Transmission programme

Transcription

1 1/-Transmission programme Transmission programme VTP pulleys TB pulleys (solid) Flexible couplings

2 Agenda 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?

3 2a/ Facts - VTP pulley History - facts History 1998 VTP pulley design invented by Valdemar Birn 1999 Prototypes and loadtests 2000 First VTP pulley on the market Additional tests: Temperature, wear, noice etc. Today More than VTP pulleys sold in EU Main applications: Compressors, Ventilating plants / Airconditioning Paper mills, Agriculture etc.

4 2/- TB/VTP pulley Pulley programme VTP Pulley SG Iron GGG 60 SPZ, SPA, SPB, SPC - Diam mm TB Pulley Grey Iron GG 25 SPZ, SPA, SPB, SPC - Diam mm

5 Grooves VTP Pulley Rim Arms/spokes Hub Shaft Bush Screws

6 VTP Pulley - grooves SPZ Dm mm ang. deg. <= > lp mm h mm b mm f mm e mm 8, <= SPA > , <= SPB > ,5 12,5 19 <= SPC > , ,5 ISO 4183

7 Sealing coat V-belt (Raw edge) V-belts Cord ØDm Compression zone VTP pulley

8 Taper Bush Taper Bushes >>

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11 Advantages

12 3/- Adv. Weight reduction Advantages 1. Weight reduction : 40-50% 2. Increased speed : Up to 100 m/s 3. Reduced belt temperature : deg Celsius Balancing Application sample

13 4/- Weight reduction Weight reduction Weight reduction % Table 1 Pulleys reduced from more than 40 kg to less than 40 kg Type Dm Grooves Weight before [kg] Weight VTP [kg] Reduction [kg] Reduction [%] SPZ ,1 24,90 17,20 40,9% SPZ ,6 24,40 16,20 39,9% SPZ ,6 28,30 15,30 35,1% SPA ,9 25,20 23,70 48,5% SPA ,6 24,40 16,20 39,9% SPA ,9 29,90 20,00 40,1% SPA ,8 35,90 23,90 40,0% SPA ,6 33,00 34,60 51,2% SPB ,6 22,80 17,80 43,8% SPB ,5 29,30 24,20 45,2% SPB ,5 32,90 27,60 45,6% SPB ,3 34,80 17,50 33,5% SPB ,3 27,90 12,40 30,8% SPB ,2 35,10 21,10 37,5% SPB ,5 33,90 11,60 25,5% SPB ,3 38,20 18,10 32,1% SPB ,70 8,30 18,9% SPB ,3 39,80 26,50 40,0% SPC ,4 23,50 16,90 41,8% SPC ,9 23,10 20,80 47,4% SPC ,9 19,40 21,50 52,6% SPC ,5 26,40 22,10 45,6% SPC ,1 21,40 19,70 47,9% SPC ,9 29,30 26,60 47,6% SPC ,7 30,60 22,10 41,9% SPC ,9 32,80 28,10 46,1% SPC ,4 30,60 25,80 45,7% SPC ,8 36,90 29,90 44,8% SPC ,6 32,50 25,10 43,6% SPC ,60 30,40 43,4% SPC ,1 26,20 14,90 36,3% SPC ,1 34,20 20,90 37,9% SPC ,6 31,00 23,60 43,2% SPC ,1 37,00 23,10 38,4% SPC ,5 25,30 16,20 39,0% SPC ,3 36,30 21,00 36,6% SPC ,8 39,80 24,00 37,6% SPC ,8 27,60 15,20 35,5% SPC ,2 31,80 18,40 36,7% SPC ,5 30,30 20,20 40,0% Average reduction [%] 40,5% Table 1

14 5/- Weight reduction Weight reduction Example TB SPC VTP SPC 450-8

15 Startup energy Pulley SPB Pulley VTP SPB Dm 400 [mm] Dm 400 [mm] Moment of Inertia 1,2 kgm2 Moment of Inertia 0,614 kgm2 Revolutions 1800 rpm Revolutions 1800 rpm Avg. number of starts per day 300 Avg. number of starts per day 300 ω 188,5 [s -1 ] ω 188,5 [s -1 ] E kin per start ,3 Joule E kin per start ,9 Joule E kin per year (360 days) ,3 KJ E kin per year (360 days) ,8 KJ P kin 639,6 kwh P kin 327,2 kwh Effeciency 0,85 Effeciency 0,85 P kinmotor per year 752,4 kwh P kinmotor per year 385,0 kwh Saving amount kwh per year Price per kwh 0,2 Saving costs per year 367,4 kwh 73,49 / year

16 Smaller tension in arms Because of the tangential connection between arms and hub the tensile stress in the arms will be reduced as the hub is able to rotate fractions of degrees during the cooling period after casting.

