CN220581333U - High-performance centrifugal fan and centrifugal fan - Google Patents
High-performance centrifugal fan and centrifugal fan Download PDFInfo
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- CN220581333U CN220581333U CN202321613886.8U CN202321613886U CN220581333U CN 220581333 U CN220581333 U CN 220581333U CN 202321613886 U CN202321613886 U CN 202321613886U CN 220581333 U CN220581333 U CN 220581333U
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Abstract
The utility model discloses a high-performance centrifugal fan and a centrifugal fan, wherein the high-performance centrifugal fan comprises: a middle plate; the first frame is positioned above the middle plate, the first frame and the middle plate are coaxially arranged, connecting ribs are arranged on the inner side of the first frame, and a plurality of connecting ribs are circumferentially distributed around the axis of the first frame; the first blades are circumferentially distributed around the axis of the middle disc, and the connecting ribs are in one-to-one correspondence with the first blades; the upper end of one side of the first blade far away from the axis of the middle disc is fixedly connected with the connecting rib, and the lower end of the first blade is fixedly connected with the middle disc; the effective external diameter of first blade is phi 4, and the internal diameter of well dish is phi 5, satisfies: phi is more than 0 and less than or equal to 5-phi 4mm; the connecting ribs can enhance the connection strength of the first blades and the first frame, improve the die opening difficulty of the fan and improve the production efficiency; meanwhile, phi 5-phi 4 is ensured to be less than or equal to 4mm, so that the influence on working efficiency caused by the reduction of working area of the blade due to the fact that the connecting ribs are too large is avoided.
Description
Technical Field
The utility model relates to the technical field of fans, in particular to a high-performance centrifugal fan and a centrifugal fan.
Background
When the centrifugal fan is in operation, air enters the centrifugal fan and is then guided by the blades rotating at high speed to be discharged, and in the process, the connection strength between the blades and the fan frame is particularly critical so as to prevent the blades from falling off; meanwhile, the working efficiency of the fan needs to be improved while the connection strength is ensured.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model provides a high-performance centrifugal fan and a centrifugal fan.
In a first aspect, embodiments of the present utility model provide a high performance centrifugal fan, the high performance centrifugal fan comprising:
a middle plate;
the first frame is positioned above the middle plate, the first frame and the middle plate are coaxially arranged, connecting ribs are arranged on the inner side of the first frame, and a plurality of connecting ribs are circumferentially distributed around the axis of the first frame;
the first blades are circumferentially distributed around the axis of the middle disc, and the connecting ribs are in one-to-one correspondence with the first blades; the upper end of one side of the first blade far away from the axis of the middle disc is fixedly connected with the connecting rib, and the lower end of the first blade is fixedly connected with the middle disc;
the effective external diameter of first blade is phi 4, the internal diameter of well dish is phi 5, satisfies: phi is more than 0 and less than or equal to 5-phi 4mm.
The high-performance centrifugal fan provided by the embodiment of the utility model has at least the following technical effects: the connecting ribs can enhance the connection strength of the first blades and the first frame, improve the die opening difficulty of the fan and improve the production efficiency; meanwhile, phi 5-phi 4 is ensured to be less than or equal to 4mm, so that the influence on working efficiency caused by the reduction of working area of the blade due to the fact that the connecting ribs are too large is avoided.
According to some embodiments of the utility model, the first blade comprises a pressure side and a suction side; on the projection plane perpendicular to the axis of the middle plate, the pressure surface comprises a first arc and a second arc, the suction surface comprises a third arc and a fourth arc, the pressure surface is connected with the suction surface through a fifth arc, two ends of the first arc are respectively connected with the connecting rib and the second arc, two ends of the fifth arc are respectively connected with the second arc and the fourth arc, and two ends of the third arc are respectively connected with the fourth arc and the connecting rib.
According to some embodiments of the utility model, the radius of the first arc is R1, the arc length is K1, and the radius of the second arc is R2, the arc length is K2, satisfying:
according to some embodiments of the utility model, the radius of the third arc is R3, the arc length is K3, the radius of the fourth arc is R4, the arc length is K4, and the following are satisfied:
according to some embodiments of the utility model, the airflow inlet angle of the first blade is θ1, which satisfies: the air flow outlet angle of the first blade is theta 2 and is more than or equal to 75 degrees and less than or equal to 90 degrees, and the air flow outlet angle of the first blade is theta 2, so that the following conditions are satisfied: and theta 2 is more than or equal to 154 degrees and less than or equal to 164 degrees.
