CN104500448A - Axial flow cooling tower fan - Google Patents
Axial flow cooling tower fan Download PDFInfo
- Publication number
- CN104500448A CN104500448A CN201410762829.5A CN201410762829A CN104500448A CN 104500448 A CN104500448 A CN 104500448A CN 201410762829 A CN201410762829 A CN 201410762829A CN 104500448 A CN104500448 A CN 104500448A
- Authority
- CN
- China
- Prior art keywords
- blade
- support plate
- cooling tower
- blower fan
- axial flow
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an axial flow cooling tower fan. One end of a propeller hub is fixedly arranged on the output shaft of a speed reducer, and a support plate is fixedly arranged on the outer circle of the other end of the propeller hub, wherein each cambered hoop is fixedly arranged on the support plate according to the distribution positions of blades on the propeller hub, the upper surface of the bottom wall of each cambered hoop is an inclined surface of which an inclination angle is an included angle alpha between centrifugal force generated by the fan and the corresponding blade, and the bottom wall of each cambered hoop is fixedly arranged on the support plate in a way that the thin position of the bottom wall is positioned on the outer circle of the support plate; each blade consists of a blade shank at the root, a hollow enclosure and a wing beam in the enclosure; the blade shank of each blade is arranged in the corresponding cambered hoop, then is buckled to the cambered hoop through two clamping rings, and is fixedly arranged on the support plate through a U-shaped bolt clamped to the clamping ring and two relatively locked nuts fixedly arranged on the U-shaped bolt. According to the axial flow cooling tower fan, the bending moment of aerodynamic force on the blade shanks can be effectively reduced, so that the fan can run more safely and reliably; simplicity and convenience in angle regulation and blade mounting and dismounting are achieved.
Description
Technical field
The present invention relates to a kind of axial flow blower fan of cooling tower.
Background technique
Blower fan of cooling tower product is widely used in the cooling tower of the national economy every profession and trade circulating water cooling systems such as oil, electric power, chemical industry, metallurgy, mine.In recent years, along with constantly improving and development and the needs that maximize of blower fan of cooling tower technology, production structure is simple, easy installation and removal, safe and reliable, low cost of manufacture blower fan, become blower fan manufacturer and must consider and the problem solved.The each blade of existing blower fan is arranged on wheel hub by petiole, support plate and U bolt etc., at right angle setting between blade and wheel hub, because blower fan is subject to gravity and aerodynamic impact at operation process Leaf, petiole is subject to the effect of unbalanced force for a long time, creates stress and concentrates, and the shearing force that petiole is subject to is greater than strength of materials performance, so easily cause petiole to fracture, have impact on the Security of blower fan, reduce the working life of blade, thus shorten the working life of blower fan.
Summary of the invention
Object of the present invention solves the above-mentioned problems in the prior art exactly, a kind of moment of flexure that effectively can reduce aerodynamic force and produce petiole is provided, thus make the running that blower fan can be more safe and reliable, and angle modulation, installation and removal blade axial flow blower fan of cooling tower simply and easily.
For achieving the above object, technical solution of the present invention is: a kind of axial flow blower fan of cooling tower, and it comprises motor, transmission shaft, retarder, oil ga(u)ge assembly, fan protection device, wheel hub, support plate, multiple blade, the arc-shaped clamp of stator blade, snap ring and U bolt; Retarder is fixed on the transmission shaft of motor, and propeller hub one end is fixed on the output shaft of retarder, and the cylindrical of the other end is fixed with support plate; Each arc-shaped clamp is fixed on support plate according to the distribution locations of blade on propeller hub, the plane of inclination of the upper surface of its diapire angle α that to be angle of inclination be between centrifugal force that blower fan produces and blade, the mode that its diapire is positioned at the cylindrical of support plate with its thin position is fixed on support plate; Blade is made up of the spar in the petiole of root, hollow casing and shell; The petiole of each blade is placed in arc-shaped clamp respectively, then is buckled on arc-shaped clamp by two snap rings, is then fixed on support plate with the nut of the two relative lockings be fixed on U bolt by the U bolt being connected to snap ring.
The shell of blade described above from blade root to blade in the middle part of vertical cross-section A be all prismatic rain drop shapes, in the middle part of blade to the vertical cross-section B of blade afterbody be tilt to intercept the little part of the width of vertical cross-section A be also the cross section formed after upper part diminish gradually like rain drop shapes, shell is 1.5 °-5.5 ° to the angle of inclination beta of the upper-end surface of blade afterbody in the middle part of blade, and the best is 3.5 °.When the blade of this aerofoil profile can reduce running, the generation of eddy current, makes air-flow more stable; Make that compressor flow is large, efficiency is high, stable, noise is low.
The ramped bottom surface of arc-shaped clamp described above is fixed on support plate by holding down bolt and locking nut.
Angle α described above is 2 °-4 °.
