Mounting bracket and mounting method for gas-heat deicing equipment in blade of wind generating set

Abstract

The invention discloses a mounting bracket and a mounting method for gas-heat deicing equipment in a blade of a wind generating set. The installation support comprises an air blower installation frame and a heater installation frame, and the air blower installation frame and the heater installation frame are installed on the inner surface of a blade rear edge cavity parallel to a blade web. An air blower mounting surface of the air blower mounting rack and a heater mounting surface of the heater mounting rack are respectively distributed obliquely upwards, the air blower mounting rack and the heater mounting rack are sequentially arranged at an interval of L, and the heater mounting surface and the air blower mounting surface have the same inclination angle theta; and the distance L between the air blower mounting rack and the heater mounting rack is equal to S cos theta-H sin theta-(L1 + L2) / 2. According to the invention, all gas-heat deicing equipment of the gas-heat deicing system in one blade can be mounted through one-time variable pitch, and the mounting bracket, the air guide pipe and the airflow baffle can be constructed by hand pasting at the same time, so that the construction and mounting period of the gas-heat deicing equipment is greatly shortened.

Description

Technical Field

[0001] This invention relates to the installation of internal air-thermal de-icing equipment for wind turbine blades, and in particular to a mounting bracket and installation method for internal air-thermal de-icing equipment for wind turbine blades. Background Technology

[0002] Thermal de-icing is an effective method for de-icing wind turbine blades. It melts and removes the ice layer on the blades by heating the air inside the blades and conducting the heat to the outer surface, thus ensuring the normal operation of wind turbines in winter and freezing environments.

[0003] like Figure 1 As shown, the current design of the mounting brackets for the air-thermal de-icing equipment (blower and heater) inside the blades of wind turbine generators is relatively low, considering stability, safety, and accessibility within the turbine. Consequently, the height of the blower and heater on the inner surface of the blade is low. To ensure proper connection between the heater's outlet and the inlet of the air duct 13 mounted on the blade web 15, the blower and heater bracket 14 must be installed near the leading edge of the PS or SS sides of the blade, close to the blade web 15. This results in the blower and heater bracket 14's installation position inside the blade not being on the same or parallel plane as the air duct 13 and the airflow baffle 12. Since construction inside the blade can only be carried out horizontally, each blade requires two pitch adjustments to complete the installation of the air-thermal de-icing equipment.

[0004] During installation, first adjust the hub to ensure the working blades are in a horizontal position, then perform two pitch adjustments, installing the gas-thermal de-icing equipment in two stages. Figure 1 As shown in (a), after the first pitch change, the blade position shifts by a certain angle, so that the blower and heater bracket 14 are in a nearly horizontal position within the blade. Then, fiberglass cloth, resin, and structural adhesive are hand-laid to fix the blower and heater bracket 14. Afterward, the structural adhesive and resin are allowed to initially cure. The hand-layup materials used are mainly fiberglass cloth, resin, and structural adhesive. Since the resin and structural adhesive have a relatively long curing time—generally 4 hours in summer and 6 hours in winter with heating—and the initial curing of the structural adhesive and resin is a necessary step (because if the structural adhesive and resin are not initially cured before the second pitch change, the blower and heater bracket 14 will move under gravity and centrifugal force, causing the hand-layup to fail and the installation of the blower and heater bracket 14 to fail). After the structural adhesive and resin have initially cured, the blade can continue with the second pitch change, but it cannot yet generate electricity. Figure 1As shown in (b), after the second pitch change, the blade web 15 is in a horizontal state. The air duct 13 and the airflow baffle 12 are installed by hand lay-up with fiberglass cloth, resin and structural adhesive. The multiple sections of air duct 13 are laid flat and hand-laid onto the blade web 15. The airflow baffle 12 is hand-laid onto the inner cavity of the leading edge to separate the leading edge cavity and form an airflow channel. At this time, the structural adhesive and resin also need a preliminary curing time. Generally, it takes 4 hours in summer and 6 hours in winter when heated. To ensure that the wind turbine generates electricity normally, the curing time of the structural adhesive and resin should be at least 12 hours. Otherwise, the blower and heater support 14 will move due to gravity and centrifugal force.

[0005] Therefore, due to the excessively long waiting time, installing air-thermal de-icing equipment inside a single blade takes at least two days, and completing the installation of air-thermal de-icing equipment inside all three blades of the entire wind turbine takes at least six days. For wind power companies, a single day of power outage on a 2MW wind turbine results in an average loss of over 10,000 kilowatt-hours of electricity. For construction companies, each additional day of construction time adds tens of thousands of yuan to their costs. Therefore, it is necessary to provide a new air-thermal de-icing equipment bracket to reduce the construction time for installing air-thermal de-icing equipment inside the blades. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that, in view of the shortcomings of the existing wind turbine blade internal air-thermal de-icing equipment which requires two pitch changes to be installed, the present invention provides a wind turbine blade internal air-thermal de-icing equipment installation frame and installation method that can complete the installation of all internal air-thermal de-icing equipment in a single blade with a single pitch change.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A mounting bracket for an internal air-thermal de-icing device for wind turbine blades includes a first base, a blower mounting bracket connected to the first base, a second base, and a heater mounting bracket connected to the second base, wherein:

[0009] The first base and the second base are used to be installed on the inner surface of the trailing edge cavity of the blade, which is parallel to the blade web.

[0010] The blower mounting bracket includes a plurality of first columns and a first mounting plate connected to the top of the first columns. A blower mounting surface is formed on the first mounting plate, and the blower mounting surface is distributed obliquely upward relative to the first base.

[0011] The heater mounting bracket includes a plurality of second columns and a second mounting plate connected to the top of the second columns. A heater mounting surface is formed on the second mounting plate, and the heater mounting surface is distributed obliquely upward relative to the second base.

[0012] The blower mounting bracket and the heater mounting bracket are arranged sequentially with a spacing L between them. Both the heater mounting surface and the blower mounting surface have the same inclination angle θ. The height of the heater mounting surface is greater than the height of the blower mounting surface. The spacing L between the blower mounting bracket and the heater mounting bracket is L = S cosθ - H sinθ - (L1 + L2) / 2. The lower end height h1 of the blower mounting surface is h1 = Rcosθ + H3 - R - (H + H5) / cosθ - (L3 - Rsinθ)tanθ. The lower end height of the heater mounting surface is...

[0013] h2=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ+(L1 / 2-L2 / 2+

[0014] S cosθ-H sinθ)tanθ+H / cosθ, where S is the center distance between the blower and the heater, H is the height difference between the installation planes of the blower and the heater, L1 is the horizontal projected length of the blower mounting bracket, L2 is the horizontal projected length of the heater mounting bracket, H3 is the center height of the air duct, H5 is the center height of the heater, L3 is the horizontal distance from the bottom of the mounting bracket to the air duct, and R is the bending radius of the connecting air duct.

[0015] Furthermore, the heater mounting bracket also includes several horizontal reinforcing beams connected between two adjacent second columns. The second column is divided into a lower column section fixedly connected to the second base and an upper column section fixedly connected to the second mounting plate by the horizontal reinforcing beams. The several horizontal reinforcing beams are connected end to end in sequence to form a closed frame and are connected between the lower column section and the upper column section.

[0016] Furthermore, a diagonal reinforcing beam is also connected between the horizontal reinforcing beam and the connected second column, and the diagonal reinforcing beam, together with the connected horizontal reinforcing beam and the second column, forms a triangular structure.

[0017] Furthermore, when the distance L between the blower mounting bracket and the heater mounting bracket is greater than 0, the mounting bracket further includes a reinforcing bracket connected between the blower mounting bracket and the heater mounting bracket.

[0018] Furthermore, the reinforcing bracket includes three reinforcing beams connected between a pair of first columns and a pair of second columns, with each end of the reinforcing beam connected to the corresponding first column and second column, and the three reinforcing beams spliced ​​together in a Z-shape.

[0019] Furthermore, the blade mounting surfaces of both the first base and the second base are arc surfaces, and the radii of curvature of the blade mounting surfaces of both the first base and the second base are consistent with the radii of curvature of the inner surface of the blade to be mounted.

[0020] Furthermore, the first base and the second base are an integral structure.

[0021] Furthermore, a reinforcing angle steel is fixedly connected at the connection between the second column and the second base.

[0022] Based on the same inventive concept, the present invention also provides a method for installing an internal air-thermal de-icing device for wind turbine blades, which includes the following steps:

[0023] S1: Select the inner surface of the blade trailing edge cavity that is parallel to the blade web as the mounting surface of the wind turbine blade internal air-heat de-icing equipment mounting bracket.

