CN216691524U

CN216691524U - Centrifugal flow-inhibiting fan

Info

Publication number: CN216691524U
Application number: CN202122792449.4U
Authority: CN
Inventors: 刘阳明; 覃万翔; 刘爱瑜; 王汉波
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-06-07
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a centrifugal flow-restraining fan, which comprises: the centrifugal impeller comprises a shaft sleeve part, a plurality of first blades and a plurality of second blades, wherein the first blades and the second blades are respectively and uniformly distributed in the circumferential direction around the axis of the centrifugal impeller, the second blades are positioned below the first blades, and the length of the outer side edge of each second blade is greater than that of the inner side edge of each second blade; the centrifugal motor is positioned below the centrifugal impeller and is connected with the shaft sleeve part; the air channel bottom plate is positioned below the centrifugal motor and fixedly connected with the centrifugal motor, and is provided with a plurality of fluid baffles which are positioned below the second blades; the centrifugal flow-inhibiting fan reduces the through-flow efficiency of the internal gas and the external gas of the fan, thereby reducing the flow loss of the internal gas and improving the working flow and the resistance performance of the fan.

Description

Centrifugal flow-inhibiting fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal flow-inhibiting fan.

Background

In the related art, when the centrifugal fan with one-way air inlet is operated, air is guided by the blades rotating at high speed and is discharged after entering the centrifugal fan, but a part of air is directly discharged through interaction between the gap between the upper end of the fan bottom plate and the lower end of the blades and the external air, so that the pressure difference between the inside and the outside is reduced, the air discharge of the centrifugal fan is reduced, and the working efficiency of the centrifugal fan is further reduced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least in part, one of the technical problems in the related art. Therefore, the utility model provides a centrifugal flow-restraining fan, wherein a plurality of fluid baffles are arranged on an air duct bottom plate of the fan, so that the through-flow efficiency of external gas inside and outside the fan is reduced, the flow loss of the internal gas is reduced, and the working flow and the resistance performance of the fan are improved.

In a first aspect, an embodiment of the present invention provides a centrifugal flow-restraining fan, including:

the centrifugal impeller comprises a shaft sleeve part, a plurality of first blades and a plurality of second blades, wherein the first blades and the second blades are respectively and uniformly distributed in the circumferential direction around the axis of the centrifugal impeller, the second blades are positioned below the first blades, and the length of the outer side edge of each second blade is greater than that of the inner side edge of each second blade;

the centrifugal motor is positioned below the centrifugal impeller and is connected with the shaft sleeve part;

the air channel bottom plate is located below the centrifugal motor and fixedly connected with the centrifugal motor, a plurality of fluid blocking bodies are arranged on the air channel bottom plate, and a gap between the upper portion of the fluid blocking bodies and the lower portion of the second blades is a flow blocking channel.

The centrifugal flow-restraining fan provided by the embodiment of the utility model at least has the following technical effects: a part of gas enters a centrifugal impeller rotating at a high speed and is discharged by being guided by blades; some gas gets into in the rotatory centrifugal impeller of high speed back, is discharged after the upper surface of wind channel bottom plate reachs the fender passageway, thereby this part gas does not lead to extravagantly through the guide of blade, and be provided with on the wind channel bottom plate and keep off the fluid, can reduce through keeping off the gaseous fuel volume of passageway, thereby reduce centrifugal impeller's inside gas and outside gas's interaction, reduce the through-flow efficiency of outside gas in the fan, reduce the flow loss of inside gas, improve the working flow and the anti-drag performance of fan.

According to some embodiments of the utility model, the fluid baffle is an annular body centered on the duct bottom plate, or a plurality of fluid baffles are circumferentially distributed around an axis of the duct bottom plate.

According to some embodiments of the utility model, the fluid stop is inclined upwardly from the outside in an inboard direction.

According to some embodiments of the utility model, the height of the highest end of the fluid baffle from the duct bottom plate is h3, and is 0.5mm < h3 < 5 mm.

According to some embodiments of the utility model, the length of the outer side is h1 and the length of the inner side is h2, such that 0.5mm < h1-h2 < 5 mm.

According to some embodiments of the utility model, the outer side is a distance r0 from the axis of the centrifugal impeller, the inner side is a distance r1 from the axis of the centrifugal impeller, and the highest end of the baffle fluid is a distance r2 from the axis of the centrifugal impeller, with r1-10mm < r2 < r 0.

According to some embodiments of the utility model, the second vane is located below a spacing of every two adjacent first vanes.

According to some embodiments of the utility model, the first blade is arcuate in cross-section and the second blade is arcuate in cross-section.

According to some embodiments of the utility model, the centrifugal impeller further comprises a plurality of reinforcing ribs distributed circumferentially around the boss portion.

