Mixed E-shaped magnetofluid sealing device

Abstract

The invention aims to provide a mixed E-shaped magnetofluid sealing device. The mixed E-shaped magnetofluid sealing device comprises a shell, a left pole shoe and a right pole shoe, a sleeve ring is arranged on the outer circumference of the right end surface of the left pole shoe, a convex ring II is arranged on the inner circumference of the right end surface of the left pole shoe, and a convex ring I is arranged on the right end surface of the left pole shoe between the sleeve ring and the convex ring II; an annular groove V is formed in the right end surface of the left pole shoe, and a left permanent magnet is arranged in the annular groove V; the outer circle face of the shaft is sleeved with the right pole shoe, protruding rings III are arranged at the positions, corresponding to the annular grooves III and the annular grooves V in the annular grooves IV, of the left end face of the right pole shoe, the left ends of the two sets of protruding rings III extend towards the annular grooves V. Gaps are reserved between the left end faces of the two sets of protruding rings III and the right circle face of the left permanent magnet. And magnetic fluid is arranged in the gap. According to the mixed E-shaped magnetofluid sealing device, the problems that an existing sealing device is prone to magnetic leakage and poor in pressure resistance can be solved, and the mixed E-shaped magnetofluid sealing device can be applied to the fields of high speed, heavy load and the like.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and in particular relates to a hybrid E-shaped magnetic fluid seal device. Background technique [0002] Ferrofluid is a new type of intelligent material composed of magnetic nanoparticles, carrier liquid, and surfactant. Sealing is one of the most mature fields for its application. Under the conditions of high-speed shafts or low-speed shafts with shaft diameters greater than 500mm, such as ship main shafts, which require a large seal gap, due to the action of centrifugal force, the seal will fail. When the seal fails, the amount of magnetic fluid will decrease, the loss will reach a certain amount, and the pressure resistance will decrease. , poor sealing performance. Therefore, reducing centrifugal force on the pressure resistance of ferrofluid seals is one of the hot issues in current research. [0003] Chinese patent CN108930795A proposes a hybrid concave-convex magnetic fluid s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid E-shaped magnetic fluid sealing device, which can solve the problems of easy magnetic flux leakage and weak pressure resistance existing in the existing sealing device, and can be applied in the fields of high speed and heavy load, etc.

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