What are the reasons for acid and alkali resistant magnetic pumps to have abnormal noise?

　　Acid and alkali magnetic pump rattling and vibration, mainly caused by the pump pumping vacuum, pump capacity is too large, pump cavitation, for any vibration of the rotating equipment is too large, in the absence of high temperature resistant magnetic pump is damaged before, it should immediately stop its work.

　　Acid and alkali magnetic pump has the reason of abnormal noise

　　1. Pump pumping

　　Acid and alkali magnetic pump vibration sound is due to pumping, which indicates that the pumping pressure is not enough to prevent the vaporization of the liquid in the magnetic pump, bubble deformation caused by broken vibration, if the pumping continues, the pump shaft seal, shaft tile and impeller are subject to damage.

　　The ideal way to stop the pump pumping is to throttle the pump outlet to reduce the flow rate, and then improve the pump pumping tank level, and then directly stop the pump, the better way is to pump the liquid with the pumping tank for the padlock.

　　2. Pump cavitation

　　Cavitation occurs when the noise and vibration, impeller localized by the repeated action of the huge impact force, material surface fatigue from pitting to form a serious honeycomb cavity, so that the impeller damage.

　　In addition, when the cavitation is serious, it will produce a large number of bubbles, occupying part of the liquid flow path, resulting in a significant decline in the flow pressure head and efficiency of the high temperature magnetic pump, therefore, in order to enable the pump to operate normally, the impeller inlet at the low pressure must be maintained above a certain critical value, and the low pressure should be greater than the delivery temperature of the liquid under the saturated vapor pressure in the actual operation of the occurrence of cavitation, it must be immediately after the chemical pump exhaust, in order to discharge pumps In actual operation, after the occurrence of cavitation, the chemical pump must be exhausted immediately to discharge the gas inside the pump.

　　3. Magnetic pump capacity is too large

　　Large-capacity high-temperature magnetic pump in the case of reducing the capacity, the operation process will often emit low and raspy sound, which is mainly due to the internal circulation inside the impeller caused by a long time so that the impeller will be partially damaged, the appropriate method is to increase the outlet flow.

　　4, motor reversal (new machine)

　　The first time installed, because the motor wiring and power wiring, it is not easy to distinguish between the wiring position, so it will lead to wiring errors, resulting in motor reversal.

　　Check method: after the installation of the magnetic pump, the instantaneous start, and open the switch, immediately closed, through the motor back cover to observe the fan steering, clockwise rotation indicates that the wiring is correct, counterclockwise rotation indicates that the wiring is wrong.

　　Solution: use a screwdriver to open the motor junction box, adjust the wiring direction.

　　5, bottom valve clogging

　　Pump in the process of operation, the import has a certain suction, may inhale large solids, resulting in insufficient water intake, impeller rotation will cause gas-liquid mixing sound, noise sound.

　　Inspection method: check whether the inlet pipe is blocked with liquid.

　　Solution: clear the inlet foreign matter, see if the noise is clear.

　　6、Inlet pipe leakage

　　Inlet pipe leakage will lead to air intake in the pump body, accompanied by liquid leakage phenomenon, resulting in insufficient water intake in the pump, the impeller rotation will cause gas-liquid mixing sound, noise sound.

　　Checking method: check whether there is any liquid leakage in the inlet pipe.

　　Solution: a, flange screws loose; b, imported by Ren, ball valve is not tightened; c, the import pipeline is not installed, pvc glue less playing, pp is not fused well; d, imported pipeline cracking

　　7、Impeller inhalation of foreign objects

　　The inlet is not equipped with a screen, easy to inhale solids, due to the narrow internal structure of the pump body, therefore, the inhalation of foreign objects, it is easy to cause the impeller stuck, or running eccentric, resulting in friction between the impeller and the inner wall of the pump, the formation of the noise, generally such a in the noise is more dull.

　　Check method: after stopping the machine, open the front cover of the magnetic pump to see if the impeller is stuck with foreign objects.

　　Solution: clean up the debris in the pump, check whether the pump impeller is seriously worn, rupture and other phenomena. If necessary, you can replace the impeller.

　　8, bearing noise

　　The bearing inside the motor is damaged due to lack of oil or long time working at high temperature, which causes sharp and ear-splitting noise.

　　Inspection method: As the magnetic pump is generally non-metallic material, the harsh sound is basically metal friction, so you can judge where the problem occurs according to the noise.

　　Solution: metal ear-piercing sound - replacement of bearings.

　　9, fan blade and fan blade cover friction

　　Due to collision caused by motor shroud depression, shroud and fan with friction caused.

　　Inspection method: Observe the shroud has no depression.

　　Solution: Make correction or replace the fan blade cover.