A new type of automatic overall dust cleaning impeller

Abstract

The application discloses a novel automatic full-dust-cleaning impeller, which comprises a front disc, a middle disc and a plurality of blades which are arranged in a circumferential direction and are arranged between the front disc and the middle disc, a hub assembly is arranged in the middle of the middle disc, a plurality of axial spoiler pipes are arranged in a radial direction on the back of each blade, a plurality of radial nozzles which are used for spraying against the back of the blade are arranged in an axial direction on the side of each axial spoiler pipe which faces the outer periphery of the impeller, a plurality of radial air inlet pipes are arranged on the inner surface of the front disc, each blade corresponds to a radial air inlet pipe, each radial air inlet pipe and the plurality of axial spoiler pipes on the blade corresponding to the radial air inlet pipe are in communication, each radial air inlet pipe has a high-pressure air inlet which extends out of the outer surface of the front disc, a plurality of axial nozzles which are used for spraying against the joint of the axial spoiler pipe and the back of the blade are arranged in a radial direction on each radial air inlet pipe, and high-pressure gas which enters the high-pressure air inlet is sprayed out through the axial nozzles and the radial nozzles.

Description

A new type of automatic full-body cleaning impeller Technical Field

[0001] This invention relates to the field of mechanical ventilation equipment technology, and in particular to a novel automatic full-cleaning impeller. Background Technology

[0002] Centrifugal fans are general-purpose mechanical devices used for air supply or exhaust, and they are widely used in various industries such as steel, cement, and chemicals. The impeller of a centrifugal fan is the heart of the fan. In some cases, the impeller transports dust-laden gas, as shown in Figure 1. Current impellers lack a dust-cleaning structure, and after a period of operation, dust accumulates on the impeller blades. Over time, the dust layer thickens, increasing the impeller's safety. In severe cases, some dust may detach, causing increased fan vibration, which is a major headache for customers. Therefore, improving the impeller's resistance to dust accumulation is urgent and important.

[0003] Currently, a Chinese patent with authorization announcement number CN2679404Y discloses a blade that prevents dust accumulation and scaling. Although this patent can carry away dust from the blade with airflow, the direction of the airflow that carries away the dust is not the same as that that carries away dust from the back of the blade. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings and defects of the prior art by providing a novel automatic full-range dust removal impeller to solve the above-mentioned problems.

[0005] The technical problem solved by this invention can be achieved by the following technical solutions:

[0006] A novel automatic full-range cleaning impeller includes a front disc, a middle disc, and a plurality of blades circumferentially spaced between the front disc and the middle disc. A hub assembly is provided in the center of the middle disc. The impeller is characterized by a plurality of axial baffles spaced radially on the back of each blade, and a plurality of radial nozzles spaced axially on the side of each axial baffle facing the outer periphery of the impeller, which are directed towards the back of the blade. A plurality of radial air inlets are provided on the inner surface of the front disc, with each blade corresponding to one radial air inlet. Each radial air inlet and the plurality of axial baffles on its corresponding blade are interconnected. Each radial air inlet has a high-pressure air inlet extending out of the outer surface of the front disc. Each radial air inlet has a plurality of axial nozzles spaced radially at the junction of the axial baffles and the back of the blade. High-pressure gas entering from the high-pressure air inlet is ejected through the axial nozzles and radial nozzles.

[0007] In a preferred embodiment of the present invention, a filter screen is provided on the high-pressure air inlet.

[0008] In a preferred embodiment of the present invention, the high-pressure air inlet is configured as a flared structure.

[0009] In a preferred embodiment of the present invention, the outlet direction of the axial nozzle is configured as a constricted structure.

[0010] In a preferred embodiment of the present invention, the outlet direction of the radial nozzle is configured as a constricted structure.

[0011] In a preferred embodiment of the present invention, the axial flow-dispersing tube is a round tube, a trapezoidal tube, a square tube, or a triangular tube.

[0012] In a preferred embodiment of the present invention, the hub assembly located inside the impeller is provided with a conical guide shroud, so that the gas entering from the impeller inlet can be guided to the blades, avoiding the gas from directly impacting the impeller disc.

