CN106939902A - The energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall and the centrifugal fan using the impeller - Google Patents
The energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall and the centrifugal fan using the impeller Download PDFInfo
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- CN106939902A CN106939902A CN201710221642.8A CN201710221642A CN106939902A CN 106939902 A CN106939902 A CN 106939902A CN 201710221642 A CN201710221642 A CN 201710221642A CN 106939902 A CN106939902 A CN 106939902A
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- 239000000463 material Substances 0.000 description 6
- 238000005206 flow analysis Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
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Classifications
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- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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Abstract
A kind of forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall, including shroud, blade, hub disk and reel, shroud and hub disk are straight wall construction, and blade is variable curvature curve element ternary twisted blade, i.e.,：The forward and backward disk of draught fan impeller still uses conventional fan straight wall structure, and former binary blade is replaced by variable curvature curve element ternary blade, by adjusting curvature of the blade in the high direction of impeller inlet leaf, the BLADE FORCE appropriate balance air-flow that blade applies to air-flow when the impeller is rotated enable by axially switching to centrifugal intertia force during radial direction, so as to weaken the acute variation of air-flow speed at import；The centrifugal fan using the 3 d impeller is also claimed in the present invention；The present invention eliminates the adverse effect of minor radius turn inertia force by variable curvature curve element 3 d impeller BLADE FORCE, using the forward and backward disk traditional structure of straight wall, the forward and backward disk variable curvature curve element 3 d impeller of straight wall is designed, the energy-saving effect of above-mentioned fan impeller is realized.
Description
Technical field
The invention belongs to footpath, mixed flow turbine field of mechanical technique, it is related to centrifugal fan, air blower and compressor etc.
Equipment, more particularly to a kind of forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall and centrifugal using the impeller
Blower fan (ventilation blower, air blower, compressor).
Background technology
Since China Wu Zhonghua professor's last century the fifties have delivered " axle stream, runoff and mixed flow turbine machine in the U.S.
After tool subsonic speed, supersonic speed Three -dimension flow universal theory ", as computer technology is developed rapidly, in high-end resource equipment field
Three -dimension flow turbomachinery obtains extensive use.At present both at home and abroad in footpath, the widely used U.S. NREC in mixing turbomachinery field
Vertical element 3 d impeller, mainly include shroud 1, blade 2, hub disk 3, spiral case 4, aspiration channel 5 etc., blade 2 is vertical element
Ternary blade.So-called vertical element 3 d impeller, the composition for refering in particular to the ternary twisted blade median plane of impeller is by following rule
Formed：Fabrication drawing only provides the x, y, z coordinate of blade tip and the space curve of root two, by this two radical spaces curve
One group of space line is obtained etc. parameter corresponding points, the space curved surface that this group of space line is formed is vertical element ternary leaf
The blade center face of wheel, U.S. NREC is called " any space line element 3 d impeller ".Obvious this group of space line
Direction with impeller Meridian Passage dual side-edge circle --- forward and backward tortuous line is substantially vertical (because forward and backward disk is unlikely to be concentric circles
Arc, in the absence of common normal, it is impossible to strictly vertical with forward and backward disk), Just because of this, when the impeller is rotated, in impeller inlet area
The BLADE FORCE that domain blade 2 is produced to air-flow is also substantially vertical by axially switching to normal inertial force produced during radial direction with air-flow
(Fig. 2), the reason for inertia force exactly produces blade height side's upward velocity acute variation.To overcome impeller eye air-flow by axle
Cause the adverse effect of speed acute variation to normal inertial force when switching to radial direction, big turning radius meridian must be used
(Meridional) runner, impeller front disc (Shroud) 1, hub disk (Hub) 3 must be bending (Fig. 1), this vertical element three
The energy consumption of first more conventional two-dimensional impeller of impeller have dropped 5~10 percentage points.
