CN110147608A - Heat dissipation synchronous pulley design method based on fan blade - Google Patents
Heat dissipation synchronous pulley design method based on fan blade Download PDFInfo
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Abstract
The heat dissipation synchronous pulley design method based on fan blade that the invention discloses a kind of, belongs to machine driven system design field.Synchronous pulley is designed the present invention is based on the heat dissipation synchronous pulley design method of fan blade and is combined with fan blade design, the System design method suitable for the synchronous pulley that radiates under various operating conditions is proposed.Own rotation band movable vane piece rotates when synchronous pulley based on fan blade can utilize work, generates the air-flow for being directed across belt wheel, enhances the heat convection of belt wheel, reduces belt wheel and belt friction heats up, improve the service life of belt wheel and belt.
Description
Technical field
The heat dissipation synchronous pulley design method based on fan blade that the present invention relates to a kind of belongs to machine driven system design
Field.
Background technique
In machine driving, synchronous pulley has accurate transmission ratio, and no slippage, constant velocity-ratio, stable drive, noise is small,
The advantages that transmission efficiency is high is widely used in automobile, weaves, printing, chemical industry, metallurgy, instrument and meter, petroleum, the machines such as lathe
In the transmission device of tool equipment.Synchronous pulley is while realizing efficient driving with the tooth engagement of belt, between belt wheel and belt
Friction can generate amount of heat, increase the temperature of belt wheel and belt.High temperature declines the service life of belt, also will
Security risk is caused to the operation of transmission system.Different from gear train assembly, belt wheel transmission is difficult with coolant to transmission
System radiating, therefore, the thermal solution design to synchronous belt pulley transmission system are a challenge always.Currently, existing synchronization
Belt wheel heat sink conception is including radiating to belt wheel using external wind regime, but constraint of the program by whole mechanical system, Er Qie
In large-scale transmission system, the distribution of belt wheel is complex, ineffective by the way of the heat dissipation of external wind regime, and fan installation is difficult
It spends larger.Another heat sink conception is the structure design for improving synchronous pulley, realizes heat dissipation using the design feature of itself.At present
Existing synchronous pulley radiator structure is included in belt wheel flank of tooth equipotential and sets fluting, opens heat release hole etc., and this structure type can be certain
Improve the heat dispersal situations of synchronous pulley in degree, but in general, the mode of fluting or aperture belongs to one kind and passively radiates
The position of form, and the constraint by Structural strength calls, fluting or aperture, quantity is limited, corresponding heat dissipation effect
It is limited.Therefore, it by being further improved the structure of synchronous pulley, is designed under the premise of meeting and being driven basic task a kind of efficient
Active cool type synchronous pulley, there is important value to synchronous belt pulley transmission system lifetim and reliability is improved.
Summary of the invention
Technical problem to be solved by the present invention lies in prior art defect is overcome, a kind of dissipating based on fan blade is provided
Hotsync belt wheel design method.
The operation principle of the present invention is that: on the basis of not changing conventional synchronous belt wheel function and basic structure, design one
The support construction of kind multi-fan blade shape, for connecting center mounting ring and gear outer ring, in synchronous pulley work, belt wheel
Multi-fan blade synchronization rotation above does work to air-flow using fan blade, makes the air near synchronous pulley with certain
Speed continuously passes through belt wheel flowing, enhances the heat convection of belt wheel, the final radiating and cooling for realizing belt wheel and belt.
In order to solve the above-mentioned technical problems, the present invention provides the design sides of the heat dissipation synchronous pulley based on fan blade
Method, specifically includes the following steps:
(1) model parameter: pitch is selected according to GB/T 11361-2008 to synchronous pulley type selecting according to transmission demand,
Width at tooth space root, gullet depth, tooth slot radius, tooth fillet radius, radius at tooth tip, twice of pitch line differential determine that belt wheel is specified
Revolving speed.
(2) according to transmission and installation requirements, design synchronous pulley basic parameter: the number of teeth, the facewidth, pitch diameter, gear half are passed through, if
Count synchronous belt wheel structure parameter: meridian chord length, blade tip outer radius, blade tip inside radius, blade root outer radius, blade root inside radius, Ye Zhong
Radius.
(3) according to cooling requirement, the air mass flow by synchronous pulley is estimated.
(4) it is calculated separately according to air mass flow, belt wheel rated speed, blade tip inside radius, blade root outer radius and meridian chord length
Fan blade root, in, three radial locations of point into relative wind angle being exported, according to three be calculated into outlet is opposite
Air-flow angle designs camber line in the blade arc formula of three radial locations.
