Magnetic liquid sealing device with permanent magnets arranged in radial direction
A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of debris polluting the inner and outer cavity, rubber easy to wear, aging and failure, etc.
Active Publication Date: 2021-04-30
TSINGHUA UNIV
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Problems solved by technology
[0003] However, due to the particularity that the oscillating shaft can move in any direction, it has always been a technical problem to seal it with high performance and high reliability.
In related technologies, rubber rings are often used as sealing materials for swing shafts, but the rubber ring seals have the following problems: the frictional resistance of the swing shaft is large during operation, the debris generated by rubber wear pollutes the inner and outer chambers, and the rubber is easy to wear or aging, which cannot be realized. zero leakage
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Embodiment Construction
[0029] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0030] Such as figure 1 As shown, the magnetic liquid sealing device with radial arrangement of permanent magnets according to the embodiment of the present invention includes a housing 1 , a swing shaft 2 , a first sealing member 4 and a first permanent magnet 41 .
[0031] The inner surface and the outer surface of the ball head 11 are spherical, the ball head 11 is provided with an opening, the housing 1 is provided with a ball hinge 3, the swing shaft 2 runs through the opening of the ball head 11, and one end of the swing shaft 2 is connected to the opening of the ball head 11. The spherical hinge 3 is connected, and the swing shaft 2 can swing in any direc...
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The invention discloses a magnetic liquid sealing device with permanent magnets arranged in the radial direction. The sealing device comprises a shell, a swing shaft, a first sealing piece and first permanent magnets, wherein the shell comprises a ball head part, a ball hinge is arranged in the shell, the swing shaft can swing with the ball hinge as the center, the first sealing piece is arranged on the outer side of the ball head part; the first sealing piece is connected to the swing shaft, the first permanent magnets are arranged on the side, close to the ball head part, of the first sealing piece, the first permanent magnets are continuously arranged in the circumferential direction of the first sealing piece, and a sealing gap is formed between the first permanent magnets and the shell; and the sealing gap is filled with magnetic liquid for sealing. According to the magnetic liquid sealing device with the permanent magnets arranged in the radial direction disclosed by the invention, magnetic liquid sealing for the swing shaft is achieved, the sealing effect is good, the pressure resistance is high, and the leakage rate is low.
Description
technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic liquid sealing device in which permanent magnets are radially arranged. Background technique [0002] The swing shaft is a shaft that can swing around a fixed point in any direction. It is a key structure in mechanical transmission and actuators. It has important applications in swing cylinders, automotive suspension control arms, engine vector swing nozzles, and universal joints. [0003] However, due to the particularity that the oscillating shaft can move in any direction, it has always been a technical problem to seal it with high performance and high reliability. In related technologies, rubber rings are often used as sealing materials for swing shafts, but the rubber ring seals have the following problems: the frictional resistance of the swing shaft is large during operation, the debris generated by rubber wear pollutes the inner and outer...
Claims
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IPC IPC(8): F16J15/43F16J15/40
CPCF16J15/43F16J15/40
Inventor 李德才李钲皓
Owner TSINGHUA UNIV