Shandong Hanqi Industrial Co.,Ltd.
Shandong Hanqi Industrial Co.,Ltd.

In the field of fan bearing vibration, the vibration of rotor mass unbalance accounts for the majority

       The main reasons for rotor mass imbalance are as follows:

Impeller wear (mainly blade) is not uniform or corrosion;

Uneven ash accumulation or attachment (e.g. rust) on blade surface;

Wing hollow blade or other parts of the cavity adhesive ash;

Local high temperature makes the shaft bend;

Impeller is not balanced after maintenance;

Impeller strength is insufficient to cause impeller cracking or local deformation;

Parts on the impeller are loose or connectors are not fastened.

Characteristics of vibration caused by rotor imbalance:

The vibration value is in the horizontal direction. Large, but the axial is small, and the bearing seat bearing vibration is greater than the thrust bearing;

Amplitude increases with revolution.

Vibration frequency is equal to speed frequency;

Vibration stability is good, not sensitive to load changes;

The measured phase Angle is unstable and the vibration frequency is 30% ~ 50% working speed when the hollow blade is displaced due to the gray inside or some parts are not welded firmly.

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    Name: Ivan

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    Add: Zhoulong Rd, Nanjiao Town, Zhoucun District, Zibo City, Shandong Province of China