A magnetic liquid sealing device suitable for high linear speed rotating conditions

Abstract

The invention discloses a magnetic liquid sealing device suitable for high-linear-speed rotating working conditions, belongs to the field of sealing of mechanical engineering, in particular, is suitable for sealing under high-linear-speed rotating working conditions, and can solve the problems of weak pressure resistance and lower reliability when the linear speed in the rotating shaft starting process of a traditional magnetic liquid centrifugal sealing structure is lower. The device consists of a rotating shaft (1), a shell (2), a left bearing (3), a first separation magnetic ring (4-1), a first pole shoe (5-1), a first sealing ring (6-1), a first permanent magnet (7-1) and the like. When the rotating shaft (1) rotates at low linear speed, an axial magnetic liquid sealing module achieves a sealing effect; and under the condition of sufficient axial space, the number of axial magnetic liquid sealing teeth can be increased, so that the pressure resistance is improved, the sealing reliability is improved, and the problem of weak pressure resistance in the rotating shaft starting process of the traditional magnetic liquid centrifugal sealing structure is solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and is especially suitable for high linear speed rotating working conditions. Background technique [0002] Magnetic liquid seals have achieved extensive and irreplaceable roles in many high-tech fields such as aerospace, electronic technology, mechanical chemistry, energy metallurgy, etc., due to their excellent characteristics such as zero leakage, no solid friction, no mechanical friction, low energy consumption, and long life. The application of low linear speed rotation in various fields has been relatively mature, and is developing towards the sealing direction of high linear speed rotation. As the diameter of the rotating shaft becomes larger and the rotational speed becomes higher, the higher the linear velocity of the sealing part, the greater the centrifugal force on the magnetic liquid. The existing magnetic liquid centrifugal seal structure can use the high linear velocity ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing magnetic liquid centrifugal seal structure has a limited radial space, the number of sealing teeth of the centrifugal seal is small, and the magnetic liquid seal has insufficient pressure resistance when the linear velocity is low during the start-up process of the rotating shaft.

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