CN212508886U - Low-noise rectangular centrifugal fan - Google Patents
Low-noise rectangular centrifugal fan Download PDFInfo
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- CN212508886U CN212508886U CN202021231216.6U CN202021231216U CN212508886U CN 212508886 U CN212508886 U CN 212508886U CN 202021231216 U CN202021231216 U CN 202021231216U CN 212508886 U CN212508886 U CN 212508886U
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- centrifugal fan
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Abstract
The utility model discloses a low-noise rectangular centrifugal fan, which comprises a centrifugal fan body, a rectangular shell sleeved outside the centrifugal fan body and a power motor fixed on the rectangular shell, wherein a silencing filler is filled between the centrifugal fan body and the rectangular shell; the centrifugal fan body comprises a fan volute, an air inlet arranged on the fan volute, an air outlet channel and an impeller arranged in the fan volute; and silencing plates are fixed on the inner walls of the fan volute and the air outlet channel.
Description
Technical Field
The utility model relates to a fan technical field especially relates to a low noise rectangle centrifugal fan.
Background
The centrifugal fan is a common device in our lives, and is commonly used for ventilation of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, but noise pollution is caused because vibration often makes a sound when the centrifugal fan works, and much inconvenience is caused to our lives; for example, patent publication No. CN201723477U discloses a centrifugal fan, which includes a spiral casing and an impeller driven by a motor in the casing, wherein an inner air inlet is formed in the bottom surface of the casing, and the edge of the inner air inlet is bent and extended upward to form a collector; the spiral fan shell enables the direction of the air flow accelerated by the impeller to be consistent with the direction of the inner air outlet, is more beneficial to reducing turbulent flow, and effectively reduces the noise generated in the air flow conveying process but can not eliminate the noise generated in the vibration of the fan.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a low-noise rectangular centrifugal fan is provided to solve the problems.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a pair of low noise rectangle centrifugal fan, locate the outside rectangle shell of centrifugal fan body and fix the motor power at the rectangle shell, its characterized in that including centrifugal fan body, cover: the space between the centrifugal fan body and the rectangular shell is filled with a silencing filling body; the centrifugal fan body comprises a fan volute, an air inlet arranged on the fan volute, an air outlet channel and an impeller arranged in the fan volute; silencing plates are fixed on the inner wall of the volute of the fan and the inner wall of the air outlet channel; the power motor is coaxially, concentrically and fixedly connected with the impeller.
Furthermore, the rectangular shell is provided with an overhaul board for overhauling the centrifugal fan body, and the overhaul board is provided with a vent corresponding to the air inlet.
Further, the power motor is fixed on the rectangular shell through a support frame; the support frame passes through the screw fixation on the rectangle shell, and it is provided with the shock pad to laminate out at support frame and rectangle shell.
Further, the central shaft of the power motor is connected with a fan volute bearing.
Further, the impeller is fixed on a central shaft of the power motor.
Furthermore, a plurality of arc-shaped fan blades are uniformly distributed around the impeller.
The utility model has the advantages that:
a low-noise rectangular centrifugal fan is filled with a silencing filling body between a rectangular shell and a centrifugal fan body, and vibration generated during the operation of the centrifugal fan is absorbed by the silencing filling body to reduce the noise output; the silencing plates are fixed on the inner wall of the volute of the fan and the inner wall of the air outlet channel, so that the sound generated by the friction between the air flow and the inner wall of the volute and between the air flow and the air outlet channel can be effectively reduced; the power motor is coaxially and concentrically fixedly connected with the impeller, so that the vibration generated by the impeller during rotation can be reduced.
Drawings
FIG. 1 is a schematic view of a cross-sectional structure of a low-noise rectangular centrifugal fan according to the present invention;
FIG. 2 is a schematic view of the overall structure of a low-noise rectangular centrifugal fan according to the present invention;
FIG. 3 is a schematic view of the front structure of a low-noise rectangular centrifugal fan according to the present invention;
fig. 4 is a schematic view of the back structure of a rectangular centrifugal fan with low noise.
Reference numbers in the figures:
1. a centrifugal fan body; 11. a fan volute; 12. an air inlet; 13. an air outlet channel; 14. an impeller; 141. arc-shaped fan blades; 15. a sound-absorbing panel; 2. a rectangular housing; 21. an access panel; 22. a vent; 3. a power motor; 31. a support frame; 32. a screw; 33. a shock pad; 34. a central shaft; 4. a sound-deadening infill.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 4, the low-noise rectangular centrifugal fan provided in this embodiment includes a centrifugal fan body 1, a rectangular housing 2 sleeved outside the centrifugal fan body 1, and a power motor 3 fixed on the rectangular housing 2, and is characterized in that: the space between the centrifugal fan body 1 and the rectangular shell 2 is filled with a silencing filling body 4, the silencing filling body 4 is silencing cotton or PDM rubber, and vibration generated during the operation of the centrifugal fan is absorbed by the silencing filling body 4 to reduce the noise output; the centrifugal fan body 1 comprises a fan volute 11, an air inlet 12 arranged on the fan volute 11, an air outlet channel 13 and an impeller 14 arranged in the fan volute 11; the silencing plates 15 are fixed on the inner wall of the fan volute 11 and the inner wall of the air outlet channel 13, so that the sound generated by the friction between the air flow and the inner wall of the fan volute 11 and the friction between the air flow and the air outlet channel 13 can be effectively reduced; the power motor 3 is coaxially and concentrically fixedly connected with the impeller 14, so that the vibration generated when the impeller 14 rotates can be reduced.
