CN204805159U - Axial compressor cooling tower fan - Google Patents
Axial compressor cooling tower fan Download PDFInfo
- Publication number
- CN204805159U CN204805159U CN201420783382.5U CN201420783382U CN204805159U CN 204805159 U CN204805159 U CN 204805159U CN 201420783382 U CN201420783382 U CN 201420783382U CN 204805159 U CN204805159 U CN 204805159U
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- blade
- fixed
- arc
- blower fan
- support plate
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Abstract
The utility model discloses an axial compressor cooling tower fan, propeller hub one end is fixed on the output shaft of reduction gear, is fixed with the extension board on the excircle of the other end, each arc clamp according to the distribution rigidity of blade on the propeller hub on the extension board, the upper surface of the diapire of arc clamp is the inclined plane, and inclination is the centrifugal force of fan production and the contained angle alpha between the blade, and the diapire of arc clamp is fixed at the extension board with the mode that its thin position is located the excircle of extension board, the spar of blade in by the petiole of root, hollow shell and shell is constituteed, the petiole of each blade is detained on the arc clamp by two snap rings in placing the arc clamp respectively in again, then is fixed on the extension board at the U of snap ring type bolt and the double -phase nut of fixing on U type bolt to locking by the joint. The utility model discloses can effectually reduce the moment of flexure that aerodynamic force produced to the petiole to make fan safe and reliable's operation more, and angle modulation, installation and dismantlement blade are simple and convenient.
Description
Technical field
The utility model 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.
Model utility content
The purpose of this utility model 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 utility model 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 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 upper surface of the diapire of arc-shaped clamp is plane of inclination, and angle of inclination is the angle α between the centrifugal force of blower fan generation and blade, and the mode that the diapire of arc-shaped clamp 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 each vertical cross-section A uniform section; Each vertical cross-section B to blade afterbody in the middle part of blade diminishes gradually, is each cross section formed after tilting to intercept the little part of the width of each vertical cross-section A i.e. upper part; 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 °.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 utility model 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 utility model 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 utility model is high, with short production cycle, and manufacturability is good, can safe enough, steadily, reliably operate.
Accompanying drawing explanation
Force analysis figure when Fig. 1 is utility model works;
Fig. 2 is plan view of the present utility model;
Fig. 3 is plan view of the present utility model;
Fig. 4 is the plan view that the utility model Leaf petiole 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 utility model;
Fig. 7 is the CC sectional view of Fig. 6;
Fig. 8 is the plan view of U bolt in the utility model;
Fig. 9 is the plan view of snap ring in the utility model;
Figure 10 is the plan view of the utility model Leaf;
Figure 11 is the BB sectional view of Figure 10.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is 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 upper surface of 9 diapires 17 of arc-shaped clamp is plane of inclination, and angle of inclination is the angle α between the centrifugal force of blower fan generation and blade, and angle α is any angle between 2 °-4 ° according to calculation of design parameters.The diapire 17 of arc-shaped clamp 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 23 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 to blade in the middle part of 19 each vertical cross-section A uniform section, rain drop shapes.In the middle part of blade, 19 to each vertical cross-section B of blade afterbody 20 diminish gradually, and each cross section formed after the part little for the width tilting to intercept each vertical cross-section A i.e. upper part, 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 °.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.
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 upper surface of the diapire of arc-shaped clamp is plane of inclination, and angle of inclination is the angle α between the centrifugal force of blower fan generation and blade, and the mode that the diapire of arc-shaped clamp 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, is characterized in that: the shell of described blade from blade root to blade in the middle part of each vertical cross-section A uniform section; Each vertical cross-section B to blade afterbody in the middle part of blade diminishes gradually, is each cross section formed after tilting to intercept the little part of the width of each vertical cross-section A i.e. upper part; 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: described angle α 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 |
|---|---|---|---|
| CN201420783382.5U CN204805159U (en) | 2014-12-14 | 2014-12-14 | Axial compressor cooling tower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783382.5U CN204805159U (en) | 2014-12-14 | 2014-12-14 | Axial compressor cooling tower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204805159U true CN204805159U (en) | 2015-11-25 |
Family
ID=54589994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420783382.5U Active CN204805159U (en) | 2014-12-14 | 2014-12-14 | Axial compressor cooling tower fan |
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| Country | Link |
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| CN (1) | CN204805159U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500448A (en) * | 2014-12-14 | 2015-04-08 | 惠阳航空螺旋桨有限责任公司 | Axial flow cooling tower fan |
| CN109139548A (en) * | 2018-10-16 | 2019-01-04 | 广州合众富华节能环保科技有限公司 | A kind of blower fan of cooling tower blade mechanism |
-
2014
- 2014-12-14 CN CN201420783382.5U patent/CN204805159U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500448A (en) * | 2014-12-14 | 2015-04-08 | 惠阳航空螺旋桨有限责任公司 | Axial flow cooling tower fan |
| CN109139548A (en) * | 2018-10-16 | 2019-01-04 | 广州合众富华节能环保科技有限公司 | A kind of blower fan of cooling tower blade mechanism |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |