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Rotation shaft combined sealing device

A combination of sealing and rotating shaft technology, which is applied in the fields of military industry, shipbuilding, navigation, and mechanical sealing, to achieve the effects of high reliability, convenient installation and low installation accuracy

Inactive Publication Date: 2010-08-11
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to seal the liquid under strict sealing performance requirements such as low temperature, no pollution, and no leakage, and to provide a combined sealing device applied to rotating machinery

Method used

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Embodiment Construction

[0012] The present invention will be further described in conjunction with the accompanying drawings. Such as figure 1 shown.

[0013] A rotary shaft combined sealing device is composed of a tapered spiral groove seal and a magnetic liquid seal.

[0014] The combined sealing device includes: shaft sleeve 1, rubber sealing ring 3, circular ring 5, left bearing 6, left magnetic isolation ring 7, magnetic liquid sealing assembly, right magnetic isolation ring 11, right bearing 12, screw 13, first end Cover 14, second end cover 15, screw 16, right rubber sealing ring 17, outer cover 18, left rubber sealing ring 19, outer cover 18.

[0015] The magnetic liquid sealing assembly is a left pole piece 8, a permanent magnet 9, and a right pole piece 10 glued together in sequence. The rubber sealing ring 17 is installed in the annular groove on the outer surface of the right pole piece 10 , and the left rubber sealing ring 19 is installed in the annular groove on the outer surface of ...

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Abstract

The invention relates to a rotation shaft combined sealing device. A circular ring (5), a left bearing (6), a left magnetic isolation ring (7), a magnetic liquid sealing assembly, a right magnetic isolation ring (11) and a right bearing (12) of the device are sequentially ranged in an outer sleeve (18), after magnetic liquid is uniformly injected onto pole teeth of a pole shoe arranged in the magnetic liquid sealing assembly, a shaft sleeve is arranged in inner holes of the parts, a second end cover (15) is fixed on the outer sleeve through a screw (16), the outer ring of the right bearing is tightly pressed, then, the first end cover (14) is fixed on the shaft sleeve (1) through a screw (13), and the inner ring of the right bearing is tightly pressed for realizing the sealing of the magnetic liquid. The outer surface of the left end of the shaft sleeve is a conical surface, the inner hole of the left end of the outer sleeve is a conical hole with the same conicity as the left end of the shaft sleeve, a spiral groove is processed in the conical hole, and the conical surface of the outer side of the left end of the shaft sleeve is matched with the spiral groove processed in the conical hole of the left end of the outer sleeve for realizing the conical spiral sealing. The device has the advantages of long service life, reliable sealing, no pollution and the like.

Description

technical field [0001] The invention relates to a combined sealing device for a rotating shaft, which belongs to the field of mechanical sealing and is especially suitable for sealing liquids in the fields of military industry, ships, and navigation. technical background [0002] At present, there are many and mature studies on gas seals in rotating machinery, but relatively few studies on liquid seals, especially under harsh conditions such as low temperature, no pollution, and no leakage. In recent years, packing seals are often used for liquid sealing in rotating machinery. Although the packing seal has the advantages of simple structure and convenient operation, the friction and wear between the packing and the rotating parts are large, the power consumption is high, and the sealing is not very good. Reliable, and in the current situation, it is difficult to completely solve the problem of liquid leakage by applying some sealing methods alone. Therefore, improving the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才杨小龙
Owner BEIJING JIAOTONG UNIV
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