Advantages of Oldham Coupling and Flange Coupling

Published: 2017-12-15

There are many types of couplings, andOldham coupling And flange couplings are two types of them. In what situation is the cross slider used?What is the appropriate size of the flange coupling?What is the scope of use of flange couplings?

The advantages of the Oldham coupling: It consists of two half couplings with grooves on the end faces and a middle disc with convex teeth on both sides.Because the convex teeth can slide in the groove, the relative displacement between the two shafts during installation and operation can be compensated.The material of this coupling part can be 45 steel, and the working surface needs to be heat treated to increase its hardness. The flange coupling is a rigid coupling, which uses ordinary flat keys to separate two flanged half couplings. Connect with the two shafts, and then use bolts to connect the two half couplings into one body to transmit movement and torque.

This coupling has two main structural forms:

①Relying on reamed holes and bolts to realize the two-axis centering and relying on the bolt rod to bear extrusion and shear to transmit torque;

②It is centered by matching the convex shoulder on one half coupling with the groove on the other half coupling.The bolts connecting the two half couplings can be used with ordinary bolts of grade B, and the torque is transmitted by the frictional moment of the joint surface of the two half couplings.

The material of the flange coupling can be gray cast iron or carbon steel, and cast steel or forged steel should be used under heavy load or when the peripheral speed is greater than 30 m/s.

Advantages: However, due to its simple structure, low cost, and large torque transmission, it is often used when the rotation speed is low, no impact, the shaft has high rigidity, and the neutrality is good.Flange coupling (also known as flange coupling) is to use bolts to connect two flange (flange) disc type half couplings. The two half couplings are respectively connected with two shafts by keys to realize two shafts. Connect, transmit torque and movement.Flange coupling has simple structure, convenient manufacturing, low cost, easy work, assembly and disassembly, and maintenance, large transmission torque, and high centering accuracy of two shafts. It is generally used for stable load, high speed or Shaft transmission with high transmission accuracy requirements.Flange couplings do not have radial, axial and angular compensation performance. If they cannot be connected to the centering accuracy of the two shafts during use, it will reduce the service life, transmission accuracy and transmission efficiency of the coupling, and cause vibration and noise.

The bolts on the flange can all be bolts for reaming holes, or half of them can be bolts for reaming holes, and the other half can be ordinary bolts.