CN107313967B - Axial flow fan with adjustable counter-rotating movable blades - Google Patents
Axial flow fan with adjustable counter-rotating movable blades Download PDFInfo
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- CN107313967B CN107313967B CN201710569734.5A CN201710569734A CN107313967B CN 107313967 B CN107313967 B CN 107313967B CN 201710569734 A CN201710569734 A CN 201710569734A CN 107313967 B CN107313967 B CN 107313967B
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- 238000009792 diffusion process Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 21
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- 230000000712 assembly Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 3
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- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 abstract description 9
- 230000001276 controlling effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000013178 mathematical model Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
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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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/163—Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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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
Abstract
The invention relates to the technical field of fans, in particular to a rotary movable blade adjustable axial flow fan which comprises two fan units which have the same structure and are connected with each other; the fan unit comprises an inner cylinder, an impeller assembly, a diffusion cylinder, an adjusting mechanism and a motor; wherein, the inner cylinder is connected with the impeller component and the diffusion cylinder in sequence; the adjusting mechanism is arranged inside the inner cylinder and connected with the impeller assembly for adjusting the impeller assembly; the motor is arranged inside the diffusion cylinder and is connected with the impeller assembly and the adjusting mechanism. The ventilation air flows in from the flow channel formed by the diffusion cylinder and the outer cylinder of one fan unit, flows out from the flow channel formed by the inner cylinder and the outer cylinder through the impeller assembly, flows in from the flow channel formed by the inner cylinder and the outer cylinder in the other fan unit, and flows out from the flow channel formed by the impeller assembly, the diffusion cylinder and the outer cylinder. The air quantity is large, the pressure is high, the structure is compact, 100% of reverse air supply can be realized, and the blade angle in the running state is regulated by the regulating mechanism, so that the purpose of changing the running parameters of the fan is achieved.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a rotary blade adjustable axial flow fan.
Background
According to the statistics of related data, the power consumption of the pump and the fan load is about more than half of the total national power generation, which is caused by two factors, on one hand, the pump and the fan equipment are very widely applied, particularly, the fan is used in all links of national economy, and the energy consumption is natural; on the other hand, the performances of the pump and the fan are related to the pipeline characteristics, the performances (flow, pressure, power consumption and the like) of the pump and the fan equipment are changed along with the change of the pipeline resistance, the efficiency and the flow are changed in a parabolic rule under the condition of fixed parameters such as blade angle, rotating speed and the like, a highest efficiency point is arranged near a design point, and the efficiency of the highest efficiency point is usually between 60% and 80%, but in practical application, for various reasons, the pump and the fan equipment are all the more and the ninth to work at the off design point, the more the off is, the efficiency of the equipment is lower, so that the improvement of the practical operation efficiency of the fan equipment has practical significance for energy conservation and emission reduction.
The operation efficiency of the fan is improved, the energy consumption of the fan is reduced, and two paths are provided, 1, the efficiency of the fan is improved, or the high-efficiency area range of the operation of the fan is enlarged; 2. and the matching performance of the fan and the pipeline is optimized, so that the fan works near the design point.
Currently, countries are implementing a level-down policy for ventilators, and if this policy is met, the highest efficiency of ventilators in the market is basically outweighed. Like this kind of fan that performance is good, want to improve two percentage points on the original basis all very difficult again, if want to improve the actual operating efficiency of fan through the method that expands its high-efficient area scope, make fan efficiency-air volume curve flat point, its improvement potentiality is two three percentage points's possibility. The use of the first path is costly but has limited effectiveness.
On the problem of optimizing the matching of the fan and the pipeline performance, due to more influencing factors, the fan rarely runs in a high-efficiency area in actual use. First, more than 70% of ventilators currently on the market have their actual performance not consistent with the performance of the signage, and the signage parameters are not necessarily design point parameters. And thirdly, the ventilation engineer is willing to select a large power point of the fan and is not willing to risk insufficient ventilation quantity caused by insufficient fan pressure, the actual performance of most ventilators cannot reach the sign performance, the ventilation engineer greatly increases the ventilation quantity pressure of the ventilators, the second pipeline installation constructor is convenient, the pipeline manufacturing is deviated from the engineering design, and the third resistance of a plurality of pipelines is changed along with the time. In the above-mentioned circumstances, even if the blower itself is a high-efficiency blower, the actual efficiency thereof is not necessarily high in use, and even if the initial stage of installation is high, the long-term high-efficiency operation cannot be ensured after a certain period of operation.
