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Magnetic liquid sealing device capable of microwave heating

A technology of magnetic fluid and sealing device, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of shaft speed reduction and safety performance reduction, and achieve the effect of ensuring safety performance

Inactive Publication Date: 2011-07-20
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This torque increase causes the shaft speed to decrease
In addition, the increase in torque will also lead to a decrease in the safety performance of the shaft

Method used

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  • Magnetic liquid sealing device capable of microwave heating
  • Magnetic liquid sealing device capable of microwave heating
  • Magnetic liquid sealing device capable of microwave heating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described with accompanying drawing as specific embodiment:

[0019] A magnetic liquid seal with its own microwave heating, see figure 1 , the sealing device includes: a metal sleeve 1, a first bearing 3, a first rubber sealing ring 4, a first pole shoe 5, a permanent magnet 6, a second pole shoe 7, a second rubber sealing ring 8, a second bearing 9, Magnetic fluid 10, end cover 11, transmission shaft 12, screw 13. Connections between the parts:

[0020] The first rubber sealing ring 4 is embedded in the concave groove in the inner hole of the first pole shoe 5, and the second rubber sealing ring 8 is embedded in the concave groove in the inner hole of the second pole shoe 7, see figure 1 , 2 .

[0021] The first bearing 3 , the first pole shoe 5 with the first rubber sealing ring, the permanent magnet 6 , the second pole shoe 7 with the second rubber sealing ring, and the second bearing 9 are successively installed on the shaft...

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Abstract

The invention relates to a magnetic liquid sealing device capable of microwave heating, belonging to the field of mechanical engineering magnetic liquid sealing. A first bearing (3) which constitutes the sealing device, a first pole shoe (5) with a first rubber sealing ring, a permanent magnet (6), a second pole shoe (7) with a second rubber sealing ring and a second bearing (9) are sequentially installed on a shaft shoulder (14) of a transmission shaft, and magnetic liquids are poured in, thus a magnetic liquid sealing assembly is formed by the connection, and is installed on a step (15) of the inner hole of a metal sleeve (1); and an end cover (11) is fixed on the metal sleeve (1) through the threaded connection of a screw (13) and the metal sleeve (1). The transmission shaft (12) is made of a carbon fiber / epoxy resin composite material, a boron fiber / epoxy resin composite material or a glass fiber / epoxy resin composite material; and the problems that the increment in the moment of torsion of the transmission shaft and the safety performance reduction of the transmission shaft caused by the increment of magnetic liquid viscocity under low temperature are solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering magnetic liquid sealing, and is particularly suitable for a magnetic liquid sealing device on a radar working in a low-temperature environment. technical background [0002] In practice, the ambient temperature around some radars is very low, and at very low operating temperatures, the viscosity of the magnetic fluid will increase, resulting in an increase in the torque of the shaft, for example: the torque is 1.6kg m at normal temperature, at - At 40°C, the torque will reach 7kg·m. This increase in torque results in a decrease in shaft speed. In addition, the increase in torque will also lead to a decrease in the safety performance of the shaft. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the increase of the shaft torque caused by the increase of the viscosity of the magnetic liquid at low temperature, improve the safety o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43F16J15/54
Inventor 李德才王凡
Owner BEIJING JIAOTONG UNIV
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