Low-noise high-static-pressure fan device based on variable-section impeller

Abstract

The invention discloses a low-noise high-static-pressure fan device based on a variable-section impeller, which belongs to the technical field of fans, and comprises a shell, a cover, an impeller mechanism, a servo motor, an impeller front disc, an impeller rear disc, an impeller front disc, an impeller rear disc, an impeller front disc, an impeller rear disc and an impeller rear disc, and the impeller front disc is mounted on one side of the outer wall of the shell and arranged in the shell; the impeller is arranged on the impeller mechanism. According to the low-noise high-static-pressure fan device based on the variable-section impeller, the driving component in the adjusting mechanism drives the shielding component to move, the ventilation area of the ventilation hole can be flexibly adjusted, and therefore the flow of air entering the fan is controlled, and the flowing state of airflow at the front end of the impeller can be effectively optimized through the variable-section design; the air flow separation and vortex phenomena are reduced, the energy loss is reduced, and the fan can better adapt to the air flow characteristics under different working conditions, so that the static pressure efficiency of the fan is remarkably improved, and the working condition requirement for high pressure is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fan, and particularly relates to a low-noise high-static-pressure fan device based on a variable cross-section impeller. BACKGROUND

[0002] A fan usually relies on input mechanical energy, such as power provided by a motor, to drive an impeller to rotate at a high speed. The impeller is composed of a series of blades. When the impeller rotates, the blades exert force on the gas, increasing the pressure and velocity of the gas. The fan is an important gas conveying device. In a ventilation and air exchange system, the fan provides fresh air for a room and discharges dirty air, thereby ensuring indoor air quality. In an air conditioning system, the fan assists the circulation of refrigeration and heating medium, thereby achieving indoor temperature regulation. In industrial production, the fan is used to convey materials and provide airflow required by a process.

[0003] The cross-sectional shape of the front disc of a conventional fan impeller is fixed, which cannot adapt to various working conditions, resulting in low static pressure efficiency in some working conditions. In addition, the fan generates a large amount of noise during operation, which pollutes the surrounding environment and affects people's normal life and work. SUMMARY

[0004] The purpose of the application is to drive the shielding component to move through the driving component in the adjusting mechanism, flexibly adjust the ventilation area of the ventilation hole, control the air flow entering the fan, effectively optimize the flow state of the airflow at the front end of the impeller through the variable cross-section design, reduce airflow separation and vortex phenomenon, reduce energy loss, make the fan better adapt to the gas flow characteristics in different working conditions, thereby significantly improving the static pressure efficiency of the fan, meeting the working condition requirements with high pressure requirements, absorbing part of the noise generated during the operation of the fan through the sound-absorbing cotton, reducing the propagation of noise to the outside, and at the same time, the variable cross-section impeller front disc optimizes the airflow flow, reduces the noise generated by airflow turbulence, and further reduces the overall noise level of the fan during operation.

[0005] The technical scheme adopted by the application is as follows: a low-noise high-static-pressure fan device based on a variable cross-section impeller, comprising: a casing; a cover installed on one side of the outer wall of the casing; an impeller mechanism arranged in the casing; a servo motor installed on one side of the outer wall of the casing, a main shaft of the servo motor extending into the inner cavity of the casing and connected with the impeller mechanism; an impeller front disc arranged on the impeller mechanism; an adjusting mechanism arranged on the impeller front disc.

[0006] The impeller mechanism includes a rear cover plate and multiple blades. The rear cover plate is fixedly sleeved on the output end of the servo motor. Each blade is equidistantly fixed on one side of the outer wall of the rear cover plate along the circumferential direction. The impeller front disc is installed between each blade.

[0007] The adjustment mechanism includes an annular frame, a ventilation hole, a drive component, a shielding component, and multiple sets of connecting components. The annular frame is fixedly installed on one side of the outer wall of the impeller front disc. The ventilation hole is opened on one side of the outer wall of the annular frame. The drive component is located inside the annular frame. The shielding component is located inside the annular frame. Each set of connecting components is located on the shielding component.

