VTP pulleys Flexible couplings TB pulleys (solid)1998 VTP pulley design invented by Valdemar Birn...

1/-Transmission programme

Transmission programme

VTP pulleys

TB pulleys (solid)

Flexiblecouplings

• History & Facts• Range & sizes• Terms• Function

• Taper Bush• Belts

• Dimensions/tolerances• Cataloque - pulleys• VTP Advantages

• Weight reduction• Increased speed• Reduced belt temperature• Other advantages

• Samples• Questions ?

Agenda

History - facts

History1998 VTP pulley design invented by Valdemar Birn1999 Prototypes and loadtests2000 First VTP pulley on the market2000 - 2003 Additional tests: Temperature, wear, noice etc.

Today• More than 250.000 VTP pulleys sold in EU• Main applications:

• Compressors,• Ventilating plants / Airconditioning• Paper mills,• Agriculture• …etc.

2a/ Facts - VTP pulley

2/- TB/VTP pulley

VTP® PulleySG Iron GGG 60SPZ, SPA, SPB, SPC - Diam 170 - 1250 mm

TB PulleyGrey Iron GG 25SPZ, SPA, SPB, SPC - Diam 50 - 236 mm

Pulley programme

Rim

Arms/spokes

Hub

Shaft

Bush

Screws

Grooves

VTP Pulley

Dmmm

ang.deg.

lpmm

hmm

bmm

fmm

emm

80 38 8,5 9 2 8 12

118 38 11 11 2,75 10 15

190 38 14 14 3,5 12,5 19

315 38 19 19 4,75 17 25,5

VTP Pulley - grooves

ISO 4183

ØD

mCord

Compression zone

Sealing coat

VTP pulley

V-belts

V-belt (Raw edge)

Taper Bushes >>

Taper Bush

Advantages

3/- Adv. Weight reduction

AdvantagesWeight reduction : 40-50%

Increased speed : Up to 100 m/s

Reduced belt temperature : 10- 17 deg Celsius

1.

2.

3.

Balancing

Application sample

4/- Weight reduction

Type Dm Grooves Weight before [kg] Weight VTP [kg] Reduction [kg] Reduction [%]SPZ 710 8 42,1 24,90 17,20 40,9%SPZ 800 6 40,6 24,40 16,20 39,9%SPZ 800 8 43,6 28,30 15,30 35,1%SPA 630 6 48,9 25,20 23,70 48,5%SPA 800 3 40,6 24,40 16,20 39,9%SPA 800 4 49,9 29,90 20,00 40,1%SPA 800 5 59,8 35,90 23,90 40,0%SPA 800 6 67,6 33,00 34,60 51,2%SPB 400 10 40,6 22,80 17,80 43,8%SPB 450 10 53,5 29,30 24,20 45,2%SPB 500 10 60,5 32,90 27,60 45,6%SPB 560 8 52,3 34,80 17,50 33,5%SPB 630 6 40,3 27,90 12,40 30,8%SPB 630 8 56,2 35,10 21,10 37,5%SPB 710 5 45,5 33,90 11,60 25,5%SPB 710 6 56,3 38,20 18,10 32,1%SPB 800 4 44 35,70 8,30 18,9%SPB 900 5 66,3 39,80 26,50 40,0%SPC 335 8 40,4 23,50 16,90 41,8%SPC 355 8 43,9 23,10 20,80 47,4%SPC 375 6 40,9 19,40 21,50 52,6%SPC 375 8 48,5 26,40 22,10 45,6%SPC 400 6 41,1 21,40 19,70 47,9%SPC 400 8 55,9 29,30 26,60 47,6%SPC 425 6 52,7 30,60 22,10 41,9%SPC 425 8 60,9 32,80 28,10 46,1%SPC 450 6 56,4 30,60 25,80 45,7%SPC 450 8 66,8 36,90 29,90 44,8%SPC 475 6 57,6 32,50 25,10 43,6%SPC 475 8 70 39,60 30,40 43,4%SPC 500 5 41,1 26,20 14,90 36,3%SPC 500 6 55,1 34,20 20,90 37,9%SPC 530 5 54,6 31,00 23,60 43,2%SPC 530 6 60,1 37,00 23,10 38,4%SPC 560 4 41,5 25,30 16,20 39,0%SPC 560 5 57,3 36,30 21,00 36,6%SPC 560 6 63,8 39,80 24,00 37,6%SPC 630 3 42,8 27,60 15,20 35,5%SPC 630 4 50,2 31,80 18,40 36,7%SPC 710 3 50,5 30,30 20,20 40,0%

Average reduction [%] 40,5%

Weight reduction40-50 %

Table 1Pulleys reducedfrom more than 40kg to less than 40kg

Table 1

Weight reduction

5/- Weight reduction

ExampleTB SPC 450-8 – VTP SPC 450-8

Weight reduction

Pulley SPB 400-8 Pulley VTP SPB 400-8

Dm 400 [mm] Dm 400 [mm]Moment of Inertia 1,2 kgm2 Moment of Inertia 0,614 kgm2

Revolutions 1800 rpm Revolutions 1800 rpmAvg. number of starts per day 300 Avg. number of starts per day 300

ω 188,5 [s -1] ω 188,5 [s -1]Ekin per start 21.318,3 Joule Ekin per start 10.907,9 Joule

Ekin per year (360 days) 2.302.381,3 KJ Ekin per year (360 days) 1.178.051,8 KJ

Pkin 639,6 kWh Pkin 327,2 kWh

Effeciency 0,85 Effeciency 0,85

Pkinmotor per year 752,4 kWh Pkinmotor per year 385,0 kWh

367,4 kWh

Price per kWh 0,2 €73,49 € / year

Saving amount kWh per year

Saving costs per year

Startup energy

Because of the tangentialconnection between arms andhub the tensile stress in thearms will be reduced as thehub is able to rotate fractionsof degrees during the coolingperiod after casting.