Above-mentioned vertical element 3 d impeller must use the meridional channel of big turning radius, and the forward and backward disk of bending is carried significantly
High manufacturing cost.For big-and-middle-sized, middle low speed blower fan field, such as sintering, dedusting, boiler induced draft are examined for cost
Consider, the forward and backward disk of its casing, impeller is metal plate material structure, be still accustomed to the traditional structure (Fig. 3) using the forward and backward disk of straight wall, including it is preceding
Disk 1, blade 2, hub disk 3, reel 4 etc., blade 2 are binary blade.This forward and backward dish structure of straight wall greatly limit vertical element
3 d impeller can only be bent in the application in low side blower fan field using traditional blades flows direction, short transverse do not turn round two
First blade (Fig. 4).Because this kind of low side blower fan has a large capacity and a wide range, national substantial amounts of energy waste is caused.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of energy-saving forward and backward disk of straight wall
Variable curvature curve element 3 d impeller and the centrifugal fan using the impeller, weaken the play of air-flow speed at import significantly
Strong change, realizes the energy-saving effect of 3 d impeller；Overcoming U.S. NREC vertical elements 3 d impeller simultaneously must have
The turning radius of sufficiently large Meridian Passage, can just design the restrictive condition of 3 d impeller.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall, including shroud, blade, hub disk and reel,
The shroud and hub disk are straight wall construction, and the blade is variable curvature curve element ternary twisted blade.I.e.：Draught fan impeller
Forward and backward disk still uses conventional fan straight wall structure, and former binary blade is replaced by variable curvature curve element ternary blade.
The variable curvature curve element ternary twisted blade is blade in height and flows to direction and be respectively provided with distortion, and leaf
Curvature of the piece in the high direction of impeller inlet leaf is different from the curvature of remaining position.
By adjusting curvature of the blade in the high direction of impeller inlet leaf so that blade applies to air-flow when the impeller is rotated
BLADE FORCE FbCan appropriate balance air-flow by axially switching to centrifugal intertia force F during radial directioni, so as to weaken air-flow speed at import
Acute variation.
The method for designing of the blade is as follows：
Given blade tip, the desired VELOCITY DISTRIBUTION along meridional stream line m in rootThat is impeller interior air-flow phase
To speedIt is that blade angle β meets relationship below with air current flow angle：
Wherein, WθTangential-velocity component is represented, W represents air-flow relative velocity, then β value is：
And because：
Wherein, r is radius of the curved blade to gyroaxis, then blade angle coordinate value θ is learnt by following integral formula：
Leaf top, blade root spatial streamline s are that meridional stream line m is forward and backward dish-type line m=f (r, z) in the projection of meridian plane,
So as to obtain leaf top spatial streamline θsAnd blade root θhSpatial streamline formula it is as follows：
θs=f (rs,zs)
θh=f (rh,zh)
Using leaf top and blade root spatial streamline two as the variable curvature curve element of spatial warping blade of parameter point such as respectively
End points, and each curve element curvature is provided along the desired Distribution Values of quasi-orthogonal q, so as to obtain whole space curved surface.
According to resulting spoon of blade, using flow analysis on across the disk cover relative stream surfaces of centrifugal or mix-flow compressor
Method, carries out the Three -dimension flow design of the forward and backward disk variable curvature curve element centrifugal fan of straight wall.
The centrifugation using the energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall is also claimed in the present invention
Formula blower fan.
Compared with prior art, the present invention has the beneficial effect that：
1) acute variation of air-flow speed at import is weakened significantly, realizes the energy-saving effect of 3 d impeller.
The curve element ternary blade of variable curvature, the BLADE FORCE F that blade applies to air-flow when the impeller is rotatedbCan be with appropriate balance air-flow
By axially switching to centrifugal intertia force F during radial directioni(as shown in Figure 7 and Figure 8), weaken significantly air-flow at import speed it is violent
Change, realizes the energy-saving effect of 3 d impeller.
2) sufficiently large Meridian Passage turning radius, Cai Nengshe must be had by overcoming U.S. NREC vertical elements 3 d impeller
Count out the restrictive condition of 3 d impeller.If it is envisioned that not abandoning the design bar that 3 d impeller blade profile must be ruled surface
Part, is difficult to reach effect of the present invention.
