Teflon anti-corrosion impeller and centrifugal fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a Teflon anticorrosion impeller and a centrifugal fan, the Teflon anticorrosion impeller comprises a front disc and a rear disc which are oppositely arranged, and blades of which the two ends are respectively connected to the front disc and the rear disc, a main shaft is arranged at the circle center of the front disc and the rear disc, and the blades comprise wide blades and narrow blades. One side of the middle of the front disc is sunken, a boss formed by the sunken part is arranged on the other side of the front disc, the narrow blades are arranged on the boss, and the wide blades are arranged on the surface, parallel to the boss, of the front disc, so that the blades are divided into the wide blades and the narrow blades, airflow can be gradually accelerated after entering a flow channel, and the airflow can be gradually accelerated after entering the flow channel. Compared with the prior art, the impeller has the advantages that vortex is reduced, operation efficiency of the fan is improved, noise is reduced, the surfaces of the bosses and the blades are coated with the Teflon coatings, corrosion resistance and self-lubricating performance of the impeller are improved, and energy consumption and noise of the fan are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a Teflon anti-corrosion impeller and a centrifugal fan. Background Art

[0002] Centrifugal fans are suitable for various ventilation and cooling systems such as duct fans, cooling fans, purification ventilation, etc. Centrifugal fans include centrifugal impellers and motors that drive the centrifugal impellers to rotate. Today's application scenarios have higher and higher requirements for the air volume and pressure of centrifugal fans. In centrifugal fans, gas can enter the impeller along the axial direction of the impeller. After entering the impeller, the flow direction of the gas can be changed to radial. The velocity of the fluid micro-groups at any position inside the impeller can be decomposed into circumferential velocity, radial velocity and axial velocity. When the speed of the centrifugal fan is constant, the circumferential velocity remains unchanged, and the flow velocity of the fluid inside the impeller can be along the direction of the rotating shaft. At different blade positions, the proportion of the axial flow velocity component and the radial velocity component increases and decreases. The centrifugal fan can use the high-speed rotating impeller to first accelerate the gas, then decelerate, and then change the flow direction, so that the kinetic energy is converted into pressure potential energy.

[0003] In the prior art, an air passage for airflow is formed between two adjacent blades of an impeller. When the impeller of a centrifugal fan rotates, flow separation and a vortex are formed on the suction surface of the blade, causing energy loss, reducing the efficiency of the fan, and generating relatively loud fan noise.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country for those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a Teflon anti-corrosion impeller and a centrifugal fan, the purpose of which is that the technical solution adopted by the utility model is as follows: by dividing the blades into wide blades and narrow blades, the airflow can be gradually accelerated after entering the flow channel, reducing the generation of eddy currents, improving the operating efficiency of the fan and reducing noise, and secondly, coating the surface of the boss and the blades with a Teflon coating, thereby improving the anti-corrosion performance and self-lubricating properties of the impeller and reducing the energy consumption and noise of the fan.

[0006] A Teflon anti-corrosion impeller comprises a front disc and a rear disc arranged opposite to each other, and blades whose two ends are respectively connected to the front disc and the rear disc, a main shaft is arranged at the center of the circle of the front disc and the rear disc, the blades comprise wide blades and narrow blades, a boss is formed by a side of the middle part of the front disc being recessed toward the rear disc, the narrow blades are arranged on the boss, and the wide blades are arranged on the surface of the non-recessed area of ​​the front disc.

[0007] As a preferred technical solution, the boss is circular, wherein an arc-shaped transition surface is provided between the peripheral side of the boss and the inner peripheral side of the non-recessed area of ​​the front disc.

[0008] Furthermore, the wide blade and the narrow blade are located on the same horizontal line on the side facing the rear disc, and the rear disc is attached to the wide blade and the narrow blade.

[0009] Furthermore, the wide blade and the narrow blade are provided with an inclined edge seal on one side facing the front disc, and the edge seal is attached to the arc-shaped transition surface of the boss.

[0010] Furthermore, the blade is provided with an angle a between the centers of the front disk and the rear disk, wherein the angle a is an acute angle.

[0011] A centrifugal fan comprises an impeller and a driving motor connected to a main shaft.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] By dividing the blades into wide blades and narrow blades, the airflow can be gradually accelerated after entering the flow channel, reducing the generation of eddy currents, improving the operating efficiency of the fan and reducing noise. Secondly, Teflon coating is applied on the surface of the boss and blades to improve the corrosion resistance and self-lubrication of the impeller and reduce the energy consumption and noise of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0015] Figure 1 This is a structural schematic diagram of a Teflon anti-corrosion impeller and a centrifugal fan provided by the utility model;

[0016] Figure 2 It is a structural schematic diagram of the flow channel provided by the utility model;

[0017] Figure 3 It is a structural schematic diagram of the blade provided by the utility model;

[0018] Figure 4 It is a schematic diagram of the inner structure of the front disc provided by the utility model.

