Manual for Induction Motors and Generators
Installation and Alignment -
21
3BFP 000 050 R0101 REV E
3.3.2 Disassembly of the transport locking device
Some machines and all machines with sleeve or roller bearings have transport locking devices
installed. For machines with sleeve or cylindrical roller bearings, the transport locking device is
made of a steel bar attached to both the bearing shield on the D-end and to the end of the shaft
extension.
The transport locking device has to be removed prior to installation. The shaft extension has to
be cleaned of its anti-corrosive coating. The locking device should be stored for future use.
NOTE: In order to avoid bearing damages, the transport locking device must be fitted to the
machine whenever the machine is moved, transported to another location or stored. See
Chapter 2.1 Protective measures prior to transport
.
3.3.3 Coupling type
***Following paragraph for bearing type: Rolling bearing
Machines with rolling bearings must be connected to the driven machine with flexible
couplings, e.g. pin couplings, or gear couplings.
If the axially locked bearing is at the N-end (see dimension drawing), make sure that a
continuous free axial movement is possible between the coupling halves in order to permit
thermal expansion of the machine shaft without damaging the bearings. The expected axial
thermal expansion of the rotor can be calculated as defined in the
.
***Following paragraph for mounting type: Vertical
Vertical machines may be designed to carry some load from the shaft of the driven machine. If
this is the case, the coupling halves have to be locked against slipping in the axial direction by a
lock plate on the end of the shaft.
NOTE: The machine is not suitable for belt, chain or gear connection unless it is specifically
designed for such use. The same applies for high axial thrust applications.
***Following two paragraphs and figure for bearing type: Sleeve bearing with axial float
The sleeve bearing construction allows the rotor to move axially between the mechanical end
float limits. Standard bearings cannot withstand any axial forces from the driven machine. Any
axial force from the load will cause bearing damage. Therefore, all axial forces must be carried
by the driven machine and the coupling must be of limited axial float type.
3.3.4 Assembly of the coupling half
3.3.4.1 Balancing of coupling
The rotor is dynamically balanced with half key as standard. The way of balancing is stamped to
the shaft end:
•
H = half-key and
•
F = full key
The coupling half must be balanced respectively.
