For some high-speed rotating shaft systems or shaft systems with high heat generation and significant differences in thermal expansion on both sides, if zero deviation alignment is used during cold installation, there will be significant misalignment between the two shafts during actual operation. In this case, the coupling manufacturer measures or calculates the difference in thermal expansion at both ends of the working state, and reserves this difference during cold adjustment to ensure normal alignment during hot operation.

To ensure the safety of the shaft system during hot operation, there are various methods for aligning the two shafts. Different methods can be used according to the working speed of the shaft system and the type of coupling. The rigidity of the watch stand directly affects the accuracy of the measurement results, which in turn affects the accuracy. Couplings need to take various structural measures to compensate for various deviations.

The requirement for the neutrality of the two axes is very high. If there is relative displacement between the two axes, it will cause additional loads and severe wear on the coupling and bearings, seriously affecting the normal operation of the shaft and bearings; Two half couplings with flanges are connected to the two shafts using keys, and then the two half couplings are connected together with bolts to transmit motion and torque. The half couplings are connected with ordinary bolts;

The coupling has good buffering and shock-absorbing performance when the speed is unstable, without the need to move the half coupling, and has a definite compensation for the relative deviation of the two shafts and damping and buffering performance. The elastic sleeve works under compression deformation. Due to the thin thickness of the elastic sleeve, the elastic deformation is limited. The coupling relies on locking force to generate friction torque on the contact surface, and compresses the rubber elastic sleeve to transmit torque.