[0013] In a preferred embodiment of the present invention, an impeller positioning plate is provided on the hub assembly by means of fasteners.

[0014] In a preferred embodiment of the present invention, the radial intake pipe is fixed on the inner surface of the front disc, and the radial intake pipe is provided with a plurality of insertion holes at intervals along its length. One end of the axial spoiler pipe is connected to the insertion holes, and the other end is connected to the middle disc.

[0015] In a preferred embodiment of the present invention, a pipe plug is provided at the other end of the axial flow deflector connected to the central plate.

[0016] By employing the above technical solution, this invention, through the installation of an axial baffle tube on the back of the blades, creates airflow turbulence as gas enters and passes through the tube. This alters the airflow pattern on the back of the blades, causing airflow and dust to move away from the blade back, thus improving the impeller's dust accumulation problem. Furthermore, high-pressure gas from outside the impeller enters through the high-pressure inlet and is ejected through axial and radial nozzles, blowing away all dust from the back of the blades, achieving comprehensive automatic blade cleaning without requiring external power or equipment. This invention reduces the frequency of downtime caused by impeller dust accumulation, stabilizes impeller vibration, increases the safety of fan operation, extends impeller lifespan, saves energy, and reduces the cost of using the fan for businesses. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the structure of an impeller in the prior art.

[0019] Figure 2 is a schematic diagram of an embodiment of the present invention.

[0020] Figure 3 is an enlarged view of point I in Figure 2.

[0021] Figure 4 is a side view of Figure 2 (front disc omitted).

[0022] Figure 5 is a schematic diagram of the dust accumulation dead corner in Figure 2.

[0023] Figure 6 is a magnified view of section I in Figure 5.

[0024] Figure 7 is a schematic diagram of the airflow direction when Figure 2 is in operation.

[0025] Figure 8 is an enlarged view of point I in Figure 7.

[0026] Figure 9 is a three-dimensional structural view of an embodiment of the present invention.

[0027] Figure 10 is a structural diagram of Figure 9 with the front plate omitted.

[0028] Figure 11 is a magnified view of a portion of Figure 10. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention is further described below.

[0030] Referring to Figures 2 to 11, a novel automatic full-range cleaning impeller includes a front disc 100, a middle disc 200, and several blades 300 circumferentially spaced between the front disc 100 and the middle disc 200. A hub assembly 400 is located in the middle of the middle disc 200 and is mounted thereon by fasteners 410. An impeller positioning plate 420 is mounted on the hub assembly 400 by fasteners 430. A conical guide shroud 440 is provided at the end of the hub assembly 400 facing the air inlet, so that the gas entering from the impeller air inlet can be guided to the blades 300, avoiding direct frontal impact of the gas on the impeller middle disc 200.

[0031] Each blade 300 has a plurality of axial baffles 500 spaced radially on its back surface 301. Each axial baffle 500 has a plurality of radial nozzles 510 spaced axially on its side facing the outer periphery of the impeller. In this embodiment, the outlet direction of the radial nozzles 510 is set as a constriction structure 511, which is beneficial to increasing the gas ejection pressure. The axial baffles 500 can be a round tube, a trapezoidal tube, a square tube, or a triangular tube. In this embodiment, the axial baffles 500 is a round tube.

[0032] The inner surface 101 of the front disc 100 is provided with a plurality of radial intake pipes 600, each blade 300 corresponding to a radial intake pipe 600, and each radial intake pipe 600 and the corresponding blade 300 having a plurality of axial spoiler pipes 500 connected. Preferably, the radial intake pipes 600 are welded and fixed to the inner surface 101 of the front disc 100, and the radial intake pipes 600 are provided with a plurality of insertion holes 601 at intervals along the length direction. One end 501 of the axial spoiler pipe 500 is sealed and welded to the insertion hole 601, and the other end 502 is welded and fixed to the hole 201 on the middle disc 200. The other end 502 of the axial spoiler pipe 500 connected to the middle disc 200 is provided with a pipe plug 503. Each radial intake pipe 600 has a high-pressure intake port 610 extending from the outer surface 102 of the front disc 100. Each radial intake pipe 600 is provided with a plurality of axial nozzles 620 spaced apart in the radial direction to face the junction L of the axial spoiler pipe 500 and the back surface 301 of the blade. The high-pressure gas entering from the high-pressure intake port 610 is ejected through the axial nozzles 620 and the radial nozzles 510. The outlet direction of the axial nozzles 620 is set with a constriction structure 621, which is beneficial to increase the gas ejection pressure.

