CN115419612A - Automatic variable-pitch blade device of axial flow fan - Google Patents
Automatic variable-pitch blade device of axial flow fan Download PDFInfo
- Publication number
- CN115419612A CN115419612A CN202211134213.4A CN202211134213A CN115419612A CN 115419612 A CN115419612 A CN 115419612A CN 202211134213 A CN202211134213 A CN 202211134213A CN 115419612 A CN115419612 A CN 115419612A
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- Prior art keywords
- sleeve
- adjusting
- guide ring
- axial guide
- blade
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- 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.)
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Classifications
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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
- F04D29/362—Blade mountings adjustable during rotation
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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
- F04D29/325—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
- F04D29/66—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
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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 belongs to the field of axial flow fans, and relates to an automatic variable pitch blade device of an axial flow fan. The method comprises the following steps: the adjusting device comprises an axial guide ring (11), an adjusting electric cylinder (12), a plurality of connecting rods (14), an end cover (16), an adjusting sleeve compression nut (17), an adjusting sleeve (18), a rotating bearing (24) and an adjusting sleeve distance sleeve (25), wherein the annular axial guide ring (11) is sleeved with an inner ring of a hub (10) and is relatively fixed through a rectangular guide key (20), and the adjusting sleeve (18) penetrates through the axial guide ring (11) and then is connected with the output end of the adjusting electric cylinder (12); the rotating bearing (24) is connected with the outer side of the adjusting sleeve (18) and the middle sleeve of the axial guide ring (11); the adjusting sleeve distance sleeve (25) and the adjusting sleeve compression nut (17) are sequentially sleeved at the end part of the adjusting sleeve (18); the connecting rods (14) are axially arranged, one ends of the connecting rods (14) are hinged with the outer side of the axial guide ring (11), and the other ends of the connecting rods (14) are hinged with a mounting shaft at the root of the blade (9). The paddle can be automatically changed.
Description
Technical Field
The invention belongs to the field of axial flow fans, and particularly relates to an automatic variable pitch blade device of an axial flow fan.
Background
The power/fan system has strict requirements in the industries of ventilation, wind tunnel, environmental test, high altitude simulation, electric power and the like, and particularly the large fan supercharging system. In a conventional impeller assembly of a power/fan system, a blade and a hub are separate members, and are connected into a whole by bolts. During system debugging of each working condition, the mounting angle of the blade needs to be manually adjusted to find an optimal working point, and then the blade and the hub are fixed as final components. This inevitably leads to sub-optimal fan system efficiency at different operating points, i.e. at most operating points the fan system efficiency is much lower than the optimal point, and to achieve full fan system pressure, the fan system diameter or hub ratio will be larger than the optimal state and the drive power will also increase much.
At present, in the industries of ventilation, wind tunnel, environmental test, high altitude simulation, electric power and the like, particularly belonging to ventilation equipment, a fan system with a fixed installation angle can only be singly or/and compromises to adapt to a certain working condition point or a plurality of working condition points, and the performance characteristics of the fan cannot be well utilized.
Disclosure of Invention
The purpose of the invention is as follows: the automatic variable-pitch blade device of the axial flow fan is provided, so that the blade device can work in the state of the maximum fan efficiency better, and the energy consumption and vibration of a fan system are improved. Avoiding the introduction of more auxiliary measures to achieve the same functionality.
The technical scheme is as follows:
an automatic pitch blade device of an axial flow fan, comprising: the adjusting device comprises an axial guide ring 11, an adjusting electric cylinder 12, a plurality of connecting rods 14 corresponding to the number of blades, an end cover 16, an adjusting sleeve compression nut 17, an adjusting sleeve 18, a rotating bearing 24 and an adjusting sleeve distance sleeve 25, wherein the annular axial guide ring 11 is sleeved with an inner ring of a hub 10 and is relatively fixed through a rectangular guide key 20, and the adjusting sleeve 18 penetrates through the axial guide ring 11 and then is connected with the output end of the adjusting electric cylinder 12; an inner ring of the rotating bearing 24 is connected with the outer side of the adjusting sleeve 18, an outer ring of the rotating bearing 24 is connected with a middle sleeve of the axial guide ring 11, so that the separation of the rotational freedom degree of the axial guide ring 11 and the adjusting electric cylinder 12 is realized, one end of the middle sleeve of the axial guide ring 11 is provided with a limiting ring, and the other end of the middle sleeve of the axial guide ring 11 is connected with the end cover 16 and used for axially limiting the outer ring of the rotating bearing 24; the adjusting sleeve distance sleeve 25 and the adjusting sleeve compression nut 17 are sequentially sleeved at the end part of the adjusting sleeve 18 and used for axially limiting the inner ring of the rotating bearing 24; the connecting rod 14 is axially arranged, one end of the connecting rod 14 is hinged to the outer side of the axial guide ring 11, the other end of the connecting rod 14 is hinged to a mounting shaft at the root of the blade 9, the mounting shaft at the root of the blade 9 is connected with a blade mounting shaft sleeve of the hub 10 through a blade shaft rotating bearing 22 and a blade shaft adjusting nut 23, during adjustment, the adjusting electric cylinder 12 drives the axial guide ring 11, and the axial guide ring 11 drives the blade 9 to rotate around a rotating shaft of the axial guide ring 11 through the connecting rod 14.
