公开(公告)号：US20120171014A1

公开(公告)日：2012-07-05

申请号：US13343006

申请日：2012-01-04

申请人： Takahide Nagahara ,  Daichi Torii ,  Tetsuya Yoshida

发明人： Takahide Nagahara ,  Daichi Torii ,  Tetsuya Yoshida

IPC分类号： F04D13/14 ,  F04D3/00

CPC分类号： F04D17/125 ,  F04D1/063 ,  F04D29/4206 ,  F04D29/426 ,  F04D29/441 ,  F04D29/445 ,  F05D2250/52

摘要： A barrel-type multistage pump with uniformed velocity distribution in an axial direction, on a cross-section of a rotating flow channel, to suppress fluid loss in a last stage, and including: plural stages of centrifugal impellers, covered by an inner casing; diffusers and return channels provided on downstream sides of said centrifugal impellers, to guide the flow of a fluid to a centrifugal impeller in the next stage, and return vanes arranged at respective return channels; a cylindrical outer casing having a suction pipe and a discharge pipe, wherein a cylindrical rotating flow channel connected to a discharge opening is provided between an outer casing and an inner casing, a connecting channel to connect between a rotating flow channel and diffusers.

摘要翻译： 一种桶形多级泵，其在轴向上具有均匀的速度分布，在旋转流动通道的横截面上，以抑制最后阶段的流体损失，并且包括：多级离心式叶轮，被内壳覆盖; 设置在所述离心式叶轮的下游侧的扩散器和返回通道，以将流体引导到下一级中的离心式叶轮，以及布置在相应返回通道处的返回叶片; 具有吸入管和排出管的圆柱形外壳，其中在外壳和内壳之间设置有连接到排出口的圆筒形旋转流动通道，连接在旋转流动通道和扩散器之间的连接通道。

公开(公告)号：US09249804B2

公开(公告)日：2016-02-02

申请号：US13343006

申请日：2012-01-04

申请人： Takahide Nagahara ,  Daichi Torii ,  Tetsuya Yoshida

发明人： Takahide Nagahara ,  Daichi Torii ,  Tetsuya Yoshida

IPC分类号： F04D1/06 ,  F04D17/12 ,  F04D29/44 ,  F04D29/42

CPC分类号： F04D17/125 ,  F04D1/063 ,  F04D29/4206 ,  F04D29/426 ,  F04D29/441 ,  F04D29/445 ,  F05D2250/52

摘要： A barrel-type multistage pump with uniformed velocity distribution in an axial direction, on a cross-section of a rotating flow channel, to suppress fluid loss in a last stage, and including: plural stages of centrifugal impellers, covered by an inner casing; diffusers and return channels provided on downstream sides of said centrifugal impellers, to guide the flow of a fluid to a centrifugal impeller in the next stage, and return vanes arranged at respective return channels; a cylindrical outer casing having a suction pipe and a discharge pipe, wherein a cylindrical rotating flow channel connected to a discharge opening is provided between an outer casing and an inner casing, a connecting channel to connect between a rotating flow channel and diffusers.

摘要翻译： 一种桶形多级泵，其在轴向上具有均匀的速度分布，在旋转流动通道的横截面上，以抑制最后阶段的流体损失，并且包括：多级离心式叶轮，被内壳覆盖; 设置在所述离心式叶轮的下游侧的扩散器和返回通道，以将流体引导到下一级中的离心式叶轮，以及布置在相应返回通道处的返回叶片; 具有吸入管和排出管的圆柱形外壳，其中在外壳和内壳之间设置有连接到排出口的圆筒形旋转流动通道，连接在旋转流动通道和扩散器之间的连接通道。