Magnetic liquid mechanical seal
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A magnetic fluid mechanical seal utilizes the magnetic energy in permanent magnets to create a non-uniform magnetic field with varying strengths in the gap between the rotating shaft and the toothed edges of the pole shoes. This magnetic field draws the magnetic fluid tightly together, forming a magnetic fluid \"O\"-ring that seals off the gap and thus achieves the purpose of sealing. https://attach01.hcbbs.com/forum/201903/13/111619hxzgt4z95hy59444.png Its features include: zero leakage, the ability to adjust the composition of the sealing fluid to suit various hazardous media, no wear and tear, maintenance-free operation, and no need for auxiliary systems. Currently, some applications exist for low-speed operating conditions (linear velocity ≤ 15 m/s), and high-speed operating conditions have also been developed; due to their different structures, laboratory tests are being conducted. In reciprocating compressors, the existing displacer chamber can be utilized to achieve complete sealing with zero leakage. Apart from special operating conditions with high leakage requirements and high medium corrosivity, will this new technology also become popular in normal operating conditions? After all, no maintenance is required in the later stages.
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What a coincidence – Yantai Wolm Vacuum Technology Co., Ltd. happened to be passing by
What a coincidence; it turns out to be Mr. Lin’s place
This is a technology developed by a professor from Tsinghua University. There’s another company that claims to offer ordinary mechanical seals with zero leakage; it’s based in Nanjing, and the technology seems to be developed by a professor from Zhejiang University. These seals use axial sealing, with the sealing material being modified PTFE. It is said that their price is lower than that of products from Dandong and Japanese manufacturers, but their application range is limited – they are mainly suitable for low-speed applications, where the linear velocity is less than 5 M/S