Method for integrally and dynamically balancing cantilever rotor with impeller

Abstract

The invention relates to a method for integrally and dynamically balancing a cantilever rotor with an impeller. By the design of a pneumatic driving device, a dynamic balance tool, a stator support and an air pressure control device, the dynamic balance tool is mounted by simulating a mounting mode of a rotor on an engine, a vibration value transmitted by a mounting supporting point of the rotor on the engine is really measured, a high-pressure air source is led in through the pneumatic driving device, and driving accuracy and stability are improved. The influence of uncertain factors such as belt transmission elasticity unstable tension and irregular change of dynamic balance magnitude caused by repeated disassemble and assembly of the rotor is eliminated, the whole unbalance magnitude of the rotor is directly used for assembly without decomposition after meeting design requirements, and use stability and reliability of products are improved.

Description

technical field [0001] The invention relates to a dynamic balancing method, in particular to an integral dynamic balancing method of a cantilever rotor with an impeller. Background technique [0002] A cantilever rotor is a component that is suspended at one end and rotates during work to generate or transmit power. Some cantilever rotors are in operation, because the cantilever part is long, the weight is heavy, and the rotational speed of the rotor is high, so the requirements for dynamic balance are also high. For example, in an aero-engine, the working state of its core rotor is a cantilever state, and the weight and length ratio of the cantilever is large. The lengths of the cantilever part and the support installation part of the largest core rotor are 203mm and 96mm, and the weight is 13.5Kg and 1.5mm. Kg, that is, the length ratio is about 2.1, and the weight ratio is about 9. Its dynamic balance accuracy requirements are high, and the maximum dynamic balance weight...

AI Technical Summary

Problems solved by technology

Dynamic balancing is carried out on the existing belt-driven dynamic balancing machine. There are many unstable factors such as the cantilever weight of the rotor at low speed, the reaction force of the remote support, the bearing clearance, and the tension of the belt. The comprehensive influence of irregularities cannot be overcome, making the balance Poor stability and poor repeatability; and due to the limitation of the rotor structure of the core machine, there is no place for belt drive, so the overall dynamic balance cannot be performed. The rotating parts must be dynamically balanced first. It is impossible to measure the dynamic balance. Practice has proved that in the process of disassembly and reassembly, repeated disassembly and assembly of the end teeth will cause double and irregular dynamic balance values ​​to increase, resulting in multiple complete machines vibrating and unusable.