Magnetic liquid sealing device
A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of increasing the difficulty of installing magnetic liquid sealing devices, poor pressure resistance, etc.
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Embodiment 1
[0041] Such as figure 1 As shown, the magnetic liquid sealing device 100 includes two pole pieces 130: a first pole piece 132 and a second pole piece 133, and also includes a permanent magnet 140 and a magnetically permeable sleeve 150, the permanent magnet 140 and the magnetically permeable sleeve 150 are on the shaft 120 is axially located between the first pole piece 132 and the second pole piece 133 .
[0042] The permanent magnet 140 has an opposite first end (left end) and a second end (right end) in the axial direction of the rotating shaft 120, the first end of the permanent magnet 140 is adjacent to the first pole piece 132 compared to the second end of the permanent magnet 140, And there is a space between the first end of the permanent magnet 140 and the first pole piece 132 , and there is a space between the second end of the permanent magnet 140 and the second pole piece 133 . That is to say, the first end of the permanent magnet 140 is opposite to the first pole...
Embodiment 2
[0062] The structure of the magnetic liquid sealing device 100 in this embodiment is as follows image 3 As shown, the difference from the first embodiment is that the outer peripheral surface of the permanent magnet 140 in this embodiment is formed with a second pole tooth 171, and the tooth top surface of the second pole tooth 171 is connected to the inner peripheral surface of the magnetic sleeve 150. There is a gap between them, and the second magnetic liquid 1711 is located in the gap. The second magnetic liquid 1711 is in contact with each of the inner peripheral surface of the magnetic sleeve 150 and the top surface of the second pole tooth 171 .
[0063] Optionally, the size of the gap between the top surface of the second pole tooth 171 and the inner peripheral surface of the magnetic sleeve 150 is between 0.1mm-0.3mm.
[0064] The magnetic liquid sealing device 100 in this embodiment has a more excellent sealing effect without increasing the dimension of the magneti...
Embodiment 3
[0066] The structure of the magnetic liquid sealing device 100 in this embodiment is as follows Figure 4 As shown, the structure of the magnetic liquid sealing device 100 in this embodiment is similar to the first embodiment, the difference is: the outer peripheral surface of the permanent magnet 140 and the magnetic sleeve 150 are opposite to the permanent magnet 140 in the radial direction of the rotating shaft 120 Each part of the inner peripheral surface is formed with a second pole tooth 171, and the second pole tooth 171 on the permanent magnet 140 and the second pole tooth 171 of the magnetic sleeve 150 are opposite to each other in the radial direction of the rotating shaft 120. There is a gap in which the second magnetic liquid 1711 is located. The second pole teeth 171 on the permanent magnet 140 and the second pole teeth 171 of the magnetically permeable sleeve 150 are opposite to each other in the radial direction of the rotating shaft 120. The number of the seco...
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