(5) by blade root, in, camber line presses the equal thickness regularity of distribution from import to outlet in the blade of sharp three radial locations
Generate blade profile thickness, and by its respectively center of gravity along belt wheel radial direction product poststack formed three dimendional blade.
(6) blade quantity is calculated, has been generated in 360 degree of circumference of synchronous pulley by being angularly distributed according to blade quantity
Whole synchronous pulley blade, and carry out belt wheel entirety three-dimensional modeling.
(7) by the way of test or Computer Numerical Simulation, structural strength verification and cooling performance are carried out to impeller
Verification reselects blade root outer radius if structural strength verification is unqualified, and blade tip inside radius returns to step (2), if
Cooling performance verification is unqualified, then the air mass flow for estimating synchronous pulley again returns to step (3), if two kinds of verifications are closed
Lattice, then complete design.
Detailed description of the invention
Fig. 1 is a kind of heat dissipation synchronous pulley equal axes axonometric drawing based on fan blade；
Fig. 2 is a kind of heat dissipation synchronous pulley front view based on fan blade；
Fig. 3 is a kind of heat dissipation synchronous pulley meridian cross-sectional view based on fan blade；
Fig. 4 is a kind of heat dissipation synchronous pulley design flow diagram based on fan blade.
Fig. 5 is a kind of heat dissipation synchronous pulley blade velocity triangle schematic diagram based on fan blade；
Fig. 6 is camber line design diagram in a kind of heat dissipation synchronous pulley blade based on fan blade；
Fig. 7 is a kind of heat dissipation synchronous pulley vane foil schematic diagram based on fan blade；
Fig. 8 is a kind of heat dissipation synchronous pulley blade root based on fan blade, Ye Zhong, the folded schematic diagram of blade tip blade profile product；
Fig. 9 is a kind of heat dissipation synchronous pulley three dimendional blade figure based on fan blade.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of heat dissipation synchronous pulley basic structure based on fan blade is divided into four parts, point
Not Wei blade root circle (1), blade (2), blade tip circle (3) and the gear teeth (4), four parts are entirety interconnected, can pass through one
Secondary property casting or whole Milling Process manufacture.
As shown in meridian cross-sectional view of Fig. 3 synchronous pulley along radial direction, (7) are band wheel shaft, and (6) are rotation side
To when belt wheel works, cooling air direction as shown in (5) arrow is flowed across impeller, and (2) are blade, and (4) are the gear teeth, and (8) are
Blade root inside radius, (9) are blade root outer radius, use RhIt indicates, (10) are blade tip inside radius RtIt indicates, (11) are blade tip outer radius,
(12) it is radius in leaf, uses RmIt indicates, and(13) it is blade meridian chord length, is indicated with B.
As shown in figure 4, the present invention is based on the heat dissipation synchronous pulley design cycle of fan blade the following steps are included:
Step 1: model parameter is selected according to GB/T 11361-2008 to synchronous pulley type selecting according to transmission demand: section
Away from, width at tooth space root, gullet depth, tooth slot radius, tooth fillet radius, radius at tooth tip, twice of pitch line differential determine belt wheel volume
Determine revolving speed.
Step 2: according to transmission and installation requirements, synchronous pulley basic parameter: the number of teeth, the facewidth, pitch diameter, gear half are designed
Diameter, as shown in figure 3, design synchronous belt wheel structure parameter: blade root inside radius (8), blade root outer radius (9), blade tip inside radius (10),
Blade tip outer radius (11), radius (12) in leaf, blade meridian chord length (13).
Step 3: according to cooling requirement, the air mass flow by synchronous pulley is estimated.
Step 4: according to air mass flow, belt wheel rated speed, blade tip inside radius, blade root outer radius and blade meridian chord length
Blade tip inside radius is calculated, the inlet and outlet relative wind angle of three radial locations of radius and blade root outer radius in leaf, according to calculating
Three obtained radial location imports and exports relative wind angle, designs camber line in the blade of three radial locations, detailed calculating side
Method is as follows:
Firstly, according to formula:It is calculated q (λ), in formulaFor step
Air mass flow, unit kg/m are estimated in three3,PtFor the stagnation pressure of air in belt wheel entrance working environment, unit Pa, by measuring
It obtains, if taking default parameters P without measured valuet=101325Pa, TtIt is single for the total temperature of air in belt wheel entrance working environment
Position is K, is obtained by measurement, if taking default parameters T without measured valuet=300K, RhAnd RtRespectively blade root outer radius and leaf
Sharp inside radius is the design value in step 2.According to formula:λ is calculated,
K is constant in formula, takes k=1.4.According to formula:Entrance Mach number Ma is calculated.
