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公开(公告)号：US20160238019A1
公开(公告)日：2016-08-18
申请号：US15021572
申请日：2014-09-11
申请人： HITACHI, LTD.
CPC分类号： F04D29/286 , F04D17/12 , F04D27/007 , F04D29/284 , F04D29/30 , F04D29/441 , F04D29/464 , F17D1/07
摘要： A centrifugal compressor 200 used in a gas pipeline 1 has a centrifugal impeller provided with a hub and a plurality of blades. The blade angle distribution of the blade is configured such that a hub side blade angle is maximum on the side closer to a hub side leading edge than a central point of a hub side camber line, and from this part to the hub side leading edge, a hub side blade angle distribution curve is convex in a blade angle increasing direction. Further, the blade angle distribution is configured such that a counter-hub side blade angle is minimum at a counter-hub side leading edge of the counter-hub side camber line, or on the side closer to the counter-hub side leading edge than a central point of a counter-hub side camber line, and in an arbitrary section of the counter-hub side blade angle distribution curve including a part where the blade angle is minimum, the counter-hub side blade angle distribution curve is convex in a small blade angle direction, and in a section from the downstream side of the section where the counter-hub side blade angle distribution curve is convex to the counter-hub side trailing edge, the counter-hub side blade angle distribution curve is convex in a large blade angle direction. With this arrangement, it is possible to obtain a gas pipeline centrifugal compressor in which the low flow-rate side operating range is expanded and a high flow-rate side operating range is maintained.
摘要翻译： 在气体管道1中使用的离心式压缩机200具有设置有毂和多个叶片的离心式叶轮。 叶片的叶片角度分布被构造成使得毂侧叶片角度在比轮毂侧弯曲线的中心点更靠近轮毂侧前缘的一侧上，并且从该部分到轮毂侧前缘， 轮毂侧叶片角度分布曲线在叶片角度增加方向上是凸的。 此外，叶片角度分布被配置为使得相对毂侧翼片角度在对中轮毂侧弯曲线的相对毂侧前缘处或在更靠近对中毂侧前缘的一侧最小， 在相对侧毂侧弯曲线的中心点，并且在包括叶片角度最小的部分的对中毂侧叶片角度分布曲线的任意部分中，相对毂侧叶片角度分布曲线在 小叶片角度方向，并且在相对侧毂侧叶片角度分布曲线凸起到相对毂侧后缘的部分的下游侧的截面中，对中毂侧叶片角度分布曲线在 大叶片角度方向。 由此，能够得到低流量侧运转范围扩大且维持高流量侧运转范围的气体管路离心式压缩机。
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