Double-fan power mechanism and double-fan duct system

Abstract

The invention belongs to the technical field of equipment manufacturing, and relates to a double-fan power mechanism and a double-fan duct system. The double-fan power mechanism is of a coaxial double-fan structure, based on a double-fan reverse rotation driving mechanism, efficient power output can be achieved, powerful directional wind power is generated, and the problems that a single fan is weak in wind power and low in efficiency are solved. The double fans are mounted through the three layers of annular racks, so that the power mechanism is firmer, and the overall structure is stable and the safety is improved on the premise of ensuring high-speed rotation of the double fans and improving the wind power efficiency. A wheel-rail circumferential friction transmission mode is adopted, so that the power effect is multiplied; the driving assembly is used for driving the double fans to rotate synchronously and reversely, the torsion of the double fans can be counteracted, the design that other redundancy is specially used for eliminating confronting torsion is not needed, and the mechanism structure is simpler and more reliable. And the axial positioning part and the radial positioning part are matched with a driving wheel in the driving assembly, so that high-precision positioning and mounting of the double fans are realized.

Description

Technical Field

[0001] This invention relates to the field of equipment manufacturing technology, and in particular to a dual-fan power mechanism and a dual-fan duct system. Background Technology

[0002] Traditional fan-powered mechanisms have a single fan as their core power unit. However, a single fan produces low air pressure and weak, insufficiently dispersed airflow, making it difficult to create a concentrated, directional airflow. When such single-fan-powered mechanisms are used in wind tunnels, wind power generation, and aerodynamic aircraft lift rotor systems, they exhibit poor structural stability and low safety. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-fan power mechanism and a dual-fan duct system, which adopts a coaxial dual-fan structure and, based on the dual-fan counter-rotating drive mechanism, can achieve efficient power output and generate strong directional wind force, thereby solving the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: On one hand, the present invention proposes a dual-fan power mechanism, comprising: Hollowed-out frame; A dual-fan assembly includes a first fan and a second fan, both of which are rotatably mounted in the hollow frame. The first fan and the second fan are coaxially arranged, and the blades of the first fan and the second fan rotate in opposite directions. A drive assembly is disposed on the hollow frame, and the drive assembly is used to drive the first fan and the second fan to rotate synchronously and in opposite directions.

[0005] In some embodiments, the blade angle of one of the first and second fans, which is the windward fan, is smaller than the blade angle of the other.

[0006] In some embodiments, the hollow frame includes three layers of ring frame, and each layer of the ring frame includes an inner ring support and an outer ring support fixed to the outer ring of the inner ring support; The three-layer annular frame is coaxial and spaced apart, and any two adjacent layers of the annular frame are connected and fixed by axial support members to form an installation interlayer between each two adjacent layers of the annular frame. The first fan and the second fan are respectively installed in the two mounting layers formed by the three-layer annular frame.

[0007] In some embodiments, the dual-fan power mechanism further includes an axial positioning assembly, the axial positioning assembly comprising: The first fan axial positioning part is disposed on the hollow frame and is in contact with at least one end face of the first fan to position the first fan axially. The second fan axial positioning part is disposed on the hollow frame and is in contact with at least one end face of the second fan to position the second fan axially.

[0008] In some embodiments, the drive assembly is disposed on the middle layer annular frame of the hollow frame and located between the first fan and the second fan; The drive assembly includes a drive gear and a gear drive motor. Both the first fan and the second fan have annular gear rings that mesh with the drive gear on their two adjacent end faces. The gear drive motor drives the drive gear to rotate, which can drive the first fan and the second fan to rotate synchronously and in opposite directions. Alternatively, the drive component is a friction wheel integrating a hub motor, and an annular slide rail is provided on the two adjacent end faces of the first fan and the second fan to engage with the friction wheel in rolling contact; the hub motor drives the friction wheel to rotate, which can drive the first fan and the second fan to rotate synchronously and in opposite directions.

[0009] In some embodiments, the first fan axial positioning part is a first fan axial positioning wheel, which is disposed on the annular frame located outside the first fan; a first annular guide raceway is provided on the end face of the first fan away from the second fan, the first fan axial positioning wheel contacts and engages with the first annular guide raceway, and the first fan axial positioning wheel and the drive assembly respectively axially position the two ends of the first fan. The second fan axial positioning part is a second fan axial positioning wheel, which is disposed on the annular frame located outside the second fan; a second annular guide raceway is provided on the end face of the second fan away from the first fan, the second fan axial positioning wheel contacts and cooperates with the second annular guide raceway, and the second fan axial positioning wheel and the drive assembly respectively axially position the two ends of the second fan.

[0010] In some embodiments, the dual-fan power mechanism further includes a radial positioning assembly, the radial positioning assembly comprising: A first fan radial positioning part is disposed on the hollow frame and located in the inner and / or outer ring of the first fan to radially position the first fan. The second fan radial positioning part is disposed on the hollow frame and located in the inner and / or outer ring of the second fan to radially position the second fan.

