How to install the serpentine spring coupling

Published: 2021-03-29

The serpentine spring coupling is a metal elastic coupling with advanced structure. It relies on the serpentine spring sheet to transmit torque.Serpentine spring couplingIt is the leading shaft coupling transmission component in today's international machinery, and it is also a very common shaft coupling transmission component. There are nine types of serpentine spring couplings, namely the JS housing radial mounting type (basic type) serpentine spring coupling , JSB housing axial installation type serpentine spring coupling, JSS double flange connection type serpentine spring coupling, JSD single flange connection type serpentine spring coupling, SJS connection intermediate shaft type serpentine spring Couplings, JSG high-speed serpentine spring couplings, JSZ serpentine spring couplings with brake wheels, JSP serpentine spring couplings with brake discs, JSA safety serpentine spring couplings, etc. .

The main structure of the serpentine spring coupling is composed of two half couplings, two half outer covers, two sealing rings and a serpentine spring sheet.It transfers torque by embedding the serpentine spring into the tooth slots of the two coupling halves, and the coupling uses serpentine spring sheets to be embedded in the tooth slots of the two coupling halves to realize the link between the driving shaft and the driven shaft.During operation, the driven end is driven by the axial force of the active end tooth facing the snake spring to transmit torque, which largely avoids the occurrence of resonance phenomenon and the elastic variable generated by the reed when transmitting torque , So that the mechanical system can obtain a better damping effect, with an average damping rate of more than 36%.

The serpentine spring coupling relies on serpentine springs to transmit torque, with long service life, high transmission efficiency and reliable operation. Let me share with you how to install the serpentine spring coupling?

1. Carefully align the installation and control reasonable deviations

Although the serpentine spring coupling allows a large installation deviation, it should also be within the specified value during installation

(1) Align the gap and angular deviation between the two-lobe coupling. When installing, measure the gap between the two-lobe coupling every 90°, and the difference between the large value and the small value does not exceed 0.38mm.

(2) Correction of radial deviation.Place a ruler on the two-part coupling, and measure it every 90°. Use a ruler to check that the radial deviation does not exceed 0.38mm.

2. Choose the right grease

The temperature of the oil injection point is ≥150℃, which can resist centrifugal force, has separation stability, no impurities, and does not corrode carbon steel and nitrile rubber lithium-based grease.

3. Fill enough lubricating grease

Adequate grease is very important for the work of the coupling, and it is recommended to check it once a year.Use a dry grease gun to inject grease until there is excess grease overflow in the hole.

The serpentine spring coupling is one of the key components of the belt conveyor driving device to connect the motor and the high and low speed shafts of the reducer. Its reliability has an important impact on the operation of the equipment and the transportation system.The failure of the reed of the serpentine spring coupling is based on the calculation of the static strength, and the reliability design theory is used to study the reed of the serpentine spring coupling. The fatigue strength of the reed and the reed material, size deviation, It is related to stress, which can accurately grasp the material selection and processing method of the reed, and at the same time provide a reliable design method for the serialized design of the reed.

The serpentine spring coupling has the advantages of large transmission load range, stable operation, automatic compensation for installation deviation, and easy maintenance.Under the action of variable load, the reed of the serpentine spring coupling will fatigue and fracture at the contact point.The size of the reed of the serpentine spring coupling is reasonable, which can improve the fatigue strength of the reed and prolong the service life of the reed.The fatigue strength of the serpentine spring coupling reed is designed for reliability, which is in line with the actual working conditions of the belt conveyor, and is closer to reality than the conventional static strength design, improving product design quality, reducing part size, and reducing costs.The commonly used connection and transmission device of the transmission system, its function is to connect the two shafts to rotate together to transmit torque and motion, compensate the relative displacement of the connected two shafts and improve the system.