K - CK - CCK - Transfluid
K - CK - CCK - Transfluid K - CK - CCK - Transfluid
SELECTION 7.3 PERFORMANCE CALCULATIONS For frequent starts or high inertia acceleration, it is necessary to first carry out the following calculations. For this purpose it is necessary to know: Pm - input power kW nm - input speed rpm PL - power absorbed by the load at rated speed kW n L - speed of driven machine rpm J - inertia of driven machine Kgm T - ambient temperature °C The preliminary selection will be made from the selection graph Tab. A depending upon input power and speed. Then check: A) acceleration time. B) max allowable temperature. C) max working cycles per hour A) Acceleration time t a : n u • Jr t a = (sec) where: 9.55 • M a n u = coupling output speed (rpm) J r = inertia of driven machine referred to coupling shaft (Kgm 2 ) M a = acceleration torque (Nm) n u = n m • ( 100 - S ) where S is the percent slip derived from the characteristic curves of the coupling with respect to the absorbed torque M L . If S is not known accurately, the following assumptions may be made for initial calculations: 4 up to size 13” 3 from size 15” up to size 19” 2 for all larger sizes. J r = J • ( n L 100 ) n u 2 2 2 PD GD Note: J = or 4 4 2 B) Max allowable temperature. For simplicity of calculation, ignore the heat dissipated during acceleration. Coupling temperature rise during start-up is given by: T a = Q C (°C) where: Q = heat generated during acceleration (kcal) C = total thermal capacity (metal and oil) of coupling selected from Tab. C (kcal/°C). n u 10 Q = ( + ) (kcal) The final coupling temperature reached at the end of the acceleration cycle will be: T f = T + T a + T L (°C) 4 • J r • nu 76.5 where: T f = final temperature (°C) T = ambient temperature (°C) T a = temperature rise during acceleration (°C) T L = temperature during steady running (°C) P • L S T L = 2.4 • K (°C) where: K = factor from Tab. D T f = must not exceed 150°C C) Max working cycles per hour H In addition to the heat generated in the coupling by slip during steady running, heat is also generated (as calculated above) during the acceleration period. To allow time for this heat to be dissipated, one must not exceed the max allowable number of acceleration cycles per hour. M L • ta 3600 H max = t a + t L where t L = minimum working time 3 Q t L = 10 • (sec) T ( a + T • L ) K 2 8 M a = 1.65 M m - M L where: M m = 9550 • P m n m (Nominal Torque) 9550 dove: M L = • P L (Absorbed Torque) n u Fluid couplings - 0808 9
SELECTION 7.4 CALCULATION EXAMPLE Assuming: Pm = 20 kW n m = 1450 giri/min Supponendo: P L = 12 kW n L = 700 giri/min Supponendo: J = 350 kgm 2 Supponendo: T = 25°C Transmission via belts. From selection graph on Tab. A, selected size is 12K. A) Acceleration time From curve TF 5078-X (supplied on request) slip S = 4% 100 - 4 n u = 1450 ( • )= 1392 rpm 100 2 700 J r = 350 ( • )= 88.5 Kgm 1392 M m = 9550 • 20 1450 = 131 Nm 9550 • 12 M L = = 82 Nm 1392 2 Size 6 7 8 9 11 12 13 15 17 19 21 24 27 29 34 D34 46 D46 Tab. Tab. C C THERMAL CAPACITA' CAPACITY TERMICA Grandezza K K CK CK CCK CCK kcal/°Ckcal/C kcal/°C kcal/C kcal/°C kcal/C 6 0.6 7 81.2 91.5 11 2.5 12 3.2 13 4.2 15 17 6 199 12.8 21 24 15.4 27 21.8 29 29 34 D34 43 56 46 D46 92 138 – 332 0.6 1.2 - 1.5 -- 2.5 - 3.2 3.7 4.2 3.7 5 -- 6 6.8 5 9 10 10.3 12.8 6.814.6 15.8 15.4 10 17.3 10.319.4 21.814.6 25.4 15.827.5 29 32 33.8 17.3 19.4 43 50 53.9 56 25.4 63 27.5 66.6 9232 99 33.8101 13850 - 53.9 - - - 63 66.6 175 332 - - 99 101 – – – – 175 – M a = 1.65 •131 • 82 = 134 Nm 1392 • 88.5 t a = = 96 sec 9.55 • 134 B) Max allowable temperature 1392 88.5 • 1392 • 4 10 76.5 C = 4.2 kcal/°C (Tab. C) Q = ( + ) = 361 kcal 361 T a = = 86 °C 4.2 K = 8.9 (Tab. D) 12 T L = 2.4 • 4 • = 13°C 8,9 T f = 25 + 86 + 13 = 124°C C) Max working cycles per hour 3 361 t L = 10 • = 724 sec 86 ( 2 + 13 ) • 8.9 82 • 96 8 • • FACTOR COEFFICIENTE K K 500 350 300 200 100 80 60 50 40 30 20 10 9 8 7 6 5 4 3 2 D46K 800 1000 1200 46K D34K 34K 29K 27K 24K 21K 19K 17K 15K 13K 12K 11K 9K 8K Tab. D COEFFICIENTE FACTOR K 7K 6K H = 3600 96 + 724 = 4 starts per hour 1 500 600 700 800 1000 1400 2000 3000 4000 5000 900 1200 145 IT-10 VELOCITA' IN USCITA giri/min OUTPUT SPEED rpm Fluid couplings - 0808 10