[0011] In some embodiments, the first fan radial positioning part is a first fan radial positioning wheel set, the first fan radial positioning wheel set includes a first wheel axle and a first radial positioning wheel rotatably mounted on the first wheel axle, the first wheel axle is fixed on the hollow frame and parallel to the axis of the hollow frame, and the first radial positioning wheel rolls in cooperation with the inner ring and / or outer ring of the first fan; The second fan radial positioning part is a second fan radial positioning wheel set. The second fan radial positioning wheel set includes a second wheel axle and a second radial positioning wheel rotatably mounted on the second wheel axle. The second wheel axle is fixed on the hollow frame and parallel to the axis of the hollow frame. The second radial positioning wheel rolls in cooperation with the inner and / or outer rings of the second fan.

[0012] In some embodiments, the first radial positioning wheel is a friction roller, which makes rolling contact frictional engagement with the inner and / or outer rings of the first fan; the second radial positioning wheel is a friction roller, which makes rolling contact frictional engagement with the inner and / or outer rings of the second fan. Alternatively, the first radial positioning wheel is a positioning pulley with a groove on its outer circumference, and the inner and / or outer ring of the first fan is provided with an annular positioning track that mates with the groove. The annular positioning track is embedded in the groove to provide rolling guidance for the second radial positioning wheel.

[0013] On the other hand, the present invention proposes a dual-fan duct system, including an inner duct, an outer duct, and a dual-fan power mechanism as described in any one of the above. The inner duct is fitted inside the outer duct to form a duct between the inner duct and the outer duct, and the dual-fan power mechanism is disposed in the duct.

[0014] The present invention achieves the following technical effects compared to the prior art: (i) The dual-fan power mechanism of the present invention adopts a coaxial dual-fan structure. Based on the dual-fan counter-rotation drive mechanism, it can achieve efficient power output and generate strong directional wind force, thus solving the problems of weak wind force and low efficiency of single fan.

[0015] (ii) By installing dual fans on a three-layer ring frame, a dynamic-static integrated structure is achieved. The three-layer ring frame makes the power mechanism more robust, ensuring the high-speed rotation of the dual fans and improving wind power efficiency while maintaining overall structural stability and enhancing safety.

[0016] (iii) Abandoning the traditional center-type wheel-axle transmission method, adopting the wheel-rail circumferential friction transmission method, greatly improves the efficiency of power output, reduces energy consumption, and doubles the power efficiency; (iv) By using the drive component to drive the two fans to rotate synchronously in opposite directions, the torque of the two fans can cancel each other out, eliminating the need for other redundant designs to eliminate the opposing torque, making the mechanism structure simpler and more reliable.

[0017] (v) The axial positioning part and the radial positioning part only play a positioning auxiliary role and have no power output; the cooperation between the axial positioning part and the radial positioning part and the drive wheel in the drive assembly realizes the high-precision positioning and installation of the dual fans, which can ensure that the dual fans are always centered and there is no axial movement or radial sway, so as to improve the power performance and operational reliability of the dual fan assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the dual-fan power mechanism disclosed in an embodiment of the present invention; Figure 2 This is a front view of the dual-fan power mechanism disclosed in an embodiment of the present invention; Figure 3 This is a top view of the dual-fan power mechanism disclosed in an embodiment of the present invention; Figure 4 This is a partially enlarged schematic diagram of the dual-fan power mechanism disclosed in an embodiment of the present invention.

[0020] In the figure, the attached diagram is labeled: 100 - Dual-fan power mechanism; 1-Hollowed frame; 11-First outer ring frame; 12-Middle ring frame; 13-Second outer ring frame; 14-Inner ring support; 15-Outer ring support; 16-Radial support; 17-Axial support; 18-First mounting interlayer; 19-Second mounting interlayer; 2-Dual fan assembly; 21-First fan; 22-Second fan; 23-Annular slide rail; 24-First annular guide roller; 25-Second annular guide roller; 26-Annular positioning track; 3-Drive assembly; 31-Friction wheel; 4-Axial positioning assembly; 41-First fan axial positioning wheel; 42-Second fan axial positioning wheel; 5-Radial positioning assembly; 51-First fan radial positioning wheel assembly; 511-First wheel axle; 512-First radial positioning wheel; 52-Second fan radial positioning wheel assembly; 521-Second wheel axle; 522-Second radial positioning wheel; 53-Positioning pulley. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] One of the objectives of this invention is to provide a dual-fan power mechanism that adopts a coaxial dual-fan structure and, based on the dual-fan counter-rotating drive mechanism, can achieve efficient power output and generate strong directional wind force, thereby solving the problems existing in the prior art.

