Analysis And Research On High Temperature Failure Of Magnetic Driven Centrifugal Pump Application

For magnetic torque technology of permanent magnet, a shroud between the inner magnetic ring and the outer of Magnetic driven centrifugal pump not connecting each other, completely avoids leaking from magnetic pumps, which instead of the mechanical seal pumps, are widely used in petroleum, chemical, pharmaceutical and other industries to meet danger operation, corrosive fluid, solve the leakage and pollution problem and achieve the environmental protection requirements. As China has strongly advocated for energy saving devices, magnetic pump has broad prospects for development in the field of industrialization.In high temperature conditions, magnetic pumps prone to demagnetization and cavitation failure, which are occurring currently in the high temperature application devices. That greatly restricts the development of magnetic pumps. In this paper, by analyzing these types of high temperature failures and combining the practical application of the process system with product design, we can get the reasons of the temperature rise too high. The magnetic coupling is the key part of the magnetic pump, and it is also susceptible to the high temperature failure. Therefore, in this paper, Author mainly analyzes the relationship of the internal energy loss and the temperature rise of the cooling circulation, the calculation of energy of the eddy current loss and friction loss of internal magnetic rotor, minimum return flow of cooling circulation and solution of temperature rise.Simulating the design results by computer fluid software, analyzing the flow velocity, temperature and pressure of the cooling circulation, the result shows that the computer simulation is consistent with the design, which proves the method.Some methods for the reliable operation of the magnetic centrifugal pump in the high temperature application field in the industry are found for reference, which can reduce the occurrence of failures due to high temperature and the cost of equipment operation and the economic loss caused by the failure of the equipment and the output of the machine.