CN207246110U - A kind of trapezoidal distortion fan blade - Google Patents
A kind of trapezoidal distortion fan blade Download PDFInfo
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- CN207246110U CN207246110U CN201721088705.9U CN201721088705U CN207246110U CN 207246110 U CN207246110 U CN 207246110U CN 201721088705 U CN201721088705 U CN 201721088705U CN 207246110 U CN207246110 U CN 207246110U
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Abstract
The utility model discloses a kind of trapezoidal distortion fan blade, including with the open front communicated, the outline border of after-opening, further include the interlocking bar being vertically arranged, the base shaft being vertically arranged is equipped with outline border, it is equipped with outline border and sets gradually multiple emulsion sheets from top to bottom, the multiple emulsion sheet is respectively with base shaft with the first axis connection, so that the multiple emulsion sheet naturally droops the open front for blocking outline border under the action of dead weight, the multiple emulsion sheet is respectively with interlocking bar with the second axis connection, second axis is arranged at intervals with first axle, so that the upper-lower position of interlocking bar can control emulsion sheet around the rotational angle of first axle, so as to control the keying of open front.Due to there is the setting of interlocking bar, so emulsion sheet can rotate at the same time, and rotational angle all same, so as to drop low wind noise.The utility model is used for fan box flange.
Description
Technical field
It the utility model is related to a kind of trapezoidal distortion fan blade.
Background technology
Axial flow blower, purposes is very extensive, is exactly and the equidirectional air-flow of the axis of fan blade, such as electric fan, outdoor machine of air-conditioner wind
Fan is exactly that axis stream mode runs wind turbine.Why it is known as " axial-flow type ", is because gas is flowed parallel to fan shaft.Axial-flow type wind
Machine is generally used for the occasion that traffic requirement is higher and pressure requirements are relatively low.Axial fan fixed position simultaneously moves air.Axis
Flow fan is mainly made of draught fan impeller and casing, simple in structure but data demand is very high.Existing list rondelle blade,
Total head is low, and fan efficiency is low.
Utility model content
The technical problems to be solved in the utility model is：Raising total head, high efficiency can be reached at the low rotational speed by providing one kind
Trapezoidal distortion fan blade.
The solution that the utility model solves its technical problem is：
A kind of trapezoidal distortion fan blade, including blade body, blade body are the uniform sheet body of wall, and blade body has positive pressure
Face and suction surface, are equipped with neutral surface between pressure surface and suction surface, the pressure surface or suction surface or neutral surface include sequentially connecting
Root side, front, top margin, the back connect；
Root side is drop shadow curve of the root arc on root cylindrical surface, and root arc radius is the circular arc of R, using the midpoint of root arc as foundation
The line of point, root arc upper extreme point and lower extreme point is root string, and the angle of root string and datum level is A, and datum level is vertical with root cylindrical surface；
Drop shadow curve of the top margin for top arc on tip circle cylinder, the circular arc that top arc radius is R, pushes up the midpoint of arc in datum level
On, the line that pushes up arc upper extreme point and lower extreme point is top chord, and the angle of top chord and datum level is B；
Average control line is equipped between root side and top margin；
Average control line is drop shadow curve of the mean arc on average cylindrical surface, the circular arc that average arc radius is R, mean arc
Midpoint on datum level, the line of mean arc upper extreme point and lower extreme point is mean chord, and the angle of mean chord and datum level is C；
The tactical diameter of tip circle cylinder is D, and the tactical diameter on root cylindrical surface is d, and the tactical diameter on average cylindrical surface is
The isosceles trapezoid sheet metal sizing that it is α by the angle of both sides waist edge that blade body, which is, forms, the isosceles trapezoid gold
The top short side of category piece, bottom long side are arc, and the top short side of the trapezoidal sheet metal is top margin, and the bottom of the trapezoidal sheet metal is grown
While for root while；The scope of α is 6 degree to 13 degree；Root cylindrical surface, tip circle cylinder, average cylindrical surface are coaxial.
Further as such scheme is improved, and the scope of A is 36 degree to 42 degree.
