CN218817194U - Centrifugal impeller and multi-blade centrifugal fan - Google Patents
Centrifugal impeller and multi-blade centrifugal fan Download PDFInfo
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- CN218817194U CN218817194U CN202223059488.4U CN202223059488U CN218817194U CN 218817194 U CN218817194 U CN 218817194U CN 202223059488 U CN202223059488 U CN 202223059488U CN 218817194 U CN218817194 U CN 218817194U
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Abstract
The application relates to the field of kitchen equipment, in particular to a centrifugal impeller and a multi-wing centrifugal fan. The centrifugal impeller comprises an impeller body, the impeller body comprises an upper blade ring, a lower blade ring and a plurality of blades, and the centrifugal impeller also comprises an air guide hood; the air guide hood is arranged in the cavity of the impeller body; the edge of the air guide cover is connected with the lower ring of the blade, and a flow guide surface is formed on the outer side of the air guide cover and faces the upper ring of the blade; the flow guide surface is a convex curved surface; the blades are obliquely arranged relative to the axial direction of the impeller body; the rotating direction of the impeller body is set to be the front, and on the moving path of the blades, one end of each blade, which is connected with the lower ring of each blade, is located on the front side of the other end of each blade. This application has the slope characteristic through setting up the blade to gas can produce axial effort in the convection current way, improves the flow phenomenon of gas to the impeller chassis gathering, makes the air current distribute more evenly in the axial, reduces import impact and flow separation phenomenon, effectively reduces aerodynamic noise.
Description
Technical Field
The application relates to the field of kitchen equipment, in particular to a centrifugal impeller and a multi-wing centrifugal fan.
Background
At present, the structural design of the multi-blade centrifugal fan gradually develops towards integration and miniaturization. In order to reduce the thickness of the main machine box body, the axial size of the multi-wing centrifugal fan is reduced, and then the fan can be arranged below to a position close to the oil pan for producing smoke. According to the design theory of the centrifugal fan, if the axial size of the multi-wing centrifugal fan is reduced and the working capacity of the fan is still kept unchanged, the diameter of the impeller needs to be increased, namely the design width-diameter ratio of the impeller is reduced.
In the prior art, an air inlet is formed in only one side surface of a centrifugal fan adopting an impeller with a small width-diameter ratio, and the centrifugal fan has an obvious flow phenomenon that air is gathered to an impeller chassis, so that the inlet air flow of an impeller flow channel is not uniformly distributed in the axial direction, and the working efficiency of a centrifugal impeller is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a centrifugal impeller and multi-wing centrifugal fan for improve the impeller runner and admit air the flow and distribute the condition in the axial, promote centrifugal impeller work efficiency.
The application provides a centrifugal impeller, which comprises an impeller body, wherein the impeller body comprises an upper blade ring, a lower blade ring and a plurality of blades, and the centrifugal impeller also comprises an air guide hood;
the air guide hood is arranged in a cavity of the impeller body; the edge of the air guide cover is connected with the lower blade ring, a flow guide surface is formed on the outer side of the air guide cover, and the flow guide surface faces the upper blade ring side; the flow guide surface is an outer convex curved surface;
the blades are obliquely arranged relative to the axial direction of the impeller body; and setting the rotation direction of the impeller body to be the front, wherein on the motion path of the blades, one end of each blade, which is connected with the lower ring of the blade, is positioned at the front side of the other end of the blade.
In the above technical scheme, further, the exit edge of the blade and the axis of the centrifugal impeller form a preset included angle, and the angle of the preset included angle is between 5 ° and 15 °.
In the above technical solution, further, a plurality of the blades are uniformly arranged between the blade upper ring and the blade lower ring;
the blade upper ring and the blade lower ring are provided with a plurality of slots for fixing the blades.
In the above technical scheme, further, the blade is a sheet metal part.
In the above technical solution, further, the outer diameter of the impeller body is D 2 The axial height of the impeller body is H b The impeller body has an impeller width-diameter ratio of
The impeller width-diameter ratio is between 0.2 and 0.4.
In the above technical solution, further, the outer diameter of the impeller body is between 200mm and 400 mm.
In the above technical solution, further, the air guide hood is formed of a plastic material, the lower blade ring is formed of a metal material, and the air guide hood is connected with the lower blade ring through injection molding.
In the above technical solution, further, an accommodating cavity is formed inside the air guide cover.
In the above technical scheme, further, a shaft sleeve is arranged on the outer side of the air guide cover, a through hole is formed in the middle of the air guide cover, and the shaft sleeve is mounted at the through hole so that a cavity of the shaft sleeve is communicated with the through hole.
The application also provides a multi-wing centrifugal fan, which comprises the centrifugal impeller.
Compared with the prior art, the beneficial effect of this application is:
the application provides a centrifugal impeller has the slope characteristic through setting up the blade, can produce axial effort to gas in the runner, improves the flow phenomenon of gas to the impeller chassis gathering, makes the air current distribute more evenly in the axial, reduces import impact and flow separation phenomenon, promotes the whole work efficiency of blade, uses effectively to reduce aerodynamic noise in the slim fan of unilateral air inlet.
