CN110374919A - A kind of cold axial flow blower impeller of noise reduction ring - Google Patents
A kind of cold axial flow blower impeller of noise reduction ring Download PDFInfo
- Publication number
- CN110374919A CN110374919A CN201910764397.4A CN201910764397A CN110374919A CN 110374919 A CN110374919 A CN 110374919A CN 201910764397 A CN201910764397 A CN 201910764397A CN 110374919 A CN110374919 A CN 110374919A
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- CN
- China
- Prior art keywords
- fixing axle
- blade
- spherical surface
- outside
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
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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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
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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
- F04D29/32—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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of cold axial flow blower impellers of noise reduction ring, include impeller body and several blades, several blades are arranged on the outside of impeller body and along impeller body circumferential direction equidistantly distributed, blade is rotatably arranged on the outside of impeller body and is locked by retaining mechanism, and 360 degree of blade angle adjustable.Blade of the present invention 360 degree of angular adjustments can not need to design many grinding tools, greatly reduce the production cost of blower on impeller so as to adjust the effect of oneself needs according to different occasion needs.
Description
Technical field
The present invention relates to a kind of impeller, especially a kind of cold axial flow blower impeller of noise reduction ring.
Background technique
Axial flow blower, purposes is very extensive, is exactly and the equidirectional air-flow of the axis of fan blade, such as electric fan, outdoor machine of air-conditioner wind
Fan is exactly that axis stream mode runs blower.Why it is known as " axial-flow type ", is because gas is parallel to fan shaft flowing.Axial-flow type wind
Machine is generally used for that traffic requirement is higher and the lower occasion of pressure requirements.The fixed position of axial fan simultaneously keeps air mobile.Axis
Flow fan is mainly made of draught fan impeller and casing, and structure is simple but data demand is very high.The leaf of traditional axial flow blower
Blade on wheel mainly uses fixed form, and after blade is fixed on impeller, blade is not just adjustable, some are directly
It is welded on impeller, adjusting can not be replaced, however in unused application, it needs that the angle of blade is adjusted to reach
To different circulation effects, this just needs to design the impeller of different styles for these different occasions, and the production cost is very high.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of cold axial flow blower impellers of noise reduction ring, can carry out leaf
Piece angular adjustment.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of cold axial flow blower impeller of noise reduction ring, it is characterised in that: include impeller body and several blades, several blade settings
On the outside of impeller body and along impeller body circumferential direction equidistantly distributed, blade is rotatably arranged on the outside of impeller body and leads to
It crosses retaining mechanism to be locked, 360 degree of blade angle adjustable.
Further, the blade includes blade body, fixing axle and shaft end limit portion, and fixing axle is cylindrical axis body,
Blade body lower end is fixedly connected with fixing axle upper end, and shaft end limit portion is the centrum that upper end is in arc-shaped protrusion, shaft end limit
Subordinate end is round and matches with fixing axle that shaft end limit subordinate end is fixedly connected with fixing axle upper end, in shaft end limit portion
It lateral blade body smooth contraction and is fixedly connected with blade body two sides.
Further, the shaft end limit portion and fixing axle connecting portion, which are provided with, is raised in shaft end limit portion bottom sides
Annular protrusion.
Further, the impeller body includes the axis of main body plectane, outside spherical surface wheel rim, two sides reinforcing rib and centre
Set, main body plectane are circular flat plate structure, and axle sleeve, which is fixed in the middle position of main body plectane and axle sleeve, to be provided with and electricity
The matched axis hole of machine shaft, outside spherical surface wheel rim are that the outer side ring surface of annular wheel rim and outside spherical surface wheel rim is spherical surface, two sides
Reinforcing rib is separately fixed at the two sides of main body plectane.
Further, the lower end edge of the blade body is aduncate arc-shaped side edge, and arc-shaped side edge is curved
Curvature and the spherical surface of outside spherical surface wheel rim are mutually matched.
