Coaxial counter-rotating fan

Abstract

The utility model discloses a coaxial counter-rotating type fan which comprises a ventilation pipeline, a fan cover and a fan cover. The reverse rotation assembly is connected with the ventilation pipeline; and the two fan blades are respectively connected with the reverse rotating assembly. And the fan blades are made into a coaxial reverse rotation type, so that the energy efficiency is improved. The utility model relates to the technical field of ventilation equipment, in particular to a coaxial reverse fan. The technical problem to be solved by the utility model is to provide the coaxial counter-rotating type fan, the fan blades are made into a coaxial counter-rotating type, the torque is balanced during rotation, and the stress on a bearing is uniform, so that the service life of the fan is prolonged, the air volume and the air pressure are increased, and the energy efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a coaxial reverse-rotating fan. Background Art

[0002] A fan is a household appliance or device that uses an electric motor to rotate blades, thereby accelerating air circulation. Fans are widely used in homes, offices, factories, data centers, and other places. Their primary function is to provide a cool breeze, helping to reduce the ambient temperature and increase human comfort.

[0003] Existing fans have at least the following problems: Problem 1: Existing asynchronous motor fans have low energy conversion efficiency. Problem 2: Existing asynchronous motor fans have low air volume and pressure due to their external dimensions. Problem 3: Unidirectional rotating blades have unbalanced torque, placing heavy loads on bearings and shortening their lifespan.

[0004] Currently, there is still a lack of a coaxial counter-rotating fan to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a coaxial reversing fan, in which the fan blades are made into a coaxial reversing type, the torque is balanced during rotation, the bearings are subjected to uniform force, the fan life is prolonged, the air volume and pressure are increased, and the energy efficiency is improved.

[0006] The utility model adopts the following technical solutions to achieve the purpose of the utility model:

[0007] A coaxial counter-rotating fan is characterized by comprising: a hollow ventilation duct; a counter-rotating assembly connected to the ventilation duct; and two fan blades, each connected to the counter-rotating assembly. The fan blades are coaxially counter-rotating to improve energy efficiency.

[0008] As a further limitation of the present technical solution, a fixed component is connected to the ventilation duct, and the reverse rotating component is connected to the fixed component. By providing the fixed component, the installation of the reverse rotating component is facilitated.

[0009] As a further limitation of the present technical solution, the fixing assembly includes a motor mounting platform, and the motor mounting platform is fixedly connected to the ventilation duct via a set of reinforcing ribs. By providing the motor mounting platform, installation of the counter-rotating assembly is facilitated.

[0010] As a further limitation of this technical solution, the counter-rotating assembly includes a symmetrical rotor, a symmetrical large stator, and a symmetrical small stator. The symmetrical small stators are respectively nested in the corresponding large stators, and the symmetrical rotors are respectively arranged in the corresponding small stators. The motor mounting platform is fixedly connected to two sets of symmetrical threaded columns. Connecting bolts pass through the through holes on the large stator and are threadedly connected to the threaded columns. Two sets of screws pass through the fan blade cover and the corresponding fan blade, and the two sets of screws are respectively threadedly connected to the corresponding rotors. The rotors on both sides rotate in opposite directions, thereby achieving opposite rotation of the fan blades on both sides.

[0011] As a further limitation of this technical solution, the fan blades are provided with mounting grooves, the fan blade cover plates match the mounting grooves, the fan blades are fixedly connected to a positioning ring, and the rotor end is a stepped frustum, which matches the positioning ring. The use of mounting grooves facilitates positioning of the fan blade cover plates, and the provision of positioning rings facilitates installation of the fan blades, thereby achieving an integrated structure of the fan blade cover plate, fan blades, and rotor.

[0012] As a further limitation of the present technical solution, the large stator is provided with symmetrical arc slots, and the small stator matches the symmetrical arc slots. By adopting the arc slots, the installation of the small stator is facilitated.

[0013] As a further limitation of the present technical solution, positioning ring grooves are respectively provided at both ends of the motor mounting platform, and the symmetrical large stators match the symmetrical positioning ring grooves. By adopting the positioning ring grooves, the positioning of the large stator is achieved.

[0014] As a further limitation of the present technical solution, the ventilation duct and the motor mounting platform are respectively provided with a wire threading groove, and the ventilation duct and the motor mounting platform are respectively fixedly connected to a double wire passing groove corresponding to the wire threading groove. The use of the wire threading groove and the double wire passing groove facilitates the introduction of power.

