A fan for a dust cleaning system

Abstract

The application discloses a fan for a dust removal and purification system, which comprises an impeller (21), a diffuser (22) and a volute, the radial outer periphery of the impeller is provided with the diffuser, the diffuser comprises a plurality of first diffuser blades (23) and second diffuser blades (24), the plurality of first diffuser blades and second diffuser blades are arranged in a circumferential staggered manner, and the first diffuser blades and second diffuser blades are arc-shaped blades; characterized in that: the concave arc surface of the first diffuser blade and the radial outer end portion thereof are provided with a first wave-shaped portion (25), and the convex arc surface of the second diffuser blade and the radial inner end portion thereof are provided with a second wave-shaped portion (26). The application can inhibit the flow separation of the surface of the diffuser blade, thereby reducing the pressure and energy loss in the flow passage of the diffuser, reducing the noise of the fan and improving the efficiency of the fan.

Description

Technical Field

[0001] This invention relates to the field of industrial environmental protection dust removal and purification system technology, specifically to a fan used in a dust removal and purification system. Background Technology

[0002] like Figure 1 As shown, the existing dust removal and purification system includes a purification filter device 10, a collection box 11, an air inlet pipe 12, an air outlet pipe 13, a silencer 14, and a centrifugal fan 20. The collection box 11 is installed at the bottom of the purification filter device 10. The inlet end of the centrifugal fan 20 is connected to the purification filter device 10 through the air inlet pipe 12. The outlet end of the centrifugal fan 20 is connected to the air outlet pipe 13, and the silencer 14 is connected to the air outlet pipe 13.

[0003] Centrifugal fans include an impeller, a diffuser, and a volute. The impeller is installed inside the volute and includes multiple circumferentially distributed impeller blades. A diffuser is arranged radially around the outer periphery of the impeller, and the diffuser includes multiple first diffuser blades and second diffuser blades arranged alternately circumferentially. The first and second diffuser blades are arc-shaped. However, existing centrifugal fans still suffer from significant flow separation on the diffuser blade surface, resulting in substantial pressure and energy losses. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fan for a dust removal and purification system. Through the design of the first wave-shaped part and the second wave-shaped part, the fan can suppress the flow separation on the surface of the diffuser blades, thereby reducing the pressure and energy loss in the diffuser channel, thus reducing the noise of the centrifugal fan and improving the efficiency of the centrifugal fan.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A fan for a dust removal and purification system includes an impeller (21), a diffuser (22), and a volute. The impeller is installed inside the volute and includes multiple impeller blades (27) distributed circumferentially. A diffuser is provided on the radial outer periphery of the impeller. The diffuser includes multiple first diffuser blades (23) and second diffuser blades (24). The multiple first diffuser blades and second diffuser blades are staggered circumferentially. The first diffuser blades and second diffuser blades are arc-shaped blades. The first diffuser blade has a concave arc surface and a first wave-shaped part (25) at its radial outer end. The second diffuser blade has a convex arc surface and a second wave-shaped part (26) at its radial inner end.

[0007] Furthermore, a first wave-shaped portion (25) is provided only on the concave arc surface of the first diffuser blade (23) and at its radially outer end, and a second wave-shaped portion (26) is provided only on the convex arc surface of the second diffuser blade (24) and at its radially inner end.

[0008] Furthermore, the first wave-shaped portion (25) flows in a radial direction and terminates at the outlet edge of the first diffuser blade; the second wave-shaped portion (26) flows in a radial direction and begins at the inlet edge of the second diffuser blade 24.

[0009] Furthermore, from the radial inner side to the radial outer side, the depth of the first wave-shaped portion (25) gradually decreases or decreases in a stepwise manner, while the depth of the second wave-shaped portion (26) gradually increases or increases in a stepwise manner.

[0010] Furthermore, the first wavy portion (25) and the second wavy portion (26) have a radial length L, which is 0.20-0.4 times the total radial length of the first diffuser blade (23) or the second diffuser blade (24).

[0011] Furthermore, the inlet edge of the first diffuser blade (23) has a first blade inlet mounting angle a, and the inlet edge of the second diffuser blade (24) has a second blade inlet mounting angle b, a > b, and a = (1.05-1.25)b.

[0012] Furthermore, the fan is a centrifugal fan, which is used in dust removal and purification systems in the environmental protection industry.

[0013] The present invention discloses a fan for a dust removal and purification system, which, through the design of a first wave-shaped section and a second wave-shaped section, can suppress flow separation on the surface of the diffuser blades, thereby reducing pressure and energy loss in the diffuser channel, reducing the noise of the centrifugal fan, and improving the efficiency of the centrifugal fan. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an existing dust removal and purification system;

[0015] Figure 2 This is a partial structural diagram of the fan used in the dust removal and purification system of the present invention;

[0016] Figure 3 This is a partial structural diagram of the fan used in the dust removal and purification system of the present invention.

[0017] In the figure: purification and filtration device 10, collection box 11, air inlet pipe 12, air outlet pipe 13, silencer 14, centrifugal fan 20, impeller 21, diffuser 22, first diffuser blade 23, second diffuser blade 24, first wavy section 25, second wavy section 26, impeller blade 27. Detailed Implementation

[0018] To make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention, and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, only the parts / structures related to the present invention are shown in the accompanying drawings. Other related parts can be referred to with ordinary design. In the absence of conflict, the embodiments and technical features in the embodiments of the present invention can be combined with each other to obtain new embodiments.

[0019] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Furthermore, unless otherwise defined, the technical or scientific terms used in the description of this invention should have the ordinary meaning understood by those skilled in the art.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the existing dust removal and purification system includes a purification filter device 10, a collection box 11, an air inlet pipe 12, an air outlet pipe 13, a silencer 14, and a centrifugal fan 20. The collection box 11 is installed at the bottom of the purification filter device 10. The inlet end of the centrifugal fan 20 is connected to the purification filter device 10 through the air inlet pipe 12. The outlet end of the centrifugal fan 20 is connected to the air outlet pipe 13, and the silencer 14 is connected to the air outlet pipe 13.

[0022] like Figure 2-3 As shown, a fan for a dust removal and purification system includes an impeller 21, a diffuser 22, and a volute. The impeller 21 is installed inside the volute and includes multiple impeller blades 27 distributed circumferentially. A diffuser 22 is arranged on the radial outer periphery of the impeller 21. The diffuser 22 includes multiple first diffuser blades 23 and second diffuser blades 24, which are arranged alternately circumferentially. The first diffuser blades 23 and second diffuser blades 24 are arc-shaped blades. The first diffuser blades 23 and second diffuser blades 24 are characterized by having a first wave-shaped portion 25 on the concave arc surface of the first diffuser blade 23 at its radial outer end, and a second wave-shaped portion 26 on the convex arc surface of the second diffuser blade 24 at its radial inner end.

[0023] Specifically, a first wave-shaped portion 25 is provided only on the concave arc surface of the first diffuser blade 23 and at its radially outer end, and a second wave-shaped portion 26 is provided only on the convex arc surface of the second diffuser blade 24 and at its radially inner end.

[0024] The present invention provides a fan for a dust removal and purification system, which, through the design of the first wave-shaped part 25 and the second wave-shaped part 26, can suppress flow separation on the surface of the diffuser blades, thereby reducing pressure and energy loss in the diffuser channel, thus reducing the noise of the centrifugal fan and improving the efficiency of the centrifugal fan.

[0025] Furthermore, the first wavy section 25 flows in a radial direction and terminates at the outlet edge of the first diffuser blade 23; the second wavy section 26 flows in a radial direction and begins at the inlet edge of the second diffuser blade 24; that is, within the same diffuser channel, the first wavy section 25 and the second wavy section 26 are arranged opposite to each other.

[0026] Furthermore, from the radial inner side to the radial outer side, the depth of the first wavy portion 25 gradually decreases or decreases in a stepwise manner, while the depth of the second wavy portion 26 gradually increases or increases in a stepwise manner.

[0027] The first wavy portion 25 and the second wavy portion 26 have a radial length L, which is 0.20-0.4 times, preferably 0.25-0.32 times, the total radial length of the first diffuser blade 23 or the second diffuser blade 24.

[0028] The inlet edge of the first diffuser blade 23 has a first blade inlet mounting angle a, and the inlet edge of the second diffuser blade 24 has a second blade inlet mounting angle b, where a > b. Specifically, a = (1.05 - 1.2)b.

[0029] The fan is a centrifugal fan, which is used in dust removal and purification systems in the environmental protection industry.

[0030] The present invention provides a fan for a dust removal and purification system, which, through the design of the first wave-shaped part 25 and the second wave-shaped part 26, can suppress flow separation on the surface of the diffuser blades, thereby reducing pressure and energy loss in the diffuser channel, thus reducing the noise of the centrifugal fan and improving the efficiency of the centrifugal fan.

[0031] The above embodiments are illustrative of the present invention and not intended to limit the invention. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan for a dust removal and purification system, comprising an impeller (21), a diffuser (22), and a volute, wherein the impeller is installed inside the volute, the impeller comprises a plurality of impeller blades (27) distributed circumferentially, and a diffuser is provided on the radial outer periphery of the impeller, the diffuser comprising a plurality of first diffuser blades (23) and second diffuser blades (24), the plurality of first diffuser blades and second diffuser blades being staggered circumferentially, and the first diffuser blades and second diffuser blades being arc-shaped blades; Its features are: The first diffuser blade has a concave arc surface and a first wavy portion (25) at its radial outer end, and the second diffuser blade has a convex arc surface and a second wavy portion (26) at its radial inner end; the first wavy portion (25) is provided only on the concave arc surface of the first diffuser blade (23) and at its radial outer end, and the second wavy portion (26) is provided only on the convex arc surface of the second diffuser blade (24) and at its radial inner end. The first wave-shaped section (25) and the second wave-shaped section (26) have a radial length L, which is 0.20-0.4 times the total radial length of the first diffuser blade (23) or the second diffuser blade (24). The inlet edge of the first diffuser blade (23) has a first blade inlet mounting angle a, and the inlet edge of the second diffuser blade (24) has a second blade inlet mounting angle b, a > b, and a = (1.05-1.25)b.

2. The fan for a dust removal and purification system as described in claim 1, characterized in that, The first wave-shaped section (25) flows in a radial direction and terminates at the outlet edge of the first diffuser blade; the second wave-shaped section (26) flows in a radial direction and begins at the inlet edge of the second diffuser blade (24).

3. A fan for a dust removal and purification system as described in claim 1, characterized in that, From the radial inner side to the radial outer side, the depth of the first wave-shaped part (25) gradually decreases or decreases in a stepwise manner, while the depth of the second wave-shaped part (26) gradually increases or increases in a stepwise manner.

4. A fan for a dust removal and purification system as described in claim 1, characterized in that, The fan is a centrifugal fan, which is used in dust removal and purification systems in the environmental protection industry.

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