CN105782130A - Unpowered draught fan with support frames as wing-shaped blades - Google Patents

Unpowered draught fan with support frames as wing-shaped blades Download PDF

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Publication number
CN105782130A
CN105782130A CN201610188057.8A CN201610188057A CN105782130A CN 105782130 A CN105782130 A CN 105782130A CN 201610188057 A CN201610188057 A CN 201610188057A CN 105782130 A CN105782130 A CN 105782130A
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airfoil fan
fan
end airfoil
notch
blade
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CN105782130B (en
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窦华书
李昆航
陈小平
魏义坤
杨徽
陈兴
迟少卿
王天垚
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Tongxiang Zhimeng Intellectual Property Operation Co ltd
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Zhejiang University of Technology ZJUT
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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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • 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
    • F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses an unpowered draught fan with support frames as wing-shaped blades. According to an existing unpowered draught fan, strong vortexes will be formed behind plate support frames, and the turbulence degree of a flow field is intensified. The lower-end support frame of the unpowered draught fan is formed by multiple lower-end wing-shaped blades, one end of each lower-end wing-shaped blade is fixed to the bottom of a center shaft, and the other end of each lower-end wing-shaped blade is fixed to the inner wall of an angle-changing pipe diameter; the upper-end support frame of the unpowered draught fan is formed by multiple upper-end wing-shaped blades, one end of each upper-end wing-shaped blade is fixed to a positioning sleeve, and the other end of each upper-end wing-shaped blade is fixed to the inner wall of a cylinder pipe diameter; the positioning sleeve is supported to the center shaft through a bearing; the chord length of the upper-end wing-shaped blades is larger than the chord length of the lower-end wing-shaped blades; the bottoms of the multiple air cutting blades are welded to the end face of the top of the cylinder pipe diameter, and the tops of the multiple air cutting blades and a turbine top plate are welded; and the top of the center shaft is supported into a bearing hole formed in the turbine top plate through a bearing. By means of the unpowered draught fan, flow disturbance of the flow field in the draught fan is improved, vibration of complex turbulence conditions on the draught fan is weakened, and the service life of the draught fan is prolonged.

Description

Bracing frame is the no-power air blower of airfoil fan
Technical field
The invention belongs to field of ventilation equipment, relate to no-power air blower, being specifically related to a kind of bracing frame is airfoil fan and the no-power air blower with notch.
Background technology
Ventilation blower is application surface a kind of universal machine widely, directs wind and chemical-process to mine ventilation, boiler greatly, little invariably adopts ventilation blower to industrial furnace air blast and air-conditioning, constructure ventilation etc..The ventilation blower of well-designed manufacture and reasonable employment, to energy-conservation significant with minimizing sound pollution.
Unpowered ventilation machine is one conventional in powerroof ventilator series, and being mainly used in community attic, hospital, dining room, gymnasium, large-sized workshop etc. needs to carry out the occasion of roof ventilation.No-power air blower is to utilize nature wind speed to promote the turbine of blower fan to rotate, and utilize the principle of indoor-outdoor air convection current, wind-force on windward side is caught by the blade on the impeller casing of whirlpool, promote blade, whirlpool impeller casing is made to rotate, simultaneously because rotating generation centrifugal force, air below turbine is discharged by induction between the blade of lee face, after discharging due to air, turbine is formed below area of low pressure, in order to maintain air dynamic equilibrium, air in high-pressure area will flow to area of low pressure naturally, the hot-air dirty along with roof is constantly discharged, outside room, fresh air constantly passes through window, the vents such as door are supplemented, to improve room ventilation ventilation, get rid of steam and dirty gas effectiveness.
No-power air blower is mainly made up of turbine, support, base three part.As the turbine portion of main element again by wind cutting blade, the part composition such as top turbine head, central shaft, bearing, positioning sleeve, the base portion as installing component is made up of parts such as angle caliber and water-proof substrate.Wind cutting blade design has certain distortion angle, and circumference is arrangement uniformly, provides major impetus source by catching the wind-force on blade for blower fan rotation.The two ends fixture of wind cutting blade is the cylinder caliber of top turbine head and blade end, completes the installation of blade in the way of riveted joint.How gradient factory roof is, it is possible to comes the roof of connecting fan main body and inclination by finely tuning the angle caliber of base portion, to ensure the horizontal installation requirement of blower fan.
