CN2059192U - Low noise axial-flow blower - Google Patents

Low noise axial-flow blower Download PDF

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Publication number
CN2059192U
CN2059192U CN 89219249 CN89219249U CN2059192U CN 2059192 U CN2059192 U CN 2059192U CN 89219249 CN89219249 CN 89219249 CN 89219249 U CN89219249 U CN 89219249U CN 2059192 U CN2059192 U CN 2059192U
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CN
China
Prior art keywords
blade
flow blower
axial
low noise
utility
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 89219249
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Chinese (zh)
Inventor
任世瑶
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Shanghai Jiaotong University
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Shanghai Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN 89219249 priority Critical patent/CN2059192U/en
Publication of CN2059192U publication Critical patent/CN2059192U/en
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a low noise axial-flow blower which belongs to a ventilator in the field of fluid machinery pneumatic acoustics. The blades of present general axial-flow blower adopt a single circular-arc blade type designed by equal circulation negative index, and the present general axial-flow blower has the defects of multiple blade number, high specific pressure level, and high noise. The fan blade of the utility model adopts a non-single-circular-arc blade type designed by variable circulation negative index, and the utility model has the advantages of less blades and low noise. The blade profile is additionally provided with a plurality of circular arc-shaped convex and concave ribs, so the fundamental frequency and the sound power level of second harmonic are reduced. The low noise axial-flow blower is especially suitable for reforming traditional blowers to achieve the effects of noise reducing and energy saving. As for pipeline blowers, the casing can be made into two half pieces for convenient maintenance.

Description

Low noise axial-flow blower
Low noise axial fan belongs to ventilation equipment in the fluid machinery aeroacoustics field.
The general axis flow fan all is outer narrow interior wide blade profile both at home and abroad at present, and the number of blade is more relatively, than sound pressure level height, though or drive with higher rotation speed, as external T35-11,30K4-11, West Germany sieve cuts down blower fan, U.S. BAC, all there are poor efficiency, the high disadvantage of making an uproar in COLTD blower fan, the former making atmosphere of news service of Japanese Chi machine, and domestic silent ventilator is low because of rotating speed, blast is low, and application surface is narrow.It is big that old blower fan is all changed required expense.
Make an uproar in order to overcome existing blower fan poor efficiency, height, the shortcoming of big energy-consuming, and the old blower fan of traditional design carried out the noise reduction reducing energy consumption, the utility model blower fan adopts change circular rector negative exponent to design non-single circular arc profile, and the blade FC vane type line that is wide outside and narrow inside is non-single circular arc.On blade, be provided with the concavo-convex muscle of several circular arcs, can improve blade stiffness, reduce vane thickness, in order to saving aluminium.In order to reduce the tail eddy current, improve fan efficiency, in blade inner edge outlet port, blade one angle air-flow is crooked in the other direction.This blower fan adopts few number of blade, can replace original 4 blade blower fans with 2 blades, can replace former six blade blower fans with three blades, and original blower fan is undergone technological transformation, and only need the transposing blade, and the motor of former blower fan and shell can utilize all.
Needs are installed in pipeline fan in the pipeline, and for overhauling conveniently, this model utility blower fan can be made flow blower casing 2 half slit bamboo or chopped woods, and an end connects with hinge, and the other end connects with screw.Electric machine support is contained in rotatable half slit bamboo or chopped wood.
Fig. 1 is the low noise axial fan structural representation that shell can be made into two slit bamboo or chopped woods;
Fig. 2 is a low noise axial fan blade front view;
Fig. 3 is a low noise axial fan leaf type line chart.
1 is blade among the figure; The 2nd, electric machine support; The 3rd, shell; The 4th, hinge; The 5th, screw; The 6th, concavo-convex muscle; The 7th, the blade outer rim; The 8th, the blade inner edge; The 9th, blade inlet edge; The 10th, trailing edge; The 11st, the blade chord length; The 12nd, the maximum sagitta of blade.
The concrete enforcement of this model utility blower fan is, blower fan adopts and becomes the circular rector negative exponent and design non-single circular arc blade profile, and it is wide outside and narrow inside that blade is, and blade 1 outer rim 7 is wide, and inner edge 8 is narrow, and the maximum sagitta 12 of blade 1 molded lines is from blade inlet edge 9 30~45% chord length 11 places.On blade 1 profile, set up the concavo-convex muscle 6 of several circular arcs, at the B of blade inner edge 8 3C 2B 2It is once molding formed that (promptly crooked to air-flow) blade 1 usefulness alloy aluminium sheet is made and is bent downwardly at the place in the other direction.Blower fan adopts few number of blade, replaces the old blower fan of original 4 blades with two blades 1, replaces original six blade blower fans with three blades 1, and old blower fan is undergone technological transformation, and only need the transposing blade, and the shell of former blower fan and motor can utilize all.Flow blower casing 3 can be made 2 half slit bamboo or chopped woods to the pipeline fan that is installed in the pipeline for maintenance is convenient, an end connects with hinge 4, and an end connects with screw 5, and electric machine support 2 is contained in rotatable half slit bamboo or chopped wood, only need take screw 5 during machine maintenance apart, then around hinge 4 rotations.
This utility model blower fan, because fan blade adopts change circular rector negative exponent to design non-single circular arc blade profile, compare with the blower fan blade profile of traditional design, the pressure coefficient height, it is little to reverse loss, and noise is low, the efficient height, and set up the concavo-convex muscle of several circular arc types on the blade profile, can use thinner aluminium alloy plate and do not reduce blade stiffness, greatly saved aluminum alloy materials. Blade inner edge B3C 2B 2Make and be bent downwardly at the place, can reduce the tail eddy current, improves fan efficiency. Blower fan adopts few number of blade can reduce the acoustic power level of fundamental frequency and second harmonic, and noise significantly reduces. This utility model is specially adapted to the noise-reduction energy-saving transformation of the old blower fan of traditional design, only need the transposing blade, and the motor of former blower fan and shell can utilize all, have small investment, the characteristics that economic benefit is high. For pipeline fan, shell is made 2 half slit bamboo or chopped woods, is beneficial to maintenance.

