German poly-norm coupling poly-norm model poly-norm price

poly-norm coupling slider is ring-shaped, made of steel or wear-resistant alloy. Cross-slider couplings are suitable for transmissions with lower speeds and higher torque transmission. The slider coupling consists of two shaft hubs and a central slider. The central slider, as a torque-transmitting element, is usually made of engineering plastic; in special cases, other materials such as metal can be selected.

poly-norm coupling structure

There are two main structural forms of couplings: (1) alignment of the two shafts is achieved by bolts in reamed holes, and torque is transmitted by the bolt shank withstand compression and shear; (2) alignment is achieved by the fit between the shoulder on one half-coupling and the groove on the other half-coupling. The bolts connecting the two half-couplings can be grade A and grade B ordinary bolts, and torque is transmitted by the frictional moment at the joint surface of the two half-couplings. Flange couplings can be made of gray cast iron or carbon steel; cast steel or forged steel should be used under heavy loads or when the circumferential speed exceeds 30 m/s. Depending on the magnitude of the transmitted torque, all bolts on the flange can be bolts for reamed holes, or half can be bolts for reamed holes and the other half ordinary bolts.

poly-norm coupling features

1) Misalignment compensation capability. The misalignment compensation capability of a coupling refers to its ability to compensate for the relative displacement between two rotating components. Manufacturing and installation errors between connected components, temperature changes during operation, and load-induced deformation all impose requirements on misalignment compensation. This capability can compensate for or alleviate additional loads on shafts, bearings, couplings, and other components caused by relative displacement between rotating components. 2) Damping capability. For applications with frequent loaded starts or varying working loads, the coupling must contain elastic elements that provide damping and vibration isolation to protect the prime mover and driven machine from damage. 3) Safe and reliable, with sufficient strength and service life. 4) Simple structure, easy to assemble, disassemble, and maintain.

poly-norm coupling selection

Selection of coupling type: When selecting a coupling type, the following factors should be considered. 1) The magnitude and nature of the torque to be transmitted, requirements for damping and vibration isolation functions, and the possibility of resonance. 2) The degree of relative displacement between the axes of the two shafts caused by manufacturing and assembly errors, shaft loading, thermal expansion deformation, and relative motion between components. 3) Permissible overall dimensions and installation methods, as well as the necessary operating space for convenient assembly, adjustment, and maintenance. For large couplings, disassembly and assembly should be possible without axial movement of the shaft. In addition, working environment, service life, lubrication, sealing, and economic factors should be considered, and a suitable coupling type should be selected based on the characteristics of various couplings.

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