Further as such scheme is improved, and the scope of B is 18 degree to 25 degree.
Further as such scheme is improved, and the scope of C is 27 degree to 34 degree.
Further as such scheme is improved, R=20-40mm, R1=41-61mm, R2=62-92mm.
The beneficial effects of the utility model are：A kind of trapezoidal distortion fan blade, including blade body, blade body are uniform for wall
Sheet body, blade body has pressure surface and suction surface, and neutral surface, the pressure surface or negative are equipped between pressure surface and suction surface
Pressure surface or neutral surface include connected in sequence side, front, top margin, back；Root side is that projection of the root arc on root cylindrical surface is bent
Line, root arc radius is the circular arc of R, and using the midpoint of root arc as foundation point, the line of root arc upper extreme point and lower extreme point is root string, root string
Angle with datum level is A, and datum level is vertical with root cylindrical surface；Drop shadow curve of the top margin for top arc on tip circle cylinder, pushes up arc
Radius is the circular arc of R, pushes up the midpoint of arc on datum level, and the line for pushing up arc upper extreme point and lower extreme point is top chord, top chord and benchmark
The angle in face is B；Average control line is equipped between root side and top margin；Average control line is throwing of the mean arc on average cylindrical surface
Shadow curve, the circular arc that average arc radius is R, the midpoint of mean arc is on datum level, the line of mean arc upper extreme point and lower extreme point
For mean chord, the angle of mean chord and datum level is C；The tactical diameter of tip circle cylinder is D, and the tactical diameter on root cylindrical surface is d,
The tactical diameter on average cylindrical surface isThe isosceles trapezoid sheet metal that it is α by the angle of both sides waist edge that blade body, which is,
Sizing forms, and the top short side of the isosceles trapezoid sheet metal, bottom long side are arc, and the top short side of the trapezoidal sheet metal is top
Side, the bottom long side of the trapezoidal sheet metal is root side.In use, allowing root side and the columned a diameter of d of multiple blade bodies
Base wheel connection allow blade body annular array in base wheel so as to forming impeller.Since root side is a diameter of in itself by root arc
Project and form on the root cylindrical surface of d, so base wheel very can snugly link together with blade, the scope of α is 6 degree to 13
Degree；Root cylindrical surface, tip circle cylinder, average cylindrical surface are coaxial.Such impeller can improve total head under the low speed, and efficient.This
Utility model is used for axial flow blower.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is the part of the embodiment of the utility model, rather than entirely
Portion's embodiment, those skilled in the art without creative efforts, can also obtain it according to these attached drawings
His designing scheme and attached drawing.
Fig. 1 is the opening-closing structure schematic diagram of the utility model embodiment；
Fig. 2 is the dimensional structure diagram of the utility model embodiment；
Fig. 3 is the projection structure schematic diagram of the utility model embodiment.
Embodiment
Carried out below with reference to the technique effect of the design of embodiment and attached drawing to the utility model, concrete structure and generation
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is the part of the embodiment of the utility model, rather than whole embodiments, the embodiment based on the utility model, the skill of this area
The other embodiment that art personnel are obtained without creative efforts, belongs to the model of the utility model protection
Enclose.In addition, all connection/connection relations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more preferably draw bail.Each technology in the utility model is special
Sign, can be with combination of interactions on the premise of not conflicting conflict.
