进口不锈钢磁力泵是由磁力泵由泵、磁力传动器、电动机三部分组成。关键部件磁力传动器由外磁转子、内磁转子及不导磁的隔离套组成。 当电动机带动外磁转子旋转时，磁场能穿透空气隙和非磁性物质，带动与叶轮相连的内磁转子作同步旋转，实现动力的无接触传递，将动密封转化为静密封。由于泵轴、内磁转子被泵体、隔离套完全封闭，从而 解决了“跑、冒、滴、漏”问题，消除了炼油化工行业易燃、易爆、有毒、有害介质通过泵密封泄漏的安全隐患，有力地保证了职工的身心健康和安全生产。
在采用金属隔离套时，隔离套处于一个正弦交变的磁场中，在垂直于磁力线方向的截面上感应出涡电流并转化成热量。涡流的表达式为：其中Pe－涡流；K—常数；n—泵的额定转速；T－磁传动力矩；F－隔套内的压力；D－隔套内径； 一材料的电阻率； —材料的抗拉强度。当泵设计好后，n、T是工况给定的，要降低涡流只能从F、D等方面考虑。选用高电阻率、高强度的非金属材料制作隔离套，在降低涡流方面效果十分明显。
Germany Kaysen imported stainless steel magnetic pump overview
The stainless steel magnetic pump is composed of a magnetic pump consisting of a pump, a magnetic actuator and a motor. The key component magnetic actuator consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and the non-magnetic material, and the inner magnetic rotor connected with the impeller rotates synchronously to realize the non-contact transmission of the power, and the dynamic seal is converted into a static seal. Since the pump shaft and the inner magnetic rotor are completely closed by the pump body and the isolation sleeve, the problem of “running, escaping, dripping and leaking” is completely solved, and the flammable, explosive, toxic and harmful medium of the refining and chemical industry is eliminated from the pump seal leakage. The safety hazard has effectively guaranteed the physical and mental health and safe production of employees.
The n pairs of magnets (n is an even number) are regularly arranged and assembled on the inner and outer magnetic rotors of the magnetic actuator, so that the magnet portions form a complete coupled magnetic system. When the inner and outer magnetic poles are in opposite poles, that is, the displacement angle Φ=0 between the two magnetic poles, the magnetic energy of the magnetic system is the lowest; when the magnetic pole rotates to the same pole, the displacement angle between the two magnetic poles is Φ=2π. /n, at this time the magnetic energy of the magnetic system is the largest. After the external force is removed, the magnetic force will return the magnet to the state with the lowest magnetic energy because the magnetic poles of the magnetic system repel each other. The magnet then moves to drive the magnetic rotor to rotate.
The permanent magnet made of rare earth permanent magnet material has a wide operating temperature range (-45-400 ° C), high coercive force, good anisotropy in the direction of the magnetic field, and no demagnetization when the same pole phase is close. It is a good source of magnetic field.
When a metal isolating sleeve is used, the spacer is in a sinusoidal alternating magnetic field, and an eddy current is induced and converted into heat in a section perpendicular to the direction of the magnetic line. The expression of the eddy current is: where Pe- eddy current; K-constant; n - rated speed of the pump; T-magnetic drive torque; pressure in the F-sleeve; D- spacer inner diameter; resistivity of a material; Tensile strength. When the pump is designed, n and T are given by the working conditions. To reduce the eddy current, only F, D and so on can be considered. The use of high-resistivity, high-strength non-metallic materials to make the isolation sleeve, the effect is very obvious in reducing the eddy current.
Cooling lubricant flow
When the pump is running, a small amount of liquid must be used to flush and cool the annulus region between the inner magnetic rotor and the spacer sleeve and the friction pair of the sliding bearing. The flow rate of the coolant is usually 2% to 3% of the pump design flow rate, and the annulus region between the inner magnetic rotor and the isolation sleeve generates high heat due to the eddy current. When the cooling lubricating fluid is not enough or the flushing hole is not smooth or blocked, the medium temperature is higher than the working temperature of the permanent magnet, so that the inner magnetic rotor gradually loses magnetism and the magnetic actuator fails. When the medium is water or water-based liquid, the temperature rise of the annulus region can be maintained at 3-5 ° C; when the medium is hydrocarbon or oil, the temperature rise of the annulus region can be maintained at 5-8 ° C.
The material of the magnetic pump sliding bearing is impregnated graphite, filled with polytetrafluoroethylene, engineering ceramics, and the like. Because engineering ceramics have good heat resistance, corrosion resistance and friction resistance, the sliding bearings of magnetic pumps are mostly made of engineering ceramics. Since the engineering ceramics are very brittle and the expansion coefficient is small, the bearing clearance must not be too small to avoid the occurrence of a shaft hazard.
Since the sliding bearing of the magnetic pump is lubricated by the medium to be conveyed, the bearing should be made of different materials according to different media and working conditions.
The Kaysen Pumps GmbH in Schw?bischGmünd, Germany, is one of the world's leading manufacturers of fluid centrifugal pumps and diaphragm pumps. For more than 60 years, Kaisen has achieved the highest standards of reliability and quality of "Made in Germany". With our comprehensive product portfolio, we support customers around the world to successfully grasp the harsh pumping tasks of water supply, mining, industry, chemical, paper, electricity, food, pharmaceutical, sewage and marine industries. As a leading provider of innovative technology in these areas, we are the perfect partner for liquids to be safe, efficient and economical to transport. ,
Germany Kaysen always adhere to the "quality, stresses credibility" for the purpose. Products are selling all over the country, and has gradually developed overseas markets. The company has repeatedly been rated as "the contract with the letter" business, won the trust of users and extensive praise.