Possible Faults When Selecting The Coupling And/Or Coupling Size; Possible Faults When Fitting The Coupling - Siemens FLENDER FLUDEX Series Operating Instructions Manual

9.3.1

Possible faults when selecting the coupling and/or coupling size

─ Important information for describing the drive and the environment are not communicated.
─ System power too high.
─ System speed too high or too low.
─ Starting frequency too high.
─ The ventilation of the coupling is inadequate.
─ Chemically aggressive environment is not being taken into consideration.
─ The ambient temperature is not permissible. Observe section 5.
─ Machining of a finished bore with incorrect diameter and/or incorrect fit assignment (see section 6 and
order­releated title page).
─ The transmission capacity of the shaft­hub connection is not appropriate to the operating conditions.
9.3.2

Possible faults when fitting the coupling

─ Components with transport or other damage are being fitted.
─ When fitting coupling parts in a heated condition, already fitted N­EUPEX flexible elements (12) are
being excessively heated.
─ When attaching the main coupling to the hub­carrier part (120), the O­rings (117, 138) are not fitted.
─ The shaft diameter is beyond the specified tolerance range.
─ Coupling sides are being interchanged, i.e. their assignment to the specified drive direction is incorrect.
─ Specified axial fixtures are not fitted.
─ Specified tightening torques are not being adhered to.
─ Alignment / shaft­misalignment values do not match the operating instructions.
─ An incorrect operating fluid and/or an incorrect quantity of operating fluid is being put in.
─ The coupled machines are not correctly fastened to the foundation, and as a result shifting of the
machines e.g. through loosening of the foundation screw connection is causing excessive
displacement of the coupling parts.
─ N­EUPEX flexible elements (12) are being omitted or incorrectly positioned.
─ The coupling safeguard does not comply with the guidelines to be applied. It considerably restricts
ventilation of the coupling.
─ Operating conditions are being changed without authorisation.
─ Components are being fitted to the coupling which transmit excessive axial forces or bending moments
to the coupling.
─ Add­on parts are not designed in compliance with the Directive 2014/34/EU and are an explosion
hazard.
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FLUDEX 4612 en
Operating instructions 10/2017