Disclosure of Invention
Aiming at the defects existing in the problems, the invention provides a rotary blade adjustable axial flow fan.
In order to achieve the above object, the present invention provides a rotary blade adjustable axial flow fan, comprising: two fan units which have the same structure and are connected with each other;
the fan unit comprises an inner cylinder, an impeller assembly, a diffusion cylinder, an adjusting mechanism and a motor; wherein,
the inner cylinder is sequentially connected with the impeller assembly and the diffusion cylinder; the adjusting mechanism is arranged inside the inner cylinder and connected with the impeller assembly for adjusting the impeller assembly; the motor is arranged inside the diffusion cylinder and is connected with the impeller assembly and the adjusting mechanism.
The two fan units are connected in series in the axial direction.
The axial flow fan with the adjustable rotating blades further comprises an outer barrel arranged outside the fan unit.
The impeller assembly comprises a plurality of blade assemblies and a hub, wherein a plurality of mounting holes are uniformly formed in the circumference of the hub, and the blade assemblies are respectively arranged in the mounting holes.
The rotating direction of the impeller assemblies is opposite to that of the rotating direction of the rotating impeller adjustable axial flow fan.
The blade assembly comprises a blade, two bearings, a blade handle shifting fork and a compression nut; wherein,
the shaft sealing cover, the two bearings, the petiole shifting fork and the compression nut are sequentially sleeved on the petiole at one end of the blade.
In the axial flow fan with the adjustable rotary blades, the felt sealing ring is arranged between the shaft sealing cover and the bearing.
The adjusting mechanism comprises an adjusting sliding block assembly, an adjusting push rod and an actuator; wherein,
the adjusting slide block assembly is connected with the leaf handle shifting fork, and the adjusting slide block assembly is connected with the actuator through the adjusting push rod.
According to the axial flow fan with the adjustable rotary blades, the outer wall of the diffusion cylinder is uniformly provided with the plurality of supporting pieces.
In the axial flow fan with the adjustable rotary blades, the diffusion cylinder is in a reduced shape.
In the technical scheme, compared with the prior art, the axial flow fan with the adjustable rotating blades has the advantages that air flows in from the flow channel formed by the diffusion cylinder and the outer cylinder of one fan unit, flows out from the flow channel formed by the inner cylinder and the outer cylinder through the impeller assembly, flows in from the flow channel formed by the inner cylinder and the outer cylinder in the other fan unit, and flows out from the flow channel formed by the impeller assembly, the diffusion cylinder and the outer cylinder. The front impeller and the rear impeller are opposite in rotation direction, have the advantages of large air quantity, high pressure, compact structure and capability of realizing 100% reverse air supply, and are suitable for places with small space and large complex resistance of pipelines at present, such as tunnel mine ventilation. The blade angle in the running state is regulated by the regulating mechanism, so that the purpose of changing the running parameters of the fan is achieved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a rotary blade adjustable axial flow fan according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a fan unit structure of a rotary blade adjustable axial flow fan according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an impeller rotating assembly and an adjusting mechanism of a rotary blade adjustable axial flow fan according to an embodiment of the present application.
Fig. 4 is a schematic structural view of a hub of a rotary blade adjustable axial flow fan according to an embodiment of the present application.
FIG. 5 is a schematic view of a blade assembly of a rotary blade adjustable axial flow fan in an embodiment of the present application.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the pair of rotary blade adjustable axial flow fans are schematically shown and comprise two fan units which have the same structure and are connected, wherein the two fan units are two mutually independent fan units (which can be called a primary axial flow fan and a secondary axial flow fan) and are axially connected in series.
Each fan unit comprises an inner cylinder 5, an impeller assembly 3, a diffusion cylinder 2, an adjusting mechanism 6 and a motor 1; wherein, inner tube 5 and impeller subassembly 3, diffusion section of thick bamboo 2 connect gradually. An adjusting mechanism 6 is arranged inside the inner cylinder 5 and connected with the impeller assembly 3 for adjusting the impeller assembly 3. The motor 1 is arranged inside the diffusion cylinder 2 and is connected with the impeller assembly 3 and the adjusting mechanism 6. The impeller assembly 3 is dynamically adjustable in the angle of the impeller. The fan unit also comprises an outer barrel 4 arranged outside the fan unit, wherein the outer barrel 4 wraps the circumference of the fan unit completely, and the fan unit works inside the outer barrel 4.
