CN217029401U - Backward centrifugal wind wheel and centrifugal fan - Google Patents

Abstract

The utility model discloses a backward centrifugal wind wheel and a centrifugal fan, wherein the backward centrifugal wind wheel comprises: a chassis; the air inlet guide ring is positioned above the chassis; the blade group comprises a plurality of blades, the blades are arranged between the chassis and the air inlet guide ring, one ends of the blades, far away from the axis of the chassis, are provided with convex parts and concave parts, and the convex parts are positioned above the concave parts; half of the arc length of the convex part is h1, half of the arc length of the concave part is h2, and h2 is more than h 1; the linearity of the tail edge of the blade of the backward centrifugal wind wheel adopts an S shape, so that the pneumatic performance and the noise of the backward centrifugal wind wheel can be improved.

Description

Backward centrifugal wind wheel and centrifugal fan

Technical Field

The utility model relates to the technical field of wind wheels, in particular to a backward centrifugal wind wheel and a centrifugal fan.

Background

In the related art, most of the linear shapes of the tail ends of the blades of the centrifugal wind wheel are straight lines or arc lines, and when the centrifugal wind wheel works, huge noise can be generated due to impact friction between the blades and air, vortex generated in the wind wheel and the like, and the pneumatic performance of the centrifugal wind wheel is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model provides a backward centrifugal wind wheel and a centrifugal fan, wherein the tail edge of a blade of the backward centrifugal wind wheel is in an S shape linearly, so that the pneumatic performance of the backward centrifugal wind wheel can be improved, and the noise can be reduced.

In a first aspect, embodiments of the present invention provide a backward centrifugal wind wheel, including:

a chassis;

the air inlet guide ring is positioned above the chassis;

the blade group comprises a plurality of blades, the blades are arranged between the chassis and the air inlet guide ring, the blades are uniformly distributed in the circumferential direction around the axis of the chassis, one end of each blade, far away from the axis of the chassis, is provided with a convex part and a concave part, and the convex part is positioned above the concave part;

half of the arc length of the convex part is h1, half of the arc length of the concave part is h2, and h2 is more than h 1.

The backward centrifugal wind wheel provided by the embodiment of the utility model at least has the following technical effects: this backward centrifugal wind wheel 'S blade is kept away from the one end of chassis axis and is provided with convex part and concave part, and the convex part is located the top of concave part, and the linearity of blade trailing edge is "S" shape promptly, and the length of convex part is greater than the degree of depth of concave part, and this kind of design has improved backward centrifugal wind wheel' S aerodynamic performance, has reduced the noise that backward centrifugal wind wheel produced at the during operation.

According to some embodiments of the utility model, the height of the blade is h, satisfying:

according to some embodiments of the utility model, the cross-section of the blade is curved.

According to some embodiments of the utility model, the chassis comprises a first area and a second area, the first area comprising a concave fillet smoothly connecting with the second area.

According to some embodiments of the utility model, the blade is fixedly connected to the second region.

In a second aspect, embodiments of the present invention further provide a centrifugal wind turbine including a backward centrifugal wind turbine according to embodiments of the first aspect of the present invention.

The centrifugal fan provided by the embodiment of the utility model at least has the following technical effects: centrifugal fan has installed this back centrifugal wind wheel, and the one end that the chassis axis was kept away from to the blade of back centrifugal wind wheel is provided with convex part and concave part, and the convex part is located the top of concave part, and the linearity of blade trailing edge is "S" shape promptly, and the length of convex part is greater than the degree of depth of concave part, and this kind of design has improved the aerodynamic performance to centrifugal wind wheel, has reduced the noise that produces to centrifugal wind wheel at the during operation after.

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 diagram of a rearward facing centrifugal wind wheel according to some embodiments of the utility model;

FIG. 2 is a schematic view of another angle configuration of a rearward facing centrifugal wind rotor according to some embodiments of the present invention;

FIG. 3 is a front view of a rearward centrifugal wind rotor of some embodiments of the present invention;

FIG. 4 is a top view of a rearward centrifugal wind rotor of some embodiments of the present invention;

FIG. 5 is a schematic view of a hidden air intake runner of an aft centrifugal wind wheel according to some embodiments of the utility model;

FIG. 6 is a top view of a hidden air intake runner of an aft centrifugal wind wheel according to some embodiments of the utility model;

FIG. 7 is a front view of a hidden air intake guide ring of a rearward facing centrifugal wind wheel according to some embodiments of the utility model;

FIG. 8 is a front view of one of the vanes of some embodiments of the present invention;

FIG. 9 is a top view of one of the vanes of some embodiments of the present invention;

FIG. 10 is a schematic view of another aft centrifugal wind rotor according to some embodiments of the utility model;

FIG. 11 is a schematic view of another angle configuration of an alternative backward centrifugal wind rotor according to some embodiments of the present invention;

FIG. 12 is a front view of another aft centrifugal wind rotor according to some embodiments of the utility model;

figure 13 is a top view of another aft centrifugal wind rotor according to some embodiments of the utility model.

Reference numbers:

the air intake device comprises a chassis 100, an air intake guide ring 110, a blade 120, a convex part 121, a concave part 122, a first area 130, a second area 140 and an inward concave fillet 150.

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.

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 backward centrifugal wind rotor includes a base plate 100, an intake guide ring 110 and a plurality of blades 120, referring to fig. 1 to 4, the intake guide ring 110 is positioned above the base plate 100, upper sides of the blades 120 are fixedly connected to the intake guide ring 110, and lower sides of the blades 120 are fixedly connected to the base plate 100. One end of the blade 120 far away from the axis of the chassis 100, namely the tail edge of the blade 120, is provided with a convex part 121 and a concave part 122, the convex part 121 is positioned above the concave part 122, and referring to fig. 8, half of the arc length of the convex part 121 is h1, and half of the arc length of the concave part 122 is h2, so that h2 > h 1.

