Energy-saving fan with mechanically adjustable blade angle of impeller assembly

Abstract

The invention discloses an energy-saving fan with mechanically-adjustable blade angles of an impeller assembly, and relates to the technical field of fan manufacturing, and the energy-saving fan is technically characterized by comprising a rack, a machine shell is fixedly mounted on the rack, a hollow shaft rod is arranged in an inner cavity of the machine shell, a plurality of blades are rotationally connected to the hollow shaft rod through a rotating seat, and the blades are arranged on the rotating seat. A blade angle adjusting assembly is arranged in the hollow shaft rod and comprises an air pipe installed in an inner cavity of the hollow shaft rod through a bearing, and a servo motor is arranged at one end of the air pipe. The effective windward area of the blades can be dynamically adjusted, different flow and wind pressure working conditions can be adapted, energy-saving operation is achieved, meanwhile, self-cleaning of the blades is completed by means of linkage of the rectangular blocks and the bevel edge sub-blades, pneumatic performance reduction caused by dust accumulation is avoided, it is continuously guaranteed that the draught fan is efficient and saves energy, and the draught fan is adapted to complex working condition requirements of multiple fields.

Description

Technical Field

[0001] This invention relates to the field of wind turbine manufacturing technology, specifically to an energy-saving wind turbine with mechanically adjustable impeller blade angle. Background Technology

[0002] As a core general-purpose energy-consuming device widely used in industrial production, mine ventilation, HVAC, chemical processes, and municipal engineering, fans occupy an important position in both industrial production and people's livelihood. Their operating efficiency, energy consumption characteristics, and regulation capabilities directly affect the energy consumption, operating costs, and achievement of energy conservation and emission reduction targets of the entire system.

[0003] However, most conventional fans on the market currently adopt a fixed blade angle structure. In actual operation, they cannot adjust the blades to the optimal aerodynamic angle according to changes in operating conditions, flow rate, wind pressure and load. This leads to decreased efficiency and increased energy consumption when the fan deviates from the design operating conditions, making it difficult to meet the actual needs of high efficiency, energy saving and stable operation under complex and variable operating conditions. Therefore, we propose a new type of energy-saving fan with mechanically adjustable impeller blade angle. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an energy-saving fan with mechanically adjustable impeller blade angle, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving fan with mechanically adjustable impeller blade angle, comprising a frame, a housing fixedly mounted on the frame, a hollow shaft provided in the inner cavity of the housing, a plurality of blades rotatably connected to the hollow shaft via a rotating seat, the number of blades being a plurality, and a blade angle adjustment component provided inside the hollow shaft.

[0006] The blade angle adjustment assembly includes an air tube mounted on the inner cavity of a hollow shaft via bearings. A servo motor is installed at one end of the air tube, and the output end of the servo motor is fixedly connected to the air tube and fixedly installed in the inner cavity of the hollow shaft. The hollow shaft has several angle adjustment slots evenly distributed circumferentially. Several adjustment rods are fixedly installed on the outside of the air tube. Each adjustment rod corresponds to one of the angle adjustment slots and passes through the corresponding angle adjustment slot. Multiple sections of pneumatic telescopic rods are fixedly installed in the inner cavity of each adjustment rod. The multiple sections of pneumatic telescopic rods are connected to the inner cavity of the air tube. A linkage rod is fixedly installed at the telescopic end of each multiple sections of pneumatic telescopic rod. The linkage rod slides with the adjustment rod. A rectangular block is fixedly installed on the linkage rod. The rectangular block slides with the blade and is used to drive the blade to deflect around the swivel seat.

[0007] Preferably, the other end of the air pipe away from the servo motor is fixedly connected to a suction pump. The suction end of the suction pump is fixedly connected to the air pipe. The suction pump is located in the inner cavity of the hollow shaft. Both ends of the hollow shaft are set as open structures.

[0008] Preferably, the blade includes a mother blade, which is rotatably connected to a hollow shaft via a rotating seat. The mother blade has receiving grooves on both the left and right sides inside, and each receiving groove has a telescopic spring fixedly installed in its inner cavity. A beveled sub-blade is fixedly installed at the end of the telescopic spring away from the bottom of the receiving groove. The beveled sub-blade slides with the receiving groove and can be completely stored in the receiving groove.

[0009] Preferably, the inner cavity of the rectangular block is provided with a slanted push groove, the inclination angle of the slanted push groove matches the inclination angle of the slanted side piece, and the volume of the receiving groove is greater than the volume of the slanted side piece.

