Nowadays, rotating machinery uses rotors. In order to ensure the balance of the rotor, it is necessary to use a dynamic balancing machine. Only rotors and equipment that have been verified by the dynamic balancing machine can be put into use, allowing users to rest assured.
The uneven distribution of rotor mass is one of the most important factors causing rotor imbalance. In actual production and work processes, there are four main reasons for the uneven distribution of rotor mass:
1. The issue with the manufacturing material or blank of the rotor. In mechanical engineering, we encounter many rotor imbalances caused by the material itself. For example, when casting a rotor, uneven density distribution of the raw materials themselves, sand holes, porosity in the cast blank, and uneven distribution of welds and other defects can all lead to rotor imbalance to some extent.
2. The rotor experiences imbalance during long-term operation. During high-speed rotation, the rotor may experience wear, deformation, and other phenomena. At the same time, temperature changes may cause the rotor to deform during operation. In addition, centrifugal force during operation causes relative displacement between parts, which breaks the original equilibrium state. Over time, significant vibration will occur.
3. The problem of rotor machining and assembly leads to imbalance. During the processing and installation of the rotor, there are machining accuracy errors and installation errors that can affect the quality distribution of the rotor around the axis, resulting in rotor imbalance.
4. The imbalance of the rotor during maintenance. During the maintenance process, normal technical repairs such as disassembly and replacement of components may also result in uneven distribution of rotor mass. The impact of these on the balance state of the rotor cannot be determined, with varying degrees of severity. Therefore, in order to ensure the normal operation of the rotor, we must perform dynamic balancing on the rotor after each maintenance and repair.
In rotating machinery, the rotor is a very important component, so to ensure uniform mass distribution of the rotor, it is necessary to use a dynamic balancing machine for calibration. According to the GB/T6444-1995 standard, the cause of rotor imbalance is caused by uneven distribution of rotor mass. During the rotation process, the rotor generates centrifugal force, which mainly acts on the bearings to cause mechanical vibration.