Malta Hydroelectric Power Plant

Malta Hydroelectric Power Plant

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 […]

Automated external defibrillator

Automated external defibrillator

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 […]

Regeneration of pump casings

Regeneration of pump casings

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.

Modernisation of turboset in Turkey

Modernisation of turboset in Turkey

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

Modernization of the turbine casing screw connection Part 2

Modernization of the turbine casing screw connection Part 2

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.

Minor renovations

Minor renovations

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 […]

Regeneration of the telescopic connection

Regeneration of the telescopic connection

Telescopic bushings are a very important and responsible element of the steam admission system in the steam turbines due to the extreme operating conditions (even 540 °C, 20-30 MPa). The seal typically consists of a set of multi-edge seals to seal the coaxial portions of the intake pipeline. The reason for using such a solution is the possibility of installing the inner casing in the outer one, as well as compensation of thermal expansion of the elements. This time, the task was to machine heavily worn-out sleeves to new diameters. While stationary machining of such an element is trivial, fulfilling the design requirements of machining in the mobile version, including […]

Drilling in Iraq

Drilling in Iraq

We finished the work on the modernization of the gas turbine, where our task was a.o. very difficult drilling for the casings’ retaining elements. The problem we had to face is the difficult position of drilling – on the edge between two different materials, with a step or drilling into the halve of the old hole. Since the holes were arranged around the perimeter, some of them were also drilled in the ceiling position. Drilling diagram and example of the appearance of the hole before drilling Drilling in the ceiling position The finished hole and the dowel Punching a new hole