[0024] S2: Adjust the working blade to a horizontal position, and perform a pitch change to make the working blade pitch so that the blade web is horizontal and facing upward.

[0025] S3: Install the mounting bracket on the mounting surface between the manhole baffle and the blade web of the working blade;

[0026] S4: Install the blower and heater on the mounting bracket, and install and connect the air duct, connecting air duct and airflow baffle to complete the installation of the internal air-heat de-icing equipment for the working blades.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. This invention innovatively designs the installation planes of the blower mounting bracket and heater mounting bracket to be parallel or substantially parallel to the installation planes of the duct and airflow baffle. This allows the installation of all the air-thermal de-icing equipment within a single blade to be completed in one pitch change. Furthermore, by imposing the above-mentioned restrictions on the spacing L of the blower mounting bracket and heater mounting bracket, the lower end height h1 of the blower mounting surface, and the lower end height h2 of the heater mounting surface, the connection between the air duct and the heater is made more natural, completely eliminating connection stress. The mounting bracket, air duct, and airflow baffle can be hand-laid up simultaneously (one-time hand lay-up). Thus, the installation of the air-thermal de-icing equipment within a single blade can be easily completed in less than a day, shortening the construction cycle by more than 50% compared to traditional methods.

[0029] 2. The installation area of ​​the bracket of this invention is between the manhole baffle and the blade web at the blade root. The area is relatively large, the construction environment is relatively spacious, which makes construction more convenient and can further improve construction efficiency.

[0030] 3. After the hand lay-up of the mounting bracket of this invention, it is in a horizontal state and will not slip. The flow of the hand lay-up adhesive is controlled, and the quality of the hand lay-up is more reliable. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 The diagram shows the installation status of the gas-thermal de-icing equipment after two pitch changes. (a) shows the installation position of the blower and heater bracket after the first pitch change; (b) shows the installation position of the air duct and airflow baffle after the second pitch change.

[0033] Figure 2 This is a schematic diagram of the first embodiment of the mounting bracket for the internal air-thermal de-icing device of the wind turbine blade of the present invention;

[0034] Figure 3 for Figure 2 The diagram shows the structure of the mounting bracket in frontal view.

[0035] Figure 4 for Figure 2 The diagram shows the structure of the mounting bracket from the left view angle;

[0036] Figure 5 for Figure 2 The diagram shows the structural structure of the mounting bracket from a top-down view.

[0037] Figure 6 for Figure 2 The diagram shows the structure of the mounting bracket for mounting the blower and heater;

[0038] Figure 7 for Figure 6 A first-view schematic diagram of the installation position of the structure shown inside the blade;

[0039] Figure 8 for Figure 6 A second-view schematic diagram of the installation position of the structure shown inside the blade;

[0040] Figure 9 This is a simplified geometric diagram of the mounting bracket for the internal air-thermal de-icing device of the wind turbine blades according to the present invention.

[0041] Figure 10 This is a schematic diagram of the second embodiment of the mounting bracket for the internal air-thermal de-icing device of the wind turbine blades of the present invention;

[0042] Figure 11 for Figure 10 The diagram shows the installation position of the blower and heater inside the wind turbine blade after the bracket is installed.

[0043] Explanation of reference numerals in the attached drawings: 11 Leading edge of blade, 12 Airflow baffle, 13 Air duct, 14 Blower and heater bracket, 15 Blade web, 2 First base, 3 Blower mounting bracket, 31 First column, 32 First mounting plate, 4 Second base, 5 Heater mounting bracket, 51 Second column, 511 Lower section of column, 513 Upper section of column, 52 Horizontal reinforcing beam, 53 Second mounting plate, 54 Diagonal reinforcing beam, 55 Reinforcing angle steel, 56 Diagonal support beam, 6 Reinforcing bracket, 61 Reinforcing beam, 71 Blower, 72 Heater, 73 Leading edge of blade, 74 Blade web, 75 Air duct, 76 Airflow baffle, 77 Mounting bracket, 78 Connecting duct. Detailed Implementation

[0044] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] See also Figure 2-8 The mounting bracket for the internal air-thermal de-icing equipment of the wind turbine blade provided by the present invention includes a first base 2, a blower mounting bracket 3 connected to the first base 2, a second base 4, a heater mounting bracket 5 connected to the second base 4, and a reinforcing bracket 6 connecting the blower mounting bracket 3 and the heater mounting bracket 5.