According to some embodiments of the utility model, the distance between the trailing edges of the pressure surfaces of two adjacent first blades is a pitch, the pitch is L1, and the chord length of the first blades isL2, satisfy:
according to some embodiments of the utility model, the first vane has an effective inner diameter of φ 3, satisfying:
according to some embodiments of the utility model, the first blade has a maximum thickness L3 and a minimum thickness L4, satisfying:
according to some embodiments of the present utility model, the device further comprises a second frame and a plurality of second blades, the second frame is located below the middle plate, the second frame and the middle plate are coaxially arranged, the connecting ribs are arranged on the inner side of the second frame, and the plurality of connecting ribs are circumferentially distributed around the axis of the second frame; the second blades are circumferentially distributed around the axis of the middle disc, and the connecting ribs positioned on the second frame are in one-to-one correspondence with the second blades; the lower end of one side of the second blade far away from the axis of the middle disc is fixedly connected with the connecting rib positioned on the second frame, and the upper end of the second blade is fixedly connected with the middle disc; the plurality of first blades and the plurality of second blades are circumferentially staggered around the axis of the middle plate.
In a second aspect, an embodiment of the present utility model further provides a centrifugal fan, including a high performance centrifugal fan according to the embodiment of the first aspect of the present utility model.
The centrifugal fan provided by the embodiment of the utility model has at least the following technical effects:
additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a high performance centrifugal fan according to some embodiments of the utility model;
FIG. 2 is a schematic view of another angular configuration of a high performance centrifugal fan according to some embodiments of the utility model;
FIG. 3 is a schematic cross-sectional view of a high performance centrifugal fan according to some embodiments of the utility model;
FIG. 4 is an enlarged schematic view at A of FIG. 3;
fig. 5 is a schematic view of the structure of a first blade and a connecting rib according to some embodiments of the present utility model.
Reference numerals:
the middle disc 100, the first frame 110, the first blade 120, the pressure surface 121, the suction surface 122, the second frame 130, the second blade 140 and the connecting rib 150;
a first arc 210, a second arc 220, a third arc 230, a fourth arc 240, a fifth arc 250;
a first line 310, a second line 320, a third line 330, a fourth line 340.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element 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 utility model.
In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Embodiments of the present utility model will be further described below with reference to the accompanying drawings.
According to some embodiments of the present utility model, referring to fig. 1 to 3, a high performance centrifugal fan includes a middle tray 100, a first rim 110, and a plurality of first blades 120. The first frame 110 is located above the middle plate 100, the first frame 110 is annular, the first frame 110 and the middle plate 100 are coaxially arranged, connecting ribs 150 are arranged on the inner side of the first frame 110, and a plurality of connecting ribs 150 are circumferentially distributed around the axis of the first frame 110. The plurality of first blades 120 are circumferentially distributed around the axis of the middle plate 100, and the plurality of connecting ribs 150 are in one-to-one correspondence with the plurality of first blades 120; the upper end of one side of the first blade 120 far away from the axis of the middle plate 100 is fixedly connected with the connecting rib 150, and the lower end of the first blade 120 is fixedly connected with the middle plate 100. The first vane 120 has an effective outer diameter of phi 4 and the inner diameter of the middle disk 100 is phi 5, satisfying: phi is more than 0 and less than or equal to 5-phi 4mm.
It can be appreciated that the connection rib 150 can enhance the connection strength between the first blade 120 and the first frame 110, and improve the difficulty of mold opening of the fan and improve the production efficiency; meanwhile, phi 5-phi 4 is ensured to be less than or equal to 4mm, so that the influence on working efficiency caused by the reduction of working area of the blade due to the fact that the connecting ribs 150 are too large is avoided.
According to some embodiments of the utility model, referring to fig. 4 and 5, the first blade 120 comprises a pressure side 121 and a suction side 122. On a projection plane perpendicular to the axis of the middle plate 100, referring to fig. 5, the pressure surface 121 includes a first arc 210 and a second arc 220, the suction surface 122 includes a third arc 230 and a fourth arc 240, the pressure surface 121 and the suction surface 122 are connected through a fifth arc 250, two ends of the first arc 210 are respectively connected with the connecting rib 150 and the second arc 220, two ends of the fifth arc 250 are respectively connected with the second arc 220 and the fourth arc 240, and two ends of the third arc 230 are respectively connected with the fourth arc 240 and the connecting rib 150.
