FLENDER Standard Couplings - DS TECH

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FLENDER Standard Couplings Highly Flexible Couplings — ELPEX-S Series General information © Siemens AG 2011 ■ Overview Coupling suitable for potentially explosive environments. Complies with Directive 94/9/EC for: II 2 G T3 D160 °C X II 2 G T4 D120 °C X (Type EST is not available in Ex version.) ■ Benefits ELPEX-S couplings are highly torsionally flexible and because of their low torsional stiffness and damping capacity are especially suitable for coupling machines with a highly non uniform torque pattern. Standard ELPEX-S coupling types are designed as flange-shaftconnections or shaft-shaft connections. Application-related types can be implemented on request. (450) 655-7447 info@pt-dstech.com www.dstech.ca The ELPEX-S coupling is suitable for horizontal and vertical mounting positions or mounting at any required angle. The coupling parts can be arranged as required on the shafts to be connected. ELPEX-S couplings are especially suitable for reversing operation or operation with changing directions of load. The rubber disk elements are fitted virtually without backlash and give the coupling linear torsional stiffness, i.e. the torsion stiffness remains constant even when the load on the coupling increases. There are 4 different rubber element versions with different grades of torsional stiffness available for each size from stock. On certain types the flexible rings can be changed without having to move the coupled machines. If substantial overload occurs, the rubber disk element of the coupling is irreparably damaged, the coupling throws the load and thus limits the overload for particular operating conditions. The coupling can be inserted and fitted blind e.g. in a bell housing. There are outer flanges with different connection dimensions available for each coupling size. ■ Application The ELPEX-S coupling is available as a catalog standard in 12 sizes with rated torques of between 330 Nm and 63000 Nm. The coupling is suitable for ambient temperatures of between -40 °C and +120 °C. The ELPEX-S coupling is frequently used for diesel motor drives or reciprocating compressor drives. Because the different rubber versions enable the torsional stiffness to be adjusted to meet requirements, the coupling is also suitable for drives which require a specific and preferably precalculated torsional vibration behavior setting. 11 ■ Design The rubber disk element is vulcanized onto a flange on the inside diameter. The flange can mount e.g. a Taper clamping bush or a hub. On its outer diameter the rubber disk element has driving teeth, which are inserted into the outer flange. The torque is transmitted positively between the rubber disk element and the outer flange. In the type for shaft-shaft connection the outer flange is screwed to a flange hub mounted on a machine shaft. Elastomer materials of the rubber disk element Material / description Hardness ShoreA Identification Ambient temperature Natural-synthetic rubber mixture 50 ° … 55 ° WN -40 °C … +80 °C Natural-synthetic rubber mixture 60 ° … 65 ° NN -40 °C … +80 °C Natural-synthetic rubber mixture 70 ° … 75 ° SN -40 °C … +80 °C Silicone rubber 55 ° … 65 ° NX -40 °C … +120 °C 1275 Newton, local 15 Boucherville, Qc, Canada, J4B 5H2 Materials ELPEX-S coupling types Type EST Types ESN. and ESD. Rubber disk element Grey cast iron Spheroidal graphite EN-GJL-250/elastomer cast iron EN-GJL-400/elastomer Hubs, part 1, part 2 Steel Steel Outer flange Cast aluminum Cast aluminum AlZnSi108.. AlZnSi108.. Sizes 680 and 770 Sizes 680 and 770 of spheroidal graphite of spheroidal graphite cast iron cast iron EN-GJS-500 EN-GJS-500 Steel of quality R m >450N/mm 2 Type Description ESN Coupling with hub, long or short version ESD Coupling with hub, with two rubber disk elements ESNR Coupling with hub, rubber disk element radially dismountable ESDR Coupling with hub with two rubber disk elements; rubber disk elements radially dismountable ESNW Coupling designed as a shaft-shaft connection with a rubber disk element; rubber disk element radially dismountable ESDW Coupling designed as a shaft-shaft connection with two rubber disk elements; rubber disk element radially dismountable EST Coupling suitable for mounting a Taper clamping bush 11/2 Siemens MD 10.1 · 2011
© Siemens AG 2011 FLENDER Standard Couplings Highly Flexible Couplings — ELPEX-S Series General information Part 3 Part 5 Part 2 Part 5 Part 3 Part 5 Part 2 G_MD10_EN_00056 Type ESN – long version Type ESD G_MD10_EN_00019 Part 3 Part 5 Part 2 Part 6 Part 3 Part 5 Part 2 1275 Newton, local 15 Boucherville, Qc, Canada, J4B 5H2 Type ESN – short version G_MD10_EN_00016 Part 3 Part 5 Part 2 Type ESDR G_MD10_EN_00020 Part 1 Part 3 Part 5 Part 2 G_MD10_EN_00017 G_MD10_EN_00021 11 Type ESNR Type ESNW Part 3 Part 5 Part 1 Part 6 Part 3 Part 5 Part 2 (450) 655-7447 info@pt-dstech.com www.dstech.ca Type EST G_MD10_EN_00018 Type ESDW G_MD10_EN_00022 Siemens MD 10.1 · 2011 11/3
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