Kod ovih ogromnih idu sporije jer su ogromni:
In the design and installation of hydroelectric generators, special attention is devoted to reinforcing the rotating parts of the hydroelectric unit, as well as to cooling the windings of the rotor and stator. According to the positioning and design of the support bearing or step bearing, a distinction is made between suspended and hooded generators. In the suspended generator the support bearing, which receives the weight of the rotating parts of the hydroelectric unit, as well as the axial pressure of the water on the turbine runner, is positioned above the generator’s rotor, on the upper cross-piece of the unit. In the hooded generator the step bearing is positioned under the generator rotor, on a lower crosspiece or on the turbine casing; the generator shaft rotates in two or three guide bearings. High-capacity, low-speed hydroelectric generators are usually very large; the hooded model is effective in reducing their dimensions and in decreasing their weight. An example of the hooded type is the generator of the Krasnoiarsk Hydroelectric Power Plant. Its speed of rotation is 93.8 rpm, and its rotor is 16 m in diameter and weighs 1,640 tons. The suspended design is preferable for smaller highspeed generators; as compared with the hooded type, it has greater resistance to the mechanical vibrations of the rotor, its supporting step bearing is of smaller diameter, and it is simpler to install. An example is the hydroelectric generator of the Bratsk Hydroelectric Power Plant. Its speed of rotation is 125 rpm, and its rotor is 10 m in diameter and weighs 1,450 tons.
Bila bi frka ukočiti 1450 tona.
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( padanja težeg ) pod uticajem gravitacije ne bi ni bilo vetra, jel tako.
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