© Siemens AG 2015 FLENDER Standard Couplings Highly Flexible Couplings — ELPEX Series General information ■ Technical data Power ratings 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 fol- lowing table shows the correction factors for different rated loads. C Tdyn = C Tdyn 100 % ⋅ FKC 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 exci- tation.
More precise torsional stiffness and damping parameters on request. With elastic couplings the manufacturing process of the rubber elements and their aging primarily influence the rigidity value C Tdyn . For this reason calculation must be made with a tolerance for the dynamic rigidity of ± 20 %. The specified damping coeffi- cient Ψ is a minimum value with the result that the damping per- formance of the coupling corresponds at least to the specified value. Permitted shaft misalignment 12 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!
Δ K perm = Δ K 1500 ⋅ FKV Correction factor FKV 1.6 1.25 1.0 0.7 12/5 Siemens MD 10.1 · 2015 Size Rated torque Maximum torque Overload torque Fatigue torque Dynamic torsional stiffness for 100 % capacity utilization Stiffness Permitted shaft misalignment at speed n = 1500 rpm Axial Radial Axial Radial Angle TKN TKmax TKOL TKW CTdyn Ca Cr ΔKa ΔKr ΔKw 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 Capacity utilization TN / TKN 20 % 50 % 60 % 70 % 80 % 100 % 200 % Speed in rpm 500 1000 1500 3000