Volute structure of high-temperature fan

Abstract

The utility model discloses a high-temperature fan volute structure which comprises a machine shell side plate and a volute plate, an air outlet is formed in the left side of the volute plate, a volute tongue is arranged on the upper side of the interior of the air outlet and comprises a first volute tongue plate and a second volute tongue plate, and volute tongue round steel is arranged in the arc-shaped connecting portion of the second volute tongue plate and the first volute tongue plate. The circumferential face of the volute tongue round steel is connected with the outer side of the first volute tongue plate and the outer side of the second volute tongue plate in an attached mode. The volute tongue has the advantages that the structural strength of the arc connecting position of the first volute tongue plate and the second volute tongue plate can be effectively improved through the volute tongue round steel, and it is guaranteed that a large number of vortexes generated by rotation of a fan impeller can be stably transited to an air outlet at the arc connecting position of the first volute tongue plate and the second volute tongue plate; the use strength of the fan volute is guaranteed, the problem of vortex impact vibration occurring in the use process of a fan can be effectively solved, it is guaranteed that the fan can stably operate under strong airflow impact and vibration, and the service life of the fan is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature fans, in particular to a volute structure of a high-temperature fan. Background Art

[0002] In the non-ferrous metal industry, the fans used in aluminum melting furnaces, homogenizing furnace cooling chambers and other furnaces are mostly high-temperature smoke exhaust circulation fans. These cooling fans are horizontally mounted large-air-volume fans. The working environment of these fans is relatively harsh and the working intensity is high. In addition, large-air-volume fans have the characteristics of wide casing width and large external dimensions. Therefore, when these fans are operated under high airflow requirements, there will always be eddy vibration of the air flow in the casing due to the eddy impact at the volute tongue. Therefore, when these fans are operated at high temperatures, the strength structure design of the casing is critical. How to design the casing structure to improve the impact and vibration resistance is currently a key research topic for these fans. Utility Model Content

[0003] The utility model aims to provide a high-temperature fan volute structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature fan volute structure, comprising two casing side panels arranged front and rear and a volute plate located between the two casing side panels, an air outlet is opened on the left side of the volute plate, a volute tongue is provided on the inner upper side of the air outlet, the volute tongue comprises a first volute tongue plate and a second volute tongue plate, the first volute tongue plate is in an arc-shaped structure and is connected to the volute plate, the second volute tongue plate is arc-connected to the first volute tongue plate, the end of the second volute tongue plate away from the first volute tongue plate and the two casing side panels and the end of the volute plate away from the first volute tongue plate form an air outlet, a volute tongue round steel is provided in the arc-shaped connecting portion between the second volute tongue plate and the first volute tongue plate, and the circumferential surface of the volute tongue round steel is fitted and connected to the outer sides of the first volute tongue plate and the second volute tongue plate.

[0005] Further preferably, the volute tongue round steel is a seamless cylindrical steel pipe structure with high structural strength, relatively light weight, and strong impact and vibration resistance.

[0006] Further preferably, the volute plate, the first volute tongue plate and the second volute tongue plate are an integrally bent structure, which is easy to process; the tube wall thickness of the volute tongue round steel is greater than the plate thickness of the first volute tongue plate, ensuring the impact and vibration resistance of the arc connection between the first volute tongue plate and the second volute tongue plate.

[0007] Further preferably, the circumferential surface of the volute tongue round steel is welded to the outer side surfaces of the first volute tongue plate and the second volute tongue plate, and the connection is simple and firm.

[0008] Further preferably, the second volute tongue plate includes an upwardly inclined slope and a plane, the slope is connected to the first volute tongue plate, and the plane is connected to the slope, the slope can increase the flow cross-sectional area of ​​the airflow and reduce the occurrence of eddy currents, backflows and the like, and the plane can reduce the impact force of the airflow.

[0009] Further preferably, a connecting plate is connected between the plane and the volute plate to improve the structural strength and impact resistance of the plane while also preventing vibration and reducing noise.

[0010] Further preferably, the plane and the volute are both provided with an L-shaped air outlet flange on the outer side near the air outlet, so as to facilitate connection to a connecting structure such as a pipeline at the air outlet.

