Wind power blade web structure

Abstract

The utility model discloses a wind power blade web plate structure which comprises a wind power blade and a web plate, U-shaped first clamping grooves are welded in the position, where the web plate is installed, of the wind power blade, the two sides of the web plate are clamped in the first clamping grooves, one end of the web plate is connected with one first clamping groove through a bolt, and the other end of the web plate is connected with the other first clamping groove in a bonding mode. An inner connecting plate is arranged between every two adjacent web plates, U-shaped second clamping grooves capable of clamping the inner connecting plates are welded to the web plates, the two sides of each inner connecting plate are clamped in the second clamping grooves in the web plates, and a plurality of downwind strips are spirally arranged on the outer side of the wind power blade. The first clamping grooves are welded in the wind power blade, then the web is clamped in the first clamping grooves, one end of the web is in bolted connection with one first clamping groove, and the other end of the web is in bonded connection with the other first clamping groove, so that the web can be installed on the wind power blade, and stress concentration caused by grooving in the wind power blade is avoided; and the strength of the wind power blade is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power, and in particular relates to a web structure of a wind power blade. Background Art

[0002] When manufacturing wind turbine blades, in order to improve their strength performance, a web is generally provided inside the blade to improve its deformation ability and strength. Regarding the connection structure of the web of a wind turbine blade, in the prior art, after searching, a utility model patent with Chinese patent publication number CN213648733U discloses a bonding structure of the web of a wind turbine blade, such as Figure 1 As shown, it mainly includes a wind turbine blade a and a web b. A groove c is arranged on one side of the wind turbine blade a, and one side of the web b is pasted in the groove of the wind turbine blade a.

[0003] In the prior art, the web connection structure of wind turbine blades similar to the above technical solution has room for improvement in actual implementation: the web is pasted on the wind turbine blade, which is not easy to disassemble and replace, and is prone to debonding and cracking, causing the web to fall off.

[0004] The wind turbine blades are provided with grooves along their length to hold the webs. Although the grooves can improve the limiting connection strength of the webs, the wind turbine blades are prone to generate large concentrated stresses at the grooves, which greatly reduces the strength of the wind turbine blades themselves and easily causes the wind turbine blades to break. Utility Model Content

[0005] In view of the deficiencies and defects in the prior art, the purpose of the present invention is to provide a wind turbine blade web structure, which solves the problem that the wind turbine blade web structure in the prior art is prone to breakage at the groove.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a wind turbine blade web structure, comprising a wind turbine blade and a web, a U-shaped first slot is welded on the wind turbine blade at the position where the web is installed, both sides of the web are clamped in the first slots, and one end of the web is connected to one of the first slots by bolts, and the other end is adhesively connected to the other first slot, an inner connecting plate is provided between adjacent webs, a U-shaped second slot for clamping the inner connecting plate is welded on the web, and both sides of the inner connecting plate are clamped in the second slots on the web, and a plurality of downwind strips are spirally arranged on the outer side of the wind turbine blade.

[0007] As a further improvement of the utility model, the wind turbine blade includes two half blades symmetrically bonded together.

[0008] As a further improvement of the utility model, the two half blades are connected at the outer sides of the butt joint by connecting sheets and bolts.

[0009] As a further improvement of the present invention, two sides of the inner connecting plate are connected to the second clamping groove bolts.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. By welding a first slot inside the wind turbine blade, and then clamping the web in the first slot, with one end of the web bolted to the first slot and the other end bonded to another first slot, the web can be installed on the wind turbine blade, and the stress concentration caused by grooving on the wind turbine blade can be avoided, thereby ensuring the strength of the wind turbine blade.

[0012] In addition, by arranging inner connecting plates between the webs, the webs are connected as a whole, thereby improving the overall connection strength.

[0013] By spirally arranging a plurality of downwind strips on the outer side of the wind turbine blade, the wind flow transmission is facilitated when the blade rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the prior art;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] In the figure: 1. wind turbine blade; 11. half blade; 2. web; 3. first slot; 4. bolt; 5. second slot; 6. downwind strip; 7. inner connecting plate; 8. connecting piece. DETAILED DESCRIPTION

[0018] The following is combined with Figure 2 The utility model is further described in detail. For a clearer illustration, only the structure related to the utility model is shown in the figure.

[0019] For the convenience of description, the coordinate system is defined as Figure 2 As shown, the left-right direction is the horizontal direction, the front-back direction is the longitudinal direction, and the up-down direction is the vertical direction.

[0020] The utility model embodiment discloses a wind turbine blade web structure. Figure 2 A wind turbine blade web structure includes a wind turbine blade 1 and a web 2. The wind turbine blade 1 includes two half blades 11 symmetrically bonded together, and the two half blades 11 are connected at the outer side of the butt joint by a connecting piece 8 and a bolt 4.

[0021] A U-shaped first slot 3 is welded on the inner side of the wind turbine blade 1 at the position where the web 2 is installed. Both sides of the web 2 are clamped in the first slot 3, and one end of the web 2 is connected to one of the first slots 3 by bolts 4, and the other end is bonded to the other first slot 3. An inner connecting plate 7 is arranged between adjacent webs 2. A U-shaped second slot 5 capable of clamping the inner connecting plate 7 is welded on the web 2, and both sides of the inner connecting plate 7 are clamped in the second slot 5 on the web 2. Both sides of the inner connecting plate 7 are connected to the second slot 5 by bolts 4.

[0022] In addition, a plurality of downwind strips 6 are spirally arranged on the outer side of the wind turbine blade 1, which are helpful for the over-current transmission of wind when the blade rotates.

[0023] The utility model welds a first slot 3 inside a wind turbine blade 1, then clamps a web 2 in the first slot 3, and one end of the web 2 is connected to the first slot 3 by bolts 4, and the other end is bonded to another first slot 3. The web 2 can be installed on the wind turbine blade 1, and stress concentration caused by grooving on the wind turbine blade 1 can be avoided, thereby ensuring the strength of the wind turbine blade 1.

[0024] In addition, by arranging the inner connecting plates 7 between the webs 2, the webs 2 are connected as a whole, thereby improving the overall connection strength.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be understood that the specific implementation methods described herein are only used to understand the present utility model, and are not used to limit the present utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.

Claims

1. A wind turbine blade web structure, comprising a wind turbine blade and a web, characterized in that: A U-shaped first slot is welded on the wind turbine blade at the position where the web is installed, and both sides of the web are clamped in the first slots, and one end of the web is connected to one of the first slots by bolts, and the other end is adhesively connected to the other first slot. An inner connecting plate is provided between adjacent webs, and a U-shaped second slot that can clamp the inner connecting plate is welded on the web, and both sides of the inner connecting plate are clamped in the second slots on the web. A plurality of downwind strips are spirally arranged on the outer side of the wind turbine blade.

2. A wind turbine blade web structure according to claim 1, characterized in that: The wind turbine blade comprises two half blades symmetrically bonded together.

3. The wind turbine blade web structure according to claim 1, characterized in that: The two half blades are connected at the outside of the butt joint by connecting plates and bolts.

4. The wind turbine blade web structure according to claim 1, characterized in that: The two sides of the inner connecting plate are connected with the second clamping groove bolts.

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