Siemens Flender H2NV Series - Alignment

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BA 5060 EN 04/2011
6.3.1.1 Alignment
Orderspecific machined surfaces (alignment surfaces) are provided on the gear-unit top side for
preliminary alignment in horizontal direction.
Alignment surface:
For the exact position of the alignment surfaces please refer to the drawings of the gearunit
documentation.
The alignment surfaces are for aligning the gear unit horizontally, in order to ensure correct running of the
gear unit.
The values punched into the alignment surfaces must always be observed.
The final fine alignment with the assemblies on the in and output side must be carried out accurately by
the shaft axes, using:
• rulers
• spirit level
• dial gauge
• feeler gauge, etc.
Only then should the gear unit be fastened and after that the alignment should be checked once again.
• Record alignment dimensions.
The report must be kept with these instructions.
The accuracy of shaft axis alignment is an important factor in determining the life span
of shafts, bearings and couplings. If possible, the deviation should be zero
(exception: ZAPEX couplings). For amongst others the special requirements for the
couplings, refer to the specific operating instructions.
Nonobservance can cause shaft rupture, resulting in serious injury or danger of life.
6.3.2 Steel frame
The steel frame must be horizontal and plain. The gear unit must not be excessively
stressed when tensioning the fastening bolts.
The steel frame should be designed in such a way that no resonance vibrations are created and that no
vibrations are transmitted from adjacent components. The steel structure on which the gear unit is to be
fitted must be torsionally rigid. It must be designed according to the weight and torque, taking into account
the forces acting on the gear unit.
The gear unit must be aligned in the oblong holes such that the fan fitted on the output side has
all around the same distance from the defuser.
Fastening bolts or nuts must be tightened to the prescribed torque. For the correct
torque, refer to item 6.9. Bolts of the minimum strength class 8.8 must be used.
If external forces are acting upon the gear unit, it is advisable to prevent the unit from displacement by
means of lateral stops.
For dimensions, space requirement and arrangement of the addon parts and supply
connections, refer to the drawings in the gearunit documentation.