[0008] The driving component includes a limiting frame, a rotating ring, a driving assembly, and multiple sets of guiding assemblies. The limiting frame is fixedly disposed on one side of the inner wall of the annular frame. The rotating ring is rotatably embedded in the inner wall of the limiting frame. The driving assembly is disposed on the rotating ring. Each set of guiding assemblies is equidistantly disposed on the rotating ring along the circumferential direction.

[0009] The drive assembly includes an arc-shaped rack, a gear, and a forward and reverse motor. The arc-shaped rack is fixedly disposed on one side of the outer wall of the rotating ring. The gear is fixedly sleeved on the output end of the forward and reverse motor, and the gear meshes with the arc-shaped rack. The forward and reverse motor is installed on one side of the inner wall of the annular frame by bolts.

[0010] Each of the guide components includes a guide hole and a guide shaft. The guide hole is opened on one side of the outer wall of the rotating ring, and the guide shaft is fixedly set on one side of the inner wall of the annular frame. The guide shaft and the guide hole are slidably engaged.

[0011] The shielding component includes multiple mounting shafts and multiple shielding plates. Each mounting shaft is fixedly disposed on one side of the inner wall of the annular frame, and each shielding plate is movably sleeved on the outer wall of the mounting shaft.

[0012] Each set of connecting components includes a mounting component, an arc-shaped connecting rod, and a connector. The mounting component is fixedly installed on one side of the outer wall of the baffle plate. One end of the arc-shaped connecting rod is movably sleeved on the outer wall of the mounting component, and the other end of the arc-shaped connecting rod is movably sleeved on the outer wall of the connector. The connector is fixedly installed on one side of the outer wall of the rotating ring.

[0013] The inner wall of the housing is fixedly provided with sound-absorbing cotton.

[0014] An air inlet is fixedly provided on one side of the outer wall of the cover, and the air inlet is connected to the interior of the ventilation hole. An exhaust port is provided on one side of the outer wall of the casing.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) In this invention, by adjusting the driving component in the mechanism to drive the blocking component to move, the ventilation area of ​​the ventilation hole can be flexibly adjusted, thereby controlling the air flow rate entering the fan. The variable cross section design can effectively optimize the flow state of the airflow at the front end of the impeller, reduce airflow separation and vortex phenomenon, reduce energy loss, and enable the fan to better adapt to the gas flow characteristics under different working conditions, thereby significantly improving the static pressure efficiency of the fan and meeting the working conditions with high pressure requirements.

[0016] (2) In this invention, the sound-absorbing cotton can absorb some of the noise generated during the operation of the fan and reduce the transmission of noise to the outside world. At the same time, the variable cross section impeller front plate optimizes the airflow and reduces the noise caused by airflow turbulence, further reducing the overall noise level of the fan during operation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the housing of the present invention; Figure 4 This is a cross-sectional view of the annular frame of the present invention; Figure 5 This is an exploded view of the adjusting mechanism of the present invention; Figure 6 This is a cross-sectional view of the adjustment mechanism of the present invention.

[0018] The markings in the diagram are: 1. Housing; 2. Cover; 3. Impeller mechanism; 301. Rear cover; 302. Blade; 4. Servo motor; 5. Impeller front disc; 6. Adjustment mechanism; 601. Annular frame; 602. Ventilation hole; 603. Limiting frame; 604. Rotating ring; 605. Arc rack; 606. Gear; 607. Forward and reverse motor; 608. Guide hole; 609. Guide shaft; 610. Mounting shaft; 611. Baffle plate; 612. Mounting component; 613. Arc connecting rod; 614. Connecting component; 7. Sound-absorbing cotton; 8. Air inlet; 9. Air outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Example 1, refer to Figures 1-6 A low-noise, high-static-pressure fan device based on a variable cross-section impeller, comprising: Casing 1; Cover 2 is installed on one side of the outer wall of casing 1; Impeller mechanism 3 is located inside housing 1; Servo motor 4 is installed on one side of the outer wall of housing 1, and the main shaft of servo motor 4 extends into the inner cavity of housing 1 and is connected to impeller mechanism 3. The impeller front plate 5 is mounted on the impeller mechanism 3; Adjustment mechanism 6 is located on the front disc of the impeller 5.