The application also provides a multi-wing centrifugal fan, which comprises the centrifugal impeller. Based on the analysis, the multi-wing centrifugal fan has the beneficial effects, and the description is omitted.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a first structural schematic diagram of a centrifugal impeller provided in the present application;
FIG. 2 is a second schematic structural view of a centrifugal impeller provided herein;
FIG. 3 is a schematic cross-sectional view of a multi-blade centrifugal fan according to the present disclosure;
fig. 4 is a schematic structural diagram of the external shape of the multi-blade centrifugal fan provided in the present application.
In the figure: 101-an impeller body; 102-a gas guiding hood; 103-blade upper ring; 104-lower blade ring; 105-a blade; 106-a flow guide surface; 107-motor; 108-a shaft sleeve; 109-a volute; 110-a wind-guiding ring; 111-air intake.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example one
Referring to fig. 1 to 4, the present application provides a centrifugal impeller including an impeller body 101 and an air guide shroud 102.
The impeller body 101 comprises an upper blade ring 103, a lower blade ring 104 and a plurality of blades 105 arranged between the upper blade ring 103 and the lower blade ring 104, the upper blade ring 103, the lower blade ring 104 and the plurality of blades 105 are arranged in a surrounding manner to form a cavity, the air guide cover 102 is arranged in the cavity of the impeller body 101, the edge of the air guide cover 102 is connected with the lower blade ring 104, a guide surface 106 is formed on the outer side of the air guide cover 102, and the guide surface 106 faces the upper blade ring 103 side; the flow guide surface 106 is a convex curved surface. The flow guide surface 106 is a smooth curved surface, which has a good flow guide effect, and can reduce the flow separation on the surface, thereby reducing the intake flow blockage of the impeller and reducing the aerodynamic noise.
Further, in order to make the inlet air flow of the impeller flow channel more uniformly distributed in the axial direction and improve the working efficiency of the centrifugal impeller, the blades 105 provided in the present application are inclined relative to the axial direction of the impeller body 101. Specifically, as shown in fig. 1 and 2, the rotation direction of the impeller body 101 (the rotation direction shown in the drawings is clockwise) is set to the front, and on the movement path (circumferential path) of the blades 105, one ends of the blades 105 connected to the blade lower ring 104 are located on the front side of the other ends of the blades 105.
Particularly, after the multi-wing centrifugal fan adopts the impeller with a small width-diameter ratio to reduce the axial size, the flow phenomenon that high-speed gas is gathered to the lower disc of the impeller is generated under the influence of bent flow of inlet airflow. This scheme makes blade 105 have the slope characteristic, can produce axial effort to gas in the runner, improves the flow phenomenon of gas to the gathering of impeller chassis, makes the air current distribute more evenly in the axial, reduces import impact and flow separation phenomenon, promotes blade 105 whole work efficiency, uses effectively to reduce aerodynamic noise in the slim fan of unilateral air inlet.
Specifically, as shown in fig. 2, the outlet edges of the blades 105 form a predetermined angle a with the axis of the centrifugal impeller, and the angle of the predetermined angle a is between 5 ° and 15 °.
In an alternative scheme of this embodiment, a plurality of blades 105 are uniformly arranged between the blade upper ring 103 and the blade lower ring 104, and an impeller flow passage is formed between two adjacent blades 105 to uniformly guide the airflow. The blade upper ring 103 and the blade lower ring 104 are provided with a plurality of slots for fixing the blades 105, the slots are evenly distributed on the circumference, the two ends of the blades 105 are provided with inserting pieces, and the inserting pieces are inserted into the slots, so that the blades 105 can be fixed on the blade lower ring 104 and the blade upper ring 103 according to the design position.
In the optional scheme of this embodiment, the blade 105 is a sheet metal part, the manufacturing difficulty is low, and the strength of the blade 105 is high.
In an alternative to this embodiment, as shown in fig. 2, the impeller body 101 has an outer diameter D 2 The axial height of the impeller body 101 is H b The impeller width-diameter ratio of the impeller body 101 is b,
the impeller width-diameter ratio is between 0.2 and 0.4.
The outer diameter of the impeller body 101 is between 200mm and 400 mm.
In this embodiment, the centrifugal impeller of the present application is of a small width-diameter ratio impeller structure, and the above arrangement enables the impeller structure to still have a good work capacity while satisfying the space requirement of compact structure.
Example two
The centrifugal impeller in the second embodiment is an improvement on the above-mentioned second embodiment, and the technical contents disclosed in the above-mentioned second embodiment are not described repeatedly, and the contents disclosed in the above-mentioned second embodiment also belong to the contents disclosed in the second embodiment.
In the optional scheme of this embodiment, the air guide cover 102 is formed by a plastic material, the lower blade ring 104 (specifically, a sheet metal part) is formed by a metal material, the air guide cover 102 and the lower blade ring 104 are connected into an integrated structure by injection molding, the injection molding processing mode is convenient for manufacturing, and the guide surface 106 can be kept to have higher curved surface precision, so that the guide surface 106 has a better guide effect, and the flow separation on the surface is reduced.