Secondly, according to formula:Inlet air static temperature T is calculateds, in formula, TtFor belt wheel
The total temperature of air in entrance working environment, according to formula:Velocity of sound a is calculated, R is constant in formula, and R=287J/
(kgK), according to formula: C=a × Ma calculates inlet air flow axial velocity C, and as shown in (14) in Fig. 5, and inlet air flow is axial
Speed (14) is parallel with inlet air flow speed (5).
Then, according to formula:Calculating radius is RiThe air-flow circumferential speed U at placei, N is belt wheel in formula
Rated speed, unit r/min, by Rh, Rm, RtIt substitutes into formula respectively and replaces Ri, it is calculated blade root, Ye Zhong, blade tip three
The air-flow circumferential speed U of radial locationh, Um, Ut, UiFor shown in (17) in Fig. 5, and (14) and (17) are mutually perpendicular in Fig. 5, root
According to triangle geometry relational expression:It is R that radius, which is calculated,iThe inlet air flow angle beta at place1i(19), unit is degree,
Radius is RiThe circumferential speed difference Δ W at placeiTo take Δ W shown in (18) in Fig. 5i=0.2Ui, according to formula:It is R that radius, which is calculated,iThe exit flow angle beta at place2i(20), unit is degree, is R according to radiusiPlace
Inlet air flow angle beta1i(19) and radius is RiThe exit flow angle beta at place2i(20) drawing radius respectively is RiThe inlet air flow at place
Direction (16) and radius are RiThe exit flow direction (15) at place, above-mentioned calculating in triplicate, calculate separately to obtain blade root, leaf
In, the inlet air flow angle of three radial locations of blade tip and outlet flow angle, and blade root is drawn, Ye Zhong, three radial locations of blade tip
Inlet air flow direction and exit flow direction.
Finally, by the above-mentioned blade root being calculated, Ye Zhong, the inlet air flow angle (19) of three radial locations of blade tip, entrance
Airflow direction (16), outlet flow angle (20), exit flow direction (15) are drawn according to shown in Fig. 6, according to formula:It calculates separately to obtain blade root, Ye Zhong, the middle camber line of three radial locations of blade tip
Radius (22), in formula, B is blade meridian chord length (13), β1iIt is R for radiusiThe inlet air flow angle (19) at place, β2iIt is R for radiusi
The outlet flow angle (20) at place, as shown in fig. 6, blade root is finally drawn, Ye Zhong, the middle camber line of three radial location blades of blade tip
(21)。
Step 5: as shown in fig. 7, by blade root, Ye Zhong, camber line is from import to outlet in the blade of three radial locations of blade tip
Blade profile (25), method are drawn by the equal thickness regularity of distribution are as follows: the radius of design thickness circle (23) is (24), by thickness circle
(23) camber line (21) is mobile along blade, and the trajectory line that thickness circle outer profile is formed after movement is blade profile (25).It finds
Blade center of gravity, according to formula:It is calculated center of gravity length (28), θ in formulaiIt is R for radiusiCamber line presss from both sides in place
Angle (26), unit are degree, and center of gravity angle (27) is the half of middle camber line angle, according to center of gravity length (28) and center of gravity angle
(27) position of blade center of gravity (29) can be determined.As shown in figure 8, by blade root blade profile (30), blade profile (31) in leaf,
The center of gravity (29) of (32) three radial location blade profiles of blade tip blade profile is folded along belt wheel radial direction product, finally obtains figure
Intact leaf shown in 9.
Step 6: calculating blade quantity, according to formula:Blade quantity, formula is calculated
In: RtFor blade tip inside radius, β1tFor blade tip inside radius position inlet air flow angle, β2tFor blade tip inside radius position outlet flow angle, B
Blade meridian chord length (13).Complete synchronization band is generated by being angularly distributed in 360 degree of circumference of synchronous pulley according to blade quantity
Impeller blade, and carry out belt wheel entirety three-dimensional modeling.
