We all know that the drum gear coupling is a kind of transmission parts in the mechanical equipment used by every mechanical manufacturer. The coupling transmission parts are used to connect two shafts so that they rotate together to transfer torque and movement. It has a wide range of applications in various fields. Because the two connected axes can not be aligned, and the misalignment is caused by the mechanical manufacturing error, installation error, deformation after load and temperature change.

The drum gear coupling used in every kind of mechanical equipment needs to be carried out. It is required that the transmission part of the coupling should not only transmit torque and motion, but also absorb the axial, angular and radial deviations generated by the two-axis installation process. , so that the equipment can operate normally. The development and evolution of crown gear couplings has always been around this goal. There are many forms of couplings, which are divided into three categories according to their functions and principles: ordinary couplings, safety couplings, and special couplings. The safest thing is to add a safety mechanism on the basis of ordinary couplings. Once the torque is overloaded, it can interrupt the transmission or limit the transmission of torque, so as to protect the important parts of the machine from damage. Special couplings refer to couplings that are connected by non-mechanical means, such as couplings for hydraulic transmission, pneumatic transmission or magnetic transmission.

We all familiar and widely used drum gear coupling is belonging to this category, the coupling transmission is used in high speed and high power coupling is an important choice. This type of coupling needs to provide lubrication due to the relative movement between components, and its compensation capacity is limited by the relative sliding speed and lubrication conditions of the removable elements. Such as gear coupling tooth surface relative sliding speed should not be greater than 0.12m/s, so in high speed heavy load, the coupling angular compensation ability is very small. In order to improve this compensation ability, gear coupling is often made into drum teeth, the structure is more complex, and once the lubrication problems will greatly reduce its use effect and life, which promotes the development and use of dry coupling.