[0023] Another objective of this invention is to provide a dual-fan duct system comprising the aforementioned dual-fan power mechanism, which, based on the dual-fan counter-rotating drive mechanism, can achieve efficient power output and generate strong directional wind force, thereby solving the problems existing in the prior art.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1 like Figures 1-3 As shown, this embodiment provides a dual-fan power mechanism 100, including a hollow frame 1, a dual-fan assembly 2, and a drive assembly 3. The hollow frame 1 serves as the integrated mounting base for the dual-fan assembly 2 and the drive assembly 3, and its hollow design does not affect the external force and aerodynamic performance of the dual-fan assembly 2. The dual-fan assembly 2 includes a first fan 21 and a second fan 22, both of which are rotatably mounted in the hollow frame 1. The first fan 21 and the second fan 22 are coaxially arranged, and the blades of the first fan 21 and the second fan 22 rotate in opposite directions (i.e., the blades of the two fans face the wind in opposite directions). The drive assembly 3 is mounted on the hollow frame 1 and is used to drive the first fan 21 and the second fan 22 to rotate synchronously and in opposite directions. Since the blades in the first fan 21 and the second fan 22 rotate in opposite directions, their torques can cancel each other out when the first fan 21 and the second fan 22 rotate synchronously and in opposite directions. This allows the dual-fan assembly 2 to absorb the torque internally and avoids interfering with the aerodynamic performance of the entire dual-fan power mechanism.

[0026] In some feasible implementations, the first fan 21 and the second fan 22 are identical in size, meaning they have the same inner and outer diameters and the same number of blades. To improve efficiency, the blade angle of one of the first fan 21 and the second fan 22, which acts as the frontal fan, can be set to be smaller than the blade angle of the other. Figure 2 Taking the perspective shown as an example, the first fan 21 is located above the second fan 22. As the upper fan, the first fan 21 has a smaller blade angle than the second fan 22 (for example, the blade angle of the first fan 21 is 30 degrees, while the blade angle of the second fan 22 is 45 degrees). The blade angle of the first fan 21 is relatively smaller, resulting in higher efficiency and helping to maintain stable operation of the two fans.

[0027] In some feasible implementations, the perforated frame 1 adopts a multi-layer frame structure. Taking a three-layer frame structure as an example, such as... Figures 1-3 As shown, the three-layer frame structure includes three ring frames. Each ring frame includes an inner ring support 14 and an outer ring support 15 fixed to the outer ring of the inner ring support 14. The inner ring support 14 and the outer ring support 15 are preferably coaxial and coplanar. The fixing method between them includes, but is not limited to, fixing with radial support members 16. The radial support member 16 can be a plate, rod, etc., and its inner end is fixed to the inner ring support 14. The fixing form includes, but is not limited to, welding, bolt fixing, integral molding, etc. Similarly, the outer end of the radial support member 16 is fixed to the outer ring support 15. The fixing form includes, but is not limited to, welding, bolt fixing, integral molding, etc.

[0028] In some feasible implementations, the three-layer annular frame is preferably identical in structure, coaxially arranged and spaced apart. Any two adjacent layers of the annular frame are connected and fixed by axial support members 17 to maintain the interlayer spacing of the frame, and an installation interlayer is formed between each pair of adjacent annular frames. The axial support members 17 can be plates, rods, etc., and their fixing methods to the annular frame include, but are not limited to, welding, bolting, and integral molding.

[0029] Specifically, the axial support 17 can be fixed only between the outer ring supports 15 of adjacent annular frames, or only between the inner ring supports 14 of adjacent annular frames, or both the inner and outer rings of adjacent annular frames can be fixed with the axial support 17. A structural reference for simultaneously fixing the axial support 17 to both the inner and outer rings is also possible. Figures 1-3 Axial support members 17 are evenly distributed at 90° intervals on the inner and outer rings, which makes the overall structural stability of the frame stronger.

[0030] To distinguish them, the three-layer annular frame is defined as a first outer annular frame 11, a middle annular frame 12, and a second outer annular frame 13. The mounting interlayer between the first outer annular frame 11 and the middle annular frame 12 is the first mounting interlayer 18, in which the first fan 21 is installed, with the first outer annular frame 11 located outside the first fan 21. The mounting interlayer between the second outer annular frame 13 and the middle annular frame 12 is the second mounting interlayer 19, in which the second fan 22 is installed, with the second outer annular frame 13 located outside the second fan 22. The middle annular frame 12 is located between the first fan 21 and the second fan 22. This three-layer annular frame, combined with a dual-fan design, forms a multi-layer sandwich mechanism, offering the advantages of a simple and compact structure.

[0031] In some feasible embodiments, the axial support members 17 connected to the inner rings of the first outer ring frame 11 and the intermediate ring frame 12 are preferably aligned one-to-one with the axial support members 17 connected to the inner rings of the second outer ring frame 13 and the intermediate ring frame 12. Similarly, the axial support members 17 connected to the outer rings of the first outer ring frame 11 and the intermediate ring frame 12 are preferably aligned one-to-one with the axial support members 17 connected to the outer rings of the second outer ring frame 13 and the intermediate ring frame 12.

[0032] In practical applications, the axial support members 17 of the inner ring of each pair of adjacent annular frames include, but are not limited to, a layout of four sets evenly distributed along the circumference; alternatively, two, three, six, or eight sets can also be evenly distributed. Similarly, the axial support members 17 of the outer ring of each pair of adjacent annular frames include, but are not limited to, a layout of four sets evenly distributed along the circumference; alternatively, two, three, six, or eight sets can also be evenly distributed. The number of axial support members 17 connecting the inner and outer rings of each pair of adjacent annular frames can also be different.