Step 7: by the way of test or Computer Numerical Simulation, structural strength verification and cooling are carried out to impeller
Qualification reselects blade tip inside radius and blade root outer radius, returns to step 2, such as if structural strength verification is unqualified
The verification of fruit cooling performance is unqualified, estimates the air mass flow of synchronous pulley again, returns to step 3, if verification in two weeks is closed
Lattice, then complete design.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, several improvement can also be made without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (1)
1. a kind of heat dissipation synchronous pulley design method based on fan blade, comprises the following steps: (1) according to transmission demand, pressing
According to GB/T 11361-2008 to synchronous pulley type selecting, model parameter: pitch is selected, width at tooth space root, gullet depth, tooth slot radius,
Tooth fillet radius, radius at tooth tip, twice of pitch line differential determine belt wheel rated speed, (2) according to transmission and installation requirements,
Design synchronous pulley basic parameter: the number of teeth, the facewidth, pitch diameter, half warp of gear, design synchronous belt wheel structure parameter: meridian chord length, leaf
Sharp outer radius, blade tip inside radius, blade root outer radius, blade root inside radius, radius in leaf, (3) are estimated according to cooling requirement by same
The air mass flow of belt wheel is walked, (4) are according to air mass flow, belt wheel rated speed, blade tip inside radius, blade root outer radius and meridian chord length
Calculate separately fan blade root, in, three radial locations of point into, export relative wind angle, according to three be calculated into,
Export relative wind angle, design camber line in the blade arc formula of three radial locations, (5) by blade root, in, sharp three radiuses
In the blade of position camber line from import to outlet by the equal thickness regularity of distribution generate blade profile thickness, and by its respectively center of gravity along belt wheel
Radial direction product poststack forms three dimendional blade, and (6) calculate blade quantity, according to blade quantity in 360 degree of circumference of synchronous pulley
By being angularly distributed, complete synchronization band impeller blade is generated, and carry out belt wheel entirety three-dimensional modeling, (7) are using test or calculate
The mode of machine numerical simulation carries out structural strength verification to impeller and cooling performance verifies, if structural strength verification is unqualified,
Blade root outer radius is then reselected, blade tip inside radius returns to step (2), if cooling performance verification is unqualified, estimates again
The air mass flow of synchronous pulley returns to step (3), if two kinds of verifications are qualified, complete design.
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| CN201910417777.0A CN110147608B (en) | 2019-05-20 | 2019-05-20 | Fan blade-based heat dissipation synchronous pulley design method |
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| CN201910417777.0A CN110147608B (en) | 2019-05-20 | 2019-05-20 | Fan blade-based heat dissipation synchronous pulley design method |
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| CN110147608B CN110147608B (en) | 2022-05-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030194327A1 (en) * | 1998-07-20 | 2003-10-16 | Nmb (Usa), Inc. | Impeller blade for axial flow fan having counter-rotating impellers |
| CN102945292A (en) * | 2012-09-24 | 2013-02-27 | 西安理工大学 | Method for determining wing-shaped oblique-flow cooling fan of automobile engine |
| JP2014240685A (en) * | 2013-06-11 | 2014-12-25 | 株式会社リコー | Gear design support method, program and device |
| CN206159420U (en) * | 2016-11-16 | 2017-05-10 | 福建双延兴业传动科技股份有限公司 | Synchronous pulley with self -cooling effect |
| CN107269583A (en) * | 2017-07-21 | 2017-10-20 | 哈尔滨工业大学 | A kind of super/transonic speed axial fan designs method based on high-order moment |
| CN206785971U (en) * | 2017-06-03 | 2017-12-22 | 福建双延兴业传动科技股份有限公司 | A kind of cooling type synchronous pulley |
-
2019
- 2019-05-20 CN CN201910417777.0A patent/CN110147608B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030194327A1 (en) * | 1998-07-20 | 2003-10-16 | Nmb (Usa), Inc. | Impeller blade for axial flow fan having counter-rotating impellers |
| CN102945292A (en) * | 2012-09-24 | 2013-02-27 | 西安理工大学 | Method for determining wing-shaped oblique-flow cooling fan of automobile engine |
| JP2014240685A (en) * | 2013-06-11 | 2014-12-25 | 株式会社リコー | Gear design support method, program and device |
| CN206159420U (en) * | 2016-11-16 | 2017-05-10 | 福建双延兴业传动科技股份有限公司 | Synchronous pulley with self -cooling effect |
| CN206785971U (en) * | 2017-06-03 | 2017-12-22 | 福建双延兴业传动科技股份有限公司 | A kind of cooling type synchronous pulley |
| CN107269583A (en) * | 2017-07-21 | 2017-10-20 | 哈尔滨工业大学 | A kind of super/transonic speed axial fan designs method based on high-order moment |
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