Specifically, the two outer cylinders 4 are connected through an interface flange to enable the two fan units to form a whole, and the two fan units are arranged in a plane mirror image mode. The air flow direction of the two fan units is kept consistent, but the rotation direction of the impeller rotating assembly 3 is opposite. The air flow flows in from a flow channel formed by the diffusion cylinder 2 and the outer cylinder 4 of one fan unit, and flows out from a flow channel formed by the inner cylinder 5 and the outer cylinder 4 through the impeller assembly 3. In the other fan unit, a flow channel formed by the inner cylinder 5 and the outer cylinder 4 flows in and flows out through a flow channel formed by the impeller assembly 3, the diffusion cylinder 2 and the outer cylinder 4. The structure can realize 100% performance reverse air supply by changing the rotation direction of the motors of the two fan units, and the roles of the two fan units are mutually converted when the reverse air supply works.
Further, the impeller assembly 3 with dynamically adjustable angles of the movable vanes is fixed on the shaft of the driving motor 1, the motor 1 is arranged inside the diffusion barrel 2, the diffusion barrel 2 is fixed on the inner arm of the outer barrel 5 through a plurality of radially distributed supporting pieces 21, and the diffusion barrel 2 is in a reduced shape.
Disrotatory axial fan: the counter-rotating axial flow fan is a two-stage impeller axial flow fan, one fan is composed of a front impeller and a rear impeller, the rotation directions of the front impeller and the rear impeller are opposite, and the counter-rotating axial flow fan has the advantages of large air quantity, high pressure, compact structure, capability of realizing 100% reverse air supply and the like, and is suitable for places with small space and large complex resistance of pipelines at present, such as ventilation of tunnel mines and the like.
Axial fan with dynamically adjustable movable blade angle: the fan adjusts the installation angle of the fan rotating blade through the adjusting mechanism under the running condition so as to achieve the purpose of changing the running parameters of the fan, and the axial flow fan with the function is called a dynamic adjustable-blade-angle axial flow fan, and is called a movable-blade adjustable-blade axial flow fan for short.
The executing mechanism comprises: the actuator uses a liquid, gas, electric or other energy source and converts it into a driving action by means of an electric motor, cylinder or other device. In this example, the motor is used as power, and the change of the blade angle is driven by a set of special transmission system.
As shown in fig. 3 and 4, in one embodiment, the impeller assembly 3 includes a plurality of vane assemblies 31 and a hub 32, and a plurality of mounting holes 321 are uniformly formed on the circumference of the hub 32, and the plurality of vane assemblies 31 are respectively mounted in the plurality of mounting holes 321. A felt seal 316 is mounted between the shaft seal cap 315 and the bearing 312. The blade angle adjusting slider on the other side of the hub 32 is coupled to the actuator 63 by a bearing, a universal coupling. As shown in fig. 3, the adjusting mechanism 6 includes an adjusting slider assembly 61, an adjusting push rod 62 and an actuator 63, and specifically, the adjusting slider assembly 61 is connected to a stem fork 313, and the adjusting slider assembly 61 is connected to the actuator 63 through the adjusting push rod 62.
