Magnetic pump usage knowledge: Because the cooling and lubrication of the bearings depend on the transported medium, it is absolutely prohibited to run without load, and at the same time, avoid running without load caused by restarting after a power outage during work.
2. If the conveyed medium contains solid particles, a filter should be added to the pump inlet. If it contains ferromagnetic particles, a magnetic filter should be added.
When the third pump is in use, the ambient temperature should be less than ℃, and the temperature rise of the motor should not exceed ℃.
4. The transported medium and its temperature should be within the allowable range of the pump material. See the attached table for details. The operating temperature of the project is ℃, the operating temperature of the metal pump is ℃, and the suction pressure is not greater than the maximum working pressure, the density is not greater than /, and the viscosity is not greater than /, and does not contain hard particles and fibers.
5. The conveying liquid is a medium that is prone to precipitation and crystallization. It should be cleaned in time after use and the accumulated liquid in the pump should be drained.
After six hours of normal operation of the magnetic pump, the wear of the bearings and end moving rings should be disassembled and the wearing parts that should not be reused should be replaced.
What is a magnetic drive pump?
The abbreviation of magnetic coupling transmission pump was first successfully developed by a British company in 2000. A few years later, West Germany also developed successfully. The first two companies to use magnetic drive pumps were Imperial Chemical Industries of the United Kingdom and Bayer Chemical Company of Germany. The original purpose of developing magnetic drive pumps was to protect the safety and health of personnel engaged in chemical, nuclear power, national defense and other industrial sites. After the mid-2000s, the technical level of magnetic drive pumps has been greatly improved due to the development of new generation permanent magnets and silicon carbide bearing technologies such as rare earth cobalt and the most powerful neodymium iron boron. According to foreign samples and literature, the flow rate/lift of the magnetic drive pump can now reach the medium temperature range of ℃ ~ ℃ viscosity limit ~ the content of abrasive solid particles in the medium can reach up to 100% by weight. After taking special measures, the pump It can transport slurry containing insoluble solid matter, and the diameter of the solid matter can reach up to the system pressure. The magnetic drive pump is also suitable for high vacuum conditions where mechanical seals are difficult to handle. These technological breakthroughs and other improvements have resulted in astonishing improvements in the reliability and economy of magnetic drive pumps. A survey of the availability and ease of repair of magnetic drive pumps and mechanical seal pumps shows that the damage and failure rates of sealed pumps are significantly higher than those of magnetic drive pumps. For example, the average life of a mechanical seal on a thermal fluid pump at ℃ is a month, while a magnetic drive pump can run for many years, and the only maintenance required is normal lubrication of the external bearings of the pump and motor. The extensive experience gained in the chemical industry has led to the conclusion that magnetic drive pumps have developed into the most economical solution in many process installations. Therefore, the increase in the use of magnetic drive pumps is not only a reliable environmental factor, but also an economic factor that greatly reduces operating and maintenance costs. Its application scope has expanded from transporting hazardous liquids and precious liquids to general pump applications that require long life and low maintenance. For example, magnetic drive pumps are used on ocean-going ships to transport cold water for air conditioning systems due to high maintenance costs. The use of magnetic drive pumps has grown dramatically in the last decade and has become a common fixture in a variety of applications. Magnetic drive pumps can now cover all applications of sealless pumps.
The magnetic drive pump utilizes the characteristics of magnets that can attract ferromagnetic substances and the magnetic interaction between magnets or magnetic fields. Non-ferromagnetic substances do not affect or rarely affect the magnitude of the magnetic force, so they can pass through non-magnetic materials without contact. The conductor isolation sleeve performs power transmission, and this transmission device is called a magnetic coupling. The motor is connected to the outer magnet through a coupling, and the impeller is connected to the inner magnet. There is a fully sealed isolation sleeve between the outer magnet and the inner magnet, which completely separates the inner and outer magnets so that the inner magnet is in the medium. The rotating shaft of the motor directly drives the impeller to rotate synchronously through the attraction of the magnetic poles between the magnets. Its main advantage is that the transmission shaft does not need to penetrate the pump casing, but uses the magnetic field to transmit torque through the air gap and the thin-walled isolation sleeve to drive the inner rotor, thus fundamentally eliminating the leakage channel of the shaft seal and achieving completely sealed transmission. There is an overload protection function during power operation. Except for the high requirements on magnetic materials and magnetic circuit design, the technical requirements for the rest of the magnetic drive pump are not high, and the maintenance and repair workload of the magnetic drive pump is small. Its main disadvantage is that its efficiency is lower than that of ordinary centrifugal pumps. It has higher material and manufacturing requirements for the isolation sleeve to prevent single-sided leakage. Due to the limitations of materials and magnetic transmission, magnetic drive pumps are generally only used to transport media below ℃ in China. The wear resistance of the isolation sleeve material is generally poor, so the magnetic drive pump is generally used to transport media that does not contain solid particles. The coupling alignment requirements are high. Improper alignment will cause damage to the bearing at the inlet and prevent single-sided leakage. Wear of the isolation sleeve.
Japan PANWORLD Expo magnetic pump 200ps-f