17 6/- Adv. Increased speed Advantages 1. Weight reduction : 40-50% 2. Increased speed : Up to 100 m/s 3. Reduced belt temperature : deg Celsius Balancing Application sample

18 7/- Increased speed Increased speed (test) Setup: 5 kw motor (n 1 = 3000 rpm) Frequency changer SPA 200-2, SPA SPB d 3 = SPB double speed is double power!! The SPB mountet as shown with no belts, and the rotational speed n 2 is increased to 7400 min-1 ~ 138 m/s. No damage on pulley, and further tests were not found expedient. d 1 = SPA d 2 = SPA 100-2

19 8/- Adv. Reduced belt temp. Advantages 1. Weight reduction : 40-50% 2. Increased speed : Up to 100 m/s 3. Reduced belt temp. : deg Celsius Balancing Application sample

20 9/- Reduced belt temperature Reduced belt temperature Traditional SPB (After 2 working hours) VTP SPB (After 2 working hours)

21 10/- Reduced belt temperature (results) Reduced belt temperature Every 10 C reduced belttemperature = Double lifelength!! 1000 min -1 Reduced working temperature 3000 rev. / 39,3 m/s SPB vs. VTP SPB Peripheral speed Power [m/s] [kw] Max T ~ 5 C 1500 min -1 19,5 66 ~ 5 C 2000 min ~ 8 C 2500 min -1 32,7 66 ~ 12 C 3000 min -1 39,3 66 ~ 11 C Results of measuring working temperatures

22 11/- Balancing Advantages 1. Weight reduction : 40-50% 2. Increased speed : Up to 100 m/s 3. Reduced belt temperature : deg Celsius Balancing Application sample

23 12/- Balancing Balancing Standard balancing grade (ISO 1940) : G16 (30m/s) Static / Dynamic balancing (ISO 254) : n = 1 n = 1,58 x Dm x B v x 60-3 Dm x 10 x n < n : Static balancing 1 n > n : Dynamic balancing 1 Special demands regarding balancing can be arranged! π SPC Number of grooves n Face width (B) [mm] , ,5 212,5 v = 30 Dm n 1 [rev/min] [rev/min]

24 13/- Application sample Advantages 1. Weight reduction : 40-50% 2. Increased speed : Up to 100 m/s 3. Reduced belt temperature : deg Celsius Balancing Application sample

25 14/- Application sample Transferring high power at high revolutions (Compressor customer) Alt.: 1 Transmission with regular v-belt pulleys

26 15/- Application sample Transferring high power at high revolutions (Compressor customer) Alt.: 1 Transmission with regular v-belt pulleys Required output: P = 200 kw, n w = 8000 min -1, Solution: n1 = 1500 min -1 d 1 = 450 mm n 2 = n w /4 = 2000 min -1 (Gearbox) n1 = d2/d1 x 2000 min -1 d2 = n1/n2 xd1 = 335 mm n 1 = 1500 min -1 P 1 = 200kw d 1 = SPB n w = 8000 min -1 p w = 200kw Belt speed: V = d 1 x n 1 x π /60 = 0,45 x 1500 x π/60 = 35 m/s n 2 = 2000 min -1 d 2 = SPB Gearbox required!

27 16/- Application sample Transferring high power at high revolutions (Compressor customer) Alt.: 2 Transmission with VTP/SG Iron pulleys

28 17/- Application sample Transferring high power at high revolutions (Compressor customer) Alt.: 2 Transmission with VTP/SG Iron pulleys P = 200 kw, n w = 8000 min -1, n 1 = 3000 min -1 P 1 = 200kw d 1 = SPA P 1 = 200 kw, n 1 = 3000 min -1, d 1 = 0,45 m d w = n 1 /n w x d 1 = 170 mm n w = 8000 min -1 p w = 200kw Belt speed: V = d 1 x n 1 x π /60 = 0,45 x 3000 x π/60 = 70 m/s n 2 = 8000 min -1 d 2 = SPA Gearbox eliminated!!

29 18/- Other products