Inside no-power air blower, there is two-layer bracing frame: upper end bracing frame is positioned at upper end cylinder caliber, be used for connecting bearing and cylinder caliber, play reinforced blade intensity, maintain the effect that blower fan rotates；Lower end bracing frame is positioned at lower end angle caliber, for connecting the angle caliber of central shaft and bottom.In no-power air blower, turbine portion is absent from directly outer rim and contacts with base portion, and namely cylinder caliber does not contact with angle caliber: the angle caliber water-proof substrate of bottom is fixed, and itself does not rotate.The cylinder caliber of turbine head rotates with turbine portion, and the upper end airfoil support frame as fixture is also rotate with identical angular velocity.
In the porch of no-power air blower, air-flow mainly axially flows into blower interior along central shaft, and after entering impeller, air-flow is gradually along central shaft Radial Flow.Therefore, near impeller eye, flow parameter changes greatly, complex flow, and how impeller eye air-flow being optimized is problem demanding prompt solution.
In existing no-power air blower, blower fan bracing frame mostly is flat part and is simply as securing member use.Not only not having improvement is made for the aeroperformance of no-power air blower, on the contrary because installing confusion to exacerbate the disturbance to the flowing of blower interior fluid, adding the turbulence intensity of air-flow so that the flow field of blower interior is more easily generated eddy current.At the rear of plate bracing frame, even can form stronger eddy current, exacerbate the turbulent extent in flow field.Along with the increase of blower interior turbulence intensity easily causes mechanical vibration, reduce the efficiency of ventilation blower, make noise raise.
Internal flow is subject to the vortex impact of existing plate bracing frame, is easily formed bigger vortex.The size of vortex with the change of bracing frame position, the size of compressor flow and different, the generation of eddy current and the aggravation of turbulence intensity are one of main sources of no-power air blower pitot loss and noise.
The increase of turbulence intensity not only exacerbates the unstability of flowing so that the stagnation pressure efficiency of blower fan reduces, and noise increases, and exacerbates the vibration of blower interior structure, is all great infringement to the life-span of bearing and the service life of blower fan.
Summary of the invention
It is an object of the invention to the present situations such as little for the effective pneumatic area of existing no-power air blower, blower interior bracing frame is unreasonable, caused blower interior flow disturbance is big, turbulence intensity is big etc. ultimately results in the problem that the static pressure efficiency caused is low, and the problem of noise that vortex is caused, it is provided that a kind of optimize flow field parameter and high efficiency, low noise, bracing frame are the no-power air blower of airfoil fan.
The present invention is made up of wind cutting blade, central shaft, bearing, positioning sleeve, cylinder caliber, upper end bracing frame, angle caliber, lower end bracing frame and turbine top board.Described lower end bracing frame is multi-disc lower end airfoil fan, and one end of lower end airfoil fan is fixed on bottom central shaft, and the other end is fixed on angle caliber inwall；Described upper end bracing frame is multi-disc upper end airfoil fan, and one end of upper end airfoil fan is fixed on positioning sleeve, and the other end is fixed on cylinder caliber inwall；Positioning sleeve is supported on center shaft by bearing；The internal diameter of described cylinder caliber is more than the top internal diameter of angle caliber；The chord length of upper end airfoil fan is more than the chord length of lower end airfoil fan；The bottom of multi-disc wind cutting blade is all welded in cylinder caliber top end face, and top is all welded with turbine top board；The top of central shaft is bearing in the support holes that turbine top board is offered by bearing.
Described upper end airfoil fan and the quantity of lower end airfoil fan are equal, select between 3～9 according to the internal diameter of cylinder caliber, and circumference is uniform, and rotation direction is all consistent with wind cutting blade.Angle between length direction and this upper end airfoil fan installed position tangent line on positioning sleeve of upper end airfoil fan is 60～90 °, and the angle between length direction and this lower end airfoil fan installed position tangent line on center shaft of lower end airfoil fan is 60～90 °；The established angle span of upper end airfoil fan is 30～60 °, and the established angle span of lower end airfoil support frame is 50～90 °, and the established angle of end airfoil fan is more than the established angle of lower end airfoil support frame.