[0021] In this implementation scheme: the cover 2 and the casing 1 form a complete outer shell structure for the fan; the impeller mechanism 3 is driven by the servo motor 4 to achieve the gas conveying function; the cross-sectional shape of the impeller front plate 5 can be changed by the adjustment mechanism 6, which can optimize the flow state of the airflow at the front end of the impeller, reduce the occurrence of airflow separation and eddy currents, reduce energy loss, and thus effectively improve the static pressure efficiency of the fan. The variable cross-section design allows the fan to better adapt to the gas flow characteristics under different operating conditions and improve the overall performance.

[0022] Specifically, the impeller mechanism 3 includes a rear cover plate 301 and multiple blades 302. The rear cover plate 301 is fixedly sleeved on the output end of the servo motor 4. Each blade 302 is equidistantly fixed on one side of the outer wall of the rear cover plate 301 along the circumferential direction. The impeller front disc 5 is installed between each blade 302.

[0023] In this embodiment, the servo motor 4 drives the rear cover plate 301 to rotate, which in turn drives the blades 302 to rotate. During the rotation, the blades 302 do work on the air, enabling the air to gain energy and generate pressure and flow, thereby realizing the gas delivery function. The design of multiple blades 302 being distributed at equal intervals helps to ensure the uniformity of air flow and improve the working efficiency of the fan.

[0024] Specifically, the adjustment mechanism 6 includes an annular frame 601, a ventilation hole 602, a drive component, a shielding component, and multiple sets of connecting components. The annular frame 601 is fixedly installed on one side of the outer wall of the impeller front disc 5. The ventilation hole 602 is opened on one side of the outer wall of the annular frame 601. The drive component is located inside the annular frame 601. The shielding component is located inside the annular frame 601. Each set of connecting components is located on the shielding component.

[0025] In this embodiment: the ventilation holes 602 on the annular frame 601 provide a channel for airflow to enter and exit. Through the cooperation of the driving component, the shielding component and multiple sets of connecting components, the dynamic change of the cross section of the impeller front plate 5 is realized. When higher static pressure is required, the driving component drives the rotating ring 604 to rotate, and the shielding plate 611 is rotated through the connecting component, reducing the opening area of ​​the ventilation hole 602, changing the shape and size of the airflow channel, so that the airflow is more effectively constrained and guided at the impeller front plate, increasing the pressure energy of the airflow, thereby improving the static pressure efficiency of the fan. When lower static pressure or larger flow rate is required, the opposite adjustment can be made.

[0026] Specifically, the driving component includes a limiting frame 603, a rotating ring 604, a driving assembly, and multiple sets of guide assemblies. The limiting frame 603 is fixedly disposed on one side of the inner wall of the annular frame 601. The rotating ring 604 is rotatably embedded in the inner wall of the limiting frame 603. The driving assembly is disposed on the rotating ring 604. Each set of guide assemblies is equidistantly disposed on the rotating ring 604 along the circumferential direction.

[0027] In this embodiment: the limiting frame 603 restricts the movement trajectory of the rotating ring 604, ensuring that the rotating ring 604 can only rotate within its set range. The driving component drives the rotating ring 604 to rotate within the limiting frame 603. The guiding component further ensures the stability and accuracy of the rotation of the rotating ring 604, preventing the rotating ring 604 from deviating or shaking during rotation, and ensuring that the driving component can work reliably.

[0028] Specifically, the drive assembly includes an arc-shaped rack 605, a gear 606, and a forward and reverse motor 607. The arc-shaped rack 605 is fixedly disposed on one side of the outer wall of the rotating ring 604. The gear 606 is fixedly sleeved on the output end of the forward and reverse motor 607, and the gear 606 meshes with the arc-shaped rack 605. The forward and reverse motor 607 is installed on one side of the inner wall of the annular frame 601 by bolts.

[0029] In this embodiment: When the forward and reverse motor 607 is powered on, it drives the gear 606 to rotate. Since the gear 606 meshes with the arc-shaped rack 605, it drives the rotating ring 604 to rotate within the limiting frame 603.