Referring to figs. 1 to Fig. 3, this is the embodiment of the utility model, specifically：
A kind of trapezoidal distortion fan blade, including blade body, blade body are the uniform sheet body of wall, and blade body has positive pressure
Face and suction surface, are equipped with neutral surface between pressure surface and suction surface, the pressure surface or suction surface or neutral surface include sequentially connecting
Root side 101, front 102, top margin 103, the back 104 connect；Root side 101 is that projection of the root arc 1011 on root cylindrical surface 1015 is bent
Line, 1011 radius of root arc is the circular arc of R, using the midpoint of root arc 1011 as foundation point 1012,1011 upper extreme point of root arc and lower extreme point
Line be root string 1014, root string 1014 and the angle of datum level 1013 are A, and datum level 1013 is vertical with root cylindrical surface 1015；
Drop shadow curve of the top margin 103 for top arc 1031 on tip circle cylinder 1033, the circular arc that top 1031 radius of arc is R2, top arc 1031
On datum level 1013, the line for pushing up 1031 upper extreme point of arc and lower extreme point is top chord 1032, top chord 1032 and datum level at midpoint
1013 angle is B；Average control line is equipped between root side 101 and top margin 103；Average control line is mean arc 1001 average
Drop shadow curve on cylindrical surface 1002,1001 radius of mean arc are the circular arc of R1, and the midpoint of mean arc 1001 is in datum level 1013
On, the line of 1001 upper extreme point of mean arc and lower extreme point is mean chord 1003, and mean chord 1003 and the angle of datum level 1013 are
C；The tactical diameter of tip circle cylinder 1033 is D, and the tactical diameter on root cylindrical surface 1015 is d, and the revolution on average cylindrical surface 1002 is straight
Footpath isThe isosceles trapezoid sheet metal sizing that it is α by the angle of both sides waist edge that blade body, which is, forms, the isosceles
The top short side of trapezoidal sheet metal, bottom long side are arc, and the top short side of the trapezoidal sheet metal is top margin 103, the trapezoidal gold
The bottom long side for belonging to piece is root side 101.In use, the root side of multiple blade bodies is allowed to be connected with the base wheel of columned a diameter of d
Blade body annular array is allowed in base wheel so as to form impeller.Due to root side be in itself by root arc a diameter of d root cylinder
Projection forms on face, so base wheel very can snugly link together with blade.Root cylindrical surface 1015, tip circle cylinder
1033rd, average cylindrical surface 1002 is coaxial.In use, Gen Bian is connected with impeller pedestal, also will root side paraxial side is set, and push up
While being located at distal shaft side, front or back are windward side, and windward side is used to cut air generation air pressure.Such impeller can be in low speed
Lower raising total head, and it is efficient.The present embodiment is by the shaft of impeller and root cylindrical surface 1015, tip circle cylinder 1033, average cylinder
Face 1002 is coaxial.
The scope of A is 36 degree to 42 degree, and the present embodiment chooses 39 degree.
The scope of B is 18 degree to 25 degree, and the present embodiment chooses 21.5 degree.
The scope of C is 27 degree to 34 degree, and the present embodiment chooses 30.5 degree.
The R of the present embodiment chooses 29.8mm, and R1 chooses 50.6mm, and R2 chooses 76.8mm.
The scope of α is 6 degree to 13 degree, and the present embodiment chooses 9.9 degree.
Since same Fans can all show different performances under different operating modes, exist to existing single rondelle impeller
DATA REASONING is carried out under different operating modes, measured data is as shown in table 1：
Table 1：
Similarly, the impeller of the present embodiment is measured under same operating mode, measured data is as shown in table 2：
Table 2：
The power of impeller, total head can be greatly improved using the fan blade of the utility model as seen from the table.
The utility model is different half by different arcs due to root side 101, front 102, top margin 103, back 104
Determined by projection on the cylindrical surface in footpath, but the simple fan blade shape that can not be realized by such control to the utility model
State determines, and these forms can not reach the effect of the present embodiment.By substantial amounts of experiment, with reference to the difficulty or ease journey of production
Degree, it is determined that use blade body to be formed for the isosceles trapezoid sheet metal sizing for being α by the angle of both sides waist edge, the isosceles ladder
The top short side of shape sheet metal, bottom long side are arc, and the top short side of the trapezoidal sheet metal is top margin 103, the trapezoidal metal
The bottom long side of piece is root side 101, and the scope of α is 6 degree to 13 degree；Meet that projection relation meets α at the same time, could realize that this practicality is new
The effect of type.Projection relation is known as molding condition 1, and α is known as molding condition 2, the intersection shape of molding condition 1 and molding condition 2
An only corresponding molding condition 1 is possible into the leaf of series of discrete, that is, for the α of a definite numerical value.
