Steel plate blade reinforcing structure for fan

Abstract

The utility model provides a steel plate blade reinforcing structure for a fan, and belongs to the technical field of fan equipment. The fan blade solves the problem that fan performance loss is large when the fan blade is used in the prior art and comprises a blade body, the blade body and a blade root, the whole blade body is in an arc-shaped irregular rectangle-like shape, narrow long-strip protrusions are formed at the position, close to the blade body, of the blade body, and the narrow long-strip protrusions are distributed in an arc shape as a whole. The surface of the narrow strip protrusion is in a triangular protrusion shape with a fillet, inverted-trapezoid-shaped reinforcing ribs are formed on the blade body and the blade root, the reinforcing ribs extend to the blade body from the blade root and finally return to the blade root to form an inverted-trapezoid-shaped surrounding structure, a reinforcing groove is formed in the end of the blade root, the center of the reinforcing groove is of an inwards-concave structure, and the two ends of the reinforcing groove are of outwards-protruding structures. The two ends of the reinforcing groove are connected with the ends of the reinforcing ribs. The utility model has the advantages that the strength and the rigidity are stronger, and the performance loss of the fan can be reduced when the fan is used.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan equipment and relates to a reinforcing structure for a steel plate blade of a fan. Background Art

[0002] When the impeller rotating at high speed is subjected to a large centrifugal force and gas pressure, if the design is unreasonable, the impeller will break or deform beyond the allowable range. In the prior art, the material is thickened or reinforcing ribs are added, but this method often still fails to achieve an ideal effect, or the strength is sufficient but the hindrance to the air flow is too strong, resulting in a large loss of the performance of the fan.

[0003] Chinese Patent with publication number CN202971323U discloses a fan blade. A plurality of inner cavities are arranged inside the blade, the inner wall of the inner cavity is concave-convex, the inner wall of the inner cavity of the blade is concave-convex, the saw teeth are equivalent to reinforcing ribs, a clamping groove is arranged at the leading edge of the blade, and an external connecting blade with a convex block matching the clamping groove is spliced at the clamping groove.

[0004] The fan blade provided by this patent lacks a structural setting for preventing air flow obstruction, which will cause a large loss of fan performance during use. Content of the Utility Model

[0005] The purpose of the utility model is to provide a reinforcing structure for a steel plate blade of a fan aiming at the above problems existing in the prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions: A reinforcing structure for a steel plate blade of a fan, including a blade, the blade includes a blade tip, a blade body and a blade root, the blade is integrally in an arc-shaped irregular rectangular shape, a narrow long strip protrusion is formed at the blade tip near the blade body, the narrow long strip protrusion is integrally distributed in an arc shape, the surface of the narrow long strip protrusion is in the shape of a triangular protrusion with rounded corners, inverted trapezoidal reinforcing ribs are formed on the blade body and the blade root, the reinforcing ribs extend from the blade root to the blade body and then return to the blade root to form an inverted trapezoidal surrounding structure, a reinforcing groove is formed at the end of the blade root, the center of the reinforcing groove is in a concave structure and the two ends of the reinforcing groove are in a protruding structure, and the two ends of the reinforcing groove are connected to the ends of the reinforcing ribs.

[0007] In the above-mentioned reinforcing structure for a steel plate blade of a fan, arrow-shaped protrusions are formed on the blade.

[0008] In the above-mentioned reinforcing structure for a steel plate blade of a fan, the horizontal height of the reinforcing rib is greater than the overall horizontal height of the blade.

[0009] In the above-mentioned reinforcing structure for a steel plate blade of a fan, the horizontal height of the protruding structure is greater than the horizontal height of the reinforcing rib.

[0010] Compared with the prior art, a steel plate blade strengthening structure for a fan provided by the utility model has the following beneficial effects: through the structural settings of the reinforcing ribs and the reinforcing grooves at the blade root, the strength and rigidity of the blade are increased, and on the premise of meeting the strength and stiffness, the area hindering gas flow is minimized as much as possible. When the utility model is installed and used, the loss of the fan performance can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a schematic diagram of the structure of the utility model from another angle.