3) avoid can only by impeller front disc (Shroud), hub disk (Hub) turning radius are increased sufficiently to degree when,
The limitation of vertical element 3 d impeller could be used, it is only necessary to pass through variable curvature curve element ternary twisted blade so that in straight wall
Under the structural condition of traditional binary centrifugal blower of (un-flexed) forward and backward disk, it is possibly realized using energy-efficient 3 d impeller.
Using the forward and backward disk variable curvature curve element 3 d impeller centrifugal fan of above-mentioned straight wall, centrifugal ternary is realized
Impeller energy conservation and consumption reduction effects, it is expected to which energy consumption reduces 5~10 percentage points compared with conventional centrifugal ventilation blower, air blower, cost compared with
Curved wall vertical element 3 d impeller reduction by more than 50%.
Brief description of the drawings
Fig. 1 is vertical element 3 d impeller structural representation (all direction view, namely meridian plane view) in the prior art.
Fig. 2 is vertical element 3 d impeller structural representation (axial view, namely surface of revolution view) in the prior art.
Fig. 3 be in conventional art the forward and backward disk two-dimensional impeller structural representation of straight wall (all direction views, namely meridian plane are regarded
Figure).
Fig. 4 be in conventional art the forward and backward disk two-dimensional impeller structural representation of straight wall (axial view, namely the surface of revolution are regarded
Figure).
Fig. 5 be the forward and backward disk variable curvature curve element 3 d impeller structural representation of straight wall of the present invention (all direction views, namely
Meridian plane view).
Fig. 6 be the forward and backward disk variable curvature curve element 3 d impeller structural representation of straight wall of the present invention (axial view, namely
Surface of revolution view).
Fig. 7 is the forward and backward disk variable curvature curve element 3 d impeller impeller inlet regional gas stream stress signal of straight wall of the present invention
Scheme (meridian plane).
Fig. 8 is the forward and backward disk variable curvature curve element 3 d impeller impeller inlet regional gas stream stress signal of straight wall of the present invention
Scheme (surface of revolution).Fb --- BLADE FORCE；Fi --- normal inertial force；W --- air-flow relative velocity；ω --- impeller anglec of rotation speed
Degree.
Fig. 9 is blade aerodynamic part design diagram.
Figure 10 is single suction metal plate material casing and rotor structure schematic diagram.
Figure 11 is double suction metal plate material casing and rotor structure schematic diagram.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of energy-saving forward and backward disk variable curvature curve element 3 d impeller centrifugal fan of straight wall, straight
Under the structure restrictive condition of the forward and backward disk traditional low-side blower fan of wall, using the long-term autonomous research and development of the present inventor " footpath, mixed-flow are saturating
The flat positive proposition Pneumatic design method of machinery ", has abandoned the restrictive condition of U.S. NREC 3 d impeller vertical element blades, has designed
Variable curvature curve element 3 d impeller (as shown in Figure 5 and Figure 6), including shroud 1, blade 2, hub disk 3, reel 4 etc., its middle period
Piece 2 is variable curvature curve element ternary blade.
Variable curvature curve element ternary twisted blade of the present invention is blade in height and flows to direction and be respectively provided with distortion, and
Curvature of the blade in the high direction of impeller inlet leaf is different from the curvature of remaining position.By adjusting blade in impeller inlet leaf Gao Fang
To curvature so that the BLADE FORCE F that blade applies to air-flow when the impeller is rotatedbCan appropriate balance air-flow by axially switching to footpath
To when centrifugal intertia force Fi, so as to weaken the acute variation of air-flow speed at import.The specific design method of blade is as follows：
1st, blade tip, the desired VELOCITY DISTRIBUTION along meridional stream line m in root are givenAs shown in figure 9, leaf
Take turns interior air-flow relative velocityIt is that blade angle β meets relationship below with air current flow angle：
In Fig. 9, WθTangential-velocity component is represented, W represents air-flow relative velocity, WrRepresent radius r directions component velocity, WmFor phase
To projections of the speed W on meridian plane, ω is impeller angular velocity of rotation；
So distributions of the blade angle β along spatial streamline s can be learnt, i.e. β value is：
And because：
Wherein, r is curved blade to gyroaxis radius；
So as to which blade angle coordinate value θ can be obtained by following integral formula：
Leaf top, blade root spatial streamline s are in meridional projection --- and meridional stream line m is forward and backward dish-type line m=f (r, z),
Finally learn：The spatial streamline of leaf top and blade root is respectively：
θs=f (rs,zs)
θh=f (rh,zh)
2nd, so that leaf top and blade root spatial streamline be each etc., parameter point is used as the two of the variable curvature curve element of spatial warping blade
Individual end points, and each curve element curvature is provided along the desired Distribution Values of quasi-orthogonal qSo as to learn whole space
Curved surface θ=f (m, q).
