| 摘要 |
<p>PURPOSE:To simplify the welding operation, by forming thick-walled parts on the side edges on the runner crown side and on the runner band sides of the runner vane of a hydraulic machine, and by manufacturing the runner by electroslag process. CONSTITUTION:Thick-walled parts 4, 5 are formed on the side edges of a runner vane 1 on the runner crown 2 side and on the runner band 3 side. The thickness of the thick-walled part 4, 5 is made uniform along the length of the runner vane 1. Then, water-cooled copper patches 6 are fitted to the runner vane from both sides of the thick-walled part 4, and an electrode wire is inserted into the space between the runner vane 1 and the runner crown 2 for welding. According to this method, welding operation is simplified without generation of cracks caused by the heat during welding.</p> |
