CN110173451A - A kind of blade tip is in the mining partial axial ventilator of W type structure - Google Patents
A kind of blade tip is in the mining partial axial ventilator of W type structure Download PDFInfo
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- CN110173451A CN110173451A CN201910607325.9A CN201910607325A CN110173451A CN 110173451 A CN110173451 A CN 110173451A CN 201910607325 A CN201910607325 A CN 201910607325A CN 110173451 A CN110173451 A CN 110173451A
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- impeller
- blade tip
- ventilation blower
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- 238000005065 mining Methods 0.000 title claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims abstract description 46
- 230000006698 induction Effects 0.000 claims abstract description 7
- 230000008030 elimination Effects 0.000 claims abstract description 6
- 238000003379 elimination reaction Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 3
- 235000011389 fruit/vegetable juice Nutrition 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000007634 remodeling Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 208000016285 Movement disease Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- 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
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to the technical fields of mining partial axial ventilator energy-saving and noise-reducing, more particularly to a kind of blade tip is in the mining partial axial ventilator blade of W type structure, it is characterized in that, including blade body, the blade tip of blade body is in W type grooving shape, a kind of local mine axial flow formula ventilation blower is also provided, is in blade, wind collecting unit, I grade of body, I grade of impeller, II grade of impeller, II grade of body, the Flame-Proof Three-Phase Induction Motors, noise elimination diffusing cone of W type grooving shape including blade tip.A kind of blade tip provided by the invention is in the ventilating vane of W type structure, slots in ventilating vane blade tip, W type structure is presented; design improved to tip structure under the premise of not increasing cost, simple process, expense is low; juice is set convenient for integration, is produced on a large scale.Meanwhile under the premise of guaranteeing the performance of ventilating of ventilation blower, ventilation blower exit velocity is improved, ventilating machine pneumatic noise is reduced, reduces the flow losses of ventilation blower, improves the efficiency of ventilation blower, extends ventilation blower service life.
Description
Technical field
The present invention relates to the technical field of mining partial axial ventilator energy-saving and noise-reducing more particularly to a kind of blade tips
In the mining partial axial ventilator of W type structure.
Background technique
Pneumatic efficiency is improved in turn in order to reduce flow losses and the aerodynamic noise of axial ventilator, countries in the world are ground
The person of studying carefully proposes various methods.Such as using sweepforward blade, twisted blade and soft side blade out.Above method is all logical
It crosses optimization blade construction parameter and designs new blade to change axial ventilator aerodynamic characteristic, to reduce axial ventilator
Aerodynamic noise, but change blade construction parameter and the new blade of design can all change axial ventilator structural dynamic characteristics,
So that problem is become complicated, increase influence factor, it is difficult to increase research.
The shortcomings that method to noise reduction of sweepforward blade, twisted blade, is: manufacture twisted blade process and technique compared with
It is higher to the machining accuracy and intensity requirement of blade for complexity, it increases manufacturing cost.It is soft go out side blade manufacturing cost be then
Several times of common blade, and it is not easy to integrated design.
In the energy loss of ventilation blower, flow losses are to influence one of the principal element of its drafting efficiency.Due to ventilation
The presence of machine casing, and to make the normal without hindrance rotation of impeller, then casing and vane tip necessarily have certain gap,
Just because of the gap of blade tip and casing makes tip vortex reduce and form tip leakage whirlpool.It is caused to reduce tip leakage vortex
Flow losses, the researcher of countries in the world carried out influence of the different cutting quantities to the performance of propeller fan to blade tip
Research, obtained blade tip cutting after, ventilation blower internal vortex disturbance state is improved, and ventilating vane blade tip is cut
Shape and cutting quantity are cut, the efficiency of ventilation blower and the generation of aerodynamic noise are all directly affected.
A kind of blade tip provided by the invention is in the axial ventilator blade of W type structure, is taking into account blower performance and section
Noise reduction and design can be improved to tip structure under the premise of not increasing cost, reduce the blade tip noise of ventilation blower, improvement
The stress condition of blade reduces the degree of fatigue of blade, extends the service life of axial ventilator, drops for axial ventilator
The exploration accumulation experiment for approach of making an uproar and design experiences.
