Large megawatt fan transmission chain test bench and construction method

Abstract

The invention discloses a large megawatt fan transmission chain test bench and a construction method, and belongs to the field of wind power generation, the large megawatt fan transmission chain test bench comprises a fixing device, and the fixing device comprises at least one fixing sleeve, a test bench base, a trough plate and a tower simulation tool; by arranging the fixed sleeve, the test bed base, the trough plate and the tower simulation tool, stable installation and load transmission of a tested fan are achieved, the foundation problem that a traditional test bed cannot adapt to a large-capacity fan is solved, and core structure support is provided for subsequent high-strength bearing and accurate testing.

Description

Technical Field

[0001] This invention relates to the field of wind power generation, and in particular to a test bench and construction method for a large-megawatt wind turbine drive train. Background Technology

[0002] Wind energy is a clean and pollution-free renewable energy source, and generating electricity using wind power is very environmentally friendly. Offshore wind power already accounts for a significant proportion of the total installed capacity of renewable energy. However, with the increasing demand for grid parity in the wind power industry and the growing problem of rising costs due to the expansion of development areas from nearshore to deep-sea areas, there is an urgent need to address these demands and issues through various measures and methods. Increasing the capacity of a single wind turbine is the most direct method.

[0003] In the design of large-capacity wind turbines, the most efficient way to increase overall capacity is to increase the impeller diameter and sweep area, which in turn leads to a significant increase in the overall load. Current mainstream testing platforms are developed for 10MW-class wind turbines and cannot provide the high-strength support needed for testing the drivetrain of large-capacity wind turbine units. Furthermore, because the drivetrain of the wind turbine under test needs to be mounted on a test bench, the test bench must provide a reliable connection while withstanding bending moments of hundreds of millimeters; currently, there is no reliable solution for this.

[0004] Therefore, there is a need for a test bench and construction method for a large-megawatt wind turbine drive train that can withstand bending moments of hundreds of meganewton-meters. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to design an assembled pre-embedded fixing system to achieve reliable bearing of bending moments of hundreds of MNm and a stable connection with the tested wind turbine. To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a test bench for a large megawatt wind turbine transmission chain, characterized in that it includes a fixing device, the fixing device including at least one fixing sleeve, a test bench base, a groove plate, and a tower simulation fixture; the fixing sleeve includes a core component and a support component; the core component includes a rectangular steel pipe, a square steel block, and a square steel pipe fixedly connected from top to bottom, at least one layer of rectangular steel plate fixed to the outside of the rectangular steel pipe, and a first circular pipe fixed to the lower part of the square steel pipe; the support component includes a second circular pipe and a circular steel plate fixedly connected, the second circular pipe being fixedly connected to the first circular pipe; the fixing sleeve is embedded in the test bench base, the groove plate is connected and fixed above the test bench base, and the tower simulation fixture is connected and fixed in the middle of the groove plate.

[0006] Furthermore, the fixing sleeve includes a first fixing sleeve, in which a square sealing plate is connected between the square steel pipe and the first round pipe, and the square sealing plate is sealed to the lower part of the square steel pipe.

[0007] Furthermore, the fixing sleeve includes a second fixing sleeve. The core components of the second fixing sleeve include three rectangular steel pipes, a square steel block, and a square steel pipe arranged in sequence. The lower parts of the square steel pipes on both sides are sealed by square sealing plates, and the lower part of the square steel pipe in the middle is sealed by a rectangular sealing plate. The lower part of the rectangular sealing plate is fixedly connected to the first round pipe.

[0008] Furthermore, the second fixing sleeve also includes a first connecting steel pipe and a second connecting steel pipe. The first connecting steel pipe is fixed to the lower part of the square steel block, and the second connecting steel pipe is fixed to the lower part of the square steel pipe and located at the upper part of the rectangular sealing plate. Each second fixing sleeve is provided with two first connecting steel pipes and two second connecting steel pipes.

[0009] Furthermore, the second fixing sleeve also includes a connecting assembly, which includes an L-shaped fixing angle steel. The L-shaped fixing angle steel is fixedly connected to the rectangular steel plate. Each set of second fixing sleeves is equipped with two sets of the connecting assemblies, and the first fixing sleeve and the second fixing sleeve are fixedly connected through the connecting assemblies.

[0010] Furthermore, the fixing device also includes a pressure-bearing component, which includes a leveling steel plate and an L-shaped angle steel. The L-shaped angle steel is fixed to both sides of the leveling steel plate. Each rectangular steel pipe is equipped with one pressure-bearing component, and the pressure-bearing component is connected to a cover plate.

[0011] Furthermore, the circular steel plate has six circular holes distributed at a 60° angle.