[0033] In some feasible implementations, it is preferable that the radial supports 16 in each layer of the annular frame can be evenly distributed in multiple groups along the circumference, such as two, three, four, six, or eight groups. Figure 3 As shown, the structure of the inner and outer ring supports in each ring frame is connected by four sets of radial supports 16 evenly distributed around the circumference, and the inner and outer ends of the radial supports 16 correspond one-to-one with the axial supports 17 of the inner and outer rings.

[0034] In some feasible implementations, the inner ring support 14 in each layer of the annular frame may, but is not limited to, being circular or polygonal. When using a polygon, it may include, but is not limited to, rectangles, regular pentagons, regular hexagons, etc. Similarly, the outer ring support 15 in each layer of the annular frame may, but is not limited to, being circular or polygonal. When using a polygon, it may include, but is not limited to, rectangles, regular pentagons, regular hexagons, etc. The inner ring support 14 and outer ring support 15 in each layer of the annular frame may have the same or different shapes, but they are coaxial. In practical applications, it is preferable that both the inner ring support 14 and the outer ring support 15 are circular, which better meets the requirements of duct design.

[0035] Since the inner rings of each two adjacent ring frames are connected by axial support members 17, in the aforementioned first mounting interlayer 18 and second mounting interlayer 19, the multiple sets of axial support members 17 evenly distributed on the inner ring constitute the inner shaft of the entire hollow frame 1. The first fan 21 and the second fan 22 can be rotatably mounted on the outside of this inner shaft, and the inner rings of the first fan 21 and the second fan 22 are in clearance fit with the inner shaft. The inner shaft plays a role in positioning and installing the first fan 21 and the second fan 22 and assisting in centering and limiting, which can improve the operational stability of the dual fans in the mechanism.

[0036] In some feasible embodiments, the dual-fan power mechanism 100 is further provided with an axial positioning component 4, which includes a first fan axial positioning part and a second fan axial positioning part. The first fan axial positioning part is disposed on the first outer annular frame 11 and / or the middle annular frame 12 of the hollow frame 1, and contacts and engages with at least one end face of the first fan 21 to axially position the first fan 21. Similarly, the second fan axial positioning part is disposed on the second outer annular frame 13 and / or the middle annular frame 12 of the hollow frame 1, and contacts and engages with at least one end face of the second fan 22 to axially position the second fan 22.

[0037] In some feasible implementations, to improve the structural integration and compactness of the entire power mechanism, the drive assembly 3 is preferably disposed on the intermediate layer annular frame 12 of the hollow frame 1, and located between the first fan 21 and the second fan 22. For example... Figures 1-4 As shown, the drive component 3 is a friction wheel 31 that integrates a hub motor. The two end faces of the first fan 21 and the second fan 22 that are close to each other are provided with annular slide rails 23 that roll and cooperate with the friction wheel 31. The hub motor drives the friction wheel 31 to rotate. The friction wheel 31 can use the contact friction force with the annular slide rails 23 to drive the first fan 21 and the second fan 22 to rotate synchronously and in opposite directions.

[0038] Specifically, refer to Figures 2-4The friction wheel 31, which integrates a hub motor, is rotatably mounted on the radial support 16 of the intermediate layer annular frame 12. On the end face of the first fan 21 near the second fan 22, a full-circle annular slide rail 23 can be provided only on the outer ring, only on the inner ring, or on both the inner and outer rings. The position of the friction wheel 31 corresponds to the position of the annular slide rail 23. Similarly, on the end face of the second fan 22 near the first fan 21, a full-circle annular slide rail 23 can be provided only on the outer ring, only on the inner ring, or on both the inner and outer rings. The position of the friction wheel 31 corresponds to the position of the annular slide rail 23. However, it should be noted that the positions of the annular slide rails 23 on the first fan 21 and the second fan 22 correspond one-to-one, specifically including three situations: Situation 1: Annular slide rails 23 are set on the inner ring at the same time, and the friction wheel 31 is also set near the inner ring bracket 14 so as to contact the annular slide rails 23 on the inner rings of the first fan 21 and the second fan 22 simultaneously; Situation 2: Annular slide rails 23 are set on the outer ring at the same time, and the friction wheel 31 is also set near the outer ring bracket 15 so as to contact the annular slide rails 23 on the outer rings of the first fan 21 and the second fan 22 simultaneously. In case 3, both the inner and outer rings of the first fan 21 and the second fan 22 are provided with annular slides 23. Friction wheels 31 are respectively positioned near the inner ring bracket 14 and near the outer ring bracket 15, so that the annular slides 23 of the outer rings of the first fan 21 and the second fan 22 are linked by the friction wheels 31 near the outer ring bracket 15, and the annular slides 23 of the inner rings of the first fan 21 and the second fan 22 are linked by the friction wheels 31 near the inner ring bracket 14. The friction wheels 31 of the inner and outer rings can be used to jointly drive the first fan 21 and the second fan 22. Figures 1-4 As shown, the first fan 21 and the second fan 22 are equipped with friction wheels 31 on both the inner and outer rings. The inner rings of the first fan 21 and the second fan 22 are evenly distributed with four sets of friction wheels 31, and the outer rings of the first fan 21 and the second fan 22 are evenly distributed with four sets of friction wheels 31.

