CN209943193U - Novel fan with blade structure - Google Patents
Novel fan with blade structure Download PDFInfo
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- CN209943193U CN209943193U CN201920339350.9U CN201920339350U CN209943193U CN 209943193 U CN209943193 U CN 209943193U CN 201920339350 U CN201920339350 U CN 201920339350U CN 209943193 U CN209943193 U CN 209943193U
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Abstract
The utility model provides a novel blade structure fan belongs to engineering machine tool field, including preceding dish, back plate, wheel hub and blade, the back plate is located between preceding dish and the wheel hub, and the blade is installed between preceding dish and back plate, and the blade includes import leading edge and export trailing edge, and the center that the import leading edge is close to the preceding dish, and the contained angle of the axial lead of import leading edge and preceding dish is greater than 45 degrees, exports the trailing edge and is close to the edge of preceding dish. The utility model provides a novel blade structure fan increases the import leading edge of blade and axial lead's contained angle makes its numerical value that reaches the ideal, is greater than 45 usually. The flow stroke of the air flow passing through the inlet front edge of the blade is shorter, the flow loss of the inlet front edge can be reduced by the shorter flow stroke, the proper angle can be changed to effectively control the flow field of the blade, the air flow is improved, the adaptability of the centrifugal blade and a novel blade structure fan to different flow fields is improved, and the working efficiency of the whole machine is effectively improved.
Description
Technical Field
The utility model relates to an engineering machine tool field particularly, relates to a novel blade structure fan.
Background
At present, the main structure of an industrial centrifugal fan impeller consists of: the front disk, the blades, the rear disk and the hub. The existing centrifugal fan adopts the working principle that gas flows in the centrifugal fan, an impeller is installed in a volute, when the impeller rotates, the gas is axially sucked through the gas inlet, then the gas is turned by about 90 degrees and flows through a runner (short for short) formed by the impeller blades, and the volute concentrates and guides the gas thrown out by the impeller and discharges the gas from a gas outlet of the fan.
When the centrifugal fan blade rotates, when airflow enters the flow channel through the front edge of the centrifugal fan blade, the blade root cannot be reached in time, the blade root turns and enters the flow channel, so that the root of the front edge of the centrifugal fan blade cannot do work on the air, and the airflow is easy to generate flow separation, secondary flow and other phenomena at the front edge of the blade inlet, so that the flow loss of the front edge of the blade inlet is greatly increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flow field adaptability is better, and the import loss of flowing is littleer, the higher novel blade structure fan of complete machine efficiency.
The utility model discloses a realize like this:
based on foretell purpose, the utility model provides a novel blade structure fan, including front bezel, back plate, wheel hub and blade, the back plate is located the front bezel with between the wheel hub, the blade install in the front bezel with between the back plate, the blade includes import leading edge and export trailing edge, the import leading edge is close to the center of front bezel, just the import leading edge with the contained angle of the axial lead of front bezel is greater than 45 degrees, the export trailing edge is close to the edge of front bezel.
The utility model provides a novel blade structure fan increases the import leading edge of blade and axial lead's contained angle makes its numerical value that reaches the ideal, is greater than 45 usually. The blade more adapts to the inhomogeneous phenomenon of front plate turning department air current like this, the air current is shorter through the flow stroke of the import leading edge of blade, the flow loss of import leading edge can be reduced to shorter flow stroke, the angle that the change is fit for can make the blade control the flow field effectively, improve the air current and flow, the flow loss at import leading edge has been reduced, improve the adaptability of centrifugal blade and novel blade structure fan to different flow fields, the exact conveying capacity of centrifugal blade fan to the fluid that has improved, centrifugal impeller and centrifugal fan's application range has been widened, the effectual work efficiency who improves the complete machine.
In one implementation of this embodiment: the blade is in the projection on the back plate includes two lines, is pitch arc and straight line respectively, the pitch arc is the projection of the blade root of blade, the straight line is the projection of import leading edge, the outside orientation of pitch arc the straight line sets up.
This may further reduce flow losses at the inlet leading edge.
In one implementation of this embodiment: the arc line is positioned in front of the straight line in the rotating direction of the novel blade structure fan.
Installation this way is installed at installation.
In one implementation of this embodiment: the front disk comprises a first front piece, a second front piece and a first connecting piece, the first connecting piece is positioned between the first front piece and the second front piece, the first connecting piece is arc-shaped, and the outer side of the first connecting piece is arranged towards the rear disk; the rear disc comprises a first rear sheet, a second rear sheet and a second connecting sheet, the second connecting sheet is located between the first rear sheet and the second rear sheet, the second connecting sheet is arc-shaped, the inner side of the first connecting sheet faces the front disc, and two ends of the inlet front edge are connected with the first connecting sheet and the second connecting sheet respectively.
