论文部分内容阅读
多机组引水式电站,出于经济上的原因,常采用单元或多元分组引水,到末端设岔管(分水器)向各机组供水。是常见的引水型式。岔管即引水道的分岔管段,为相交管组成的壳体结构。各管相交处,均有部份管壳被切除,破坏了管壳完整的圆环形,造成了不平衡力区。过去常设加强结构承担这些不平衡力,如在交线区设置加强板或梁,对大型岔管多采用外加强的三梁岔管。外加强梁岔管的加强结构,在内水压力作用下,主要承受弯曲,材料得不到充分利用。随着引水道的P、D(P-内水压力,D-内径)值的增大,加强梁的尺寸非常庞大,
Multi-unit water diversion power station, for economic reasons, often using unit or multi-group diversion, to the end of the manifold (water separator) to each unit water. Is a common type of diversion. Bifurcation is the diversion of the bifurcation of the pipe section, composed of intersecting shell structure. At the intersection of the pipes, some of the pipe shells were cut off, which destroyed the complete annular shape of the pipe shell and caused the unbalanced force area. In the past, there were always strengthened structures that assumed these unbalanced forces. For example, stiffeners or beams were installed in the cross-boundary area. Three-beam bifurcated pipes were mostly used for large bifurcated pipes. External strengthening beam bifurcation of the strengthening structure, under the effect of internal water pressure, the main bear bending, the material can not be fully utilized. With the increase of P and D (P-internal water pressure and D-inner diameter) of the diversion channel, the size of the strengthened beam is very large,