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Sealing method suitable for sealing magnetic liquid under large shaft runout working condition

A magnetic liquid, a relatively advanced technology, applied in the field of magnetic liquid sealing, can solve the problems of pole tooth damage on the pole shoe, reduce sealing performance, reduce reliability, etc., to improve sealing performance, avoid impact, reduce linear speed and calorific value small effect

Inactive Publication Date: 2015-03-25
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some large-scale equipment in these fields, such as large-scale transonic wind tunnels, can not be supported by rolling bearings, but can only be supported by sliding bearings due to the large shaft diameter of the main shaft itself, the heavy load, and the high linear velocity. The radial runout is relatively large, but In the magnetic liquid seal assembly, the seal gap formed by the pole piece and the shaft is usually between 0.1mm and 0.2mm. Therefore, when the magnetic liquid seal is used in this working condition, the radial runout of the main shaft is large, which will cause the magnetic liquid Destruction of the pole teeth on the pole piece in the seal assembly, thereby reducing the sealing performance and reducing the reliability

Method used

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  • Sealing method suitable for sealing magnetic liquid under large shaft runout working condition
  • Sealing method suitable for sealing magnetic liquid under large shaft runout working condition

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Embodiment Construction

[0019] The present invention will be further described with accompanying drawing as specific embodiment:

[0020] A sealing method suitable for magnetic liquid seals under the condition of large shaft runout, the sealing method includes the following steps:

[0021] Step 1 Grinding and cleaning the positioning hole on the right end surface of the shell of the chamber 3 and the positioning stop on the left end surface of the magnetic liquid seal assembly 5;

[0022] Step 2 Install the sealing ring 4 in the sealing groove on the left end surface of the magnetic liquid sealing assembly 5;

[0023] Step 3 Install the magnetic liquid seal assembly 5 on the right end surface of the housing of the chamber 3; the magnetic liquid seal assembly 5 and the right end surface of the housing of the chamber 3 are positioned through the positioning notch; the magnetic liquid seal assembly 5 and the housing of the chamber 3 are connected by bolts fixed;

[0024] Step 4: Push the motor shaft 6...

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Abstract

The invention discloses a sealing method suitable for sealing magnetic liquid under the large shaft runout working condition and belongs to the technical field of mechanical engineering sealing. The sealing method is especially suitable for sealing magnetic liquid under the large shaft radial runout working condition in large equipment, solves the problem that magnetic liquid sealing can not normally work under the large shaft radial runout working condition, and ensures the sealing performance. According to the method, the arrangement position of a coupling is changed, and a flexible coupling is used for connecting, so that radial runout of a motor shaft is not affected, and the sealing interval of the magnetic liquid is met; the dimension of a magnetic liquid sealing assembly is reduced, the quantity of heat generated in the working process is low, and the sealing performance is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering seals, and is particularly suitable for magnetic liquid seals under the working conditions of relatively large radial runout of rotating shafts in some large-scale equipment. Background technique [0002] With the development of aerospace, military and other fields, higher and higher requirements are put forward for sealing. Traditional sealing forms, such as dry gas seals and labyrinth seals, cannot meet the requirements of zero leakage, while magnetic liquid seals have zero leakage. With the advantages of long life and high reliability, it has become the only sealing form that can meet the sealing requirements in these fields. However, some large-scale equipment in these fields, such as large-scale transonic wind tunnels, can not be supported by rolling bearings, but can only be supported by sliding bearings due to the large shaft diameter of the main shaft itself, the heavy load,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/53
CPCF16J15/16
Inventor 李德才王智森王忠忠
Owner BEIJING JIAOTONG UNIV
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