Adjusting piece mechanism of wind power blade beam mold and adjusting method of adjusting piece mechanism

Abstract

The invention discloses a wind power blade beam mold adjusting piece mechanism and an adjusting method thereof, and belongs to the technical field of wind power blade molds. The wind power blade beam mold adjusting piece mechanism comprises a vertical adjusting part, an axial sliding part and a connecting block; the vertical adjusting part is used for being connected with a steel frame and comprises a bolt adjusting fixing plate, a triangular rib plate, a vertical adjusting bolt and a nut, and position adjustment in the vertical direction is achieved by adjusting the nut; the axial sliding part is used for being connected with the skin and comprises a sliding round pipe and at least one set of skin fixing round pipes, the sliding round pipe is sleeved with the skin fixing round pipes, the inner walls of the skin fixing round pipes are in clearance fit with the outer walls of the sliding round pipes, the skin fixing round pipes can slide in the axial direction of the sliding round pipes, and the distance between the two skin fixing round pipes in the same set limits the axial sliding stroke; and the connecting block is connected with the vertical adjusting part and the axial sliding part. The structure is simple and reliable, the position in the vertical direction can be accurately adjusted, the axial displacement requirements of different thermal expansion amounts are flexibly met, and the profile precision and the structural stability of the beam mold are effectively guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine blade mold technology, specifically relating to a wind turbine blade beam mold adjustment mechanism and its adjustment method. Background Technology

[0002] Wind turbine blade beams (such as main beams, auxiliary beams, and UD beams) are the core load-bearing components of wind turbine blades, and their quality directly determines the overall performance and reliability of the blade. Beam molds are key process equipment in the production of these components, typically consisting of a bottom steel frame support and an upper surface skin. During the heating and curing process of the precast beam, due to the beam's enormous axial dimension (usually tens of meters long), and the combined effect of the composite material's curing exothermics and external heating, significant linear expansion occurs along its length. If the mold skin is rigidly fixed, its thermal expansion will be constrained by the steel frame, resulting in a huge interaction force between the skin and the product. This can easily lead to defects such as surface bulges and internal wrinkles, and in severe cases, even product scrap.

[0003] To address the issue of thermal expansion compensation, some mold adjustment mechanisms with sliding functions have emerged in the prior art. For example, Chinese Patent Publication No. CN210758664U discloses a solution that achieves axial sliding and chordal rotation through the hinged engagement of a sliding column and a through hole. This solution involves multiple precision-fitting components such as the hinge and sliding column, requiring high machining accuracy and incurring high manufacturing costs. Furthermore, its sliding stroke is determined by the size of the through hole seat, and once manufactured, it cannot be changed, failing to adapt to the varying thermal expansion requirements of different blade-shaped molds. In addition, most conventional adjustment mechanisms currently only provide vertical adjustment functionality, completely failing to compensate for axial thermal deformation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wind turbine blade beam mold adjustment mechanism and its adjustment method to solve the problems of complex structure, high manufacturing cost and non-adjustable sliding stroke of the adjustment mechanism in the prior art.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a wind turbine blade beam mold adjustment mechanism, comprising: A vertical adjustment section is used to connect with the steel frame of the beam mold and is configured to adjust the relative position of the steel frame and the skin of the beam mold in the vertical direction. An axial sliding part is used to connect with the skin of a beam mold, configured to allow the skin of the beam mold and the steel frame to slide relative to each other along the axial direction of the beam mold. The axial sliding part includes a sliding round tube and at least one set of skin fixing round tubes. Two skin fixing round tubes in the same set are respectively spaced and sleeved on the sliding round tube. The inner wall of the skin fixing round tube and the outer wall of the sliding round tube are in clearance fit. The distance between two skin fixing round tubes in the same set limits the axial sliding stroke of the set of skin fixing round tubes on the sliding round tube. A connecting block is used to connect the vertical adjustment part and the axial sliding part. One end of the connecting block is provided with a semi-circular arc structure that matches the radius of the sliding tube and is welded to the sliding tube through the semi-circular arc structure. The other end is welded to the top of the vertical adjustment bolt.

