CN209180091U - A kind of axial-flow fan blade regulating mechanism and blower - Google Patents
A kind of axial-flow fan blade regulating mechanism and blower Download PDFInfo
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- CN209180091U CN209180091U CN201821880513.6U CN201821880513U CN209180091U CN 209180091 U CN209180091 U CN 209180091U CN 201821880513 U CN201821880513 U CN 201821880513U CN 209180091 U CN209180091 U CN 209180091U
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Abstract
The utility model provides a kind of axial-flow fan blade regulating mechanism and blower, belongs to axial flow blower technical field.It includes wheel hub, hub, multiple blades, transmission component and driving assembly；Hub is mounted on wheel hub；Transmission component is installed in rotation on wheel hub, and the other end is connect with multiple vane belts；Multiple blades are uniformly distributed in the circumferential direction of hub；Driving assembly and transmission component are sequentially connected, and driving assembly adjusts the angle of multiple blades by the rotation of driving transmission component.Transmission component is built in wheel hub, driving assembly realizes the adjustment of the angle of multiple blades by driving transmission component rotation, and integrally-built stability is good.
Description
Technical field
The utility model relates to axial flow blower technical field more particularly to a kind of axial-flow fan blade regulating mechanisms and wind
Machine.
Background technique
Axial flow blower is industrially widely used in the gas flows such as thermal power generation, steel, chemical industry, environmentally friendly exhaust-gas treatment
The continuous work occasion for needing dynamic regulation to change.Mechanical energy is converted by impeller rotation acting when such propeller fan works
For gas kinetic energy；Change guide vane or blade angle, or changes wheel speed and control gas flow.It is according to angle in blade working
No variation can be divided into two major classes: stator blade blower and movable vane blower, wherein movable vane blower is divided into adjusting rotor blade blower and movable vane not again
Adjustable fan (is just adjustable blade angle) after shutdown.
Blade angle is adjusted using hydraulic device in the prior art, since revolving speed is big, due to vibration etc., leads in blower work
Regulating device is caused often to will appear hydraulic oil leakage and mechanism the problems such as stability is poor in operation.
Utility model content
The purpose of this utility model is to provide a kind of axial-flow fan blade regulating mechanism and blowers, it is intended to solve existing skill
Hydraulic device adjusts the problem of the stability difference of blade angle in art.
To achieve the above object, the technical solution of the utility model is:
A kind of axial-flow fan blade regulating mechanism, the axial-flow fan blade regulating mechanism include wheel hub, hub, Duo Geye
Piece, transmission component and driving assembly；
The hub is mounted on the wheel hub；
The transmission component is installed in rotation on the wheel hub, and the other end is connect with multiple vane belts；
Multiple blades are uniformly distributed in the circumferential direction along the wheel hub；
The driving component and the transmission component are sequentially connected, and the driving component is by driving the transmission component rotation
Transfer the angle for adjusting multiple blades.
As a kind of optimal technical scheme of the utility model, the transmission component include multiple sharfs, multiple cranks,
Multiple sliding blocks, push-plate and connector；Multiple sharfs are installed in rotation on respectively on the wheel hub, multiple leaves
One end of bobbin and one end of multiple cranks are sequentially connected, and the other end is connect with multiple vane belts；It is multiple described
The other end of crank is sequentially connected with one end of multiple sliding blocks respectively, and the other end of the sliding block is slidably connected to institute
State push-plate；The push-plate is mounted in the driving component, and the driving component can drive the push-plate to move.
As a kind of optimal technical scheme of the utility model, the transmission component includes bearing combination, multiple leaves
Bobbin passes through the bearing combination respectively and is rotatably coupled with the wheel hub.
As a kind of optimal technical scheme of the utility model, the axial-flow fan blade regulating mechanism include support plate and
Shield, the support plate are mounted in the wheel hub side, and the shield is mounted on side of the wheel hub far from the hub
On, the shield is located in the support plate.
As a kind of optimal technical scheme of the utility model, the connector includes ball screw assembly, first straight line axis
Hold secondary and second straight line bearing pair；The both ends of the first straight line bearing pair are connect with the hub, the support plate respectively,
The both ends of the second straight line bearing pair are connect with the hub, the support plate respectively, the first straight line bearing pair and institute
State the setting of second straight line bearing pair parallel interval；One end of the ball screw assembly, is installed in rotation on the hub, separately
One end passes through the support plate, and is sequentially connected with the driving component；The ball screw assembly, is parallel to the first straight line
Bearing pair, the second straight line bearing pair, and it is in the gap of the first straight line bearing pair and the second straight line bearing pair
Between.
As a kind of optimal technical scheme of the utility model, bearing saddle bore, the ball wire are offered on the hub
One end of thick stick pair is installed in rotation in the bearing saddle bore.
As a kind of optimal technical scheme of the utility model, the driving component include support frame, retarder, motor,
Slip ring, connecting rod and power supply；Support frame as described above is mounted in the support plate, and in the shield；The retarder peace
On support frame as described above, the other end of the ball screw assembly, is connect with the retarder；One end of the motor with it is described
Retarder transmission connection, the other end are electrically connected with one end of the slip ring；The slip ring is mounted on the shield, the slip ring
The other end be electrically connected with one end of the connecting rod, the other end of the connecting rod and the power electric connection.
As a kind of optimal technical scheme of the utility model, the other end of the motor passes through electric wire and the slip ring
Terminal electrical connection.
As a kind of optimal technical scheme of the utility model, the driving component includes angular transducer, the angle
Sensor is mounted on the wheel hub, and is passed through the support plate and be electrically connected with the slip ring.
A kind of blower, the blower include above-described axial-flow fan blade regulating mechanism.
The beneficial effects of the utility model are:
The utility model provides a kind of axial-flow fan blade regulating mechanism, axial-flow fan blade regulating mechanism include wheel hub,
Hub, multiple blades, transmission component and driving assembly；In the axial-flow fan blade regulating mechanism, blade is mounted on blade
On one end of axis；Sharf is combined by bearing and is assembled together with wheel hub, and hub is fixed together with wheel hub, sharf
The other end connect with crank by flat key, crank is connected with sliding block by oscillating bearing, and sliding block is mounted in the sliding slot of push-plate；
Push-plate is fixed on the nut of ball screw assembly, and is mounted on first straight line bearing pair, second straight line bearing pair and linear axis
It holds on secondary linear bearing；One end of ball screw assembly, is mounted in the bearing saddle bore of hub, the other end peace of ball screw assembly,
In the bearing hole of support plate, and passes through support plate and be connected with shaft coupling, the other end of shaft coupling and the output shaft of retarder
It is fixedly connected, retarder is fixedly mounted on the support frame, and support frame is fixedly mounted in support plate, the output shaft of motor and deceleration
The input shaft of device is connected, and is fixedly mounted on retarder, and push-plate is fixed on first straight line bearing pair, second straight line bearing pair
On；First straight line bearing pair, second straight line bearing pair one end be fixed on hub, and the other end of the two is fixed on support
On disk, support plate is fixed on wheel hub；Meanwhile angular transducer is fixedly mounted on wheel hub, and pass through support plate circular hole with
Slip ring electrical connection；Shield is fixedly mounted on wheel hub, and slip ring is fixedly mounted on shield；Also, the electric wire of motor and slip ring
Terminal connection, the transmission line of angular transducer and the terminal of slip ring connect；The other end of connecting rod and slip ring passes through joint ball bearing
It is connected, the other end of connecting rod is connected with connecting rod base by joint ball bearing, and the power line and signal wire of the slip ring other end pass through company
The inner hole of bar is drawn, and is electrically connected to a power source.
The working principle of the structure: external power is moved by power line along connecting rod, slip ring control and driving motor, motor
By driving ball screw assembly, movement after retarder reduction of speed and torque-increasing, ball screw assembly, drives push-plate to be axially moved, and push-plate pushes away
Movable slider, crank rotate to realize the adjustment of blade angle around sharf；Angular transducer directly measures the angle of sharf
And obtain the aperture of blade.Wherein, push-plate is mounted in guide rail linear axis pair, first straight line bearing pair and second straight line bearing
Pair undertakes the gravity of push-plate and limits it and circumferentially rotates, and support plate supports retarder, and retarder supports motor, and shield support is slided
Ring；The signal of angular transducer is used to control the operating of motor by signal road after spreading out of.