[0039] In practical applications, the number of friction wheels 31 located on the inner rings of the first fan 21 and the second fan 22 is not limited to four sets; it can also be set to two, three, six, or eight sets as needed. Similarly, the number of friction wheels 31 located on the outer rings of the first fan 21 and the second fan 22 is not limited to four sets; it can also be set to two, three, six, or eight sets as needed.

[0040] It should be noted that each friction wheel 31 is equipped with a hub motor. The axis of each friction wheel 31 is perpendicular to the axes of the first fan 21 and the second fan 22, and is arranged radially along the first fan 21 and the second fan 22. Axial support for the first fan 21 and the second fan 22 can be achieved by the contact between the friction wheel 31 and the first fan 21 and the second fan 22.

[0041] In some feasible embodiments, the first fan axial positioning part is a first fan axial positioning wheel 41, which is rotatably mounted on a first outer annular frame 11 located outside the first fan 21; a first annular guide raceway 24 is provided on the end face of the first fan 21 away from the second fan 22, and the first fan axial positioning wheel 41 contacts and engages with the first annular guide raceway 24, with the first fan axial positioning wheel 41 and friction wheel 31 respectively axially positioning both ends of the first fan 21. Similarly, the second fan axial positioning part is a second fan axial positioning wheel 42, which is rotatably mounted on a second outer annular frame 13 located outside the second fan 22; a second annular guide raceway 25 is provided on the end face of the second fan 22 away from the first fan 21, and the second fan axial positioning wheel 42 contacts and engages with the second annular guide raceway 25, with the second fan axial positioning wheel 42 and friction wheel 31 respectively axially positioning both ends of the second fan 22.

[0042] In some feasible implementations, on the end face of the first fan 21 away from the second fan 22, a full circle of the first annular guide raceway 24 may be provided only on the outer ring, or a full circle of the first annular guide raceway 24 may be provided only on the inner ring, or a full circle of the first annular guide raceway 24 may be provided on both the inner and outer rings. The position of the first fan axial positioning wheel 41 corresponds to the position of the first annular guide raceway 24. Specifically, there are three scenarios: Scenario 1: The first fan 21 has a first annular guide raceway 24 on its inner ring, and the first fan axial positioning wheel 41 is mounted on the inner ring support 14 of the first outer annular frame 11, so as to roll in contact with the first annular guide raceway 24 on the inner ring of the outer end face of the first fan 21; Scenario 2: The first fan 21 has a first annular guide raceway 24 on its outer ring, and the first fan axial positioning wheel 41 is mounted on the outer ring support 15 of the first outer annular frame 11, so as to roll in contact with the first annular guide raceway 24 on the outer ring of the outer end face of the first fan 21; Scenario 3: The first annular guide raceway 24 is provided on both the inner and outer rings of the outer end face of the first fan 21, and the first fan axial positioning wheel 41 is mounted on both the inner ring support 14 and the outer ring support 15 of the first outer annular frame 11. (Reference) Figure 1 and Figure 3 This is a schematic diagram of a structure in which the inner and outer rings of the outer end face of the first fan 21 are provided with first annular guide raceways 24, and four first fan axial positioning wheels 41 are evenly distributed around the circumference on the inner ring bracket 14 and outer ring bracket 15 of the first outer ring frame 11.

[0043] In some feasible implementations, on the end face of the second fan 22 away from the first fan 21, a full circle of the second annular guide raceway 25 may be provided only on the outer ring, or a full circle of the second annular guide raceway 25 may be provided only on the inner ring, or a full circle of the second annular guide raceway 25 may be provided on both the inner and outer rings. The position of the second fan axial positioning wheel 42 corresponds to the position of the second annular guide raceway 25. Specifically, there are three scenarios: Scenario 1: The second fan 22 has a second annular guide raceway 25 on its inner ring, and the second fan axial positioning wheel 42 is mounted on the inner ring bracket 14 of the second outer annular frame 13, so as to roll in contact with the second annular guide raceway 25 on the inner ring of the outer end face of the second fan 22; Scenario 2: The second fan 22 has a second annular guide raceway 25 on its outer ring, and the second fan axial positioning wheel 42 is mounted on the outer ring bracket 15 of the second outer annular frame 13, so as to roll in contact with the second annular guide raceway 25 on the outer ring of the outer end face of the second fan 22; Scenario 3: The second annular guide raceway 25 is provided on both the inner and outer rings of the outer end face of the second fan 22, and the second fan axial positioning wheel 42 is mounted on both the inner ring bracket 14 and the outer ring bracket 15 of the second outer annular frame 13. (Reference) Figure 1 and Figure 3 This is a schematic diagram of a structure in which the inner and outer rings of the outer end face of the second fan 22 are provided with second annular guide raceways 25, and four axial positioning wheels 42 of the second fan are evenly distributed around the circumference on the inner ring bracket 14 and outer ring bracket 15 of the second outer ring frame 13.

