Product Paper Barrel Couplings RINGFEDER® TNK
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Barrel Couplings Product Paper & Tech Paper

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Your projects are our drive Know-how: Over 90 years of expertise. Rely on decades of engineering expertise from the inventor of the friction spring. As an expert in drive and damping technology, we are your reliable partner wherever forces are at work. Be it the permanent transfer of very high torques due to non-positive or positive connections or the absorption and trapping of extreme energies to protect expensive constructions. Your expert partner: From development to the finished product. We accompany you through to the successful completion of your project. Beginning with the...

RINGFEDER® Barrel Couplings Introduction The barrel couplings complement the portfolio of the well-proven RINGFEDER® couplings for crane and hoisting gear applications. The comprehensive range of RINGFEDER® drive couplings that connect the driving motor with the gearbox and which are generally equipped with brake discs, or brake drums, where required, have been offered for decades as a package solution by brake manufacturers and distributed under their own name. The optimized barrel coupling series for connecting the gearbox output shaft with the rope drum extends the RINGFEDER® portfolio...

Barrel Coupling Statically indeterminate because of three-point bearing. Misalignment errors cause considerable undesired reaction forces. Statically determinate situation produced by the barrel coupling (joint). Discrepancies from the alignment will be balanced out. Performance and Application Optimized Type, Construction acc. to Operation Sheet of the German Steel Iron Industry SEB 666212 Disclaimer of liability All technical details and notes are non-binding and cannot be used as a basis for legal claims. The user is obligated to determine whether the represented products meet his...

The barrels in the coupling typically dispose of an axial clearance so that axial movements between the rope drum and the gearbox are compensated. In such a configuration, the joint acts like a non-locating bearing. The inner cover integrated in the flange allows the hub diameter and thus also the bore diameter to be increased and fixes the barrel roller axially to the drum. To the outside and thus in the direction of the gear unit, axial fixation is provided by a retaining ring, which is also supported by an additional thrust ring. This construction complies with the specifications of the...

1. Hub 2. Sleeve 3. Barrel roller 4. External cover 6. Sealing ring 7. Retaining ring 15. Housing screws Coupling Size Selection Considering the group classification according to FEM or DIN, the coupling size is determined on basis of: It can be calculated on basis of: a) maximum motor power or installed power b) required motor power 1. the torque to be transmitted 2. the applied radial load 3. verification of the geometric dimension a) Calculating the torque on basis of the maximum motor power Pi In this approach, the power reserve of the motor is included in the calculation of the torque:...

b) Calculating the torque on basis of the required power PN In this approach, the torque required to lift the load is calculated taking into account the system-related additional forces:  with plain bearings  with ball bearings Rope fastening both sides to drum PN = FR * vT / 60000 TK = 9550 * PN / n * k1 or TK = FR * D / 2 * k1 PN = Required power FR = Entire tackle at the drum, including the lifting gear paying regard to the efficiencies and drum bearings (see 2. selection on basis of the radial load) Rope velocity at the drum Rope fastening one side with external fixed point D =...

According to the design rules of FEM 1.001, version 1998 and BS466, version 1984, the safety factor k2 has to be considered for the radial load: Safety factor k2 Load spectrum The value FR which is to be calculated for the selected coupling must be lower than the permissible radial load FRmax indicated in the tables. drum. Other hub-shaft connections can also be provided. The transmission capability of the hub-shaft connection has to be checked for each type of connection. If an interference fit is used as a hub-shaft connection, the influence of the interference on the functionally required...

Barrel Couplings RINGFEDER® TNK TKVO Further information on RINGFEDER® TNK TKVO on www.ringfeder.com Performance and Application Optimized Type The type RINGFEDER® TNK TKVO is a torsionally stiff barrel coupling with hub and housing made of high-strength material. The inner ring integrated in the flange enables quick and easy assembly with an extremely compact coupling design. The type incorporates construction according to the operation sheet of the German Steel Iron Industry SEB 666212 for rope drum hinge joints. Characteristics Torsionally rigid, compensate for angular and axial shaft...

Tech Paper Barrel Couplings RINGFEDER® TNK Tables & Values For the correct selection of a suitable coupling size, it is essential to observe the equations and recommendations in the chapter “Coupling Size Selection”.

Tech Paper Barrel Couplings RINGFEDER® TNK TKVO Performance and Application Optimized Type * Construction and design acc. to operation sheet of German Steel Iron Industry SEB 666212 To continue see next page