JP3238350U - Blades for wind power generation and wind power generation equipment with elliptical cross-section wing roots - Google Patents

Abstract

A wind power generation blade and a wind power generator having an elliptical cross-section root are provided to improve the structural performance deficiencies of conventional blades having circular cross-section roots. A blade for wind power generation (1) comprises a blade root segment (101), a transition segment (102) and a maximum chord length segment (103) connected in sequence, the blade root segment being fixedly connected to one side end face of the transition segment, the The maximum chord length segment is fixedly connected to one side end face of the transition segment away from the blade root segment, the transition segment gradually increases in cross-sectional area in a direction away from the blade root segment, and the maximum chord length segment is the blade root segment. A cross-sectional area gradually decreases in the direction away from the root segment and a root conversion disk is provided at one end of the root segment remote from the transition segment. By changing the shape of the root segment to elliptical, the swinging load of the wind turbine blade is reduced. [Selection drawing] Fig. 1

Description

This practical proposal relates to the technical field of wind power generation, and specifically to a blade for wind power generation having an elliptical cross-section wing root.

The blade for wind power generation is one of the core parts in the entire wind power generation unit. Generally, the blade for wind power generation is mainly composed of a composite material such as glass fiber and carbon fiber, and the root of the blade is the entire blade. It is responsible for the most important structural performance in the field, its geometric outline and laying method are complicated and diverse, and many parameters pose important challenges for model adjustment and optimization, and are mainly used in the design of wing root segments. Two modules of structure and aerodynamics are involved in the process, and the iterative optimization rate is slow. Blades with conventional circular cross-section wing roots, which increase with increasing size, have the drawback of lacking structural performance in the swing direction.

Therefore, the technical problem to be solved by this practical proposal is to solve the defect that the structural performance of the conventional blade having a circular cross-section wing root is insufficient, and to obtain a blade for wind power generation having an elliptical cross-section wing root. To provide.

In order to solve the above problems, this utility model
Equipped with blades for wind power generation with sequentially connected wing root segments, transition segments, maximum string length segments,
The wing root segment is fixedly connected to one side end face of the transition segment, and the maximum chord length segment is fixedly connected to one side end face of the transition segment away from the wing root segment.
The cross-sectional area of the transition segment gradually increases in the direction away from the wing root segment, and the cross-sectional area of the maximum chord length segment gradually decreases in the direction away from the wing root segment.
Provided is a blade for wind power generation having an elliptical cross-section wing root provided with a wing root conversion disk at one end of the wing root segment away from the transition segment.

Preferably, the wing root conversion disk comprises an elliptical end face, the elliptical end face being screwed into a side of the wing root segment away from the transition segment via a bolt for the elliptical end face, from the wing root segment of the elliptical end face. A circular end face is fixedly connected to a distant one-sided end face, the circular end face is fixedly connected to the side wall of the elliptical end face via a circular end face bolt, and a wing root through hole is provided at the center position of the circular end face.

Preferably, the elliptical end face is provided with a plurality of sets of first screw through holes that engage with the elliptical end face bolt, and the circular end face is provided with a plurality of sets of second screw through holes that engage with the circular end face bolt. It will be provided.

Preferably, a hub is provided on the circular end face away from the elliptical end face, and the internal lead of the wind power generation blade penetrates the wing root through hole.

Preferably, the wing root segment, the transition segment, and the maximum chord length segment are all configured by fixing a plurality of segments.

Preferably, the length of the wing root segment is generally 1.5 m to 2 m.

Preferably, the length of the wing root segment and the transition segment is 0.2 to 0.25 times the length of the blade root for wind power generation.

A wind power generation device preferably includes a blade for wind power generation having an elliptical cross-section wing root according to any one of claims 1 to 7.

This utility model has the following advantages.
1. By using an elliptical cross-section wing root, the outer shape of the transition segment of the blade for wind power generation can be adjusted more flexibly, and the continuity and structural performance of the outer shape of the blade base can be improved, and the weight of the blade can be reduced. , The frequency of the blade can be adjusted, and the solution of the elliptical cross-section wing root can adjust the pitch center of the blade and reduce the moment required for its pitch operation.
2. Compared to the circular cross-section wing root, the elliptical cross-section wing root has high wind energy utilization efficiency and is advantageous for improving the amount of power generation.
3. To make an elliptical cross-section wing root, it is only necessary to change the shape of the mold, and since the mold is cut by a milling cutter, it may be theoretically processed into a curved surface of any shape. Therefore, the processing of the elliptical cross-section wing root is simple and easy.

In order to more clearly explain a specific embodiment of the present practical novel or a technical solution in the prior art, the drawings used for describing the specific embodiment or the prior art will be briefly described below. Obviously, the drawings described below are some embodiments of the present utility novel, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

It is a structural schematic diagram of this utility model. It is a front view of the wing root conversion disk structure of this utility model. It is a side view of the wing root conversion disk structure of this utility model. It is a structural schematic diagram of the transition segment of this utility model.