Summary of the invention
The present invention changes tip structure in axial ventilator blade tip grooving, and W type structure is presented, logical taking into account
Fan performance and energy-saving and noise-reducing and design is improved to tip structure under the premise of not increasing cost, reduces the leaf of ventilation blower
Sharp noise reduces flow losses caused by tip leakage vortex, improves the stress condition of blade, reduce the degree of fatigue of blade,
Extend the service life of axial ventilator.
A kind of blade tip provided by the invention is in the axial ventilator blade of W type structure, including blade body, blade body
Blade tip position have W type grooving.
A kind of local mine axial flow formula ventilation blower provided by the invention, blade, collection wind including blade tip in W type structure
Device, I grade of body, I grade of impeller, II grade of impeller, II grade of body, Flame-Proof Three-Phase Induction Motors, noise elimination diffusing cone；Wind collecting unit with
I grade of body and II grade of body successively constitute the shell of local mine axial flow formula ventilation blower, and the blade of W type structure is separately fixed at
I grade of impeller and II grade of impeller are successively constituted on impeller, I grade of impeller is located in I grade of affiliated body, and II grade of impeller is located at II grade of machine
In vivo, noise elimination diffusing cone is located at the rear portion of II grade of impeller, and Flame-Proof Three-Phase Induction Motors respectively drive I grade of impeller and II grade of leaf
Wheel rotation.
A kind of blade tip provided by the invention is in the axial ventilator blade of W type structure, in axial ventilator blade and blade
Sharp grooving, changes tip structure, and W type structure is presented, improves design to tip structure under the premise of not increasing cost,
Simple process, expense is low, sets juice convenient for integration, is produced on a large scale.Meanwhile in the performance of ventilating for guaranteeing axial ventilator
Under the premise of, ventilation blower blade tip noise is reduced, the degree of fatigue of blade is reduced, improves the efficiency of ventilation blower, extending ventilation blower makes
Use the service life.
Detailed description of the invention
Illustrate the specific embodiment of the invention or technical solution in the prior art in order to clearer, it below will be to specific
Embodiment or attached drawing needed to be used in the description of the prior art do simple introduction, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the local mine axial flow formula ventilating vane leaf tip that blade tip provided in an embodiment of the present invention is in W type structure
The schematic diagram of position；
Fig. 2 is local mine axial flow formula fan impeller rotary area noise point layout signal provided in an embodiment of the present invention
Figure；
Fig. 3 is the wheel speed of the local mine axial flow formula ventilation blower in blade tip of the present invention remodeling front and back and the relationship of air outlet velocity
Change curve
Fig. 4 is the local mine axial flow formula fan impeller rotary area blade tip vorticity in blade tip of the present invention remodeling front and back from leaf
Take turns change curve when central plane different distance；
Fig. 5 is the maximum sound pressure of the local mine axial flow formula fan impeller rotary area noise in blade tip of the present invention remodeling front and back
Change curve of grade when from center of rotation axis different distance.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that the embodiment retouched
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless there are specific regulation and limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, can also can dismantling connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected: can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1, a kind of blade tip provided by the invention is in the axial ventilator blade of W type structure, including blade sheet
Body, the tip segment of blade body have a W type grooving, and blade tip includes that cutting groove depth h, grooving are wide in the geometric parameter of W type mechanism
Spend a, grooving angle, θ.
The present invention also provides a kind of local mine axial flow formula ventilation blower, blade, collection including blade tip in W type structure
Wind device, I grade of body, I grade of impeller, II grade of impeller, II grade of body, Flame-Proof Three-Phase Induction Motors, noise elimination diffusing cone；Wind collecting unit
The shell of local mine axial flow formula ventilation blower is successively constituted with I grade of body and II grade of body, the blade of W type structure is fixed respectively
I grade of impeller and II grade of impeller are successively constituted on impeller, I grade of impeller is located in I grade of affiliated body, and II grade of impeller is located at II grade
In body, noise elimination diffusing cone is located at the rear portion of II grade of impeller, and Flame-Proof Three-Phase Induction Motors respectively drive I grade of impeller and II grade
Wheel rotation.