In one implementation of this embodiment: the central angle corresponding to the first connecting piece is 90 degrees, and the central angle corresponding to the second connecting piece is smaller than 90 degrees.
In one implementation of this embodiment: the hub comprises a connecting portion and a filling portion, the connecting portion is connected with the first rear sheet, the filling portion comprises an arc-shaped edge and a straight line edge, the arc-shaped edge is attached to the second connecting sheet, and the straight line edge is connected with the second rear sheet.
In one implementation of this embodiment: the front disc and the rear disc enclose a channel, the channel is annular along the axial lead of the front disc, the blades are arranged in a plurality of numbers, the blades are respectively positioned in the channel, the blades are arranged around the axial lead of the front disc at intervals, an air inlet is formed in the front disc, and the air inlet is communicated with the channel.
In one implementation of this embodiment: the air inlet is circular, and the air inlet and the front disc are coaxially arranged.
In one implementation of this embodiment: the included angle between the inlet front edge and the axial lead of the front disc is less than 90 degrees.
In one implementation of this embodiment: the novel fan with the blade structure further comprises a volute, and the front disc and the rear disc are installed in the volute.
Compared with the prior art, the utility model discloses the beneficial effect who realizes is:
the utility model provides a novel blade structure fan increases the import leading edge of blade and axial lead's contained angle makes its numerical value that reaches the ideal, is greater than 45 usually. The blade more adapts to the inhomogeneous phenomenon of front plate turning department air current like this, the air current is shorter through the flow stroke of the import leading edge of blade, the flow loss of import leading edge can be reduced to shorter flow stroke, the angle that the change is fit for can make the blade control the flow field effectively, improve the air current and flow, the flow loss at import leading edge has been reduced, improve the adaptability of centrifugal blade and novel blade structure fan to different flow fields, the exact conveying capacity of centrifugal blade fan to the fluid that has improved, centrifugal impeller and centrifugal fan's application range has been widened, the effectual work efficiency who improves the complete machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings which are needed to be practical in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings described below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic view of a fan with a novel blade structure provided by embodiment 1 of the present invention at a first viewing angle;
fig. 2 shows a schematic view of a blade provided by embodiment 1 of the present invention;
fig. 3 shows a schematic view of a front plate provided in embodiment 1 of the present invention;
fig. 4 shows a schematic view of a rear plate provided in embodiment 1 of the present invention;
fig. 5 shows a schematic view of a wheel hub provided in embodiment 1 of the present invention;
fig. 6 shows a schematic view of a fan with a novel blade structure provided in embodiment 1 of the present invention at a second viewing angle;
fig. 7 shows a schematic diagram of an included angle between an inlet leading edge and an axial lead provided in embodiment 1 of the present invention.
In the figure: 101-front disc; 102-a rear disc; 103-a hub; 104-a blade; 105-inlet leading edge; 106-outlet trailing edge; 107-first front panel; 108-a first connecting piece; 109-a second front panel; 110-a first backsheet; 111-a second connecting piece; 112-a second backsheet; 113-a connecting portion; 114-a filling section; 115-arc-shaped edge; 116-straight edges; 117-air inlet; 118-arc; 119-straight line.
Detailed Description
In order to make the above-mentioned problem improve, the utility model provides a novel blade structure fan, including preceding dish, back plate, wheel hub and blade, the back plate is located the preceding dish with between the wheel hub, the blade install in the preceding dish with between the back plate, the blade includes import leading edge and export trailing edge, the import leading edge is close to the center of preceding dish, just the import leading edge with the contained angle of the axial lead of preceding dish is greater than 45 degrees, the export trailing edge is close to the edge of preceding dish.
