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 […]
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 […]