In order to accurate pilot blade blade tip comprehensively not grooving and blade tip in the ventilation blower of W type structure inside basin whirlpool
Amount variation and impeller rotary area noise variation characteristic, adjust the distance the section ventilation blower inletpiston 1.45m (i.e. using acoustic array method
Impeller hub central cross-section) radial line on 7 measuring points analyzed, shown in specific test arrangement schematic diagram 2.Its test zone
3-D walls and floor is defined as, and using impeller hub center as coordinate origin, outlet axes direction is Z axis positive direction, to cross origin
Orthogonal radial direction is respectively X, Y-axis two-by-two, and establishes coordinate system, noise testing section as positive direction to be directed toward outside direction
Z axis coordinate be 0 mm, take 7 noise calculation points respectively in the radial direction, that is, Y direction in section, Y axis coordinate is respectively
270mm,290mm,310mm,330mm,350mm,370mm,390mm.The section to ventilation blower rotary area is calculated using numerical value
Vorticity analysis is carried out.Its 3-D walls and floor for analyzing section layout area is defined as, and is to sit with the ventilation blower import section center of circle
Dot is marked, impeller rotating shaft line is X-axis (to be directed toward export direction as positive direction), on import section, crosses the import section center of circle
Straight line be that Y-axis (to be directed toward casing direction as positive direction) establishes coordinate system, respectively select section 1(Z=- 40 mm), section 2(Z
=-20 mm), the mm of section 3(Z=0), the mm of section 4(Z=20), the mm of section 5(Z=40) carry out vorticity analysis.
In the present embodiment, three kinds of various sizes of W type tip structures are designed altogether, are W type blade tip 1(a=respectively
24.85mm, h=30mm, θ=45 °), W type blade tip 2(a=16.08mm, h=30mm, θ=30 °) and W type blade tip 3(a=
34.64mm, h=30mm, θ=60 °), axial ventilator blade compares with not retrofiting.Blade tip is found by comparative analysis
Grooving angle, θ=45 ° are got well than the aeroperformance of blade tip grooving angle, θ=30 ° and θ=60 °, therefore cutting with W type tip structure
Angle of the v-groove θ=45 ° are illustrated as test case.Specific method is the revolving speed that local mine fan is adjusted using frequency converter
Respectively 500 r/min, 1000 r/min, 1500 r/min, 2000 r/min, 2500 r/min, 3000 r/min, and utilize
Wind speed tachymeter is not respectively to retrofiting and the exit velocity of the ventilation blower of W type blade tip structure is surveyed under different rotating speeds
Amount, as shown in figure 3, in the slow-speed of revolution, the outlet of the ventilation blower for the ventilation blower exit velocity ratio W type blade tip structure that do not retrofit
Flow velocity is slightly higher, but does not retrofit as the exit velocity of the ventilation blower of the raising W type blade tip structure of wheel speed is gradually higher than
Ventilation blower, in rated speed the exit velocity of the ventilation blower of W type blade tip structure be 24.2m/s, the ventilation that do not retrofit
Machine exit velocity is 22.6m/s, it can be seen that the exit velocity of the ventilation blower of W type blade tip structure is in the increase with revolving speed
And increase, and be gradually higher than the ventilation blower that do not retrofit, in the case where rated speed, the ventilation blower of W type blade tip structure goes out
The increase by 7.07% that mouth velocity ratio is not retrofited.When wheel speed is rated speed 3000r/min, using the method for numerical value calculating
To analyze impeller rotary area in the vorticity variation with basin inside ventilation blower when W type tip structure of not retrofiting.As shown in figure 4, W
Tip vortex of the impeller of type tip structure at its import section is obviously smaller than what is do not retrofited, the reason is that W type tip structure was once
Big gap between blade tip and casing, so that the disturbance state of blade tip vortex is improved.It is cut with crossing the section of impeller rotating shaft line
Basin inside ventilation blower is taken, it can be found that, is circulated to axis by the vorticity observation analysis to remodeling front and back propeller fan entirety
The blade of blower, which carries out remodeling, can effectively break up the vorticity inside ventilation blower and integrate axial fan impeller part
