Impeller structure of efficient single-suction centrifugal fan

Abstract

The impeller structure of the efficient single-suction centrifugal fan comprises a rear disc, fixing plates are fixedly connected to the top of the rear disc at the same 90-degree angle, a front disc is fixedly connected between the tops of the four fixing plates, two rotating shafts are rotationally connected between the top of the rear disc and the front disc and located between every two adjacent fixing plates, and the two rotating shafts are connected with the rear disc. And one side of each rotating shaft is fixedly connected with a fan blade. The impeller structure of the efficient single-suction centrifugal fan has the effect of adjusting the angle of the fan blades, the fan blades can rotate only through the adjusting assembly, the angle between the fan blades is increased, the contact area of the fan blades and airflow is increased, the strength of the airflow generated by the impeller is effectively improved, and the service life of the impeller is prolonged. And the working efficiency is improved, and actual application and operation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fan impellers, in particular to an impeller structure of an efficient single-suction centrifugal fan. Background Technique

[0002] A centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine and is widely used in industry. However, the existing impellers still have the problem of low working efficiency when in use.

[0003] After retrieval, a Chinese patent discloses an impeller of an efficient single-suction centrifugal fan (authorized announcement number CN212563775), which includes a mounting plate. An installation frame is fixedly installed on the mounting plate. A connecting column is fixedly installed on one side of the mounting plate. A plurality of blades are fixedly installed on the connecting column. One side of the installation frame is fixedly connected with an anti-corrosion layer, and one side of the anti-corrosion layer is fixedly connected with a fireproof layer. The other side of the installation frame is fixedly connected with a first wear-resistant layer, and one side of the first wear-resistant layer is fixedly connected with a first rust-proof layer. One side of the blade is fixedly connected with a high-temperature resistant layer, and one side of the high-temperature resistant layer is fixedly connected with a waterproof layer. Although the structure of this patent is reasonable and the operation is convenient, the impeller of this centrifugal fan has a good anti-corrosion effect, a long service life, and a good wear-resistant effect on the impeller surface;

[0004] However, in the actual application process, the existing impeller blades are generally fixed by welding and cannot be adjusted. The generated air volume is also fixed and cannot be adjusted according to the actual use situation. Therefore, in order to ensure the normal needs of the fan, an impeller with a rated air volume exceeding the rated value is often selected. However, this will reduce the use efficiency of the fan and consume more electric energy, which is not conducive to actual application and operation. Summary of the Utility Model

[0005] The utility model discloses an impeller structure of an efficient single-suction centrifugal fan to solve the technical problems in the background technique.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An impeller structure of an efficient single-suction centrifugal fan includes a rear disc. Fixing plates are fixedly connected to the top of the rear disc at equal 90-degree angles. A front disc is fixedly connected between the tops of the four fixing plates. Two rotating shafts are rotatably connected between the top of the rear disc and the front disc and between adjacent two fixing plates. A fan blade is fixedly connected to one side of each rotating shaft;

[0008] An adjusting assembly is arranged inside the rear disc, and the adjusting assembly is used to adjust the angle of the fan blades.

[0009] The impeller is installed in a specified machine through a fixed hole. When the rotating wind force is small, the angle of the fan blades is adjusted by an adjustment component, so that the air outlet area formed by the fan blades relative to another fan blade is increased. After adjusting it to a suitable position, the device only needs to use the adjustment component to make the fan blades rotate, so that the angle between the fan blades is increased, and the area of contact with the air flow is increased, thereby effectively increasing the air flow intensity generated by the impeller, improving work efficiency, and being beneficial to practical application and operation.

[0010] In a preferred solution, the adjustment component includes a first gear, a second gear, a connecting rod, a tooth groove, a rotating shaft, a sliding groove and a slider. The tooth groove is opened inside the rear disk. The second gear is rotatably connected to the bottom of the inner wall of the tooth groove. The sliding grooves are equally angularly opened at the top of the rear disk and the bottom of the front disk. The sliders are all slidably connected to the inner walls of the sliding grooves. The connecting rods are all slidably connected between the two sliders. The connecting rods are fixedly connected to the corresponding fan blades. The first gears are all fixedly connected to the bottom of the rotating shaft and are located inside the tooth groove. The first gears are all meshed with the second gears.