As a result, to realize that the running blade of axial flow blower is continuously adjustable, the utility model is using connecting rod+slip ring+electronic
The scheme of machine+retarder+push-plate+crank block "；In the present solution, motor, retarder are built into wheel hub, on the one hand, no
The case where need to arranging petrol station, that is, being not in hydraulic oil leakage, reduce pollution；On the other hand, power transmission is transmitted by slip ring
It realizes, slip ring only realizes electric power and signal transmission, is not subject to radial force and axial force, abrasion is less and structural stability is good；Due to
Using slip ring conduction, built-in rotary angle transmitter in the wheel hub, therefore for hydraulic control system, which can be with
Obtain accurate blade angle data；By dynamic angle data judge blade whether bite, avoid traditional Hydraulic Power Transmission System
The phenomenon that causing pull rod to damage due to bite.
The utility model provides a kind of blower by above-mentioned design, which there is above-mentioned axial-flow fan blade to adjust machine
Structure, having the characteristics that structure, simply and in operational process stability is strong.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is the structural schematic diagram of axial-flow fan blade regulating mechanism provided by the embodiment of the utility model；
Fig. 2 is the structural representation of the first angle of axial-flow fan blade regulating mechanism provided by the embodiment of the utility model
Figure；
Fig. 3 is the structural representation of the second angle of axial-flow fan blade regulating mechanism provided by the embodiment of the utility model
Figure；
Fig. 4 is the structural representation of the third angle of axial-flow fan blade regulating mechanism provided by the embodiment of the utility model
Figure.
Icon: 1- axial-flow fan blade regulating mechanism；2- wheel hub；3- hub；4- blade；5- transmission component；6- driving group
Part；7- sharf；8- crank；9- sliding block；10- push-plate；11- connector；The combination of 12- bearing；13- support plate；14- shield；15-
Ball screw assembly,；16- first straight line bearing pair；17- second straight line bearing pair；18- support frame；19- retarder；20- motor；
21- slip ring；22- connecting rod；23- angular transducer.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term " on ", "lower"
For be based on the orientation or positional relationship shown in the drawings or the utility model product using when the orientation or position usually put
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, in the present invention unless specifically defined or limited otherwise, fisrt feature on second feature or
Under may include that the first and second features directly contact, may include the first and second features be not direct contact but logical yet
Cross the other characterisation contact between them.Moreover, fisrt feature is on second feature, top and above include fisrt feature
Right above second feature and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is
Under two features, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature
Level height is less than second feature.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Embodiment:
The present embodiment provides a kind of blowers comprising axial-flow fan blade regulating mechanism 1, specific structure is as follows to be explained
It states.
Please refer to Fig. 1, referring to Figure 2 to Figure 4, axial-flow fan blade regulating mechanism 1 includes wheel hub 2, hub 3, multiple for cooperation
Blade 4, transmission component 5 and driving assembly 6；Hub 3 is installed on the hub 2；Transmission component 5 is installed in rotation on wheel hub 2
On, the other end and multiple blades 4 are sequentially connected；Multiple blades 4 are uniformly distributed in the circumferential direction along wheel hub 2；Driving assembly 6
It is sequentially connected with transmission component 5, driving assembly 6 adjusts the angle of multiple blades 4 by the rotation of driving transmission component 5.
Wherein, transmission component 5 includes multiple sharfs 7, multiple cranks 8, multiple sliding blocks 9, push-plate 10 and connector 11；
Multiple sharfs 7 are installed in rotation on respectively on wheel hub 2, and one end of one end of multiple sharfs 7 and multiple cranks 8, which is driven, to be connected
It connects, the other end and multiple blades 4 are sequentially connected；The other end of multiple cranks 8 is sequentially connected with one end of multiple sliding blocks 9 respectively,
The other end of sliding block 9 is slidably connected to push-plate 10；Due to offering a sliding slot on push-plate 10, sliding block 9 slideably connects
It is connected in sliding slot；Push-plate 10 is mounted on driving assembly 6, and driving assembly 6 can drive push-plate 10 to move, and then drives sharf
7 rotations, driving blade 4 adjust angle.
It should be noted that in the present embodiment, transmission component 5 includes bearing combination 12, and multiple sharfs 7 pass through respectively
Bearing combination 12 is rotatably coupled with wheel hub 2.
It should be noted that in the present embodiment, axial-flow fan blade regulating mechanism 1 includes support plate 13 and shield 14,
Support plate 13 is mounted in 2 side of wheel hub, and shield 14 is mounted on side of the wheel hub 2 far from hub 3, and shield 14 is located at support
On disk 13.
