What are the causes of improper assembly of serpentine spring coupling

The serpentine spring coupling produced by the machinery manufacturer is a device that can transmit torque through a group or several groups of elastic stainless steel sheets. The relative displacement between the input and output axes is absorbed flexibly by the laminated material. Because it has a high degree of reliability, long life, no lubrication, no maintenance, low noise, failure protection, can keep the same low unbalance, can operate in harsh environment and a series of advantages, so as to be widely used in a variety of large high-speed mechanical load device power transmission

The misalignment of the serpentine spring coupling is one of the main causes of abnormal vibration in rotating machinery. A long distance laminated coupling used on a large fan is taken as the research object, and the coupling and motor are regarded as a motor rotor system. The mechanical model of motor coupling torque caused by misalignment is established. The problem of correct connection between high-speed rotating machinery has been widely paid attention to. The relative displacement of connecting parts of shafting caused by various factors requires flexible coupling to compensate.

As a result, the vibration frequency caused by misalignment of the serpentine spring coupling is an even times of the fundamental frequency of the motor in the mechanical equipment. When the natural frequency of the system approaches or reaches an even times of the fundamental frequency of the motor, resonance will occur, and the vibration caused by misalignment will be amplified to become the main vibration source of the system. Therefore, the natural frequency of the system should be avoided as even times of the fundamental frequency of the motor.