[0011] By setting: the second gear rotates, and at the same time the first gear rotates. The first gear drives the rotating shaft to rotate. The rotating direction is limited by the cooperation of the sliding rod and the slider with the sliding groove, so that the distance between the two fan blades is increased.

[0012] In a preferred solution, a rotating block is fixedly connected to the top of the second gear. Through grooves are opened on both sides of the top of the rotating block. The top of the rotating block extends to the top of the rear disk and is rotatably connected to it. A fixing groove is opened at the top of the rotating block and extends to the bottom of the tooth groove. Threads are provided on the inner wall of the fixing groove. A screw rod is threadedly connected to the inner wall of the fixing groove.

[0013] By setting, the rotating block is fixed by using the threaded fixing groove in cooperation with the screw rod. The rotating block drives the second gear to rotate. The through grooves facilitate the operator to rotate the rotating block.

[0014] In a preferred solution, anti-corrosion coatings and high-temperature resistant coatings are applied to the outer sides of the rear disk, the front disk and the fan blades.

[0015] By setting, the anti-corrosion performance of the impeller is increased by using the anti-corrosion coating, and the impeller is prevented from being damaged due to heat transfer from the motor to the impeller during long-term operation by using the high-temperature resistant coating.

[0016] In a preferred solution, the outer side of the fan blade is arc-shaped and spiral-shaped, and the sliding groove is arc-shaped.

[0017] By setting, the arc-shaped sliding groove makes it convenient for the fan blade to move when rotating. The fan blade being spiral-shaped and having an arc-shaped edge is beneficial for guiding the air flow.

[0018] In a preferred embodiment, fixing holes are equiangularly formed at the bottom of the rear disc, and the fixing holes are fixedly connected to an external transmission structure.

[0019] By arranging to utilize the fixing holes to cooperate with an external fixing structure, the impeller is driven to rotate by a transmission device.

[0020] The impeller structure of the high-efficiency single-suction centrifugal fan provided by the present utility model has the following advantages:

[0021] In this equipment, the impeller is installed in a designated machine through the fixing holes. When the rotating wind force is small, the angle of the fan blades is adjusted by an adjusting component, so that the air outlet area formed by the fan blades relative to another fan blade is increased. After adjusting it to a suitable position, the device only needs to pass through the adjusting component, so that the fan blades can rotate, thereby increasing the angle between the fan blades, increasing the area of contact with the air flow, effectively increasing the air flow intensity generated by the impeller, improving the working efficiency, and being beneficial to practical application and operation. Description of the Drawings

[0022] Figure 1 It is a first-perspective three-dimensional schematic diagram of the impeller structure of a high-efficiency single-suction centrifugal fan proposed by the present utility model.

[0023] Figure 2 It is a second-perspective three-dimensional schematic diagram of the impeller structure of a high-efficiency single-suction centrifugal fan proposed by the present utility model.

[0024] Figure 3 It is a front-view sectional schematic diagram of the impeller structure of a high-efficiency single-suction centrifugal fan proposed by the present utility model.

[0025] Figure 4 It is a schematic diagram of the front disc structure of the impeller structure of a high-efficiency single-suction centrifugal fan proposed by the present utility model;

[0026] Figure 5 It is a schematic diagram of the rear disc and gear structure of the impeller structure of a high-efficiency single-suction centrifugal fan proposed by the present utility model.

[0027] In the drawings: 1, rear disc; 2, front disc; 3, fixing plate; 4, fan blade; 5, rotating block; 6, through groove; 7, screw; 8, fixing hole; 9, slider; 10, chute; 11, rotating shaft; 12, first gear; 13, second gear; 14, tooth groove; 15, fixing groove; 16, connecting rod. Detailed Embodiments

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0029] What kind of scenarios is the impeller structure of an efficient single-suction centrifugal fan disclosed in the present utility model mainly applied to?

