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Low-temperature large diameter magnetic liquid sealing arrangement

A magnetic fluid and sealing device technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem that magnetic fluid sealing cannot be applied to low temperature and large diameter conditions, and achieves reduced rotational torque, low leakage rate, and simple assembly method. Effect

Inactive Publication Date: 2006-03-15
BEIJING JIAODA INNOVATION TECH CENT
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing magnetic liquid sealing method cannot be applied to low-temperature and large-diameter conditions. Therefore, a low-temperature large-diameter magnetic liquid sealing device is provided so that the rotational torque of large-diameter seals can be reduced from 7kgm under low temperature conditions. To 3kgm, to meet the actual needs

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  • Low-temperature large diameter magnetic liquid sealing arrangement
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  • Low-temperature large diameter magnetic liquid sealing arrangement

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Embodiment Construction

[0013] The present invention will be further described with accompanying drawing as specific embodiment:

[0014] The low-temperature large-diameter magnetic liquid sealing device includes: small end cover 1, bearing 2, pole shoe 3, jacket 4, shaft sleeve 10, bearing 7, pole shoe 6, permanent magnet 5, magnetic liquid 12, rubber sealing ring 15, and adjustment pad Sheet 8, large end cap 9, screw 14, screw 19. When installing, firstly insert the rubber sealing ring 15 into the pole piece 3 and the pole piece 6 respectively, and then place the bearing 2, the pole piece 3, the permanent magnet 5, the pole piece 6, and the bearing 7 against the right side of the inner boss of the casing 4 in sequence; After the magnetic liquid 12 is evenly injected into the sealing teeth 20 on the shaft sleeve 10, the bearing 2, the pole shoe 3, the permanent magnet 5, the pole shoe 6 and the inside of the bearing 7 installed above are loaded into, and the small end cover 1 is screwed with the scr...

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Abstract

The invention is a low-temperature large-diameter magnetic liquid sealing device, including: small-end cover, jacket, shaft case, bearing, pole boot, PM, magnetic liquid, rubber seal ring, adjusting pad and big-end cover. The shaft case is installed inside the bearings, pole boots and PM, the small-end cover is fixed on the shaft case by bolt; the seal teeth holding magnetic liquid are designed on the outer cylindrical surface of the shaft case; the shape parameters of the seal teeth: width 0.5mm and height 2.5mm. The carrier liquid of the magnetic liquid is high-grade kerosene, silicate or diester, where the size of the magnetic particles is less than 5 nm. The device can implement sealing of shaft diameter greater than 160mm at -40 deg.C and reduce torque, the leakage rate lower than 10 to the power -11 pal.cu 3 / s, the service life long and the assembling method simple.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering sealing, and is particularly suitable for vacuum sealing or positive pressure sealing with a sealing shaft diameter greater than 160mm at a temperature of -40C in the fields of military industry, ships, navigation, aerospace and the like. Background technique [0002] Magnetic liquid is a new type of functional material that has emerged with the development of science and technology. It has the magnetizable properties of magnetic materials and the flow properties of liquids. Since Papell first prepared and applied magnetic liquid when studying the dynamic sealing of space suits in the 1960s, it has achieved in-depth research day and night in a short period of more than 30 years of development, and has been widely used in machinery and electronics. , aviation, medicine and many other fields, among which the magnetic liquid rotary shaft seal is more mature, and many companies have pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/43
Inventor 李德才兰惠清何新智廖平崔海蓉炊海春许海平
Owner BEIJING JIAODA INNOVATION TECH CENT
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