Further, the retaining mechanism includes fixing axle sleeve and anchor ear, is opened on the outside spherical surface of outside spherical surface wheel rim
Have and corresponds to circular hole position with the matched circular hole of the fixing axle of blade, main body plectane and be provided with and the matched recess of fixing axle, blade
Fixing axle in recess on the outside of the spherical surface wheel rim of outside along circular hole insertion main body plectane, fixing axle sleeve is cylindrical tube
And fixing axle sleeve one end is plane, and the fixing axle sleeve other end is the matched spherical surface of inner ring surface with outside spherical surface wheel rim,
Fixing axle sleeve is set in the fixing axle of blade and spherical surface one end and is resisted against on the inner ring surface of outside spherical surface wheel rim, fixing axle
End position is provided with one and the matched annular groove of anchor ear on the lower, and recess two sides have one and match with anchor ear clamping screw
Screw hole, two panels anchor ear is fastened in annular groove from two sides respectively, and two clamping screws are each passed through two panels anchor ear both ends
Anchor ear is locked by aperture and the screw hole of recess two sides.
Further, it is opened respectively in axial direction on the two panels anchor ear there are two axial screw hole, two bolt insertion settings exist
In axial screw hole and being tightened makes bolt end compress regulation on the end face of fixing axle sleeve plane one end.
Further, it is provided on the outside spherical surface of the outside spherical surface wheel rim and the matched circular hole of the fixing axle of blade, circle
Cylindrical fixed block is fixed on main body plectane on the inside of hole, fixed block is provided with and the matched blind hole of the fixing axle of blade, blind hole
Opening portion is overlapped with the circular hole of outside spherical surface wheel rim, and the fixing axle of blade is arranged in blind hole by circular hole insertion, and cylinder is fixed
Block side is provided with the screw hole perpendicular to fixing axle axial direction, and bolt is inserted into screw hole and blade fixed axle is locked cylindrical fixed
In block.
Compared with prior art, the present invention having the following advantages that and effect: a kind of cold axial flow blower of noise reduction ring of the invention
With impeller, blade can on impeller 360 degree of angular adjustments, so as to be needed according to different occasions to adjust oneself need
The effect wanted does not need to design many grinding tools, greatly reduces the production cost of blower；The installation and adjustment structure of blade is simply square
Just, blade is easy for installation, and assembly efficiency is high；Impeller circle outer ring surface uses spherical surface, matches with blade bottom camber line, stress and straight line
Compared to more uniform, avoid blade impaired；For blade fixed axle using dual fixation axially and radially, structure is more firm, keeps away
Exempt from blade shake.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the cold axial flow blower impeller of noise reduction ring of the invention.
Fig. 2 is a kind of side view of the cold axial flow blower impeller of noise reduction ring of the invention.
Fig. 3 is the schematic diagram of blade of the invention.
Fig. 4 is the schematic diagram of anchor ear of the invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment 1:
As depicted in figs. 1 and 2, the cold axial flow blower impeller of a kind of noise reduction ring of the invention includes impeller body 1 and several blades
2, in 1 outside of impeller body and along the circumferential equidistantly distributed of impeller body 1, blade 2 is rotatably arranged on for several settings of blade 2
It is locked on the outside of impeller body 1 and by retaining mechanism, 360 degree of 2 angle of blade is adjustable.
As shown in figure 3, blade 2 includes blade body 3, fixing axle 4 and shaft end limit portion 5, fixing axle 4 is cylindrical shaft
Body, 3 lower end of blade body are fixedly connected with 4 upper end of fixing axle, and shaft end limit portion 5 is the centrum that upper end is in arc-shaped protrusion, axis
End 5 lower end of limiting section is round and matches with fixing axle 4 that 5 lower end of shaft end limit portion is fixedly connected with 4 upper end of fixing axle, axis
It holds lateral 3 smooth contraction of blade body on limiting section 5 and is fixedly connected with 3 two sides of blade body.Shaft end limit portion 5 and fixation
4 connecting portion of axis is provided with the annular protrusion 6 for being raised in shaft end limit portion bottom sides, and annular protrusion 6 can install blade 2
It is limited.
