FLENDER Standard Couplings - DS TECH

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FLENDER Standard Couplings Highly Flexible Couplings — ELPEX Series © Siemens AG 2011 General information ■ Configuration The ELPEX coupling is especially suitable for rough operation. An application factor different from that in catalog section 3 is therefore sufficient for all applications. In the case of machines which excite torsional vibration, Siemens urgently recommends carrying out a torsional vibration calculation or measuring the coupling load occurring in the drive. Coupling selection Coupling load in continuous operation The operating principles of the driving and driven machines are divided into categories and the application factor FB derived from these in accordance with DIN 3990-1. Application factor FB Torque characteristic of the driving machine Electric motors, hydraulic motors, gas and water turbines Internal combustion engines Examples of torque characteristic in driven machines: • uniform with moderate shock loads: generators, fans, blowers • non uniform: reciprocating compressors, mixers, conveyor systems • very rough: crushers, excavators, presses, mills NR: Natural rubber mixture Torque characteristic of the driven machine uniform with non uniform very rough moderate shock loads 1.0 1.3 1.4 1.3 1.4 1.6 Temperature factor FT Temperature T a on the coupling Coupling Elastomer material to 60 °C -40 °C to -30 °C -30 °C to +50 °C to 70 °C to 80 °C ELPEX NR 1.1 1.0 1.25 1.40 1.60 Coupling load due to dynamic torque load Applying the frequency factor FF, the dynamic torque load must be lower than the coupling fatigue torque. Dynamic torque load T KW ≥ T W ⋅ FT ⋅ FF ⋅ 0.6 FB – 1.0 Frequency of the dynamic torque load f err ≤ 10 Hz frequency factor FF = 1.0 Frequency of the dynamic torque load f err >10Hz frequency factor FF=√ (f err /10Hz) Checking the maximum speed: The following must apply to all load situations: n Kmax ≥ n max Checking permitted shaft misalignment and restorative forces For all load situations the actual shaft misalignment must be less than the permitted shaft misalignment. Checking bore diameter, mounting geometry and coupling design The check must be made on the basis of the dimension tables. On request, couplings with adapted geometry can be provided. Checking shaft-hub connection Please refer to catalog section 3 for instructions. Checking temperature and chemically aggressive environment The permitted coupling temperature is specified in the Temperature Factor FT table. In the case of chemically aggressive environments, please consult the manufacturer. (450) 655-7447 info@pt-dstech.com www.dstech.ca Select size with: T KN ≥ T N ⋅ FB ⋅ FT Coupling load at maximum and overload conditions 12 The maximum torque is the highest load acting on the coupling in normal operation. Maximum torques at a frequency of up to 25 times an hour are permitted and must be lower than the maximum coupling torque. Examples of maximum torque conditions are: Starting operations, stopping operations or usual operating conditions with maximum load. T Kmax ≥ T max ⋅ FT Overload torques are maximum loads which occur only in combination with special, infrequent operating conditions. Examples of overload torque conditions are: Motor short circuit, emergency stop or blocking because of component breakage. Overload torques at a frequency of once a month are permitted and must be lower than the maximum overload torque of the coupling. The overload condition may last only a short while, i.e. fractions of a second. T KOL ≥ T OL ⋅ FT 1275 Newton, local 15 Boucherville, Qc, Canada, J4B 5H2 12/4 Siemens MD 10.1 · 2011
© Siemens AG 2011 FLENDER Standard Couplings Highly Flexible Couplings — ELPEX Series General information ■ Technical data Power ratings Size Rated torque Maximum torque Overload torque Fatigue torque Dynamic torsional stiffness for 100 % capacity utilization Stiffness Permitted shaft misalignment at speed n =1500rpm Axial Radial Axial Radial Angle T KN T Kmax T KOL T KW C Tdyn C a C r ∆K a ∆K r ∆K w Nm Nm Nm Nm kNm/rad N/mm N/mm mm mm Degree 270 1600 4800 6400 640 22.0 660 770 2.2 2.2 0.2 320 2800 8400 11200 1120 38.0 780 910 2.6 2.6 0.2 375 4500 13500 18000 1800 63.0 970 1130 3 3 0.2 430 7100 21300 28400 2840 97.0 1160 1350 3.4 3.4 0.2 500 11200 33600 44800 4480 155 1410 1630 3.8 3.8 0.2 590 18000 54000 72000 7200 240 1710 1990 4.2 4.2 0.2 690 28000 84000 112000 11200 365 2060 2390 4.6 4.6 0.2 840 45000 135000 180000 18000 685 2570 2990 5 5 0.2 970 90000 270000 360000 36000 1100 3020 3510 5.5 5.5 0.2 1275 Newton, local 15 Boucherville, Qc, Canada, J4B 5H2 The damping coefficient is Ψ =1.1 Torsional stiffness The dynamic torsional stiffness is load-dependent and increases in proportion to capacity utilization. The values specified in the selection table apply to a capacity utilization of 100 %. The following table shows the correction factors for different rated loads. C Tdyn = C Tdyn 100 % ⋅ FKC Capacity utilization T N / T KN 20 % 50 % 60 % 70 % 80 % 100 % 200 % Correction factor FKC 0.3 0.56 0.65 0.74 0.82 1 1.9 Torsional stiffness also depends on the ambient temperature and the frequency and amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request. Permitted shaft misalignment The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The following table shows the correction factors for different speeds. The maximum speed for the respective coupling size must be noted! ∆K perm = ∆K 1500 ⋅ FKV Speed in rpm 500 1000 1500 3000 Correction factor FKV 1.6 1.25 1.0 0.70 12 (450) 655-7447 info@pt-dstech.com www.dstech.ca Siemens MD 10.1 · 2011 12/5
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