What are the reasons for abnormal vibration values in the NGW42-100 planetary gear reducer base

The core causes of abnormal vibration values in the NGW42-100 planetary gear reducer base are force imbalance, component failure, or installation/working condition deviation, which can be divided into four categories covering the entire process from assembly to operation.
1. Installation and assembly issues

The uneven installation surface of the machine base, loose or unevenly fastened foundation bolts, result in unbalanced force on the machine base and vibration during operation.

Excessive coaxiality deviation (over 0.02mm) of the input/output shaft, or installation deviation of the coupling, can cause additional radial force and vibration of the motor seat.

The mating surfaces between the machine base and the end cover, bearing seat, etc. are not tightly fitted, resulting in gaps and generating impact vibrations during operation.

2. Defects in the machine base itself

The machine base has hidden cracks, casting sand holes or uneven wall thickness, insufficient structural stiffness, and resonance caused by stress concentration during operation.

After repairing the machine base, the stress is not completely eliminated, or there are defects in the welds and reinforcement structure, resulting in abnormal vibration values.

3. Failure of internal transmission components

The planetary gear, sun gear, and internal gear ring are worn, corroded, or have excessive meshing clearance, which generates impact during transmission and is transmitted to the machine base through bearings.

Abnormal vibration occurs during operation due to bearing wear, ball damage, or insufficient lubrication, manifested as an increase in peak vibration at the bearing seat of the machine base.

The deformation of the planetary carrier and wear of the planetary shaft result in eccentricity of the planetary gear's revolution/rotation, causing overall vibration of the machine.

4. Working conditions and external factors

Overloaded operation, frequent start stop or impact load of equipment result in increased alternating stress and intensified vibration on the machine base.

The gearbox resonates with the driven equipment (with a vibration frequency close to the natural frequency of the machine base), causing a sharp increase in vibration values.

Lubricating oil deterioration, insufficient oil quantity, or inconsistent model can cause increased friction in transmission components, indirectly amplifying machine base vibration.