The trailing edge of described upper end airfoil fan offers the multiple notches equidistantly arranged along length of blade direction；Notch be shaped as semicircle；Airfoil fan two ends, upper end do not offer notch with positioning sleeve and cylinder caliber inwall distance less than 2C1 place, and the centre-to-centre spacing of adjacent notch is C1～3C1, C1 is the chord length of upper end airfoil fan, and the diameter of notch is 0.1C1～0.3C1.
The no-power air blower model that bracing frame is airfoil fan is set up below by ANSYS optimization Simulation software, according to chord length to upper and lower end airfoil fan of the static pressure efficiency of no-power air blower, noise, effective pneumatic area and flow and established angle, the number of blade of upper and lower end airfoil fan, upper end airfoil fan notch be optimized, specific as follows:
1, by the chord length of upper and lower end airfoil fan and established angle, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter optimize static pressure efficiency and noise as design variable, solve the chord length of upper and lower end airfoil fan and the primary election interval of established angle, and the recommendation of the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter is interval.
2, reduce the chord length of upper and lower end airfoil fan and the primary election interval of established angle with effective pneumatic area for optimization aim, and the number of blade of primary election upper and lower end airfoil fan is interval.
3, chord length and the established angle of upper and lower end airfoil fan, the optimum interval of the number of blade of upper and lower end airfoil fan is determined with flow for optimization aim.
4, at the chord length of upper and lower end airfoil fan and established angle, in the optimum interval of the number of blade of upper and lower end airfoil fan, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter recommendation interval in choosing value so that the pneumatic property of comprehensive consideration meets fan operation requirement.The pneumatic property of comprehensive consideration includes the smoothness of central shaft vibration, bearing life, blade toggle speed, blower interior fluid flow line.
Beneficial effects of the present invention:
The present invention mainly designs in fan efficiency, fan noise, the flow of blower fan and product these angles in service life, and specific design is: lower end bracing frame is designed as the airfoil fan that sectional dimension is less；Upper end bracing frame is designed as the airfoil fan that sectional dimension is bigger, and the empennage end at airfoil fan has the notch that milling cutter mills out, and notch can reduce the boundary layer thickness at trailing edge place.
Beneficial effect after improvement has: (1) improves the stagnation pressure efficiency of blower fan；(2) reducing turbulence intensity, improving the stability of internal gas flow, thus reducing the noise of fan operation；(3) it is substantially improved the flow disturbance in blower interior flow field, weakens vibration blower interior structure caused because of complicated turbulent situations such as vortexes, extend the service life of blower fan and the life-span of bearing.
Accompanying drawing explanation
Fig. 1 is the fragmentary perspective cross sectional view of the present invention.
Fig. 2 is the partial enlarged drawing of I part in Fig. 1.
Fig. 3 is the partial enlarged drawing of II part in Fig. 1.
Fig. 4-1 is the established angle schematic diagram of upper end bracing frame.
Fig. 4-2 is the established angle schematic diagram of lower end bracing frame.
Fig. 5 is the force analysis figure on the airfoil fan cross section of upper end.
In figure: 1, wind cutting blade, 2, central shaft, 3, positioning sleeve, 4, cylinder caliber, 5, upper end bracing frame, 6, angle caliber, 7, lower end bracing frame.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1,2 and 3, bracing frame is the no-power air blower of airfoil fan, is made up of wind cutting blade 1, central shaft 2, bearing, positioning sleeve 3, cylinder caliber 4, upper end bracing frame 5, angle caliber 6, lower end bracing frame 7 and turbine top board.Lower end bracing frame 7 is multi-disc lower end airfoil fan, and one end of lower end airfoil fan is fixed on bottom central shaft 2, and the other end is fixed on angle caliber 6 inwall；Upper end bracing frame 5 is multi-disc upper end airfoil fan, and one end of upper end airfoil fan is fixed on positioning sleeve 3, and the other end is fixed on cylinder caliber 4 inwall；Positioning sleeve 3 is bearing on central shaft 2 by bearing；The internal diameter of cylinder caliber 4 is more than the top internal diameter of angle caliber 6；The chord length of upper end airfoil fan is more than the chord length of lower end airfoil fan；The bottom of multi-disc wind cutting blade 1 is all welded in cylinder caliber 4 top end face, and top is all welded with turbine top board；The top of central shaft 2 is bearing in the support holes that turbine top board is offered by bearing.