Further, the connection hinge 15 is a spherical connection hinge.
Further, the adjusting sleeve compression nut 17 is a hexagonal adjusting sleeve compression nut.
Further, the adjustment sleeve 18 is a tubular coupling sleeve.
Furthermore, the driving end of the adjusting electric cylinder 12 adopts servo driving, a displacement sensor 19 is arranged on the adjusting electric cylinder 12 to control axial displacement, and the displacement is fed back to the control end through the displacement sensor 19.
Further, the mounting shaft at the root of the blade 9 is connected with the hub 10 by a shaft sleeve and is locked by a compression nut; the installation epaxial paddle engaging lug 13 that sets up of 9 roots of paddle, paddle engaging lug 13 adopt the axle sleeve to be connected and adopt the key transmission with paddle 9, and paddle engaging lug 13 is fixed through paddle engaging lug set nut 21 with paddle 9.
Further, one end of the connecting rod 14 is hinged to the outer side of the axial guide ring 11 by a spherical connecting hinge 15.
Further, the link 14 is a rectangular or circular link.
Has the beneficial effects that:
the invention relates to an automatic blade adjusting device used in the industries of ventilation, wind tunnel, environmental test, high altitude simulation, electric power and the like. The device can improve the efficiency of the fan, reduce the energy loss of equipment, avoid using motors with higher power to adapt to different working points, reduce the energy consumption, help the fan to work near the optimal working point, avoid introducing more auxiliary measures to realize the same function, and has wide market prospect.
Drawings
FIG. 1 is a schematic view of an axial flow fan assembly;
FIG. 2 is a general schematic view of an automatic pitch blade structure;
FIG. 3 is a schematic view of a structure around a hub in an automatic pitch blade structure;
FIG. 4 is a schematic view of an adjustment portion of an automatic pitch blade configuration;
FIG. 5 is a partial schematic view of an automatic pitch blade structure.
The fan comprises an outer shell 1, a fan tail cover 2, a fan tail support sheet 3, a drive motor 4, guide vanes 5, an impeller 6, a hood 7, a front support sheet 8, blades 9, a hub 10, an axial guide ring 11, an adjusting electric cylinder 12, blade connecting lugs 13, connecting rods 14, connecting hinges 15, an end cover 16, an adjusting sleeve gland nut 17, an adjusting sleeve 18, a displacement sensor 19, a guide key 20, a blade connecting lug positioning nut 21, a blade shaft rotating bearing 22, a blade shaft adjusting nut 23, an adjusting sleeve connecting rotating bearing 24 and an adjusting sleeve spacing sleeve 25.
Detailed Description
The invention discloses an automatic variable-pitch blade device of an axial flow fan, which is used in the industries of ventilation, wind tunnel, environmental test, high-altitude simulation, electric power and the like. The device can improve the efficiency of the fan, reduce the energy loss of equipment, avoid using different working condition points of a motor with higher power, reduce the energy consumption and help the fan to work near the optimal working condition point.
