A hybrid magnetic source magnetic fluid sealing device
A magnetic fluid sealing and hybrid technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problem of low pressure resistance, improve pressure resistance and sealing reliability, increase magnetic field strength, and expand safety The effect of working range
Active Publication Date: 2020-05-05
GUANGXI UNIVERSITY OF TECHNOLOGY
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[0005] The purpose of the present invention is to provide a hybrid magnetic source magnetic fluid sealing device, so as to solve the problem of low pressure resistance existing in the existing sealing device, so that the sealing technology can be successfully applied in the fields of high speed and heavy load
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] see figure 1 , a hybrid magnetic source magnetic fluid sealing device, including a shaft 1, a housing 2, a pole piece 6, a magnetic fluid and a first permanent magnet 8, the shaft 1 passes through and extends beyond the two ends of the housing 2, so The inner surface of the casing 2 is provided with at least two pole pieces 6, and a ring-shaped first permanent magnet 8 is arranged between two adjacent pole pieces 6. The pole pieces are in a ring-shaped structure, and the shaft passes through The inner hole of the pole shoe 6, the inner circular surface of the pole shoe 6 has annular radial pole teeth 11 protruding toward the shaft 1, and the shaft 1 is provided at a position corresponding to the radial pole teeth 11 There is an annular second permanent magnet 9, there is a sealing gap between the second permanent magnet 9 and the radial pole teeth 11,...
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The invention discloses a mixed type magnetic source magnetic fluid sealing device. The mixed type magnetic source magnetic fluid sealing device comprises a shaft, a shell, pole shoes, magnetic fluidand permanent magnets; the shaft penetrates through the two ends of the shell and extends outside the two ends of the shell; the inner surface of the shell is provided with the at least two annular pole shoes, one annular first permanent magnet is arranged between every two adjacent pole shoes, and the inner circular face of each pole shoe is provided with annular radial pole teeth protruding towards the shaft; the positions, corresponding to the radial pole teeth, of the shaft are provided with the annular second permanent magnets, and sealing gaps are formed between the second permanent magnets and the radial pole teeth; the first permanent magnets are axial magnetization type permanent magnets, and the second permanent magnets are radial magnetization type permanent magnets; magnetic lines of force of every two adjacent first permanent magnets and magnetic lines of force of every two adjacent second permanent magnets are opposite, and magnetic poles of each first permanent magnet and the corresponding second permanent magnet which face towards the same pole shoe are opposite. According to the mixed type magnetic source magnetic fluid sealing device, the magnetic fluid sealing anti-pressure capability is greatly improved, and the problem that an existing sealing device cannot meet the high-sealing-performance requirement under the high speed and heavy load condition and otherspecial working conditions.
Description
technical field [0001] The invention belongs to the field of mechanical engineering sealing, and in particular relates to a hybrid magnetic source magnetic fluid sealing device capable of maintaining good sealing performance under high-speed and heavy-load working conditions. Background technique [0002] In the magnetic fluid sealing device, the performance of the magnetic fluid will gradually fail with the increase of the sealing gap, so the pressure resistance of the sealing device will decrease accordingly. Although the current magnetic fluid sealing technology is used in large diameter, high speed and heavy load sealing However, improving the pressure resistance of ferrofluid seals under large gaps is still a problem that needs to be solved. [0003] One of the methods to improve the pressure resistance performance of magnetic fluid seals under large gaps is to improve the magnetic fluid seal structure, such as the sealing device described in reference 1 (patent publica...
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IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙郝付祥陈帆孙彭谢国进何美丽
Owner GUANGXI UNIVERSITY OF TECHNOLOGY