8H30 – 12H30 / 14h – 17H30 | from Monday to Friday
contact@tacquet-industries.fr
03 21 13 13 00
8H30 – 12H30 / 14h – 17H30
from Monday to Friday
contact@tacquet-industries.fr
03 21 13 13 00
Hydroelectric plant
Hermillon Hydroelectric Power Plant, France
Rehabilitation of groups (Francis types)
In 2021 and 2022, we intervened on the two groups (Francis types) of the Centrale
Hydroelectric power station in Hermillon, France. These operations were carried out in
the framework of the group rehabilitation by our client VOITH HYDRO.
Purpose of the intervention:
Machining of the different elements of the tarpaulin (between 1 and 1.5mm)
- Winnowing and boring plan
- Top installation plane and reference bore
- Top sealing plane and bore
- Lower sealing plane
- Lower installation plane
- Return of diameters Ø4105mm and Ø4115mm
Tolerances requested:
- Parallelism between machined planes: 0.05mm
- Bores: H8
- Surface Condition: Ra 3.2
Intervention performed :
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 machine in the 3D work environment).
- Step 2: Realization of pre-work checks (Laser Tracker) by our Surveyor department on site.
- Step 3: Installation of our machine on site and machining.
- Step 4: Realization of after-work checks (Laser Tracker) by an external company.
Fessenheim Hydroelectric Power Plant, France
Wheel coat machining (KAPLAN types)
In January 2022, we worked on the G4 Group (Kaplan type) of the Fessenheim Hydroelectric Power Plant, in France, for our client EDF. At the beginning of January 2024, our teams carried out an identical operation on Groupe G3 de la Centrale.
Purpose of the intervention:
Enlarge the cylindrical and spherical part of the existing wheel mantle by 3 mm radius, while copying the shape already present. The machining had to be done on a height of 1700mm.
Tolerances requested:
- Final side of cylinder and sphere: Ø6686mm 0.1 mm radius
- Surface Condition: Ra 3.2
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the turbine, study and calculations to determine the profile of our shape copying element, implementation of our machine in the 3D work environment).
- Step 2: Carrying out pre-work checks (Laser Tracker) by an external company.
- Step 3: Installation of our machine on site and machining.
- Step 4: Realization of after-work checks (Laser Tracker) by an external company.
Villerest Hydroelectric Power Station, France
Machining of the wheel coat after reloading
In June 2023, we worked on the G1 Group (Kaplan type) of the Villerest Hydroelectric Power Plant, in France, for our customer EDF.
Purpose of intervention:
Remanufacture the cylindrical and spherical part of the existing wheel mantle after reloading to return to the original shape and ribs. The portion to be taken back extended over a height of about 1000mm.
Tolerances requested:
- Final side of cylinder and sphere: Ø3400mm
- Surface Condition: Ra 3.2
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the turbine, study and calculations to determine the profile of our shape copying element, implementation of our machine in the 3D work environment).
- Step 2: Carrying out pre-work checks (Laser Tracker) by an external company.
- Step 3: Installation of our machine on site and machining.
- Step 4: Realization of after-work checks (Laser Tracker) by an external company.
The intervention is identical to that of the Fessenheim wheel mantle, but on a smaller diameter. A smaller machine was therefore used for this operation.
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.
Purpose of the intervention:
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)
Tolerances requested:
- Horizontality and flatness of machined planes: 0.02 mm/m Bores: H7 Floor depth: 0.1 mm
- Surface Condition: Ra 6.3
Intervention performed
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.
Revin Hydroelectric Power Plant, France
Rehabilitation of Group G4 (Francis type)
In mid-2023, we worked on the G4 Group (Francis type) of the Revin Hydroelectric Power Plant in France for our customer EDF.
Purpose of the intervention:
- Recovery of different turbine elements
- Return of the scope Ø2820 H7 on the wear part and change to diameter Ø2816 H7 after reloading
- Return of the scope Ø2875 H7 on the wear part side and change to diameter Ø2872 H7 after reloading
- Surface straightening perpendicular to span Ø2875 (1 to 3mm)
- Counter-drilling and tapping of 12 M16 holes for fixing the wear part
Tolerances requested :
- Cylindricity of diameters Ø2816 and Ø2872: 0.4 mm
- Coaxiality / Concentricity of diameters Ø2816 and Ø2872: 0.4 mm
- Perpendicularity of upright surface to diameter: 0.2 mm
- Straightened surface flatness: 0.3 mm
- Depth of drilling / tapping: 0.5 mm
- Surface condition: Ra 1.6 minimum
A complicated intervention given the difficulty of access as well as the machining carried out with the mounted wheel.
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the turbine and the wear part, 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.
Coo-Trois-Ponts Hydroelectric Power Station, Belgium
Rehabilitation of a Group (Francis type)
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
Intervention performed
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.
Bort-les-Orgues dam, France
TOP and VAD valve refurbishment
During 2023, we worked on the TOP valve and the VAD valve at the Bort-les-Orgues dam in France for our customer EDF.
Purpose of the intervention:
- Renovation of TOP valve fixed parts (machining of RG and RD surfaces on a height of 10m, installation of wear plates machined in our workshop, against drilling/ tapping of 100 M12 in RG and 100 M12 in RD for fixing these parts)
- Machining of VAD valve threshold knife to achieve sealing
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the TOP valve environment, implementation of our machines in the 3D work environment for the different operations).
- Step 2: Installation of our machines on site and machining.
Baigts Castetarbe factory, France
Turbine shaft machining
During 2023, we worked on a turbine shaft at the Baigts Castetarbe Hydroelectric Power Plant in France for our customer EDF.