[0006] Furthermore, the vertical adjustment part includes a bolt adjustment fixing plate, two triangular ribs, a vertical adjustment bolt, and two nuts. The bolt adjustment fixing plate has a through hole in the middle. The two triangular ribs are arranged parallel to each other on both sides of the through hole and welded to the lower left and right sides of the bolt adjustment fixing plate. The vertical adjustment bolt passes vertically through the through hole of the bolt adjustment fixing plate. The two nuts are located above and below the bolt adjustment fixing plate, respectively, to fix the vertical adjustment bolt and adjust its position in the vertical direction.

[0007] Furthermore, the length of the sliding circular tube is determined based on the axial length of the wind turbine blade beam mold.

[0008] Furthermore, all adjustment mechanisms installed on the same side of each section of the wind turbine blade beam mold share a single sliding circular tube.

[0009] Furthermore, the wind turbine blade beam mold adjustment mechanism is arranged at predetermined intervals in the axial direction.

[0010] Furthermore, the set distance is determined based on the support strength of the beam mold skin and the axial length of the beam mold, with a preferred arrangement of one every 0.8-1.2 meters.

[0011] In a second aspect, the present invention provides an adjustment method for the wind turbine blade beam mold adjustment mechanism as described in any one of the first aspects, comprising the following steps: The adjustment mechanism is welded and fixed to the mold steel frame by adjusting the fixing plate and triangular rib plate of the vertical adjustment part through bolts; Based on the expansion characteristics of the mold skin and beam precast products, assess the axial thermal expansion range and determine the required axial sliding stroke. Adjust the installation position of each set of two skin-fixed round tubes on the sliding round tube, and set a specific spacing to limit the maximum axial sliding stroke; The skin fixing tube is fixedly connected to the mold skin; Adjust the vertical position of the mold skin by rotating the nuts on both sides of the vertical adjusting bolt until the surface error meets the design requirements, then fix the nuts.

[0012] Furthermore, during the vertical adjustment process, testing tools are used to measure the surface error of each area of ​​the mold skin, and precise adjustments are made based on the measurement results.

[0013] Furthermore, the skin fixing tube and the mold skin are fixedly connected by pasting fiberglass cloth.

[0014] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: The wind turbine blade beam mold adjustment mechanism and its adjustment method provided by this invention have a simple and reliable structure, mainly composed of round tubes, stiffeners, and standard fasteners, resulting in low manufacturing and maintenance costs. Through the cooperation of vertical adjustment bolts and nuts, the vertical position adjustment of the mold skin can be precisely achieved, effectively ensuring the mold surface accuracy. The axial sliding part adopts a "round tube inside round tube" clearance fit structure, allowing the skin to slide freely along the axial direction when heated, effectively releasing thermal stress and preventing bulging of the blade beam product. By adjusting the installation spacing of the two skin fixing round tubes in the same group on the sliding round tube, the maximum axial sliding stroke can be flexibly set and adjusted during the mold manufacturing stage, thus perfectly adapting to the needs of beam molds with different specifications and different thermal expansion amounts, exhibiting extremely high versatility. At the same time, the adjustment method has clear steps and is easy to operate, effectively guiding practical applications and improving production efficiency and product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the wind turbine blade beam mold adjustment mechanism according to an embodiment of the present invention.

[0016] Figure 2 This is a front view of the wind turbine blade beam mold adjustment mechanism according to an embodiment of the present invention.

[0017] Figure 3 This is a left view of the wind turbine blade beam mold adjustment mechanism according to an embodiment of the present invention.

