An anti-sway magnetohydrodynamic sealing device

Abstract

This utility model relates to the field of sealing technology and discloses an anti-sway magnetic fluid sealing device, including a bushing, a sealing assembly, and a connecting plate. The bushing is fitted onto a rotating shaft and rotates synchronously. The stationary and rotating parts of the sealing assembly are fitted onto the outside of the bushing along the axis of the rotating shaft, forming a magnetic fluid sealing structure. The rotating part rotates with the bushing. One side of the connecting plate is connected to the equipment cavity, and the other side forms radial and axial gap cavities with the stationary sealing part through a positioning assembly, allowing the sealing assembly to sway with the rotating shaft. This utility model uses the rotating shaft as the sole positioning element. Through the non-rigid connection and gap between the connecting plate and the equipment cavity, the stationary sealing part can move freely within the gap when the rotating shaft sways or moves, avoiding additional load on the bearing. This solves the problem of bearing overload failure and short lifespan caused by equipment sway in traditional magnetic fluid seals.

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