[0030] Refer to Figure 1 and Figure 2 As shown in and, an impeller structure of an efficient single-suction centrifugal fan includes a rear disk 1. Fixing plates 3 are fixedly connected to the top of the rear disk 1 at equal 90-degree angles. A front disk 2 is fixedly connected between the tops of the four fixing plates 3. Two rotating shafts 11 are rotatably connected between the top of the rear disk 1 and the front disk 2 and between adjacent two fixing plates 3. A fan blade 4 is fixedly connected to one side of each rotating shaft 11.

[0031] An adjusting assembly is arranged inside the rear disk 1, and the adjusting assembly is used to adjust the angle of the fan blades 4.

[0032] In this embodiment: The impeller is installed in a designated machine through the fixing holes 8. When the rotating wind force is small, the adjusting assembly is used to adjust the angle of the fan blades 4, so that the air outlet area formed by the fan blade 4 relative to another fan blade 4 is increased. After adjusting it to a suitable position, the device only needs to use the adjusting assembly to make the fan blades 4 rotatable, so that the angle between the fan blades 4 is increased, and the area of its contact with the air flow is increased, thereby effectively increasing the air flow intensity generated by the impeller and improving the working efficiency, which is beneficial to practical application and operation.

[0033] Refer to Figure 1 and Figure 4 As shown in and, in a preferred embodiment, the adjusting assembly includes a first gear 12, a second gear 13, a connecting rod 16, a tooth groove 14, a rotating shaft 11, a sliding groove 10 and a sliding block 9. The tooth groove 14 is opened inside the rear disk 1. The second gear 13 is rotatably connected to the bottom of the inner wall of the tooth groove 14. The sliding grooves 10 are equally angularly opened at the top of the rear disk 1 and the bottom of the front disk 2. The sliding blocks 9 are all slidably connected to the inner walls of the sliding grooves 10. The connecting rods 16 are all slidably connected between the two sliding blocks 9. The connecting rods 16 are fixedly connected to the corresponding fan blades 4. The first gears 12 are all fixedly connected to the bottoms of the rotating shafts 11 and are located inside the tooth groove 14. The first gears 12 are all meshed with the second gear 13.

[0034] In this embodiment: The second gear 13 rotates, and at the same time, the first gear 12 rotates. The rotation of the first gear 12 drives the rotating shaft 11 to rotate. The cooperation of the sliding rod and the slider 9 with the sliding groove 10 limits the rotation direction, so that the distance between the two fan blades 4 increases.

[0035] Refer to Figure 1 and Figure 3 In a preferred embodiment, a rotating block 5 is fixedly connected to the top of the second gear 13. Through grooves 6 are formed on both sides of the top of the rotating block 5. The top of the rotating block 5 extends to the top of the rear disk 1 and is rotatably connected thereto. A fixing groove 15 is formed at the bottom of the top of the rotating block 5 extending into the tooth groove 14. The inner wall of the fixing groove 15 is provided with threads, and a screw rod 7 is threadedly connected to the inner wall of the fixing groove 15.

[0036] In this embodiment: The fixing groove 15 with threads cooperates with the screw rod 7 to fix the rotating block 5. The rotating block 5 drives the second gear 13 to rotate. The through grooves 6 facilitate the operator to rotate the rotating block 5.

[0037] Refer to Figure 1 and Figure 3 In a preferred embodiment, anti-corrosion coatings and high-temperature resistant coatings are applied to the outer sides of the rear disk 1, the front disk 2, and the fan blades 4.

[0038] In this embodiment: The anti-corrosion coating is used to increase the corrosion resistance of the impeller, and the high-temperature resistant coating is used to prevent the motor from transferring heat to the impeller during long-term operation.

[0039] Refer to Figure 1 and Figure 4 In a preferred embodiment, the outer sides of the fan blades 4 are arc-shaped and spiral-shaped, and the sliding groove 10 is arc-shaped.

[0040] In this embodiment: The arc-shaped sliding groove 10 facilitates the movement of the fan blades 4 during rotation. The fan blades 4 being spiral-shaped and having arc-shaped edges is beneficial for guiding the airflow.

[0041] Refer to Figure 2 In a preferred embodiment, fixing holes 8 are equiangularly formed at the bottom of the rear disk 1, and the fixing holes 8 are fixedly connected to an external transmission structure.