[0048] The first base 2 and the second base 4 are used to install on the inner surface of the trailing edge cavity of the blade, which is parallel to the blade web.

[0049] The blower mounting bracket 3 includes four first columns 31 and a first mounting plate 32 connected to the top of the first columns 31. A blower mounting surface is formed on the first mounting plate 32, and the blower mounting surface is obliquely upward relative to the first base 2.

[0050] The heater mounting bracket 5 includes four second columns 51, four horizontal reinforcing beams 52 connecting adjacent second columns 51, and a second mounting plate 53 connected to the top of the second columns 51. The second columns 51 are divided by the horizontal reinforcing beams 52 into a lower column section 511 fixedly connected to the second base 4 and an upper column section 513 fixedly connected to the second mounting plate 53. A heater mounting surface is formed on the second mounting plate 53, and the heater mounting surface is obliquely upward relative to the second base 4.

[0051] Four horizontal reinforcing beams 52 are connected end-to-end to form a closed rectangular frame, connecting the lower section 511 and the upper section 513 of the column. This closed rectangular frame enhances the shear resistance of the second column 51 and improves the lateral structural strength and stability of the heater mounting bracket 5. The first base 2 and the second base 4 are installed on the inner surface of the blade trailing edge cavity. The air outlet of the heater 72 connects to the air inlet of the air duct 75 installed on the blade web 15. Therefore, the second column 51 supporting the heater 72 is relatively long, resulting in a higher overall height for the heater mounting bracket 5. Adding the horizontal reinforcing beams 52 further increases the strength of the heater mounting bracket 5. Obviously, for ease of transportation, the second column 51 can be designed as a split structure consisting of a lower section 511 and an upper section 513. The lower section 511 and the upper section 513 are bolted together, and their ends are fixedly connected to the ends of the horizontal reinforcing beam 52, thereby creating more force-guiding paths in the heater mounting bracket 5 and further improving the overall structural strength of the heater mounting bracket 5. The air outlet of the heater 72 can be its own outlet or an outlet connected to a duct. This connecting duct is designed to be independent and connected to the heater 72 via a flange.

[0052] The reinforcing bracket 6 includes three reinforcing beams 61. The first columns 31 on both sides of the blower mounting frame 3 and the second columns 51 on both sides of the heater mounting frame 5 are connected by a reinforcing beam 61. The third reinforcing beam 61 is connected between the other two reinforcing beams 61, so that the three reinforcing beams 61 are spliced ​​into a Z-shape. The Z-shaped reinforcing bracket 6 is equivalent to forming two triangular stable structures between the blower mounting frame 3 and the heater mounting frame 5, realizing the force transmission between the blower mounting frame 3 and the heater mounting frame 5, and further improving the shear resistance of the first column 31 and the second column 51 as well as the overall strength of the mounting bracket of the present invention.

[0053] A diagonal reinforcing beam 54 is also connected between the horizontal reinforcing beam 52 and the connected second column 51. The diagonal reinforcing beam 54, together with the connected horizontal reinforcing beam 52 and the second column 51, forms a stable triangular structure, which further improves the structural strength of the heater mounting frame 5 under large amplitude conditions.

[0054] The blade connection surfaces of the first base 2 and the second base 4 are both arc surfaces, and the radii of curvature of the blade connection surfaces of the first base 2 and the second base 4 are consistent with the radii of curvature of the inner surface of the blade at the installation location. The steel plate thickness of the first base 2 and the second base 4 ensures that the fiberglass cloth will not deform after being hand-laid under tensile load. The first column 31, the second column 51, and the horizontal reinforcing beam 52 are all made of angle steel. The bottom end of the first column 31 is fully welded to the first base 2, and the bottom end of the second column 51 is fully welded to the second base 4. Reinforcing angle steel 55 is also welded to the connection between the second column 51 and the second base 4 for reinforcement. Similarly, reinforcing angle steel can also be welded to the connection between the first column 31 and the first base 2 for reinforcement.

[0055] The present invention designs the second mounting plate 53 as an inclined surface, which helps to control the overall height of the heater 72 mounted on the heater mounting bracket 5, ensuring that the heater mounting bracket 5 is not too high and affects the structural stability. During installation, only a short section of curved connecting duct 78 is needed between the outlet of the heater 72 and the air guide duct 75 for transition. Then, the air resistance of the connecting duct 78 is reduced by adjusting the bending radius R and the inner surface roughness. The opening size of the curved connecting duct 78 is designed to be consistent with the outlet size of the heater 72.

