Magnetofluid sealing structure
A ferrofluid seal and permanent magnet technology, which is applied to engine seals, engine components, mechanical equipment, etc., can solve the problems of unfavorable sealing structure lightweight, difficult to achieve vacuum sealing, and seal failure, so as to facilitate equipment lightweight, Effect of improving pressure resistance and enhancing sealing performance
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[0033] Such as figure 1 As shown, a magnetic fluid sealing structure includes a hollow housing 2 and a rotating shaft 1 arranged in an inner cavity of the housing 2, and the rotating shaft 1 and the housing 2 are assembled and connected by a bearing.
[0034] There are multiple steps on the outer surface of the rotating shaft 1, and the height difference between two adjacent steps is 1 to 5 mm.
[0035] Two second permanent magnets 6 are provided in the radial direction between the outer surface of the rotating shaft 1 and the inner wall of the housing 2, and the second permanent magnets 6 are axially magnetized permanent magnet rings. Each second permanent magnet 6 is provided with pole shoes 5 on both sides, and each pole shoe 5 is arranged directly opposite to one of the first steps. There are three pole shoes 5, and two second permanent magnets 6 are arranged between two adjacent pole shoes 5. The number of steps provided on the outer surface of the rotating shaft 1 is the sa...
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