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Measures and ways to improve operational reliability of magnetic pumps for sea-chen ladder
I. Introduction My company's new product 40,000 tons / year methane chloride new device has been officially opened. In the selection of project equipment, we have extensive research, adhere to the concept of innovation, according to the production process and the characteristics of the material delivery medium, the selection of 27 sets of new Mihai gram magnetic pump. Sea Mi ladder magnetic pump is from Dalian Sea Mi Le sealed Pump Co., Ltd. production. The pump design advanced, no shaft seal, as a leak-free, maintenance-free, reliable centrifugal pump operation, with safety, efficiency, energy saving features. For transporting corrosive, toxic, flammable, explosive, expensive or easy to vaporize liquids. In addition, the sea-Mile ladder magnetic pump is also suitable for transporting high-temperature, low-temperature fluids and liquids under vacuum. Due to its completely leak-free advantages, it has successfully solved the problems of running, running, dripping and leaking in fluid transportation. It has become an irreplaceable product in environmental engineering and is widely used in petroleum, chemical, refrigeration, air-conditioning, aerospace, etc. In the field. Compared with the traditional seal pump, sea Mirage gram magnetic pump with a maintenance workload is small, without external lubrication, no leakage, vibration, noise and other advantages. However, due to its own characteristics in many ways it is different from the traditional centrifugal pump, so in the process, installation, operation and so take some measures and ways to ensure its reliable and smooth operation. Second, the characteristics of magnetic Mihai magnetic pump 1. Structure: Sea-Mile ladder magnetic pump is axial suction, radial discharge of horizontal completely leak-free centrifugal pump, the shaft through the magnetic coupling drive, no rotary shaft seal device, sea Mirage gram magnetic pump to achieve "zero leakage ". 2. Bearings: Sea-Mile ladder magnetic drive shaft through the rolling bearing bearings, rolling bearings lubricated by its own grease; pump shaft through the hydraulic sliding bearings. 3. Magnetic coupling: Sea Mirage Keke magnetic pump magnetic block is a high-quality rare earth permanent magnet materials, the maximum irreversible temperature up to 350-400 ℃, fully guarantee the magnetic coupling with reliable performance. Normal work, the magnetic coupling and three-phase asynchronous motor synchronous operation, stable performance. And permanent magnets are highly stable and prevent the adverse effects of assembling and disassembling the rotor or operating the pump at maximum torque. 4. Lubrication of sliding bearings and cooling of magnetic couplings: The medium delivered by the pump is lubricated and cooled without the need for external lubrication and cooling water systems. 5. Axial force balance: At work, the axial force of the magnetic MiTAC magnetic pump is automatically balanced by the hydraulic force to drive the disk to withstand instantaneous axial thrust when starting and stopping. Third, sea-Mi ladder magnetic pump common fault problem analysis 1. Pump operating conditions caused by fluctuations in a large problem: Sea Mirage magnetic pump axial force is automatically balanced by hydraulic equilibrium. In the actual operation, if the operating parameters (inlet pressure, outlet pressure) fluctuations, it is easy to damage the magnetic Mihai Gravity magnetic pump balance, so that the bearing to bear the large radial and axial load bearing damage caused. 2. Pump cavitation caused by the problem: Pump cavitation causes mainly pump inlet tube resistance, medium more gas, filling pump is not sufficient, the pump inlet can not enough and other reasons. Cavitation is the most damaging to the pump. In case of cavitation, the pump vibrates violently and the hydraulic balance will be severely damaged, which will damage the pump bearing, rotor or impeller. This is a common cause of Malcolm magnetic pump failure. 3. No medium or medium flow rate is small: dry friction bearings, burning bearings. Sea-Mile ladder magnetic pump is provided by the transmission medium to the lubrication and cooling of the plain bearings, without opening the inlet valve or the outlet valve, the sliding bearings due to non-transmission medium lubrication and cooling damage. 4. Isolation sleeve damage: Sea-Mile ladder magnetic pump magnetic coupling is transported by the pump medium cooling, if the medium with hard particles, it is easy to cause the isolation sleeve scratched or scratched, and sometimes improper maintenance methods may also be Caused by the isolation sleeve damage.