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Qairakkum, Tajikistan

Qairakkum, Tajikistan

Kayrakkum Dam (Russian: Кайраккумская ГЭС; Tajik: НБО Қайроққум), also spelled differently as Kayrakum, Kairakum, Qayraqqum or Qayroqqum, is a dam on the Syr Darya River near the city of Kayrakkum in Sughd Province, Tajikistan. It is located on the western edge of the Fergana Basin and forms the Kayrakkum Reservoir. The reservoir supplies water for irrigation, mainly in Uzbekistan in the lower reaches of the river, and for the production of hydropower. The power plant has an installed capacity of 126 MW and is operated by the state-owned operator Barki Tojik. Construction of the dam began in 1952. Six units with Kaplan turbines were commissioned in 1956 and 1957. The power plant is currently undergoing modernization and renovation, aimed at increasing the power plant’s capacity from 142 to 174 MW. At the invitation of GE, the supplier of new turbosets, we perform machining on subsequent six blocks. We have just finished work on unit 5, the second of six being machined by ours. There are four more blocks ahead of us. In the scope of machinig: machining of the upper and lower ring, faces and cyllindrical surfaces, […]

Bujagali HPS, Uganda

Bujagali HPS, Uganda

Bujagali Power Plant is a hydroelectric power plant on the Victoria Nile, a place considered the beginning of the great Nile River – near the beautiful Bujagali Falls in Uganda. Construction began in 2007 and was completed in 2012. The power plant has a capacity of 250 megawatts. The Bujagali Power Plant was uganda’s largest source of energy when it was commissioned. GE supplied all electromechanical equipment – including five Kaplan turbine-generator units with a capacity of 50 MW each, control and protection systems and other power plant equipment. GE’s Kaplan turbines feature adjustable rotor blades and adjustable steering blades that enable them to efficiently deliver power over a wide range of flows, where river flows vary greatly depending on the season. More about power plant equipment: Bujagali – Flawless project execution | GE Renewable Energy About the Bujagali hydropower project – AKDN This time, at the invitation of GE, we performed […]

Borgforsen, Sweden

Borgforsen, Sweden

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.

Mo I Rana, Norway

Mo I Rana, Norway

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:

First aid training

First aid training

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 […]

Milling of the screw press body

Milling of the screw press body

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 HPS, Uganda

Nalubaale HPS, Uganda

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, […]

Regeneration of sockets for hydraulic punch cylinders

Regeneration of sockets for hydraulic punch cylinders

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.      

Excavator in KWB Bełchatów

Excavator in KWB Bełchatów

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.