MAYEKAWA 4M - Page 43

Reciprocating Compressor M Series
3-7
For centering use a straight edge on the side of flywheel and motor pulley.
Centering standard: L=1 mm(0.04 inch) or less
Fig. 3-3 Centering standard
2. Loosen the slide base of motor and move the pulley closer to the compressor side, attach the V/C-belt to
groove rotate on to the pulley.
Check that the V / C-belt fits the groove V / C, and pull the motor so that the belt becomes tensioned.
Deflection = 0.008 × span length (mm) (Span length
ѳ Center distance)
Fig. 3-4 Deflection
No. Description No. Description
1 Tension meter 3 Deflection
2 Center distance 4 Span length
Table 3-2 Amount of deflection [mm(inch)]
Table 3-3 Amount of tension load (N/belt)
Note 1: Adjust the numbers on the Table 3-3 so that the numbers are 1.1 times larger, when using a new belt.
Note 2: Re-tighten the belt for the first time after 2²3 hours from the starting the operation.
Note 3: Rotate the flywheel (pulley) to check the tension load of belt.
Center distance
[mm(inch)]
1000
䋨39.37䋩
1100
(43.30)
1200
(47.24)
1300
(51.18)
1400
(55.12)
1500
(59.05)
1600
(62.99)
1700
(66.93)
Deflection [mm(inch)]
8.6(0.34) 9.5(0.39) 10.4(0.41) 11.3(0.44) 12.2(0.48)
13.0(0.51)
13.9(0.55) 14.8(0.58)
(Motor: 4Px50Hz(1,450rpm), Shaft distance: 1300mm, Narrow V Belt/ 8V, Fly wheel P.C.D: 475mm)