The magnetic fluid is connected by filling, and the outer diameter of the shell is connected with the chamber hole with two O rings to maintain a static sealing state. The ferrofluid bushing is rotatable.
When the drive shaft is inserted into the bushing, the two O rings in the sleeve can compress the drive shaft, and the two form a static seal. The rotation of the drive shaft drives the shaft sleeve to rotate together, so as to solve the problem of vacuum sealing of the drive shaft.
It is suitable for vacuum sealing at medium and low speed in room temperature environment.