激光扫描系统在水轮机逆向工程中的应用

水轮机转轮叶片的修复是水轮机检修中的重要工作,采用传统方法进行叶片修复很难保证修复精度。基于数字化扫描获得水轮机转轮的点云数据,采用逆向工程的方法建立转轮的数学模型,可指导水轮机叶片的精确修复。以小浪底水电站水轮机备用转轮为对象,采用激光跟踪仪和关节臂式三坐标测量机建立复合扫描系统,通过对转轮进行数字化扫描,获得水轮机转轮全面的点云数据,从而建立水轮机转轮三维数字化模型。模型数据为水轮机转轮叶片的精确修复提供了量化依据,该方法对大型设备的精确测量也具有现实意义。

Application of Laser Scanning System in Water turbine Reverse Engineering

Repair of water turbine blades is an important work in water turbine maintenance. The traditional method is difficult to ensure the repairing accuracy. The mathematical model of water turbine is able to accurately guide blades repairing, which established by reverse engineering using the point cloud data that obtained by digital scanning. Taking the reserve runner of Xiaolangdi hydropower station for an research object, the laser tracker and articulated arm three coordinate measuring machine are used to establish the complex scanning system. The comprehensive point cloud data of runner are obtained by using digital scanning. Thus, three dimensional digital model of runner is established. The precise model data provides quantitative basis to accurate repair of water turbine blades. This method also has practical significance in the accurate measurement of other large equipment.