Impeller body 1 includes the axle sleeve 10 of main body plectane 7, outside spherical surface wheel rim 8, two sides reinforcing rib 9 and centre, main body circle
Plate 7 is circular flat plate structure, and axle sleeve 10 is fixed in the middle position of main body plectane 7 and axle sleeve 10 to be provided with to be turned with motor
The matched axis hole of axis, outside spherical surface wheel rim 8 are that the outer side ring surface of annular wheel rim and outside spherical surface wheel rim 8 is spherical surface, and two sides add
Strengthening tendons 9 are separately fixed at the two sides of main body plectane 7 to reinforce to main body plectane 7 and outside spherical surface wheel rim 8.Blade body
3 lower end edge is aduncate arc-shaped side edge, and the curvature on arc-shaped side edge and the spherical surface of outside spherical surface wheel rim 8 are mutual
Matching, using the cooperation of this spherical surface, blade 2 can carry out that adjusting, and 2 bottom of blade is freely rotated along 360 degree of spherical surface
Always it is closely adjacent to spherical surface, it is more uniformly more reliable than the stress of straight line, it ensure that the service life of blade.
As shown in figure 4, retaining mechanism includes fixing axle sleeve 11 and anchor ear 12, on the outside spherical surface of outside spherical surface wheel rim 8
It is provided with the matched circular hole of fixing axle 4 with blade 2, the corresponding circular hole position of main body plectane 7 is provided with and the matched recess of fixing axle 4
13, the fixing axle 4 of blade 2 is inserted into the recess 13 of main body plectane 7 from 8 outside of outside spherical surface wheel rim along circular hole, fixed hub
Cylinder 11 is cylindrical tube and 11 one end of fixing axle sleeve is plane, and 11 other end of fixing axle sleeve is and outside spherical surface wheel rim
The matched spherical surface of 8 inner ring surface, fixing axle sleeve 11 is set in the fixing axle 4 of blade 2 and spherical surface one end is resisted against outside
On the inner ring surface of spherical surface wheel rim 8, end position is provided with one and the matched annular groove 14 of anchor ear 12, recess 13 to fixing axle 4 on the lower
Two sides have one and the matched screw hole of 12 clamping screw of anchor ear, and two panels anchor ear 12 is fastened on annular groove from two sides respectively
In 14, two clamping screws are each passed through the aperture at 12 both ends of two panels anchor ear and anchor ear is locked by the screw hole of recess two sides.
It is opened respectively in axial direction on two panels anchor ear 12 there are two axial screw hole 15, two bolt insertions are arranged in axial screw hole 15 and revolve
Fastening makes bolt end compress regulation on 11 plane one end end face of fixing axle sleeve.
Embodiment 2:
A kind of cold axial flow blower impeller of noise reduction ring, includes impeller body 1 and several blades 2, and several blades 2 are arranged in impeller sheet
On the outside of body 1 and along the circumferential equidistantly distributed of impeller body 1, blade 2 is rotatably arranged on 1 outside of impeller body and passes through lock
Tight mechanism is locked, and 360 degree of 2 angle of blade is adjustable.
As shown in figure 3, blade 2 includes blade body 3, fixing axle 4 and shaft end limit portion 5, fixing axle 4 is cylindrical shaft
Body, 3 lower end of blade body are fixedly connected with 4 upper end of fixing axle, and shaft end limit portion 5 is the centrum that upper end is in arc-shaped protrusion, axis
End 5 lower end of limiting section is round and matches with fixing axle 4 that 5 lower end of shaft end limit portion is fixedly connected with 4 upper end of fixing axle, axis
It holds lateral 3 smooth contraction of blade body on limiting section 5 and is fixedly connected with 3 two sides of blade body.Shaft end limit portion 5 and fixation
4 connecting portion of axis is provided with the annular protrusion 6 for being raised in shaft end limit portion bottom sides, and annular protrusion 6 can install blade 2
It is limited.
