CN203175976U - Blade used for fan - Google Patents
Blade used for fan Download PDFInfo
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- CN203175976U CN203175976U CN 201220735722 CN201220735722U CN203175976U CN 203175976 U CN203175976 U CN 203175976U CN 201220735722 CN201220735722 CN 201220735722 CN 201220735722 U CN201220735722 U CN 201220735722U CN 203175976 U CN203175976 U CN 203175976U
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Abstract
The utility model relates to blade used for a fan. The blade comprises a body and a cylindrical connecting handle part, wherein the body is hollow, one end, close to the connecting handle part, of the body is a blade root, one end, far away from the connecting handle part, of the body is a blade point, the connecting handle part is fixedly connected with the blade root, and therefore the body can rotate under the driving of the connecting handle part; the body further comprises a windward part and a leeward part, the windward part is transferred to the leeward part in a smooth mode, and the contour of the cross section of the end portion of the windward part and the contour of the cross section of the end portion of the leeward part are wave-shaped. According to the blade used for the fan, the thickness of the blade, the contour of the windward part, the contour of the leeward part, the torsion angle of the body, the bent angle of the type of the blade and a geometrical inlet angle are improved, and therefore a pneumatic state of a traditional blade can be improved, not only can generated blade vortex be reduced, but also overall noise of an air blower is reduced, the air amount of the air blower with same specifications further can be improved effectively, and efficiency of the fan is improved.
Description
Technical field
The utility model relates to a kind of blade for blower fan, specifically a kind of blade for blower fan.
Background technique
Blower is general main to be made up of six parts such as motor, air filter, blower body, air chamber, base (fuel tank of holding concurrently), oil dripping mouths.Blower is by the rotor eccentricity running of biasing in the cylinder, and makes the volume-variation between the blade in the rotor that air is sucked, compresses, spues.Be widely used in each industrial department such as metallurgy, chemical industry, chemical fertilizer, petrochemical industry, food, building materials, oil, mine, weaving, gas station, strength conveying, sewage treatment.In centrifugal blower, the compression process of air passes through normally that several running wheels (or what claims) carry out under action of centrifugal force.Blower has the rotor of a high speed rotating, epitrochanterian blade drives the air high-speed motion, and centrifugal force makes air in the casing of involute shape, flows to the blower fan outlet along involute, high speed airflow has certain blast, and new air enters additional by the center of casing.In recent years, each state was all at the internal structure external structure that improves blower, to obtain better energy-conservation and quiet effect.
Energy-conservation and the quietness technology that at present a lot of blowers adopt mainly is to use hydraulic couplers and frequency variator, for example suitable improvement has been done to the shape of flow passage component such as spiral case and impeller in the blower by Japan, prevented the generation of eddy current and flow separation effectively, its adiabatic efficiency improves 5%～10% than original centrifugal blower; The big flow centrifugal blower that Switzerland makes, every grade is equipped with the entry guide vane device, and its polytropic efficiency reaches 82%; After the multistage centrifugal blower that Japan makes, employing entry guide vane were regulated continuously automatically, fractional energy savings reached 20%; The high speed one-stage centrifugal formula blower of the U.S. adopts high rotating speed, high pressure ratio semi-open type radially behind the 3 d impeller, and its efficient can improve 10%; In addition, the other end at the blower main shaft that also has is provided with the tail gas turbine device, and both compliance with environmental protection requirements had reached energy-conservation purpose again.These The application of new technique improved the operational efficiency of blower fan, but price is higher, and installation and maintenance work are very complicated.In fact, the design of blade blower often improves energy conversion efficiency, reduces the key of noise level, also is to be easy to improved part most.For example, the noise that blower produces causes owing to the generation blade vortex often, when blower turns round, blade rotates at a high speed, at this moment because the generation of lift tends to produce a large amount of eddy current at the rear portion of blade, in addition, when at blade the situation of airflow breakaway being arranged, also can produce eddy current.The eddy current of these generations causes pressure to change, and this pressure changes can produce noise, and can cause energy conversion efficiency to reduce, and wastes energy.
The model utility content
In order to solve above-mentioned technical problem, the utility model provides a kind of and installs simply, effectively reduces the blade of blade vortex, energy conversion efficiency height, energy saving.
