Menomonee Falls, WI — Enerpac has developed a Self-Erecting Facility Hall (SEFH) for power generation plants that lack an on-site workshop and for manufacturing sites needing additional capacity. The hydraulically actuated, 12.7m high SEFH features a heavy lift strand jack and auxiliary hoist and is ideal for locations inaccessible to large cranes.
Many power generation plants in Africa and the Middle East lack the on-site maintenance facilities needed to handle servicing of 12m long, 3m diameter turbine rotors which can weigh up to 70T. In addition, space restrictions close to the turbine hall often 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 contains a strand jack for lifting and up-ending the rotor, as well as a 10T overhead crane for changing the rotor blades and lifting ancillaries.
Smooth, Integrated Assembly
The SEFH is quite a large structure measuring 30m long x 21.7m wide and weighing 130T yet still ships in 19 standard shipping containers. The building consists of six side units that are bolted together in two blocks of three. A small crane is used to assemble the side units, two mobile cross beams for the strand jack and auxiliary crane respectively as well as the covered roof assembly. During assembly, both side walls are raised simultaneously using the side units’ integral hydraulic jacks and the side wall curtains are added to provide a clean and weather protected work area.
The strand jack and auxiliary crane are mounted on rails allowing free movement along the entire length of the SEFH. When deployed at a power plant, the turbine rotor is brought into the SEFH, up-ended by the strand jack crane to 90 degrees, and then suspended for inspection and blade replacement.
“The Enerpac SEFH combines a heavy lift capability with a covered temporary work environment for applications, where crane access is impractical,” says Mart Hinnen, Enerpac Heavy Lifting Technology. “It has performed well and is proving to be a valuable addition to the rotor service options for many gas power plants.”