[0044] Multiple axial positioning wheels are arranged on the inner and outer rings of the outer end face of each fan. This ensures reliable positioning, even force distribution on the fan, and prevents the fan from shaking during rotation due to uneven distribution of the axial positioning wheels.

[0045] In some feasible implementations, based on the structural design of the drive component 3 and the axial positioning component 4 described above, the dual-fan power mechanism 100 is further provided with a radial positioning component 5 to cooperate with the drive component 3 and the axial positioning component 4 to achieve omnidirectional positioning and installation of each fan. Specifically, the radial positioning component 5 includes a first fan radial positioning part and a second fan radial positioning part. The first fan radial positioning part is disposed on the hollow frame 1 and is located in the inner and / or outer ring of the first fan 21 to radially position the first fan 21; the second fan radial positioning part is disposed on the hollow frame 1 and is located in the inner and / or outer ring of the second fan 22 to radially position the second fan 22.

[0046] In some feasible implementations, the first fan radial positioning part is preferably the first fan radial positioning wheel set 51, such as... Figures 1-4As shown, the first fan radial positioning wheel assembly 51 includes a first wheel shaft 511 and a first radial positioning wheel 512 rotatably mounted on the first wheel shaft 511. The first wheel shaft 511 is fixed on the hollow frame 1 and parallel to the axis of the hollow frame 1. The first radial positioning wheel 512 rolls with the inner and / or outer rings of the first fan 21.

[0047] Specifically, the first fan radial positioning part can be provided only in the inner ring of the first fan 21. In this case, the first wheel axle 511 is fixed to the inner ring support 14 of the intermediate layer annular frame 12 and the first outer layer annular frame 11. The fixing method includes, but is not limited to, welding, integral molding, bolt fixing, etc. The first fan radial positioning part can also be provided only in the outer ring of the first fan 21. In this case, the first wheel axle 511 is fixed to the outer ring support 15 of the intermediate layer annular frame 12 and the first outer layer annular frame 11. The fixing method includes, but is not limited to, welding, integral molding, bolt fixing, etc. In other embodiments, the first fan radial positioning part can also be provided in both the inner and outer rings of the first fan 21. In this case, the first wheel axle 511 in the inner ring is fixed to the inner ring support 14 of the intermediate layer annular frame 12 and the first outer layer annular frame 11, and the first wheel axle 511 in the outer ring is fixed to the outer ring support 15 of the intermediate layer annular frame 12 and the first outer layer annular frame 11. Figures 1-4 The diagram shows a structure in which eight sets of radial positioning parts for the first fan 21 are respectively arranged on the inner and outer rings. The eight sets of radial positioning parts for the first fan are arranged in pairs, divided into four groups, and evenly distributed along the circumferential direction. The two radial positioning parts of the first fan in each group are symmetrically arranged on both sides of the corresponding axial support member 17.

[0048] In some feasible implementations, the second fan radial positioning part is preferably the second fan radial positioning wheel set 52, such as... Figures 1-4 As shown, the second fan radial positioning wheel assembly 52 includes a second wheel shaft 521 and a second radial positioning wheel 522 rotatably mounted on the second wheel shaft 521. The second wheel shaft 521 is fixed on the hollow frame 1 and parallel to the axis of the hollow frame 1. The second radial positioning wheel 522 rolls with the inner and / or outer rings of the second fan 21.

[0049] Specifically, the radial positioning part of the second fan can be provided only in the inner ring of the second fan 22. In this case, the second wheel shaft 521 is fixed to the inner ring support 14 of the intermediate layer annular frame 12 and the second outer layer annular frame 13. The fixing method includes, but is not limited to, welding, integral molding, bolt fixing, etc. Alternatively, the radial positioning part of the second fan can be provided only in the outer ring of the second fan 22. In this case, the second wheel shaft 521 is fixed to the outer ring support 15 of the intermediate layer annular frame 12 and the second outer layer annular frame 13. The fixing method includes, but is not limited to, welding, integral molding, bolt fixing, etc. In other embodiments, the radial positioning part of the second fan can also be provided simultaneously in the inner and outer rings of the second fan 22. In this case, the second wheel shaft 521 in the inner ring is fixed to the inner ring support 14 of the intermediate layer annular frame 12 and the second outer layer annular frame 13, and the second wheel shaft 521 in the outer ring is fixed to the outer ring support 15 of the intermediate layer annular frame 12 and the second outer layer annular frame 13. Figures 1-4 The diagram shows a structure in which eight sets of radial positioning parts for the second fan 22 are respectively arranged on the inner and outer rings. The eight sets of radial positioning parts for the second fan are arranged in pairs, divided into four groups, and evenly distributed along the circumferential direction. The two radial positioning parts of each group are symmetrically arranged on both sides of the corresponding axial support member 17.

[0050] Some feasible implementation methods, such as Figures 1-4 As shown, the first radial positioning wheel 512 is preferably a positioning pulley 52 with a groove on its outer periphery. The inner and / or outer rings of the first fan 21 are provided with an annular positioning track 26 that mates with the groove. The annular positioning track 26 is embedded in the groove of the positioning pulley 52 to provide rolling guidance for the second radial positioning wheel 522. Similarly, the second radial positioning wheel 522 is preferably a positioning pulley 52 with a groove on its outer periphery. The inner and / or outer rings of the second fan 22 are provided with an annular positioning track 26 that mates with the groove. The annular positioning track 26 is embedded in the groove to provide rolling guidance for the second radial positioning wheel 522.

