CN211423004U - Centrifugal fan impeller - Google Patents
Centrifugal fan impeller Download PDFInfo
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- CN211423004U CN211423004U CN201922340830.XU CN201922340830U CN211423004U CN 211423004 U CN211423004 U CN 211423004U CN 201922340830 U CN201922340830 U CN 201922340830U CN 211423004 U CN211423004 U CN 211423004U
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- wheel cover
- upper bottom
- blades
- centrifugal fan
- annular wheel
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Abstract
The utility model provides a centrifugal fan impeller belongs to fan technical field. It has solved the big problem of the current centrifugal fan blade processing degree of difficulty. The centrifugal fan impeller comprises an annular wheel cover, a wheel disc and a plurality of blades vertically arranged between the wheel disc and the annular wheel cover, wherein the annular wheel cover and the wheel disc are arranged in parallel up and down, the blades are uniformly distributed along the circumferential direction of the annular wheel cover, the axial section of the annular wheel cover is in the shape of an inwards concave arc, the blades are inclined relative to the axis of the wheel disc, the blades are in a straight sheet shape, the blades are in a right trapezoid shape, each blade comprises an upper bottom surface and a lower bottom surface, the length of each lower bottom surface is greater than that of each upper bottom surface, each upper bottom surface is in the shape of an arc matched with the annular wheel cover, each upper bottom surface is attached; the position of one side of the upper bottom surface, which is close to the inner hole of the annular wheel cover, is higher than the other side of the upper bottom surface, and the position of the upper bottom surface is gradually reduced from top to bottom. The centrifugal fan impeller is low in processing difficulty.
Description
Technical Field
The utility model belongs to the technical field of the fan, a centrifugal fan, especially a centrifugal fan impeller are related to.
Background
The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, an impeller is an important part of the centrifugal fan, and the working principle of the centrifugal fan is that the gas is sucked in through the central part of the impeller under the action of centrifugal force and then flows between blades to flow out.
The existing impeller is a large-flow centrifugal fan impeller as disclosed in the chinese patent library [ application number: 201721532571.5, comprising wheel covers, blades, and wheel discs; the blades are arranged between the wheel cover and the wheel disc; the wheel cover adopts a large plane ring structure with a streamline arc inlet and a 45-degree conical outlet, and the blades adopt a strong backward-bending arc single plate structure.
The arc-shaped blade structure is formed by bending, and during actual processing, because the thickness of the blade is not very large, the blade is easy to crack in the bending process, so that the quality of the blade is influenced, and certain processing difficulty exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having the above-mentioned problem to current technique, provided a centrifugal fan impeller, the technical problem of solution is how to reduce the processing degree of difficulty.
The purpose of the utility model can be realized by the following technical proposal: the centrifugal fan impeller comprises an annular wheel cover, a wheel disc and a plurality of blades vertically arranged between the wheel disc and the annular wheel cover, wherein the annular wheel cover and the wheel disc are arranged in parallel up and down, the blades are uniformly distributed along the circumferential direction of the annular wheel cover, the cross section of the annular wheel cover in the axial direction is in an inwards concave arc shape, and the blades are inclined relative to the axis of the wheel disc; the position of one side of the upper bottom surface, which is close to the inner hole of the annular wheel cover, is higher than the other side of the upper bottom surface, and the position of the upper bottom surface is gradually reduced from top to bottom.
The upper bottom surface of each blade is in a circular arc shape matched with the wheel cover, and the upper bottom surface is gradually reduced from top to bottom, so that the impeller can be effectively ensured to have good air performance and excellent running performance and efficiency.
The blade adopts the straight piece formula structure, when adding man-hour in reality like this, only need by the slice blank through machining or the one-time shaping of mould alright obtain the finished product blade, whole course of working not only the degree of difficulty is low, convenient, the cost is low again moreover.
In the centrifugal fan impeller, the upper end surface of the wheel disc and the lower bottom surface of the blades are both planes, so that the blades and the wheel disc are connected stably, and the running stability of the impeller is improved.
In the centrifugal fan impeller, the blades are fixedly connected with the annular wheel cover and the wheel disc respectively in a welding mode.
In the centrifugal fan impeller, the central angle corresponding to the upper bottom surface is 30 to 45 degrees.
Compared with the prior art, the centrifugal fan impeller has the following advantages:
1. the upper bottom surface of each blade is in a circular arc shape matched with the wheel cover, and the upper bottom surface is gradually reduced from top to bottom, so that the impeller can be effectively ensured to have good air performance and excellent running performance and efficiency.
2. The blade adopts the straight piece formula structure, when adding man-hour in reality like this, only need by the slice blank through machining or the one-time shaping of mould alright obtain the finished product blade, whole course of working not only the degree of difficulty is low, convenient, the cost is low again moreover.
Drawings
Fig. 1 is a schematic perspective view of the centrifugal fan impeller.
Fig. 2 is a schematic sectional structure view of the centrifugal fan impeller.