The utility model is achieved through the following technical solutions:
A kind of blade for blower fan, this blade comprises body and the columned shank that is connected, described body is hollow shape, wherein, end near the connection shank on the described body is blade root, end away from the connection shank is blade tip, fixedly connected between described connection shank and the blade root, make described body under the drive that connects shank, to rotate, be provided with the prominent muscle of a circle at described connection shank away from the end of blade root, wherein, the symmetry axis of columned connection shank extends to blade tip from blade root in body, and the length of the elongation line of wherein said symmetry axis between blade root and blade tip is called the span of blade, the thickness of described body is presented by the direction of blade root along blade span to blade tip earlier to be increased the mode that afterwards reduces and arranges, in addition, described body also comprises facing the wind portion and leeward portion, the described transition sleekly between portion and the leeward portion of facining the wind;
The cross section that in blade structure, has four positions, be respectively A-A, B-B, four cross sections of C-C and D-D, wherein, the A-A cross section is half position of blade span length, the B-B cross section is the position apart from blade root 1/3rd length of span, the C-C cross section is the position apart from blade root sixth length of span, the D-D cross section is the position apart from blade root 1/12nd length of span, wherein, in the cross section of each position of blade, the inwall of described body is all tangent with a basic circle, described basic circle be with body in the circle of the tangent diameter maximum of inner body wall, the straight line that the center of circle of the basic circle of each position is joined together to form is the axis of basic circle, described axis is on same the straight line with the described shank symmetry axis that is connected, in addition, at each place, sectional position of blade, the thickness of described blade all reduces to two ends from basic circle, in addition, the diameter of described basic circle increases afterwards earlier from blade root to the blade tip direction and reduces, in described blade, the torsion angle of described body, blade profile bent angle and inlet angle are from the blade root to the blade tip and be the variation of segmented along the direction of blade span, the torsion angle of described body is 25 ° at the section A-A place, described torsion angle all is set to 25 ° between A-A cross section and blade tip, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, wherein, described torsion angle is 22 ° at the section B-B place, described torsion angle is 10 ° at cross section C-C place, described torsion angle is 5 ° at cross section D-D place, described torsion angle is 0 ° at the blade root place, the geometry inlet angle of described body is 28 ° at the section A-A place, described how much inlet angles all are set to 28 ° between A-A cross section and blade tip, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described how much inlet angles are 14 ° at the section B-B place, described how much inlet angles are 4 ° at cross section C-C place, and described how much inlet angles are 2 ° at cross section D-D place; In addition, the blade profile bent angle of described body is 16 ° at the section A-A place, described blade profile bent angle angle all is set to 16 ° between A-A cross section and blade tip, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described blade profile bent angle is 10 ° at the section B-B place, described blade profile bent angle is 6 ° at cross section C-C place, and described blade profile bent angle is 4 ° at cross section D-D place.
Preferably, the torsion angle of described body is 50 ° at the section A-A place, described torsion angle all is set to 50 ° between A-A cross section and blade tip, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, wherein, described torsion angle is 42 ° at the section B-B place, and described torsion angle is 14 ° at cross section C-C place, and described torsion angle is 3 ° at cross section D-D place; The geometry inlet angle of described body is 33 ° at the section A-A place, described how much inlet angles all are set to 33 ° between A-A cross section and blade tip, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described how much inlet angles are 27 ° at the section B-B place, described how much inlet angles are 9 ° at cross section C-C place, and described how much inlet angles are 4 ° at cross section D-D place; In addition, the blade profile bent angle of described body is 21 ° at the section A-A place, described blade profile bent angle angle all is set to 21 ° between A-A cross section and blade tip, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described blade profile bent angle is 16 ° at the section B-B place, described blade profile bent angle is 9 ° at cross section C-C place, and described blade profile bent angle is 7 ° at cross section D-D place.
Preferably, described fixedly connected be the welding.
The beneficial effect that the utility model brings is: in the utility model, thickness to blade, portion and the profile of leeward portion and the torsion angle of blade body facing the wind, blade profile bent angle and how much inlet angles make improvements, can transform the aerodynamic condition of traditional blades like this, by can not only can reduce the generation of blade vortex to the improvement of blade structure, thereby reduce the blower overall noise, can also effectively promote the blower air quantity under the unidimensional specification, promote fan efficiency, make the novel fan fractional energy savings improve 10～20%, and cost is lower, but user's cost recovery within a short period of time.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 looks sectional view for the master of blade described in the utility model;
Fig. 2 is the three-dimensional structure diagram of blade described in the utility model;
Fig. 3 is the sectional view of A-A section among Fig. 1;
Fig. 4 is the sectional view of B-B section among Fig. 1;
Fig. 5 is the sectional view of C-C section among Fig. 1;
Fig. 6 is the sectional view of D-D section among Fig. 1.