The better embodiment of the utility model is illustrated above, but the utility model be not limited to it is described
Embodiment, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (6)
1. a kind of trapezoidal distortion fan blade, including blade body, it is characterised in that：Blade body is the uniform sheet body of wall, blade sheet
Body has pressure surface and suction surface, and neutral surface, the pressure surface or suction surface or neutral surface are equipped between pressure surface and suction surface
Including connected in sequence side (101), front (102), top margin (103), back (104)；
Root side (101) is drop shadow curve of the root arc (1011) on root cylindrical surface (1015), and root arc (1011) radius is the circle of R
Arc, using the midpoint of root arc (1011) as foundation point (1012), the line of root arc (1011) upper extreme point and lower extreme point is root string
(1014), root string (1014) and the angle of datum level (1013) are A, and datum level (1013) is vertical with root cylindrical surface (1015)；
Drop shadow curve of the top margin (103) for top arc (1031) on tip circle cylinder (1033), the circle that top arc (1031) radius is R2
Arc, on datum level (1013), the line for pushing up arc (1031) upper extreme point and lower extreme point is top chord at the midpoint of top arc (1031)
(1032), top chord (1032) and the angle of datum level (1013) are B；
Average control line is equipped between root side (101) and top margin (103)；
Average control line is drop shadow curve of the mean arc (1001) on average cylindrical surface (1002), and mean arc (1001) radius is
The circular arc of R1, the midpoint of mean arc (1001) is on datum level (1013), the line of mean arc (1001) upper extreme point and lower extreme point
For mean chord (1003), mean chord (1003) and the angle of datum level (1013) are C；
The tactical diameter of tip circle cylinder (1033) is D, and the tactical diameter of root cylindrical surface (1015) is d, average cylindrical surface (1002)
Tactical diameter be
The isosceles trapezoid sheet metal sizing that it is α by the angle of both sides waist edge that blade body, which is, forms, the isosceles trapezoid sheet metal
Top short side, bottom long side be arc, the top short side of the trapezoidal sheet metal is top margin (103), the bottom of the trapezoidal sheet metal
Long side is root side (101), and the bottom long side width of the trapezoidal sheet metal is B；The scope of α is 6 degree to 13 degree；Root cylindrical surface
(1015), tip circle cylinder (1033), average cylindrical surface (1002) are coaxial.
A kind of 2. trapezoidal distortion fan blade according to claim 1, it is characterised in that：The scope of A is 36 degree to 42 degree.
A kind of 3. trapezoidal distortion fan blade according to claim 1, it is characterised in that：The scope of B is 18 degree to 25 degree.
A kind of 4. trapezoidal distortion fan blade according to claim 1, it is characterised in that：The scope of C is 27 degree to 34 degree.
A kind of 5. trapezoidal distortion fan blade according to claim 1, it is characterised in that：R=20-40mm, R1=41-61mm,
R2=62-92mm.
A kind of 6. trapezoidal distortion fan blade according to claim 1, it is characterised in that：B is 14mm to 34mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721088705.9U CN207246110U (en) | 2017-08-25 | 2017-08-25 | A kind of trapezoidal distortion fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721088705.9U CN207246110U (en) | 2017-08-25 | 2017-08-25 | A kind of trapezoidal distortion fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207246110U true CN207246110U (en) | 2018-04-17 |
Family
ID=61883518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721088705.9U Withdrawn - After Issue CN207246110U (en) | 2017-08-25 | 2017-08-25 | A kind of trapezoidal distortion fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207246110U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477022A (en) * | 2017-08-25 | 2017-12-15 | 佛山市南海九洲普惠风机有限公司 | A kind of trapezoidal distortion fan blade |
-
2017
- 2017-08-25 CN CN201721088705.9U patent/CN207246110U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477022A (en) * | 2017-08-25 | 2017-12-15 | 佛山市南海九洲普惠风机有限公司 | A kind of trapezoidal distortion fan blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20230630 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180417 Effective date of abandoning: 20230630 |