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1. CN104053910 - Inducer

Office
China
Application Number 201380005774.7
Application Date 17.01.2013
Publication Number 104053910
Publication Date 17.09.2014
Grant Number 104053910
Grant Date 23.11.2016
Publication Kind B
IPC
F04D 29/18
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
F04D 29/24
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
22specially for centrifugal pumps
24Vanes
CPC
F04D 29/2277
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
18Rotors
22specially for centrifugal pumps
2261with special measures
2277for increasing NPSH or dealing with liquids near boiling-point
F01D 5/145
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
5Blades; Blade-carrying members
12Blades
14Form or construction
141Shape, i.e. outer, aerodynamic form
145Means for influencing boundary layers or secondary circulations
F04D 29/384
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
26Rotors specially for elastic fluids
32for axial flow pumps
38Blades
384characterised by form
Applicants 株式会社荏原制作所
Inventors 渡边启悦
Agents 北京市金杜律师事务所 11256
北京市金杜律师事务所 11256
Priority Data 2012-008333 18.01.2012 JP
Title
(EN) Inducer
(ZH) 诱导轮
Abstract
(EN) The present invention pertains to an inducer having multiple blades of the same shape, wherein the shape of the inducer enables optimal stabilization of cavitation behavior. This inducer has multiple blades of the same shape, with the tip-side blade load being greater at the front half of the blade than at the rear half. When the blade angle from the circumferential direction of the inducer is betab(degrees) and the meridian plane distance is m (millimeters), the blade angle increase rate dbetab/dm is 0.2 or greater from the blade front edge to the dimensionless meridian plane position 0.15 on the tip side, and is 0.25 or greater from the blade front edge to the dimensionless meridian plane position 0.15 at the mid-span.
(ZH) 本发明涉及在具有多个同一形状的叶片的诱导轮中,能够使气穴的动作稳定性最佳化的诱导轮形状。诱导轮具有同一形状的多个叶片,其中,叶尖侧的叶片负荷在叶片的前半部比叶片的后半部大,在设诱导轮的从周向的叶片角度为βb(度),设子午面距离为m’(毫米)时,叶片角度增加率dβb/dm’在叶尖侧从叶片前缘到无量纲子午面位置0.15为0.2以上,并且在中间跨度中从叶片前缘到无量纲子午面位置0.15为0.25以上。