The label of component names correspondence is as follows among the figure:
1, body; 2, connect shank; 3, blade root; 4, blade tip; 5, the portion of facining the wind; 6, leeward portion; 7, prominent muscle; 8, basic circle.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail:
Embodiment as blade described in the utility model, as shown in Figure 1, this blade comprises body 1 and the columned shank 2 that is connected, described body 1 is hollow shape, wherein, end near connection shank 2 on the described body 1 is blade root 3, end away from connection shank 2 is blade tip 4, fixedly connected between described connection shank 2 and the blade root 3, make described body 1 under the drive that connects shank 2, to rotate, described fixedly connected can be welding, be provided with the prominent muscle 7 of a circle at described connection shank 1 away from the end of blade root 3.Wherein, the symmetry axis of columned connection shank 2 extends to blade tip 4 from blade root 3 in body 1, the length of the elongation line of wherein said symmetry axis between blade root 3 and blade tip 4 is called the span of blade, and 4 direction presents and increases earlier the setting that afterwards reduces the thickness of described body 1 along blade span to blade tip by blade root 3.
With reference to Fig. 2, Fig. 2 shows the stereochemical structure of blade shown in Fig. 1, and wherein, described body 1 comprises down with the wind portion 5 and leeward 6, transition sleekly between described facing the wind portion 5 and leeward 6.In addition, the cross section profile of the end of the portion 5 of facining the wind and leeward 6 end is wavy, can reduce the generation of blade vortex so effectively.
With reference to Fig. 3-Fig. 6, Fig. 3-Fig. 6 schematically shows blade among Fig. 1 at the blade profile figure of A-A, B-B, C-C and four positions of D-D, wherein, the A-A cross section is half position of blade span, the B-B cross section is the position apart from blade root 1/3rd three span, the C-C cross section is the position apart from blade root 3 sixth spans, and the D-D cross section is the position apart from blade root 1/30th two span.Wherein, in the cross section of each position of blade, (be not limited to above-mentioned four positions), the inwall of described body 1 is all tangent with a basic circle 8, described basic circle 8 be with body 1 cross section in the circle of the tangent diameter maximum of inwall, the straight line that the center of circle of the basic circle 8 of each position is joined together to form is the axis of basic circle 8, described axis is on same the straight line with described shank 2 symmetry axis that are connected, in addition, at each place, sectional position of blade, the thickness of described blade all reduces to two ends from basic circle 8, in addition, the diameter of described basic circle 8 from blade root 3 to blade tip 4 directions successively decrease.
According to Fig. 3-Fig. 6, the torsion angle of described body 1, blade profile bent angle and inlet angle are from blade root 3 to blade tip 4 and be the variation of segmented along the direction of blade span, the torsion angle of described body 1 is 25 ° at the section A-A place, described torsion angle all is set to 25 ° between A-A cross section and blade tip 4, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, wherein, described torsion angle is 22 ° at the section B-B place, described torsion angle is 10 ° at cross section C-C place, described torsion angle is 5 ° at cross section D-D place, described torsion angle is 0 ° at place, blade root 3 ends, the geometry inlet angle of described body 1 is 28 ° at the section A-A place, described how much inlet angles all are set to 28 ° between A-A cross section and blade tip 4, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, described how much inlet angles are 14 ° at the section B-B place, and described how much inlet angles are 4 ° at cross section C-C place, and described how much inlet angles are 2 ° at cross section D-D place; In addition, the blade profile bent angle of described body 1 is 16 ° at the section A-A place, described blade profile bent angle angle all is set to 16 ° between A-A cross section and blade tip 4, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, described blade profile bent angle is 10 ° at the section B-B place, described blade profile bent angle is 6 ° at cross section C-C place, and described blade profile bent angle is 4 ° at cross section D-D place.
As the embodiment of blade described in the utility model, be with embodiment one difference:
The torsion angle of described body 1 is 50 ° at the section A-A place, described torsion angle all is set to 50 ° between A-A cross section and blade tip 4, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, wherein, described torsion angle is 42 ° at the section B-B place, described torsion angle is 14 ° at cross section C-C place, and described torsion angle is 3 ° at cross section D-D place; The geometry inlet angle of described body 1 is 33 ° at the section A-A place, described how much inlet angles all are set to 33 ° between A-A cross section and blade tip 4, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, described how much inlet angles are 27 ° at the section B-B place, described how much inlet angles are 9 ° at cross section C-C place, and described how much inlet angles are 4 ° at cross section D-D place; In addition, the blade profile bent angle of described body 1 is 21 ° at the section A-A place, described blade profile bent angle angle all is set to 21 ° between A-A cross section and blade tip 4, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root 3, described blade profile bent angle is 16 ° at the section B-B place, described blade profile bent angle is 9 ° at cross section C-C place, and described blade profile bent angle is 7 ° at cross section D-D place.
Above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technological scheme that mode that equivalence is replaced obtains, all drops on protection domain of the present utility model.
