Fluorine plastic magnetic pump is a major breakthrough in the development of the pump industry in recent years, it is a wide range of applications, and its main components of the material Magnetic pump magnet, isolating sleeve and sliding bearings are magnetic pump The main components of its choice of material properties of the pump price, structure, reliability, efficiency and life have a greater impact. Let's take a look at the structure of fluorine plastic magnetic pump. Fluorine plastic magnetic pump structure (1), the outer magnet material ①Ferrite low prices, the use of temperature is less than 85 ℃, low magnetic energy product (10-30kJ / m3), the magnetic loss of large loss, when the rotor part of the pump Slippage occurs, overload or stalling, demagnetization can occur. Ferrite Magnetic materials are early magnetically driven pump magnet materials. At present, foreign countries have seldom adopted. ② rare earth cobalt rare earth cobalt is a relatively new type of permanent magnet. Varieties are: SmCo, Alnico, praseodymium cobalt, mixed rare earth cobalt and dilute cobalt copper. Its magnetic drive efficiency and high energy product (energy product 80 ~ 240kJ / m3), and has a strong anti-demagnetization capability, the coercive force HCT of 360 ~ 1200kA / m. SmCo couplings require only 6% of the mass of the ferrite coupling. Can deliver considerable torque, its use temperature up to 300 ℃. ⑧ neodymium iron boron neodymium iron boron is a rare earth permanent magnet, l983 by the newly released domestic price of goods. NdFeB is the third generation of new magnetic materials, with the basic properties of samarium cobalt, but the magnetic energy product is higher than samarium cobalt, the disadvantage is the use of temperature is only 120 ℃, and the magnetic stability is relatively poor. Rare earth cobalt (such as samarium cobalt) and NdFeB rare earth permanent magnets are very suitable for the production of magnetic steel pump. The disadvantage is brittle brittle, and the price is much higher than the ferrite. (2) Sliding bearing materials ①Silicon Carbide Ceramic SiC is an excellent sliding bearing material with high load carrying capacity and excellent resistance to erosion, chemical attack, abrasion and good heat resistance. Temperature up to 500 ℃ or more, the disadvantage is the price is more expensive, and can not afford a short dry operation. Graphite graphite is also an ideal sliding bearing material, and has good self-lubricating properties, can withstand short dry operation, the use of temperature up to 450 ℃, but can not be prone to electrolytic destruction of the medium used. ⑧ Filled PTFE Filled with carbon, Glass Fiber and other made of sliding bearings, the use of temperature ≤ 120 ℃, excellent corrosion resistance. (3) Isolation Sleeve ①The metal isolating sleeve has eddy current loss in the metal isolating sleeve. To reduce the eddy current loss and improve the transmission efficiency, high-resistance metal materials such as Hastelloy C, titanium and their alloys should be used. Eddy current losses generally account for 15% -25% of the total drive efficiency. ② non-metallic isolation sleeve non-metallic isolation sleeve no eddy current losses, it can be a corresponding increase in magnetic coupling transmission efficiency. Non-metallic isolation sets of plastic and ceramic two. Plastic temperature is generally low (such as PVDF isolation sleeve temperature limit of l20 ℃, polypropylene temperature limit increased to 100 ℃), while the high temperature ceramic. Therefore, in order to eliminate the eddy current loss, under normal circumstances mostly non-metallic isolation sleeve (mainly plastic). When the pressure, temperature exceeds the limit of use of non-metallic isolation sleeve, metal isolation sleeve can be used. Further reading: industry leaders IFAT China Guangzhou Exhibition building water pump manufacturers ranking article belongs to Internet industry (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: gogoing (QQ / WeChat:) Starting: http://beng.liuti.cn/ (Service Hotline:)
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