The unusual task of reaming the existing, twisted central hole in the shaft of the generator rotor was carried out in accordance with the customer’s requirements. The task was to ream the holes Ø81 to Ø90, with the maintenance of a new hole in the shaft axis. Also a challenge was the required roughness Ra = 0.8 µm. And above all, the depth: more than 2000 mm! The task was carried out using a modified BB6000 machine tool, equipped with an appropriate mounting system and a spindle bearing system in the hole according to our concept. Metrological supervision – the reliable Laser Tracker – ensured ongoing alignment corrections and continuous […]

Our last major project took place in an unusual place – in Tyrol. The site of the project was the Malta pumped-peak power plant installed in the Kölnbrein, on Lake Speicher Kölnbrein. Not only are the landscapes unheard of, the plant design is also remarkable. Kölnbrein Dam with Malta Hydroelectric Power Station and Observation Deck and Lake Speicher Kölnbrein; the dam is 200 m high (the highest in the country), a crown with a length of 626 m and a width of 7.6 m, at a base of 41 m and a volume >2,000,000 m3; dam tank: 200.000.000m3. Malta Oberstufe and its Galgenbichl power plant are a pumped-peak power plant […]

The Hydro tab has appeared in the main menu of the website, where you can find information about our activities in the field of hydropower.

Once again, all WWtech employees take part in first aid courses organized by WENA Konsulting. The course program, in addition to standards (BLS – Basic Life Support), covers the following topics: • Wound management, • Cardiopulmonary resuscitation (CPR), • Using the Automated External Defibrillator (AED). Automated external defibrillator (AED) – a highly specialized, reliable, computerized device that, by voice and visual commands, guides both people with and without medical training through a safe defibrillation procedure in cardiac arrest. Cardiopulmonary resuscitation in combination with defibrillation within 3-5 minutes of loss of consciousness can allow effective resuscitation in 49-75% of cases, and every minute of defibrillation delay reduces the likelihood of survival […]

Two casings for regeneration, which consisted in turning the internal diameter (about 300mm), and then mounting the stainless steel lining (bushings). An interesting fact is that the sleeves-linings were made of a typical pipe with a slightly larger diameter, by cutting an appropriate part of the pipe circumference along a radial line. This allowed the cladding to fit tightly inside the casings. Tooling was also made for assembly, which allowed to close the circumference of the cladding and push it inside the casing. The effect meets the customer’s expectations.

At the power plant located on the Turkish Riviera, GE has modernized the turbosets, consisting in the complete replacement of high- and medium-pressure modules. The remaining elements of the turbine had to be adapted to the new modules. Our scope of work was relatively wide, including supervision of the work carried out by a local subcontractor. Milling the foundation for sliding plates Grooves of bearings 1 and 2 Installation of the insertion Supervision of the machining of the bottom parts of the bearing pedestals. Bearing grooves No. 3,4,5, and 6 Machining the casing for blade carriers

We are pleased to announce that the project described in the article:https://wwtech.com.pl/en/2020/10/23/modernization-of-the-turbine-casing-screw-connection/has been successfully completed! In addition to measurements, the analysis of the casing shape geometry and machining, WWtech also produced all fasteners: studs, bolts and cap nuts, including the design of new bolts replacing the existing studs.

Part of the cold rolling line. Our task was to mill the bed to get the right surface parameters – shape tilt, flatness, roughness and the reciprocal position of the left and right side.

In addition to large projects (e.g. https://wwtech.com.pl/en/2020/01/29/two-milling-machines-in-action/ ), WWtech also provides a wide range of small mobile machining services Removal of broken/seized bolts and studs, even in hard-to-reach areas. Sometimes the thread is also damaged, then we offer a number of repair techniques. Some of them were already presented in the article: https://wwtech.com.pl/en/2019/06/24/repair-of-threaded-holes-2/ The choice of the optimal m.in method depends on: nominal thread size, screw and body materials, reasons for breaking or blocking, possible deformation, further use of the thread (e.g. oversizing) access to the place Regeneration of the groove under the sealing ring. The crushed section of the edging was restored by a weld by the Customer and […]