Stepped shaft type magnetofluid sealing device
A magnetic fluid seal and stepped shaft technology, which is applied in the field of mechanical engineering seals, can solve the problems of low pressure resistance, and achieve the effects of enhancing pressure resistance, expanding safe working range and reducing losses.
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] see figure 1 , a stepped shaft magnetic fluid sealing device, including a shaft 1, a housing 2, a sealing ring 7, a pole piece 6, a magnetic fluid and a permanent magnet 8, the shaft 1 passes through and extends beyond both ends of the housing 2, The shaft 1 includes a stepped shaft part located in the housing 2. The middle step diameter of the stepped shaft part is the largest, and the diameters of the steps on the left and right sides decrease successively. The stepped shaft part has a plurality of shafts parallel to the The cylindrical side 9 of the axis of the shaft 1 and a plurality of conical side surfaces 10 perpendicular to the axis, the inner surface of the housing 2 is provided with at least two pole shoes 6, and a ring is provided between two adjacent pole shoes 6 shaped permanent magnet 8, the pole piece 6 is an annular structure, the seal...
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