Function introduction of elastic coupling

Published: 2020-10-28

There are two types of elastic couplings: spiral groove type: spiral groove type elastic coupling is divided into single spiral groove type and double spiral groove type.It has a continuous multi-ring long groove, this kind of coupling has good elasticity and small bearing load.It can withstand various deviations and is most suitable for correction and axial deviation, but its ability to handle eccentricity is relatively poor, because if the spiral groove is bent in two different directions at the same time, it will generate a large internal pressure, which will cause the coupling The knot is damaged prematurely.Although the long spiral groove coupling is easy to bend under various deviations, it has the same effect on the stiffness of the coupling under torsional load.Excessive swing clearance under torsional load will affect the accuracy of the coupling and weaken its overall performance.Application: Due to its poor processing ability, it is most suitable for low torque applications, especially in connecting encoders and other lighter instruments.Parallel grooves: Parallel groove elastic couplings usually have 3-5 grooves to cope with low torque rigidity.Parallel grooves can shorten the length of the groove without impairing its ability to withstand deviations.The short groove can make the coupling torque rigidity and overlap, so that it can withstand considerable torque.

Application location: This performance makes it suitable for light load applications.For example, the connection between the servo motor and the ball screw.However, as the groove size increases, the bearing capacity of the bearing will increase, but in most cases, the bearing can be effectively protected.Increasing the size means increasing the ability to withstand eccentricity.Flexible couplingIt is made up of several groups of partitions (stainless steel plates) interlaced with two half couplings through bolts, and each group of partitions is formed by stacking several pieces.The elastic deformation of the diaphragm compensates for the relative displacement of the two connecting shafts.It is a high-performance metal elastic element winding coupling.No lubrication, compact structure, high elasticity, long service life, no rotation gap, and not affected by temperature and oil pollution.It has the characteristics of acid resistance, alkali resistance and corrosion resistance.The structure is simple and easy to disassemble and assemble.

With the development of industry and science and technology, the application of machinery in modern industry continues to expand, its types continue to increase, and the requirements for its performance are getting higher and higher.In order to improve the efficiency and reliability of mechanical devices.The high quality of diaphragm coupling is very important. Although there are many serialized and standardized couplings at present, due to the wide variety of machinery and their different loads, speeds, and working environments, various performances are required. Different couplings to adapt to different working conditions and usage requirements.

Continuously develop newCoupling, It is very important to improve the original coupling.When making the diaphragm coupling, it is necessary to use CNC milling to mill out the center hole according to the customer's center distance requirements, and then use a drilling machine to drill the adjustment holes and bolts.If the half of the motor is damaged, use another set of the same type of coupling to install it on the spare motor.Save time when replacing motors.The semi-coupling of the diaphragm coupling is connected to the coupling through the diaphragm. The diaphragm is embedded in the hole between the half-coupling and the outer sleeve to transmit torque and bear the radial force, which can compensate the speed reducer The mechanism of the angular displacement between the output shaft and the axis of the reel is similar to that of the elastic pin gear coupling.

When in use, the half coupling is sleeved on the deceleration reduction output shaft, and the outer sleeve is connected with the steel wire rope drum with high-strength bolts, and the torque and radial load are transmitted between the half coupling and the outer sleeve through spherical rollers.The diaphragm coupling has the performance of compensating the relative displacement of the two shafts. It has a compact structure, light weight, high reliability and easy installation. It is used for the connection of the mechanism on the crane trolley.Gear coupling discs are mostly used in small and medium lifting series, with compact structure, good grouping, complex shapes, time-consuming processing, and are unchanged for heavy lifting cranes; open gear drives are mostly used for heavy lifting cranes to further reduce speed and increase The distance between the large motor and the reel.

Diaphragm coupling has a simple structure, exposed gears are inconvenient for lubrication, tooth surfaces are extremely easy to wear, gears fail quickly, the use of gear couplings will increase the distance between the drum axis and increase the structural weight; use statically determinate or super statically determinate shafts A long shaft is required for the connection type, which can shorten the size of the reel shaft, but it is inconvenient to assemble and disassemble, and the reducer cannot be assembled and commissioned separately.When the diaphragm coupling is used for high-speed rotation, the chain and sprocket teeth should be coated with disulfide grease, which has a small amount of damping, cushioning and compensation performance.