April 2023 - Tacquet-Industries

Coo-Trois-Ponts Hydroelectric Power Station, Belgium

Rehabilitation of a Group (Francis type)

During the year 2023, we intervened on one of the groups (Francis type) of the Hydroelectric Plant of Coo-Trois-Ponts, in Belgium. These operations were carried out as part of a group rehabilitation project by our customer VOITH HYDRO.

GOAL
ACHIEVEMENT

Machining of the following at the spiral sheet:
Ø2286 (+1; +2) at 219 mm height (material removal: 12.7 mm)
Ø2365 H7 on a height of 30 mm (material removal: 36.3 mm)
Ø2444 H7 on a height of 110 mm (material removal: 2.8 mm)
Ø2485 H7 on a height of 141 mm (material removal: 10.5 mm)
Surfacing from diameter Ø4572 to diameter Ø4660 and creating a groove Ø4603 after reloading
Surfacing flange cylindrical door and creation of throat
Surfacing frame holder vacuum cleaner

Our intervention took place in several stages:

Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the spiral cover, the cylindrical door and the vacuum cleaner door frame, implementation of our machines in the 3D work environment for the different operations).
Step 2: Carrying out pre-work checks (Laser Tracker) by an external company.
Step 3: Installation of our machines on site and machining.
Step 4: Realization of after-work checks (Laser Tracker) by an external company.

3D MODELLING

The valve environment is 3D modeled in accordance with the customer’s original plans

MACHINE SETUP & MACHINING

OVERVIEW AFTER WORK

PrevPreviewTurbine machining (Francis type) 𝘖𝘛𝘛𝘔𝘈𝘙𝘚𝘏𝘌𝘐𝘔

NextRehabilitation of group G4 (Francis type) 𝘙𝘌𝘝𝘐𝘕Next

Apr 11 2023

Turbine machining (Francis type) 𝘖𝘛𝘛𝘔𝘈𝘙𝘚𝘏𝘌𝘐𝘔

PrevPreviewRehabilitation of groups (Francis type) 𝘏𝘌𝘙𝘔𝘐𝘓𝘓𝘖𝘕

NextRehabilitation of a group (Francis type) 𝘊𝘖𝘖Next

Ottmarsheim Hydroelectric Power Plant, France

Recovery of different turbine elements

During 2023, we worked on the G1 Group (Kaplan type) of the Ottmarsheim Hydroelectric Power Station, in France, for our customer VOITH HYDRO.

GOAL
TOLERANCES REQUESTED
ACHIEVEMENT

Recovery of different turbine elements Flange and Ø6050 H7 of the foundation ring Surfacing of the upper face of the lower ring (Ø6900 to Ø8700) then machining of the face and diameter Ø6900 Undercoating of headgear (Ø6900 to Ø8700) Addition of modifications on the 48 sealing pots (drilling-tapping, facing)

Horizontality and flatness of machined planes: 0.02 mm/m Bores: H7 Floor depth: 0.1 mm
Surface Condition: Ra 6.3

Our intervention took place in several stages:

Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the turbine, implementation of our machines in the 3D work environment for the different operations).
Step 2: Carrying out pre-work checks (Laser Tracker) by an external company.
Step 3: Installation of our machines on site and machining.
Step 4: Realization of after-work checks (Laser Tracker) by an external company.

3D MODELLING

The planing and boring operations to be carried out require two positions for our first machine (low position and high position) as well as several configurations.

The additional modifications for sealing the 48 guide pots require different machines and assemblies (boring machine for the screeds and magnetic drill for the tapping-holes).