The utility model provides a novel blade structure fan increases the import leading edge of blade and axial lead's contained angle makes its numerical value that reaches the ideal, is greater than 45 usually. The blade more adapts to the inhomogeneous phenomenon of front plate turning department air current like this, the air current is shorter through the flow stroke of the import leading edge of blade, the flow loss of import leading edge can be reduced to shorter flow stroke, the angle that the change is fit for can make the blade control the flow field effectively, improve the air current and flow, the flow loss at import leading edge has been reduced, improve the adaptability of centrifugal blade and novel blade structure fan to different flow fields, the exact conveying capacity of centrifugal blade fan to the fluid that has improved, centrifugal impeller and centrifugal fan's application range has been widened, the effectual work efficiency who improves the complete machine.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the above description, in combination with the drawings in the embodiments of the present invention, clearly and completely describes the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and may, for example, be fixedly connected or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
Referring to fig. 1 to 7, the present embodiment provides a novel blade structure fan, which includes a front disk 101, a rear disk 102, a hub 103, and blades 104, wherein the rear disk 102 is located between the front disk 101 and the hub 103, the blades 104 are installed between the front disk 101 and the rear disk 102, the blades 104 include an inlet leading edge 105 and an outlet trailing edge 106, the inlet leading edge 105 is close to the center of the front disk 101, an included angle between the inlet leading edge 105 and the axial line of the front disk 101 is greater than 45 degrees, and the outlet trailing edge 106 is close to the edge of the front disk 101.
The new blade configuration fan provided by this embodiment increases the angle between the leading inlet edge 105 of the blade 104 and the shaft axis to a desired value, typically greater than 45 °. Like this blade 104 more adapts to the inhomogeneous phenomenon of front bezel 101 turning air current, the air current is shorter through the flow stroke of the import leading edge 105 of blade 104, the flow loss of import leading edge 105 can be reduced to shorter flow stroke, the angle that the change is fit for can make blade 104 control the flow field effectively, improve the air current and flow, the flow loss of import leading edge 105 department has been reduced, improve centrifugal blade 104 and novel blade structure fan to the adaptability in different flow fields, the exact conveying capacity of centrifugal blade 104 fan to the fluid that has improved, the application range of centrifugal impeller and centrifugal fan has been widened, the effectual work efficiency who improves the complete machine.
The projection of blade 104 onto rear disk 102 includes two lines, arc 118 and line 119, respectively, arc 118 being the projection of the root of blade 104, line 119 being the projection of inlet leading edge 105, the outer side of arc 118 being disposed toward line 119. This may further reduce flow losses at the inlet leading edge 105.
Camber line 118 is located in front of line 119 in the direction of rotation of the new blade configuration fan. Installation this way is installed at installation.
The front tray 101 comprises a first front panel 107, a second front panel 109 and a first connecting panel 108, the first connecting panel 108 is positioned between the first front panel 107 and the second front panel 109, the first connecting panel 108 is arc-shaped, and the outer side of the first connecting panel 108 is arranged towards the rear tray 102; the rear disc 102 comprises a first rear piece 110, a second rear piece 112 and a second connecting piece 111, the second connecting piece 111 is located between the first rear piece 110 and the second rear piece 112, the second connecting piece 111 is arc-shaped, the inner side of the first connecting piece 108 is arranged towards the front disc 101, and two ends of the inlet front edge 105 are respectively connected with the first connecting piece 108 and the second connecting piece 111.
The central angle of the first connecting piece 108 is 90 degrees, and the central angle of the second connecting piece 111 is smaller than 90 degrees.
The hub 103 includes a connection portion 113 and a filling portion 114, the connection portion 113 is connected to the first rear panel 110, the filling portion 114 includes an arc-shaped edge 115 and a straight line 119 edge 116, the arc-shaped edge 115 is attached to the second connection panel 111, and the straight line 119 edge 116 is connected to the second rear panel 112.
A channel is enclosed by the front disc 101 and the rear disc 102, the channel is annular along the axial line of the front disc 101, the vanes 104 are arranged in a plurality of numbers, the vanes 104 are respectively positioned in the channel, the vanes 104 are arranged at intervals around the axial line of the front disc 101, the front disc 101 is provided with an air inlet 117, and the air inlet 117 is communicated with the channel.
The air inlet 117 is circular, and the air inlet 117 is disposed coaxially with the front plate 101.
The inlet leading edge 105 makes an angle of less than 90 degrees with the axis of the front disk 101.
Example 2
The embodiment provides a novel fan with a blade structure, and the novel fan with the blade structure provided by the embodiment further comprises a volute, wherein the front disc 101 and the rear disc 102 are both installed in the volute.
When the air flow enters the novel blade structure fan from the inlet of the centrifugal fan, the inlet front edge 105 of the blade 104 of the fan provided by the embodiment can contact the gas flow field earlier, so that the flow stroke of the gas is shortened, the longer flow stroke can cause the flow field distribution of the gas to be disordered and uneven, even flow separation, secondary flow and other phenomena can occur, when the air flow enters the channel through the inlet front edge 105 of the centrifugal fan blade 104, the shorter flow stroke can enable the air flow to turn into the flow channel after coming to the root of the blade 104, the root of the inlet front edge 105 of the centrifugal fan blade 104 can fully do work on the gas, and the flow loss of the inlet front edge 105 of the blade 104 is greatly reduced. In addition, the earlier entry of the inlet leading edge 105 of the vane 104 into the flow field may increase the controllability of the flow field by the vane 104.