[0033] In this embodiment, a filter screen 611 is provided on the high-pressure air inlet 610 to prevent foreign objects from entering the axial baffle pipe 500 and the radial air inlet pipe 600. The high-pressure air inlet 610 is designed with a flared structure to facilitate air intake.

[0034] The working principle of this invention is as follows:

[0035] When the fan is running, the outer periphery of the impeller front plate 100 is a high-pressure zone, and the back surface of the blades 300 is a low-pressure zone, as shown in Figures 7 and 8. When the impeller rotates, the gas inside the impeller enters the back surface of the blades and passes through the axial baffle 500, generating airflow turbulence. This changes the airflow state on the back surface of the blades, causing airflow and dust to move away from the back surface of the blades 301, thus improving the dust accumulation problem on the impeller. Furthermore, high-pressure gas from outside the impeller enters through the high-pressure inlet 610 and exits through the axial nozzle 620 and radial nozzle 510. The airflow from the radial nozzle 510 further cleans the dust on the back surface of the blades 300, while the airflow from the axial nozzle 620 cleans any dust that may be present at the junction L of the axial baffle 500 and the back surface of the blades. Under the dual cleaning action of the axial nozzle 620 and the radial nozzle 510, all the dust on the back surface of the blades 301 is blown away, achieving comprehensive automatic cleaning of the blades without the need for external power or equipment. This invention reduces the frequency of downtime caused by impeller dust accumulation, stabilizes impeller vibration, increases the safety of fan operation, extends impeller lifespan, saves energy, and reduces the cost of using fans for enterprises.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A novel automatic full-range dust removal impeller, comprising a front disc, a middle disc, and a plurality of blades circumferentially spaced between the front disc and the middle disc, wherein a hub assembly is disposed in the center of the middle disc, characterized in that, Each blade has a plurality of axial baffles spaced radially on its back side. Each axial baffle has a plurality of radial nozzles spaced radially on the side facing the outer periphery of the impeller. The inner surface of the front disc has a plurality of radial intake pipes. Each blade corresponds to a radial intake pipe. Each radial intake pipe is connected to the plurality of axial baffles on its corresponding blade. Each radial intake pipe has a high-pressure intake port extending out of the outer surface of the front disc. Each radial intake pipe has a plurality of axial nozzles spaced radially on its back side at the junction of the axial baffles and the back side of the blade. High-pressure gas entering from the high-pressure intake port is ejected through the axial nozzles and radial nozzles.

2. The novel automatic full-body cleaning impeller as described in claim 1, characterized in that, A filter screen is installed on the high-pressure air inlet.

3. The novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The high-pressure air inlet is configured as a flared structure.

4. The novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The outlet direction of the axial nozzle is configured as a constricted structure.

5. A novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The outlet direction of the radial nozzle is configured as a constricted structure.

6. A novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The axial flow-dispersing tube is a round tube, a trapezoidal tube, a square tube, or a triangular tube.

7. A novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The hub assembly located inside the impeller is equipped with a conical guide shroud, which allows the gas entering from the impeller inlet to be guided onto the blades, preventing the gas from directly impacting the impeller disc.

8. A novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The hub assembly is equipped with an impeller positioning plate via fasteners.

9. A novel automatic full-body cleaning impeller as described in claim 1, characterized in that, The radial intake pipe is fixed on the inner surface of the front disc. The radial intake pipe has several insertion holes spaced apart along its length. One end of the axial spoiler pipe is connected to the insertion hole, and the other end is connected to the middle disc.

10. A novel automatic full-body cleaning impeller as described in claim 9, characterized in that, A plug is provided at the other end of the axial flow-dispersing pipe that connects to the central plate.

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