According to some embodiments of the utility model, the centrifugal impeller further comprises a partition plate, the lower end of the first blade is fixedly connected with the partition plate, and the upper end of the second blade is fixedly connected with the partition plate.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a centrifugal flow-inhibiting fan in accordance with some embodiments of the utility model;

FIG. 2 is a front view of a centrifugal blower according to some embodiments of the utility model;

FIG. 3 is a top view of a centrifugal flow-inhibiting fan according to some embodiments of the utility model;

FIG. 4 is a schematic structural view of a centrifugal impeller according to some embodiments of the utility model;

FIG. 5 is a schematic illustration of the construction of a centrifugal motor and duct floor according to some embodiments of the utility model;

FIG. 6 is a front view of a centrifugal motor and duct floor according to some embodiments of the utility model;

FIG. 7 is a top view of a duct floor according to some embodiments of the utility model;

FIG. 8 is a top view of another duct floor according to some embodiments of the utility model;

FIG. 9 is a schematic illustration of a partial size of a centrifugal flow-inhibiting fan in accordance with some embodiments of the utility model;

reference numerals:

a centrifugal impeller 100, a first blade 110, a second blade 120, an outer side 121, an inner side 122, a boss portion 130, a reinforcing rib 140, a partition 150, and a shroud 160;

a centrifugal motor 200;

a duct bottom 300, a baffle 310, a first arc 311, and a baffle channel 320.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device 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 invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The embodiments of the present invention will be further explained with reference to the drawings.

According to some embodiments of the present invention, the centrifugal flow-suppressing fan includes a centrifugal impeller 100, a centrifugal motor 200, and an air duct bottom plate 300, the centrifugal impeller 100 includes a boss portion 130, a plurality of first blades 110 and a plurality of second blades 120, referring to fig. 1 and 2, the first blades 110 and the second blades 120 are respectively and uniformly distributed circumferentially around an axis of the centrifugal impeller 100, the second blades 120 are located below the first blades 110, a length of an outer side 121 of the second blades 120 is greater than a length of an inner side 122, an upper end of the first blades 110 is fixedly connected to a wheel cover 160, a lower end of the first blades 110 is fixedly connected to a partition plate 150, an upper end of the second blades 120 is fixedly connected to the partition plate 150, the centrifugal motor 200 is located below the centrifugal impeller 100, the centrifugal motor 200 is connected to the boss portion 130, the air duct bottom plate 300 is fixedly connected to a lower end of the centrifugal motor 200, the air duct bottom plate 300 is provided with a plurality of fluid-blocking bodies 310, the lower end of the second blade 120 is above the fluid baffle 310, when the centrifugal motor 200 drives the centrifugal impeller 100 to rotate, the gas enters the centrifugal impeller 100 and passes through the air duct bottom plate 300, when the gas flows out from the gap between the lower end of the second blade 120 and the upper end of the fluid baffle 310, namely the fluid baffle channel 320, most of the gas is blocked by the fluid baffle 310 and returns, the interaction between the internal gas of the centrifugal impeller 100 and the external gas is reduced, the through-flow efficiency of the internal gas and the external gas is reduced, the flow loss of the internal gas is reduced, and the working flow and the anti-resistance of the centrifugal flow-restraining fan are improved.

According to some embodiments of the utility model, the first blade 110 is arcuate in cross-section. Referring to fig. 3, when the centrifugal impeller 100 rotates, the arc shape of the first blade 110 functions to guide gas, thereby improving work efficiency.

According to some embodiments of the utility model, the second blade 120 is arcuate in cross-section. When the centrifugal impeller 100 rotates, the arc shape of the second blades 120 plays a role of guiding gas, thereby improving working efficiency.

According to some embodiments of the present invention, the centrifugal impeller 100 includes a plurality of ribs 140, the ribs 140 are distributed around the shaft sleeve portion 130, and referring to fig. 3 and 4, three ribs 140 are uniformly distributed around the shaft sleeve portion 130, one side of each rib 140 is fixedly connected to the wheel cover 160, and the other side of each rib 140 is fixedly connected to the shaft sleeve portion 130, and the ribs 140 can increase the rigidity of the shaft sleeve portion 130.

According to some embodiments of the present invention, referring to fig. 5 to 7, the duct bottom 300 is provided with a baffle 310, and the baffle 310 is an annular body inclined upward from the outside along the inside. Referring to fig. 6, the baffle 310 includes a first arc line 311, and the first arc line 311 is inclined upward from the outer side along the inner side. It should be noted that the shape of the first arc 311 may be changed as required, and the first arc 311 may be a straight line, a circular arc, or a combination of straight lines, a combination of circular arcs, a combination of straight lines and circular arcs, or the like.

It should also be noted that there may be more than one baffle 310, and referring to fig. 8, there are four baffles 310, and the baffles 310 are circumferentially distributed around the axis of the duct bottom 300.

According to some embodiments of the present invention, the centrifugal impeller 100 includes a base plate, and referring to fig. 4, a lower end of the first blade 110 is fixedly connected to the base plate, an upper end of the second blade 120 is fixedly connected to the base plate, and a length of the first blade 110 is greater than a length of the second blade 120.

