Redesigning and Manufacturing the Blades of the Low-Pressure Section of Steam Turbines

Product Introduction:

Steam turbine blades are considered important parts of the turbine. These blades convert the linear movement of steam with high temperature and pressure into the rotational movement of the turbine shaft. If these blades are broken, the unit will shut down. This issue will have many economic consequences for the power plant. The blades of the low pressure section of steam turbines usually have a height of more than 500 mm, and their end part includes a shroud. Damping wire is used in the middle part of these blades to reduce vibrations and the damage to the blade and, as a result, increase the working life of these blades. The main function of the damping wire is to dampen the forced vibrations during the operation of the turbine set, which passes through the airfoil hole of the blade.

Technical Specifications:

The steps of reverse engineering of these blades are as follows:

1. Selection of materials

2. Vector points / scanning the cloud of points

3. Modeling and preparation of cutting plan

4. Model control

5. Preparation of control map and dimensional tolerance

6. Design of construction and control fixture

7. Construction of construction and control fixtures

8. Programming and modifying the program

9. Cutting

10. Preparing the block with a milling machine

11. UT test

12. Prototype construction

13. Production

14. Cutting and size of the blade root

15. Dimensional control

16. Coding

17. Polishing

18. MT test

19. Pinning shot

20. Arranging the rows