Page 1606 - MISUMI Thailand Economy Series

[Technical Data]
Designing of Chain Drive Mechanism 2

Q Specification Selection for Low-Speed Operation Q Specification Selection for Low-Speed Operation with Impact Load Q Selection based on temperature
In operations using a chain speed of 50 m/min. or less, chain elongation due In operations with a great amount of impact loading due to frequent
to wear can almost be ignored. Under such low-speed conditions, the service startups, stops, reversing, or braking, the inertia(GD )of the prime
2
life of the chain largely depends on its fatigue strength. Low-speed operation mover and the driven machine needs to be taken into account.
is more economical than operation under "normal conditions". Low speed is Under such conditions, exercise extreme caution, as the chain can be
recommended for operations with fewer startups and stops that enable smooth subjected to loads much greater than in operation under normal conditions.
power transmission. Selection of ambient atmosphere, layout, lubrication, etc. for Select the chain using the following formula.
low-speed operation is the same as that for operation under normal conditions.
Selection should be made in accordance with the following formula. Max. Allowable Load Acting on Chain as Impact Speed
Load of Chain ≥ Calculated from the Starting x Coefficient x Coefficient
Application Coefficient N Torque of the Prime Mover (Table 5) (Table 4)
Max. Allowable ≥ Max. Tension N x (Table 1) x Speed Coefficient
Tension of Chain Working on Chain P.1599 (Table 4)
Impact Coefficient
Table 4. Speed Coefficients This is a constant, shown in(Table 5), determined by the ratio
Roller Chain Speed Speed Coefficient of inertia(GD )of prime mover to driven machine as well as the
2
0~15 m/min 1.0
15~30 1.2 magnitude of play in the power transmission mechanism used. Guide Table for Roller Chain Power Transmission Efficiency at High, Low Temperature
30~50 1.4 When the power transmission mechanism has excessive C-CHE Roller Chain
50~70 1.6 play, it loads greater impact than those in the table can result. Temperature C-CHE60 or Less C-CHE80 or Above
C-CHE12Bor Less C-CHE16B or Above
Table 5. Impact Coefficient
[1] Operating Conditions －60˚C or below － －
－
Same as for "Specifications Selection for Operation under Normal 3.0 －60˚C ～ －50˚C － Cannot Be Used
－50˚C ～ －40˚C
－
Conditions" 2.5 The mechanism has the play. －40˚C ～ －30˚C Cannot Be Used Catalog Value×1/4
[2] Chain and Number of Small Sprocket Teeth －30˚C ～ －20˚C Catalog Value×1/4 〃 ×1/3
From the selection guide table 3(P.1599), select a chain 2.0 －20˚C ～ －10˚C 〃 ×1/3 〃 ×1/2
1.5
－10˚C ～ 60˚C
and a sprocket slightly undersized for the rotary speed Impact Coefficient 1.0 The power transmission mechanism has no play by sagging of chain or something like that. 60˚C ～ 150˚C Catalog Value Catalog Value
0.8
Catalog Value
Catalog Value
(r/min)and the prime mover(kW)used. 0.6 150˚C ～ 200˚C 〃 ×3/4 〃 ×3/4
0.5
[3] Calculating the Chain Speed K 0.4 200˚C ～ 250˚C 〃 ×1/2 〃 ×1/2
Based on the sprocket selected(chain pitch, number of teeth)and the 0.3 Converted Inertia of the Motor Shaft of the Load Above 250˚C Cannot Be Used Cannot Be Used
number of revolutions(r/min), calculate the chain speed as follows. R= Inertia of the Motor C-CHE35 (Single Chain)
0.2 ■Transmission Capacity Table
V : Chain Speed(m/min) Number of Rotary Speed of Small Sprockets min(r/min)
P · N · n P: Chain Pitch(mm) 0.5 0.6 0.8 2 3 4 5 6 8 10 Small Sprocket 50 100 300 500 700 900 1200 1500 1800 2100 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 10000
V＝ 1000 (m/min) N: Number of Sprocket Teeth Winching Mill Teeth 9 0.06 0.11 0.29 0.46 0.63 0.79 1.02 1.25 1.48 1.69 1.98 1.62 1.29 1.05 0.88 0.75 0.66 0.57 0.51 0.46 0.41 0.37 0.34 0.31 0.27
Rollgang
n : Rotary of Sprocket Teeth(r/min) Hoist Conveyor Crane Truck 10 0.07 0.12 0.33 0.52 0.71 0.89 1.15 1.40 1.65 1.89 2.22 1.90 1.51 1.23 1.04 0.88 0.77 0.67 0.60 0.53 0.48 0.43 0.40 0.37 0.31
