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Magnetic couplings are utilized in many applications inside pump, chemical, pharmaceutical, course of and security industries. เพรสเชอร์เกจน้ำ are typically used with the purpose of lowering put on, sealing of liquids from the setting, cleanliness needs or as a safety issue to brake over if torque suddenly rises.
The most common magnetic couplings are made with an outer and inside drive, each build up with Neodymium magnets to have the ability to get the best torque density as attainable. By optimizing the diameter, air hole, magnet dimension, variety of poles and choice of magnet grade, it is potential to design a magnetic coupling that suits any utility in the range from few millinewton meter as much as several hundred newton meters.
When solely optimizing for top torque, the designers typically are most likely to overlook considering the affect of temperature. If the designer refers again to the Curie point of the person magnets, he will declare that a Neodymium magnet would fulfill the necessities up to greater than 300°C. Concurrently, it may be very important embrace the temperature dependencies on the remanence, which is seen as a reversible loss – typically round zero,11% per degree Celsius the temperature rises.
Furthermore, a neodymium magnet is under pressure throughout operation of the magnetic coupling. This implies that irreversible demagnetization will happen long earlier than the Curie level has been reached, which typically limits using Neodymium-based magnetic coupling to temperatures below 150°C.
If higher temperatures are required, magnetic couplings manufactured from Samarium Cobalt magnets (SmCo) are typically used. SmCo isn’t as strong as Neodymium magnets however can work up to 350°C. Furthermore, the temperature coefficient of SmCo is just 0,04% per diploma Celsius which implies that it might be utilized in purposes where performance stability is needed over a larger temperature interval.
New generation In collaboration with Copenhagen Atomics, Alfa Laval, Aalborg CSP and the Technical University of Denmark a new generation of magnetic couplings has been developed by Sintex with support from the Danish Innovation Foundation.
เกจวัดแรงดันsumo of the project was to develop a magnetic coupling that would expand the working temperature space to reach temperatures of molten salts round 600°C. By exchanging the inside drive with a magnetic materials containing a higher Curie level and boosting the magnetic area of the outer drive with particular magnetic designs; it was potential to develop a magnetic coupling that started at a lower torque stage at room temperature, however solely had a minor reduction in torque stage as a function of temperature. This resulted in superior efficiency above 160°C, no matter if the benchmark was against a Neodymium- or Samarium Cobalt-based system. This could be seen in Figure 1, the place it is proven that the torque degree of the High Hot drives has been examined up to 590°C on the internal drive and nonetheless performed with an almost linear discount in torque.
The graph also reveals that the temperature coefficient of the High Hot coupling is even lower than for the SmCo-system, which opens a lower temperature market the place efficiency stability is necessary over a bigger temperature interval.
Conclusion At Sintex, the R&D division remains to be growing on the technology, but they need to be challenged on torque level at either different temperature, dimensions of the magnetic coupling or new applications that have not beforehand been potential with standard magnetic couplings, to find a way to harvest the full potential of the High Hot technology.
The High Hot coupling isn’t seen as a standardized shelf product, however as a substitute as custom-built by which is optimized for particular functions. Therefore, further improvement will be made in shut collaboration with new companions.
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