The invention relates to an automatic variable-pitch blade device (shown in figures 1-5) of an axial flow fan used in the industries of ventilation, wind tunnel, environmental test, high altitude simulation, electric power and the like, which is of a set of circular ring-shaped structure and comprises a circular outer shell 1, a fan tail cover 2 of a rotary ring taking an airfoil streamline as a bus, a tail support sheet 3 taking the airfoil of an aircraft wing as a profile, a driving motor 4 in a circular or rectangular shape, a guide blade 5 taking the airfoil of the aircraft wing as the profile, an impeller 6 consisting of a blade 9 taking the airfoil of the aircraft wing as the profile and a circular hub 10, a head cover 7 of the rotary ring taking the airfoil streamline as the bus, a front support sheet 8 taking the airfoil of the aircraft wing as the profile, a circular axial guide ring 11 for supporting and transmitting force, a rectangular or circular adjusting electric cylinder 12, a rectangular blade connecting lug 13, a rectangular or circular connecting rod 14, a spherical connecting hinge 15, an end cover 16, a hexagonal adjusting sleeve compression nut 17, an adjusting sleeve (a tubular connecting sleeve) 18, a displacement sensor 19, a rectangular guide key 20, a blade connecting lug positioning nut 21, a blade shaft rotating bearing 22, a blade shaft adjusting nut 23, a blade shaft adjusting nut 24, an adjusting sleeve connecting sleeve 25, an adjusting sleeve 25 and an adjusting sleeve bearing assembly 25 and the like. The impeller 6 consists of blades 9 and a hub 10. The outer shell 1 is welded with the tail support sheet 3, the guide vane 5 and the front support sheet 8 into a whole, the fan tail cover 2 is welded with the tail support sheet 3 and the guide vane 5 into a whole, and the head cover 7 is welded with the front support sheet 8 into a whole. The driving motor 4 is connected to the fan tail cover 2 through a bolt, and the impeller 6 is installed at the output shaft end of the driving motor 4 through a connecting shaft and is fastened by a tensioning sleeve. The installation axle of paddle 9 root is connected with hub 10's adoption axle sleeve to locking with gland nut, wherein the installation axle of paddle 9 root is connected with paddle engaging lug 13 adoption axle sleeve. The installation axle of paddle 9 root and paddle engaging lug 13 adopt key transmission, avoid the relative rotation to appear in the two.
In order to realize the automatic adjustment function of all the blades, blade connecting lugs 13 are required to be arranged on the impeller 6. The paddle connecting lug 13 and the paddle 9 are connected and assembled into a whole through keys and are fixed through a positioning nut 21 of the paddle connecting lug, and the fixed paddle connecting lug 13 and the fixed paddle 9 do not have any relative movement. The blade attachment lug 13 is then connected to the axial guide ring 11 via a connecting rod 14 and a connecting joint 15. When the axial guide ring 11 moves axially, the connecting rod 14 and the connecting hinge 15 can drive the paddle 9 to rotate. Meanwhile, in order to realize that the blade installation angle is unchanged when the adjusting electric cylinder 12 stops in the movement process, the axial guide ring 11 is in key connection with the hub 10 through the guide key 20, the connected axial guide ring 11 does not rotate relative to the hub 10, but the adjusting electric cylinder 12 can drive the axial guide ring 11 to realize the adjustment of the blade installation angle. Finally, when the adjusting electric cylinder 12 drives the axial guide ring 11, the electric cylinder cannot rotate, so the adjusting sleeve is connected with the rotating bearing 24 to separate the rotational degrees of freedom of the adjusting sleeve and the rotating bearing, and the connecting shaft sleeve 18, the adjusting sleeve distance sleeve 25, the end cover 16 and the adjusting sleeve compression nut 17 jointly form a set of axial driving adjusting mechanism. In order to realize accurate adjustment of the installation angle of the blade 9, a servo drive is adopted at the drive end of the adjusting electric cylinder 12, and a displacement sensor 19 is arranged to control the axial displacement and feed the axial displacement back to the control end.
Automatic blade changing principle: the adjusting electric cylinder 12 drives the axial guide ring 11, and the axial guide ring 11 drives the paddle 9 to rotate around the rotating shaft of the paddle through the connecting rod 14 and the connecting hinge 15. Meanwhile, the axial guide ring 11 and the hub 10 do not rotate relatively, and when the adjustment electric cylinder 12 drives the axial guide ring 11, the rotation of the electric cylinder cannot occur, so that the adjustment sleeve is required to be connected with the rotating bearing 24 to separate the rotational freedom degrees of the adjustment sleeve and the rotating bearing, and the adjustment sleeve 18, the adjustment sleeve distance sleeve 25, the end cover 16 and the adjustment sleeve compression nut 17 form a set of axial driving adjustment mechanism. In order to realize accurate adjustment of the installation angle of the blade 9, a servo drive is adopted at the drive end of the adjusting electric cylinder 12, and a displacement sensor 19 is arranged to control the axial displacement and feed the axial displacement back to the control end.
In ventilation, wind tunnel, environmental test, high altitude simulation, electric power simulation, through setting up the paddle into automatic variable oar device, at required operating mode point, the erection angle of automatically regulated paddle to the corresponding operating mode point of adaptation, the fan speed of readjustment corresponding operating mode point enables fan system all to work at the highest efficiency point at every operating mode point, thereby effectual reduction fan energy consumption and rotational speed reduce fan system's vibration. The basic principle of the automatic variable propeller device is that a connecting rod connected with a sliding key is added on a connecting shaft at the root of each blade, the connecting shaft and the connecting rod connected with the sliding key do not move or move in relative positions, an axial guide ring which can move relatively along the axial direction and does not rotate relatively around the axial direction is arranged on the inlet side of a propeller hub, and the connecting rod at the root of each blade is connected with the axial guide ring through one connecting rod, so that the linkage of one axial guide ring and all blades is formed. The head end of the axial guide ring is driven by the servo driving motor to move axially, and then the blade is driven to rotate around the installation shaft at the root of the blade, so that the installation angle of the blade is adjusted.