In the figure, 1, an annular wheel cover; 2. a wheel disc; 2a, a tray body; 2b, a shaft disc; 3. a blade; 3a, an upper bottom surface; 3b, lower bottom surface.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, the centrifugal fan impeller comprises an annular wheel cover 1 and a wheel disc 2 which are arranged in parallel up and down, and blades 3 which are vertically arranged between the wheel disc 2 and the annular wheel cover 1. Wherein, rim plate 2 comprises disk body 2a that is annular and the reel 2b that sets firmly in disk body 2a hole, and blade 3 has a plurality ofly and along annular wheel cover 1's circumference interval equipartition. The section of the annular wheel cover 1 in the axial direction is in a concave arc shape, and the blades 3 are inclined relative to the axis of the wheel disc 2.
Specifically, as shown in fig. 2, the blade 3 is a straight piece, and the blade 3 has a right-angled trapezoid shape. The blade 3 comprises an upper bottom surface 3a and a lower bottom surface 3b with the length larger than that of the upper bottom surface 3a, wherein the upper bottom surface 3a is in a circular arc shape matched with the annular wheel cover 1, the upper bottom surface 3a is attached to the inner side wall of the annular wheel cover 1, and the lower bottom surface 3b is attached to the upper end surface of the wheel disc 2. The position of one side of the upper bottom surface 3a close to the inner hole of the annular wheel cover 1 is higher than the other side of the upper bottom surface 3a, and the position of the upper bottom surface 3a is gradually reduced from top to bottom. The upper bottom surface 3a of the blade 3 is arc-shaped and matched with the wheel cover, and the position of the upper bottom surface 3a is gradually reduced from top to bottom, so that the impeller can be effectively ensured to have good air performance and excellent running performance and efficiency.
Further, the upper end surface of the wheel disc 2 and the lower bottom surface 3b of the blade 3 are both flat surfaces, so that the blade 3 and the wheel disc 2 are connected stably, and the running stability of the impeller is improved. The blades 3 are fixedly connected with the annular wheel cover 1 and the wheel disc 2 respectively in a welding mode. The central angle of the upper bottom surface 3a is 30 to 45 degrees, and preferably 40 degrees.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The centrifugal fan impeller comprises an annular wheel cover (1), a wheel disc (2) and a plurality of blades (3) vertically arranged between the wheel disc (2) and the annular wheel cover (1), wherein the annular wheel cover (1) and the wheel disc (2) are parallel, the blades (3) are uniformly distributed along the circumferential direction of the annular wheel cover (1), the cross section of the annular wheel cover (1) in the axial direction is in the shape of an inwards concave circular arc, the blades (3) are inclined relative to the axis of the wheel disc (2), it is characterized in that the blade (3) is in a straight piece shape, the blade (3) is in a right trapezoid shape, the blade (3) comprises an upper bottom surface (3a) and a lower bottom surface (3b) with the length larger than that of the upper bottom surface (3a), the upper bottom surface (3a) is in a circular arc shape matched with the annular wheel cover (1), the upper bottom surface (3a) is attached to the inner side wall of the annular wheel cover (1), and the lower bottom surface (3b) is attached to the upper end surface of the wheel disc (2); the position of one side of the upper bottom surface (3a) close to the inner hole of the annular wheel cover (1) is higher than the other side of the upper bottom surface (3a), and the position of the upper bottom surface (3a) is gradually reduced from top to bottom.
2. The impeller of a centrifugal fan according to claim 1, wherein the upper end face of the disk (2) and the lower bottom face (3b) of the blade (3) are both flat.
3. The centrifugal fan impeller according to claim 1 or 2, wherein the blades (3) are fixedly connected with the annular shroud (1) and the wheel disc (2) respectively by welding.
4. The centrifugal fan impeller according to claim 1 or 2, wherein the central angle of the upper bottom surface (3a) is 30 to 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340830.XU CN211423004U (en) | 2019-12-23 | 2019-12-23 | Centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340830.XU CN211423004U (en) | 2019-12-23 | 2019-12-23 | Centrifugal fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211423004U true CN211423004U (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922340830.XU Active CN211423004U (en) | 2019-12-23 | 2019-12-23 | Centrifugal fan impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211423004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247492A (en) * | 2020-10-26 | 2021-01-22 | 航天科工哈尔滨风华有限公司 | Method for connecting impeller cover of closed impeller and impeller |
-
2019
- 2019-12-23 CN CN201922340830.XU patent/CN211423004U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247492A (en) * | 2020-10-26 | 2021-01-22 | 航天科工哈尔滨风华有限公司 | Method for connecting impeller cover of closed impeller and impeller |
| CN112247492B (en) * | 2020-10-26 | 2022-08-12 | 航天科工哈尔滨风华有限公司 | Method for connecting impeller cover of closed impeller and impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang fengke intelligent fan Co.,Ltd. Assignor: ZHEJIANG XINGYI VENTILATOR ELECTRICAL APPLIANCE Co.,Ltd. Contract record no.: X2021330000528 Denomination of utility model: Centrifugal fan impeller Granted publication date: 20200904 License type: Common License Record date: 20211021 |
|
| EE01 | Entry into force of recordation of patent licensing contract |