Referring to fig. 5, an arc between points a and B is a first arc 210, an arc between points B and C is a second arc 220, an arc between points C and D is a fifth arc 250, an arc between points D and E is a fourth arc 240, and an arc between points E and F is a third arc 230.
Preferably, the radius of the first arc 210 is R1, the arc length is K1, the radius of the second arc 220 is R2, and the arc length is K2, satisfying:thereby improving the working capacity of the fan and improving the air output and the working efficiency of the fan.
Preferably, the radius of the third arc 230 is R3, the arc length is K3, the radius of the fourth arc 240 is R4, and the arc length is K4, satisfying the following conditions:thereby improving the working capacity of the fan and improving the air output and the working efficiency of the fan.
Preferably, the airflow inlet angle of the first blade 120 is θ1, which satisfies: the air flow outlet angle of the first blade 120 is theta 2 and is 75 degrees or more and theta 1 degrees or less and 90 degrees, and the air flow outlet angle satisfies the following conditions: and theta 2 is more than or equal to 154 degrees and less than or equal to 164 degrees. And further effectively inhibit the separation phenomenon of the air flow in the flow channel, improve the acting capacity of the fan and improve the air output and the working efficiency of the fan.
Note that θ1 is an angle between the first line 310 and the second line 320. The first line 310 is a line passing through point C in the rotation direction, and a line connecting the center O point and point C of the fan is perpendicular to the first line 310. The second line 320 is a tangent to the leading edge of the pressure surface 121 passing through point C.
It should be further noted that θ2 is an angle between the third line 330 and the fourth line 340. The third line 330 is a line passing through the point a in the opposite direction of the rotation direction, and the line between the center O point of the fan and the point a is perpendicular to the third line 330. The fourth line 340 is a tangent to the trailing edge of the pressure face 121 passing through point a.
Preferably, referring to fig. 4, the distance between the trailing edges of the pressure surfaces 121 of two adjacent first blades 120 is a pitch, the pitch is L1, and the chord length of the first blade 120 is L2, so that:and further effectively inhibit the separation phenomenon of the air flow in the flow channel, improve the acting capacity of the fan and improve the air output and the working efficiency of the fan.
According to some embodiments of the utility model, referring to fig. 3, the effective outer diameter of the first vane 120 is Φ4, and the effective inner diameter of the first vane 120 is Φ3, satisfying:thereby improving the working capacity of the fan and improving the air output and the working efficiency of the fan.
According to some embodiments of the utility model, referring to fig. 5, the maximum thickness of the first blade 120 is L3 and the minimum thickness of the first blade 120 is L4. The thickness of the first blade 120 increases and then decreases in a direction gradually approaching the axis of the center plate 100. While the minimum thickness of the first blade 120 is located on the side away from the axis of the center plate 100. The method meets the following conditions:the working capacity of the fan can be improved, and the air output and the working efficiency of the fan are improved.
According to some embodiments of the present utility model, referring to fig. 1 and 2, the high performance centrifugal fan further includes a second rim 130 and a plurality of second blades 140, the second rim 130 is located below the middle plate 100, the second rim 130 is coaxially disposed with the middle plate 100, a connection rib 150 is disposed at an inner side of the second rim 130, and the plurality of connection ribs 150 are circumferentially distributed around an axis of the second rim 130. The plurality of second blades 140 are circumferentially distributed around the axis of the middle plate 100, and the plurality of connection ribs 150 located at the second rim 130 are in one-to-one correspondence with the plurality of second blades 140. The lower end of the side of the second blade 140 away from the axis of the middle disc 100 is fixedly connected with the connecting rib 150 positioned on the second frame 130, and the upper end of the second blade 140 is fixedly connected with the middle disc 100.
Preferably, the plurality of first blades 120 and the plurality of second blades 140 are circumferentially staggered about the axis of the midplane 100.
Preferably, the profile parameters of the second blade 140 are the same as those of the first blade 120, and will not be described herein.