[0019] Front disc-1; rear disc-2; blade-3; main shaft-4; boss-5; wide blade-6; narrow blade-7; edge sealing-8. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Embodiment 1

[0024] In the prior art, during the operation of a centrifugal fan, the blades on the impeller form airways for airflow between each other to ensure smooth flow of the airflow. However, during the rotation of the impeller, the suction surface of the blade will encounter flow separation, thereby forming a vortex. This phenomenon not only causes a large amount of energy loss, but also directly reduces the overall operating efficiency of the fan. At the same time, due to the generation of vortices, the noise level of the fan is also relatively high.

[0025] Therefore, in order to solve the problem that when the existing impeller is in use, the airflow is easy to form vortices in the flow channel of the impeller, which reduces the operating efficiency of the fan and increases the noise, and realizes the functions of reducing the formation of vortices, improving the efficiency of the fan and reducing the noise, the utility model discloses a Teflon anti-corrosion impeller, referring to Figure 1-Figure 2 , including a front disc 1 and a rear disc 2 which are opposite to each other, and blades 3 whose two ends are connected to the front disc 1 and the rear disc 2 respectively, a main shaft 4 is provided at the center of the circle of the front disc 1 and the rear disc 2, specifically, the blades 3 include a wide blade 6 and a narrow blade 7, a boss 5 is formed by a side of the middle part of the front disc 1 which is recessed toward the rear disc 2, the narrow blade 7 is arranged on the boss 5, and the wide blade 6 is arranged on the surface of the non-recessed area of ​​the front disc 1;

[0026] In this embodiment, see Figure 2By dividing the blades 3 into wide blades 6 and narrow blades 7, when the front disc 1 and the rear disc 2 are closed, the depth of the flow channel close to the main shaft 4 will be shallower than the depth of the flow channel away from the main shaft 4. When the impeller is rotating, the airflow enters the impeller from the position of the main shaft 4, and then the airflow will first enter the shallower flow channel and flow towards the gradually deepening flow channel. Through this setting of narrowing the flow channel first and then widening the flow channel, the airflow can be gradually accelerated after entering the flow channel, reducing the generation of vortexes, thereby improving the operating efficiency of the fan and reducing noise.

[0027] In this embodiment, the blades 3 are arranged in a streamlined shape to reduce resistance during air flow, improve the efficiency of the centrifugal fan and reduce noise.

[0028] In this embodiment, the blades 3 are provided in a strip-shaped sheet structure, and the blades 3 are welded between the front disc 1 and the rear disc 2 .

[0029] In addition, in order to further improve the anti-corrosion performance of the fan, we apply a layer of Teflon coating on the surface of the boss 5 and the blade 3. The Teflon coating has excellent corrosion resistance and wear resistance, and can effectively prevent the impeller from being damaged due to corrosion or wear during long-term operation. At the same time, the Teflon coating also has good self-lubricating properties, which can reduce the friction resistance between the blade 3 and the airflow, and reduce the energy consumption and noise of the fan.

[0030] In this embodiment, see Figure 2 The boss 5 is circular, wherein an arc-shaped transition surface is provided between the circumferential side of the boss 5 and the inner circumferential side of the non-recessed area of ​​the front disc 1. Through this arrangement, the boss 5 can be in a conical structure, so that its two sides can make the airflow in the narrow blade 5 transition more smoothly to the area of ​​the wide blade 6, thereby reducing the disturbance of the airflow in the flow channel and the formation of vortices.

[0031] Furthermore, when the front disc 1 and the rear disc 2 are closed to each other, since the wide blades 6 and the narrow blades 7 are located on the same horizontal line toward the side of the rear disc 2, the rear disc 2 fits on the wide blades 6 and the narrow blades 7, so that the flow channel gradually deepens from the top circle to the bottom circle.

[0032] Furthermore, it can be understood that, since the boss 5 has a conical structure, the straight-line height between its two sides and the rear disc 2 gradually increases as it moves away from the main shaft 4. In this way, the airflow can flow more smoothly from the narrow channel to the wide channel, reducing obstruction to the airflow and further avoiding the occurrence of vortices.