[0015] As a further limitation of this technical solution, the counter-rotating assemblies further include a core shaft, wherein the symmetrical rotors are respectively fixedly connected to the outer rings of the bearings, and the symmetrical inner rings of the bearings are respectively fixedly connected to the core shaft. The use of the core shaft facilitates the coaxial installation of the counter-rotating assemblies on both sides.

[0016] As a further limitation of the present technical solution, both ends of the installation tube are fixedly connected to frames, thereby facilitating the installation of the installation tube.

[0017] Compared with related technologies, the coaxial counter-rotating fan provided by the present invention has the following beneficial effects:

[0018] (1) The fan blades of this device are made into coaxial reverse type, which can improve energy efficiency by 6%-16%;

[0019] (2) This device uses a core shaft to connect two fan blades in series to increase the air volume and pressure;

[0020] (3) The fan blades of this device are made into a coaxial reversing type, the torque is balanced during rotation, the bearings are evenly stressed, and the life of the fan is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0023] Figure 3 The explosion of the utility model Figure 1 ;

[0024] Figure 4 The explosion of the utility model Figure 2 ;

[0025] Figure 5 It is a partially cutaway structural schematic diagram of the present utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the reverse rotating component of the present utility model.

[0027] In the figure: 1. ventilation duct, 2. fan blade, 3. frame, 4. fan blade cover, 5. screw, 6. double wire groove, 7. motor mounting platform, 8. positioning ring groove, 9. threaded column, 10. reinforcement rib, 11. wire groove, 12. core shaft, 13. rotor, 14. bearing, 15. small stator, 16. large stator, 17. mounting groove, 18. positioning ring, 19. arc slot, 20. stepped frustum. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] A coaxial counter-rotating fan comprises: a ventilation duct 1 having a hollow interior; a counter-rotating assembly connected to the ventilation duct 1; and two fan blades 2, each connected to the counter-rotating assembly. The fan blades are coaxially counter-rotating to improve energy efficiency.

[0030] The ventilation duct 1 is connected to a fixed component, and the reverse rotation component is connected to the fixed component. By providing the fixed component, the installation of the reverse rotation component is facilitated.

[0031] The fixing assembly includes a motor mounting platform 7, and the motor mounting platform 7 is fixedly connected to the ventilation duct 1 through a set of reinforcing ribs 10. By providing the motor mounting platform 7, the installation of the counter-rotating assembly is facilitated.

[0032] The counter-rotating assembly includes a symmetrical rotor 13, a symmetrical large stator 16, and a symmetrical small stator 15. The symmetrical small stators 15 are respectively nested in the corresponding large stators 16, and the symmetrical rotors 13 are respectively arranged in the corresponding small stators 15. The motor mounting platform 7 is fixedly connected to two sets of symmetrical threaded columns 9. The connecting bolts pass through the through holes on the large stator 16 and are threadedly connected to the threaded columns 9. Two sets of screws 5 pass through the fan blade cover 4 and the corresponding fan blade 2, and the two sets of screws 5 are respectively threadedly connected to the corresponding rotor 13. The rotors 13 on both sides rotate in opposite directions, thereby achieving opposite rotation of the fan blades 2 on both sides.

[0033] The fan blade 2 is provided with a mounting groove 17, the fan blade cover plate 4 matches the mounting groove 17, the fan blade 2 is fixedly connected to the positioning ring 18, and the end of the rotor 13 is a stepped cone 20, and the stepped cone 20 matches the positioning ring 18. The use of the mounting groove 17 facilitates the positioning of the fan blade cover plate 4, and the provision of the positioning ring 18 facilitates the installation of the fan blade 2, so that the fan blade cover plate 4, the fan blade 2 and the rotor 13 are integrated.

[0034] The large stator 16 is provided with symmetrical arc slots 19, and the small stator 15 matches the symmetrical arc slots 19. By adopting the arc slots 19, the installation of the small stator 15 is facilitated.

[0035] The motor mounting platform 7 is provided with positioning ring grooves 8 at both ends, and the symmetrical large stator 16 matches the symmetrical positioning ring grooves 8. By adopting the positioning ring grooves 8, the positioning of the large stator 16 is achieved.

[0036] The ventilation duct 1 and the motor mounting platform 7 are respectively provided with a wire threading groove 11, and the ventilation duct 1 and the motor mounting platform 7 are respectively fixedly connected to the double wire passing groove 6 corresponding to the wire threading groove 11. The wire threading groove 11 and the double wire passing groove 6 facilitate the introduction of power supply.

