FLENDER Standard Couplings Flexible Couplings — N-EUPEX and N-EUPEX DS Series © Siemens AG 2015 General information ■ Technical data Power ratings of the N-EUPEX series 7 For maximum coupling torque: T Kmax = 3.0 ⋅ T KN For coupling overload torque: T KOL = 3.5 ⋅ T KN For coupling fatigue torque: T KW = 0.15 ⋅ T KN , where T N > T W must be adhered to. The damping coefficient is Ψ = 1.4 Furthermore, torsional stiffness and damping depend on the am- bient temperature and the frequency and amplitude of the tor- sional vibration excitation. More precise torsional stiffness and damping parameters on request.
Torsional stiffness and damping 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. The values stated in the above table apply to a capacity utiliza- tion of 50 %, an excitation amplitude of 10 % T KN with the fre- quency 10 Hz and an ambient temperature of 20 °C.
Dynamic torsional stiffness is dependent on load and increases in propor- tion to capacity utilization. The following table shows the correc- tion factors for different nominal loads. Permitted shaft misalignment C Tdyn = C Tdyn 50 % ⋅ FKC 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 observed! Correction factor FKC 65/80/90 ShoreA 0.54 0.84 1.00 1.18 1.36 1.55 1.97 Δ K perm = Δ K 1500 ⋅ FKV Correction factor FKV 1.7 1.2 1.0 0.7 For fitting, a maximum gap dimension of S max.
= S + Δ S and a minimum gap dimension of S min. = S – Δ S are permitted. Shaft misalignments Δ K r and Δ K w may occur simultaneously. 1) The maximum speed of the respective type must be noted. For further information on permissible shaft misalignment, please see the operating instructions. 2) Does not apply to type H. Gap dimension Δ S for types DBDR and DBD coupling sizes 250, 280, 315 and 350 as well as for type EBD coupling sizes 250 and 280 is +2/-3 mm.
7/7 Siemens MD 10.1 · 2015 Size Rated torque for flexible type Torsional stiffness at 50 % capacity utilization for flexible type Assembly Permitted shaft misalignment at n = 1500 rpm 1) 65 ShoreA 80 ShoreA 90 ShoreA 65 ShoreA 80 ShoreA 90 ShoreA Gap dimension 2) Radial Angle TKN TKN TKN CTdyn 50 % CTdyn 50 % CTdyn 50 % ΔS ΔKr ΔKw Nm Nm Nm kNm/rad kNm/rad kNm/rad mm mm ° 58 11 19 19 0.21 0.50 0.93 1.0 0.2 0.15 68 21 34 34 0.39 0.90 1.80 1.0 0.2 0.15 80 37 60 60 1.05 2.40 4.50 1.0 0.2 0.12 95 63 100 100 1.64 4.00 7.40 1.0 0.2 0.12 110 100 160 160 2.49 6.00 11.4 1.0 0.2 0.10 125 150 240 240 3.70 9.00 17 1.0 0.25 0.10 140 230 360 360 5.60 13.2 25 1.0 0.25 0.10 160 350 560 560 11.2 26.7 51 2.0 0.3 0.10 180 550 880 880 19.2 46 88 2.0 0.3 0.10 200 850 1340 1340 31.6 75 139 2.0 0.3 0.09 225 1260 2000 2000 48 115 212 2.0 0.35 0.09 250 1760 2800 2800 68 162 302 2.5 0.35 0.08 280 2460 3900 3900 95 226 420 2.5 0.4 0.08 315 3500 5500 5500 171 370 730 2.5 0.4 0.08 350 4850 7700 7700 235 520 950 2.5 0.5 0.08 400 6500 10300 10300 316 750 1420 2.5 0.5 0.08 440 8500 13500 13500 390 930 1920 2.5 0.6 0.08 480 10500 16600 16600 510 1200 2300 2.5 0.6 0.07 520 13300 21200 21200 600 1410 2710 2.5 0.65 0.07 560 18300 29000 29000 1000 2340 4400 3.0 0.65 0.07 610 24000 38000 38000 1300 3030 5700 3.0 0.75 0.07 660 30900 49000 49000 1640 3800 7100 3.0 0.8 0.07 710 39000 62000 62000 2140 4900 9100 3.0 0.9 0.07 Capacity utilization TN / TKN 20 % 40 % 50 % 60 % 70 % 80 % 100 % Speed in rpm 500 1000 1500 3000