Fan blade section structure

Abstract

The utility model discloses a fan blade section structure, and relates to the field of fan blade structures. The fish-body-shaped fan blade comprises a hollow fan blade body with a fish-body-shaped section, and a rear tail end which is positioned at the rear tail part of the fan blade body and has a long swallow-tail-shaped section, a first closed reinforcing rib and a second closed reinforcing rib are vertically arranged at the front position and the rear position in the fan blade body respectively, and a mounting cavity for mounting an inserting piece is formed between the first closed reinforcing rib and the second closed reinforcing rib; and two groups of raised reinforcing ribs are respectively arranged at the upper and lower positions of the mounting cavity in the fan blade body. According to the fan blade section, the limiting stability and the light weight effect are improved, through the design of the tail and the rear tail end with the section in the long dovetail shape, a larger windward side is brought, and therefore the more efficient fanning effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of fan blade structures, and particularly relates to a fan blade cross-sectional structure. Background Art

[0002] Industrial fans are fans used in industrial scenes, which can achieve a high coverage and comfortable cooling effect for scenes such as tall factories. Among them, industrial ceiling fans are larger in size, and the length of the fan blades can even reach 3-4 meters. In terms of manufacturing process feasibility and rationality, the fan blades are generally extruded from aluminum alloy, and the hollow fan blades are directly inserted into the fan blade connector and fixed by bolt assemblies, and then the fan blade connector is fixed to the turntable on the ceiling fan head by bolts.

[0003] For industrial ceiling fans, it is necessary to achieve as light a weight as possible, a wider windward surface of the fan blades, and a higher structural strength; therefore, this technical solution proposes a fan blade cross-sectional structure. Utility Model Content

[0004] The utility model provides a fan blade cross-section structure, which consists of a fan blade body and a rear end with a long dovetail shape in cross-section, and the fan blade body is divided into an installation cavity in the middle for installing a plug-in and weight-reducing cavities on both sides by a first closed reinforcement rib and a second closed reinforcement rib, and two groups of raised reinforcement ribs arranged up and down in the installation cavity realize stable limiting and installation of the plug-in, thereby improving the stability of the limiting and the effect of lightweight, and the design of the rear end with a tail and a long dovetail shape in cross-section brings a larger windward surface, thereby obtaining a more efficient fanning effect; in summary, the problems in the background technology are solved.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a fan blade cross-section structure, comprising a fan blade body which is hollow inside and has a fish body shape in cross section, and a rear end which is located at the rear end of the fan blade body and has a long dovetail shape in cross section;

[0007] The front and rear positions of the fan blade body are respectively vertically provided with a first closed reinforcement rib and a second closed reinforcement rib, and an installation cavity for installing a plug-in is formed between the first closed reinforcement rib and the second closed reinforcement rib; two groups of raised reinforcement ribs are respectively arranged at the upper and lower positions of the installation cavity in the fan blade body.

[0008] Furthermore, when the fan blade as a whole is moving, a line connecting the center position of the fillet of the head of the fan blade body and the center of the fillet of the tail tip at the rear end forms an angle of 16° with the horizontal line.

[0009] Furthermore, a weight-reducing cavity is formed between the first closed reinforcement rib and one side of the blade body, and between the second closed reinforcement rib and the other side of the blade body.

[0010] Furthermore, the upper portion of the rear tail end and the fan blade body are connected in a convex and smooth manner; the lower portion of the rear tail end and the fan blade body are connected in a concave and smooth manner; the rear tail end and the fan blade body form an integral fan blade structure.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) The fan blade section is composed of a fan blade body and a rear end with a long dovetail shape in cross section, and the fan blade body is divided into a mounting cavity in the middle for installing the plug-in and weight-reducing cavities on both sides by the first closed reinforcing rib and the second closed reinforcing rib. The two groups of raised reinforcing ribs arranged up and down in the mounting cavity realize stable positioning and installation of the plug-in, thereby improving the stability of positioning and the effect of weight reduction;

[0013] (2) The design of the rear end with a long dovetail-shaped cross-section provides a larger windward surface, thereby achieving a more efficient fanning effect.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a fan blade cross-section structure of the utility model;

[0017] Figure 2 A schematic diagram of the angle between a line connecting the center position of the rounded corner of the head of the fan blade body and the center of the rounded corner of the tail tip at the rear end and a horizontal line of the utility model;

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1-blade body, 101-second closed reinforcement rib, 102-first closed reinforcement rib, 103-raised reinforcement rib, 104-installation cavity, 2-rear end. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it is necessary to understand that the terms "tail", "cross-section", "upper and lower positions", "inner", "convex", "concave" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] There are many existing fan blades and aircraft wings, and there are many aircraft wing airfoils worth learning from. This fan blade combines the advantages of aircraft wings and the low-speed characteristics of civil fans, and also fully considers the processing and manufacturing technology and installability to obtain the cross-section of this fan blade.

[0023] See also Figure 1 As shown, a fan blade cross-sectional structure of the utility model comprises a fan blade body 1 which is hollow inside and has a fish body shape in cross section, and a rear end 2 which is located at the rear end of the fan blade body 1 and has a long dovetail shape in cross section; the fish body shape is the shape of a grass carp;

[0024] A first closed reinforcing rib 102 and a second closed reinforcing rib 101 are vertically arranged at the front and rear positions inside the fan blade body 1, and an installation cavity 104 for installing a plug-in is formed between the first closed reinforcing rib 102 and the second closed reinforcing rib 101; two groups of raised reinforcing ribs 103 are respectively arranged at the upper and lower positions of the installation cavity 104 inside the fan blade body 1.

[0025] like Figure 2 As shown, the fan blade head is convex in the shape of a water drop, the tail wing has an inward concave shape, and the fan blade tail is long. When the fan blade is running, the line connecting the center of the rounded corner of the fan blade head and the center of the rounded corner of the fan blade tail tip is 16° to the horizontal line.

[0026] A weight-reducing cavity is formed between the first closed reinforcing rib 102 and one side of the blade body 1 , and between the second closed reinforcing rib 101 and the other side of the blade body 1 .

[0027] Among them, the upper part of the rear tail end 2 and the fan blade body 1 are connected in a raised and smooth manner; the lower part of the rear tail end 2 and the fan blade body 1 are connected in a concave and smooth manner; the rear tail end 2 and the fan blade body 1 constitute an integral fan blade structure; this upper part is connected in a raised and smooth manner, and the lower part is connected in a concave and smooth manner, which is more conducive to the fanning effect of the fan blade; the aerodynamic performance is better, and as a fan blade, the efficiency of generating wind is higher.

[0028] The fan blade cross-sectional structure in this specific embodiment has the following characteristics:

[0029] (1) The outer contour has only one concave area, and the rest are convex;

[0030] (2) There are two closed stiffeners and four raised stiffeners in the cross section;

[0031] (3) When the fan blades are running, the line connecting the center of the rounded corner of the fan blade head and the center of the rounded corner of the fan blade tail is 16 degrees to the horizontal line;

[0032] (4) The length of the horizontal projection line of the cross-sectional curve is about 192 mm;

[0033] (5) The length of the projection line of the cross-section curve in the vertical direction is about 66 mm;

[0034] (6) The largest cavity in the middle is the fan blade clamping area;

[0035] (7) The tail of the fan blade has a long tail area similar to a swallow's tail.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fan blade cross-sectional structure, characterized in that: It comprises a fan blade body (1) which is hollow inside and has a cross section in the shape of a fish body, and a rear end (2) which is located at the rear end of the fan blade body (1) and has a cross section in the shape of a long dovetail; A first closed reinforcing rib (102) and a second closed reinforcing rib (101) are respectively arranged vertically at the front and rear positions in the fan blade body (1), and an installation cavity (104) for installing a plug-in is formed between the first closed reinforcing rib (102) and the second closed reinforcing rib (101); and two groups of raised reinforcing ribs (103) are respectively arranged at the upper and lower positions of the installation cavity (104) in the fan blade body (1).

2. A fan blade cross-sectional structure according to claim 1, characterized in that: When the fan blade as a whole is moving, a line connecting the center position of the rounded corner of the head of the fan blade body (1) and the center position of the rounded corner of the tail tip of the rear end (2) forms an angle of 16° with the horizontal line.

3. A fan blade cross-sectional structure according to claim 1, characterized in that: A weight-reducing cavity is formed between the first closed reinforcing rib (102) and one side of the blade body (1), and between the second closed reinforcing rib (101) and the other side of the blade body (1).

4. A fan blade cross-sectional structure according to claim 1, characterized in that: The upper portion of the rear end (2) and the fan blade body (1) are connected in a convex and smooth manner; the lower portion of the rear end (2) and the fan blade body (1) are connected in a concave and smooth manner; and the rear end (2) and the fan blade body (1) form an integral fan blade structure.

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