The connection of the coupling and the importance of the serpentine spring material of the serpentine spring coupling

Couplings are mechanical parts used to connect two shafts in different mechanisms so that they can rotate together to transmit torque. They are respectively connected with the driving shaft and the driven shaft.Manufacturing and installation errors, deformation after loading, and the effects of temperature changes, etc., will cause changes in the relative positions of the two shafts, and it is often impossible to determine strict alignment.But there is a certain degree of relative displacement. In heavy-duty power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting.

The coupling has the ability to adapt to a certain range of relative displacements. These displacements should be avoided during assembly, or flexible couplings should be used to compensate for these displacements. Generally, the power machine is mostly connected to the working machine by means of a coupling.The output speed of the electric motor is stable, while the output speed of the internal combustion engine fluctuates greatly.If the load of the working machine has impacts, vibrations, large changes, frequent starts, and reversing, flexible couplings with buffering and vibration absorption capabilities should be selected.Generally, if the two shafts have high requirements for alignment and the rigidity of the shaft is large, a sleeve coupling or flange coupling can be selected; if the alignment of the two shafts is difficult or the rigidity of the shaft is small, the offset of the shaft should be selected Flexible coupling with compensation capability.

The coupling model is selected from the coupling standard according to the transmitted torque, shaft diameter and speed.When the two shafts have relative displacements, additional loads will be caused in the structure.The structure is simple, easy to manufacture, does not require maintenance, and the cost is okay, but it does not have compensation performance.

The coupling has the ability to compensate various relative displacements between the two shafts to be connected, and is further divided into non-elastic element flexibility and flexibility, which can compensate the relative displacement of the two shafts, but because there is no elastic element, it cannot buffer and reduce vibration. .The elastic element is flexible. Because of the elastic element, it can not only compensate the relative displacement between the two shafts, but also has the ability to buffer and reduce vibration.

The selection of the material of the snake spring for the serpentine spring coupling is very important, because in the entire transmission process, the torque is transmitted by the snake spring, and the elastic variable generated when the snake spring transmits the torque makes the mechanical system obtain a good damping effect. , So as to avoid the occurrence of resonance phenomenon, once the snake spring breaks and other damages, the entire transmission part can not work normally, and because it works under dynamic load environment conditions, the main material of the snake spring should have a high yield. degree.Spring steel has good elasticity, is not easy to cause plastic deformation when subjected to heavy loads, has a good degree of fatigue, has a long service life under repeated loads, and has sufficient toughness to prevent it under impact Suddenly broken.

The serpentine spring coupling is composed of two halves of the coupling and a serpentine spring. Each half of the coupling has a spring groove. In actual work, the spring is embedded in the spring groove to complete the torque transmission. The serpentine spring coupling There is no inlay between them in the radial direction, so that when the equipment is moving, only the serpentine spring can be removed, without the need to move the equipment axially, which does not increase the maintenance of the serpentine spring coupling and shortens the maintenance time.After the serpentine spring coupling is used in the four sets of drives, the operation of each coupling is good.

There has not been a situation where the production is affected by the problem of the serpentine spring coupling, and during the process of changing the liquid viscous soft starter, there is no need to move the motor and other equipment, which shortens the maintenance time and reduces the degree of labor.Under the same torque, the torsion angle is inversely proportional to the stiffness. The torsion angle of the serpentine spring coupling is smaller, and its torsion stiffness is greater than that of the non-drum serpentine spring coupling.Due to the increase in torsional stiffness, when the drum-shaped serpentine spring coupling transmits torque, the vibration caused by it will also be weakened during operation.The serpentine spring coupling is easily damaged during use. The quality of the spring directly determines the service life of the coupling.