By adopting the automatic variable-pitch blade device, the mounting angle of the blade can be adjusted in real time according to the working condition points, and different fan rotating speeds are adapted, so that the fan works at the optimal or maximum working efficiency under each working condition, and the problems of low overall efficiency of the fan and the like are well solved.
Claims (8)
1. The utility model provides an automatic change oar leaf device of axial fan which characterized in that includes: the adjusting device comprises an axial guide ring (11), an adjusting electric cylinder (12), a plurality of connecting rods (14) corresponding to the number of blades, an end cover (16), an adjusting sleeve compression nut (17), an adjusting sleeve (18), a rotating bearing (24) and an adjusting sleeve distance sleeve (25), wherein the annular axial guide ring (11) is sleeved with an inner ring of a hub (10) and is relatively fixed through a rectangular guide key (20), and the adjusting sleeve (18) penetrates through the axial guide ring (11) and then is connected with the output end of the adjusting electric cylinder (12); an inner ring of the rotating bearing (24) is connected with the outer side of the adjusting sleeve (18), an outer ring of the rotating bearing (24) is connected with a middle sleeve of the axial guide ring (11) to realize the separation of the axial guide ring (11) and the adjusting electric cylinder (12) in terms of rotational freedom, one end of the middle sleeve of the axial guide ring (11) is provided with a limiting ring, and the other end of the middle sleeve of the axial guide ring (11) is connected with an end cover (16) and used for axially limiting the outer ring of the rotating bearing (24); an adjusting sleeve distance sleeve (25) and an adjusting sleeve compression nut (17) are sequentially sleeved at the end part of the adjusting sleeve (18) and used for axially limiting the inner ring of the rotating bearing (24); the connecting rod (14) is axially arranged, one end of the connecting rod (14) is hinged to the outer side of the axial guide ring (11), the other end of the connecting rod (14) is hinged to a mounting shaft at the root of the blade (9), a mounting shaft at the root of the blade (9) is connected with a blade mounting shaft sleeve of the hub (10) through a blade shaft rotating bearing (22) and a blade shaft adjusting nut (23), during adjustment, the adjusting electric cylinder (12) drives the axial guide ring (11), and the axial guide ring (11) drives the blade (9) to rotate around a rotating shaft of the axial guide ring (11) through the connecting rod (14).
2. Automatic pitch blade arrangement according to claim 1, wherein the connection hinge (15) is a spherical connection hinge.
3. The automatic pitch blade device according to claim 1, wherein the adjusting sleeve gland nut (17) is a hexagonal adjusting sleeve gland nut.
4. Automatic pitch blade arrangement according to claim 1, wherein the adjustment sleeve (18) is a tubular connection sleeve.
5. The automatic pitch blade device according to claim 1, characterized in that the driving end of the adjusting electric cylinder (12) adopts servo driving, a displacement sensor (19) is arranged on the adjusting electric cylinder (12) to control axial displacement, and the displacement is fed back to the control end through the displacement sensor (19).
6. The automatic pitch blade device according to claim 1, characterized in that the mounting shaft of the root of the blade (9) is connected with the hub (10) by a shaft sleeve and locked by a compression nut; the installation epaxial setting of paddle (9) root paddle engaging lug (13), paddle engaging lug (13) adopt the axle sleeve to be connected and adopt the key transmission with paddle (9), and paddle engaging lug (13) are fixed through paddle engaging lug set nut (21) with paddle (9).
7. The automatic pitch blade arrangement according to claim 2, wherein one end of the connecting rod (14) is hinged to the outside of the axial guide ring (11) by means of a spherical connecting hinge (15).
8. The automatic pitch blade arrangement according to claim 1, wherein the connecting rod (14) is a rectangular or circular connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211134213.4A CN115419612A (en) | 2022-09-16 | 2022-09-16 | Automatic variable-pitch blade device of axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211134213.4A CN115419612A (en) | 2022-09-16 | 2022-09-16 | Automatic variable-pitch blade device of axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115419612A true CN115419612A (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211134213.4A Pending CN115419612A (en) | 2022-09-16 | 2022-09-16 | Automatic variable-pitch blade device of axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115419612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576152A (en) * | 2023-07-12 | 2023-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
-
2022
- 2022-09-16 CN CN202211134213.4A patent/CN115419612A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576152A (en) * | 2023-07-12 | 2023-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
| CN116576152B (en) * | 2023-07-12 | 2023-09-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel fan blade fixing device and wind tunnel fan with adjustable blade mounting angle |
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