Furthermore, an overhaul panel 21 for overhauling the centrifugal fan body 1 is arranged on the rectangular shell 2, so that the overhauling is convenient when the fan is abnormal; the access panel 21 is provided with a vent 22 corresponding to the air inlet 12 to facilitate better gas circulation.
Further, the power motor 3 is fixed on the rectangular shell 2 through a support frame 31; the support frame 31 is fixed on the rectangular shell 2 through a screw 32, and a shock absorption pad 33 is attached to the support frame 31 and the rectangular shell 2 to reduce the shock generated by the motor and generate collision sound with the rectangular shell 2.
Further, a central shaft 34 of the power motor 3 is in bearing connection with the fan volute 11; reducing the friction between the central shaft 34 and the fan volute 11 produces noise.
Further, the impeller 14 is fixed to a central shaft 34 of the power motor 3, so that the impeller 14 and the power motor 3 are concentrically and coaxially connected.
Further, a plurality of arc-shaped fan blades 141 are uniformly distributed around the impeller 14, so that the impeller 14 and the arc-shaped fan blades 141 integrally form a circular structure, and the sound generated by vibration generated by high-speed rotation of the impeller 14 is reduced.
The working principle is as follows:
a low-noise rectangular centrifugal fan is filled with a silencing filling body 4 between a rectangular shell 2 and a centrifugal fan body 1, and vibration generated during the operation of the centrifugal fan is absorbed by the silencing filling body 4, so that the output of noise is reduced; the silencing plates 15 are fixed on the inner wall of the fan volute 11 and the inner wall of the air outlet channel 13, so that the sound generated by the friction between the air flow and the inner wall of the fan volute 11 and the friction between the air flow and the air outlet channel 13 can be effectively reduced; the coaxial concentric fixed connection of the power motor 3 and the impeller 14 can reduce the vibration generated by the impeller 14 when rotating.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (6)
1. The utility model provides a low noise rectangle centrifugal fan, includes centrifugal fan body (1), the outside rectangle shell (2) of centrifugal fan body (1) and fixes power motor (3) at rectangle shell (2) are located to the cover, its characterized in that: the space between the centrifugal fan body (1) and the rectangular shell (2) is filled with a silencing filling body (4); the centrifugal fan body (1) comprises a fan volute (11), an air inlet (12) arranged on the fan volute (11), an air outlet channel (13) and an impeller (14) arranged in the fan volute (11); a sound-absorbing plate (15) is fixed on the inner wall of the fan volute (11) and the inner wall of the air outlet channel (13); the power motor (3) is coaxially, concentrically and fixedly connected with the impeller (14).
2. The rectangular centrifugal fan with low noise according to claim 1, wherein: the rectangular shell (2) is provided with an overhaul board (21) for overhauling the centrifugal fan body (1), and the overhaul board (21) is provided with a ventilation opening (22) corresponding to the air inlet (12).
3. The rectangular centrifugal fan with low noise according to claim 1, wherein: the power motor (3) is fixed on the rectangular shell (2) through a support frame (31); the support frame (31) is fixed on the rectangular shell (2) through screws (32), and a shock pad (33) is attached to the support frame (31) and the rectangular shell (2).
4. The rectangular centrifugal fan with low noise according to claim 1, wherein: and a central shaft (34) of the power motor (3) is in bearing connection with the fan volute (11).
5. The rectangular centrifugal fan with low noise according to claim 1, wherein: the impeller (14) is fixed on a central shaft (34) of the power motor (3).
6. The rectangular centrifugal fan with low noise according to claim 1, wherein: a plurality of arc-shaped fan blades (141) are uniformly distributed around the impeller (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021231216.6U CN212508886U (en) | 2020-06-29 | 2020-06-29 | Low-noise rectangular centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021231216.6U CN212508886U (en) | 2020-06-29 | 2020-06-29 | Low-noise rectangular centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508886U true CN212508886U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021231216.6U Active CN212508886U (en) | 2020-06-29 | 2020-06-29 | Low-noise rectangular centrifugal fan |
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| CN (1) | CN212508886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776638A (en) * | 2022-05-30 | 2022-07-22 | 贵州汇天诚安全设施有限公司 | Low-noise cabinet type centrifugal fan |
-
2020
- 2020-06-29 CN CN202021231216.6U patent/CN212508886U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776638A (en) * | 2022-05-30 | 2022-07-22 | 贵州汇天诚安全设施有限公司 | Low-noise cabinet type centrifugal fan |
| CN114776638B (en) * | 2022-05-30 | 2024-06-07 | 贵州汇天诚安全设施有限公司 | Low-noise cabinet type centrifugal fan |
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