Each blade assembly 31 is composed of a blade 311, two bearings 312 capable of bearing axial thrust, a bearing cover 315, a shank fork 313 and a compression nut 314. One end of each blade 311 is provided with a cylindrical blade handle, the tail end of each blade handle is provided with threads, the blade handle is sequentially provided with a bearing sealing cover 315, two bearings 312 capable of bearing axial thrust force, a blade handle shifting fork 313 and a compression nut 314, the blade 311 is fixed on a blade mounting hole 321 of the hub 32 through the two bearings 312, and the blade handle is axially fixed by the compression nut 314. The shaft sealing cover 315 is fixed on the hub 32 through a screw, a sealing gasket is padded on a composite surface of the shaft sealing cover 315 and the blade handle, a coaxial relation is kept between the shaft sealing cover 315 and the blade handle, a felt sealing ring 316 is arranged between the shaft sealing cover 315 and the blade handle, grease leakage of the bearing 312 is prevented, a key connection is arranged between the blade handle shifting fork 313 and the blade handle, and the blade 311 can flexibly rotate along with the blade handle shifting fork 313 on the hub 32. The stigmas of the blade stem shifting fork 313 of all the blade assemblies 31 are clamped by the external circular grooves of the adjusting slide block assembly 61, which are not shown in the clamping sleeve drawing, and the stigmas of the blade stem shifting fork 313, the clamping sleeve and the external circular grooves of the adjusting slide block assembly 61 are connected by sliding pairs. The adjusting slide block assembly 61 is arranged on the outer circle of the hub 32 sleeve and is coaxial with the hub 32, and the adjusting slide block assembly 61 is connected with the outer circle of the hub sleeve through the slide block key 7, so that the circumferential synchronization is ensured, and the adjusting slide block assembly can freely slide in the axial direction. The side of the adjusting slide block assembly 61 away from the hub 32 is connected with a push rod assembly 62, the push rod assembly 62 is connected with the adjusting slide block assembly 61 through a bearing group 8 capable of bearing axial force, the push rod assembly can be prevented from rotating when the adjusting slide block assembly 61 rotates, and the push rod assembly can transmit axial adjusting force to the adjusting slide block assembly 61. The pushrod assembly 62 is coupled to the actuator 63 via a pair of universal couplings 64. When the adjusting actuator 63 acts, the adjusting slide block assembly 61 moves along with the push rod assembly to generate axial displacement, the blade 311 is changed in angle by the blade stem shifting fork 313 driven by the adjusting slide block assembly 61, and the rotating direction is in relatively dynamic and static contact due to the fact that the adjusting slide block assembly 61 is connected with the push rod assembly 62 through the bearing group 8, and therefore the angle of the blade 311 can be dynamically adjusted when the impeller assembly 3 rotates to work.
As shown in FIG. 5, in one embodiment, the blade assembly 31 includes a blade 311, two bearings 312, a shank fork 313, and a compression nut 314; the shaft sealing cover 315, two bearings 312, a blade stem shifting fork 313 and a compression nut 314 are sequentially sleeved on the blade stem at one end of the blade 311.
The hydrodynamics theory shows that the resistance of the ventilating duct rises in a quadratic relation with the increase of the air quantity in the duct. The air supply quantity of the fan can be reduced due to the increase of the pipeline resistance, different fans can show different P-Q curves, the fan with a fixed working state runs in a pipeline with fixed resistance, the performance state of the fan is also fixed, and the working point of the fan is the intersection point of the two curves. That is to say, the operating point of the same fan is determined by an external pipelineIf the fan is reasonably matched with the pipeline, the fan runs near the highest efficiency point, the running efficiency of the fan is high, and otherwise, the running efficiency of the fan is low. Also, for the same ventilation line, 10000m is required to be delivered 3 The air quantity per hour is 1000Pa, and if the fan is good, such as fan A, the total resistance loss of the pipeline is 10000m 3 The efficiency at/h is 80% of its maximum efficiency, where fan A only requires 3.47kW of power consumption, if fan B is not good, e.g., at 10000m 3 The efficiency at the air volume per hour is only 50%, and the fan B needs 5.56kW of power consumption. However, in field use, it is difficult to bring the operating point of the fan to the vicinity of the highest efficiency point for various reasons, which tends to cause unnecessary waste of additional electric power.
The counter-rotating axial flow fan has a plurality of advantages, the counter-rotating axial flow fan is designed to have the advantages of adjusting the blade angles of the two-stage impeller and the working conditions which are not compared with other types of fans, the counter-rotating axial flow fan can work at the highest efficiency or near the highest efficiency in the whole air volume range through the known energy control of the counter-rotating axial flow fan, the waste of extra energy sources is avoided, and if the counter-rotating axial flow fan is popularized by the counter-rotating axial flow fan, the saving of 1 layer of total power generation of the whole country is completely possible.
