APPLICATION RESEARCH ON EVALUATION OF AERO-ENGINE BLADE PROFILE PARAMETERS

The geometrical size of the aeroengine blade profile are mainly measured by coordinate measuring machines. And then the parameters are evaluated by software analysis. Now the software for evaluating blade parameters mainly includes products of companies such as Renishaw, Hexagon, Zeiss, and Geomagic. By using the same coordinate measuring machines (CMM) and different software to carry out the comparative experiment of measuring the parameters of model and actual blade with the contour section, the method for experimenting and comparing with the algorithms of the blade profile parameter is proposed. It expounds the general parameters, general algorithms and the magnitude of data discrepancy of measurement software. The experiment results show that Hexagon and Renishaw are more comprehensive than Zeiss and Geomagic in terms of parameter algorithms. On the other hand, the contour of the actual blade is not perfect curve, which leads to errors in measurement, so that the deviation of the evaluation value of the parameters on the actual blade is much larger than that on the model.