[0056] The mounting bracket 77 is made of Q345 steel plate and steel profile welded together, and the surface is galvanized and then powder coated.

[0057] like Figure 7 and Figure 8As shown, during installation, the mounting planes of the blower mounting bracket 3 and the heater mounting bracket 5 are basically parallel to the mounting planes of the air duct 75 and the airflow baffle 76 (i.e., the blade web 74). Thus, after adjusting the hub to make the working blade horizontal, only one pitch change is needed. That is, the working blade is pitched until the blade web is horizontal and facing upward. Then, the mounting bracket 77 of the present invention is installed on the inner surface of the blade trailing edge cavity, which is parallel to the blade web, between the manhole baffle and the blade web 74. This allows for the hand lay-up of the internal air-thermal de-icing equipment (including the blower 71, heater 72, air duct 75, and airflow baffle 76) for the working blade. The present invention sets the support construction area between the manhole baffle and the blade web 74. The area is large and the construction environment is relatively spacious. The connection between the air duct 75 and the heater 72 is more natural and can completely eliminate the connection stress. If necessary, the support 77, air duct 75 and airflow baffle 76 can be hand lay-up at the same time. The installation of a blade internal heat de-icing device can be easily completed in less than a day, and the construction cycle is shortened by more than 50%.

[0058] like Figure 9 As shown, the blower mounting bracket 3 and the heater mounting bracket 5 are arranged sequentially with a distance L between them, and the heater mounting surface and the blower mounting surface have the same inclination angle θ. The height of the heater mounting surface is greater than the height of the blower mounting surface. The distance L between the blower mounting bracket 3 and the heater mounting bracket 5 is:

[0059] L=S cosθ-H sinθ-(L1+L2) / 2........................(1),

[0060] The lower end height h1 of the blower mounting surface:

[0061] h1=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ,

[0062] The lower end height h2 of the heater mounting surface:

[0063] h2=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ+(L1 / 2-L2 / 2+

[0064] S cosθ-H sinθ)tanθ+H / cosθ,

[0065] Where S is the center distance between the blower and the heater, H is the height difference between the installation planes of the blower and the heater, L1 is the horizontal projected length of the blower mounting bracket, L2 is the horizontal projected length of the heater mounting bracket, H3 is the center height of the air duct, H5 is the center height of the heater, L3 is the horizontal distance from the bottom of the mounting bracket to the air duct, and R is the bending radius of the connecting air duct.

[0066] The specific calculation process for the low end height h1 of the blower mounting surface and the low end height h2 of the heater mounting surface is as follows: After determining the tilt angle θ based on experience, given the known center height H3 of the air duct, center height H5 of the heater, horizontal distance L3 from the low end of the mounting bracket to the air duct, and bending angle R of the connecting air duct, the following can be determined through geometric relationships:

[0067] h4=Rcosθ+H3-R........................(2);

[0068] l4=L3-Rsinθ........................(3);

[0069] h6=h4-(H+H5) / cosθ........................(4);

[0070] h1=h6-l4tanθ............(5);

[0071] h2=h1+(L1+L)tanθ+H / cosθ........................(6);

[0072] Solving equations (2), (3), (4), and (5) simultaneously, we get:

[0073] h1=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ........................(7);

[0074] Solving equations (1), (6), and (7) simultaneously, we get:

[0075] h2=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ+(L1 / 2-L2 / 2+

[0076] S cosθ-H sinθ)tanθ+H / cosθ............(8).