[0012] Furthermore, the fixing device also includes a special bolt, one end of which is a square steel block and the other end is a standard structure with threads. The size of the square steel block is smaller than that of the rectangular steel pipe. After the special bolt is inserted into the sleeve, it is rotated 90 degrees to fix it. The groove plate is fixed to the test bench base by the special bolt and can move back and forth.

[0013] A construction method for a large-megawatt wind turbine drive train test bench includes the following steps: S1. All steel components of the fixing device are manufactured uniformly in the factory, including the core component, support component, connecting component, pressure-bearing component, special bolts, channel plate and other supporting components of the fixing sleeve; S2. Assemble the core components of the fixing sleeve: For the first fixing sleeve, weld the rectangular steel pipe, the square steel block, and the square steel pipe; fix the rectangular steel plate and achieve a sealed connection between the square steel pipe and the first round pipe through the square sealing plate; For the second fixing sleeve, weld three rectangular steel pipes, the square steel block, and the square steel pipe in sequence; fix the rectangular steel plate; seal the lower parts of the square steel pipes on both sides through the square sealing plate; seal the lower part of the middle square steel pipe through the rectangular sealing plate and complete the fixed connection between the rectangular sealing plate and the first round pipe; S3. Assemble the support assembly and fix the second round tube to the round steel plate so that the opening of the second round tube corresponds to the first round tube; S4. The foundation of the test bench is poured in layers. After the bottom concrete pad layer is poured, the support assembly is fixed to the bottom plate of the test bench by the bolts. S5. Hoist the core component of the fixed sleeve to the support component and fix and level it, and fix multiple sleeves through the connecting component; S6. Reserve installation space for the pressure-bearing component. After completing the reinforcement binding and concrete pouring of the test bench, install and level the pressure-bearing component, fill it with high-strength grout, and cover it with the cover plate. S7. Install the test bench base, fix the T-shaped groove plate with the special bolts, fix the tower simulation fixture in the middle of the groove plate, and finally fix the wind turbine under test on the tower simulation fixture.

[0014] Furthermore, in step S5, a rectangular steel plate is used as a lifting lug for hoisting the core component of the sleeve. The sleeve is leveled by bolts through six circular holes distributed at 60° angles on the circular steel plate of the supporting component, so that the relative horizontal error of the fixing device is controlled within the millimeter level.

[0015] The beneficial effects of this invention are as follows: by setting a fixed sleeve, test bench base, slot plate and tower simulation tooling, the stable installation and load transfer of the tested wind turbine can be achieved, solving the basic problem that traditional test benches cannot adapt to large-capacity wind turbines, and providing core structural support for subsequent high-strength load-bearing and accurate testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the test bench.

[0017] Figure 2 This is a schematic diagram of the fixing device.

[0018] Figure 3 This is a schematic diagram of the first fixed sleeve.

[0019] Figure 4This is a schematic diagram of the second fixed sleeve.

[0020] Label Explanation: 1. First fixing sleeve; 2. Second fixing sleeve; 21. Rectangular sealing plate; 22. First connecting steel pipe; 23. Second connecting steel pipe; 24. Connecting assembly; 241. L-shaped fixing angle steel; 3. Test bench base; 4. Channel plate; 5. Tower simulation tooling; 6. Core assembly; 61. Rectangular steel pipe; 62. Square steel block; 63. Square steel pipe; 64. Rectangular steel plate; 65. First round pipe; 66. Square sealing plate; 7. Support assembly; 71. Second round pipe; 72. Round steel plate; 8. Pressure-bearing assembly; 81. Leveling steel plate; 82. L-shaped angle steel; 9. Fixing device. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figures 1-4 A test bench for a large-megawatt wind turbine transmission chain includes a fixing device 9, which includes at least one fixing sleeve, a test bench base 3, a groove plate 4, and a tower simulation fixture 5. The fixing sleeve includes a core component 6 and a support component 7. The core component 6 includes a rectangular steel pipe 61, a square steel block 62, and a square steel pipe 63, which are fixedly connected from top to bottom. At least one layer of rectangular steel plate 64 is fixed to the outside of the rectangular steel pipe 61, and a first circular pipe 65 is fixed to the lower part of the square steel pipe 63. The support component 7 includes a second circular pipe 71 and a circular steel plate 72, which are fixedly connected. The second circular pipe 71 and the first circular pipe 65 are fixedly connected. The fixing sleeve is embedded in the test bench base 3. The fixing groove plate 4 is connected above the test bench base 3, and the tower simulation fixture 5 is connected to the middle of the groove plate 4.