[0018] In the diagram: 1. Vertical adjustment part; 11. Bolt adjustment fixing plate; 12. Triangular rib plate; 13. Vertical adjustment bolt; 14. Nut; 2. Axial sliding part; 21. Sliding round tube; 22. Fixed round tube; 3. Connecting block; 4. Steel frame; 5. Skin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figures 1 to 3 As shown, this embodiment of the invention provides a wind turbine blade beam mold adjustment mechanism. In practical applications, it is usually arranged at intervals along the axial direction of the beam mold. The specific interval is determined according to the requirements of the beam mold skin support and skin surface accuracy adjustment. All adjustment mechanisms installed on the same side (such as the leading edge side or the trailing edge side) of each mold section share a sliding round tube 21. The length of the sliding round tube 21 is determined according to the axial length of the wind turbine blade beam mold.

[0023] In this embodiment, the wind turbine blade beam mold adjustment mechanism mainly includes a vertical adjustment part 1, an axial sliding part 2, and a connecting block 3.

[0024] The vertical adjustment part 1 is used to connect with the steel frame 4 of the beam mold. Specifically, the vertical adjustment part 1 includes a bolt adjustment fixing plate 11 with a through hole in the middle. On the lower left and right sides of the bolt adjustment fixing plate 11, two triangular rib plates 12 are welded in parallel. The rib plates 12 are welded and fixed to the mold steel frame 4 to enhance the rigidity and stability of the structure. A vertical adjustment bolt 13 passes vertically through the through hole of the bolt adjustment fixing plate 11 and is equipped with two nuts 14. These two nuts 14 are located above and below the bolt adjustment fixing plate 11, respectively. By tightening or loosening these two nuts 14, the bolt adjustment fixing plate 11 can be clamped or released, thereby fixing the vertical adjustment bolt 13 or adjusting its precise position in the vertical direction.

[0025] The axial sliding part 2 is used to connect with the skin 5 of the beam mold. Specifically, the axial sliding part 2 includes a fixedly installed sliding round tube 21 and at least one set of skin fixing round tubes 22. In this embodiment, one set is used as an example, and each set includes two skin fixing round tubes 22. The skin fixing round tubes 22 are sleeved on the sliding round tube 21, and their inner walls are fitted with the outer walls of the sliding round tube 21 with a clearance fit, so that the skin fixing round tubes 22 can slide smoothly along the axial direction of the sliding round tube 21. The distance between the two skin fixing round tubes 22 in the same set directly defines and constitutes the axial sliding stroke of the set of skin fixing round tubes 22 on the sliding round tube 21.

[0026] During the mold making stage, the adjusting mechanism is first welded to the mold steel frame 4 via the bolt adjusting fixing plate 11 and triangular rib plate 12 of the vertical adjusting part 1. During welding, ensure that the bolt adjusting fixing plate 11 remains horizontal to avoid affecting the subsequent vertical adjustment accuracy due to installation tilt. After welding is completed, the mold steel frame 4 with the adjusting mechanism installed is moved as a whole above the pre-cured mold skin 5 and positioned.

[0027] Based on the expansion characteristics of the mold skin and beam precast products, the range of axial thermal expansion that may occur during the curing process is assessed, and the required axial sliding stroke is determined accordingly. Subsequently, based on the assessment results, the installation positions of the two skin fixing tubes 22 on the sliding tube 21 in each group are adjusted, and a specific distance L (i.e., the maximum allowable axial sliding stroke) is set. Then, the skin fixing tubes 22 and the mold skin are fixedly connected by pasting fiberglass cloth.

[0028] After the mold demolding and post-processing are completed, the final surface fine-tuning stage begins. The surface error of each area of ​​the mold skin 5 is measured using a testing tool (such as a laser tracker). Based on the measurement results, the nuts 14 on both sides of the vertical adjusting bolt 13 are rotated. When the nuts 14 are loosened, the vertical adjusting bolt 13 can freely rise and fall along the through hole of the bolt adjusting fixing plate 11, causing the sliding round tube 21, the skin fixing round tube 22, and the corresponding area of ​​the mold skin 5, which are fixed to it via the connecting block 3, to move synchronously, thus achieving vertical position adjustment. After adjusting until the surface error meets the design requirements, the nuts 14 on both sides are tightened. The clamping force between the nuts 14 and the bolt adjusting fixing plate 11 fixes the vertical adjusting bolt 13, thereby ensuring that the surface accuracy of the entire beam mold meets the design standards.