[0030] Specifically, each guide assembly includes a guide hole 608 and a guide shaft 609. The guide hole 608 is opened on one side of the outer wall of the rotating ring 604, and the guide shaft 609 is fixedly set on one side of the inner wall of the annular frame 601, and the guide shaft 609 and the guide hole 608 are slidably engaged.

[0031] In this embodiment, the guide shaft 609 slides into the guide hole 608 to ensure the stability and accuracy of the rotation process of the rotating ring 604, and to avoid deviation or shaking.

[0032] Specifically, the shielding component includes multiple mounting shafts 610 and multiple shielding plates 611. Each mounting shaft 610 is fixedly disposed on one side of the inner wall of the annular frame 601, and each shielding plate 611 is movably sleeved on the outer wall of the mounting shaft 610.

[0033] In this embodiment, the baffle plate 611 can rotate around the mounting shaft 610. By changing the position and angle of the baffle plate 611, the ventilation area of ​​the ventilation hole 602 can be adjusted, thereby controlling the airflow into the fan and realizing flexible adjustment of the fan operating parameters.

[0034] Specifically, each set of connecting components includes a mounting part 612, an arc-shaped connecting rod 613, and a connector 614. The mounting part 612 is fixedly installed on one side of the outer wall of the baffle plate 611. One end of the arc-shaped connecting rod 613 is movably sleeved on the outer wall of the mounting part 612, and the other end of the arc-shaped connecting rod 613 is movably sleeved on the outer wall of the connector 614. The connector 614 is fixedly installed on one side of the outer wall of the rotating ring 604.

[0035] In this embodiment, the connecting component transmits the rotational motion of the rotating ring 604 to the baffle plate 611. When the rotating ring 604 rotates under the action of the driving component, the baffle plate 611 is driven to rotate around the mounting shaft 610 through the arc-shaped connecting rod 613, thereby realizing the function of adjusting the ventilation area of ​​the ventilation hole 602 by the baffle plate 611.

[0036] Specifically, sound-absorbing cotton 7 is fixedly installed on the inner wall of the casing 1.

[0037] In this embodiment, the function of the sound-absorbing cotton 7 is to absorb some of the noise generated during the operation of the fan, reduce the transmission of noise to the outside world, thereby reducing the overall noise level of the fan during operation and providing a quieter working environment.

[0038] Specifically, an air inlet 8 is fixedly provided on one side of the outer wall of the cover 2, and the air inlet 8 is connected to the interior of the ventilation hole 602. An exhaust vent 9 is provided on one side of the outer wall of the casing 1.

[0039] In this embodiment: the air inlet 8 provides a channel for outside air to enter the fan, ensuring that the fan can normally draw in air for subsequent gas transportation. The air outlet 9 facilitates the exhaust of air. The forward and reverse motors 607 and servo motor 4 are powered by an external power source and should be electrically connected to the external power source. The internal circuit principle and structure are common knowledge to those skilled in the art.

[0040] In use, the cross-section of the impeller front disc 5 is adjusted as needed. The forward and reverse motor 607 is then started, driving the gear 606 to rotate. Since the gear 606 meshes with the arc-shaped rack 605, it drives the rotating ring 604 to rotate within the limiting frame 603. Simultaneously, the guide shaft 609 slides with the guide hole 608, ensuring the stability and accuracy of the rotating ring 604's rotation and preventing deviation or wobbling. The arc-shaped connecting rod 613 drives the baffle plate 611 to rotate around the mounting shaft 610, thereby enabling the baffle plate 611 to adjust the ventilation area of ​​the ventilation hole 602. By controlling the airflow into the fan, the airflow channel at the impeller front plate 5 changes as the ventilation area of ​​the ventilation hole 602 is adjusted, thereby achieving dynamic changes in the cross-section of the impeller front plate 5. This change optimizes the airflow state at the impeller front plate 5, reduces airflow separation and eddy current phenomena, reduces energy loss, and effectively improves the static pressure efficiency of the fan. When the noise generated during the operation of the fan encounters the sound-absorbing cotton 7 during propagation, the porous structure of the sound-absorbing cotton 7 can absorb some of the noise energy, reduce the propagation of noise to the outside, and thus reduce the overall noise level of the fan during operation.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low noise high static pressure fan device based on variable area impeller, characterized by, Include: The shell (1); Machine cover (2), installed in the outer wall of the shell (1) side; Impeller mechanism (3), provided in the shell (1); Servo motor (4), installed in the outer wall of the shell (1) side, the spindle of the servo motor (4) extends into the cavity of the shell (1) and is connected with the impeller mechanism (3); Impeller front disc (5), provided on the impeller mechanism (3); Adjusting mechanism (6), provided on the impeller front disc (5).

