CN219639117U

CN219639117U - Wind wheel with reinforced blade outer edge

Info

Publication number: CN219639117U
Application number: CN202320195092.8U
Authority: CN
Inventors: 高文铭; 柴水华; 洪银川; 韩小红; 符文科
Original assignee: Ningbo Langdi Impeller Machinery Co Ltd
Current assignee: Ningbo Langdi Impeller Machinery Co Ltd
Priority date: 2023-01-19
Filing date: 2023-01-19
Publication date: 2023-09-05
Anticipated expiration: 2033-01-19

Abstract

The utility model relates to the field of cross-flow fan blades, in particular to a wind wheel with reinforced outer edges of the blades. A wind wheel with reinforced outer edges of blades comprises a wheel disc and a plurality of blades circumferentially arranged on the upper disc surface of the wheel disc; an air port is formed between two adjacent blades; the method is characterized in that: the leeward surface of the outer edge of the blade is provided with a bulge, and the outer side wall of the bulge is constructed into an arc surface or an inclined surface extending against the rotation direction of the wind wheel. The wind wheel is provided with the reinforcing protrusions at the outer edges of the wind wheel blades, so that the wind pressure resistance of the outer edges of the blades is improved; and the positions and the shapes of the bulges are reasonably arranged so as to reduce the influence of the bulges on wind resistance and air flow.

Description

Wind wheel with reinforced blade outer edge

Technical Field

The utility model relates to the field of cross-flow fan blades, in particular to a wind wheel with reinforced outer edges of the blades.

Background

The cross-flow fan blade is an air conditioner fan blade and comprises a motor wind wheel, a steel shaft disc and a plurality of wind wheels which are arranged between the motor shaft disc and the steel shaft disc in a connecting way. The wind wheel is mainly a motor wind wheel and a wind turbine in cross-flow blades, and the motor wind wheel and the wind turbine comprise a wheel disc and a plurality of blades circumferentially arranged on the upper disc surface of the wheel disc; specific reference may be made to a cross-flow fan blade middle section described by the publication number "CN201486933U", and a cross-flow wind wheel end cover and a cross-flow wind wheel thereof described by the publication number "CN 213574805U".

In the wind wheel in the prior art, the outer edges of the blades are generally narrower and thinner, so that wind resistance generated in the rotating process is reduced. But the strength of the outer edge of the narrow and thin blade is weaker, and the outer edge of the blade is the place with the highest rotating speed in the rotating process of the cross-flow fan blade. Therefore, the outer edges of the blades in the existing wind wheel are easy to damage, and the wind wheel needs to be reinforced.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a wind wheel with reinforced blade outer edges, wherein the wind wheel is provided with reinforced bulges at the outer edges of the blades of the wind wheel, so that the wind pressure resistance of the outer edges of the blades is increased; and the positions and the shapes of the bulges are reasonably arranged so as to reduce the influence of the bulges on wind resistance and air flow.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a wind wheel with reinforced outer edges of blades comprises a wheel disc and a plurality of blades circumferentially arranged on the upper disc surface of the wheel disc; an air port is formed between two adjacent blades; the method is characterized in that: the leeward surface of the outer edge of the blade is provided with a bulge, and the outer side wall of the bulge is constructed into an arc surface or an inclined surface extending against the rotation direction of the wind wheel.

The utility model adopts the technical scheme, and the technical scheme relates to a wind wheel with reinforced outer edges of blades, which can be used as a motor wind wheel or a wind turbine in a through-flow fan blade. Compared with the prior art, the advantage of this scheme lies in: the lee surface of the outer edge of the blade is provided with a bulge, and the bulge is mainly used for enhancing the wind pressure resistance intensity of the outer edge of the blade, so that the bulge is required to be arranged on the outer edge, and the bulge is required to be arranged on the lee surface in order to reduce wind resistance as much as possible.

On the basis, the scheme further requires that the outer side wall of the bulge is constructed into an arc-shaped surface or an inclined surface extending against the rotation direction of the wind wheel, so that the difference between the circumferential running path of the outer edge of the blade and the running path of the blade when the bulge is not arranged in the rotation process of the wind wheel is small, and the influence of the bulge on wind resistance and air flow is reduced.

Based on the scheme, the wind wheel is provided with the reinforcing protrusions at the outer edge of the wind wheel blade, so that the wind pressure resistance of the outer edge of the blade is improved; and the positions and the shapes of the bulges are reasonably arranged so as to reduce the influence of the bulges on wind resistance and air flow.

