Rotor dynamics analysis and experimental research of flywheel shafting with a single point flexible support

The flywheel energy storage technology is a new type of conversion and storage for electric energy, and it is also a research hotspot of energy field in the world. There are a large number of studies on dynamic characteristics of energy storage flywheel in recent years. The flexible support with a single point has small load-carrying ability but very low friction loss, which is appropriate to be used in small flywheel system. For this reason, a flywheel shafting with a single point flexible support was established. By means of the Lagrangian equation, the special dynamic model of the flywheel rotor-bearing-damper was built to calculate critical speed, modal shape and modal damping ratio with different speed. The results show that shafting is stable, simple and efficient. And the experimental result is in agreement with the theoretical one.