Ideally, when blower fan is at operation process Leaf stress balance, as shown in Figure 1, following formula can be drawn:
F
from× sin α × L=(F
gas+ G) × cos α × L
(formula 1)
Obtained by (formula 1): cot α=F
from/ (F
gas+ G) (formula 2)
F
fromthat blower fan rotates the centrifugal force produced, F
gasbe the power that air produces, G is the gravity of blade, and α is F
fromand the angle between blade, L is the half of length of blade; So, just can calculate F according to provided fan performance parameter
fromand F
gas, just can be calculated the mounted angle α value of blade by (formula 2), be generally 2 °-4 °.
Installation angle between blade and support plate is the angle α between the centrifugal force that produces of blower fan and blade, that is when the installation angle between blade and wheel hub is 90 ° of-α, when blower fan in the running, due to blade and the angled α of level, so centrifugal force F
fromcreate component F
from× sin α, aerodynamic force F
gascomponent (F is jointly created with gravity G
gas+ G) × cos α, ideally, when blower fan operation process Leaf stress balance, the component moment of flexure that centrifugal force produces is equal with the component moment of flexure that aerodynamic force and gravity produce jointly, namely F
from× sin α=(F
gas+ G) × cos α, the moment of flexure that namely petiole place is subject to balances, so petiole place does not have stress to concentrate, petiole is no longer subject to shearing force, the generation of the situation that there will not be petiole to fracture.
Each blade of the present invention is to become the tilt angle of angle α to be arranged on support plate with support plate fixing on wheel hub; Effectively can reduce the moment of flexure that aerodynamic force produces petiole, thus make the running that blower fan can be more safe and reliable, add the working life of blade, thus add the working life of blower fan.The present invention not only makes blade reliable clamping, and angle modulation, installation and removal blade are simple and convenient.
Through simulation test and comprehensive force analysis, intensity of the present invention is high, with short production cycle, and manufacturability is good, can safe enough, steadily, reliably operate.
Accompanying drawing explanation
Fig. 1 is the present invention force analysis figure when working;
Fig. 2 is plan view of the present invention;
Fig. 3 is plan view of the present invention;
Fig. 4 is the plan view that Leaf petiole of the present invention is arranged on propeller hub;
Fig. 5 is the AA sectional view of Fig. 4;
Fig. 6 is the plan view of arc-shaped clamp in the present invention;
Fig. 7 is the CC sectional view of Fig. 6;
Fig. 8 is the plan view of U bolt in the present invention;
Fig. 9 is the plan view of snap ring in the present invention;
Figure 10 is the plan view of Leaf of the present invention;
Figure 11 is the BB sectional view of Figure 10.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10 and Figure 11, the present embodiment comprises motor 8, transmission shaft 7, retarder 5, oil ga(u)ge assembly 6, fan protection device, wheel hub 3, support plate 2, multiple blade 1, the arc-shaped clamp 9 of stator blade 1, snap ring 16 and U bolt 10.Retarder 5 is fixed on the transmission shaft 7 of motor 8, and propeller hub 3 one end is fixed on the output shaft 4 of retarder, and the cylindrical of the other end is fixed with support plate 2 by bolt 21.Each arc-shaped clamp 9 is fixed on support plate 2 according to the distribution locations of blade 1 on propeller hub 3, the plane of inclination of the upper surface of its diapire 17 angle α that to be angle of inclination be between centrifugal force that blower fan produces and blade, angle α is any angle between 2 °-4 ° according to calculation of design parameters; Its diapire 17 is positioned at the cylindrical of support plate 2 mode with its thin position is fixed on support plate 2 by holding down bolt 13 and locking nut 14.Blade 1 is made up of the spar 22 in the petiole 15 of root, hollow casing 18 and shell 18.The petiole 15 of each blade 1 is placed in arc-shaped clamp 9 respectively, be buckled on arc-shaped clamp 9 by two snap rings 16 again, be then fixed on support plate 2 by the nut 12,11 of the U bolt 10 with the two relative lockings be fixed on U bolt 10 that are connected to snap ring 16 and lock washer 13; 22 mounting holes of U bolt 10 for arc-shaped clamp 9 bottom surface 17 has.The shell 18 of described blade 1 from blade root 18 to blade in the middle part of 19 vertical cross-section A be all prismatic rain drop shapes, in the middle part of blade 19 to the vertical cross-section B of blade afterbody 20 be tilt to intercept the little part of the width of vertical cross-section A be also the cross section formed after upper part diminish gradually like rain drop shapes, shell 18 19 is any angle 1.5 °-5.5 ° to the angle of inclination beta of the upper-end surface of blade afterbody 20 in the middle part of blade, and the best is 3.5 °.
Above-described embodiment is only preferred and exemplary, and those skilled in the art can do equivalent technologies according to the spirit of this patent and improve, and these all covered by the protection domain of this patent.
