Enerpac Heavy Lifting Technology has developed a self-erecting facility hall (SEFH) for power generation plants that lack an on-site workshop, and manufacturing sites needing additional capacity. The hydraulically activated, 12.7-meter-high SEFH features a heavy-lift strand jack and ancillary crane, and is ideal for locations inaccessible to large cranes.
Many power generation plants in Africa and the Middle East are without on-site maintenance facilities needed to handle servicing of 12-meter-long, 3-meter-diameter turbine rotors weighing up to 70 tonnes. In addition, space restrictions close to the turbine hall can rule out access for large cranes needed to lift the rotor for inspection, and replacement of worn rotor blades.
The Enerpac SEFH is designed to offer plant operators and contractors a temporary facility to conduct essential maintenance on turbine rotors. Modular in construction, the SEFH can be readily assembled on-site, and it contains a strand jack for lifting and up-ending the rotor, as well as a 10-tonne overhead crane for changing the rotor blades and lifting ancillaries.
Assembly Made Easy
Weighing 130 tonnes and shipped in 19 shipping containers, the Enerpac SEFH is 30 meters long and 21.7 meters wide. It comprises six side units that are bolted together in two blocks of three. A cherry picker is used to assemble the side units, two mobile cross beams for the strand jack, the ancillary crane, and covered roof assembly. Both side walls are raised simultaneously using the side units’ integral hydraulic jacks, and the side-wall curtains added to provide a clean and weather-protected work area.
The strand jack and ancillary crane are mounted on rails allowing free movement along the entire length of the Enerpac SEFH. When deployed to a power plant, the turbine rotor is brought into the SEFH, and the strand jack used to up-end the rotor by 90 degrees, and suspend it for inspection and blade replacement.