Compared with the binary blade 104 structure in the prior art, in the technical scheme provided by this embodiment, an included angle between the inlet leading edge 105 of the blade 104 and the axial line is increased by a proper method, and in order to better realize controllability of the flow field, the type of the blade 104 may be the blade 104 with the binary structure or the blade 104 with the ternary structure, so that different angles can adapt to different flow fields, and the adaptability of the centrifugal blade 104 to the flow field is stronger.
Therefore, in the present invention, a centrifugal fan impeller with better performance can be obtained. Meanwhile, the centrifugal fan impeller is particularly suitable for centrifugal fans with complex operation conditions in the metallurgy, steel and cement industries and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel blade structure fan, its characterized in that, includes preceding dish, back dish, wheel hub and blade, the back dish is located the preceding dish with between the wheel hub, the blade install in the preceding dish with between the back dish, the blade includes import leading edge and export trailing edge, the import leading edge is close to the center of preceding dish, just the import leading edge with the contained angle of the axial lead of preceding dish is greater than 45 degrees, the export trailing edge is close to the edge of preceding dish.
2. The new blade structure blower according to claim 1, wherein the projection of the blade on the rear disk includes two lines, respectively, an arc line and a straight line, the arc line is the projection of the blade root of the blade, the straight line is the projection of the inlet leading edge, and the outer side of the arc line is disposed toward the straight line.
3. The new blade structure fan in accordance with claim 2, wherein the arc is located in front of the straight line in a direction of rotation of the new blade structure fan.
4. The novel blade structure fan as claimed in claim 1, wherein the front disk comprises a first front piece, a second front piece and a first connecting piece, the first connecting piece is located between the first front piece and the second front piece, the first connecting piece is arc-shaped, and the outer side of the first connecting piece is arranged towards the rear disk; the rear disc comprises a first rear sheet, a second rear sheet and a second connecting sheet, the second connecting sheet is located between the first rear sheet and the second rear sheet, the second connecting sheet is arc-shaped, the inner side of the first connecting sheet faces the front disc, and two ends of the inlet front edge are connected with the first connecting sheet and the second connecting sheet respectively.
5. The novel blade structure fan as claimed in claim 4, wherein the first connecting piece corresponds to a central angle of 90 degrees, and the second connecting piece corresponds to a central angle of less than 90 degrees.
6. The novel blade structure fan of claim 4, wherein the hub comprises a connecting portion and a filling portion, the connecting portion is connected with the first rear sheet, the filling portion comprises an arc-shaped edge and a linear edge, the arc-shaped edge is attached to the second connecting sheet, and the linear edge is connected with the second rear sheet.
7. The fan with the novel blade structure as claimed in claim 1, wherein the front disk and the rear disk enclose a channel, the channel is annular along an axial line of the front disk, the plurality of blades are arranged, the plurality of blades are respectively located in the channel, the plurality of blades are arranged at intervals around the axial line of the front disk, and the front disk is provided with an air inlet communicated with the channel.
8. The new blade structure blower of claim 7 wherein the inlet is circular and is disposed coaxially with the front disk.
9. The new blade structure fan as claimed in claim 1, wherein the angle between the inlet leading edge and the axial lead of the front disk is less than 90 degrees.
10. The new blade structure fan of claim 1 further comprising a volute, wherein the front disk and the rear disk are both mounted within the volute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339350.9U CN209943193U (en) | 2019-03-15 | 2019-03-15 | Novel fan with blade structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920339350.9U CN209943193U (en) | 2019-03-15 | 2019-03-15 | Novel fan with blade structure |
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| CN209943193U true CN209943193U (en) | 2020-01-14 |
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| CN201920339350.9U Active CN209943193U (en) | 2019-03-15 | 2019-03-15 | Novel fan with blade structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321005A (en) * | 2022-03-01 | 2022-04-12 | 佛山市南海九洲普惠风机有限公司 | Low-noise forward-bent centrifugal fan impeller |
-
2019
- 2019-03-15 CN CN201920339350.9U patent/CN209943193U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321005A (en) * | 2022-03-01 | 2022-04-12 | 佛山市南海九洲普惠风机有限公司 | Low-noise forward-bent centrifugal fan impeller |
| CN114321005B (en) * | 2022-03-01 | 2022-05-13 | 佛山市南海九洲普惠风机有限公司 | Low-noise forward-bent centrifugal fan impeller |
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