A dynamic characteristic-based control method for the rotor unbalance of turbocharger

Abstract

The invention discloses a turbocharger rotor unbalance amount control method based on dynamic characteristics. The method comprises the steps that a turbocharger rotor bearing system dynamics finite element solid model is built; (2) different unbalance amount excitation modes are applied to the dynamics finite element solid model, and vibration responses and stability rules of turbocharger rotor unbalance position, size and phase difference to the measuring points of two bearings are summarized; (3) the optimum allocation scheme of unbalance excitation on the rotor position, size and phase difference is determined with the minimum root-mean-square value of the vibration amplitude as the judging criteria; (4) turbocharger rotor structure parameters are optimized until the vibration amplitudes at the positions of the two turbocharger rotor bearings are the minimum and the stability at the positions of the two turbocharger rotor bearings is the best. According to the turbocharger rotor unbalance amount control method, unbalance control is applied in the turbine end and air pressing end structure design and manufacturing process, stable and efficient running of the whole machine can be achieved, and unbalance vibration faults caused in the rotor running process are effectively reduced.

Description

technical field [0001] The invention belongs to the field of turbocharger dynamics and vibration control, in particular to a method for controlling the unbalanced amount of a turbocharger rotor based on dynamic characteristics. Background technique [0002] Turbocharging technology is an important way for vehicles to save energy and reduce consumption. At present, exhaust gas turbocharging technology has been widely used in engines. Supercharging has become an effective measure to improve engine power, economic benefits and emission standards. Facing new changes in energy supply and demand patterns and new trends in international energy development, based on my country's basic National conditions, focusing on the scientific development concept, keeping up with the new trend of international energy technology, coupled with the low production cost of turbochargers for small vehicles and the effective use of exhaust gas to drive turbines to make energy recycling a key technology...

AI Technical Summary

Problems solved by technology

However, the rotor unbalance control method has always had few solutions, especially for the special high-speed microstructure of the turbocharger.

After the design of the turbocharger, the manufacturer or factory performs high-speed dynamic balancing to balance the rotor system, or the dynamic balancing measures are carried out after the design is completed. It has not been considered in the turbocharger design and manufacturing process, resulting in the need for unbalanced vibration control during the actual working process of the turbocharger, resulting in excessive vibration of the turbocharger, reduced performance, and even increased unnecessary production maintenance cost

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