As shown in Fig. 4-1 and 4-2, the quantity of upper end airfoil fan and lower end airfoil fan is equal, selects between 3～9 according to the internal diameter of cylinder caliber 4, and circumference is uniform, and rotation direction is all consistent with wind cutting blade.Angle between length direction and this upper end airfoil fan installed position tangent line on positioning sleeve 3 of upper end airfoil fan is 60～90 °.Angle between length direction and this lower end airfoil fan installed position tangent line on central shaft 2 of lower end airfoil fan is 60～90 °.The established angle A span of upper end airfoil fan is 30～60 °, and the established angle B span of lower end airfoil support frame is 50～90 °, and the established angle of end airfoil fan is more than the established angle of lower end airfoil support frame.The established angle of airfoil fan is defined as on the side developed surface of central shaft 2, the angle between the string of a musical instrument of airfoil fan and this airfoil fan installed position tangent line.Because fluid flows predominantly axially when entering lower end angle caliber, flow velocity is relatively low, and flowing is comparatively steady, and the established angle of the airfoil fan of bottom should choose little setting angle herein, smooth to ensure fluid streamline when flowing into；After fluid flows into, along axis direction flow one segment distance enter expand blower fan cavity, now flow field is complicated, dynamic pressure receives the impact of wind cutting blade and becomes big, the established angle of upper strata airfoil fan herein should choose higher value, plays smooth streamline, reduces vortex and reduce the effect of turbulence intensity.
The trailing edge of upper end airfoil fan offers the multiple notches equidistantly arranged along length of blade direction.In order to suppress the boundary layer separation on surface further, reducing and separate whirlpool, make notch more conform to the feature of air motion, the shape of notch elects semicircle as；Airfoil fan two ends, upper end do not offer notch with positioning sleeve and cylinder caliber inwall distance less than 2C1 place, and the centre-to-centre spacing of adjacent notch is C1～3C1, C1 is the chord length of upper end airfoil fan, and the diameter of notch is 0.1C1～0.3C1.
The no-power air blower model that bracing frame is airfoil fan, the static pressure efficiency η according to no-power air blower is set up below by ANSYS optimization Simulation softwarest, noise, effective pneumatic area F and flow Q to the chord length of upper and lower end airfoil fan and established angle, the number of blade of upper and lower end airfoil fan, upper end airfoil fan notch be optimized；Flow Q includes convection current flow QS, siphon flow QWWith compound flow Qc。
1, by the chord length of upper and lower end airfoil fan and established angle, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter as design variable optimize static pressure efficiency ηstWith noise LA, solve the chord length of upper and lower end airfoil fan and the primary election interval of established angle, and the recommendation of the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter be interval.
The efficiency of blower fan generally represents by total pressure efficiency and static pressure efficiency, and what people effectively utilized is static pressure efficiency, the ratio that namely static pressure accounts in stagnation pressure.
The static pressure efficiency of blower fanWherein, Q is the flow of blower fan, and N is power of fan, the static pressure P of blower fanst=P-Pd, P is the stagnation pressure of blower fan, unemployed dynamic pressure in blower fanC is the average speed flowing through fan blade runner, ρ by the density of conveying gas.It can be seen that stagnation pressure P mono-timing, reduce dynamic pressure Pd, promote static pressure PstThe static pressure efficiency of blower fan will be improved.
