Irregular type vibration
Reason one, part flow operation caused by vibration. A, check method, the conditions, characteristics: 1, the determination of the pressure of the suction side and discharge side, and then calculated according to the measured pressure value operation flow, if below the prescribed flow halfway through, will produce considerable vibration. This kind of phenomenon occurs mostly in the large high speed pump. 2, if less than half the prescribed flow double suction pump running, the reciprocating movement of the shaft to produce intense, the consequence of shafting and the amplitude of the increase. B: 1, change to increase pump discharge device; 2, check out the side of the valve is fully open; Part 3, set the bypass device, discharge water yield to return to the suction pipe or suction slots.
Reason two, cavitation caused by vibration. A, inspection method, the conditions, characteristics: 1, the determination of the pressure of the suction side and discharge side, and then calculated according to the measured pressure value operation flow, analysis of whether to produce cavitation; 2, to check whether there is unusually high vacuum of suction side; 3, in general, a lot of noise, when the suction side pressure below atmospheric pressure, a small amount of air inhaled noise decrease; 4, when close the discharge valve, sharply reduced noise, amplitude is reduced, the discharge gauge pointer swing sharply. B: 1, close the discharge valve; 2, improve the suction tank water level; 3, bold suction pipe (at the inlet line longer).
Reason Three , the vibration of the discharge side of the valve. A, check method, the conditions, characteristics: 1, check whether the discharge side of the valve is fully open (valve under the valve ajar, produce vibration and through the pipeline to pump); 2, the discharge side of the valve fully open, vibration reduction; 3, the discharge valve, such as supporting feet, check whether are in good state of installation. B: 1, to the valve are in a state of half open, with concrete to hold the valve, the valve vibration is not passed to the water pump; 2, to the large diameter valves, pay attention to choose not to produce vibration valve structure.
Reason Four, the inside of the pump rotating components and rotational part of contact or sliding part damage. A, inspection method, the conditions, characteristics: 1, the ammeter pointer swing; More than 2, accompanied by metal sound; 3, usually bearing heating; 4, high temperature liquid pump, at startup are prone to the phenomenon.
Reason five, too tightly on the stuffing box, vibration is produced. A, check method, the conditions, characteristics: 1, develops in small pump; 2, packing heat. B: relax packing, tighten the bolt. |