[0037] The counter-rotating assembly further includes a core shaft 12. The symmetrical rotors 13 are respectively fixedly connected to the outer rings of the bearings 14, and the symmetrical inner rings of the bearings 14 are respectively fixedly connected to the core shaft 12. By using the core shaft 12, it is convenient to coaxially install the counter-rotating assemblies on both sides.

[0038] The inner ring of the bearing 14 is fixed to the core shaft 12 via a retaining ring and a retaining spring.

[0039] The two ends of the installation tube 1 are respectively fixedly connected to the frame 3. By adopting the frame 3, the installation of the installation tube 1 is conveniently achieved.

[0040] Coaxial counter-rotating fans can be DC or AC fans.

[0041] The rotational speeds of the two fan blades 2 may differ in a certain manner.

[0042] The fan blades 2 may also have different blade shapes to increase the air volume and pressure.

[0043] The ventilation duct 1 can be made into a nozzle shape that is thin in the middle and thick at both ends.

[0044] The core shaft 12 is fixedly connected to the motor mounting platform 7 .

[0045] The coil is wound around the small stator 15 , and the wires pass through the wire groove 11 to connect to the small stator 15 .

[0046] The working principle of the coaxial counter-rotating fan provided by the utility model is as follows:

[0047] The small stator 15 is energized to make the rotors 13 on both sides rotate in opposite directions, thereby realizing the rotation of the fan blades 2. Due to the reaction force principle, when one fan blade 2 rotates, the air passing through the blade will generate a force with an opposite angular velocity on the device. This force has a relatively large resistance to the reverse rotating component. However, the coaxial reverse fan blades 2 do not have this problem. The torques generated by the two groups of reverse rotating fan blades 2 cancel each other out. Since the air vortex at the tip of the fan blade 2 is eliminated, the coaxial reverse fan blades 2 can improve the efficiency by about 6%-16% compared with the general unidirectional rotating fan blades 2.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A coaxial counter-rotating fan, characterized in that: include: A ventilation duct (1) which is hollow inside; a counter-rotating assembly connected to the ventilation duct (1); Two fan blades (2), respectively connected to the counter-rotating components; A fixed component is connected inside the ventilation duct (1), and the reverse rotation component is connected to the fixed component; The fixing assembly comprises a motor mounting platform (7), and the motor mounting platform (7) is fixedly connected to the ventilation duct (1) via a set of reinforcing ribs (10); The counter-rotating assembly comprises a symmetrical rotor (13), a symmetrical large stator (16) and a symmetrical small stator (15), wherein the symmetrical small stators (15) are respectively nested in the corresponding large stators (16), and the symmetrical rotors (13) are respectively arranged in the corresponding small stators (15). The motor mounting platform (7) is fixedly connected to two groups of symmetrical threaded columns (9), and the connecting bolts pass through the through holes on the large stator (16) and are threadedly connected to the threaded columns (9). Two groups of screws (5) respectively pass through the fan blade cover (4) and the corresponding fan blade (2), and the two groups of screws (5) are respectively threadedly connected to the corresponding rotor (13).

2. The coaxial counter-rotating fan according to claim 1, characterized in that: The fan blade (2) is provided with a mounting groove (17), the fan blade cover plate (4) matches the mounting groove (17), the fan blade (2) is fixedly connected to a positioning ring (18), the end of the rotor (13) is a stepped frustum (20), and the stepped frustum (20) matches the positioning ring (18).

3. The coaxial counter-rotating fan according to claim 1, wherein: The large stator (16) is provided with symmetrical arc slots (19), and the small stator (15) matches the symmetrical arc slots (19).

4. The coaxial counter-rotating fan according to claim 1, wherein: Positioning ring grooves (8) are respectively provided at both ends of the motor mounting platform (7), and the symmetrical large stator (16) matches the symmetrical positioning ring grooves (8).

5. The coaxial counter-rotating fan according to claim 1, wherein: The ventilation duct (1) and the motor mounting platform (7) are respectively provided with a wire threading groove (11), and the ventilation duct (1) and the motor mounting platform (7) are respectively fixedly connected to the double wire passing groove (6) corresponding to the wire threading groove (11).

6. The coaxial counter-rotating fan according to claim 1, characterized in that: The counter-rotating assembly further comprises a core shaft (12), the symmetrical rotors (13) are respectively fixedly connected to the outer rings of bearings (14), and the symmetrical inner rings of the bearings (14) are respectively fixedly connected to the core shaft (12).

7. The coaxial counter-rotating fan according to claim 1, characterized in that: Both ends of the ventilation duct (1) are respectively fixedly connected to frames (3).

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