Any mechanical equipment in the use of the process of operation specification or not, daily maintenance management and other aspects will affect its service life, multistage centrifugal pump as a high-pressure pump, naturally is no exception, that want to extend the service life of multi-stage centrifugal pump need to do what? In this paper, the multistage centrifugal pump manufacturer Changsha Zoomlian Pump industry summarized the following methods, according to these methods to use, can effectively extend the service life of the multistage centrifugal pump.
1, preparation before starting: before starting the pump, the pump should be comprehensively inspected, especially after the newly installed or overhauled pump. The inspection contents include the flexibility of the unit rotor, the state of the bearing oil, the opening and closing of the gate valve on the outlet pipe, whether the connection bolts of the motor and the pump are loose, whether there is debris at the water inlet, whether the steering of the motor and the pump is consistent, and whether the control system is normal.
2, Water diversion and start-up: Water must be diverted before the centrifugal pump starts. Small pumps usually use the method of filling water to exhaust, while large and medium-sized pumps may use the method of water ring vacuum pump to pump air and water. When starting, the brake should be closed and started, and pay attention to the reading of the pressure gauge and the vacuum meter to ensure that the pump is normally pressurized.
3, operation management: During operation, pay attention to whether the sound and vibration of the pump are normal, whether the bearing temperature and oil amount are appropriate, the dripping of the packing box, whether the coupling and bolts are offset or loose, and the change of the instrument pointer.
4, parking operation: before parking should first close the vacuum gauge and pressure gauge valve, and then slowly close the pressure pipe gate valve, the implementation of closed parking. After stopping, the pump and motor surface should be cleaned, and the water in the pump housing should be drained to prevent freezing and cracking when not used for a long time or in winter.
5, maintenance: regular maintenance work, including checking and replacing lubricating oil, checking the sealing performance of the pump, cleaning the pump interior and checking the mechanical parts of the pump.
6, choose the right pump: choose the right pump according to the characteristics of the liquid transported, and check the required performance, analyze the suction and discharge conditions.
7, Installation precautions: When installing flexible expansion pipe fittings on the pump's spit pressure pipe, ensure that both ends of the flange are fixed to avoid affecting the normal operation of the pump due to pipeline stress. Water ring vacuum pump is used to pump air and water. When starting, the brake should be closed and started, and pay attention to the reading of the pressure gauge and the vacuum meter to ensure that the pump is normally pressurized.