Claims (3)

1, a kind of axial-flow blower that constitutes by motor, shell and blade, it is characterized in that fan blade 1 adopts the non-single circular arc blade profile that becomes the design of circular rector negative exponent, the maximum sagitta 12 of blade 1 molded lines is from blade inlet edge 930~45% chord lengths 11 places, set up the concavo-convex muscle 6 of several circular arcs on blade 1 profile, at the B of blade inner edge 8 3C 2B 2The place makes to air-flow crooked in the other direction, and flow blower casing 3 is made 2 half slit bamboo or chopped woods, and an end connects with hinge 4, and an end connects with screw 5, and electric machine support 2 is contained in rotating half slit bamboo or chopped wood.
2,, it is characterized in that blade 1 usefulness alloy aluminium sheet is once molding formed by the described axial-flow blower of claim 1.
3,, it is characterized in that fan blade 1 is 2 or 3 by the described axial-flow blower of claim 1.
CN 89219249 1989-12-09 1989-12-09 Low noise axial-flow blower Expired - Lifetime CN2059192U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 89219249 CN2059192U (en) 1989-12-09 1989-12-09 Low noise axial-flow blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 89219249 CN2059192U (en) 1989-12-09 1989-12-09 Low noise axial-flow blower

Publications (1)

Publication Number Publication Date
CN2059192U true CN2059192U (en) 1990-07-11

Family

ID=4874152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 89219249 Expired - Lifetime CN2059192U (en) 1989-12-09 1989-12-09 Low noise axial-flow blower

Country Status (1)

Country Link
CN (1) CN2059192U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007019796A1 (en) * 2005-08-19 2007-02-22 Junhao Lin A pressurized axial blower
WO2010069126A1 (en) * 2008-12-19 2010-06-24 常州祥明电机有限公司 Impeller of blower
CN102367810A (en) * 2011-05-25 2012-03-07 文兴纺织(苏州)有限公司 Low-noise fan
CN106996393A (en) * 2016-01-22 2017-08-01 日本斯频德制造株式会社 Possesses the cooling tower of axial fan
CN110410349A (en) * 2019-09-02 2019-11-05 李�诚 A kind of two-stage diagonal flow fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007019796A1 (en) * 2005-08-19 2007-02-22 Junhao Lin A pressurized axial blower
WO2010069126A1 (en) * 2008-12-19 2010-06-24 常州祥明电机有限公司 Impeller of blower
CN102367810A (en) * 2011-05-25 2012-03-07 文兴纺织(苏州)有限公司 Low-noise fan
CN106996393A (en) * 2016-01-22 2017-08-01 日本斯频德制造株式会社 Possesses the cooling tower of axial fan
CN106996393B (en) * 2016-01-22 2019-05-10 日本斯频德制造株式会社 The cooling tower for having axial fan
CN110410349A (en) * 2019-09-02 2019-11-05 李�诚 A kind of two-stage diagonal flow fan

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C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
RN01 Renewal of patent term
C17 Cessation of patent right
CX01 Expiry of patent term