Frequency is consistent with the rotational speed
Reason one, pressure pulse vibrates. A, inspection method, the conditions, characteristics: 1, send the pipe or pump body vibration frequency for zinc (Z as leaf number, N for speed) (large high-pressure pump for welding pump shell, the vibration); 2, the clearance between the impeller outer diameter and pump body's throat is small; 3, high-speed operation of the pump noise; , 4, with the blade of guide vane impeller blade number is equal to or both have a common factor (the latter to Z1N [Z1 number of blades of the impeller and guide blade leaf number of the least common multiple of] the frequency of the vibration); 5, multistage pump impeller blade and at all levels of the throat of the relative position, any level are equal. Part B, measures: 1, cut to the throat, leaving with the impeller diameter; 2, reinforced pipe or the pump body; 3, the short length of the inner diameter of the guide under plate.
Reason 2, rolling bearing rust damage etc. A, inspection method, the conditions, characteristics: 1, the pump frequency vibration of P * N (P for the rolling bearing of ball or roller number, N for speed). 2, rolling bearing rust; 3, high fever of bearing during operation; 4, the inside of the bearing lubricating oil or grease metamorphism; 5, in most cases, internal bearing abnormal sound. B, measures: 1, change the bearing; 2, replace lubricating oil or grease. 3, the use of water or the structure of the dust is not easy to invade. |