Impeller body 1 includes the axle sleeve 10 of main body plectane 7, outside spherical surface wheel rim 8, two sides reinforcing rib 9 and centre, main body circle
Plate 7 is circular flat plate structure, and axle sleeve 10 is fixed in the middle position of main body plectane 7 and axle sleeve 10 to be provided with to be turned with motor
The matched axis hole of axis, outside spherical surface wheel rim 8 are that the outer side ring surface of annular wheel rim and outside spherical surface wheel rim 8 is spherical surface, and two sides add
Strengthening tendons 9 are separately fixed at the two sides of main body plectane 7 to reinforce to main body plectane 7 and outside spherical surface wheel rim 8.Blade body
3 lower end edge is aduncate arc-shaped side edge, and the curvature on arc-shaped side edge and the spherical surface of outside spherical surface wheel rim 8 are mutual
Matching, using the cooperation of this spherical surface, blade 2 can carry out that adjusting, and 2 bottom of blade is freely rotated along 360 degree of spherical surface
Always it is closely adjacent to spherical surface, it is more uniformly more reliable than the stress of straight line, it ensure that the service life of blade.
Locking mechanism structure are as follows: the matched circle of fixing axle 4 with blade 2 is provided on the outside spherical surface of outside spherical surface wheel rim 8
Hole is fixed with cylindrical fixed block on the main body plectane 7 on the inside of circular hole, and fixed block is provided with matched blind with the fixing axle 4 of blade 2
Hole, blind hole opening portion are overlapped with the circular hole of outside spherical surface wheel rim 8, and the fixing axle 4 of blade 2 is arranged in blind hole by circular hole insertion,
Cylindrical fixed block side is provided with the screw hole perpendicular to fixing axle axial direction, and blade fixed axle is locked by bolt insertion screw hole
In cylindrical fixed block.
The cold axial flow blower impeller of a kind of noise reduction ring of the invention, blade can on impeller 360 degree of angular adjustments, thus
It can be needed not needing to design many grinding tools, greatly reduce wind to adjust the effect of oneself needs according to different occasions
The production cost of machine；The installation and adjustment structure of blade is simple and convenient, and blade is easy for installation, and assembly efficiency is high；Impeller circle outer ring surface
It using spherical surface, is matched with blade bottom camber line, stress is more uniform compared with straight line, avoids blade impaired；Blade fixed axle is adopted
With dual fixation axially and radially, structure is more firm, and blade is avoided to shake.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, only
It should belong to guarantor of the invention without departing from the content or beyond the scope defined by this claim of description of the invention
Protect range.
Claims (8)
1. a kind of cold axial flow blower impeller of noise reduction ring, it is characterised in that: include impeller body and several blades, several blades are set
Set on the outside of impeller body and along impeller body circumferential direction equidistantly distributed, blade be rotatably arranged on the outside of impeller body and
It is locked by retaining mechanism, 360 degree of blade angle adjustable.
2. the cold axial flow blower impeller of a kind of noise reduction ring described in accordance with the claim 1, it is characterised in that: the blade includes leaf
Piece ontology, fixing axle and shaft end limit portion, fixing axle are cylindrical axis body, the fixed company in blade body lower end and fixing axle upper end
It connects, shaft end limit portion is the centrum that upper end is in arc-shaped protrusion, and shaft end limit subordinate end is round and matches with fixing axle, axis
End limiting section lower end be fixedly connected with fixing axle upper end, in shaft end limit portion lateral blade body smooth contraction and with blade sheet
Body two sides are fixedly connected.
3. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 2, it is characterised in that: the shaft end limit portion
The annular protrusion for being raised in shaft end limit portion bottom sides is provided with fixing axle connecting portion.
4. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 2, it is characterised in that: the impeller body packet
Plectane containing main body, outside spherical surface wheel rim, two sides reinforcing rib and intermediate axle sleeve, main body plectane are circular flat plate structure, and axle sleeve is solid
Calmly be arranged in the middle position and axle sleeve of main body plectane be provided with the matched axis hole of machine shaft, outside spherical surface wheel rim be ring
The outer side ring surface of shape wheel rim and outside spherical surface wheel rim is spherical surface, and two sides reinforcing rib is separately fixed at the two sides of main body plectane.
5. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 4, it is characterised in that: the blade body
Lower end edge is aduncate arc-shaped side edge, and mutual, spherical surface of the curvature on arc-shaped side edge and outside spherical surface wheel rim
Match.
6. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 4, it is characterised in that: the retaining mechanism packet
Sleeve containing fixing axle and anchor ear are provided with and the matched circular hole of the fixing axle of blade, main body on the outside spherical surface of outside spherical surface wheel rim
Plectane correspond to circular hole position be provided with the matched recess of fixing axle, the fixing axle of blade is on the outside of the spherical surface wheel rim of outside along circle
Hole is inserted into the recess of main body plectane, and fixing axle sleeve is cylindrical tube and fixing axle sleeve one end is plane, fixing axle
The sleeve other end is the matched spherical surface of inner ring surface with outside spherical surface wheel rim, and fixing axle sleeve is set in the fixing axle of blade simultaneously
And spherical surface one end is resisted against on the inner ring surface of outside spherical surface wheel rim, end position is provided with one and the matched ring of anchor ear to fixing axle on the lower
Connected in star, recess two sides have one and the matched screw hole of anchor ear clamping screw, and two panels anchor ear is fastened on from two sides respectively
In annular groove, two clamping screws are each passed through the aperture at two panels anchor ear both ends and the screw hole of recess two sides locks anchor ear admittedly
It is fixed.
7. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 6, it is characterised in that: on the two panels anchor ear
Axial screw hole there are two opening respectively in axial direction, two bolts insertions, which are arranged in axial screw hole and are tightened, makes bolt end
Regulation is compressed on the end face of fixing axle sleeve plane one end.
8. the cold axial flow blower impeller of a kind of noise reduction ring according to claim 4, it is characterised in that: the outside spherical surface wheel
It is provided on the outside spherical surface of circle with the matched circular hole of the fixing axle of blade, is fixed on the main body plectane on the inside of circular hole cylindrical solid
Determine block, fixed block, which is provided with, to be overlapped with the matched blind hole of the fixing axle of blade, blind hole opening portion with the circular hole of outside spherical surface wheel rim, leaf
The fixing axle of piece is arranged in blind hole by circular hole insertion, and cylindrical fixed block side is provided with the screw hole perpendicular to fixing axle axial direction,
Blade fixed axle is locked in cylindrical fixed block by bolt insertion screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764397.4A CN110374919A (en) | 2019-08-19 | 2019-08-19 | A kind of cold axial flow blower impeller of noise reduction ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764397.4A CN110374919A (en) | 2019-08-19 | 2019-08-19 | A kind of cold axial flow blower impeller of noise reduction ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110374919A true CN110374919A (en) | 2019-10-25 |
Family
ID=68259794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764397.4A Pending CN110374919A (en) | 2019-08-19 | 2019-08-19 | A kind of cold axial flow blower impeller of noise reduction ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110374919A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1024081A2 (en) * | 1999-01-29 | 2000-08-02 | Mühlbauer Luftfahrttechnik GmbH | Blade root for propellers and rotor blades |
| CN205136122U (en) * | 2015-11-26 | 2016-04-06 | 湖南科技大学 | Blade angle adjustable axial fan impeller |
| CN107524617A (en) * | 2017-08-24 | 2017-12-29 | 南通迪瓦特节能风机有限公司 | The cold axial flow blower of noise reduction ring |
| CN108443223A (en) * | 2018-05-27 | 2018-08-24 | 东莞市兴东电子有限公司 | A kind of adjustable flabellum component of fan blade angles |
| CN105637227B (en) * | 2014-06-24 | 2018-11-06 | Tlt-涡轮有限公司 | Impeller for axial flow blower |
-
2019
- 2019-08-19 CN CN201910764397.4A patent/CN110374919A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1024081A2 (en) * | 1999-01-29 | 2000-08-02 | Mühlbauer Luftfahrttechnik GmbH | Blade root for propellers and rotor blades |
| CN105637227B (en) * | 2014-06-24 | 2018-11-06 | Tlt-涡轮有限公司 | Impeller for axial flow blower |
| CN205136122U (en) * | 2015-11-26 | 2016-04-06 | 湖南科技大学 | Blade angle adjustable axial fan impeller |
| CN107524617A (en) * | 2017-08-24 | 2017-12-29 | 南通迪瓦特节能风机有限公司 | The cold axial flow blower of noise reduction ring |
| CN108443223A (en) * | 2018-05-27 | 2018-08-24 | 东莞市兴东电子有限公司 | A kind of adjustable flabellum component of fan blade angles |
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Application publication date: 20191025 |