Features of balancing of rotors of turbo-compressors of automotive and tractor engines during repairs
Abstract
Features of balancing of rotors of turbo-compressors of automotive and tractor engines during repairs
Incoming article date: 20.12.2018The rotor shaft of the turbocharger is the part that determines the life of the bearing unit. Various methods of restoring the working capacity of the rotor shaft have been developed. The most common of them-treatment for repair size and applying a layer of metal coating in various ways. After that, the rotor shaft is subjected to dynamic balancing, in order to ensure the minimum allowable imbalance. Stands on the basis of microprocessor-based two-plane balancing device PB-02M are widely used in the repair industry at the present time. The article deals with the process of dynamic balancing of restored rotors. The features of this process in relation to the conditions of repair production are noted. This is a large range of repaired units and the instability of the size of the bearing surfaces after the restoration. It is necessary to adjust the balancing device for each rotor. The case in which the initial rotor imbalance is much higher than the permissible one is also considered. It is necessary to carry out balancing in several stages. Pre-balancing - this is the first stage. Then the final balancing is made to the permissible imbalance value. The article presents a general algorithm for balancing rotors on balancing stands equipped with a measuring system based on the device PB-02M. The presented approach in the application of the measurement system allows to balance the parts with the required accuracy. This will ensure a high post-repair life of the repaired unit and the whole unit.
Keywords: turbocharger, rotor, repair, restoration, machine, balancing, adjustment, unbalance, device, algorithm