[0051] To improve the structural integration of the mechanism, such as Figures 1-4 As shown, the annular positioning tracks 26 of the inner and outer rings of the first fan 21 can be integrated with the first annular guide raceway 24, that is, the first annular guide raceway 24 and the annular positioning track 26 of the first fan 21 can be regarded as the same structure. Since the axial positioning wheel 41 and the radial positioning wheel 512 of the first fan are arranged alternately along the circumference of the first fan 21, the axial positioning wheel 41 and the radial positioning wheel 512 of the first fan will not interfere with each other during operation.

[0052] Similarly, such as Figures 1-4As shown, the annular positioning tracks 26 of the inner and outer rings of the second fan 22 can be integrated with the second annular guide raceway 25, that is, the second annular guide raceway 25 and the annular positioning track 26 of the second fan 22 can be regarded as the same structure. Since the axial positioning wheel 42 and the radial positioning wheel 522 of the second fan are arranged alternately along the circumference of the second fan 22, the axial positioning wheel 42 and the radial positioning wheel 522 of the second fan will not interfere with each other during operation.

[0053] The aforementioned dual-fan power mechanism 100 is, but is not limited to, applications in wind turbines, wind tunnels, wind power generation, and aerodynamic aircraft lift rotor systems. Its specific beneficial effects are as follows: First, a dual-fan assembly is adopted, which uses a drive component to drive the two fans to rotate synchronously in opposite directions. This allows the torque of the two fans to cancel each other out, generating wind power and achieving efficient power output, thus solving the problems of weak wind power and low efficiency of a single fan.

[0054] Second, the entire system adopts a ducted, circular, hollow, large-diameter dual fan, which can generate powerful directional wind force, making the wind force more concentrated and increasing the efficiency ratio.

[0055] Third, by abandoning the traditional center-type wheel-axle transmission method and using the wheel-rail circumferential friction transmission method, the efficiency of power output is greatly improved, energy consumption is reduced, and power efficiency is multiplied. Fourth, the three-layer frame with dual fans achieves a dynamic-static integrated structure that is compact, reasonable, and more robust, ensuring safety and efficiency when the dual fans are rotating at high speed, and is suitable for various scenarios.

[0056] 5. The axial and radial positioning parts only serve as positioning aids and have no power output. The cooperation between the axial and radial positioning parts and the drive wheel in the drive assembly enables high-precision positioning and installation of the dual fans, ensuring that the dual fans are always aligned without axial movement or radial sway, thereby improving the power performance and operational reliability of the dual fan assembly.

[0057] Example 2 This embodiment proposes a dual-fan power mechanism 100, which differs from Embodiment 1 only in that: the first radial positioning wheel 512 can be a friction roller with no grooves on its outer ring, which rolls and frictionally engages with the inner and / or outer circular surfaces of the first fan 21, i.e., the first radial positioning wheel 512 is tangentially in contact with the inner and / or outer circular surfaces of the first fan 21. The second radial positioning wheel 522 can be a friction roller with no grooves on its outer ring, which rolls and frictionally engages with the inner and / or outer circular surfaces of the second fan 22, i.e., the second radial positioning wheel 522 is tangentially in contact with the inner and / or outer circular surfaces of the second fan 22.

[0058] Example 3 This embodiment proposes a dual-fan power mechanism 100, which differs from Embodiments 1 or 2 only in that: the drive assembly 3 includes a drive gear and a gear drive motor, and the two end faces of the first fan 21 and the second fan 22 that are close to each other are provided with annular gear rings that mesh with the drive gear; the gear drive motor is fixed on the radial support member 16 of the intermediate layer annular frame 12, and the gear drive motor drives the aforementioned drive gear to rotate, so that the drive gear can drive the first fan 21 and the second fan 22 to rotate synchronously and in opposite directions by utilizing the meshing relationship with the annular gear ring.

[0059] In some feasible embodiments, the drive gear is a bevel gear, and the ring gears on the first fan 21 and the second fan 22 are both bevel gear ring gears. Furthermore, the bevel gear ring gears on the first fan 21 and the second fan 22 are identical, with their tips arranged opposite each other to mesh with the drive gear simultaneously. This embodiment utilizes the bevel gear meshing relationship to drive the rotation of the first fan 21 and the second fan 22, which can prevent horizontal movement under the action of centrifugal force and angular velocity, thus providing stability and making the power mechanism more reliable.

[0060] Example 4 This embodiment proposes a dual-fan duct system, including an inner duct, an outer duct, and any one of the dual-fan power mechanisms 100 in embodiments 1 to 3. The inner duct is fitted inside the outer duct to form a duct between the inner and outer ducts, and the dual-fan power mechanism 100 is disposed in the duct.