[0010] Preferably, the front of the housing has an air inlet, and a shaft bracket is fixedly installed on the housing at the position corresponding to the air inlet. One end of the hollow shaft is rotatably engaged with the shaft bracket, and the other end of the hollow shaft is rotatably engaged with the inner side wall of the housing. An air outlet communicating with the inner cavity is provided on the side of the housing.

[0011] Preferably, a connecting plate is fixedly installed in the inner cavity of the end of the hollow shaft away from the shaft frame. The connecting plate is coaxially arranged with the hollow shaft. A power motor is fixedly installed on the outer side of the frame. The output end of the power motor is fixedly connected to the connecting plate, and the output shaft of the power motor is coaxially arranged with the hollow shaft.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This invention, through the cooperation of rectangular blocks and adjustment components, can precisely adjust the blade angle to keep it at the optimal aerodynamic angle of attack, effectively solving the problem of efficiency reduction of fixed blade fans when deviating from the design conditions, and significantly improving the operating efficiency of the fan under all operating conditions.

[0014] 2. This invention uses a linkage structure between rectangular blocks and inclined sub-plates, combined with the telescopic control of multiple pneumatic telescopic rods, to dynamically adjust the effective windward area of ​​the blades, thereby adapting to varying flow and wind pressure requirements. This solves the problems of high energy consumption and poor adjustment capability of traditional fans, achieving energy-saving operation.

[0015] 3. This invention uses the reciprocating sliding of a rectangular block on the mother blade to drive the extension and retraction of the inclined sub-blades, thereby achieving automatic scraping and cleaning of the adhering substances on the blade surface. This solves the problem of aerodynamic performance degradation caused by dust accumulation on the blades after long-term operation of the fan, and continuously ensures the energy-saving and efficient operation of the fan. Attached Figure Description

[0016] Figure 1 This is a complete structural schematic diagram of the present invention;

[0017] Figure 2 For the present invention Figure 1 Another perspective structural diagram;

[0018] Figure 3 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 4 This is a schematic diagram of the blade structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the blade angle adjustment assembly of the present invention;

[0021] Figure 6 This is a schematic diagram of the blade angle adjustment component of the present invention from another perspective.

[0022] Figure 7 This is a schematic diagram of the adjusting rod of the present invention;

[0023] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A above;

[0024] Figure 9 This is a schematic cross-sectional view of the blade of the present invention;

[0025] Figure 10 For the present invention Figure 9 A magnified structural diagram of point B above.

[0026] In the picture:

[0027] 1. Frame; 2. Housing; 3. Hollow shaft; 4. Blade; 41. Mother blade; 42. Receiving groove; 43. Telescopic spring; 44. Beveled sub-blade; 5. Blade angle adjustment assembly; 51. Air pipe; 52. Servo motor; 53. Angle adjustment groove; 54. Adjusting rod; 55. Multi-section pneumatic telescopic rod; 56. Linkage rod; 57. Rectangular block; 59. Integrated suction pump; 6. Air inlet; 7. Shaft bracket; 8. Air outlet; 9. Connecting plate; 10. Power motor; 11. Angled push groove. Detailed Implementation

[0028] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0029] This invention provides a technical solution:

[0030] Please see Figures 1-10 An energy-saving fan with mechanically adjustable impeller blade angle includes a frame 1, a housing 2 fixedly mounted on the frame 1, a hollow shaft 3 provided in the inner cavity of the housing 2, and a number of blades 4 rotatably connected to the hollow shaft 3 via a rotating seat. The hollow shaft 3 is equipped with a blade angle adjustment component 5.

[0031] The blade angle adjustment assembly 5 includes an air pipe 51 mounted on the inner cavity of the hollow shaft 3 via bearings. A servo motor 52 is mounted at one end of the air pipe 51, and the output end of the servo motor 52 is fixedly connected to the air pipe 51. The servo motor 52 is also fixedly mounted on the inner cavity of the hollow shaft 3. Several angle adjustment slots 53 are evenly distributed circumferentially on the hollow shaft 3. Several adjustment rods 54 are fixedly mounted on the outer side of the air pipe 51. Each adjustment rod 54 corresponds to one angle adjustment slot 53 and passes through the corresponding angle adjustment slot 53. Multiple pneumatic telescopic rods 5 are fixedly mounted inside the inner cavity of each adjustment rod 54. 5. The multi-section pneumatic telescopic rod 55 is connected to the inner cavity of the air pipe 51. The telescopic end of the multi-section pneumatic telescopic rod 55 is fixedly installed with a linkage rod 56. The linkage rod 56 is slidably engaged with the adjusting rod 54. A rectangular block 57 is fixedly installed on the linkage rod 56. The rectangular block 57 is slidably adapted to the blade 4 and is used to drive the blade 4 to deflect around the rotating seat. The other end of the air pipe 51 away from the servo motor 52 is fixedly connected to a suction pump 58. The suction end of the suction pump 58 is fixedly connected to the air pipe 51. The suction pump 58 is located in the inner cavity of the hollow shaft rod 3. Both ends of the hollow shaft rod 3 are set as open structures.