Purpose of the intervention:
- Machining (delardage) of the shaft of 10mm at minimum radius over a length of 450mm
- Welding of 2 half shells (machined in our workshop) on the tree by an external company
- Machining of welded half-shells to obtain the final diameter Ø200
Tolerances requested:
- Diameter tolerance Ø200: 0.1 mm
- Conicity: (0; + 0.1 mm)
- Coaxiality: (0; + 0.2 mm)
- Surface condition: Ra 1.6 (obtained: 0.3/ 0.4)
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, 3D modeling of the tree, implementation of our machine in the 3D work environment).
- Step 2: Carrying out pre-work checks (Laser Tracker) by an external company to define the origins and create a reference.
- Step 3: Installation of our machine on site and machining.
- Step 4: Soldering half shells.
- Step 5: Realization of controls (Laser Tracker) by an external company in order to recover the repository and adjust the machine.
- Step 6: Installation of our machine on site and finishing machining.
- Step 7: Completion of after-work checks (Laser Tracker) by an external company.
Villarodin hydroelectric power station, France
Intervention on Stator of group G1
Our teams are currently working on the G1 group stator carcass of the Villarodin Hydroelectric Power Plant, in France, for our customer JEUMONT ELECTRIC.
Purpose of the intervention:
- Complete destruction of 50 key bars by milling (3.2 m high) respecting a rib established by the customer relative to the axis of the carcass
- 800 M10 drilling and tapping for fixing new bars
Tolerances requested:
- Rib of bars machined relative to carcass axis: 0.1 mm
Intervention performed
Our intervention took place in several stages:
- Step 1: Analysis of the subject in our Design Office (feasibility, implementation of our machines in the 3D working environment).
- Step 2: Carrying out pre-work checks (Laser Tracker) by an external company.
- Step 3: Installation of our machine on site and machining.
- Step 4: Realization of after-work checks (Laser Tracker) by an external company.
Kaplan Turbines (KAUNAS Lithuania)
Rehabilitation of a hydraulic plant
At the request of the Lithuanian Government, ALSTOM HYDRO carried out a rehabilitation project on the KAUNAS Hydroelectric Plant with the objective of increasing the performance of the four turbines.
For this purpose, ALSTOM HYDRO has selected TACQUET INDUSTRIES among the three companies in the world able to perform on-site machining operations. These operations were usually carried out in a heavy workshop.
TACQUET INDUSTRIES carried out the feasibility study, designed a specific machine unique in the world to execute various works on hydroelectric sites and achieved all the machining operations on the turbines.
“Runner Chamber” machining
ø 4900 to ø 6700
Height 2000
Turbines Francis (GENISSIAT France)
Installation et réusinage d’un blindage inox
Lors d’une maintenance turbine, au démontage de la roue Francis effectué par ALSTOM HYDRO, le client a constaté une cavitation extrêmement importante avec à certains endroits un percement total du blindage.
Pour garantir le redémarrage optimum de l’installation dans les délais prévus, ALSTOM HYDRO a contacté TACQUET INDUSTRIES afin de réaliser une étude faisabilité et effectuer les travaux dans le délai imparti.
Prestation réalisée en urgence
- Expertise et étude de faisabilité
- Définition des moyens
- Assemblage d’une machine spécifique
- Usinage de la zone cavitée
- Diamètre ø 4m075, Hauteur : 200
- Epaisseur d’usinage 8 mm
- Tolérance 0,15 mm
En collaboration avec ALSTOM HYDRO, TACQUET INDUSTRIES a installé et réusiné un blindage inox avec une précision de 0,1.
Turbines Francis (GURI Vénézuela)
Conception et réalisation de deux tours portatifs
Le barrage hydraulique de GURI, situé au centre du Vénézuela à proximité de PUERTA ORDAZ est le troisième plus important barrage hydraulique au monde et compte 16 turbines.
Le Gouvernement Vénézuélien a décidé de réhabiliter l’ensemble des installations du site en 2 phases dont la première a été confiée à ALSTOM HYDRO. Cette réhabilitation concerne 8 groupes sur un total de 16.
Antérieurement, les opérations de maintenance réalisées sur le site GURI avaient nécessité le démontage des pièces endommagées, leur transport dans le monde entier dans de multiples ateliers, leur retour au Vénézuela et au final, le remontage des pièces sur le site. L’ensemble de ces opérations représentait des délais d’intervention très long.
Afin d’accroitre l’efficacité d’intervention, ALSTOM HYDRO a étudié une démarche novatrice en proposant de réaliser l’ensemble des prestations directement sur le site de GURI avec des équipements d’usinage portables.
ALSTOM HYDRO, après étude a confié à TACQUET INDUSTRIE la conception et la réalisation de deux tours portatifs permettant d’usiner jusqu’à 8,5 mètres de diamètre.
Résumé de l’intervention TACQUET INDUSTRIE
- Conception et réalisation de tours deux portatifs de diamètre 8,5 mètres,
- Elaboration des équipements particuliers,
- Formation du personnel intervenant sur le site de GURI,
- Participation aux opérations d’usinage,
- Usinage des pièces fixes dans le puits,
- Usinage des pièces démontées.
Turbines Pelton - L'ARGENTIERE France
Usinage sur site
Dans le cadre de son programme de réhabilitation des Centrales Hydrauliques françaises, EDF a définit un certain nombre de sites prioritaires dont le Barrage LES CLAUX.
Après étude du Cahier des Charges EDF, TACQUET INDUSTRIES a élaboré une procédure permettant la réalisation des usinages sur site dans le respect des normes définies. Cette procédure a été retenue et validée par EDF.
Opérations réalisées par TACQUET INDUSTRIES
Alésage concentrique de deux diamètres de 1382 mm,
Surfaçage des deux faces parallèles du diamètre 1382 au diamètre 1560,
Tolérance : 5 /100 ème.
