Standby bearing device of magnetic suspension bearing system

Abstract

The invention relates to the technical field of bearing protection, in particular a standby bearing device of a magnetic suspension bearing system. The magnetic suspension bearing system comprises: ahousing, a rotor in the housing, magnetic bearings and standby bearing devices. The standby bearing devices are matched with the magnetic bearings, and are backups for the magnetic bearings, and the standby bearing devices are used for bearing the rotor and arranged on the two sides of the rotor. The standby bearing device comprises a standby bearing and a damping assembly, wherein the inner sideof the damping assembly is connected with the standby bearing, the outer surface of the damping assembly is matched with the housing, the damping assembly comprises a piezoelectric damper, the piezoelectric damper comprises a damping element and a resistor element connected with the damping element in series, and the damping element is made of piezoelectric materials. According to the standby bearing device, vibration and impact energy of the standby bearing is converted into electric energy through the piezoelectric damper, the electric energy is consumed by the resistor element, and therefore, the purpose of guaranteeing reliable operation of the standby bearing is achieved.

Description

technical field [0001] The invention relates to the technical field of bearing protection, in particular to a backup bearing device of a magnetic suspension bearing system. Background technique [0002] The magnetic suspension bearing system must be equipped with corresponding spare bearings, so that when the magnetic suspension bearing fails, such as power failure, overload and control system instability, it can continue to support the shafting and maintain stability, and at the same time quickly decelerate the machine to achieve The role of ensuring safe shutdown. [0003] The spare bearing usually does not work, and is only used when the magnetic suspension bearing fails, so the required life is limited. Therefore, its designed bearing capacity and rotational speed are much higher than ordinary contact bearings that can withstand continuous operation. limit. In addition, since the shafting speed of the magnetic suspension bearing system is much higher than the limit tha...

AI Technical Summary

Problems solved by technology

At the same time, since the magnetic bearing has no physical contact with the shafting in the working state, there is a larger gap between the spare bearing and the shafting, and when the shafting falls onto the spare bearing, it will cause a transient spike impact on the spare bearing

In addition, since the backup bearing needs to keep the shafting stable until it stops, it may experience multiple and different flexible and rigid natural frequency modes of the system during the deceleration process of the shafting. When passing through these speeds, the resonance energy will affect the backup Great damage to bearings

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