[0032] The servo motor 52 drives the air pipe 51 to rotate, which in turn drives the adjusting rod 54 and the multi-section pneumatic telescopic rod 55 to rotate. This, in turn, causes the rectangular block 57 to deflect via the linkage rod 56, driving the blade 4 to deflect around the rotating seat to adjust the angle. The suction pump 58 controls the extension and retraction of the multi-section pneumatic telescopic rod 55 through the air pipe 51, further adjusting the position of the rectangular block 57 to change the effective windward area of ​​the blade 4. The openings at both ends of the hollow shaft 3 not only facilitate the suction pump 58 to draw in and exhaust air, but also facilitate the heat dissipation of the servo motor 52.

[0033] Please see Figure 1 , Figure 3 , Figure 4 , Figure 9 and Figure 10The blade 4 includes a mother blade 41, which is rotatably connected to the hollow shaft 3 via a rotating seat. The mother blade 41 has receiving grooves 42 on both the left and right sides inside. Each receiving groove 42 has a telescopic spring 43 fixedly installed in its inner cavity. A beveled sub-blade 44 is fixedly installed at the end of the telescopic spring 43 away from the bottom of the receiving groove 42. The beveled sub-blade 44 slides with the receiving groove 42 and can be completely stored in the receiving groove 42.

[0034] When the rectangular block 57 slides on the mother blade 41, its inclined push groove 11 interacts with the inclined sub-blade 44, driving the inclined sub-blade 44 to extend and retract within the receiving groove 42; dynamically adjusting the overall effective windward area of ​​the blade 4 to adapt to changing operating conditions, while achieving self-cleaning of the blade 4 surface through the extension and retraction of the inclined sub-blade 44 and the repeated movement of the rectangular block 57, preventing dust accumulation from affecting aerodynamic performance.

[0035] In some embodiments, the inner cavity of the rectangular block 57 is provided with a sloping push groove 11, the inclination angle of the sloping push groove 11 matches the inclination angle of the sloping side piece 44, and the volume of the receiving groove 42 is greater than the volume of the sloping side piece 44.

[0036] In this embodiment, when the multi-section pneumatic telescopic rod 55 drives the rectangular block 57 to slide on the mother plate 41, the inclined push groove 11 in the inner cavity of the rectangular block 57, with its inclined surface angle matching the inclined sub-plate 44, pushes and pushes it, driving the inclined sub-plate 44 to extend and retract within the receiving groove 42. Since the volume of the receiving groove 42 is larger than the volume of the inclined sub-plate 44, the inclined sub-plate 44 can be completely housed within it. The angle matching design between the inclined push groove 11 and the inclined sub-plate 44 realizes the precise dynamic adjustment of the effective windward area of ​​the blade 4, adapting to the flow and wind pressure requirements of different operating conditions. At the same time, the reciprocating sliding of the rectangular block 57 drives the inclined sub-plate 44 to extend and retract, completing the self-cleaning of the surface of the blade 4. The volume design of the receiving groove 42 ensures the structural smoothness of the extension and retraction of the inclined sub-plate 44.

[0037] Please see Figures 1-5 and Figure 10 The front of the housing 2 has an air inlet 6. A shaft bracket 7 is fixedly installed on the housing 2 at the position corresponding to the air inlet 6. One end of the hollow shaft 3 is rotatably engaged with the shaft bracket 7, and the other end of the hollow shaft 3 is rotatably engaged with the inner side wall of the housing 2. An air outlet 8 connected to the inner cavity is opened on the side of the housing 2. A connecting plate 9 is fixedly installed in the inner cavity of the end of the hollow shaft 3 away from the shaft bracket 7. The connecting plate 9 is coaxial with the hollow shaft 3. A power motor 10 is fixedly installed on the outer side of the frame 1. The output end of the power motor 10 is fixedly connected to the connecting plate 9, and the output shaft of the power motor 10 is coaxial with the hollow shaft 3.

