An anti-leakage magnetic fluid sealing structure
A magnetic fluid sealing and anti-magnetic leakage technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of reduced pressure resistance performance of magnetic fluid seal, insufficient sealing pressure resistance performance, and small flow resistance of magnetic fluid. , to reduce the loss of magnetic fluid, improve the pressure resistance of the seal, and increase the flow resistance.
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[0030] Take the magnetic fluid seal of the rotating shaft as an example, such as Figure 1-2 As shown, an anti-leakage magnetic fluid sealing structure includes a hollow shell 2, one end of which is closed and the other end is open. A through hole is opened in the center of the closed end face of the housing 2 . It also includes a shaft 1 penetrating from the through hole to the inner cavity of the housing 2 .
[0031] In the space between the outer surface of the shaft 1 and the inner wall of the housing 2, a plurality of annular pole pieces 3 are axially spaced apart. An axially magnetized permanent magnet ring 7 is sandwiched between two adjacent pole pieces 3 . The outer circle of the axially magnetized permanent magnet ring 7 and the pole shoe 3 abuts against the inner wall of the housing 2 . The polarities of the magnetic poles of two adjacent axially magnetized permanent magnet rings 7 are opposite.
[0032] A shaft sleeve 6 sleeved on the shaft 1 is arranged betwee...
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