In the optional scheme of this embodiment, the inboard of leading gas hood 102 is formed with and holds the chamber, holds the chamber and is used for placing motor 107 to the rational utilization space, motor 107 install in holding the chamber and can drive leading gas hood 102 and rotate.
Specifically, a shaft sleeve 108 is arranged on the outer side of the air guide cover 102, a through hole is formed in the middle of the air guide cover 102, and the shaft sleeve 108 is installed at the through hole, so that a cavity of the shaft sleeve 108 is communicated with the through hole. The rotating shaft of the motor 107 can pass through the through hole to be connected with the shaft sleeve 108, so that the rotating shaft of the motor 107 is connected with the composite impeller disc, and the centrifugal impeller can be stably driven to rotate by the motor 107.
EXAMPLE III
The third embodiment of the present application provides a multi-blade centrifugal fan, including the centrifugal impeller of any one of the above embodiments, therefore, all beneficial technical effects of the centrifugal impeller of any one of the above embodiments are achieved, and the description is omitted here.
Referring to fig. 3 and 4, in an alternative solution of this embodiment, the multi-wing centrifugal fan further includes a volute 109, a motor 107, and a wind guide ring 110. The centrifugal impeller is arranged in a cavity inside the volute 109, and the air guide ring 110 is fixedly arranged on the volute 109 and plays a role of guiding airflow into the fan. The motor 107 is fixedly arranged on a motor 107 bracket of the volute 109 and provides driving force for the rotation of the fan impeller.
Furthermore, an air inlet 111 is formed in one side of the volute 109, and the motor 107 is installed on the side of the volute 109 not provided with the air inlet 111, so that the blockage of the air inlet 111 can be further reduced, and the application performance of the thin multi-wing centrifugal fan is improved.
After the assembly of each component of the centrifugal fan is completed, the motor 107 is completely arranged in the accommodating cavity, and when the motor 107 drives the impeller to rotate, the impeller and the motor 107 cannot interfere. After the air flow enters the blower through the air inlet 111, the air guide cover 102 plays a role of guiding the air flow, so that the air flow enters the impeller flow channel, is collected and guided through the volute 109 after rotating and doing work through the centrifugal impeller, and finally leaves the blower area through the air outlet.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application. Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments.
Claims (10)
1. A centrifugal impeller comprises an impeller body, wherein the impeller body comprises an upper blade ring, a lower blade ring and a plurality of blades;
the air guide hood is arranged in a cavity of the impeller body; the edge of the air guide cover is connected with the lower blade ring, a flow guide surface is formed on the outer side of the air guide cover, and the flow guide surface faces the upper blade ring side; the flow guide surface is an outer convex curved surface;
the blades are obliquely arranged relative to the axial direction of the impeller body; and setting the rotation direction of the impeller body to be the front, wherein on the motion path of the blades, one end of each blade, which is connected with the lower ring of the blade, is positioned at the front side of the other end of the blade.
2. The centrifugal impeller according to claim 1, wherein the outlet edges of the blades are at a predetermined angle with the axis of the centrifugal impeller, said predetermined angle being between 5 ° and 15 °.
3. The centrifugal impeller according to claim 1, wherein a plurality of said blades are uniformly arranged between said blade upper ring and said blade lower ring;
the blade upper ring and the blade lower ring are provided with a plurality of slots for fixing the blades.
4. The centrifugal impeller of claim 1, wherein the blades are sheet metal parts.
5. The centrifugal impeller of claim 1, wherein the impeller body has an outer diameter D 2 The axial height of the impeller body is H b The impeller body has an impeller width-diameter ratio of
The impeller width-diameter ratio is between 0.2 and 0.4.
6. The centrifugal impeller of claim 5, wherein the outer diameter of the impeller body is between 200mm and 400 mm.
7. The centrifugal impeller as recited in claim 1, wherein the air guide shroud is formed of a plastic material, the lower blade ring is formed of a metal material, and the air guide shroud is injection molded with the lower blade ring.
8. The centrifugal impeller according to claim 1, wherein the inside of the air guide shroud is formed with a receiving cavity.
9. The centrifugal impeller of claim 8, wherein a shaft sleeve is arranged on the outer side of the air guide cover, a through hole is formed in the middle of the air guide cover, and the shaft sleeve is mounted at the through hole so that a cavity of the shaft sleeve is communicated with the through hole.
10. A multi-bladed centrifugal fan comprising a centrifugal impeller according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223059488.4U CN218817194U (en) | 2022-11-17 | 2022-11-17 | Centrifugal impeller and multi-blade centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223059488.4U CN218817194U (en) | 2022-11-17 | 2022-11-17 | Centrifugal impeller and multi-blade centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN218817194U true CN218817194U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223059488.4U Active CN218817194U (en) | 2022-11-17 | 2022-11-17 | Centrifugal impeller and multi-blade centrifugal fan |
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| CN (1) | CN218817194U (en) |
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