- Page 1 and 2: K - CK - CCK FLUID COUPLINGS
- Page 3 and 4: DESCRIPTION & OPERATING CONDITIONS
- Page 5 and 6: DELAYED FILL CHAMBER ADVANTAGES 2.2
- Page 7 and 8: PRODUCTION PROGRAM 5 VERSIONS 5.1 I
- Page 9: SELECTION 7.2 SELECTION TABLE Fluid
- Page 13 and 14: SERIES 6 ÷ 19 KRG-…KRB-…KRD KR
- Page 15 and 16: SERIES 21÷34 …KRG…KRB…KRBP
- Page 17 and 18: SERIES 7÷34 KCG - CKCG - CCKCG - 4
- Page 19 and 20: SERIES 12÷34…KDMB - …KDMBP KDM
- Page 21 and 22: SERIES 17÷34 KRG3 - CKRG3 - CCKRG3
- Page 23 and 24: STANDARD PULLEYS ..KSI - ..KSDFKSI
- Page 25 and 26: SERIES D34 - D46KBM - D34KDM - D46K
- Page 27 and 28: SAFETY DEVICES OPERATION 10. SAFETY
- Page 29 and 30: SAFETY DEVICES OPERATION B FIG. 9 1
- Page 31 and 32: OTHER TRANSFLUID PRODUCTS FLUID COU
SELECTION<br />
7.4 CALCULATION EXAMPLE<br />
Assuming: Pm = 20 kW n m = 1450 giri/min<br />
Supponendo: P L = 12 kW n L = 700 giri/min<br />
Supponendo: J = 350 kgm 2<br />
Supponendo: T = 25°C<br />
Transmission via belts.<br />
From selection graph on Tab. A, selected size is 12K.<br />
A) Acceleration time<br />
From curve TF 5078-X (supplied on request) slip S = 4%<br />
100 - 4<br />
n u = 1450 (<br />
•<br />
)= 1392 rpm<br />
100<br />
2<br />
700<br />
J r = 350 (<br />
•<br />
)= 88.5 Kgm<br />
1392<br />
M m =<br />
9550 •<br />
20<br />
1450<br />
= 131 Nm<br />
9550 • 12<br />
M L = = 82 Nm<br />
1392<br />
2<br />
Size<br />
6<br />
7<br />
8<br />
9<br />
11<br />
12<br />
13<br />
15<br />
17<br />
19<br />
21<br />
24<br />
27<br />
29<br />
34<br />
D34<br />
46<br />
D46<br />
Tab. Tab. C C<br />
THERMAL CAPACITA' CAPACITY TERMICA<br />
Grandezza K<br />
K<br />
<strong>CK</strong><br />
<strong>CK</strong><br />
C<strong>CK</strong><br />
C<strong>CK</strong><br />
kcal/°Ckcal/C<br />
kcal/°C kcal/C kcal/°C kcal/C<br />
6<br />
0.6<br />
7<br />
81.2<br />
91.5<br />
11 2.5<br />
12<br />
3.2<br />
13<br />
4.2<br />
15<br />
17 6<br />
199<br />
12.8 21<br />
24<br />
15.4<br />
27<br />
21.8 29<br />
29 34<br />
D34 43<br />
56<br />
46<br />
D46<br />
92<br />
138<br />
–<br />
332<br />
0.6<br />
1.2<br />
-<br />
1.5<br />
--<br />
2.5<br />
-<br />
3.2 3.7<br />
4.2<br />
3.7<br />
5<br />
--<br />
6 6.8<br />
5<br />
9 10 10.3<br />
12.8 6.814.6<br />
15.8<br />
15.4 10 17.3 10.319.4<br />
21.814.6<br />
25.4 15.827.5<br />
29 32 33.8<br />
17.3 19.4<br />
43 50 53.9<br />
56<br />
25.4<br />
63<br />
27.5<br />
66.6<br />
9232<br />
99 33.8101<br />
13850<br />
- 53.9 -<br />
- -<br />
63 66.6<br />
175<br />
332 - -<br />
99 101<br />
–<br />
–<br />
–<br />
–<br />
175<br />
–<br />
M a = 1.65 •131<br />
•<br />
82<br />
= 134 Nm<br />
1392 • 88.5<br />
t a = = 96 sec<br />
9.55 • 134<br />
B) Max allowable temperature<br />
1392 88.5 • 1392<br />
•<br />
4<br />
10 76.5<br />
C = 4.2 kcal/°C (Tab. C)<br />
Q = ( + ) = 361 kcal<br />
361<br />
T a = = 86 °C<br />
4.2<br />
K = 8.9 (Tab. D)<br />
12<br />
T L = 2.4 • 4<br />
•<br />
= 13°C<br />
8,9<br />
T f = 25 + 86 + 13 = 124°C<br />
C) Max working cycles per hour<br />
3 361<br />
t L = 10 • = 724 sec<br />
86<br />
(<br />
2 + 13 ) • 8.9<br />
82 • 96<br />
8<br />
• •<br />
FACTOR COEFFICIENTE K<br />
K<br />
500<br />
350<br />
300<br />
200<br />
100<br />
80<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
9<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
D46K<br />
800 1000 1200<br />
46K<br />
D34K<br />
34K<br />
29K<br />
27K<br />
24K<br />
21K<br />
19K<br />
17K<br />
15K<br />
13K<br />
12K<br />
11K<br />
9K<br />
8K<br />
Tab. D<br />
COEFFICIENTE FACTOR K<br />
7K<br />
6K<br />
H =<br />
3600<br />
96 + 724<br />
= 4 starts per hour<br />
1<br />
500 600 700 800 1000 1400 2000 3000 4000 5000<br />
900 1200<br />
145 IT-10<br />
VELOCITA' IN USCITA giri/min<br />
OUTPUT SPEED rpm<br />
Fluid couplings - 0808<br />
10
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