Fuel cell centrifugal compressor rotor configuration optimization design method

Abstract

The invention belongs to the field of turbomachinery optimization design. The invention particularly relates to a fuel cell centrifugal compressor rotor configuration optimization design method. The method comprises the following specific steps: in the configuration optimization design process of the centrifugal compressor rotor, rotor aerodynamic stiffness, aerodynamic damping, electromagnetic stiffness and electromagnetic damping changes caused by fluid excitation of an impeller air gap, a bearing air film and sealing gas and electromagnetic excitation factors of a motor rotor are considered; and optimization calculation is performed on the rotor configuration parameters by using a support vector regression machine and an adaptive multi-target grey wolf algorithm, and thus finally obtaining uniformly distributed non-dominated solutions as the rotor configuration parameters. According to the invention, a flow field and electromagnetic excitation are included in dynamic response influence factors for a motor integrated direct drive structure and light weight requirements of the fuel cell centrifugal compressor rotor, the maximum stress and deformation of a rotor part are reduced under the condition that mass constraints are met, the structural dynamic reliability of the fuel cell centrifugal compressor is improved, and the service life of the fuel cell centrifugal compressor isprolonged.

Description

technical field [0001] The invention belongs to the field of optimization design of turbomachinery, in particular to a method for configuration optimization design of a fuel cell centrifugal compressor rotor. Background technique [0002] Fuel cells for vehicles are a new field of application of centrifugal compressors. Under vehicle conditions, the rotors of ultra-high-speed centrifugal compressors are forced to vibrate due to unbalanced mass, and at the same time, they are affected by fluid forces such as impeller air gap force, bearing air film force, and sealing force. The action produces self-excited vibration, coupled with the requirement of lightweight fuel cells, the compressor rotor generally adopts a high-speed motor direct drive structure, and the rotor is also affected by electromagnetic force, and its vibration response presents complex dynamic behavior, which may induce vibration and cause major accidents . Therefore, the optimal design of the compressor rotor...

AI Technical Summary

Problems solved by technology

Because the relationship between the rotor configuration parameters and the stiffness and damping data caused by the corresponding excitation is not considered, the dynamic calculation model of the rotor structure is inconsistent with the actual situation, resulting in deviations in the optimization direction of the rotor configuration, and the mechanical properties of the optimized rotor cannot meet the expected indicators. Evaluation of Dynamic Reliability of Rotor Structure

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