[0077] like Figure 10 , Figure 11As shown, the first base 2 and the second base 4 of the present invention can also be designed as a whole, and the blower mounting bracket 3 and the heater mounting bracket 5 can also share a second column 51 when needed, without the need for further reinforcement by the reinforcing bracket 6. That is, at least one first column 31 of the blower mounting bracket 3 is replaced by one second column 51 of the heater mounting bracket 5, so that the blower mounting bracket 3 and the heater mounting bracket 5 can transmit force through the first mounting plate 32 and the second column 51 that are fixedly connected.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A mounting bracket for an internal air-thermal de-icing device for wind turbine blades, comprising a first base (2), a blower mounting bracket (3) connected to the first base (2), a second base (4), and a heater mounting bracket (5) connected to the second base (4), characterized in that: The first base (2) and the second base (4) are used to be installed on the inner surface of the trailing edge cavity of the blade, which is parallel to the blade web; The blower mounting bracket (3) includes a plurality of first columns (31) and a first mounting plate (32) connected to the top of the first columns (31). A blower mounting surface is formed on the first mounting plate (32), and the blower mounting surface is obliquely upward relative to the first base (2). The heater mounting bracket (5) includes a plurality of second columns (51) and a second mounting plate (53) connected to the top of the second columns (51). A heater mounting surface is formed on the second mounting plate (53), and the heater mounting surface is obliquely upward relative to the second base (4). The blower mounting bracket (3) and the heater mounting bracket (5) are arranged sequentially with a distance L between them, and the heater mounting surface and the blower mounting surface both have the same inclination angle θ. The height of the heater mounting surface is greater than the height of the blower mounting surface. The distance L between the blower mounting bracket (3) and the heater mounting bracket (5) is S cosθ-H sinθ-(L1+L2) / 2, and the lower end height of the blower mounting surface is... h1 = Rcosθ + H3 - R - (H + H5) / cosθ - (L3 - Rsinθ)tanθ, where the lower end height of the heater mounting surface is... h2=Rcosθ+H3-R-(H+H5) / cosθ-(L3-Rsinθ)tanθ+(L1 / 2-L2 / 2+ S cosθ-H sinθ)tanθ+H / cosθ, where S is the center distance between the blower and the heater, H is the height difference between the installation planes of the blower and the heater, L1 is the horizontal projected length of the blower mounting bracket, L2 is the horizontal projected length of the heater mounting bracket, H3 is the center height of the air duct, H5 is the center height of the heater, L3 is the horizontal distance from the bottom of the mounting bracket to the air duct, and R is the bending radius of the connecting air duct.

2. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 1, characterized in that, The heater mounting bracket (5) also includes several horizontal reinforcing beams (52) connected between two adjacent second columns (51). The second column (51) is divided by the horizontal reinforcing beams (52) into a lower column section (511) fixedly connected to the second base (4) and an upper column section (513) fixedly connected to the second mounting plate (53). The several horizontal reinforcing beams (52) are connected end to end in sequence to form a closed frame and are connected between the lower column section (511) and the upper column section (513).

3. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 2, characterized in that, A diagonal reinforcing beam (54) is also connected between the horizontal reinforcing beam (52) and the connected second column (51). The diagonal reinforcing beam (54) and the connected horizontal reinforcing beam (52) and second column (51) cooperate to form a triangular structure.

4. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 1, characterized in that, When the distance L between the blower mounting bracket (3) and the heater mounting bracket (5) is greater than 0, the mounting bracket further includes a reinforcing bracket (6) connected between the blower mounting bracket (3) and the heater mounting bracket (5).

5. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 4, characterized in that, The reinforcing bracket (6) includes three reinforcing beams (61) connected between a pair of first columns (31) and a pair of second columns (51). The two ends of any one of the reinforcing beams (61) are respectively connected to the corresponding first column (31) and second column (51), and the three reinforcing beams (61) are spliced ​​into a Z-shape.

6. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 1, characterized in that, The blade mounting surfaces of the first base (2) and the second base (4) are both arc surfaces, and the radii of curvature of the blade mounting surfaces of the first base (2) and the second base (4) are consistent with the radii of curvature of the inner surface of the blade to be mounted.

7. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 1, characterized in that, The first base (2) and the second base (4) are an integral structure.

8. The mounting bracket for the internal air-thermal de-icing equipment of wind turbine blades as described in claim 1, characterized in that, A reinforcing angle steel (55) is also fixedly connected at the connection between the second column (51) and the second base (4).

9. A method for installing an internal air-thermal de-icing device for wind turbine blades, characterized in that... Includes the following steps: S1: Select the inner surface of the blade trailing edge cavity that is parallel to the blade web as the mounting surface of the mounting bracket for the air-thermal de-icing equipment of the wind turbine blade as described in any one of claims 1-8. S2: Adjust the working blade to a horizontal position, and perform a pitch change to make the working blade pitch so that the blade web is horizontal and facing upward. S3: Install the mounting bracket on the mounting surface between the manhole baffle and the blade web of the working blade; S4: Install the blower and heater on the mounting bracket, and install and connect the air duct, connecting air duct and airflow baffle to complete the installation of the internal air-heat de-icing equipment for the working blades.

Images