[0038] After the power motor 10 starts, it drives the coaxial connecting plate 9 to rotate, which in turn pulls the hollow shaft 3 to rotate synchronously. The shaft frame 7 and the inner side wall of the housing 2 respectively form rotational support for both ends of the hollow shaft 3, ensuring its rotational stability. The external airflow enters the inner cavity of the housing 2 from the air inlet 6 under the action of the rotating blades 4, and is discharged directionally from the air outlet 8 after being pushed and guided by the blades 4. The shaft frame 7 and the housing 2 provide stable coaxial rotational support for the hollow shaft 3 to avoid rotational deviation. The power motor 10 provides rotational power to the hollow shaft 3 and the blades 4 through the connecting plate 9, and the coaxial arrangement ensures efficient power transmission and reduces rotational loss. The air inlet 6 and the air outlet 8 constitute the airflow inlet and outlet channels of the fan, realizing the directional intake and exhaust of airflow, and providing basic structural and power support for the fan to deliver air.

[0039] In practical use, the working principle of this invention is as follows:

[0040] When the device is started, the power is first turned on to make the motor 10 work, which drives the connecting plate 9 to rotate. The connecting plate 9 then drives the hollow shaft 3 to rotate synchronously. As the hollow shaft 3 rotates, the blades 4 set on it generate a high-speed rotation effect. Under the combined action of negative pressure suction and rotational centrifugal force, the external airflow is efficiently drawn into the device through the air inlet 6. After flowing through the flow channel area of ​​the blades 4, it is finally discharged directionally and accelerated from the air outlet 8 under the pushing and guiding of the blades 4, forming a continuous airflow.

[0041] When the angle of attack of blade 4 needs to be dynamically adjusted according to operating conditions or environmental parameters to optimize wind energy utilization efficiency or wind pressure output, servo motor 52 (a model with a power-off self-locking function and a built-in independent power supply module is selected to eliminate the installation and wiring limitations caused by external wires) is triggered and started. The output shaft of servo motor 52 directly drives air pipe 51 to perform precise rotational movement. The torque of air pipe 51 is transmitted to adjusting rod 54, causing it to rotate synchronously. During the rotation of adjusting rod 54, it drives linkage rod 56 to rotate synchronously. The rotation of linkage rod 56 further drives rectangular block 57 to deflect around its rotation center. During the rotational displacement of rectangular block 57, its connecting joint with blade 4 generates relative movement, forcing blade 4 to deflect around the fixed rotating head axis, thereby completing the precise adaptive adjustment of the tilt angle of blade 4.

[0042] When the tilt angle of blade 4 is adjusted to the optimal value for the corresponding working condition, the operator can selectively inflate or deflate the internal cavity of the multi-section pneumatic telescopic rod 55 by controlling the integrated suction pump 59 (the multi-section pneumatic telescopic rod is selected according to the actual blade size, and the following types can be selected: SMC micro multi-section needle-type pneumatic telescopic rod with self-locking). During inflation, the telescopic rod segments extend step by step under the drive of air pressure; during deflation, they retract step by step under the action of internal restoring force. During this length adjustment process, the telescopic end of the multi-section pneumatic telescopic rod 55 drives the linkage rod 56 and the rectangular block 57 to make a smooth linear displacement along the mother plate 41. At the same time, the inclined push groove 11 opened on the rectangular block 57 matches the inclined side of the inclined sub-plate 44. As the rectangular block 57 slides, the inclined surface of the inclined push groove 11 applies a lateral component force to the inclined sub-plate 44, driving the sub-plate to extend and retract into the receiving groove 42 along the groove direction of the mother plate 41. By precisely controlling the extension and retraction of the telescopic rod, the area ratio of the inclined sub-blade 44 extending into the working area can be accurately adjusted, thereby achieving dynamic adjustment of the overall effective windward area of ​​the blade 4, enabling the device to better adapt to changing actual operating conditions and performance requirements.

[0043] After the device has been running continuously for a long time, a large amount of dust and particulate matter will adhere to the windward surface of blade 4. The operator controls the suction pump 59 to make the multi-section pneumatic telescopic rod 55 repeatedly go through the "inflation-deflation" cycle. This cycle drives the rectangular block 57 to slide back and forth on the mother plate 41: when the rectangular block 57 moves towards the inclined sub-plate 44 and applies pressure, it firmly presses the sub-plate into the receiving groove 42; when the rectangular block 57 moves away from the pressing area of ​​the inclined sub-plate 44, the telescopic spring 43 located inside the receiving groove 42 releases elastic potential energy, pushing the inclined sub-plate 44 to pop out and reset to the sides of the mother plate 41.

