© Siemens AG 2015 FLENDER Standard Couplings Flexible Couplings — RUPEX Series General information For maximum coupling torque: T Kmax = 3.0 ⋅ T KN For overload torque: T KOL = 4 ⋅ T KN For coupling fatigue torque: T KW = 0.20 ⋅ T KN 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. 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 and type must be observed!
Permitted shaft misalignment Δ K perm = Δ K 1500 ⋅ FKV Torsional stiffness and damping Correction factor FKV 1.7 1.2 1.0 0.7 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. 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.
C Tdyn = C Tdyn 50 % ⋅ FKC Correction factor FKC 65/80/90 ShoreA 0.51 0.83 1.00 1.18 1.38 1.58 1.80 2.03 The damping coefficient is Ψ = 1.4 Furthermore, torsional stiffness and damping depend on the ambient temperature and the frequency and amplitude of the torsional vibration excitation. 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. 8 8/5 Siemens MD 10.1 · 2015 Speed in rpm 500 1000 1500 3000 Capacity utilization TN / TKN 20 % 40 % 50 % 60 % 70 % 80 % 90 % 100 %