Concave-convex cross-shaped magnetofluid sealing device
A ferrofluid seal and cross-shaped technology, which is applied to engine seals, mechanical equipment, engine components, etc., can solve problems such as easy magnetic leakage and weak pressure resistance
Pending Publication Date: 2022-05-10
GUANGXI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0004] The present invention aims to provide a concave-convex cross-shaped magnetic fluid sealing device, which can solve the problems of easy magnetic flux leakage and weak pressure resistance performance in the existing magnetic fluid sealing device, and has zero leakage, reliable sealing performance and pressure resistance performance Strong and easy to assemble
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Embodiment 1
[0038] Such as Figure 1-2 As shown, the concave-convex cross-shaped magnetic fluid seal device includes a housing 2, a left pole piece 4, and a right pole piece 5;
[0039] The left pole shoe 4 is arranged on the inner circular surface of the housing 2, and there is a distance between the inner circular surface of the left pole shoe 4 and the outer circular surface of the shaft 1; the outer surface of the right end surface of the left pole shoe 4 is A sleeve ring 9 is arranged on the circumference, a convex ring II11 is arranged on the inner circumference of the right end surface of the left pole shoe 4, and a convex ring I10 is arranged on the right end surface of the left pole shoe 4 between the sleeve ring 9 and the convex ring II11; There is a gap between the inner circular surface of the convex ring II11 and the outer circular surface of the shaft 1;
[0040] The inner surface of the shell 2 is provided with a permanent magnet I12, and the left end surface of the perman...
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The invention aims to provide a concave-convex cross-shaped magnetofluid sealing device. The concave-convex cross-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 IV is formed in the right end surface of the left pole shoe, and a left permanent magnet is arranged in the annular groove IV; the right pole shoe is sleeved on the outer circular surface of the shaft; a convex ring IV and a convex ring III are arranged on the left end surface of the right pole shoe; axial pole teeth corresponding to the left permanent magnet are arranged on the left end faces of the convex ring III and the convex ring IV, the axial pole teeth extend in the radial direction to be close to the right end face of the left pole shoe, a gap is reserved between the axial pole teeth and the right end face of the left pole shoe, and magnetic fluid is arranged in the gap; the concave-convex type cross-shaped magnetic fluid sealing device can solve the problems that an existing magnetic fluid sealing device is prone to magnetic leakage and poor in pressure resistance, and has the advantages of being free of leakage, reliable in sealing performance and high in pressure resistance.
Description
technical field [0001] The invention belongs to the field of mechanical engineering seals, in particular to a concave-convex cross-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. When the magnetic fluid sealing technology is applied in a large-diameter, high-speed and heavy-duty sealing environment, the magnetic fluid in the sealing gap will fail due to excessive centrifugal force. When the seal fails, the amount of magnetic fluid will decrease, the loss will reach a certain amount, and the pressure resistance will decrease. Therefore, reducing centrifugal force on the pressure resistance of magnetic fluid seals is one of the hot issues in current research. [0003] Chinese patent CN108930795A proposes a hybrid concave-convex magnetic fluid sealing device. By adopting a concave-con...
Claims
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Login to View More IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙石淼
Owner GUANGXI UNIVERSITY OF TECHNOLOGY