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我矿四个生产井口主要扇风机都是仿苏 B_2-B 型和 CTд-57B 型离心式的。随着产量的提高和生产水平的下延对主扇也提出了更高的要求。因此,对这类风机进行改造,挖掘其潜力,以满足生产发展的需要就成为重要课题。根据上述情况,对照国产的4—72—11型风机的结构特点,在1976年首先对一井井下辅扇 B_2—B14~#离心式扇风机进行改造。在原风机机壳结构尺寸的基础上,用国产4—72—11,16~#风机叶轮代替原14~#叶轮。这种叶轮具有10个机翼形断面的后向斜切叶片,焊
Mine four production wellhead fan are mainly imitation Su B_2-B and CTд-57B centrifugal. With the increase of production and the decline of production level, the main fan also put forward higher requirements. Therefore, the transformation of such fans, tap their potential to meet the needs of the development of production has become an important issue. According to the above-mentioned situation, in contrast with the structural features of domestic 4-72-11 fan, in 1976, the first one downhole auxiliary fan B_2-B14 ~ # centrifugal fan was modified. On the basis of the size of the original fan shell structure, domestic 4-72-11,16 ~ # fan impeller instead of the original 14 ~ # impeller. This impeller has 10 wing-shaped cross-section of the rear beveled blades, welding