Wherein, connector 11 includes ball screw assembly, 15, first straight line bearing pair 16 and second straight line bearing pair 17；The
The both ends of one linear bearing pair 16 are connect with hub 3, support plate 13 respectively, the both ends of second straight line bearing pair 17 respectively with hub
3, support plate 13 connects, and first straight line bearing pair 16 and 17 parallel interval of second straight line bearing pair are arranged；Ball screw assembly, 15
One end is installed in rotation on hub 3, and the other end passes through support plate 13, and is sequentially connected with driving assembly 6；Ball screw assembly,
15 are parallel to first straight line bearing pair 16, second straight line bearing pair 17, and are in first straight line bearing pair 16 and second straight line axis
Between the interval for holding pair 17.
It should be noted that in the present embodiment, bearing saddle bore is offered on hub 3, one end of ball screw assembly, 15 can
It is rotatably mounted in bearing saddle bore.
Wherein, driving assembly 6 includes support frame 18, retarder 19, motor 20, slip ring 21, connecting rod 22 and power supply；Support
Frame 18 is mounted in support plate 13, and in shield 14；Retarder 19 is mounted on support frame 18, ball screw assembly, 15 it is another
One end is connect with retarder 19；One end of motor 20 and retarder 19 are sequentially connected, and the other end is electrically connected with one end of slip ring 21；
Slip ring 21 is mounted on shield 14, and the other end of slip ring 21 is electrically connected with one end of connecting rod 22, the other end and power supply of connecting rod 22
Electrical connection.
It should be noted that in the present embodiment, the other end of motor 20 is electrically connected by electric wire with the terminal of slip ring 21.
It should be noted that in the present embodiment, driving assembly 6 includes angular transducer 23, angular transducer 23 is fixed
Installation on the hub 2, and is electrically connected across the circular hole of support plate 13 with slip ring 21.
Also, the electric wire of motor 20 is connect with the terminal of slip ring 21, the transmission line of angular transducer 23 and the end of slip ring 21
Son connection；Connecting rod 22 is connected with the other end of slip ring 21 by joint ball bearing, and 22, the other end and the connecting rod of connecting rod 22 passes through
Joint ball bearing is connected, and the power line and signal wire of 21 other end of slip ring are drawn by the inner hole of connecting rod 22, with external power supply
Electrical connection.
The working principle of the axial-flow fan blade regulating mechanism 1 is:
External power (i.e. power supply) is moved by power line along connecting rod 22, the control of slip ring 21 and driving motor 20, motor 20
By driving ball screw assembly, 15 to move after 19 reduction of speed of retarder and torque-increasing, ball screw assembly, 15 drives the axial fortune of push-plate 10
Dynamic, push-plate 10 pushes sliding block 9, crank 8 to rotate to realize the adjustment of 4 angle of blade around sharf 7；Angular transducer 23 is direct
It measures the angle of sharf 7 and obtains the aperture of blade 4.Wherein, push-plate 10 is mounted in guide rail linear axis pair, first straight line axis
It holds pair 16 and second straight line bearing pair 17 undertakes the gravity of push-plate 10 and limits it and circumferentially rotates, support plate 13 supports retarder
19, retarder 19 supports motor 20,14 supporting slip ring 21 of shield；The signal of angular transducer 23 is used for after being spread out of by signal road
Control the operating of motor 20.
As a result, to realize that the running blade 4 of axial flow blower is continuously adjustable, the utility model uses " connecting rod 22+ slip ring 21
+ motor+retarder 19+ push-plate 10+ crank 8+ sliding block 9 " scheme；In the present solution, motor, retarder 19 are built into wheel
In hub 2, on the one hand, be not required to arrangement petrol station, reduce pollution；On the other hand, power transmission is transmitted by slip ring 21 and is realized, slip ring 21
It only realizes electric power and signal transmission, is not subject to radial force and axial force, and without radial and axial movement, abrasion is less and stable structure
Property is good；Due to using 21 conduction of slip ring, built-in rotary angle transmitter in the wheel hub 2, therefore come relative to hydraulic control system
It says, which can obtain accurate 4 angle-data of blade；By dynamic angle data judge blade 4 whether bite, avoid tradition
Hydraulic Power Transmission System the phenomenon that causing pull rod to damage due to bite.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of axial-flow fan blade regulating mechanism, which is characterized in that the axial-flow fan blade regulating mechanism includes wheel hub, hub
Disk, multiple blades, transmission component and driving assembly；
The hub is mounted on the wheel hub；
The transmission component is installed in rotation on the wheel hub, and the other end is connect with multiple vane belts；
Multiple blades are uniformly distributed in the circumferential direction along the wheel hub；
The driving component and the transmission component are sequentially connected, the driving component by drive the transmission component rotation come
Adjust the angle of multiple blades.