Claims (3)
1. blade that is used for blower fan, this blade comprises body and the columned shank that is connected, described body is hollow shape, wherein, end near the connection shank on the described body is blade root, end away from the connection shank is blade tip, fixedly connected between described connection shank and the blade root, make described body under the drive that connects shank, to rotate, be provided with the prominent muscle of a circle at described connection shank away from the end of blade root, wherein, the symmetry axis of columned connection shank extends to blade tip from blade root in body, and the length of the elongation line of wherein said symmetry axis between blade root and blade tip is called the span of blade, the thickness of described body is presented by the direction of blade root along blade span to blade tip earlier to be increased the mode that afterwards reduces and arranges, in addition, described body also comprises facing the wind portion and leeward portion, the described transition sleekly between portion and the leeward portion of facining the wind;
The cross section that in blade structure, has four positions, be respectively A-A, B-B, four cross sections of C-C and D-D, wherein, the A-A cross section is half position of blade span length, the B-B cross section is the position apart from blade root 1/3rd length of span, the C-C cross section is the position apart from blade root sixth length of span, the D-D cross section is the position apart from blade root 1/12nd length of span, wherein, be not limited in the cross section of each position of above-mentioned four positions at blade, the inwall of described body and a basic circle are tangent, described basic circle be with body in the circle of the tangent diameter maximum of inwall, the straight line that the center of circle of the basic circle of each position is joined together to form is the axis of basic circle, described axis is on same the straight line with the described shank symmetry axis that is connected, in addition, at each place, sectional position of blade, the thickness of described blade all reduces to two ends from basic circle, in addition, the diameter of described basic circle increases afterwards earlier from blade root to the blade tip direction and reduces, in described blade, the torsion angle of described body, blade profile bent angle and inlet angle are from the blade root to the blade tip and be the variation of segmented along the direction of blade span, the torsion angle of described body is 25 ° at the section A-A place, described torsion angle all is set to 25 ° between A-A cross section and blade tip, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, wherein, described torsion angle is 22 ° at the section B-B place, described torsion angle is 10 ° at cross section C-C place, described torsion angle is 5 ° at cross section D-D place, described torsion angle is 0 ° at the blade root end place, the geometry inlet angle of described body is 28 ° at the section A-A place, described how much inlet angles all are set to 28 ° between A-A cross section and blade tip, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described how much inlet angles are 14 ° at the section B-B place, described how much inlet angles are 4 ° at cross section C-C place, and described how much inlet angles are 2 ° at cross section D-D place; In addition, the blade profile bent angle of described body is 16 ° at the section A-A place, described blade profile bent angle angle all is set to 16 ° between A-A cross section and blade tip, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described blade profile bent angle is 10 ° at the section B-B place, described blade profile bent angle is 6 ° at cross section C-C place, and described blade profile bent angle is 4 ° at cross section D-D place.
2. blade as claimed in claim 1, it is characterized in that: the torsion angle of described body is 50 ° at the section A-A place, described torsion angle all is set to 50 ° between A-A cross section and blade tip, described torsion angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, wherein, described torsion angle is 42 ° at the section B-B place, and described torsion angle is 14 ° at cross section C-C place, and described torsion angle is 3 ° at cross section D-D place; The geometry inlet angle of described body is 33 ° at the section A-A place, described how much inlet angles all are set to 33 ° between A-A cross section and blade tip, described how much inlet angles present the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described how much inlet angles are 27 ° at the section B-B place, described how much inlet angles are 9 ° at cross section C-C place, and described how much inlet angles are 4 ° at cross section D-D place; In addition, the blade profile bent angle of described body is 21 ° at the section A-A place, described blade profile bent angle angle all is set to 21 ° between A-A cross section and blade tip, described blade profile bent angle presents the amplitude fast variation of successively decreasing in slow back earlier between A-A cross section and blade root, described blade profile bent angle is 16 ° at the section B-B place, described blade profile bent angle is 9 ° at cross section C-C place, and described blade profile bent angle is 7 ° at cross section D-D place.
3. blade as claimed in claim 1 or 2 is characterized in that: described fixedly connected be welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220735722 CN203175976U (en) | 2012-12-27 | 2012-12-27 | Blade used for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220735722 CN203175976U (en) | 2012-12-27 | 2012-12-27 | Blade used for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203175976U true CN203175976U (en) | 2013-09-04 |
Family
ID=49072679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220735722 Withdrawn - After Issue CN203175976U (en) | 2012-12-27 | 2012-12-27 | Blade used for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203175976U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032375A (en) * | 2012-12-27 | 2013-04-10 | 江苏中金环保科技有限公司 | Blade for draught fan |
-
2012
- 2012-12-27 CN CN 201220735722 patent/CN203175976U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032375A (en) * | 2012-12-27 | 2013-04-10 | 江苏中金环保科技有限公司 | Blade for draught fan |
| CN103032375B (en) * | 2012-12-27 | 2015-05-20 | 江苏中金环保科技有限公司 | Blade for draught fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |