Centrifugal fan volute

Abstract

The centrifugal fan volute comprises a cylindrical shell with shells at the two ends, a bearing plate is arranged at one end of the cylindrical shell, an air inlet pipe is arranged at the other end of the cylindrical shell, an arc-shaped opening is formed in the side face of the cylindrical shell, and arc grooves are formed in the positions, located at the two ends of the arc-shaped opening, of the outer side of the cylindrical shell respectively. The arc-shaped open outer cover is provided with an arc plate, the two ends of the arc plate are arranged in the corresponding arc grooves in a sliding mode, a plurality of studs are arranged in the arc grooves in the axial direction parallel to the cylindrical shell, the arc plate is provided with arc holes arranged on the studs in a sleeving mode, and nuts pressing the arc plate are connected to the outer portions of the studs in a threaded mode. And the outer side of the arc plate is fixedly connected with an exhaust pipe communicated with the inner cavity of the cylindrical shell. According to the centrifugal fan volute, the exhaust direction of the exhaust pipe can be adjusted through rotation, so that the centrifugal fan volute can be used for more scenes.

Description

Technical Field

[0001] The utility model relates to a centrifugal fan, in particular to a volute of a centrifugal fan. Background Art

[0002] Centrifugal fans are based on the principle of converting kinetic energy into potential energy. They use a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction to convert kinetic energy into potential energy. In a single-stage centrifugal fan, the gas enters the impeller axially, changes to radial direction when passing through the impeller, and finally is discharged from the outlet.

[0003] Chinese patent CN202310934862.0 discloses a centrifugal fan and a range hood using the centrifugal fan, wherein the centrifugal fan includes a volute, the volute includes two cover plates arranged at intervals and an annular wall arranged between the two cover plates; the centrifugal fan also includes a guide assembly, the guide assembly includes guide vanes located at intervals on the outer periphery of the impeller of the centrifugal fan, and the guide vanes extend between the two cover plates along a direction parallel to the axial direction of the centrifugal fan.

[0004] The centrifugal fan records a volute structure, the air outlet direction of the volute structure is fixed, and the air outlet direction cannot be adjusted according to different usage scenarios. Utility Model Content

[0005] The utility model aims to provide a centrifugal fan volute, which can adjust the exhaust direction of an exhaust pipe by rotating, so that the centrifugal fan volute can be used in more scenarios.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a centrifugal fan volute, which comprises a cylindrical shell with shells at both ends, one end of the cylindrical shell is provided with a bearing plate, and the other end is provided with an air inlet pipe, the side of the cylindrical shell is provided with an arc-shaped opening, the outer side of the cylindrical shell is respectively provided with an arc groove at both ends of the arc-shaped opening, the outer cover of the arc-shaped opening is provided with an arc plate, the two ends of the arc plate are slidably arranged in the corresponding arc grooves, a plurality of studs are arranged in the arc groove along the axial direction parallel to the cylindrical shell, the arc plate is provided with an arc hole sleeved on the stud, a nut for pressing the arc plate is screwed outside the stud, and an exhaust pipe connected to the inner cavity of the cylindrical shell is fixedly connected to the outer side of the arc plate.

[0007] Preferably, a pad is provided between the arc plate and the nut, the bottom surface of the pad is set as an arc surface that fits the outer surface of the arc plate, and the top surface of the pad is set as a plane.

[0008] Preferably, the bearing plate is screwed to the end surface of the cylindrical shell by a plurality of circumferentially arranged screws.

[0009] Preferably, a first flange is provided at the outer end of the air inlet pipe.

[0010] Preferably, a second flange is provided at the outer end of the exhaust pipe.

[0011] According to the above technical scheme, the utility model provides a centrifugal fan volute, which includes a cylindrical shell with shells at both ends, one end of the cylindrical shell is provided with a bearing plate, and the other end is provided with an air inlet pipe, the side of the cylindrical shell is provided with an arc-shaped opening, the outer side of the cylindrical shell is respectively provided with an arc groove at both ends of the arc-shaped opening, the outer cover of the arc-shaped opening is provided with an arc plate, the two ends of the arc plate are slidably arranged in the corresponding arc grooves, a plurality of studs are arranged in the arc groove along the axial direction parallel to the cylindrical shell, the arc plate is provided with an arc hole sleeved on the stud, a nut for pressing the arc plate is screwed outside the stud, and an exhaust pipe connected to the inner cavity of the cylindrical shell is fixedly connected to the outer side of the arc plate.

[0012] When you need to adjust the air outlet angle of the exhaust duct, loosen all the nuts, slide the two ends of the arc plate along the corresponding arc grooves, and tighten all the nuts after adjusting them into place.

[0013] Since the centrifugal fan volute can adjust the exhaust direction of the exhaust pipe by rotating, the centrifugal fan volute can be used in more scenarios.

[0014] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of a centrifugal fan volute;

[0017] Figure 2 It is a schematic diagram of the overall structure of a preferred embodiment of a centrifugal fan volute from another perspective;

[0018] Figure 3 It is a side structural schematic diagram of a preferred embodiment of a centrifugal fan volute;

[0019] Figure 4 yes Figure 3 AA cross-sectional structural diagram;

[0020] Figure 5It is a schematic diagram of the overall structure of a preferred embodiment of a cylindrical shell;

[0021] Figure 6 It is a schematic diagram of the connection structure between the arc plate and the exhaust duct.

[0022] Description of Reference Numerals

[0023] 1-cylindrical shell; 2-air inlet pipe; 3-first flange; 4-exhaust pipe; 5-second flange; 6-arc plate; 7-arc groove; 8-arc hole; 9-pad; 10-nut; 11-stud; 12-bearing plate; 13-screw; 14-arc opening. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0025] In the present utility model, unless otherwise stated, directional words contained in terms such as "up, down, left, right, front, back, inside, outside" merely represent the orientation of the terms in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms.

[0026] See also Figure 1-6 The centrifugal fan volute shown in the figure comprises a cylindrical shell 1 with shells at both ends, one end of the cylindrical shell 1 is provided with a bearing plate 12, and the other end is provided with an air inlet pipe 2, the side of the cylindrical shell 1 is provided with an arc opening 14, the outer side of the cylindrical shell 1 is provided with an arc groove 7 at both ends of the arc opening 14, the outer cover of the arc opening 14 is provided with an arc plate 6, the two ends of the arc plate 6 are slidably arranged in the corresponding arc groove 7, a plurality of studs 11 are arranged in the arc groove 7 along the axial direction parallel to the cylindrical shell 1, the arc plate 6 is provided with an arc hole 8 sleeved on the stud 11, the stud 11 is externally screwed with a nut 10 for pressing the arc plate 6, and the outer side of the arc plate 6 is fixedly connected with an exhaust pipe 4 connected to the inner cavity of the cylindrical shell 1.

[0027] Through the implementation of the above technical solution, when it is necessary to adjust the air outlet angle of the exhaust pipe 4, loosen all the nuts 10, slide the two ends of the arc plate 6 along the corresponding arc groove 7, and tighten all the nuts 10 after adjusting them in place. Since the centrifugal fan volute can adjust the exhaust direction of the exhaust pipe 4 by rotating, the centrifugal fan volute can be used for more scenarios. When assembling the centrifugal fan volute, the impeller is installed inside the cylindrical shell 1 and kept coaxial with the cylindrical shell 1, and then the driving shaft that drives the impeller to rotate is extended into the cylindrical shell 1 after passing through the through hole on the bearing plate 12 and fixedly inserted into the middle of the impeller. After the motor connected to the driving shaft is started, the impeller is driven to rotate. The air enters from the air inlet pipe 2 under the rotation of the impeller, and then is discharged from the exhaust pipe 4. The direction of the exhaust can be adjusted by adjusting the direction of the exhaust pipe 4.

[0028] In this embodiment, a backing plate 9 is arranged between the arc plate 6 and the nut 10, the bottom surface of the backing plate 9 is arranged as an arc surface that fits the outer surface of the arc plate 6, and the top surface of the backing plate 9 is arranged as a plane. A backing plate 9 is arranged at each end of the arc plate 6, and a plurality of studs 11 at each end are all arranged through the same backing plate 9. When the nut 10 is tightened, the arc surface of the bottom surface of the backing plate 9 is pressed against the outer surface of the arc plate 6, thereby playing the role of pressing and fixing the arc plate 6. In addition, when adjusting the position of the arc plate 6, the cooperation between the arc hole 8 and the stud 11 can also form a guiding role.

[0029] In this embodiment, the bearing plate 12 is screwed to the end face of the cylindrical shell 1 by a plurality of circumferentially arranged screws 13. In this way, the bearing plate 12 can be detachably mounted on the end face of the cylindrical shell 1. The two end faces of the cylindrical shell 1 are respectively provided with an air inlet coaxial with the air inlet pipe 2, and a through hole coaxial with the bearing plate 12, and the through hole is arranged to allow the drive shaft to pass through. A plurality of mounting holes for passing the screws 13 are arranged around the bearing plate 12, and screw holes corresponding to the mounting holes are also arranged on the end face of the cylindrical shell 1. A bearing hole for mounting a bearing is arranged in the middle of the bearing plate 12, and the drive shaft passes through the bearing hole. The bearing fixing sleeve is arranged on the drive bearing, so that the rotation of the drive shaft is smoother.

[0030] In this embodiment, a first flange 3 is provided at the outer end of the air inlet pipe 2. The provision of the first flange 3 facilitates the connection of other pipe bodies at the outer end of the air inlet pipe 2.

[0031] In this embodiment, the outer end of the exhaust pipe 4 is provided with a second flange 5. The second flange 5 is provided to facilitate connecting other pipe bodies at the outer end of the exhaust pipe 4.

[0032] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0033] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0034] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A centrifugal fan volute, characterized in that: The centrifugal fan volute comprises a cylindrical shell (1) with shells at both ends, a bearing plate (12) is provided at one end of the cylindrical shell (1), and an air inlet pipe (2) is provided at the other end, an arc-shaped opening (14) is provided on the side of the cylindrical shell (1), an arc groove (7) is provided at the two ends of the arc-shaped opening (14) on the outer side of the cylindrical shell (1), and an arc plate (6) is provided on the outer cover of the arc-shaped opening (14), and the two ends of the arc plate (6) are slidable. The circular arc plate (6) is movably arranged in the corresponding circular arc groove (7), a plurality of studs (11) are arranged in the circular arc groove (7) along the axial direction parallel to the cylindrical shell (1), the circular arc plate (6) is provided with circular arc holes (8) sleeved on the studs (11), the studs (11) are externally screwed with nuts (10) for pressing the circular arc plate (6), and the outer side of the circular arc plate (6) is fixedly connected with an exhaust pipe (4) which is connected to the inner cavity of the cylindrical shell (1).

2. The centrifugal fan volute according to claim 1, characterized in that: A pad (9) is provided between the arc plate (6) and the nut (10), the bottom surface of the pad (9) being arranged as an arc surface that fits the outer surface of the arc plate (6), and the top surface of the pad (9) being arranged as a plane.

3. The centrifugal fan volute according to claim 1, characterized in that: The bearing plate (12) is screwed to the end surface of the cylindrical shell (1) via a plurality of circumferentially arranged screws (13).

4. The centrifugal fan volute according to claim 1, characterized in that: The outer end of the air inlet pipe (2) is provided with a first flange (3).

5. The centrifugal fan volute according to claim 1, characterized in that: The outer end of the exhaust pipe (4) is provided with a second flange (5).

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