[0044] During the repeated extension and retraction of the inclined blade 44 into and out of the receiving groove 42, the relative friction between its sidewall and the groove opening effectively scrapes away the dust adhering to its own surface. At the same time, as the rectangular block 57 moves synchronously and repeatedly along the mother blade 41, the rectangular block 57 will slide relative to the surface of the mother blade 41, which can effectively scrape and clean the adhering dust, thereby achieving self-cleaning maintenance of the blade 4 and ensuring that the aerodynamic characteristics of the blade 4 are maintained at an excellent level for a long time.

[0045] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An energy-saving fan with mechanically adjustable impeller blade angle, comprising a frame (1), wherein a housing (2) is fixedly mounted on the frame (1), and a hollow shaft (3) is provided in the inner cavity of the housing (2), wherein a plurality of blades (4) are rotatably connected to the hollow shaft (3) via a rotating seat, the number of blades (4) being plurality, characterized in that: The hollow shaft (3) is equipped with a blade angle adjustment component (5). The blade angle adjustment assembly (5) includes an air pipe (51) mounted on the inner cavity of a hollow shaft (3) via a bearing. A servo motor (52) is provided at one end of the air pipe (51). The output end of the servo motor (52) is fixedly connected to the air pipe (51), and the servo motor (52) is fixedly mounted on the inner cavity of the hollow shaft (3). Several angle adjustment slots (53) are evenly distributed circumferentially on the hollow shaft (3). Several adjustment rods (54) are fixedly installed on the outside of the air pipe (51). The adjustment rods (54) correspond to the angle adjustment slots (53) one by one. The corresponding adjustment rod (54) passes through the corresponding angle adjustment groove (53). The inner cavity of the adjustment rod (54) is fixedly installed with multiple pneumatic telescopic rods (55). The multiple pneumatic telescopic rods (55) are connected to the inner cavity of the air pipe (51). The telescopic end of the multiple pneumatic telescopic rods (55) is fixedly installed with a linkage rod (56). The linkage rod (56) is slidably engaged with the adjustment rod (54). A rectangular block (57) is fixedly installed on the linkage rod (56). The rectangular block (57) is slidably adapted to the blade (4) and is used to drive the blade (4) to deflect around the rotating seat.

2. The energy-saving fan with mechanically adjustable impeller blade angle according to claim 1, characterized in that: The other end of the air pipe (51) away from the servo motor (52) is fixedly connected to a suction pump (58). The suction end of the suction pump (58) is fixedly connected to the air pipe (51). The suction pump (58) is located in the inner cavity of the hollow shaft (3). Both ends of the hollow shaft (3) are set as open structures.

3. The energy-saving fan with mechanically adjustable impeller blade angle according to claim 1, characterized in that: The blade (4) includes a mother plate (41), which is rotatably connected to the hollow shaft (3) via a rotating seat. The mother plate (41) has receiving grooves (42) on both the left and right sides inside. Each receiving groove (42) has a telescopic spring (43) fixedly installed in its inner cavity. A beveled sub-plate (44) is fixedly installed at the end of the telescopic spring (43) away from the bottom of the receiving groove (42). The beveled sub-plate (44) slides with the receiving groove (42) and can be completely stored in the receiving groove (42).

4. The energy-saving fan with mechanically adjustable impeller blade angle according to claim 3, characterized in that: The inner cavity of the rectangular block (57) is provided with a sloping push groove (11), the sloping angle of the sloping push groove (11) matches the sloping angle of the sloping side piece (44), and the volume of the receiving groove (42) is greater than the volume of the sloping side piece (44).

5. The energy-saving fan with mechanically adjustable impeller blade angle according to claim 1, characterized in that: The front of the housing (2) is provided with an air inlet (6). A shaft bracket (7) is fixedly installed on the housing (2) at the position corresponding to the air inlet (6). One end of the hollow shaft (3) is rotatably engaged with the shaft bracket (7), and the other end of the hollow shaft (3) is rotatably engaged with the inner wall of the housing (2). An air outlet (8) communicating with the inner cavity is provided on the side of the housing (2).

6. The energy-saving fan with mechanically adjustable impeller blade angle according to claim 1, characterized in that: A connecting plate (9) is fixedly installed in the inner cavity of the hollow shaft (3) away from the shaft frame (7). The connecting plate (9) is coaxially arranged with the hollow shaft (3). A power motor (10) is fixedly installed on the outer side of the frame (1). The output end of the power motor (10) is fixedly connected to the connecting plate (9), and the output shaft of the power motor (10) is coaxially arranged with the hollow shaft (3).

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