EFFECT OF UNDER-BELTING IN A 5 BELT DRIVE NO. OF BELTS % UNDER LIFE BELTING EXPECTANCY 5 NIL 100% 4 20% 45% 3 40% 17%
  26. 26. CAUSES OF V-BELTS FAILURE AND REMEDIES
  27. 27. CAUSES OF V-BELTS FAILURE AND REMEDIES
  28. 28. CAUSES OF V-BELTS FAILURE AND REMEDIES
  29. 29. CAUSES OF V-BELTS FAILURE AND REMEDIES
  30. 30. CAUSES OF V-BELTS FAILURE AND REMEDIES
  31. 31. CAUSES OF V-BELTS FAILURE AND REMEDIES
  32. 32. V-BELTS PULLEY’S TYPE
  33. 33. DIMENSIONS OF STANDARD V-GROOVED PULLEY The maximum distance 'L' between the outside edges of the pulley, i.e. the face width is equal to (x-1) e + 2f (where x is the number grooves)
  34. 34. CROSS SECTION GROOV PITCH WIDTH (Wp) MINIMUM DISTANCE FROM OUTSIDE DIAMETER TO PITCH DIAMETER (b) mm MINIMUM GROOVE DEPTH BELOW PITCH DIAMETER (h) mm CENTER TO CENTER OF GROOVE (e) mm EDGE IF PULLEY TO 1ST GROOVE CENTER (f) mm PITCH DIAMETER (dp)mm GROOVE ANGLE (ө) MINIMUM TOP WIDTH OF GROOVE (g) mm Z,SPZ 8.5 2 9 12 ± 0.3 8.0 ± 1.0 UPTO 80 34 ± 0.25 9.7 ZX,SPZX OVER 80 38 ± 0.25 9.9 A, SPA 11 2.75 11 15 ± 0.3 10 + 2.0 UPTO 118 34 ± 0.25 12.7 AX, SPAX -1.0 OVER 118 38 ± 0.25 12.9 B,SPB 14 3.5 14 19 ± 0.4 12.5 + 2.0 UPTO 190 34 ± 0.25 16.1 BX,SPBX -1.0 OVER 190 38 ± 0.25 16.4 C,SPC 19 4.8 19 25.5 ± 0.5 17 + 2.0 UPTO 315 34 ± 0.25 21.9 CX,SPCX -1.0 OVER 315 38 ± 0.25 22.3 D 27 8.1 19.9 37 ± 0.6 24 + 3.0 UPTO 475 36 ± 0.25 32.3 -1.0 OVER 475 38 ± 0.25 32.6 E 32 9.6 23.4 44.5 ± 0.7 29 + 4.0 UPTO 610 36 ± 0.25 38.8 -1.0 OVER 610 38 ± 0.25 39.3 3V,3VX 8.9 0.64 8 10.3 ± 0.4 8.7 + 2.0 UPTO 88 36 ± 0.25 10.7 -0.8 88 TO 152 38 ± 0.25 10.8 152 TO 305 40 ± 0.25 10.9 ABOVE 305 42 ± 0.25 11.0 5V,5VX 15.24 1.27 13.7 17.5 ± 0.4 12.7 + 3.0 UPTO 254 38 ± 0.25 18.0 -1.0 254 TO 406 40 ± 0.25 18.18 ABOVE 406 42 ± 0.25 18.36 8V,8VX 25.4 2.54 22.6 28.6 ± 0.4 19 + 6.0 UPTO 406 38 ± 0.25 29.97 -1.5 406 TO 569 40 ± 0.25 30.25 ABOVE 569 42 ± 0.25 30.50
  35. 35. NOTE : 1) See figure for symbol. 2) The tolerance on dimension apply to the distance between the centre of any two grooves whether adjacent or not. 3) It is recommended that the tolerance on dimension should be taken into account in the alignment of the pulleys. 4) When the pulleys are to be used for V-Belts Z, A, B, C only, dimension 'h' may be reduced by 20 %. 5) Only above dimension pulleys should be used for Banded belts except for 'A' section, where e = 15.9 mm. The tolerance for side wobble and for run out (eccentricity), in mm per millimeter of pulley diameter shall be as follows : Pulley diameter < 500 mm ± 0.001 mm 500 mm < Pulley diameter < 1500 mm ± 0.0015 mm Pulley diameter > 1500 mm ± 0.002 mm
  36. 36.  Standard range of metric pulleys  Dual duty grooves to perfectly match Classical ‘V’ & Space Saver Wedge Belts  Conform to IS 3142 groove specifications Speed ratios up to 1:7  Standard MOC Cast Iron Grade 20 IS:210  Pulleys with other grades of Cast Iron and Cast steel are also offered on request
  37. 37. TAPER LOCK BUSHES Easy & quick ‘shrink fit’ on the shafts by using only Allen-key. Available with finished bore & keyway in both metric & imperial sizes. Interchangeable between many products such as Pulleys, Couplings, Sprockets etc. Accommodates shaft tolerances + 0.051mm(0.002”) to - 0.127mm(0.005”).
  38. 38. TAPER LOCK BUSHES - FIXING => Each component has three similarly located half holes parallel to the axis. =>In the hub two these are full length tapped and corresponding hole in the taper lock bush is not tapped or part way through. => When tightened in the two threaded holes in the hub the screws touches bottom in the plain hole of the bush and forcing it into the taper. =>To release the taper grip and withdraw the bush from the hub, two screws are removed and one of them is tightened into the
  39. 39. Types of coupling misalignment.
  40. 40. STANDARD COUPLING STANDARD SPACER COUPLING EXTERNAL SPIDER COUPLING EXTERNAL SPIDER SPACER COUPLING ESSEX FLEXIBLE JAW COUPLING
  41. 41. CUSHION COUPLING CUSHION SPACER COUPLING ESSEX FLEXIBLE JAW COUPLING
  42. 42.  Absorbs shocks & damps small amplitude vibrations.  Caters incidental angular, parallel & axial misalignment Lubrication not required  Nitrile Rubber elastomeric inserts to withstand temperatures from - 40 Deg to +100 Deg C  Spacer coupling with spacer size depending upon the DBSE  MOC CI Grade 20 IS:210 ESSEX FLEXIBLE JAW COUPLING
  43. 43. Thank you

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