Lower end bracing frame 7 is equivalent to fixed guide vane, optimizes incoming flow fluid so that the speed of incoming flow direction of blower fan is consistent.Dynamic pressure formula can be seen that, reduce flow velocity C and can make the dynamic pressure P of blower fandReduce.Meanwhile, the established angle A of blower fan upper end bracing frame is not only smooth incoming flow fluid, also function to the effect of partial rcsponse speed of incoming flow C so that stream air is stopped at upper end bracing frame, reduces dynamic pressure, improves static pressure, at the static pressure P of upper end bracing frame tail endstBigger, provide, for final workpiece wind cutting blade, the stable air-flow that flows that incoming flow dynamic pressure is low, static pressure is high.Upper end bracing frame and lower end bracing frame interact so that the static pressure efficiency η of blower fanstIncrease.
Main noise source in blower fan has: the mechanical noise of (1) bearing, the noise of (2) drive motor, (3) aerodynamic noise.No-power air blower is absent from drive motor, the mechanical noise of bearing, is far smaller than aerodynamic noise, therefore, mainly considers the impact of aerodynamic noise (eddy current crack and boundary layer thickness).
Eddy current crack is primarily referred to as the uneven air-flow of gas generation disturbance formation compression and Thinning Process and fluid and periodically acts on what these two aspects on wall caused.Boundarv layer noise refers to that fluid forms turbulent boundary layer near wall place air-flow, complex flow in turbulent boundary layer, along with the noise that the fluctuation pressure of the broken of whirlpool with turbulent flow is formed.
Here, the turbulence intensity of fluid is more low, and the disturbance of flowing is more little, and the strength of vortex of vortex is more low, and corresponding eddy current crack will reduce.Reduce the thickness of its boundary region after the bracing frame otch of upper end to a certain extent, improve wake characteristic, decrease the size of wake's flow field, advantageously reduce noise LA.Bracing frame cross section, upper end is bigger, boundary region is thicker and vortex can be bigger, and the existence of the too small then notch of notch does not have an effect clearly for reducing boundary layer thickness, but the oversize intensity that not only can reduce upper end bracing frame of notch, more can form little vortex in notch, worsen flowing.
When designing bracing frame established angle A, B, upper end bracing frame selects established angle A to be higher value, and now comparatively smooth runner also makes the gas through upper end bracing frame smoother, and eddy current is less, and turbulence intensity substantially reduces, and noise also can reduce accordingly.
2, reduce the chord length of upper and lower end airfoil fan and the primary election interval of established angle with effective pneumatic area for optimization aim, and the number of blade of primary election upper and lower end airfoil fan is interval.
The effective pneumatic area F=C of blower fand*At, AtFor the cross-sectional area of angle caliber, CdFor blower fan efflux coefficient.The established angle B of lower end airfoil fan is more big, and the projection on throat face (cross section of angle caliber) is more little, and then blower fan efflux coefficient CdIncrease.
Along with the number of blade of upper end airfoil fan increases, the interlobate runner of two panels will diminish accordingly, and the reduction of runner can weaken the intensity of Ye Daonei axial eddy；Lower end bracing frame is being not main workpiece, and the existence of lower end bracing frame is primarily to provide for upper end bracing frame and wind cutting blade and flows to single flowing, and the number of blade of lower end airfoil fan too much can reduce laryngeal airway area.
By leaf coral denseness empirical equationSolve the internal diameter that number of blade Z, r are angle caliber of airfoil fan；Leaf coral denseness τ value is 0.2～0.3；Bracing frame width of blade b is relevant with aerofoil profile model；Solving the Z value drawn to round and obtain the number of blade, the Z after rounding in the scope of 3～9, need to otherwise redesign Z value.
3, chord length and the established angle of upper and lower end airfoil fan, the optimum interval of the number of blade of upper and lower end airfoil fan is determined with flow Q for optimization aim.
The gas flow of no-power air blower mainly includes convection current flowAnd siphon flowTwo parts；Convection current is the main type of flow in no-power air blower, and convection current flow is flow produced by flowing pressure.In formula, PSFor to flowing pressure, PwFor siphon pressure, effective pneumatic area F=Cd*At。
The established angle B of lower end airfoil fan is more big, and the projection on throat face (cross section of angle caliber) is more little, and then blower fan efflux coefficient CdIncrease.It is referred to convection current flow formula and siphon flow formula, blower fan efflux coefficient CdIncrease make no-power air blower flowing pressure and siphon pressure are had rising, and then convection current flow and siphon flow are all increased to some extent.