[0042] In this embodiment: The fixing holes 8 cooperate with an external fixing structure to enable the impeller to be driven to rotate by a transmission device.

[0043] Working principle: When in use, the impeller is installed in the designated machine through the fixing hole 8. When the rotating wind force is small, the rotating screw 7 reduces the pressure and friction force between it and the rotating block 5, applies a rotating force through the through groove 6, and the rotating block 5 starts to rotate. The rotating block 5 drives the second gear 13 to rotate, the second gear 13 drives the first gear 12 to rotate, the first gear 12 drives the rotating shaft 11 to rotate, and the sliding rod and the slider 9 slide inside the chute 10. The air outlet area formed by one side of the fan blade 4 relative to the other fan blade 4 is increased. Adjust it to a suitable position, and then rotate the screw 7 again to fix the rotating block 5. This device only needs to adjust the components so that the fan blades 4 can rotate, so that the angle between the fan blades 4 is increased, and the area of contact with the air flow is increased, thus effectively increasing the air flow intensity generated by the impeller, improving the work efficiency, and being beneficial to practical application and operation.

[0044] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be the substitution of part of the structure, device, and method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and the inventive concept thereof shall be covered by the protection scope of the present invention.

Claims

1. An impeller structure of a high-efficiency single-suction centrifugal fan, comprising a rear disc (1), characterized in that: The top of the rear disk (1) is fixedly connected to a fixed plate (3) at an angle of ninety degrees, the tops of the four fixed plates (3) are fixedly connected to the front disk (2), and two rotating shafts (11) are rotatably connected between the top of the rear disk (1) and the front disk (2) and between two adjacent fixed plates (3), and a fan blade (4) is fixedly connected to one side of the rotating shaft (11); An adjustment component is arranged inside the rear disc (1), and the adjustment component is used to adjust the angle of the fan blade (4).

2. The impeller structure of a high-efficiency single-suction centrifugal fan according to claim 1 is characterized in that: The adjustment assembly comprises a first gear (12), a second gear (13), a connecting rod (16), a tooth groove (14), a rotating shaft (11), a slide groove (10) and a slider (9); the tooth groove (14) is opened inside the rear disc (1); the second gear (13) is rotatably connected to the bottom of the inner wall of the tooth groove (14); the slide groove (10) is opened at an equal angle at the top of the rear disc (1) and the bottom of the front disc (2); the sliders (9) are slidably connected to the inner wall of the slide groove (10); the connecting rod (16) is slidably connected between the two sliders (9); the connecting rod (16) is fixedly connected to the corresponding fan blade (4); the first gear (12) is fixedly connected to the bottom of the rotating shaft (11) and is located inside the tooth groove (14); the first gear (12) is meshedly connected to the second gear (13).

3. The impeller structure of a high-efficiency single-suction centrifugal fan according to claim 2 is characterized in that: The top of the second gear (13) is fixedly connected to a rotating block (5), both sides of the top of the rotating block (5) are provided with through grooves (6), the top of the rotating block (5) extends to the top of the rear disc (1) and is rotatably connected thereto, the top of the rotating block (5) and the bottom of the tooth groove (14) are provided with a fixing groove (15), the inner wall of the fixing groove (15) is provided with a thread, and the inner wall of the fixing groove (15) is threadedly connected to a screw rod (7).

4. The impeller structure of a high-efficiency single-suction centrifugal fan according to claim 1 is characterized in that: The outer sides of the rear disc (1), the front disc (2) and the fan blades (4) are all coated with an anti-corrosion coating and a high-temperature resistant coating.

5. The impeller structure of a high-efficiency single-suction centrifugal fan according to claim 2, characterized in that: The outer side of the fan blade (4) is arc-shaped and spiral-shaped, and the slide groove (10) is arc-shaped.

6. The impeller structure of a high-efficiency single-suction centrifugal fan according to claim 3, characterized in that: The bottom of the rear disc (1) is provided with fixing holes (8) at equal angles, and the fixing holes (8) are fixedly connected to an external transmission structure.

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