Borgforsen is a small 26MW hydroelectric power plant on the Fjällsjöälven River in central Sweden, equipped with Kaplan turbines. Two tasks: line boring of holes for guide Vvanes turning the spherical part of the rotor chamber. Insofar as reaming is a standard activity and performed by us many times, the turning of the spherical part was for the first time made with a new machine of our own construction.
Rana Power Plant is located near the town of Mo I Rana, in central Norway . It operates with installed capacity of 500 MW in four units with Francis turbines, with an average annual production of about 2100 GWh. The station is owned by Statkraft. In terms of annual production in Norway, the Rana power plant is second to the Svartisen hydroelectric power plant. Photo: Rana Power Plant outside and inside In our range there was machining of axuial, radial and conical surfaces within the head coverthe bottom ring. A certain challenge was to turn the over five-ton machine by 180° without access to the crane – only with the help of hoists. This operation can be seen in the video:
As every year, in addition to renewing the extended* scope of periodic OHS training, 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 issues: Wound management, Cardiopulmonary resuscitation (CPR), Use of an Automatic External Defibrillator (AED) Training program: Call for help – launch of the emergency medical system, the role of the witness of the event in the chain of survival Own safety, the victim, the place of the incident. Unconscious victim – dangers resulting from loss of consciousness, safe position. Cardiopulmonary resuscitistion: adult, child. Choking – first aid in choking […]
As usual in such tasks, the work consists not only in obtaining the proper surfaces, but also in obtaining the appropriate tolerance of the position of two surfaces relative to each other. Therefore, the most important are the measurements carried out properly, which result not only in the current geomentry but also in the value of corrections taken into account during milling.
Nalubaale Power Station, formerly known as Owen Falls Dam, is a hydroelectric power station across the White Nile near to its source at Lake Victoria in Jinja district. Its Location coordinates are: Latitude= 0.443525, Longitude= 33.1847 respectively. It is the oldest hydropower station in Uganda commissioned in 1954. It was renamed Nalubaale by H.E Excellency Yoweri Kaguta Museveni, the president of Uganda in 2001. Originally Owen falls dam was designed for ten turbines rated at 15 megawatts (20,000 hp) each (a total of 150 megawatts (200,000 hp). In the the 1990s, the station was refurbished to repair the accumulated wear from a decade of civil disorder. During the repairs, the […]
Repair of the flange frame after surfacing in the gas tank wagon
Regeneration consists in machining out the material at the point of contact with the nut in the plate on both sides of the hole for the actuator. Material losses are replaced with inserts. 4 pcs. new, turned inserts will be mounted in the grooves and screwed with screws. In future renovations, it is enough to replace the inserts.
Multi-bucket excavators working in open-pit mines are one of the largest mobile devices in the world. A characteristic element is a bucket wheel, often with a diameter exceeding 20 m. And it was the bearing seat of the bucket wheel that was the subject of our concern. It is clear that the time and cost of dismantling the bucket wheel would be gigantic, which is why the only solution became mobile machining. On the surface, this is a standard work, one obstacle in this case was a spigot with a diameter of Ø630, impossible to disassemble, and located in the center of the Ø1100 socket (an element with holes around the perimeter). The size of this journal also significantly limited the working space of the machine tool. Modification of the machine tool and the use of additional fasteners were required.
The Toktogul hydropower plant (HPP), with an installed capacity of 1.2GW, is the biggest power plant in Kyrgyzstan accounting for approximately 40% of the country’s power output. The plant generates approximately 6,000GWh of electricity a year using four vertical Francis turbines of 300MW each. A joint venture of GE Hydro (France) and GE Renewables (Switzerland) was awarded a turnkey contract worth $104m for the Toktogul hydropower plant rehabilitation project. Our participation in this project is the surfaces machining of the upper ring and the lower ring. Due to the location (5000 km), apart from technical challenges, the project was a huge logistical challenge. The machining Power Station and landscapes
Due to the erosion and corrosion wear of the old blades, the customer decided to replace them. For this purpose, we made a number of 3D laser measurements and scans to redesign the casting as well as the finished machining. The individual stages are presented in the diagram: In the same way, the steering vanes were recreated. More about reverse engineering: MEASUREMENT TECHNIQUE AND REVERSE ENGINEERING | WWTECH – On site machining