3rd, have after the coordinate value of spoon of blade, using Katsanis, T is by putting down that the magnificent Theories of Three-dimensional Flowing of Wu Zhong are developed into
Across disk cover S2mStream interface analyzes (bibliography：[" any quasi-orthogonal method is calculating turbomachinery meridional flow by Katsanis, T
Application in dynamic analysis " TN D2546, NASA, Cleveland, Ohio, 1964]), so that it may solve the vane type line of 3 d impeller
With the problem analysis of pneumatic design.The present invention is used by Katsanis, " the centrifugal or mixed-flow pressure that T is further developed into
Flow analysis (positive proposition) on across the disk cover relative stream surfaces of contracting machine " (bibliography：Turbocompressor specialty, speciality of computing mathematics,
" flow analysis (positive proposition) on across the disk cover relative stream surfaces of centrifugal or mix-flow compressor ",《XI AN JIAOTONG UNIVERSITY Subject Index》3rd
Phase, 1976) carry out the Three -dimension flow analysis of the forward and backward disk variable curvature curve element centrifugal fan of straight wall and design.
In the present invention, less small turning radius can be realized by the static guide duct before impeller.
With reference to Figure 10 and Figure 11, the present invention implements to include：
A kind of forward and backward disk variable curvature curve element 3 d impeller centrifugal fan of energy-efficient straight wall, original low-medium speed,
In the traditional single suction of mesolow centrifugal fan (Figure 10) and double suction (Figure 11) metal plate material casing, continue to use spindle set reel add before,
Straight disk binary (circular arc) blade welds the traditional structure of vane rotor afterwards, it is only necessary to which binary curved blade is changed into variable curvature curved element
Plain ternary blade, so as to solve traditional low-side blower fan structure and with the conditions of material, two-dimensional impeller wastes mass energy, unfavorable section
Can be environmentally friendly the problem of.Now, except variable curvature curve element ternary blade must use the design and system different from traditional low-side blower fan
Make outside technique, remaining all inlet plenum, casing, other component structurals of rotor, remained unchanged with material and manufacturing process.Become
The Profile Design of curvature curve element ternary blade is pressed to be implemented in the embodiment above on 1,2 parts in Pneumatic design method,
3 d impeller analysis of flow field is carried out by the method for its third portion.After mounted blade and heat pressing and molding mold are by computer programming,
After the completion of numerical control cutting machine and three coordinate numerical control mills, it is forward and backward that hot-forming twisted blade is welded into straight wall with the forward and backward disk of straight wall
Disk variable curvature curve element ternary blade impeller.Blower fan remainder process and conventional centrifugal binary blower fan are entirely same.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall, including shroud, blade, hub disk and reel, institute
State shroud and hub disk is straight wall construction, it is characterised in that the blade is variable curvature curve element ternary twisted blade.
2. the forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall according to claim 1, it is characterised in that institute
Stating variable curvature curve element ternary twisted blade is blade in height and flows to direction and be respectively provided with distortion, and blade enters in impeller
The curvature in the high direction of mouth leaf is different from the curvature of remaining position.
3. the forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall according to claim 1 or claim 2, it is characterised in that
Curvature of the blade in the high direction of impeller inlet leaf so that the BLADE FORCE F that blade applies to air-flow when the impeller is rotatedbCan be appropriate
Airflow balancing is by axially switching to centrifugal intertia force F during radial directioni, so as to weaken the acute variation of air-flow speed at import.
