china slurry pump slip phenomenon and the reasons for Analysis of Magnetic

china slurry pump slip phenomenon and the reasons for Analysis of Magnetic

      china slurry pump is also known by the magnetic centrifugal pumps, magnetic drive , motor driven pump consists of three departments . Working principle is the magnet n (n is even ) are arranged according to the laws in the magnetic actuator assembly , the outer magnetic rotor , the magnet sector coupled with each other to form a complete magnetic systems. When the inner and outer magnetic poles in different relative , that is, the displacement angle Φ between two poles = 0 ° , the magnetic energy minimum magnetic system ; When rolling to the same magnetic poles relative displacement angle between two poles that Φ = 2π / n , the maximum magnetic energy magnetic system . After removing the external force , because the magnetic poles repel each system , the magnet will be restored to the magnetic force of the magnetic energy of the lowest state of the magnet in motion so driven magnetic rotor. Can penetrate the air gap magnetic and non-magnetic material , the inner magnetic rotor and the driven wheel is connected for synchronous rotation , to achieve non-contact power transmission, and thus solve the pump leakage.
      ( 1 ) sliding magnetic phenomena
      When the china slurry pump thrown overload during operation or when stuck rotor magnetic actuator driving and driven parts will automatically slip , this time driven synchronous operation with the active component parts not cause demagnetization . Its features are:
      ① pump outlet pressure drops.
      ② pump motor current drops .
      ③ magnetic actuator even at rapid temperature rise.
      Long-term operation under the permanent magnet on the magnetic actuator in the active role of the alternating magnetic field of the rotor , the eddy loss, magnetic loss , resulting in a temperature rise of the permanent magnet , the magnetic force magnetic actuator failure , but also on the pump bearings damage .
      ( 2 ) causes the magnetic china slurry pump slip there
      ① original use of the tube with a pump , the pump outlet line to DN100. After replacing the pump requires an export pipeline to DN65. However, because of the larger construction difficulty , still using the original DN100 pipeline. When rigged pumps, difficult to control the pump outlet valve opening degree , likely to cause the pump overloaded , resulting in sliding magnetic .
      ② Because the density of the liquefied gas as the temperature , large pressure changes when using a china slurry pumping gas, changing conditions of the pump is large, the possibility of an increase in pump capacity arising from erosion angry magnetic slide .
      ③ manipulate staff responsibility is not in place , the process of china slurry pump operation can not grasp the level of the tank , the pump for taking the time to produce a magnetic slip .
      ④ design magnetic moment is too small .
      ⑤ no time set for the magnetic coupling china slurry pump clean , magnetic attachments more sets , so that the magnetic decline , causing slippery magnetic thrown during operation .