2. A low noise high static pressure fan device based on variable area impeller as claimed in claim 1 characterized in that: The impeller mechanism (3) includes a rear cover plate (301) and a plurality of blades (302), the rear cover plate (301) is fixedly sleeved on the output end of the servo motor (4), each blade (302) is fixedly arranged on the outer wall of the rear cover plate (301) in the circumferential direction, and the impeller front disc (5) is installed between each blade (302).

3. A low noise high static pressure fan device based on variable area impeller as claimed in claim 2 wherein: The adjusting mechanism (6) includes an annular frame (601), a ventilation hole (602), a driving component, a shielding component and a plurality of connecting components, the annular frame (601) is fixedly arranged on the outer wall of the impeller front disc (5), the ventilation hole (602) is arranged on the outer wall of the annular frame (601), the driving component is arranged in the annular frame (601), the shielding component is arranged in the annular frame (601), and each connecting component is arranged on the shielding component.

4. A low noise high static pressure fan device based on variable area impeller as claimed in claim 3 wherein: The driving component includes a limiting frame (603), a rotating ring (604), a driving assembly and a plurality of guide assemblies, the limiting frame (603) is fixedly arranged on the inner wall of the annular frame (601), the rotating ring (604) is rotatably embedded on the inner wall of the limiting frame (603), the driving assembly is arranged on the rotating ring (604), and each guide assembly is arranged on the rotating ring (604) in the circumferential direction.

5. A low noise high static pressure fan device based on variable area impeller as claimed in claim 4 wherein: The driving assembly includes an arc-shaped rack (605), a gear (606) and a reversible motor (607), the arc-shaped rack (605) is fixedly arranged on the outer wall of the rotating ring (604), the gear (606) is fixedly sleeved on the output end of the reversible motor (607), and the gear (606) is engaged with the arc-shaped rack (605), and the reversible motor (607) is installed on the inner wall of the annular frame (601) through bolts.

6. A low noise high static pressure fan device based on variable area impeller as claimed in claim 5 wherein: Each guide assembly includes a guide hole (608) and a guide shaft (609), the guide hole (608) is arranged on the outer wall of the rotating ring (604), the guide shaft (609) is fixedly arranged on the inner wall of the annular frame (601), and the guide shaft (609) is slidably connected with the guide hole (608).

7. A low noise high static pressure fan device based on variable area impeller as claimed in claim 6 wherein: The shielding component includes a plurality of mounting shafts (610) and a plurality of shielding plates (611), each mounting shaft (610) is fixedly arranged on the inner wall of the annular frame (601), and each shielding plate (611) is movably sleeved on the outer wall of the mounting shaft (610).

8. A low noise high static pressure fan device based on variable area impeller as claimed in claim 7 wherein: Each of the connecting components comprises a mounting piece (612), an arc-shaped connecting rod (613) and a connecting piece (614), the mounting piece (612) is fixedly arranged on one side of the outer wall of the shielding plate (611), one end of the arc-shaped connecting rod (613) is movably sleeved on the outer wall of the mounting piece (612), and the other end of the arc-shaped connecting rod (613) is movably sleeved on the outer wall of the connecting piece (614), and the connecting piece (614) is fixedly arranged on one side of the outer wall of the rotating ring (604).

9. A low noise high static pressure fan device based on variable area impeller as claimed in claim 8 wherein: The inner wall of the shell (1) is fixedly provided with sound-absorbing cotton (7).

10. A low noise high static pressure fan device based on variable area impeller as claimed in claim 9 wherein: One side of the outer wall of the machine cover (2) is fixedly provided with an air inlet (8), the air inlet (8) is in communication with the inside of the ventilation hole (602), and one side of the outer wall of the shell (1) is provided with an air outlet (9).

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