2. axial-flow fan blade regulating mechanism according to claim 1, which is characterized in that the transmission component includes multiple
Sharf, multiple cranks, multiple sliding blocks, push-plate and connector；Multiple sharfs are installed in rotation on described respectively
On wheel hub, one end of one end of multiple sharfs and multiple cranks is sequentially connected, the other end and multiple blades
Transmission connection；The other end of multiple cranks respectively with one end of multiple sliding blocks be sequentially connected, the sliding block it is another
End is slidably connected to the push-plate；The push-plate is mounted in the driving component, and the driving component can drive institute
State push-plate movement.
3. axial-flow fan blade regulating mechanism according to claim 2, which is characterized in that the transmission component includes bearing
Combination, multiple sharfs pass through the bearing combination respectively and are rotatably coupled with the wheel hub.
4. axial-flow fan blade regulating mechanism according to claim 2, which is characterized in that the axial-flow fan blade is adjusted
Mechanism includes support plate and shield, and the support plate is mounted in the wheel hub side, and it is remote that the shield is mounted on the wheel hub
On side from the hub, the shield is located in the support plate.
5. axial-flow fan blade regulating mechanism according to claim 4, which is characterized in that the connector includes ball wire
Thick stick pair, first straight line bearing pair and second straight line bearing pair；The both ends of the first straight line bearing pair respectively with the hub,
The support plate connection, the both ends of the second straight line bearing pair are connect with the hub, the support plate respectively, and described first
Linear bearing pair and the second straight line bearing pair parallel interval are arranged；One end of the ball screw assembly, is installed in rotation on
On the hub, the other end passes through the support plate, and is sequentially connected with the driving component；The ball screw assembly, is parallel to
The first straight line bearing pair, the second straight line bearing pair, and it is in the first straight line bearing pair and the second straight line
Between the gap of bearing pair.
6. axial-flow fan blade regulating mechanism according to claim 5, which is characterized in that offer bearing on the hub
Bore, one end of the ball screw assembly, are installed in rotation in the bearing saddle bore.
7. axial-flow fan blade regulating mechanism according to claim 5, which is characterized in that the driving component includes support
Frame, retarder, motor, slip ring, connecting rod and power supply；Support frame as described above is mounted in the support plate, and is in the shield
It is interior；The retarder is mounted on support frame as described above, and the other end of the ball screw assembly, is connect with the retarder；The electricity
One end of machine and the retarder are sequentially connected, and the other end is electrically connected with one end of the slip ring；The slip ring is mounted on described
On shield, the other end of the slip ring is connect with one end of the connecting rod, and the other end of the connecting rod is connect with the power supply.
8. axial-flow fan blade regulating mechanism according to claim 7, which is characterized in that the other end of the motor passes through
Electric wire is electrically connected with the terminal of the slip ring.
9. axial-flow fan blade regulating mechanism according to claim 7, which is characterized in that the driving component includes angle
Sensor, the angular transducer are mounted on the wheel hub, and are passed through the support plate and be electrically connected with the slip ring.
10. a kind of blower, which is characterized in that the blower includes the described in any item axial-flow fan blade tune of claim 1 to 9
Save mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821880513.6U CN209180091U (en) | 2018-11-14 | 2018-11-14 | A kind of axial-flow fan blade regulating mechanism and blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821880513.6U CN209180091U (en) | 2018-11-14 | 2018-11-14 | A kind of axial-flow fan blade regulating mechanism and blower |
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| Publication Number | Publication Date |
|---|---|
| CN209180091U true CN209180091U (en) | 2019-07-30 |
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ID=67364408
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821880513.6U Active CN209180091U (en) | 2018-11-14 | 2018-11-14 | A kind of axial-flow fan blade regulating mechanism and blower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236715A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of axial-flow fan blade regulating mechanism and blower |
| CN109236716A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of fan blade electric adjusting mechanism and blower |
-
2018
- 2018-11-14 CN CN201821880513.6U patent/CN209180091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236715A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of axial-flow fan blade regulating mechanism and blower |
| CN109236716A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of fan blade electric adjusting mechanism and blower |
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