4, at the chord length of upper and lower end airfoil fan and established angle, in the optimum interval of the number of blade of upper and lower end airfoil fan, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter recommendation interval in choosing value so that the pneumatic property of comprehensive consideration meets fan operation requirement.The pneumatic property of comprehensive consideration includes the smoothness of central shaft vibration, bearing life, blade toggle speed, blower interior fluid flow line.
Again done structural design at upper end bracing frame and lower end bracing frame, adopted the good airfoil fan of aeroperformance, can effectively improve the flow field condition within no-power air blower.Lower end bracing frame does not rotate, and gas enters no-power air blower through lower end bracing frame, under the guide functions of lower end bracing frame, and smooth inflow blower interior.Upper end bracing frame rotates with blade, plays the effect splitting smooth flow field.Therefore, the turbulence intensity of the interior flow field of Unpowered ventilation machine has had obvious reduction, improves the strength of vortex in flow field, reduces blower fan structure vibration, also extends the life-span of bearing and the service life of blower fan to a certain extent simultaneously.
The established angle of upper end airfoil fan is relatively big, and now blade is not only had lift F by fluid2, and also have the thrust F of direction of rotation1Effect.As it is shown in figure 5, the gas carrying out flow path direction at bracing frame place, upper end can being perpendicular to the direction of blade to blade with thrust so that blade toggle speed is lower.
The structural design of two-layer airfoil support frame makes the streamline more fairing of fluid, increases static pressure Pst, reduce dynamic pressure Pd, improve static pressure efficiency ηst, dynamic pressure PdReduction also make stable the bleeding of blower fan.
Simultaneously, air with dust and moist steam is more reasonable because of flowing at blower interior, vortex structure is less, streamline more fairing, make what grieshoch can be smooth go out rather than fall in the parts such as bearing, not only increasing scavenging efficiency, also make the dust in bearing reduce, bearing life is longer, greatly slow down the vibrations between machine internal structure, blower fan is more robust.

Claims (1)

1. bracing frame is the no-power air blower of airfoil fan, it is made up of wind cutting blade, central shaft, bearing, positioning sleeve, cylinder caliber, upper end bracing frame, angle caliber, lower end bracing frame and turbine top board, it is characterized in that: described lower end bracing frame is multi-disc lower end airfoil fan, one end of lower end airfoil fan is fixed on bottom central shaft, and the other end is fixed on angle caliber inwall；Described upper end bracing frame is multi-disc upper end airfoil fan, and one end of upper end airfoil fan is fixed on positioning sleeve, and the other end is fixed on cylinder caliber inwall；Positioning sleeve is supported on center shaft by bearing；The internal diameter of described cylinder caliber is more than the top internal diameter of angle caliber；The chord length of upper end airfoil fan is more than the chord length of lower end airfoil fan；The bottom of multi-disc wind cutting blade is all welded in cylinder caliber top end face, and top is all welded with turbine top board；The top of central shaft is bearing in the support holes that turbine top board is offered by bearing；
Described upper end airfoil fan and the quantity of lower end airfoil fan are equal, select between 3～9 according to the internal diameter of cylinder caliber, and circumference is uniform, and rotation direction is all consistent with wind cutting blade；Angle between length direction and this upper end airfoil fan installed position tangent line on positioning sleeve of upper end airfoil fan is 60～90 °, and the angle between length direction and this lower end airfoil fan installed position tangent line on center shaft of lower end airfoil fan is 60～90 °；The established angle span of upper end airfoil fan is 30～60 °, and the established angle span of lower end airfoil support frame is 50～90 °, and the established angle of end airfoil fan is more than the established angle of lower end airfoil support frame；