The specific use is as follows:
1) The measurement of atmospheric pressure and air temperature can be ignored in the occasion with lower control precision requirement;
2) The power supply frequency of the monitoring driving motor can be used for replacing the monitoring impeller rotating speed in the occasion with lower control precision requirement;
3) The invention adopts a neural network technology self-learning modeling method to generate the fan performance mathematical model, and can also adopt a fitting method to generate the fan performance mathematical model.
4) The invention adopts a singlechip to control the fan, and can also adopt a PLC (programmable logic controller) to realize the same function.
5) The invention adopts learning software to automatically generate the fan performance mathematical model on the standard test bed, and also can adopt a manual test mode to generate the fan performance mathematical model by adopting a manual method.
6) The invention adopts the pressure state parameter at the inlet and outlet sections of the blower to indirectly determine the performance parameter of the blower, and can also directly measure the air quantity and the pressure in the ventilation pipeline to determine the performance parameter of the blower, thereby achieving the purpose of intelligent control;
7) In the invention, two sets of frequency conversion circuits are adopted to control the driving motors of the primary impeller and the secondary impeller respectively, and in order to simplify a control algorithm, one set of frequency conversion circuit with larger power capacity can be adopted to drag the two driving motors;
8) The invention adopts a specially designed frequency conversion circuit to provide the speed regulation of the driving motor, and can also replace the frequency conversion circuit by a universal frequency converter;
9) As a special example, the scheme can also intelligently control the disrotatory axial flow fan with the fixed blade angle, the regulating and controlling parameters of the scheme are that the rotating speeds and the blade angles of the primary impeller and the secondary impeller are four, and the blade angles of the primary impeller and the secondary impeller of the disrotatory axial flow fan with the fixed blade angle are fixed values, and the fan performance is regulated only through regulating and controlling the rotating speeds of the primary impeller and the secondary impeller when the scheme is used for controlling;
10 As an example, the scheme can also intelligently control the rotating vane adjustable axial flow fan with fixed rotating speed, the regulating and controlling parameters of the scheme are that the rotating speed and the blade angle of the first-stage impeller and the second-stage impeller are four, and the rotating speed of the first-stage impeller and the second-stage impeller of the rotating vane adjustable axial flow fan with fixed rotating speed are fixed values, and the fan performance is regulated only by regulating and controlling the blade angle of the first-stage impeller and the second-stage impeller when the scheme is used for controlling;
11 As an example, the scheme can also intelligently control the common movable blade adjustable axial flow fan, the regulation object of the scheme is a counter-rotating movable blade adjustable axial flow fan, and for the common movable blade adjustable axial flow fan, only one impeller stage can regulate the fan performance through regulating the rotating speed and the blade angle of the impeller;
12 As an example, the scheme can also intelligently control the common movable blade adjustable axial flow fan with fixed rotating speed, the regulation object of the scheme is the opposite rotating movable blade adjustable axial flow fan, and the fan performance of the common movable blade adjustable axial flow fan with fixed rotating speed is regulated by only one impeller stage through regulating and controlling the blade angle.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (8)
1. A rotary blade adjustable axial flow fan comprising: two fan units which have the same structure and are connected with each other;
the fan unit comprises an inner cylinder (5), an impeller assembly (3), a diffusion cylinder (2), an adjusting mechanism (6) and a motor (1); wherein,
the inner cylinder (5), the impeller assembly (3) and the diffusion cylinder (2) are sequentially connected; the adjusting mechanism (6) is arranged inside the inner cylinder (5) and is connected with the impeller assembly (3) to adjust the impeller assembly (3), the adjusting mechanism (6) comprises an adjusting slide block assembly (61), an adjusting push rod (62) and an actuator (63), and the actuator (63) is used for providing driving force;
the adjusting mechanism (6) can dynamically adjust the angle of the impeller assembly (3) when the impeller assembly (3) rotates to work, and the motor (1) is arranged inside the diffusion cylinder (2) and is connected with the impeller assembly (3) and the adjusting mechanism (6);
the impeller assembly (3) comprises a plurality of blade assemblies (31) and a hub (32), wherein a plurality of mounting holes (321) are uniformly formed in the circumference of the hub (32), and the plurality of blade assemblies (31) are respectively arranged in the plurality of mounting holes (321);
