FLENDER Standard Couplings Highly Flexible Couplings — ELPEX Series © Siemens AG 2015 General information ■ Overview ELPEX couplings are highly torsionally flexible and free of tor- sional backlash. Because of their low torsional stiffness and damping capacity, ELPEX couplings are especially suitable for coupling machines with a very non uniform torque pattern. ELPEX couplings are also suitable for connecting machines with high shaft misalignment. Standard ELPEX coupling types are designed as shaft-shaft connections or flange-shaft connections. Application-related types can be implemented on request.
■ Benefits The ELPEX coupling is suitable for horizontal and vertical mount- ing positions or mounting at any required angle. The coupling parts can be arranged as required on the shafts to be con- nected. The coupling is delivered preassembled. The flexible rings are completely assembled. On the type ENG, the coupling halves have to be bolted together after the hub has been mounted. On the type EFG, after mounting the coupling hub, only the outer flange has to be connected to the machine. The split flexible rings can be changed without having to move the coupled machines. Outer flanges with different connection dimensions are available for the type EFG.
The flexible rings are mounted without backlash and give the coupling progressive torsional stiffness, i.e. torsional stiffness in- creases in proportion to coupling load. If the flexible rings are irreparably damaged or worn, the metal parts can rotate freely against one another, they are not in con- tact with one another. The ELPEX coupling is especially suitable for reversing opera- tion or operation with changing directions of load. ■ Application The ELPEX coupling is available in 9 sizes with a nominal torque of between 1600 Nm and 90000 Nm. The coupling is suitable for ambient temperatures of between -40 °C and +80 °C.
The ELPEX coupling is frequently used for high-quality drives which have to guarantee very long service life in harsh operating conditions. Examples of applications are mill drives in the ce- ment industry, marine main and secondary drives or drives on large excavators powered by an electric motor or diesel engine. ■ Design Design and function Materials: The ELPEX coupling's transmission characteristic is determined essentially by the flexible rings. The flexible rings are manufac- tured from a natural rubber mixture with a multiply fabric lining. The flexible rings are split so that they can be changed without having to move the coupled machines.
Hub part 1 Grey cast iron EN-GJL-250 12 Steel Hub part 2 Steel Steel Retaining ring, outer ENG, ENGS Grey cast iron EN-GJL-250 The flexible rings are fastened to the hub with a clamping ring and to the outer flange with a clamping ring, using pins and bolts. Outer flange EFG, EFGS Grey cast iron EN-GJL-250 Steel Steel On the type EFG, the outer flange is designed with connection dimensions for connection to e.g. a diesel engine flywheel. On ENG types, the outer flange is fitted to a second hub part, which then enables the shaft-shaft connection. Flexible ring materials: Natural rubber 70 ShoreA Size - 2 -40 °C ...
+80 °C 12/2 Siemens MD 10.1 · 2015 Type Cast iron Steel Material/ description Hardness Identification Ambient temperature