It can be understood that the combination of the convex portion 121 and the concave portion 122 at the trailing edge of the blade 120 is in an "S" shape, when the backward centrifugal wind wheel rotates at a high speed, the air enters the backward centrifugal wind wheel from the opening of the air intake guide ring 110, and due to the arrangement of the convex portion 121 and the concave portion 122 at the trailing edge of the blade 120, the air is rapidly discharged from the concave portion 122, so that the possibility of generating vortex is reduced, noise is reduced, and fan efficiency is improved.

Referring to fig. 8, the horizontal distance between the rightmost side of the protrusion 121 and the starting point of the upper side of the blade 120, which just starts to curve, is h3, the horizontal distance between the rightmost side of the protrusion 121 and the leftmost side of the recess 122 is h4, and h3 and h4 correspond to a line segment respectively; referring to fig. 9, the blade 120 is a curved arc, so that the length h1 of the convex portion 121 and the depth h2 of the concave portion 122 correspond to an arc respectively, two endpoints of a line segment corresponding to h3 are two endpoints of an arc corresponding to h1, two endpoints of a line segment corresponding to h4 are two endpoints of an arc corresponding to h2, that is, the length h1 of the convex portion 121 is greater than h3, and the depth h2 of the concave portion 122 is greater than h 4. It is noted that the present invention refers to the length of the protrusion 121 being h1 instead of h3 and the depth of the recess 122 being h2 instead of h 4.

According to some embodiments of the utility model, the blades 120 are evenly distributed circumferentially about the axis of the chassis 100. Referring to fig. 5 and 6, there are seven blades 120, and the seven blades 120 are circumferentially distributed around the axis of the base pan 100 so that the gas can be uniformly discharged.

According to some embodiments of the present invention, the blades 120 are arcuate in cross-section, and referring to fig. 5 and 6, there are seven blades 120, and each blade 120 is an arcuate blade 120. The arc-shaped blades 120 guide the gas, so that the resistance to the gas flow can be reduced.

According to some embodiments of the present invention, referring to fig. 1, 2 and 5, the chassis 100 includes a first area 130 and a second area 140, the first area 130 includes a concave fillet 150, the concave fillet 150 is smoothly connected with the second area 140, and the concave fillet 150 has a guiding effect on the gas.

It can be understood that the air enters from the opening of the air inlet guide ring 110 and flows through the first region 130, the concave fillet 150, the second region 140 and the surface of the blade 120, and the smooth connection between the concave fillet 150 and the second region 140 reduces the impact of the air.

According to some embodiments of the utility model, referring to fig. 5, the underside of the blade 120 is fixedly connected with the second region 140.

According to some embodiments of the present invention, referring to fig. 3, 7 and 8, the vertical distance between the blade 120 from the upper surface of the chassis 100 to the lower surface of the air inlet guide ring 110 is the height h of the blade 120, and satisfies:

it is understood that the height h of the blade 120 affects the amount of air output, and the length h1 of the convex portion 121 and the depth h2 of the concave portion 122 of the trailing edge of the blade 120 affect the air pressure when:

and when h2 is more than h1, the air enters the backward centrifugal wind wheel and is discharged through the surface of the blade 120, and compared with the original centrifugal wind wheel, the aerodynamic performance of the centrifugal wind wheel is improved, and the noise is reduced.

According to some embodiments of the utility model, referring to fig. 10 to 13, the blades 120 of the backward centrifugal wind rotor are distributed with a clockwise curvature around the axis of the chassis 100, and it can be understood that the distribution of the blades 120 with a clockwise or counterclockwise curvature around the axis of the chassis 100 can be adjusted according to the requirement.

It should be noted that, when the lower surface of the air inlet guide ring 110 is not parallel to the upper surface of the chassis 100, for example, when the air inlet guide ring 110 is inclined downward from the inside to the outside, the vertical distance from the upper surface of the chassis 100 to the bottommost end of the air inlet guide ring 110 is the height h of the blade 120.

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 (6)

1. A backward centrifugal wind wheel, comprising:

a chassis (100);

the air inlet guide ring (110) is positioned above the chassis (100);

the blade group comprises a plurality of blades (120), the blades (120) are arranged between the chassis (100) and the air inlet guide ring (110), the blades (120) are circumferentially and uniformly distributed around the axis of the chassis (100), one end, far away from the axis of the chassis (100), of each blade (120) is provided with a convex part (121) and a concave part (122), and the convex part (121) is positioned above the concave part (122);

half of the arc length of the convex part (121) is h1, half of the arc length of the concave part (122) is h2, and h2 is more than h 1.

2. Backward centrifugal wind rotor according to claim 1, characterized in that the height of the blades (120) is h, satisfying:

3. a backward centrifugal wind rotor according to claim 1, characterized in that the blades (120) are arc-shaped in cross-section.

4. Backward centrifugal wind rotor according to claim 1, wherein the chassis (100) comprises a first area (130) and a second area (140), the first area (130) comprising an inwardly concave fillet (150), the inwardly concave fillet (150) being smoothly connected with the second area (140).

5. Backward centrifugal wind rotor according to claim 4, characterized in that the blades (120) are fixedly connected with the second zone (140).

6. A centrifugal wind turbine comprising a backward centrifugal wind rotor according to any one of claims 1 to 5.

Images