[4] Calculating the Max. Working Load on Chain Inertia Ratio R Flywheel 11 0.07 0.13 0.37 0.57 0.78 0.98 1.27 1.55 1.83 2.10 2.46 2.19 1.74 1.42 1.19 1.02 0.88 0.78 0.69 0.61 0.55 0.50 0.46 0.43 0.36
Calculating the Maximum Working Load on the Chain 12 0.08 0.15 0.40 0.63 0.86 1.07 1.40 1.71 2.01 2.31 2.70 2.50 1.98 1.62 1.36 1.16 1.01 0.88 0.78 0.70 0.63 0.57 0.52 0.48 0.41
13
0.09 0.16 0.44 0.69 0.94 1.17 1.52 1.86 2.19 2.52 2.95 2.81 2.24 1.83 1.53 1.31 1.13 0.99 0.88 0.79 0.71 0.65 0.59 0.54 0.46
F : Load on Chain(kN) 14 0.10 0.18 0.47 0.75 1.01 1.28 1.65 2.01 2.37 2.73 3.19 3.15 2.50 2.04 1.72 1.46 1.27 1.11 0.98 0.88 0.80 0.72 0.66 0.60 0.51
F＝ 60 · kW (kN) V : Chain Speed(m/min) 15 0.10 0.19 0.51 0.81 1.10 1.37 1.78 2.17 2.56 2.94 3.44 3.49 2.77 2.27 1.90 1.62 1.40 1.23 1.10 0.98 0.88 0.80 0.73 0.67 0.57
V
kW: Power Transmission(kW) 16 0.11 0.20 0.54 0.87 1.17 1.47 1.90 2.33 2.75 3.15 3.69 3.84 3.05 2.50 2.10 1.79 1.55 1.36 1.21 1.08 0.97 0.88 0.81 0.74 0.63
[5] Application Coefficient 17 0.12 0.22 0.58 0.93 1.25 1.57 2.04 2.48 2.93 3.36 3.94 4.21 3.34 2.74 2.29 1.95 1.69 1.49 1.32 1.18 1.07 0.97 0.88 0.81 0.69
18
0.13 0.23 0.62 0.98 1.33 1.67 2.16 2.64 3.12 3.58 4.19 4.59 3.64 2.98 2.50 2.13 1.85 1.62 1.44 1.29 1.16 1.05 0.96 0.88 0.75
From the application coefficient table(Table 1), select the appropriate coefficient. 19 0.13 0.25 0.66 1.04 1.41 1.77 2.29 2.80 3.30 3.80 4.44 4.98 3.95 3.23 2.71 2.31 2.01 1.76 1.56 1.40 1.26 1.14 1.04 0.95 0.82
[6] Speed Coefficient 20 0.14 0.26 0.69 1.10 1.49 1.87 2.42 2.96 3.49 4.01 4.69 5.37 4.27 3.49 2.94 2.50 2.16 1.90 1.69 1.51 1.36 1.23 1.13 1.04 0.88
Based on the chain speed obtained in[3]above, calculate the appropriate 21 0.15 0.28 0.73 1.16 1.57 1.97 2.55 3.13 3.68 4.23 4.95 5.78 4.59 3.75 3.15 2.69 2.33 2.04 1.81 1.62 1.46 1.33 1.21 1.11 0.95
speed coefficient. 22 0.16 0.28 0.77 1.22 1.66 2.07 2.69 3.28 3.87 4.47 5.20 6.12 4.92 4.03 3.37 2.88 2.50 2.19 1.95 1.74 1.57 1.42 1.30 1.19 1.02
[7] Maximum Allowable Tension of Chain 23 0.16 0.30 0.81 1.28 1.74 2.18 2.82 3.45 4.06 4.66 5.45 6.43 5.26 4.30 3.60 3.08 2.67 2.34 2.08 1.86 1.68 1.52 1.39 1.28 1.09
24
0.17 0.31 0.85 1.34 1.82 2.28 2.95 3.61 4.25 4.89 5.71 6.73 5.60 4.59 3.84 3.28 2.84 2.50 2.22 1.98 1.79 1.62 1.48 1.36 1.16
In the formula, substitute the values obtained in[4]~[6] 25 0.18 0.33 0.89 1.40 1.90 2.38 3.08 3.77 4.44 5.10 5.97 7.03 5.96 4.88 4.09 3.49 3.02 2.66 2.36 2.10 1.90 1.72 1.57 1.45 1.23
above as well as the maximum allowable tension for 26 0.19 0.34 0.93 1.46 1.98 2.48 3.22 3.93 4.63 5.33 6.23 7.34 6.32 5.17 4.33 3.70 3.21 2.81 2.50 2.24 2.01 1.83 1.67 1.53 1.31
the chain selected in [2] above. Check whether these 28 0.20 0.37 1.00 1.58 2.15 2.69 3.48 4.26 5.02 5.77 6.75 7.98 7.06 5.78 4.84 4.14 3.59 3.15 2.79 2.50 2.25 2.04 1.87 1.72 1.46
values satisfy the formula. If not, try again with another 30 0.22 0.40 1.08 1.71 2.31 2.90 3.75 4.59 5.41 6.21 7.27 8.58 7.83 6.41 5.37 4.59 3.98 3.49 3.10 2.77 2.50 2.27 2.07 1.90 1.62
32
0.23 0.43 1.16 1.83 2.48 3.11 4.02 4.92 5.80 6.60 7.76 9.18 8.65 7.06 5.92 5.05 4.38 3.84 3.41 3.05 2.75 2.50 2.28 2.10 0
chain and sprocket set.
[8] Number of Large Sprocket Teeth, Shaft Diameter, and Chain 35 0.25 0.48 1.28 2.01 2.73 3.42 4.44 5.42 6.39 7.34 8.58 10.1 9.85 8.06 6.77 5.78 5.01 4.40 3.90 3.49 3.15 2.86 2.61 2.40 0
0.29 0.54 1.47 2.33 3.16 3.95 5.13 6.27 7.38 8.50 9.92 11.7 12.1 9.85 8.28 7.06 6.12 5.37 4.77 4.27 3.84 3.49 0
40
Length same as for "Specification Selection for 45 0.34 0.62 1.67 2.65 3.58 4.49 5.82 7.11 8.36 9.62 11.3 13.3 14.4 11.8 9.85 8.43 7.30 6.41 5.68 5.09 0
Operation under Normal Conditions". Lubrication Method A B C
1601 Lubrication Method A:Drop Lubrication, B:Oil Bath Lubrication C:Forced Circulation Lubrication by Pump 1602
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