Magnetic liquid reciprocating sealing device
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 affecting the sealing performance and service life of the magnetic liquid reciprocating sealing device, and achieve the effect of improving the sealing effect and service life
Active Publication Date: 2020-12-22
TSINGHUA UNIV
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Problems solved by technology
[0003] However, in the magnetic liquid reciprocating sealing device, due to the adhesion phenomenon between the magnetic liquid and the reciprocating shaft, the reciprocating shaft usually takes the magnetic liquid away from the seal during the movement process, resulting in the magnetic liquid in the sealing gap increasing with the working time. gradually decrease, which in turn affects the sealing performance and service life of the magnetic liquid reciprocating sealing device
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[0027] 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.
[0028] Such as Figure 1-Figure 3 As shown, the magnetic fluid reciprocating seal device according to the embodiment of the present invention includes a housing 100 , a reciprocating shaft 200 , a power supply device (not shown in the figure) and a magnetic seal 300 .
[0029] Such as figure 1 and image 3 As shown, the housing 100 includes an outer peripheral wall 101 and a cavity 140 surrounded by the outer peripheral wall 101 , the cavity 140 includes a sealed cavity 150 filled with magnetic liquid.
[0030] Such as figure 1 and figure 2 As shown, the reciprocating shaft 200 passes through the housing 100 along its axial direction, and the reciprocating ...
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The invention discloses a magnetic liquid reciprocating sealing device. The magnetic liquid reciprocating sealing device comprises a shell body, a reciprocating shaft, a power-up device and a magneticsealing piece, wherein the shell body is provided with a sealing cavity; the sealing cavity is filled with magnetic liquid; the reciprocating shaft is arranged on the shell body in a penetrating manner; the power-up device is connected with the reciprocating shaft; the power-up device is used for charging an axial current into the reciprocating shaft to generate a magnetic field which is weakenedfrom inside to outside in the radial direction of the reciprocating shaft; the magnetic sealing piece is located in the sealing cavity, and arranged on the reciprocating shaft in a sleeving manner; asealing gap is formed between the inner circumferential surface of the magnetic sealing piece and the outer circumferential surface of the reciprocating shaft; and the magnetic liquid is suitable forbeing attracted into the sealing gap under the magnetic acting force. According to the magnetic liquid reciprocating sealing device, the magnetic liquid is supplemented into the sealing gap through the magnetic field, so that the sealing effect can be improved, and the service life can be prolonged.
Description
technical field [0001] The invention relates to the technical field of sealing, in particular to a magnetic liquid reciprocating sealing device. Background technique [0002] Magnetic liquid sealing technology has the advantages of zero leakage, no wear, long life, and convenient maintenance. It has been widely used in different sealing occasions in military and civilian industries. [0003] However, in the magnetic liquid reciprocating sealing device, due to the adhesion phenomenon between the magnetic liquid and the reciprocating shaft, the reciprocating shaft usually takes the magnetic liquid away from the seal during the movement process, resulting in the magnetic liquid in the sealing gap increasing with the working time. And gradually reduce, and then affect the sealing performance and service life of the magnetic liquid reciprocating sealing device. Contents of the invention [0004] For this reason, the embodiment of the present invention proposes a reciprocating ...
Claims
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Login to View More IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才陈思宇李艳文
Owner TSINGHUA UNIV