SEALING UNIT Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: source of magnetic field and pole tips with projections are mounted inside a housing and enclose a cylindrical surface to be sealed. The face surfaces of the projections are conical. The flexible sealing ring members made of magnetically soft material and having antifriction coating are received in working gaps. The cross-section of the sealing members fits to the working gap between the projections of the pole tips and the surface to be sealed. The length of the cross-section of the member along the surface to be sealed is no more than the length of the projection of generatrix of the conical surface of the projection on the generatrix of the surface to be sealed. EFFECT: enhanced reliability. 3 cl, 3 dwg