Quick reconstruction method for three-dimensional model of water turbine blade

Abstract

The invention discloses a quick reconstruction method for a three-dimensional model of a water turbine blade. The method comprises the following steps: 1) acquiring blade point data; 2) fitting a blade profile in three-dimensional modeling software NX; the method has the advantages of being quick, efficient and adjustable in precision, real-time data processing can be conducted on quick reconstruction of the three-dimensional model of the blade through the method, external influences are low, the reliability and stability of the three-dimensional model of the blade are guaranteed, the cost isreduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a water turbine blade, in particular to a fast reconstruction method for a three-dimensional model of a water turbine blade. Background technique [0002] At present, the blade is the core component of the turbine, which has a very important impact on the conversion efficiency and stability of the turbine. The blades are affected by sediment wear and cavitation during the working process, and local damage or even fracture will appear to varying degrees after working for a period of time. Since the turbine blades are mostly complex free-form surfaces with complex shapes and large volumes, it is difficult to repair the blades by traditional methods of repairing waste parts such as welding and grinding; the blades are usually replaced after damage, so the 3D model reconstruction of the blades is very difficult. important. [0003] At present, the commonly used blade reconstruction method in engineering is mainly realized by the ...

AI Technical Summary

Problems solved by technology

Since the turbine blades are mostly complex free-form surfaces with complex shapes and large volumes, it is difficult to repair the blades by traditional methods of repairing waste parts such as welding and grinding; the blades are usually replaced after damage, so the 3D model reconstruction of the blades is very difficult. important

[0003] At present, the commonly used blade reconstruction method in engineering is mainly realized by the reverse molding method. After the laser scanning obtains the blade point data, it is modeled and post-processed. However, the laser sensor measures a large number of scattered point data, which cannot be processed in real time. At the same time, the measurement accuracy of the laser sensor is not high, and the measurement results are easily affected by environmental factors such as mechanical vibration, noise, light, and surface roughness of the part to be measured, and the measurement equipment is expensive, and the daily maintenance cost is high.

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