Vorticity.The vorticity value of remodeling front ventilator impeller rotary area is 4062.32s-1, the whirlpool for rear venting machine impeller rotary area of retrofiting
Magnitude is 3515.36s-1, whirlpool of the impeller rotary area vorticity of propeller fan relative to propeller fan of not retrofiting after remodeling
Amount has dropped 15.56%.The vorticity value for front ventilator inside basin entirety of retrofiting is 1244.3s-1, rear venting machine inside stream of retrofiting
The vorticity value of domain entirety is 911.83s-1, the vorticity of propeller fan inside stream domain entirety is relative to axis circulation of not retrofiting after remodeling
The vorticity of blower entirety has dropped 36.46%.It follows that the W type tip structure after remodeling makes the whirlpool in basin inside ventilation blower
The phenomenon that amount is reduced, movement disorder is improved, and flow losses are minimized, and improve the efficiency of ventilation blower.By to axis stream
The observation analysis of fan impeller blade pressure obtains, by the cutting to axial fan impeller blade so that blade by
Laminate section has been transferred to the middle section of impeller blade by the tip segment of blade, and the high-pressure section of fan blade is beaten
It dissipates, increases compression area, reduce the degree of fatigue of blade, extend ventilation blower service life.
In the present embodiment, impeller is at same rotational speed 3000r/min, respectively to not retrofiting and W type tip structure leads to
Each noise calculation spot noise spectrogram is analyzed on the central cross-section of draught fan impeller rotary area, axial ventilator blade tip
The spectrogram of noise region is mainly the blade tip vortex shedding frequency generated by the rotation fundamental frequency and harmonic wave of fan impeller, blade rotation
Rate is constituted, and wherein frequency corresponding to maximum sound pressure level is the rotation fundamental frequency 700Hz of impeller.As seen from Figure 5, each noise is analyzed
The noise pattern of test point, obtain it is each calculate point at noise maximum sound pressure level, with Y axis coordinate value, that is, noise calculation point from
The distance in the place section center of circle is abscissa, and the maximum sound pressure level calculated a little is ordinate, and comparison is not retrofited and W type tip structure
Noise maximum sound pressure level change curve it is found that acoustic pressure of the W type tip structure at blade tip is obviously reduced, after remodeling than remodeling before
Blade tip noise averagely reduce 1.83%.It follows that W type tip structure reduces the production of tip vortex noise and rotational noise
It is raw.
By the remodeling of tip structure, blade tip provided by the invention is in the axial ventilator blade of W type structure, is being taken into account
Under the premise of blower performance, reduce ventilation blower blade tip noise and ventilation blower internal flow because vortex caused by flow losses,
Improve the stress condition of blade and the turbulent condition of ventilation blower internal flow, reduce the degree of fatigue of blade, it is logical to extend axial-flow type
The service life of blower.
Finally, it should be noted that the above various embodiments is only used to illustrate the technical scheme of the present invention, rather than its limitations；To the greatest extent
Invention is explained in detail referring to aforementioned symbol embodiment for pipe, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (2)
1. the mining partial axial ventilator that a kind of blade tip is in W type structure, which is characterized in that including blade body, leaf
The blade tip position of piece ontology has W type grooving；
The blade tip W type structural parameters are cutting groove depth h=30mm, notch width a=24.85mm, grooving angle, θ=45 °；
The mining partial axial ventilator, in the case where rated speed, exit velocity is than the local mine that blade is not retrofited
Increase by 7.07% with axial ventilator；
The mining partial axial ventilator is than the local mine axial flow formula fan impeller rotary area whirlpool that blade is not retrofited
Amount averagely reduces 15.56%；
Inside basin of the mining partial axial ventilator than the local mine axial flow formula ventilation blower complete machine that blade is not retrofited
Vorticity averagely reduces 36.46%；
The mining partial axial ventilator is more flat than the local mine axial flow formula fan impeller blade tip noise that blade is not retrofited
Reduce 1.83%.
