Gardner Denver RFL Series, Owner'S Manual

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RFL-7-500 Page 17
5.6.2 Flexible Coupling
In the case of direct coupling with the drive, e.g. diesel engine, a torsionally flexible coupling must be selected in accordance with
the details supplied by the motor manufacturer. This coupling must compensate for the cyclic irregularity of the drive.
5.6.3 Drive Shaft
The drive shaft must:
•
be constructed with a splined section,
•
be balanced,
•
have the smallest possible angle and be as short as possible.
The central axes of the drive shaft flanges must be parallel to each other.The drive shaft mounting flange must be fitted to the
drive shaft of the compressor.
The splined shaft section of the drive shaft must be screwed on to the mounting flange on the compressor shaft.
The drive shaft angle must not exceed 12° at a rotation speed of 1500 min
-1
.
Do not fit the drive shaft the wrong way round – pay attention to the markings.
Fig. 5.5 Drive shaft
5.6.4 V-Belt
If the engine speed must be geared up or down, a V-Belt drive is recommended. The nominal rotation speeds as in section 3.1
must be observed.
Units
Belt profile SPA
Belt pulley diameter DW mm ( in) 200 (2.874)
Max. operating pressure for V-Belt drive barg ( psig) 2.0 (29.0)
Max. operating vacuum for V-Belt drive mbar (in. Hg.) 300 (8.859)
Number of belts 5
Between the V-Belt pulley and the grille at least 12mm gap should be allowed, as it will restrict the intake of cooling air.
Assembly of the V-Belt drive
•
Ensure accurate parallel alignment of the axes in all planes of the driving and driven shaft.
•
The belt grooves in the belt pulleys must not be misaligned.
•
V-Belts of the correct lengths must be selected so that the belt tension is consistent.
•
The belt tension is correct if the assembled and tensioned V-Belts can be pressed down with the thumb by 16 to 20mm per
1000mm (0.63 to 0.79 in. Per 39.37 in.) axle span.V-Belt via electric motor is not permissible due to break-down torque.
1
Deflection: 16...20 mm for every 1 m axle
spacing,
(0.63 to 0.79 in. Per 39.37 in.)
2 Axle spacing
D
W
Belt pulley diameter: min. 200 mm (8 in)
Fig. 5.6 Correct V-Belt tension
1. Drive 2. Spline
3. Positional Marking 4. RFL 102