[0061] In practical applications, the inner duct is inserted into the inner ring support 14 of the three-layer annular frame, and the outer duct is fitted outside the outer ring support 15 of the three-layer annular frame to form an integrated duct wind power system.

[0062] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0063] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A dual-fan power mechanism, characterized in that, include: Hollowed-out frame; A dual-fan assembly includes a first fan and a second fan, both of which are rotatably mounted in the hollow frame. The first fan and the second fan are coaxially arranged, and the blades of the first fan and the second fan rotate in opposite directions. A drive assembly is disposed on the hollow frame, and the drive assembly is used to drive the first fan and the second fan to rotate synchronously and in opposite directions.

2. The dual-fan power mechanism according to claim 1, characterized in that, In the first fan and the second fan, the blade angle of one of the front fans is smaller than that of the other.

3. The dual-fan power mechanism according to claim 1, characterized in that, The hollow frame includes three layers of ring frame, and each layer of the ring frame includes an inner ring support and an outer ring support fixed to the outer ring of the inner ring support. The three-layer annular frame is coaxial and spaced apart, and any two adjacent layers of the annular frame are connected and fixed by axial support members to form an installation interlayer between each two adjacent layers of the annular frame. The first fan and the second fan are respectively installed in the two mounting layers formed by the three-layer annular frame.

4. The dual-fan power mechanism according to claim 3, characterized in that, It also includes an axial positioning component, the axial positioning component comprising: The first fan axial positioning part is disposed on the hollow frame and is in contact with at least one end face of the first fan to position the first fan axially. The second fan axial positioning part is disposed on the hollow frame and is in contact with at least one end face of the second fan to position the second fan axially.

5. The dual-fan power mechanism according to claim 3, characterized in that, The drive assembly is disposed on the middle layer annular frame of the hollow frame and is located between the first fan and the second fan; The drive assembly includes a drive gear and a gear drive motor. The two end faces of the first fan and the second fan that are close to each other are provided with annular gear rings that mesh with the drive gear. The gear drive motor drives the drive gear to rotate, which can drive the first fan and the second fan to rotate synchronously and in opposite directions. Alternatively, the drive component is a friction wheel integrating a hub motor, and an annular slide rail is provided on the two adjacent end faces of the first fan and the second fan to engage with the friction wheel in rolling contact; the hub motor drives the friction wheel to rotate, which can drive the first fan and the second fan to rotate synchronously and in opposite directions.

6. The dual-fan power mechanism according to claim 5, characterized in that, The first fan axial positioning part is a first fan axial positioning wheel, which is disposed on the annular frame located outside the first fan; a first annular guide raceway is provided on the end face of the first fan away from the second fan, the first fan axial positioning wheel contacts and cooperates with the first annular guide raceway, and the first fan axial positioning wheel and the drive assembly respectively axially position the two ends of the first fan. The second fan axial positioning part is a second fan axial positioning wheel, which is disposed on the annular frame located outside the second fan; a second annular guide raceway is provided on the end face of the second fan away from the first fan, the second fan axial positioning wheel contacts and cooperates with the second annular guide raceway, and the second fan axial positioning wheel and the drive assembly respectively axially position the two ends of the second fan.

7. The dual-fan power mechanism according to any one of claims 4 to 6, characterized in that, It also includes a radial positioning component, the radial positioning component comprising: A first fan radial positioning part is disposed on the hollow frame and located in the inner and / or outer ring of the first fan to radially position the first fan. The second fan radial positioning part is disposed on the hollow frame and located in the inner and / or outer ring of the second fan to radially position the second fan.

8. The dual-fan power mechanism according to claim 7, characterized in that, The first fan radial positioning part is a first fan radial positioning wheel set. The first fan radial positioning wheel set includes a first wheel axle and a first radial positioning wheel rotatably mounted on the first wheel axle. The first wheel axle is fixed on the hollow frame and parallel to the axis of the hollow frame. The first radial positioning wheel rolls with the inner ring and / or outer ring of the first fan. The second fan radial positioning part is a second fan radial positioning wheel set. The second fan radial positioning wheel set includes a second wheel axle and a second radial positioning wheel rotatably mounted on the second wheel axle. The second wheel axle is fixed on the hollow frame and parallel to the axis of the hollow frame. The second radial positioning wheel rolls in cooperation with the inner and / or outer rings of the second fan.

9. The dual-fan power mechanism according to claim 8, characterized in that, The first radial positioning wheel is a friction roller, which makes rolling contact friction with the inner and / or outer rings of the first fan; the second radial positioning wheel is a friction roller, which makes rolling contact friction with the inner and / or outer rings of the second fan. Alternatively, the first radial positioning wheel is a positioning pulley with a groove on its outer circumference, and the inner and / or outer ring of the first fan is provided with an annular positioning track that mates with the groove. The annular positioning track is embedded in the groove to provide rolling guidance for the second radial positioning wheel.

10. A dual-fan duct system, characterized in that, The device includes an inner duct, an outer duct, and a dual-fan power mechanism as described in any one of claims 1 to 9, wherein the inner duct is fitted inside the outer duct to form a duct between the inner duct and the outer duct, and the dual-fan power mechanism is disposed in the duct.

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