2. a kind of part mine axial flow formula ventilation blower is it is characterised in that it includes blade tip as described in claim 1 is in W type knot
Blade, wind collecting unit, I grade of body, I grade of impeller, II grade of impeller, the II grade of body of structure；Flame-Proof Three-Phase Induction Motors are eliminated the noise and are expanded
Dissipate cone；
The wind collecting unit and I grade of affiliated body and II grade of body successively constitute the shell of local mine axial flow formula ventilation blower,
The blade of the W type structure, which is separately fixed on impeller, successively constitutes affiliated I grade of impeller and affiliated II grade of impeller, I grade of leaf
Wheel is located in I grade of affiliated body, and II grade of impeller is located in II grade of affiliated body, and the noise elimination diffusing cone is located at affiliated
II grade of impeller rear portion, the Flame-Proof Three-Phase Induction Motors respectively drive affiliated I grade of impeller and II grade of affiliated leaf
Wheel rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607325.9A CN110173451A (en) | 2019-07-07 | 2019-07-07 | A kind of blade tip is in the mining partial axial ventilator of W type structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607325.9A CN110173451A (en) | 2019-07-07 | 2019-07-07 | A kind of blade tip is in the mining partial axial ventilator of W type structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110173451A true CN110173451A (en) | 2019-08-27 |
Family
ID=67699904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910607325.9A Pending CN110173451A (en) | 2019-07-07 | 2019-07-07 | A kind of blade tip is in the mining partial axial ventilator of W type structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110173451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410879A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of blade tip is in the air-conditioner outdoor unit of W type structure |
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|---|---|---|---|---|
| CN2797709Y (en) * | 2005-06-21 | 2006-07-19 | 张志杰 | Three contra rotation impeller axial-flow local-ventilation fan |
| EP2884113A2 (en) * | 2013-12-16 | 2015-06-17 | LTM GmbH | Optimized axial fan |
| CN104963808A (en) * | 2015-07-22 | 2015-10-07 | 代元军 | Wind generator blade having W-shaped tips and wind generator |
| CN105756975A (en) * | 2016-04-26 | 2016-07-13 | 浙江理工大学 | Axial flow fan with blade front edges having groove structures and with blade root blowing effect |
| CN110145492A (en) * | 2019-07-06 | 2019-08-20 | 代元军 | A kind of mining partial axial ventilator of the V-shaped structure of blade tip |
| CN210484123U (en) * | 2019-07-07 | 2020-05-08 | 代元军 | Mining local axial-flow fan with W-shaped blade tips |
-
2019
- 2019-07-07 CN CN201910607325.9A patent/CN110173451A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2797709Y (en) * | 2005-06-21 | 2006-07-19 | 张志杰 | Three contra rotation impeller axial-flow local-ventilation fan |
| EP2884113A2 (en) * | 2013-12-16 | 2015-06-17 | LTM GmbH | Optimized axial fan |
| CN104963808A (en) * | 2015-07-22 | 2015-10-07 | 代元军 | Wind generator blade having W-shaped tips and wind generator |
| CN105756975A (en) * | 2016-04-26 | 2016-07-13 | 浙江理工大学 | Axial flow fan with blade front edges having groove structures and with blade root blowing effect |
| CN110145492A (en) * | 2019-07-06 | 2019-08-20 | 代元军 | A kind of mining partial axial ventilator of the V-shaped structure of blade tip |
| CN210484123U (en) * | 2019-07-07 | 2020-05-08 | 代元军 | Mining local axial-flow fan with W-shaped blade tips |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410879A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of blade tip is in the air-conditioner outdoor unit of W type structure |
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