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公开(公告)号：EP1593854A3
公开(公告)日：2010-01-13
申请号：EP05009949.8
申请日：2005-05-06
发明人： Inoue, Yasuhiro c/o Hitachi Industries Co., Ltd , Aki, Takashi c/o Hitachi Industries Co., Ltd. , Kawabata, Seiji c/o Hitachi Industries Co., Ltd. , Tanaka, Sadashi c/o Hitachi Industries Co., Ltd.
CPC分类号： F04D29/444 , F04D29/4213 , F04D29/4273 , F04D29/448 , F05D2250/51
摘要： The invention relates to a prewhirl type inlet casing for inducing a spiral stream in fluid comprising a suction passage (2) arranged on an upstream side, being orthogonal to a rotary shaft (1) of fluid machinery, and an internal passage (4) connected to the suction passage (2), the internal passage (4) being formed in a spiral shape so as to induce a swirl stream orthogonal to the rotary shaft (1) in the fluid. A guide vane (12) is provided in the fluid passage in the inlet casing. The guide vane (12) has a rectifying function capable of distributing flow rates in the swirl stream of the fluid in the internal passage (4) between the swirl center side and the swirl outer peripheral side and has a rectifying function capable of causing the fluid to deflect into the swirling direction of the swirl stream induced by the internal passage (4). With these rectifying functions, a rectified swirl stream can be easily created in the internal passage (4) so as to prevent occurrence of a deviation of a cavitations inducing zone. With this configuration, it is possible to effectively prevent occurrence of the deviation of the cavitations inducing zone in order to aim at simplifying the configuration of the internal passage (4).
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公开(公告)号：EP1593854A2
公开(公告)日：2005-11-09
申请号：EP05009949.8
申请日：2005-05-06
发明人： Inoue, Yasuhiro c/o Hitachi Industries Co., Ltd , Aki, Takashi c/o Hitachi Industries Co., Ltd. , Kawabata, Seiji c/o Hitachi Industries Co., Ltd. , Tanaka, Sadashi c/o Hitachi Industries Co., Ltd.
IPC分类号： F04D29/44
CPC分类号： F04D29/444 , F04D29/4213 , F04D29/4273 , F04D29/448 , F05D2250/51
摘要： The invention relates to a prewhirl type inlet casing for inducing a spiral stream in fluid comprising a suction passage (2) arranged on an upstream side, being orthogonal to a rotary shaft (1) of fluid machinery, and an internal passage (4) connected to the suction passage (2), the internal passage (4) being formed in a spiral shape so as to induce a swirl stream orthogonal to the rotary shaft (1) in the fluid. A guide vane (12) is provided in the fluid passage in the inlet casing. The guide vane (12) has a rectifying function capable of distributing flow rates in the swirl stream of the fluid in the internal passage (4) between the swirl center side and the swirl outer peripheral side and has a rectifying function capable of causing the fluid to deflect into the swirling direction of the swirl stream induced by the internal passage (4). With these rectifying functions, a rectified swirl stream can be easily created in the internal passage (4) so as to prevent occurrence of a deviation of a cavitations inducing zone. With this configuration, it is possible to effectively prevent occurrence of the deviation of the cavitations inducing zone in order to aim at simplifying the configuration of the internal passage (4).
摘要翻译： 本发明涉及一种用于在流体中诱导螺旋流的预旋流型入口壳体，包括设置在上游侧的与流体机械的旋转轴（1）正交的吸入通道（2）和连接到内部通道 所述内部通路（4）形成为螺旋状，从而在所述流体中产生与所述旋转轴（1）正交的旋流。 引导叶片（12）设置在入口壳体中的流体通道中。 引导叶片（12）具有能够在漩涡中心侧和涡流外周侧之间的内部通路（4）的流体的涡流中分配流量的整流功能，并且具有能够使流体 以偏转到由内部通道（4）引起的涡流的旋转方向。 利用这些整流功能，可以容易地在内部通路（4）中产生整流的涡流，以防止空化诱导区的偏离。 由此，为了简化内部通路（4）的结构，能够有效地防止空化诱发区域的偏离的发生。
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