the blade assembly (31) comprises a blade (311), two bearings (312), a blade stem fork (313) and a compression nut (314); wherein,
a shaft sealing cover (315), two bearings (312), a petiole shifting fork (313) and a compression nut (314) are sequentially sleeved on a petiole at one end of the blade (311);
the blade (311) can flexibly rotate along with the blade stem shifting fork (313) on the hub (32); the cylindrical heads of the petiole shifting forks (313) of all the blade assemblies (31) are clamped by the outer circular grooves of the adjusting slide block assemblies (61) through jackets, and sliding pairs are connected among the cylindrical heads of the petiole shifting forks (313), the jackets and the outer circular grooves of the adjusting slide block assemblies (61); the adjusting slide block assembly is arranged on the outer circle of the shaft sleeve of the wheel hub (32) and is coaxial with the wheel hub (32), and the adjusting slide block assembly (61) is connected with the outer circle of the shaft sleeve of the wheel hub (32) through a slide block key (7) to ensure the synchronization in the circumferential direction, but can freely slide in the axial direction; one side of the adjusting slide block assembly (61) away from the hub (32) is connected with a push rod assembly (62), the push rod assembly (62) is connected with the adjusting slide block assembly (61) through a bearing group (8) capable of bearing axial force, the push rod assembly can be prevented from rotating when the adjusting slide block assembly (61) rotates, and the push rod assembly can transmit axial adjusting force to the adjusting slide block assembly (61); the pushrod assembly (62) is coupled to an actuator (63) by a pair of universal couplings (64); when the actuator (63) is regulated to act, the regulating slide block assembly (61) follows the push rod assembly (62) to generate axial displacement, the blade stem shifting fork (313) is driven by the regulating slide block assembly (61) to enable the blade (311) to change in angle, and the rotating direction is relatively in dynamic and static contact due to the fact that the regulating slide block assembly (61) is connected with the push rod assembly (62) through the bearing group (8), and therefore the angle of the blade (311) can be dynamically regulated when the impeller assembly (3) rotates to work.
2. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: the two fan units are axially connected in series.
3. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: the air conditioner further comprises an outer cylinder (4) arranged outside the fan unit.
4. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: the rotation directions of the two impeller assemblies (3) are opposite.
5. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: a seal ring (316) is mounted between the shaft seal cover (315) and the bearing (312).
6. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: the adjusting slide block assembly (61) is connected with the petiole shifting fork (313), and the adjusting slide block assembly (61) is connected with the actuator (63) through the adjusting push rod (62).
7. The counter-rotating bucket adjustable axial flow fan of claim 1, wherein: a plurality of supporting sheets (21) are uniformly arranged on the outer wall of the diffusion cylinder (2).
8. The counter-rotating bucket adjustable axial flow fan of claim 7, wherein: the diffusion cylinder (2) is in a reduced shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569734.5A CN107313967B (en) | 2017-07-13 | 2017-07-13 | Axial flow fan with adjustable counter-rotating movable blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569734.5A CN107313967B (en) | 2017-07-13 | 2017-07-13 | Axial flow fan with adjustable counter-rotating movable blades |
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| Publication Number | Publication Date |
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| CN107313967A CN107313967A (en) | 2017-11-03 |
| CN107313967B true CN107313967B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710569734.5A Active CN107313967B (en) | 2017-07-13 | 2017-07-13 | Axial flow fan with adjustable counter-rotating movable blades |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109185190B (en) * | 2018-09-25 | 2020-11-27 | 西迪技术股份有限公司 | Counter-rotating fan and axial power matching method thereof |
| CN111350531B (en) * | 2020-03-18 | 2023-10-27 | 重庆交通建设(集团)有限责任公司 | Surge positive and negative airflow impact type dust removal system suitable for high smoke tunnel construction |
| CN113217417B (en) * | 2021-04-25 | 2022-04-29 | 仨亿电器股份有限公司 | Range-adjustable axial flow fan |
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| CN205478543U (en) * | 2016-02-01 | 2016-08-17 | 石家庄红叶风机有限公司 | Synchronous angle modulation wheel hub of fan blade |
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| DE102007011990B4 (en) * | 2007-03-09 | 2019-01-10 | Tlt-Turbo Gmbh | Device for the hydraulic adjustment of the blades of an impeller of an axial fan |
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| CN107313967A (en) | 2017-11-03 |
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