In the description of the present specification, reference to the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A high performance centrifugal fan, comprising:
a middle plate (100);
the first frame (110) is positioned above the middle disc (100), the first frame (110) and the middle disc (100) are coaxially arranged, connecting ribs (150) are arranged on the inner side of the first frame (110), and a plurality of connecting ribs (150) are circumferentially distributed around the axis of the first frame (110);
the first blades (120), a plurality of the first blades (120) are circumferentially distributed around the axis of the middle disc (100), and a plurality of the connecting ribs (150) are in one-to-one correspondence with a plurality of the first blades (120); the upper end of one side, far away from the axis of the middle disc (100), of the first blade (120) is fixedly connected with the connecting rib (150), and the lower end of the first blade (120) is fixedly connected with the middle disc (100);
the effective outer diameter of the first blade (120) is phi 4, and the inner diameter of the middle disc (100) is phi 5, which satisfies the following conditions: phi is more than 0 and less than or equal to 5-phi 4mm.
2. The high performance centrifugal fan according to claim 1, wherein the first blade (120) comprises a pressure side (121) and a suction side (122); on the projection plane perpendicular to the axis of the middle plate (100), the pressure surface (121) comprises a first circular arc (210) and a second circular arc (220), the suction surface (122) comprises a third circular arc (230) and a fourth circular arc (240), the pressure surface (121) is connected with the suction surface (122) through a fifth circular arc (250), two ends of the first circular arc (210) are respectively connected with the connecting rib (150) and the second circular arc (220), two ends of the fifth circular arc (250) are respectively connected with the second circular arc (220) and the fourth circular arc (240), and two ends of the third circular arc (230) are respectively connected with the fourth circular arc (240) and the connecting rib (150).
3. The high performance centrifugal fan according to claim 2, wherein the radius of the first arc (210) is R1 and the arc length is K1, and the radius of the second arc (220) is R2 and the arc length is K2, satisfying:
4. the high performance centrifugal fan according to claim 2, wherein the radius of the third arc (230) is R3 and the arc length is K3, and the radius of the fourth arc (240) is R4 and the arc length is K4, satisfying:
5. the high performance centrifugal fan according to claim 1, wherein the airflow inlet angle of the first blade (120) is θ1, satisfying: and the air flow outlet angle of the first blade (120) is theta 2 and is more than or equal to 75 degrees and less than or equal to 90 degrees, and the requirements are as follows: and theta 2 is more than or equal to 154 degrees and less than or equal to 164 degrees.
6. The high performance centrifugal fan according to claim 2, wherein the distance between the trailing edges of the pressure surfaces (121) of two adjacent first blades (120) is a pitch, the pitch is L1, and the chord length of the first blades (120) is L2, satisfying:
7. the high performance centrifugal fan according to claim 1, wherein the first blades (120) have an effective inner diameter of Φ3, satisfying:
8. the high performance centrifugal fan according to claim 1, wherein the maximum thickness of the first blade (120) is L3 and the minimum thickness of the first blade (120) is L4, satisfying:
9. the high-performance centrifugal fan according to claim 1, further comprising a second rim (130) and a plurality of second blades (140), wherein the second rim (130) is located below the middle disk (100), the second rim (130) is coaxially arranged with the middle disk (100), the connecting ribs (150) are arranged on the inner side of the second rim (130), and the plurality of connecting ribs (150) are circumferentially distributed around the axis of the second rim (130); the second blades (140) are circumferentially distributed around the axis of the middle disc (100), and the connecting ribs (150) positioned on the second frame (130) are in one-to-one correspondence with the second blades (140); the lower end of one side, far away from the axis of the middle disc (100), of the second blade (140) is fixedly connected with the connecting rib (150) positioned on the second frame (130), and the upper end of the second blade (140) is fixedly connected with the middle disc (100); the plurality of first blades (120) and the plurality of second blades (140) are circumferentially staggered about the axis of the mid-disk (100).
10. A centrifugal fan comprising a high performance centrifugal fan according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321613886.8U CN220581333U (en) | 2023-06-21 | 2023-06-21 | High-performance centrifugal fan and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321613886.8U CN220581333U (en) | 2023-06-21 | 2023-06-21 | High-performance centrifugal fan and centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN220581333U true CN220581333U (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321613886.8U Active CN220581333U (en) | 2023-06-21 | 2023-06-21 | High-performance centrifugal fan and centrifugal fan |
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| Country | Link |
|---|---|
| CN (1) | CN220581333U (en) |
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2023
- 2023-06-21 CN CN202321613886.8U patent/CN220581333U/en active Active
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