Basics
1,000
50m
Double Strand Conveyor Conveyor Length: 50m Chain Speed: 10m/min. Weight of Conveyed Material: 2,000kg/pc x 40pcs Chain: P=250mm R–Roller A-2 Attachment
Figure 4.23 Parameters for Example Selection Process
10. The allowable load of standard A attachment. There are eight A attachments under each pallet. Assume that four attachments receive the load equally. The load on the A attachments = 4,900 N. According to the catalogs, RF12 (basic series) or stronger is acceptable. 11. Taking into account the tension, the allowable roller load, and the allowable load for standard A attachments, RF26250-R (general series) or RF12250-BR (roller bearing) may be selected. 12. Motor size. Motor (kW) = T 3 V 3 1 ( h = 0.85 motor efficiency) 54.5 h
When using bearing roller conveyor chain, f 1 = 0.03. T = 2,000 kg 3 g
3 40 pieces 3 0.03 = 23.5 kN {2,400 kgf}
1,000
23.5 3 10
1
kW =
= 5.1 kW
3
54.5
0.85
When using RF series conveyor chain, f 1 = 0.08. T = 2,000 kg 3 g
3 40 pieces 3 0.08 = 62.8 kN {6,400 kgf}
1,000
62.8 3 10
1
kW =
= 13.6 kW
3
54.5
0.85
The process is straightforward and logical. And you can see that a bear- ing roller conveyor chain, because it has lower friction, allows you to use a smaller chain and a smaller motor.
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