[0029] The connecting block 3 is a key component connecting the vertical adjustment part 1 and the axial sliding part 2. One end of it has a semi-circular arc structure that matches the radius of the outer wall of the sliding tube 21, and fits tightly against the outer wall of the sliding tube 21. This semi-circular arc structure A is welded to the sliding tube 21 to increase the connection contact area and improve the stability under force. The other end of the connecting block 3 is welded and fixed to the top of the vertical adjustment bolt 13 to form a rigid connection, ensuring that the adjustment action of the vertical adjustment part 1 can be stably transmitted to the axial sliding part 2.

[0030] This invention achieves stable support and ensures surface accuracy of wind turbine blade beam molds through the coordinated design of "precise vertical adjustment" and "adaptive compensation for axial thermal deformation". The specific principle is as follows: 1) The vertical adjustment principle is explained as follows: The vertical adjustment part 1 relies on the "bolt-double nut" structure to construct the adjustment mechanism: the bolt adjustment fixing plate 11 and the triangular rib plate 12 form a fixed base, which is rigidly connected to the mold steel frame 4 by welding; the vertical adjustment bolt 13 passes through the through hole of the fixing plate, and achieves its own fixation and lifting by means of the clamping / loosening action of the upper and lower nuts 14 - when the nuts are loosened, the bolt can move freely to adjust the height, and when the nuts are tightened, the position is locked by friction and clamping force, which in turn drives the connecting block 3, the sliding round tube 21 and the skin 5 to adjust synchronously, and finally achieves precise vertical positioning of the mold surface.

[0031] 2) The principle of axial sliding compensation is explained as follows: The axial sliding part 2 achieves thermal expansion compensation through "clearance fit + spacing limitation": The clearance fit between the skin fixing tube 22 and the sliding tube 21 provides freedom for the axial movement of the skin 5; the spacing L of the two skin fixing tubes 22 in the same group limits the maximum sliding stroke (matching the thermal expansion range evaluated by the blade beam). During the curing and heating stage of the beam precast, when the mold skin 5 expands axially due to heat, the skin fixing tube 22 fixed to it can slide freely along the sliding tube 21. Its maximum sliding distance is precisely limited within the preset spacing L, effectively releasing the thermal stress of the skin 5, allowing it to expand synchronously with the beam precast, avoiding the interaction force between the skin 5 and the steel frame 4 due to rigid constraints, thereby completely preventing defects such as bulges and wrinkles in the product.

[0032] 3) The overall coordination mechanism is explained as follows: the connecting block 3 rigidly connects the vertical adjustment part 1 and the axial sliding part 2, so that the supporting force of the mold steel frame 4 is transmitted to the sliding round tube 21 through the vertical adjustment part 1 and the connecting block 3, and then acts on the skin 5 through the skin fixing round tube 22, forming a stable force transmission path; at the same time, the clearance fit of the axial sliding part 2 does not hinder the vertical adjustment action, and the rigid support of the vertical adjustment part 1 does not restrict the axial sliding degree of freedom. The two can perform their functions independently and cooperate with each other, which can not only ensure the accuracy of the mold surface, but also adapt to the thermal deformation requirements, and ultimately improve the production quality and reliability of the wind turbine blade beam.

[0033] Furthermore, this embodiment of the invention also provides an adjustment method for the above-mentioned wind turbine blade beam mold adjustment mechanism, comprising the following steps: The adjustment mechanism is welded and fixed to the mold steel frame by adjusting the fixing plate and triangular rib plate of the vertical adjustment part through bolts; Based on the expansion characteristics of the mold skin and beam precast products, assess the axial thermal expansion range and determine the required axial sliding stroke. Adjust the installation position of each set of two skin-fixed round tubes on the sliding round tube, and set a specific spacing to limit the maximum axial sliding stroke; The skin fixing tube is fixedly connected to the mold skin. Specifically, the skin fixing tube and the mold skin are fixedly connected by pasting fiberglass cloth. Adjust the vertical position of the mold skin by rotating the nuts on both sides of the vertical adjusting bolt until the surface error meets the design requirements, then fix the nuts.