According to some embodiments of the present invention, referring to fig. 4, the second blade 120 is located below the interval between every two adjacent first blades 110, the first blades 110 and the second blades 120 are distributed in a staggered manner, when the centrifugal impeller 100 rotates at a high speed, the airflow formed by the first blades 110 and the second blades 120 is inconsistent, the airflow formed by the second blades 120 is blocked by the airflow of the first blades 110 and is blocked by the baffle fluid 310, and the interaction of the gas from the baffle channel 320 with the outside gas is reduced.

According to some embodiments of the present invention, referring to FIG. 9, the length of the outer side 121 is h1 and the length of the inner side 122 is h2, satisfying 0.5mm < h1-h2 < 5 mm.

According to some embodiments of the present invention, referring to FIG. 9, the height of the highest end of the baffle fluid 310 from the duct floor 300 is h3, which satisfies 0.5mm < h3 < 5 mm.

According to some embodiments of the present invention, referring to fig. 9, the distance of the outer side 121 from the axis of the heart impeller 100 is r0, the distance of the inner side 122 from the axis of the heart impeller 100 is r1, and the distance of the highest end of the baffle fluid 310 from the axis of the centrifugal impeller 100 is r2, which satisfies that r1-10mm < r2 < r 0.

It can be understood that the size of the flow blocking channel 320 can be affected by changing h1, h2, h3, r0, r1 and r2, and the relationship between the flow blocking channel 320 and the outside air can be limited, so that the flow-through efficiency of the air inside the impeller and the outside air through the flow blocking channel 320 can be reduced, the pressure difference between the inside and the outside of the bottom of the centrifugal impeller 100 can be increased, the confluence of the air outside the centrifugal impeller 100 and the inside of the shroud 160 can be reduced, the effect of reducing the internal flow loss can be achieved, and the working flow rate and the resistance performance of the fan can be improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A centrifugal flow-inhibiting fan, comprising:

the centrifugal impeller (100) comprises a shaft sleeve part (130), a plurality of first blades (110) and a plurality of second blades (120), wherein the first blades (110) and the second blades (120) are respectively and uniformly distributed in the circumferential direction around the axis of the centrifugal impeller (100), the second blades (120) are positioned below the first blades (110), and the length of the outer side edge (121) of each second blade (120) is greater than that of the inner side edge (122);

a centrifugal motor (200) located below the centrifugal impeller (100), the centrifugal motor (200) being connected to the boss portion (130);

the air duct bottom plate (300) is located below the centrifugal motor (200), the air duct bottom plate (300) is fixedly connected with the centrifugal motor (200), the air duct bottom plate (300) is provided with a plurality of fluid blocking bodies (310), and a gap between the upper portion of the fluid blocking bodies (310) and the lower portion of the second blades (120) is a flow blocking channel (320).

2. The centrifugal flow-suppressing fan as recited in claim 1, wherein the fluid-retaining body (310) is an annular body centered on the duct bottom plate (300), or a plurality of fluid-retaining bodies (310) are circumferentially distributed around an axis of the duct bottom plate (300).

3. The centrifugal flow-suppressing fan as recited in claim 2, wherein the baffle (310) is inclined upwardly from an outer side in an inner direction.

4. The centrifugal flow-suppressing fan as recited in claim 1, wherein the height of the highest end of the baffle (310) from the duct floor (300) is h3, 0.5mm < h3 < 5 mm.

5. The centrifugal flow-suppressing fan as claimed in claim 1, wherein the outer side (121) has a length h1 and the inner side (122) has a length h2, such that 0.5mm < h1-h2 < 5 mm.

6. The centrifugal flow-suppressing fan as claimed in claim 3, wherein the outer side edge (121) is at a distance r0 from the axis of the centrifugal impeller (100), the inner side edge (122) is at a distance r1 from the axis of the centrifugal impeller (100), and the highest end of the baffle fluid (310) is at a distance r2 from the axis of the centrifugal impeller (100), such that r1-10mm < r2 < r 0.

7. The centrifugal flow-suppressing fan of claim 1, wherein the second blades (120) are located below the spacing of each two adjacent first blades (110).

8. The centrifugal flow-inhibiting fan of claim 1 wherein the first blade (110) is arcuate in cross-section and the second blade (120) is arcuate in cross-section.

9. The centrifugal flow-suppressing fan as recited in claim 1, wherein the centrifugal impeller (100) further comprises a plurality of ribs (140), the ribs (140) being distributed circumferentially around the boss portion (130).

10. The centrifugal flow-suppressing fan as recited in any one of claims 1 to 9, wherein the centrifugal impeller (100) further comprises a partition plate (150), a lower end of the first blade (110) is fixedly connected with the partition plate (150), and an upper end of the second blade (120) is fixedly connected with the partition plate (150).