The trailing edge of described upper end airfoil fan offers the multiple notches equidistantly arranged along length of blade direction；Notch be shaped as semicircle；Airfoil fan two ends, upper end do not offer notch with positioning sleeve and cylinder caliber inwall distance less than 2C1 place, and the centre-to-centre spacing of adjacent notch is C1～3C1, C1 is the chord length of upper end airfoil fan, and the diameter of notch is 0.1C1～0.3C1；
The no-power air blower model that bracing frame is airfoil fan is set up below by ANSYS optimization Simulation software, according to chord length to upper and lower end airfoil fan of the static pressure efficiency of no-power air blower, noise, effective pneumatic area and flow and established angle, the number of blade of upper and lower end airfoil fan, upper end airfoil fan notch be optimized, specific as follows:
1, by the chord length of upper and lower end airfoil fan and established angle, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter optimize static pressure efficiency and noise as design variable, solve the chord length of upper and lower end airfoil fan and the primary election interval of established angle, and the recommendation of the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter is interval；
2, reduce the chord length of upper and lower end airfoil fan and the primary election interval of established angle with effective pneumatic area for optimization aim, and the number of blade of primary election upper and lower end airfoil fan is interval；
3, chord length and the established angle of upper and lower end airfoil fan, the optimum interval of the number of blade of upper and lower end airfoil fan is determined with flow for optimization aim；
4, at the chord length of upper and lower end airfoil fan and established angle, in the optimum interval of the number of blade of upper and lower end airfoil fan, the centre-to-centre spacing of the adjacent notch of upper end airfoil fan, notch diameter recommendation interval in choosing value so that the pneumatic property of comprehensive consideration meets fan operation requirement；The pneumatic property of comprehensive consideration includes the smoothness of central shaft vibration, bearing life, blade toggle speed, blower interior fluid flow line.
CN201610188057.8A 2016-03-29 2016-03-29 Support frame is the no-power air blower of airfoil fan Active CN105782130B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107654410A (en) * 2017-08-17 2018-02-02 衢州市柯城区土肥与农村能源技术推广站 A kind of no-power air blower, its manufacture method and application
CN109918830A (en) * 2019-03-20 2019-06-21 浙江理工大学 Swirl generating body blade forming design method for milling cutter
CN110285084A (en) * 2019-07-10 2019-09-27 南华大学 Rotary pulse is vortexed air supply device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001034983A1 (en) * 1999-11-10 2001-05-17 Alliedsignal Inc. Axial fan
JP2004027858A (en) * 2002-06-21 2004-01-29 Hitachi Industries Co Ltd Jet fan
CN2918808Y (en) * 2006-03-20 2007-07-04 王文波 Energy-saving type heatproof antiseptic draught fan
DE202011004708U1 (en) * 2010-08-12 2011-07-14 Ziehl-Abegg Ag fan
CN104675748A (en) * 2015-01-27 2015-06-03 浙江理工大学 Low-noise volute-free centrifugal ventilator with channels
CN204878021U (en) * 2015-07-30 2015-12-16 沈阳盛纳机械制造有限公司 Axial fan device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001034983A1 (en) * 1999-11-10 2001-05-17 Alliedsignal Inc. Axial fan
JP2004027858A (en) * 2002-06-21 2004-01-29 Hitachi Industries Co Ltd Jet fan
CN2918808Y (en) * 2006-03-20 2007-07-04 王文波 Energy-saving type heatproof antiseptic draught fan
DE202011004708U1 (en) * 2010-08-12 2011-07-14 Ziehl-Abegg Ag fan
CN104675748A (en) * 2015-01-27 2015-06-03 浙江理工大学 Low-noise volute-free centrifugal ventilator with channels
CN204878021U (en) * 2015-07-30 2015-12-16 沈阳盛纳机械制造有限公司 Axial fan device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107654410A (en) * 2017-08-17 2018-02-02 衢州市柯城区土肥与农村能源技术推广站 A kind of no-power air blower, its manufacture method and application
CN109918830A (en) * 2019-03-20 2019-06-21 浙江理工大学 Swirl generating body blade forming design method for milling cutter
CN109918830B (en) * 2019-03-20 2023-05-16 浙江理工大学 Design method of vortex generator blade forming milling cutter
CN110285084A (en) * 2019-07-10 2019-09-27 南华大学 Rotary pulse is vortexed air supply device

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