Most of the impulse turbines that have been operated for many years have cracks in their buckets, and some will also have bucket dropping, which has seriously affected the safety and economic operation of the hydropower station. However, most of the bucket repairs are conducted on site, the treatment process is rough, and the quality is not guaranteed, which brings hidden dangers to the operation of the unit after maintenance.

Physical drawing of water turbine bucket

Physical drawing of water turbine bucket

Practical problems

      Fine cracks on the surface of water turbine bucket during long-term forced operation Water turbine is easy to form scale when operating in water for a long time, which has a great impact on the measured data

Site scanning diagram of water turbine bucket

Holon solutions 

Advantages of using hand-held 3D scanner
      ·Multi-line blue light laser scanning, high-precision data scanning, can reduce the surface defect features of the bucket 1 to 1 on the crack scanning with only a minute difference on the surface
      ·Fast scanning, powerful single-frame data capture capability, and obvious advantages in medium and large workpiece scanning
      ·Strong data operation ability and intelligent matching optimal algorithm greatly reduce the accumulated error of surface 3D data.

 STL data diagram of turbine bucket

 STL data diagram of turbine bucket