Smaller tension in arms

6/- Adv. Increased speed




1.

2.

3.

Balancing

Application sample

double speedis

double power!!

7/- Increased speed

Setup:

5 kW motor (n1 = 3000 rpm)Frequency changerSPA 200-2, SPA 100-2SPB 355-4

The SPB 355-4 mountet as shownwith no belts, and the rotationalspeed n2 is increased to 7400 min-1 ~138 m/s.

No damage on pulley, and furthertests were not found expedient.

d3 = SPB 355-4

d2 = SPA 100-2d1 = SPA 200-2

Increased speed (test)

8/- Adv. Reduced belt temp.



Reduced belt temp. : 10-17 deg Celsius

1.

2.

3.

Balancing

Application sample

9/- Reduced belt temperature

Reduced belt temperature

Traditional SPB 250-4(After 2 working hours)

VTP SPB 250-4(After 2 working hours)

10/- Reduced belt temperature (results)

Results of measuring working temperatures

~ 12 °C6632,72500 min-1

~ 11 °C6639,33000 min-1

~ 8 °C84262000 min-1

~ 5 °C6619,51500 min-1

~ 5 °C46131000 min-1

Max ∆TPower[kw]

Peripheral speed[m/s]

SPB 250-4 vs. VTP SPB 250-4

Reduced belt temperature

Every 10°C reducedbelttemperature

=Double lifelength!!

Reduced working temperature 3000 rev. / 39,3 m/s

11/- Balancing




1.

2.

3.

Balancing

Application sample

12/- Balancing

BalancingStandard balancing grade (ISO 1940) :

G16 (30m/s)

Static / Dynamic balancing (ISO 254) :

SPCNumber of grooves 3 4 5 6 8 nFace width (B) [mm] 85 110,5 136 161,5 212,5 v = 30

Dm [rev/min]212 2961 2703224 2881 2558236 2806 2428250 2727 2392 2156 1978 1725 2292265 2648 2323 2094 1921 1675 2162280 2577 2260 2037 1869 1630 2046300 2489 2183 1968 1806 1574 1910315 2429 2131 1920 1762 1536 1819335 2356 2066 1862 1709 1490 1710355 2288 2007 1809 1660 1447 1614375 2226 1953 1760 1615 1408 1528400 2156 1891 1704 1564 1363 1432425 2091 1834 1653 1517 1323 1348450 2032 1783 1607 1474 1285 1273475 1978 1735 1564 1435 1251 1206500 1928 1691 1524 1399 1219 1146530 1873 1643 1481 1359 1184 1081560 1822 1598 1440 1322 1152 1023630 1718 1507 1358 1246 1086 909710 1618 1419 1279 1174 1023 807800 1524 1337 1205 1106 964 716

1000 1363 1196 1078 989 862 5731250 1219 1070 964 885 771 458

n1 [rev/min]

1,58 x 1011

Dm x Bn =1

n < n : Static balancing1n > n : Dynamic balancing1

v x 60Dm x 10 x-3

n =π

Special demands regarding balancingcan be arranged!

13/- Application sample




1.

2.

3.

Balancing

Application sample

Alt.: 1

Transmission withregular v-belt

pulleys

Transferring high power at high revolutions(Compressor customer)



Gearboxrequired!


nw = 8000 min-1

pw = 200kw

Required output: P = 200 kw , nw = 8000 min-1,

Alt.: 1Transmission with regular v-belt pulleys

Solution:n1 = 1500 min-1

d1 = 450 mm

Belt speed:

V = d1 x n1 x π /60= 0,45 x 1500 x π/60 = 35 m/s

n1 = 1500 min-1

P1 = 200kwd1 = SPB 450-8

n2 = 2000 min-1

d2 = SPB 335-8

n2 = nw/4 = 2000 min-1 (Gearbox)

n1 = d2/d1 x 2000 min-1

d2 = n1/n2 xd1 = 335 mm

Alt.: 2

Transmission with VTP/SG Ironpulleys




Alt.: 2Transmission with VTP/SG Iron pulleys

Gearboxeliminated!!

nw = 8000 min-1

pw = 200kw

P = 200 kw , nw = 8000 min-1,

n2 = 8000 min-1

d2 = SPA 170-10

dw = n1/nw x d1 = 170 mm

Belt speed:

V = d1 x n1 x π /60= 0,45 x 3000 x π/60 = 70 m/s

n1 = 3000 min-1

P1 = 200kwd1 = SPA 450-10

P1 = 200 kw , n1 = 3000 min-1, d1 = 0,45 m


18/- Other products

VTP pulleys Flexible couplings TB pulleys (solid)1998 VTP pulley design invented by Valdemar Birn...

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Transcript of VTP pulleys Flexible couplings TB pulleys (solid)1998 VTP pulley design invented by Valdemar Birn...