German marposs coupling marposs model marposs price

marposs couplings transmit motion by welding or bonding a thin-walled corrugated tube (bellows) directly to the two half-couplings. This type of coupling has a simple structure, small overall dimensions, is easy to machine and install, and offers high transmission accuracy. It is mainly used in low-power precision machinery and control mechanisms that require compact structures and high transmission accuracy. The coupling consists of two hubs and a thin-walled metal tube, connected by welding or bonding. Although many other materials are available, stainless steel and nickel are the most commonly used materials for the metal tube. Nickel tubes are produced by electrodeposition. This method first involves machining a solid mandrel into a corrugated shape, electroplating nickel onto the mandrel, and then chemically dissolving the mandrel to obtain the nickel bellows. This method allows control over the precision of the bellows wall thickness and can achieve thinner walls than bellows made by other methods. These thin-walled bellows give the coupling high sensitivity and rapid response, making it ideal for applications in extremely small and precise instruments.

marposs coupling structure

Couplings have two main structural forms: (1) achieves alignment of the two shafts using bolts in reamed holes and transmits torque through compression and shear on the bolt shanks; (2) achieves alignment by matching a shoulder on one half-coupling with a groove on the other. The bolts connecting the two half-couplings can be ordinary bolts of grade A and grade B, with torque transmitted via the frictional moment at the mating surfaces of the half-couplings. Flange couplings can be made of gray cast iron or carbon steel; for heavy loads or when the circumferential speed exceeds 30 meters/second, cast steel or forged steel should be used. 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.

marposs coupling features

1) Misalignment compensation. The misalignment compensation capability of a coupling refers to its ability to compensate for relative displacement between two rotating components. Manufacturing and installation errors between connected components, temperature changes during operation, and deformation under load 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. For applications with frequent loaded starts or varying working loads, the coupling must contain elastic elements that provide buffering and vibration damping 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.

marposs 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 buffering and vibration damping 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 operating space required for 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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