Hereinafter, the examples in which the technical solution of the utility model is clearly and completely explained and clearly explained with reference to the drawings are only a part of the examples of the utility model, and all the embodiments are given. is not. Based on the examples in this utility model, all other examples obtained by those skilled in the art without the need for creative labor belong to the scope of the present utility model.

In the explanation of this practical proposal, the directions indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc. Alternatively, the positional relationship is based on the illustrated orientation or positional relationship, and is used only for facilitating the explanation of the present practical novel and simplifying the explanation, and such a device or component always has a specific orientation. It does not instruct or suggest that it be configured or operated in any particular orientation, and should not be understood as limiting this Practical New Plan. It should also be understood that the terms "first", "second" and "third" are used for explanatory purposes only and do not imply or imply relative importance.

In the description of this utility model of the present application, the terms "attachment", "connection", and "connection" should be understood in a broad sense unless specifically specified or restricted, and for example, fixed connection and attachment / detachment. It may be a possible connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or an internal communication between the two elements. .. Those skilled in the art can understand the specific meanings of the above terms in this utility model depending on the specific situation.

In addition, the technical features of the various embodiments of the Utility Model described below can be combined with each other as long as they do not conflict.

In one embodiment, with reference to FIGS. 1 to 4, the present utility novel provides a blade for wind power generation having an elliptical cross-section wing root, wherein the blade for wind power generation has a wing root segment 101, a transition segment, which are sequentially connected. 102, a blade for wind power generation with a maximum chord length segment 103, the wing root segment 101 is fixedly connected to one side end face of the transition segment 102, and the maximum chord is attached to one side end face of the transition segment 102 away from the wing root segment 101. The long segment 103 is fixedly connected and
The cross-sectional area of the transition segment 102 gradually increases in the direction away from the wing root segment 101, and the cross-sectional area of the maximum chord length segment 103 gradually decreases in the direction away from the wing root segment 101.
The wing root conversion disk 2 is provided at one end of the wing root segment 101 away from the transition segment 102.

Specifically, the wing root conversion disk 2 includes an elliptical end face 201, and the elliptical end face 201 is screwed to the side away from the transition segment 102 of the wing root segment 101 via an elliptical end face bolt 202, and the wing of the elliptical end face 201. A circular end face 203 is fixedly connected to one side end face away from the root segment 101, and the circular end face 203 is fixedly connected to the side wall of the elliptical end face 201 via a circular end face bolt 204, and a wing root through hole is fixedly connected to the center position of the circular end face 203. 205 is provided.

Specifically, the elliptical end face 201 is provided with a plurality of sets of first screw through holes that engage with the elliptical end face bolt 202, and the circular end face 203 is provided with a plurality of sets of second screw through holes that engage with the circular end face bolt 204. A hole is provided.

Specifically, a hub is provided on the side of the circular end surface 203 away from the elliptical end surface 201, and the internal lead of the wind power generation blade 1 penetrates the wing root through hole 205.

Specifically, the wing root segment 101, the transition segment 102, and the maximum chord length segment 103 are all configured by fixing a plurality of segments.

Specifically, the length of the wing root segment 101 is generally 1.5 m to 2 m.

Specifically, the length of the blade root segment 101 and the transition segment 102 is 0.2 to 0.25 times the length of the blade root 1 for wind power generation.

Specifically, the wind power generation device includes a blade for wind power generation having an elliptical cross-section wing root according to any one of claims 1 to 7.

The operating principle of the above technical solution is as follows. In the present application, the shape of the blade root segment 101 of the blade 1 for wind power generation is changed to an elliptical cross section from the blade root segment 101 to the maximum chord length segment 103. The wing root conversion disk 2 at one end of the wing root so that the outer shape of the transition segment 102 of the Is attached.

Since the blade mold is gradually milled by a milling machine based on the 3D outer shape of the blade, either the manufacturing of the blade mold of the elliptical cross-section blade root segment 101 or the laying of the blade root segment 1 is performed. There is no need to make individual adjustments, and the processing of the elliptical cross-section wing root segment 101 is the same as the process of a blade having a conventional circular cross-section wing root, and thus can be easily realized.

The length of the elliptical cross-section wing root segment 101 should be greater than the length of the wing root embedded bolt sleeve (typically 1.5-2 m) and the transition segment 102 (oval and maximum chord length segment). (Between the airfoil at 103) transitions with a curved surface.

The size of the elliptical cross section of the root segment 101 is determined according to the initial design parameters of the blade and the size of the airfoil at the maximum chord length segment 103, thereby ensuring the smoothness of the curved surface of the transition segment 102. The possible range of the major axis of the ellipse of the wing root segment 101 is from 1.2 times the diameter of the conventional wing root circle to 0.8 times the chord length of the airfoil in the maximum chord length segment 103.

At one end of the elliptical cross-section wing root segment 101 away from the transition segment 102, a wing root conversion disk 2 for fitting the elliptical cross-section wing root segment 101 and the circular end face of the hub of the wind power generator is attached, and the wing root conversion disk 2 is attached. The elliptical end face 201 of the above is connected to the wing root segment 101 by using the elliptical end face bolt 202, whereby the blade 1 for wind power generation is fixed to the elliptical end face 201, and the circular end face bolt 204 is circular on the circular end face 203. Pre-manufactured in the circumferential direction, the circular end face 203 is exactly the same as the shape of the wing root and the position of the bolt holes of the conventional blade, so that the engagement of the wind generator with the hub of the wind generator is realized. When the wing root conversion disk 2 is connected to the hub, a lead or the like inside the blade penetrates the wing root through hole 205.

In the design of the wing root conversion disc 2, it is necessary to satisfy the dimensional conformity and guarantee the structural strength of itself. In the wing root conversion disc 2, a plurality of sets of bolts are assembled (bolts are evenly or not). Since it may be evenly distributed), the stress concentration due to drilling at multiple positions must be dealt with carefully, for example, increasing the number of layers of fiber cloth in the swing direction and increasing the number of layers of the covering layer. It can be adjusted by increasing the thickness, and since the blade root conversion disk 2 can share a part of the load received by the hub, the design cost of the hub structure and the amount of materials used are appropriately reduced. can do.

Obviously, the above embodiments are merely examples for the sake of clarity and are not intended to limit embodiments. Those skilled in the art may make various other forms of change or modification based on the above description. Here, it is not necessary to cover all the embodiments, and it is impossible to cover all the embodiments. Obvious changes or variations derived from this also belong to the claims of the present invention.

1. Wind power blade 101, wing root segment 102, transition segment 103, maximum chord length segment 2, wing root conversion disk 201, elliptical end face 202, elliptical end face bolt 203, circular end face 204, circular end face bolt 205, wing Root penetration hole

Claims (8)

A blade for wind power generation with an elliptical cross-section wing root,
A blade for wind power generation (1) having a sequentially connected wing root segment (101), transition segment (102), and maximum chord length segment (103).
The wing root segment (101) is fixedly connected to one side end surface of the transition segment (102), and the maximum chord length segment (103) is connected to one side end surface of the transition segment (102) away from the wing root segment (101). ) Is fixedly connected,
The cross-sectional area of the transition segment (102) gradually increases in the direction away from the wing root segment (101), and the cross-sectional area of the maximum chord length segment (103) gradually increases in the direction away from the wing root segment (101). Decreased to
A blade for wind power generation, characterized in that a blade root conversion disk (2) is provided at one end of the blade root segment (101) away from the transition segment (102). The wing root conversion disk (2) includes an elliptical end face (201).
The elliptical end face (201) is screwed to the side of the wing root segment (101) away from the transition segment (102) via the elliptical end face bolt (202), and the wing root segment of the elliptical end face (201). A circular end face (203) is fixedly connected to one side end face away from (101), and the circular end face (203) is fixedly connected to the side wall of the elliptical end face (201) via a circular end face bolt (204). The blade for wind power generation having an elliptical cross-section blade root according to claim 1, wherein a blade root through hole (205) is provided at a central position of a circular end surface (203). The elliptical end face (201) is provided with a plurality of sets of first screw through holes that engage with the elliptical end face bolt (202), and the circular end face (203) engages with the circular end face bolt (204). The blade for wind power generation having an elliptical cross-section wing root according to claim 2, wherein a plurality of sets of second screw through holes are provided. A hub is provided on the side of the circular end face (203) away from the elliptical end face (201), and the internal lead of the wind power generation blade (1) penetrates the wing root through hole (205). The blade for wind power generation having the elliptical cross-section wing root according to claim 2. The ellipse according to claim 1, wherein the wing root segment (101), the transition segment (102), and the maximum chord length segment (103) are all configured by fixedly connecting a plurality of segments. A blade for wind power generation with a cross-section wing root. The blade for wind power generation having an elliptical cross-section wing root according to claim 1, wherein the length of the wing root segment (101) is generally 1.5 m to 2 m. The first aspect of claim 1, wherein the length of the blade root segment (101) and the transition segment (102) is 0.2 to 0.25 times the length of the blade for wind power generation (1). Blade for wind power generation with an elliptical cross-section wing root. A wind power generation device including a blade for wind power generation having an elliptical cross-section wing root according to any one of claims 1 to 7.

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