Magnetic fluid sealing device with axial through-hole structure magnetic source
A magnetic fluid sealing, axial through-hole technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of permanent magnet fracture, difficult processing, weakened pressure resistance of magnetic liquid sealing devices, etc., to reduce leakage. magnetic effect
Active Publication Date: 2022-05-27
BEIJING JIAOTONG UNIV +1
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Problems solved by technology
[0003] In some sealing occasions, in addition to the need to seal the airtight cabin and the external environment, there are also problems with the addition of magnetic fluid, data collection, positioning, and communication. Referring to the field of mechanical engineering, the first method that comes to mind is to process the connection on the permanent magnet. through holes, but because the through hole structure on the permanent magnet will weaken the pressure resistance of the magnetic liquid sealing device to a certain extent, and the commonly used NdFeB magnet is a brittle and hard material that is difficult to process, and its excessive processing will easily lead to Permanent magnets break, so magnetic fluid seals have never been constructed like this
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with the accompanying drawings.
[0016] like figure 1 As shown, the magnetic fluid seal with an axial through-hole structure magnetic source includes a housing, a left pole shoe ring, a right pole shoe ring and a permanent magnet; the left pole shoe ring and the right pole shoe ring and the permanent magnet are arranged on the inner wall of the casing, and there is a space between the inner circular surface of the left pole shoe ring and the right pole shoe ring and the outer circular surface of the shaft; the pole teeth provided on the outer circular surface of the shaft, so The pole teeth extend radially to the inner circular surfaces of the left pole shoe ring and the right pole shoe ring, leaving a gap therebetween, and the gap is filled with magnetic fluid for sealing. The permanent magnet is made of sintered NdFeB, and there are axially communicating through holes on it. When the diameter of th...
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The invention relates to a magnetic fluid seal with an axial through hole structure magnetic source, which comprises a shell, a left pole shoe ring, a right pole shoe ring and a permanent magnet ring. The invention solves the problems of data collection, positioning, communication, and difficult processing of permanent magnet rings in the ring magnets commonly used in magnetic liquid seals. In engineering, data monitoring devices, such as temperature sensors and speed sensors, can be placed at the through holes for data processing. collection; or process threads at the through hole to meet the fixing needs of the ring magnet, so that the magnetic liquid seal can solve the above-mentioned problems in engineering on the one hand, and on the other hand make the structure of the permanent magnet lighter and reduce the weight of the rotating shaft. load.
Description
technical field [0001] The invention belongs to the field of mechanical engineering sealing, in particular to a magnetic fluid sealing device with an axial through-hole structure magnetic source. Background technique [0002] Magnetic fluid seal is to use permanent magnets to generate magnetic field force in the sealing gap to firmly fix the magnetic fluid in the sealing gap to resist the pressure difference on both sides, so as to achieve the sealing effect. [0003] In some sealing occasions, in addition to the need to seal the sealed cabin and the external environment, there are also problems of adding magnetic liquid, data collection, positioning, and connection. Referring to the field of mechanical engineering, the first method that comes to mind is to process the connection on the permanent magnet. Through hole, but because the through hole structure on the permanent magnet will weaken the pressure resistance of the magnetic liquid sealing device to a certain extent, a...
Claims
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Login to View More IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 刘嘉伟李德才
Owner BEIJING JIAOTONG UNIV