[0011] Further preferably, the outer side surfaces of the casing side plates and the volute plate are provided with a plurality of reinforcing ribs, which can effectively improve the overall strength of the volute structure.

[0012] Beneficial effects: The utility model provides a high-temperature fan volute structure, by adding a volute tongue round steel at the circular arc connection of the first volute tongue plate and the second volute tongue plate of the volute tongue, which can effectively improve the structural strength of the circular arc connection of the first volute tongue plate and the second volute tongue plate, and ensure that a large amount of eddy currents generated by the rotation of the fan impeller can smoothly transition to the air outlet at the circular arc connection of the first volute tongue plate and the second volute tongue plate, so that the use strength of the fan volute is guaranteed, and can effectively solve the eddy current impact and vibration problems that occur during the use of the fan, and ensure that the fan can operate smoothly under strong airflow impact and vibration, and ensure the service life of the fan; the addition of the volute tongue round steel has a simple structure and is easy to implement, the volute structure change is small, and the modification cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial structural schematic diagram of the high-temperature fan volute structure disclosed in the embodiment of the utility model;

[0014] Figure 2 The present invention is a schematic diagram of the matching structure of the volute tongue and the volute tongue round steel disclosed in the embodiment of the present utility model.

[0015] Figure numerals: 1- casing side panel, 2- volute plate, 3- air outlet, 4- volute tongue, 41- first volute tongue plate, 42- second volute tongue plate, 421- inclined plane, 422- plane, 5- volute tongue round steel, 6- air outlet flange, 7- connecting plate, 8- reinforcing rib plate. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figure 1-2As shown, a high-temperature fan volute structure is installed on a high-temperature fan, and is used to provide protection for the impeller of the fan and guide the airflow to flow in a specific direction. The volute structure includes two casing side panels 1 arranged in front and behind and a volute 2 located between the two casing side panels 1. An air outlet 3 is opened on the left side of the volute 2. The two casing side panels 1 and the volute 2 enclose a cavity. The impeller of the fan rotates in the cavity to discharge the airflow generated by the fan along the air outlet 3. A volute tongue 4 is provided on the upper side of the inner part of the air outlet 3. The volute tongue 4 can prevent part of the gas from circulating in the volute. When the fan impeller blades are rotated, when the airflow at the air outlet 3 passes near the volute tongue 4, the volute tongue 4 divides the airflow into two parts. Most of the airflow is discharged from the air outlet 3 along the volute tongue 4, and a small part of the airflow flows back to the cavity enclosed by the casing side panel 1 and the volute 2 through the gap between the volute tongue 4 and the impeller, and returns to the volute tongue 4 to participate in the new diversion after the impeller rotates one circle. The volute tongue 4 includes a first volute tongue plate 41 and a second volute tongue plate 42. The first volute tongue plate 41 is an arc-shaped structure and is connected to the volute plate 2. The second volute tongue plate 42 is arc-connected to the first volute tongue plate 41. The end of the second volute tongue plate 42 away from the first volute tongue plate 41 and the two housing side plates 1 and the end of the volute plate 2 away from the first volute tongue plate 41 enclose an air outlet 3. A volute tongue round steel 5 is provided in the arc-shaped connection portion between the second volute tongue plate 42 and the first volute tongue plate 41. The circumferential surface of the volute tongue round steel 5 is connected to the first volute tongue plate 41 and the second volute tongue plate 4 2 is fitted and connected to the outside of the first volute tongue plate 41 and the second volute tongue plate 42, and by arranging a volute tongue round steel 5 at the arc connection of the first volute tongue plate 41 and the second volute tongue plate 42, the structural strength of the arc connection can be effectively improved. A large amount of eddy currents generated by the rotation of the fan impeller can smoothly transition to the air outlet 3 at the arc connection of the first volute tongue plate 41 and the second volute tongue plate 42 provided with the volute tongue round steel 5, so that the use strength of the fan volute is guaranteed, and the eddy current impact vibration problem occurring during the use of the fan can be effectively solved, so that the fan always works in a stable area.

[0018] In the present application, the volute tongue round steel 5 is a seamless cylindrical steel pipe structure, which is not only strong in structure, but also not as heavy as the round steel of solid structure, and the cost is relatively much lower. The volute plate 2, the first volute tongue plate 41 and the second volute tongue plate 42 are an integrated bending structure, which is easy to process and has high overall structural strength; the tube wall thickness of the volute tongue round steel 5 is greater than the plate thickness of the first volute tongue plate 41, which ensures the result strength and support strength of the volute tongue round steel 5, ensures the support force of the arc connection of the first volute tongue plate 41 and the second volute tongue plate 42 of the volute tongue round steel 5, and effectively ensures the impact resistance and vibration strength of the volute tongue 4.

[0019] In the present application, the circumferential surface of the volute tongue round steel 5 is welded to the outer side surfaces of the first volute tongue plate 41 and the second volute tongue plate 42. The connection is convenient, easy, and firm, which can ensure the stability of the volute tongue round steel 5 at the arc connection between the first volute tongue plate 41 and the second volute tongue plate 42.

[0020] In the present application, the second volute tongue plate 42 includes an upwardly inclined slope 421 and a plane 422, wherein the slope 421 is connected to the first volute tongue plate 41, and the plane 422 is connected to the slope 421. The slope 421 can expand the flow cross-sectional area of ​​the airflow, reduce the generation of vortex and backflow phenomena, and the plane 422 can provide a part of the resistance, reducing the strength of the airflow rushing out of the air outlet 3. A connecting plate 7 is connected between the plane 422 and the volute plate 2, which can enhance the structural strength and stability of the plane 422 and reduce vibration and noise generated by the airflow impacting the plane 422.

[0021] In the present application, an L-shaped air outlet flange 6 is provided on the outer side of the plane 422 and the volute 2 near the air outlet 3 , so as to facilitate the connection of structural components such as pipelines at the air outlet 3 .

[0022] In the present application, a plurality of reinforcing ribs 8 are provided on the outer side surfaces of the casing side plates 1 and the volute 2, which can effectively improve the structural strength of the volute structure.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A high-temperature fan volute structure, comprising two casing side plates (1) arranged front and rear and a volute plate (2) located between the two casing side plates (1), an air outlet (3) being provided on the left side of the volute plate (2), and a volute tongue (4) being provided on the inner upper side of the air outlet (3), characterized in that: The volute tongue (4) comprises a first volute tongue plate (41) and a second volute tongue plate (42); the first volute tongue plate (41) is in an arc-shaped structure and is connected to the volute (2); the second volute tongue plate (42) is arc-connected to the first volute tongue plate (41); the end of the second volute tongue plate (42) away from the first volute tongue plate (41) and the two casing side plates (1) and the end of the volute (2) away from the first volute tongue plate (41) enclose an air outlet (3); a volute tongue round steel (5) is provided in the arc-shaped connection portion between the second volute tongue plate (42) and the first volute tongue plate (41); the circumferential surface of the volute tongue round steel (5) is fitted and connected to the outer sides of the first volute tongue plate (41) and the second volute tongue plate (42).

2. A high temperature fan volute structure according to claim 1, characterized in that: The volute tongue round steel (5) is a seamless cylindrical steel pipe structure.

3. A high temperature fan volute structure according to claim 2, characterized in that: The volute plate (2), the first volute tongue plate (41) and the second volute tongue plate (42) are an integrally bent structure, and the wall thickness of the volute tongue round steel (5) is greater than the plate thickness of the first volute tongue plate (41).

4. A high temperature fan volute structure according to claim 3, characterized in that: The circumferential surface of the volute tongue round steel (5) is welded to the outer side surfaces of the first volute tongue plate (41) and the second volute tongue plate (42).

5. The high temperature fan volute structure according to claim 1, characterized in that: The second volute tongue plate (42) comprises an upwardly inclined inclined surface (421) and a plane (422); the inclined surface (421) is connected to the first volute tongue plate (41), and the plane (422) is connected to the inclined surface (421).

6. A high temperature fan volute structure according to claim 5, characterized in that: A connecting plate (7) is connected between the plane (422) and the volute (2).

7. A high temperature fan volute structure according to claim 5, characterized in that: The plane (422) and the outer side of the volute (2) near the air outlet (3) are both provided with an L-shaped air outlet flange (6).

8. The high temperature fan volute structure according to claim 1, characterized in that: The outer side surfaces of the casing side plate (1) and the volute plate (2) are both provided with a plurality of reinforcing rib plates (8).

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