4. the forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall according to claim 1, it is characterised in that institute
The method for designing for stating blade is as follows：
Given blade tip, the desired VELOCITY DISTRIBUTION along meridional stream line m in rootThat is impeller interior air-flow is relatively fast
Degree It is that blade angle β meets relationship below with air current flow angle：
Wherein, WθTangential-velocity component is represented, W represents air-flow relative velocity, then β value is：
And because：
Wherein, r is radius of the curved blade to gyroaxis, then blade angle coordinate value θ is learnt by following integral formula：
Leaf top, blade root spatial streamline s are that meridional stream line m is forward and backward dish-type line m=f (r, z) in the projection of meridian plane, so that
Obtain leaf top spatial streamline θsAnd blade root θhSpatial streamline formula it is as follows：
θs=f (rs,zs)
θh=f (rh,zh)
Using leaf top and blade root spatial streamline respectively etc. parameter point as the variable curvature curve element of spatial warping blade two end points,
And each curve element curvature is provided along the desired Distribution Values of quasi-orthogonal q, so as to obtain whole space curved surface.
5. the forward and backward disk variable curvature curve element 3 d impeller of energy-saving straight wall according to claim 4, it is characterised in that root
According to resulting spoon of blade, using analysis method is flowed on across the disk cover relative stream surfaces of centrifugal or mix-flow compressor, carry out
The Three -dimension flow design of the forward and backward disk variable curvature curve element centrifugal fan of straight wall.
6. using the centrifugal fan of the energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall described in claim 1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107559235A (en) * | 2017-09-07 | 2018-01-09 | 佛山市南海九洲普惠风机有限公司 | A kind of fan blade and impeller of ternary distortion blower fan |
| CN107642491A (en) * | 2017-11-02 | 2018-01-30 | 洛阳北玻台信风机技术有限责任公司 | Motor-car, the cooling of high ferro tractive transformer fluidize centrifugal blower with ternary |
| CN107989823A (en) * | 2017-12-26 | 2018-05-04 | 北京伯肯节能科技股份有限公司 | Impeller, centrifugal compressor and fuel cell system |
| CN108547793A (en) * | 2017-11-10 | 2018-09-18 | 佛山市南海九洲普惠风机有限公司 | A kind of axial wheel |
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| CN107559235A (en) * | 2017-09-07 | 2018-01-09 | 佛山市南海九洲普惠风机有限公司 | A kind of fan blade and impeller of ternary distortion blower fan |
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| CN107989823A (en) * | 2017-12-26 | 2018-05-04 | 北京伯肯节能科技股份有限公司 | Impeller, centrifugal compressor and fuel cell system |
| CN107989823B (en) * | 2017-12-26 | 2023-12-01 | 北京伯肯节能科技股份有限公司 | Impeller, centrifugal compressor, and fuel cell system |
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|---|---|
| CN106939902B (en) | 2022-07-22 |
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Effective date of registration: 20210816 Address after: 15a-318, Maike center, No. 12, Jinye Road, Zhangba street, high tech Zone, Xi'an, Shaanxi 710076 Applicant after: Xi'an Shangjin Siyuan Turbine Technology Research Institute Co.,Ltd. Address before: 710049 Xi'an Jiao Tong University, 28 West Xianning Road, Shaanxi, Xi'an Applicant before: Wang Shangjin |
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Effective date of registration: 20220909 Address after: 261500 Haomai Industrial Park, 5655 Kangcheng street, Gaomi Economic Development Zone, Weifang City, Shandong Province Patentee after: HIMILE MECHANICAL MANUFACTURING Co.,Ltd. Address before: 15a-318, Maike center, No. 12, Jinye Road, Zhangba street, high tech Zone, Xi'an, Shaanxi 710076 Patentee before: Xi'an Shangjin Siyuan Turbine Technology Research Institute Co.,Ltd. |
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Denomination of invention: Energy saving straight wall front and rear disc variable curvature curve element three-dimensional impeller and centrifugal fan using this impeller Granted publication date: 20220722 Pledgee: China Construction Bank Corporation Gaomi sub branch Pledgor: HIMILE MECHANICAL MANUFACTURING Co.,Ltd. Registration number: Y2024980023256 |