Claims (6)
1. an axial flow blower fan of cooling tower, it comprises motor, transmission shaft, retarder, oil ga(u)ge assembly, fan protection device, wheel hub, support plate and multiple blade; Retarder is fixed on the transmission shaft of motor, and propeller hub one end is fixed on the output shaft of retarder, and the cylindrical of the other end is fixed with support plate; It is characterized in that: it also comprises the arc-shaped clamp of stator blade, snap ring and U bolt; Each arc-shaped clamp is fixed on support plate according to the distribution locations of blade on propeller hub, the plane of inclination of the upper surface of its diapire angle α that to be angle of inclination be between centrifugal force that blower fan produces and blade, the mode that its diapire is positioned at the cylindrical of support plate with its thin position is fixed on support plate; Blade is made up of the spar in the petiole of root, hollow casing and shell; The petiole of each blade is placed in arc-shaped clamp respectively, then is buckled on arc-shaped clamp by two snap rings, is then fixed on support plate with the nut of the two relative lockings be fixed on U bolt by the U bolt being connected to snap ring.
2. axial flow blower fan of cooling tower according to claim 1, it is characterized in that: the shell of described blade from blade root to blade in the middle part of vertical cross-section A be all prismatic rain drop shapes, in the middle part of blade to the vertical cross-section B of blade afterbody be tilt to intercept the little part of the width of vertical cross-section A be also the cross section formed after upper part diminish gradually like rain drop shapes, shell in the middle part of blade to the angle of inclination beta of the upper-end surface of blade afterbody be 1.5 °-5.5 °.
3. axial flow blower fan of cooling tower according to claim 2, is characterized in that: the shell of described blade in the middle part of blade to the angle of inclination beta of the upper-end surface of blade afterbody be 3.5 °.
4. the axial flow blower fan of cooling tower according to claim 1 or 2 or 3, is characterized in that: the ramped bottom surface of described arc-shaped clamp is fixed on support plate by holding down bolt and locking nut.
5. axial flow blower fan of cooling tower according to claim 4, is characterized in that: angle α described above is 2 °-4 °.
6. the axial flow blower fan of cooling tower according to claim 1 or 2 or 3, is characterized in that: described angle α is 2 °-4 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762829.5A CN104500448A (en) | 2014-12-14 | 2014-12-14 | Axial flow cooling tower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762829.5A CN104500448A (en) | 2014-12-14 | 2014-12-14 | Axial flow cooling tower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104500448A true CN104500448A (en) | 2015-04-08 |
Family
ID=52941882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410762829.5A Pending CN104500448A (en) | 2014-12-14 | 2014-12-14 | Axial flow cooling tower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492145A (en) * | 2017-12-26 | 2020-08-04 | 三菱电机株式会社 | Rotating blade, axial flow fan and ceiling fan |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1019437C2 (en) * | 2001-11-26 | 2003-05-27 | Ventilatoren Sirocco Howden Bv | Fan rotor blade with flap, has flap section with cross section defining two different angle geometry regions |
| CN2823617Y (en) * | 2005-07-22 | 2006-10-04 | 盛才良 | Large axial flow fan with zero bending monent structure blade root |
| CN101832285A (en) * | 2010-04-29 | 2010-09-15 | 上海尔华杰机电装备制造有限公司 | Fan impeller for cooling |
| CN101858361A (en) * | 2010-05-19 | 2010-10-13 | 威海克莱特菲尔风机有限公司 | Axial-flow impeller having blade hinged with wheel hub |
| CN102588340A (en) * | 2012-04-01 | 2012-07-18 | 上海尔华杰机电装备制造有限公司 | Fan impeller with preset taper angle |
| CN204805159U (en) * | 2014-12-14 | 2015-11-25 | 惠阳航空螺旋桨有限责任公司 | Axial compressor cooling tower fan |
-
2014
- 2014-12-14 CN CN201410762829.5A patent/CN104500448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1019437C2 (en) * | 2001-11-26 | 2003-05-27 | Ventilatoren Sirocco Howden Bv | Fan rotor blade with flap, has flap section with cross section defining two different angle geometry regions |
| CN2823617Y (en) * | 2005-07-22 | 2006-10-04 | 盛才良 | Large axial flow fan with zero bending monent structure blade root |
| CN101832285A (en) * | 2010-04-29 | 2010-09-15 | 上海尔华杰机电装备制造有限公司 | Fan impeller for cooling |
| CN101858361A (en) * | 2010-05-19 | 2010-10-13 | 威海克莱特菲尔风机有限公司 | Axial-flow impeller having blade hinged with wheel hub |
| CN102588340A (en) * | 2012-04-01 | 2012-07-18 | 上海尔华杰机电装备制造有限公司 | Fan impeller with preset taper angle |
| CN204805159U (en) * | 2014-12-14 | 2015-11-25 | 惠阳航空螺旋桨有限责任公司 | Axial compressor cooling tower fan |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492145A (en) * | 2017-12-26 | 2020-08-04 | 三菱电机株式会社 | Rotating blade, axial flow fan and ceiling fan |
| CN111492145B (en) * | 2017-12-26 | 2022-04-05 | 三菱电机株式会社 | Rotating blade, axial flow fan and ceiling fan |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |