Three-section type wind power blade rain cover and assembling method thereof

Abstract

The invention discloses a three-section type wind power blade rain cover and an assembling method thereof, and relates to the technical field of wind power blades. The rainproof cover comprises a fixed base, a sliding seat and a pressing plate, the fixed base is of a circular ring structure composed of three arc-shaped base pieces, the sliding seat is of a circular ring structure, the section of the sliding seat is of an L-shaped structure, the sliding seat comprises three arc-shaped sliding pieces, the pressing plate is of a circular ring structure composed of three arc-shaped pieces, and the sliding seat is slidably connected with the surface, close to the inner side edge, of the top of the fixed base. The pressing plate is fixed to the surface, close to the outer side edge, of the top of the fixed base, one side of the sliding base extends to the position above the pressing plate and is fixedly connected with a cover body, the cover body comprises three arc-shaped connecting plates, extending plates are fixedly connected to the sides, close to the ends, of the arc-shaped connecting plates, and connecting screw rods are fixedly connected to the ends, away from the extending plates, of the arc-shaped connecting plates; the surface of the connecting screw is in threaded connection with a nut. The rain cover solves the problems that in the prior art, installation is not convenient, sealing performance is poor, and variable pitch is limited.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine blades, and in particular to a three-section wind turbine blade rain cover and an assembly method thereof. Background Art

[0002] In the field of wind power generation, wind turbine blades are key components for converting wind energy, and their performance and maintenance are directly related to power generation efficiency and operational safety. Wind turbine blades will experience weather conditions such as rain during normal operation. Rainwater can flow into the wind turbine from the gap between the blade root and the main engine guide cover, affecting the normal operation of the wind turbine. In order to solve the problem of rainwater inflow, wind turbine blades must be equipped with rain covers, which have become an important component of wind turbine blades. The wind turbine blade rain covers widely used in the market are mostly integral or segmented designs with complex splicing. Although the integral rain cover guarantees sealing to a certain extent, it is difficult to install, especially when it is used on large wind turbine blades, it requires the help of large lifting equipment, which is costly and inconvenient to operate, and is particularly inconvenient for later maintenance. Although the segmented rain cover is easy to transport and initially install, it is difficult to achieve an ideal sealing effect due to the gaps that often exist at the splicing points. Long-term erosion by rainwater can easily lead to damage to internal components, affecting the performance and service life of the blades. In addition, the existing segmented rain cover design often limits the free rotation of the blades around the pitch axis, affecting the adjustment flexibility and power generation efficiency of the wind power system. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a three-section wind turbine blade rain cover and an assembly method thereof, which solve the problems of inconvenient installation, poor sealing and limited pitch control in the prior art.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical scheme: a three-section wind turbine blade rain cover, comprising a fixed base, a sliding seat and a pressure plate, the fixed base is composed of three arc-shaped base members to form a circular structure, the sliding seat is a circular structure and has an L-shaped cross-section, the sliding seat comprises three arc-shaped sliding members, the pressure plate is composed of three arc-shaped sheets to form a circular structure, the sliding seat is slidably connected to the surface of the top of the fixed base close to the inner edge, the pressure plate is fixed to the surface of the top of the fixed base close to the outer edge, one side of the sliding seat extends to the top of the pressure plate and is fixedly connected to a cover body, the cover body comprises three arc-shaped connecting plates, the three arc-shaped connecting plates have the same structure, one side of the arc-shaped connecting plate and close to the end is fixedly connected to an extension plate, the end of the arc-shaped connecting plate away from the extension plate is fixedly connected to a connecting screw, and a nut is threadedly connected to the surface of the connecting screw.

[0007] Preferably, the central angles of the arc-shaped base member, the arc-shaped sliding member, the arc-shaped sheet and the arc-shaped connecting plate are all 120°.

[0008] Preferably, a first sealing groove is provided on one side of the inner wall of the arc-shaped base member, a first sealing rubber ring in contact with the outer surface of the arc-shaped sliding member is provided in the first sealing groove, and a mounting hole is provided on the surface of the arc-shaped base member and directly below the arc-shaped sliding member, and the mounting hole is a countersunk hole.

[0009] Preferably, a second sealing groove is provided on one side of the arc-shaped sliding member, and a second sealing rubber ring in contact with the bottom of the pressing plate is provided in the second sealing groove.

[0010] Preferably, a connecting groove is provided at the bottom of one end of the arc-shaped sliding member, a connecting column is fixedly connected to the surface of the connecting groove, and a connecting boss is provided at the bottom of the other end of the arc-shaped sliding member, a limiting hole is provided on the surface of the connecting boss.

[0011] Preferably, the depth of the connecting groove is equal to the thickness of the connecting boss, and the diameter of the limiting hole is matched with the diameter of the connecting column.

[0012] Preferably, the arc-shaped connecting plate includes a first connecting portion connected to the arc-shaped sliding member and a second connecting portion connected to the blade surface, a bending portion is provided between the first connecting portion and the second connecting portion, and the arc-shaped connecting plate and the arc-shaped sliding member are fixed by a first screw.

[0013] Preferably, a clamp is provided on the surface of the cover body, a fixing hole is provided on the surface of the arc-shaped base member, a fastening hole is provided on the surface of the arc-shaped sheet, and the pressure plate is fixed to the fixed base by a second screw.

[0014] A method for assembling a three-section wind turbine blade rain cover, applicable to the above-mentioned three-section wind turbine blade rain cover, comprises the following steps:

[0015] S1, fixing three arc-shaped base members on one side of the hub cover to form a ring structure;

[0016] S2, placing an arc-shaped sliding member in contact with one side of the arc-shaped base member, fixing one of the arc-shaped pieces by a second screw, and then connecting the arc-shaped sliding member with the remaining two arc-shaped sliding members to form a ring structure, and installing the remaining arc-shaped pieces;

[0017] S3, fix one of the arc-shaped connecting plates by the first screw, then connect the second arc-shaped connecting plate to the installed arc-shaped connecting plate, fix it by the nut, finally install the first screw to tighten, and finally install the last arc-shaped connecting plate in the same way;

[0018] S4. Install the clamp so that one side of the cover is in close contact with the blade surface.

[0019] Preferably, in step S2, the first sealing rubber ring is installed before the arc-shaped sliding member is placed, the second sealing rubber ring is inserted before the arc-shaped sheet is fixed, and the second sealing rubber ring is installed in the second sealing groove after the three arc-shaped sliding members are installed.

[0020] (III) Beneficial effects

[0021] The present invention provides a three-section wind turbine blade rain cover and an assembly method thereof, which has the following beneficial effects:

[0022] (1) This three-section wind turbine blade rain cover adopts a three-section structure through the fixed base, sliding seat, pressure plate and cover body, which is convenient for transportation and installation. The three arc-shaped sliding parts are connected to the limit hole to form a whole, which is convenient for the sliding seat to rotate as a whole when the pitch is changed; at the same time, the three arc-shaped connecting plates are overlapped by the extension plate to improve the sealing performance, ensuring the stability and reliability of long-term use.

[0023] (2) The assembly method of the three-section wind turbine blade rain cover has the following advantages: since each component adopts the same three-section structure, there is no need to distinguish them during the installation process, which facilitates the installation and improves the installation efficiency. Compared with the integral structure, the segmented structure is also more convenient to fix and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0025] Figure 2 It is a top view of the main structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the connection between the fixed base, the sliding base and the pressing plate of the present invention;

[0027] Figure 4 It is a cross-sectional view of the fixed base, the sliding base and the pressing plate after being connected in the present invention;

[0028] Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle;

[0029] Figure 6 It is a structural schematic diagram of the arc-shaped sliding member of the present invention;

[0030] Figure 7 It is a cross-sectional view of the arc-shaped connecting plate of the present invention.

[0031] In the figure: 1-fixed base, 101-arc-shaped base member, 102-fixing hole, 103-mounting hole, 104-first sealing groove, 2-sliding seat, 201-arc-shaped sliding member, 202-second sealing groove, 203-connecting groove, 204-connecting column, 205-connecting boss, 206-limiting hole, 3-pressure plate, 301-arc-shaped sheet, 302-fastening hole, 4-cover body, 401-arc-shaped connecting plate, 402-extension plate, 403-connecting screw, 404-nut, 5-hoop, 6-first screw, 7-second screw. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-7 The present invention provides a technical solution: a three-section wind turbine blade rain cover, comprising a fixed base 1, a sliding base 2 and a pressing plate 3, wherein the fixed base 1 is composed of three arc-shaped base members 101 forming a circular ring structure, the sliding base 2 is a circular ring structure and has an L-shaped cross-section, the sliding base 2 includes three arc-shaped sliding members 201, and the pressing plate 3 is composed of three arc-shaped pieces 301 forming a circular ring structure, the sliding base 2 is slidably connected to the surface of the top of the fixed base 1 close to the inner edge, the pressing plate 3 is fixed to the surface of the top of the fixed base 1 close to the outer edge, and one side of the pressing plate 3 is located above the sliding base 2, so as to realize The sliding seat 2 is fixed in the fixed base 1, and one side of the sliding seat 2 extends to the top of the pressure plate 3 and is fixedly connected to the cover body 4. The cover body 4 includes three arc-shaped connecting plates 401. The three arc-shaped connecting plates 401 have the same structure. An extension plate 402 is fixedly connected to one side of the arc-shaped connecting plate 401 near the end. A connecting screw 403 is fixedly connected to the end of the arc-shaped connecting plate 401 away from the extension plate 402. A nut 404 is threadedly connected to the surface of the connecting screw 403. In order to improve the sealing between the arc-shaped connecting plates 401, a rubber pad can be arranged on the surface of the extension plate 402.

[0034] The central angles of the arc base member 101, the arc sliding member 201, the arc sheet 301 and the arc connecting plate 401 are all 120°, and the sizes are uniform, so there is no need to distinguish them during the installation process, which is convenient for installation.

[0035] A first sealing groove 104 is provided on one side of the inner wall of the arc-shaped base member 101. A first sealing rubber ring in contact with the outer surface of the arc-shaped sliding member 201 is provided in the first sealing groove 104. The first sealing rubber ring improves the sealing between the fixed base 1 and the sliding seat 2.

[0036] A mounting hole 103 is provided on the surface of the arc-shaped base member 101 and directly below the arc-shaped sliding member 201 . The mounting hole 103 is a countersunk hole. The arc-shaped base member 101 is mounted on the surface of the hub cover through the mounting hole 103 to achieve fixation of the fixed base 1 .

[0037] A second sealing groove 202 is provided on one side of the arc-shaped sliding member 201. A second sealing rubber ring in contact with the bottom of the pressure plate 3 is provided in the second sealing groove 202, which further improves the sealing performance and prevents dust and sand from entering the interior of the wheel hub cover through the gap.

[0038] A connecting groove 203 is provided at the bottom of one end of the arc-shaped sliding member 201, and a connecting column 204 is fixedly connected to the surface of the connecting groove 203. A connecting boss 205 is provided at the bottom of the other end of the arc-shaped sliding member 201, and a limiting hole 206 is provided on the surface of the connecting boss 205. The depth of the connecting groove 203 is equal to the thickness of the connecting boss 205, and the diameter of the limiting hole 206 is matched with the diameter of the connecting column 204. By adjusting the diameter of the limiting hole 206, a clearance fit, interference fit or transition fit can be designed to meet different needs, thereby improving the installation efficiency of the arc-shaped sliding member 201. For the convenience of installation, it is recommended to use a clearance fit for connection.

[0039] The arc-shaped connecting plate 401 includes a first connecting portion 4011 connected to the arc-shaped sliding member 201 and a second connecting portion 4013 connected to the blade surface. A bending portion 4012 is provided between the first connecting portion 4011 and the second connecting portion 4013. The arc-shaped connecting plate 401 and the arc-shaped sliding member 201 are fixed by a first screw 6. Similarly, in order to improve the sealing between the arc-shaped connecting plate 401 and one side of the arc-shaped sliding member 201, a rubber pad is provided on one side of the first connecting portion 4011.

[0040] A clamp 5 is provided on the surface of the cover body 4, and the clamp 5 improves the sealing performance between the second connecting portion 4013 and the blade surface.

[0041] The surface of the arc base member 101 is provided with a fixing hole 102 , the surface of the arc sheet 301 is provided with a fastening hole 302 , the pressing plate 3 is fixed to the fixed base 1 by a second screw 7 , and the arc sliding member 201 is installed by the second screw 7 .

[0042] A method for assembling a three-section wind turbine blade rain cover, applicable to the above-mentioned three-section wind turbine blade rain cover, comprises the following steps:

[0043] S1, fixing three arc-shaped base members 101 on one side of the hub cover to form an annular structure;

[0044] S2, a curved sliding member 201 is brought into contact with one side of the curved base member 101, and one of the curved pieces 301 is fixed by the second screw 7 to prevent the curved sliding member 201 from falling off, and then the curved sliding member 201 is connected with the remaining two curved sliding members 201 to form a ring structure, and when installing the remaining two curved sliding members 201, the installed curved sliding member 201 can be rotated to prevent the position of the curved piece 301 from affecting the installation, and finally the remaining curved piece 301 is installed;

[0045] S3, fix one of the arc-shaped connecting plates 401 by the first screw 6, then connect the second arc-shaped connecting plate 401 to the installed arc-shaped connecting plate 401, fix it by the nut 404, finally install the first screw 6 to tighten, and finally install the last arc-shaped connecting plate 401 in the same way;

[0046] S4. Install the clamp 5 so that one side of the cover body 4 is in close contact with the blade surface.

[0047] In step S2, the first sealing rubber ring is installed before the arc-shaped sliding member 201 is placed, and the second sealing rubber ring is inserted before the arc-shaped sheet 301 is fixed. After the three arc-shaped sliding members 201 are installed, the second sealing rubber ring is installed in the second sealing groove 202. The position of the second sealing rubber ring can be adjusted by loosening the second screw 7 to increase the gap. During installation, grease can be applied to one side of the arc-shaped base member 101 and one side of the arc-shaped sliding member 201 to reduce rotational friction.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-section wind turbine blade rain cover, comprising a fixed base (1), a sliding base (2) and a pressing plate (3), characterized in that: The fixed base (1) is composed of three arc-shaped base members (101) forming a circular ring structure, the sliding base (2) is a circular ring structure with an L-shaped cross section, the sliding base (2) includes three arc-shaped sliding members (201), the pressing plate (3) is composed of three arc-shaped sheets (301) forming a circular ring structure, the sliding base (2) is slidably connected to a surface of the top of the fixed base (1) close to the inner edge, the pressing plate (3) is fixed to a surface of the top of the fixed base (1) close to the outer edge, and the sliding base (2) is One side of the arc connecting plate (401) extends to the top of the pressure plate (3) and is fixedly connected to a cover body (4), the cover body (4) comprising three arc-shaped connecting plates (401), the three arc-shaped connecting plates (401) having the same structure, an extension plate (402) being fixedly connected to one side of the arc-shaped connecting plate (401) near the end, a connecting screw (403) being fixedly connected to the end of the arc-shaped connecting plate (401) away from the extension plate (402), and a nut (404) being threadedly connected to the surface of the connecting screw (403).

2. The three-section wind turbine blade rain cover according to claim 1, characterized in that: The central angles corresponding to the arc-shaped base member (101), the arc-shaped sliding member (201), the arc-shaped sheet (301) and the arc-shaped connecting plate (401) are all 120°.

3. The three-section wind turbine blade rain cover according to claim 1 is characterized in that: A first sealing groove (104) is provided on one side of the inner wall of the arc-shaped base member (101), a first sealing rubber ring in contact with the outer surface of the arc-shaped sliding member (201) is provided in the first sealing groove (104), and a mounting hole (103) is provided on the surface of the arc-shaped base member (101) and directly below the arc-shaped sliding member (201), and the mounting hole (103) is a countersunk hole.

4. The three-section wind turbine blade rain cover according to claim 1, characterized in that: A second sealing groove (202) is provided on one side of the arc-shaped sliding member (201), and a second sealing rubber ring in contact with the bottom of the pressing plate (3) is provided in the second sealing groove (202).

5. The three-section wind turbine blade rain cover according to claim 1 is characterized in that: A connecting groove (203) is provided at the bottom of one end of the arc-shaped sliding member (201), and a connecting column (204) is fixedly connected to the surface of the connecting groove (203). A connecting boss (205) is provided at the bottom of the other end of the arc-shaped sliding member (201), and a limiting hole (206) is provided on the surface of the connecting boss (205).

6. A three-section wind turbine blade rain cover according to claim 5, characterized in that: The depth of the connecting groove (203) is equal to the thickness of the connecting boss (205), and the diameter of the limiting hole (206) is matched to the diameter of the connecting column (204).

7. The three-section wind turbine blade rain cover according to claim 1, characterized in that: The arc-shaped connecting plate (401) comprises a first connecting portion (4011) connected to the arc-shaped sliding member (201) and a second connecting portion (4013) connected to the surface of the blade, a bending portion (4012) is provided between the first connecting portion (4011) and the second connecting portion (4013), and the arc-shaped connecting plate (401) and the arc-shaped sliding member (201) are fixed by a first screw (6).

8. The three-section wind turbine blade rain cover according to claim 1, characterized in that: The surface of the cover body (4) is provided with a clamp (5), the surface of the arc-shaped base member (101) is provided with a fixing hole (102), the surface of the arc-shaped sheet (301) is provided with a fastening hole (302), and the pressure plate (3) and the fixed base (1) are fixed by a second screw (7).

9. A method for assembling a three-section wind turbine blade rain cover, applicable to a three-section wind turbine blade rain cover according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, fixing three arc-shaped base members (101) on one side of the hub cover to form an annular structure; S2, a curved sliding member (201) is brought into contact with one side of the curved base member (101), one of the curved pieces (301) is fixed by a second screw rod (7), the curved sliding member (201) is then connected with the remaining two curved sliding members (201) to form a ring structure, and the remaining curved pieces (301) are installed; S3. Fix one of the arc-shaped connecting plates (401) by means of a first screw rod (6), then connect the second arc-shaped connecting plate (401) to the installed arc-shaped connecting plate (401), fix them by means of a nut (404), and finally install the first screw rod (6) to tighten them, and finally install the last arc-shaped connecting plate (401) in the same manner; S4. Install the clamp (5) so that one side of the cover (4) is in close contact with the surface of the blade.

10. The method for assembling a three-section wind turbine blade rain cover according to claim 9, characterized in that: In step S2, the first sealing rubber ring is installed before the arc-shaped sliding member (201) is placed, and the second sealing rubber ring is inserted before the arc-shaped sheet (301) is fixed. After the three arc-shaped sliding members (201) are installed, the second sealing rubber ring is installed in the second sealing groove (202).

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