[0013] In the figure: 1, blade; 11, blade tip; 12, blade body; 13, blade root; 2, narrow long strip protrusion; 3, reinforcing rib; 4, reinforcing groove; 41, concave structure; 42, convex structure; 5, arrow protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following are specific embodiments of the utility model and in combination with the drawings, the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.

[0015] As Figures 1 to 2 shown, this embodiment includes a blade 1. The blade 1 is integrally formed in an arc-shaped irregular rectangular shape and the length of the blade 1 is greater than the width of the blade 1. The blade 1 is divided into a blade tip 11, a blade body 12 and a blade root 13 according to the length. A narrow long strip protrusion 2 is integrally formed at the position where the blade tip 11 is close to the blade body 12. The narrow long strip protrusion 2 is arranged in an arc shape along the wide side of the blade 1. The surface of the narrow long strip protrusion 2 is in the shape of a triangular protrusion with rounded corners. Large-area trapezoidal reinforcing ribs 3 are formed on the blade body 12 and the blade root 13. The reinforcing ribs 3 extend from the blade root 13 to the blade body 12 and finally return to the blade root 13 to form an inverted trapezoidal surrounding structure. The horizontal height of the reinforcing ribs 3 is greater than the overall horizontal height of the blade 1. The reinforcing ribs 3 increase the strength and rigidity of the blade 1 and meet the stress requirements of the material for making the blade 1. A reinforcing groove 4 is formed at the end of the blade root 13. The center of the reinforcing groove 4 is a concave structure 41 and both ends of the reinforcing groove 4 are convex structures 42. Both ends of the reinforcing groove 4 are connected to the ends of the reinforcing ribs 3. The horizontal height of the convex structure 42 is greater than the horizontal height of the reinforcing ribs 3. Through the structures of the reinforcing groove 4 and the narrow long strip protrusion 2, a high-low concave-convex structure is formed on both sides of the blade 1, reducing the area hindering gas flow. After this embodiment is installed, this embodiment can reduce the loss of the fan performance.

[0016] Further elaborating, as Figures 1 to 2As shown, an arrow-shaped protrusion 5 is formed on the blade 1 between the reinforcing rib 3 and the narrow strip-shaped protrusion 2. The arrow-shaped protrusion 5 indicates the rotation direction of the blade 1 after installation, preventing incorrect installation. Specifically, the arrow-shaped protrusion 5 extends towards the wide side of the blade 1.

[0017] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0018] Although various terms are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A steel plate blade reinforcement structure for a wind turbine, comprising a blade (1), wherein the blade (1) comprises a blade tip (11), a blade body (12) and a blade root (13), characterized in that: The blade (1) is in an irregular arc-shaped rectangular shape as a whole. A narrow long strip protrusion (2) is formed near the blade body (12) at the blade top (11). The narrow long strip protrusion (2) is distributed in an arc shape as a whole. The surface of the narrow long strip protrusion (2) is a triangular protrusion with rounded corners. Inverted trapezoidal reinforcing ribs (3) are formed on the blade body (12) and the blade root (13). The reinforcing ribs (3) extend from the blade root (13) to the blade body (12) and finally return to the blade root (13) to form an inverted trapezoidal surrounding structure. A reinforcing groove (4) is formed at the end of the blade root (13). The center of the reinforcing groove (4) is an inner concave structure (41) and the two ends of the reinforcing groove (4) are outer protruding structures (42). The two ends of the reinforcing groove (4) are connected to the ends of the reinforcing rib (3).

2. The steel plate blade reinforcement structure for a wind turbine according to claim 1, characterized in that: An arrow-shaped protrusion (5) is formed on the blade (1).

3. The steel plate blade reinforcement structure for a wind turbine according to claim 1, characterized in that: The horizontal height of the reinforcing rib (3) is greater than the horizontal height of the blade (1) as a whole.

4. The steel plate blade reinforcement structure for a wind turbine according to claim 1, characterized in that: The horizontal height of the protruding structure (42) is greater than the horizontal height of the reinforcing rib (3).

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