[0034] During the vertical adjustment process, the surface error of each area of ​​the mold skin is measured using inspection tools, and precise adjustments are made based on the measurement results.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wind turbine blade beam mold adjustment mechanism, characterized in that, include: A vertical adjustment section is used to connect with the steel frame of the beam mold and is configured to adjust the relative position of the steel frame and the skin of the beam mold in the vertical direction. An axial sliding part is used to connect with the skin of a beam mold, configured to allow the skin of the beam mold and the steel frame to slide relative to each other along the axial direction of the beam mold. The axial sliding part includes a sliding round tube and at least one set of skin fixing round tubes. Two skin fixing round tubes in the same set are respectively spaced and sleeved on the sliding round tube. The inner wall of the skin fixing round tube and the outer wall of the sliding round tube are in clearance fit. The distance between two skin fixing round tubes in the same set limits the axial sliding stroke of the set of skin fixing round tubes on the sliding round tube. A connecting block is used to connect the vertical adjustment part and the axial sliding part. One end of the connecting block is provided with a semi-circular arc structure that matches the radius of the sliding tube and is welded to the sliding tube through the semi-circular arc structure. The other end is welded to the top of the vertical adjustment bolt.

2. The wind turbine blade beam mold adjustment mechanism according to claim 1, characterized in that, The vertical adjustment part includes a bolt adjustment fixing plate, two triangular ribs, a vertical adjustment bolt, and two nuts. The bolt adjustment fixing plate has a through hole in the middle. The two triangular ribs are arranged parallel to each other on both sides of the through hole and welded to the lower left and right sides of the bolt adjustment fixing plate. The vertical adjustment bolt passes vertically through the through hole of the bolt adjustment fixing plate. The two nuts are located above and below the bolt adjustment fixing plate, respectively, to fix the vertical adjustment bolt and adjust its position in the vertical direction.

3. The wind turbine blade beam mold adjustment mechanism according to claim 2, characterized in that, The length of the sliding circular tube is determined based on the axial length of the wind turbine blade beam mold.

4. The wind turbine blade beam mold adjustment mechanism according to claim 2, characterized in that, All adjustment mechanisms installed on the same side of each section of the wind turbine blade beam mold share a single sliding tube.

5. The wind turbine blade beam mold adjustment mechanism according to claim 2, characterized in that, The wind turbine blade beam mold adjustment mechanism is arranged at predetermined intervals along the axial direction.

6. The wind turbine blade beam mold adjustment mechanism according to claim 5, characterized in that, The set distance is determined based on the support strength of the beam mold skin and the axial length of the beam mold, with a preferred spacing of one every 0.8 to 1.2 meters.

7. A method for adjusting the wind turbine blade beam mold adjusting mechanism as described in any one of claims 1-6, characterized in that, Includes the following steps: The adjustment mechanism is welded and fixed to the mold steel frame by adjusting the fixing plate and triangular rib plate of the vertical adjustment part through bolts; Based on the expansion characteristics of the mold skin and beam precast products, assess the axial thermal expansion range and determine the required axial sliding stroke. Adjust the installation position of each set of two skin-fixed round tubes on the sliding round tube, and set a specific spacing to limit the maximum axial sliding stroke; The skin fixing tube is fixedly connected to the mold skin; Adjust the vertical position of the mold skin by rotating the nuts on both sides of the vertical adjusting bolt until the surface error meets the design requirements, then fix the nuts.

8. The adjustment method according to claim 7, characterized in that, During the vertical adjustment process, the surface error of each area of ​​the mold skin is measured using inspection tools, and precise adjustments are made based on the measurement results.

9. The adjustment method according to claim 7, characterized in that, The fixed circular tube of the skin and the mold skin are fixedly connected by pasting fiberglass cloth.

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