In a specific embodiment, the blade is an arc body with a thick middle and thin two ends, the arc radius of the pressure surface of the blade is R2, the outer edge diameter of the wheel disc is D1, and the requirements are satisfied: 25% D1 is less than or equal to R2 is less than or equal to 35% D1. In this scheme, the arc radius of blade pressure face is rationally set up, makes between its and the rim plate external diameter satisfy above-mentioned ratio requirement, and amount of wind and wind pressure are most reasonable.

Preferably, the radius formed by the protrusions on the outer edge of the blade is R, and 50% of D1 is more than or equal to R and more than or equal to 48% of D1. In this solution, the circumference of the outer edge of the blade is required to be slightly smaller than the outer edge of the wheel disc.

Preferably, the convex peak of the bulge is in a circular arc shape, the root of the inner side wall of the convex peak is connected to the leeward surface of the blade, the length of the inner side wall of the convex peak is L, and L is more than or equal to 1.5 percent R2. In the rotating process of the wind wheel, the air flow flows into the convex peak after passing through the convex outer side wall, and in the scheme, the convex peak of the convex is arc-shaped, so that the smooth transition of the air flow arc can be guided. Further, the size of the protrusions is reasonably set so that the length L of the inner side wall of the protrusions is more than or equal to 1.5% R2, and enough length is provided for guiding airflow to flow.

Preferably, the projections are configured as triangles or trapezoids.

In one embodiment, the wheel disc is an annular wheel disc, and a welding groove in butt joint with the end part of the blade is formed in the lower disc surface of the wheel disc. In the scheme, the wind wheel is used as a wind wheel of the cross-flow fan blade, and a plurality of middle wind wheels are required to be fixedly connected, so that a welding groove is required to be arranged on the lower disc surface of the wheel disc and used for welding the end parts of the wind wheel blades adjacent to the welding groove.

In another embodiment, the wheel disc is a round wheel disc, and a shaft sleeve for inserting a motor shaft is arranged at the shaft center of the wheel disc. The wind wheel in the scheme is used as a motor wind wheel of the through-flow fan blade, and the shaft sleeve at the center of the wind wheel is used for being inserted into a motor shaft of the driving motor.

Drawings

Fig. 1 is a schematic side view of a wind turbine.

Fig. 2 is a schematic view of a blade-side structure of a wind turbine.

Fig. 3 is an enlarged schematic view of the blade.

Fig. 4 is a partial enlarged view of fig. 3.

Fig. 5 is a schematic structural view of a motor rotor.

Description of the embodiments

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 and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-4, the present embodiment relates to a wind wheel with reinforced outer edges of blades, which comprises a wheel disc 1 and a plurality of blades 2 circumferentially arranged on the upper disc surface of the wheel disc 1, wherein a wind gap 3 is formed between two adjacent blades 2. The leeward side 2a of the blade outer edge 20 is provided with a protrusion 21, and the protrusion 21 is configured in a triangle or trapezoid shape. The outer side wall 211 of the projection 21 is constructed as an arcuate surface or inclined surface extending against the direction of rotation of the wind turbine. The wind wheel can be used as a motor wind wheel or a wind wheel in a cross-flow fan blade. Compared with the prior art, the advantage of this scheme lies in: the lee surface 2a of the blade outer edge 20 is provided with the protrusions 21, and the protrusions 21 are required to be provided on the outer edge in order to enhance the wind pressure resistance of the blade outer edge 20, and the protrusions 21 are required to be provided on the lee surface 2a in order to reduce wind resistance as much as possible.

On the basis, the scheme further requires that the outer side wall 211 of the protrusion 21 is constructed into an arc-shaped surface or an inclined surface extending against the rotation direction of the wind wheel, so that the difference between the circumferential running path of the outer edge 20 of the blade and the running path when the protrusion 21 is not arranged is smaller in the rotation process of the wind wheel, and the influence of the protrusion 21 on wind resistance and air flow is reduced.

Based on the scheme, the wind wheel is provided with the reinforcing protrusions 21 at the outer edge 20 of the wind wheel blade, so that the wind pressure resistance of the outer edge 20 of the blade is increased. And the positions and the shapes of the bulges 21 are reasonably arranged so as to reduce the influence of the bulges 21 on wind resistance and air flow.

In a specific embodiment, the blade 2 is an arc body with a thick middle and thin two ends, the arc radius of the pressure surface 2b of the blade is R2, the outer edge diameter of the wheel disc 1 is D1, and the following conditions are satisfied: 25% D1 is less than or equal to R2 is less than or equal to 35% D1. In the scheme, the arc radius of the blade pressure surface 2b is reasonably set, so that the ratio requirement between the blade pressure surface and the outer diameter of the wheel disc 1 is met, and the air quantity and the air pressure are most reasonable. The radius formed by the bulge 21 on the outer edge 20 of the blade is R, and 50% D1 is more than or equal to R and more than or equal to 48% D1. In this solution, the blade outer edge 20 is required to be located at a circumference slightly smaller than the outer edge of the disk 1.

Further, the convex peak 212 of the protrusion 21 is in a circular arc shape, the root of the inner side wall 213 of the convex peak is connected to the leeward surface 2a of the blade 2, the length of the inner side wall 213 of the convex peak is L, and L is more than or equal to 1.5% R2. In the process of wind wheel rotation, the air flow flows into the convex peak 212 after passing through the outer side wall 211 of the convex 21, and in the scheme, the convex peak 212 of the convex 21 is in an arc shape, so that the air flow can be guided to be in smooth transition in the arc shape. Further, the protrusions 21 are sized so that the length L of the inner side walls 213 is greater than or equal to 1.5% R2, providing sufficient length for guiding the airflow.

In one embodiment shown in fig. 1 and 2, the wheel disc 1 is an annular wheel disc, and a welding groove which is in butt joint with the end of the blade 2 is formed on the lower disc surface of the wheel disc 1. In the scheme, the wind wheel is used as a wind wheel of the cross-flow fan blade, and a plurality of middle wind wheels are required to be fixedly connected, so that a welding groove is required to be arranged on the lower disc surface of the wheel disc 1 and used for welding the end part of the wind wheel blade 2 adjacent to the welding groove.

In another embodiment shown in fig. 5, the wheel 1 is a round wheel, and a shaft sleeve 13 for plugging a motor shaft is arranged at the shaft center of the wheel 1. The wind wheel in the scheme is used as a motor wind wheel of the through-flow fan blade, and the shaft sleeve 13 at the center of the wind wheel is used for being inserted into a motor shaft of the driving motor.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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 present 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.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims

1. A wind wheel with reinforced outer edges of blades comprises a wheel disc (1) and a plurality of blades (2) circumferentially arranged on the upper disc surface of the wheel disc (1); an air port (3) is formed between two adjacent blades (2); the method is characterized in that: the leeward side (2 a) of the blade outer edge (20) is provided with a bulge (21), and the outer side wall (211) of the bulge (21) is constructed into an arc-shaped surface or an inclined surface extending against the rotation direction of the wind turbine.

2. A wind wheel with reinforced outer edges of blades as claimed in claim 1, wherein: the blade (2) is an arc body with thick middle and thin two ends, the arc radius of the blade pressure surface (2 b) is R2, the outer edge diameter of the wheel disc (1) is D1, and the requirements are satisfied: 25% D1 is less than or equal to R2 is less than or equal to 35% D1.

3. A wind wheel with reinforced outer edges of blades as claimed in claim 2, wherein: the radius formed by the bulge (21) at the outer edge (20) of the blade is R, and 50% of D1 is more than or equal to R and more than or equal to 48% of D1.

4. A wind wheel with reinforced outer edges of blades as claimed in claim 2, wherein: the convex peak (212) of the bulge (21) is arc-shaped, the root of the inner side wall (213) of the convex peak is connected to the leeward surface (2 a) of the blade (2), and the length of the inner side wall (213) of the convex peak is L, wherein L is more than or equal to 1.5% R2.

5. A wind wheel with reinforced outer edges of blades as claimed in claim 1, wherein: the projections (21) are configured as triangles or trapezoids.

6. A wind turbine with reinforced outer edges of blades according to any of claims 1-5, wherein: the wheel disc (1) is an annular wheel disc, and a welding groove which is in butt joint with the end part of the blade (2) is formed in the lower disc surface of the wheel disc (1).

7. A wind turbine with reinforced outer edges of blades according to any of claims 1-5, wherein: the wheel disc (1) is a round wheel disc, and a shaft sleeve (13) for being inserted into a motor shaft is arranged at the axis of the wheel disc (1).