[0033] In this embodiment, see Figure 2-Figure 3The wide blade 6 and the narrow blade 7 are provided with an inclined edge seal 8 on the side facing the front disc 1, and the edge seal 8 is attached to the arc transition surface of the boss 2. Through this arrangement, the connection between the wide blade 6 and the narrow blade 7 and the boss 5 can be made tighter, and the airflow can be prevented from leaking from the connection, thereby improving the operating efficiency of the centrifugal fan and reducing noise. At the same time, the inclined edge seal 8 can also play a role in guiding the airflow, making the airflow flow more stable in the flow channel and reducing the generation of vortices.

[0034] In this embodiment, see Figure 4 The blade 3 is provided with an angle a between the centers of the front disk 1 and the rear disk 2, wherein the angle a is an acute angle, wherein the angle a is preferably 35 degrees. Through this setting, the angle of the flow channel can be further adjusted to better adapt to the flow characteristics of the airflow. Specifically, when the angle a is set to 35 degrees, the inclination of the flow channel is moderate, which can effectively guide the airflow to flow along the surface of the blade 3, reduce the collision and separation of the airflow on the blade 3, thereby reducing the generation of vortices, improving the operating efficiency of the fan and reducing noise.

[0035] In summary, combined with the above scheme, the beneficial effects of the Teflon anti-corrosion impeller are:

[0036] By dividing the blade 3 into a wide blade 6 and a narrow blade 7, and arranging a boss 5 on the front disk 1, the flow channel is shallow at the main shaft 4 and gradually deepens to the edges of the front disk 1 and the rear disk 2. This flow channel design that is narrow at first and wide later can effectively guide the airflow and reduce the generation of vortexes, thereby improving the operating efficiency of the fan and reducing noise; the streamlined structural design of the blade 3 further reduces the resistance during air flow and improves the performance of the fan; Teflon coating is applied on the surface of the boss 5 and the blade 3 to enhance the anti-corrosion performance of the fan, increase the service life of the fan, and reduce the contact between the blade 3 and the fan. The friction resistance between the airflows further reduces energy consumption and noise; the boss 5 is designed as a conical structure, which makes the transition of the airflow in the flow channel smoother and reduces the formation of airflow disturbance and vortex; the inclined setting of the edge seal 8 not only enhances the tightness of the connection between the blade 3 and the boss 5 to prevent airflow leakage, but also plays a role in guiding the airflow to make the airflow flow more stable; by reasonably setting the angle between the front disk 1 and the rear disk 2 of the blade 3, the angle of the flow channel is optimized, so that the flow channel can better adapt to the flow characteristics of the airflow, further reducing the generation of vortex and improving the performance of the fan.

[0037] Embodiment 2

[0038] On the basis of the first embodiment, the utility model further discloses a centrifugal fan, including an impeller and a driving motor connected to the main shaft. Specifically, the impeller adopts the Teflon anti-corrosion impeller described in the first embodiment. In the overall design of the centrifugal fan, the main shaft 4 of the Teflon anti-corrosion impeller is connected to the driving motor, and the impeller is driven to rotate at a high speed by the rotation of the driving motor, thereby realizing the suction and discharge of air.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Teflon anti-corrosion impeller, comprising a front disc (1) and a rear disc (2) arranged opposite to each other, and blades (3) connected at both ends to the front disc (1) and the rear disc (2), respectively, wherein a main shaft (4) is arranged at the center of the front disc (1) and the rear disc (2), characterized in that: The blades (3) include wide blades (6) and narrow blades (7); one side of the middle of the front disc (1) is recessed toward the rear disc (2) to form a boss (5); the narrow blades (7) are arranged on the boss (5); and the wide blades (6) are arranged on the surface of the non-recessed area of ​​the front disc (1).

2. The Teflon anti-corrosion impeller according to claim 1, characterized in that: The boss (5) is circular, wherein an arc-shaped transition surface is provided between the peripheral side of the boss (5) and the inner peripheral side of the non-recessed area of ​​the front disc (1).

3. The Teflon anti-corrosion impeller according to claim 1, characterized in that: The wide blade (6) and the narrow blade (7) are located on the same horizontal line on the side facing the rear disc (2), and the rear disc (2) is attached to the wide blade (6) and the narrow blade (7).

4. The Teflon anti-corrosion impeller according to any one of claims 2 or 3, characterized in that: The wide blade (6) and the narrow blade (7) are provided with an inclined sealing edge (8) on the side facing the front disc (1), and the sealing edge (8) is fitted on the arc-shaped transition surface of the boss (5).

5. The Teflon anti-corrosion impeller according to claim 1, characterized in that: The blades (3) are provided with an angle a between the centers of the front disk (1) and the rear disk (2), wherein the angle a is an acute angle.

6. A centrifugal fan, characterized in that: The invention comprises an impeller according to any one of claims 1 to 5 and a driving motor connected to a main shaft.

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