| 摘要 |
<p>A blade body (1) comprised of hollow blades (2) and bridges provided therebetween has at least on the sides (3) of the hollow blades (2) mouldings extended perpendicularly to the blade back (4) and shaped as conduit cavities (7) or rib elevations (8). The mouldings (7) are extended perpendicularly to the blade back (4) of the hollow blades (2). The blade body (1) is mainly used in transformer tanks and is also used to cool active elements situated in a cooling liquid inside the tank. In the hollow blades (2) arranged perpendicularly, a cooling liquid flow is generated in parallel to the blade back (4). Despite the mouldings which are extended transversely with respect to the flow, the cooling action of known hollow blades is similar to that of the mouldings parallel to the flow. The advantage of the mouldings extended transversely with respect to the flow is the following: contrary to the mouldings parallel to the flow, the mouldings transversal to the flow may be produced without additional control mechanisms or installations before or during the bending of the hollow blades. </p> |