[0023] As described above, the fixed sleeve provides a rigid support foundation to ensure the overall structural stability of the test bench; the core component 6 bears and transmits the load of the tested wind turbine, preventing structural deformation during testing; the rectangular steel pipe 61 forms the main frame of the core component 6, providing core load-bearing capacity; the square steel block 62 connects the rectangular steel pipe 61 and the square steel pipe 63, optimizing the load transmission path; the square steel pipe 63 adapts to the installation of the first circular pipe 65, achieving precise docking between the core component 6 and the support component 7; the rectangular steel plate 64 enhances the torsional and bending resistance of the rectangular steel pipe 61, while providing installation points for component connections; the first circular pipe 65 and the second circular pipe 71 are used to realize the core component The fixed connection between the support component 6 and the support assembly 7 ensures the load transmission between the upper and lower components; the circular steel plate 72 is used to disperse the force on the support assembly 7 and improve the stability of the support; the test bench base 3 is used to embed the fixing sleeve and the groove plate 4 to achieve a smooth transition between the upper and lower components; the groove plate 4 is used to flexibly adapt to the installation position of the tower simulation fixture 5 to ensure installation accuracy; the tower simulation fixture 5 is used to simulate the actual installation scenario of the wind turbine to achieve accurate positioning and stable fixation of the wind turbine under test. By setting the fixing sleeve, the test bench base 3, the groove plate 4 and the tower simulation fixture 5, the stable installation and load transmission of the wind turbine under test are achieved, solving the basic problem that traditional test benches cannot adapt to large-capacity wind turbines, and providing core structural support for subsequent high-strength load-bearing and accurate testing.

[0024] Furthermore, the fixing sleeve includes a first fixing sleeve 1, in which a square sealing plate 66 is connected between the square steel pipe 63 and the first round pipe 65, and the square sealing plate 66 is sealed to the lower part of the square steel pipe 63.

[0025] As described above, the square sealing plate 66 seals the bottom of the rectangular steel pipe 61, the square steel block 62, and the square steel pipe 63, forming a top-sealed space to ensure that the embedded part can be embedded in the test bench base 3; to prevent foreign objects such as grout and rainwater from entering the core component 6; to enhance the connection rigidity between the square steel pipe 63 and the first round pipe 65 and optimize the load transfer efficiency; and the first fixing sleeve 1 provides a reliable support unit for the test bench.

[0026] Furthermore, the fixing sleeve includes a second fixing sleeve 2. The core component 6 of the second fixing sleeve 2 includes three rectangular steel pipes 61, a square steel block 62, and a square steel pipe 63 arranged in sequence. The lower parts of the square steel pipes 63 on both sides are sealed by square sealing plates 66, and the lower part of the square steel pipe 63 in the middle is sealed by a rectangular sealing plate 21. The lower part of the rectangular sealing plate 21 is fixedly connected to the first round pipe 65.

[0027] As described above, the second fixed sleeve 2 adopts a structure in which three core components 6 are arranged in sequence. With the differentiated sealing design of the square sealing plates 66 on both sides and the rectangular sealing plate 21 in the middle, it can not only avoid the steel reinforcement structure inside the test bench foundation, but also realize the load transfer between the core component 6 and the first round tube 65 through the rectangular sealing plate 21 in the middle. The multi-core collaborative bearing further improves the overall load tolerance of the sleeve.

[0028] Furthermore, the second fixing sleeve 2 also includes a first connecting steel pipe 22 and a second connecting steel pipe 23. The first connecting steel pipe 22 is fixed to the lower part of the square steel block 62, and the second connecting steel pipe 23 is fixed to the lower part of the square steel pipe 63 and located on the upper part of the rectangular sealing plate 21. Each second fixing sleeve 2 is provided with two first connecting steel pipes 22 and two connecting steel pipes 23.

[0029] As described above, the first connecting steel pipe 22 and the second connecting steel pipe 23 are fixed in layers at different positions of the three core components 6, connecting the dispersed core components 6 into a rigid whole, which significantly improves the structural rigidity and deformation resistance of the second fixing sleeve 2, avoids relative displacement of the core components 6 during high load testing, and ensures test accuracy.

[0030] Furthermore, the second fixing sleeve 2 also includes a connecting component 24, which includes an L-shaped fixing angle steel 241. The L-shaped fixing angle steel 241 is fixedly connected to the rectangular steel plate 64. Each set of second fixing sleeves 2 is equipped with two sets of connecting components 24. The first fixing sleeve 1 and the second fixing sleeve 2 are fixedly connected by the connecting components 24.

[0031] As described above, the connecting component 24, through the fixed cooperation of the L-shaped fixed angle steel 241 and the rectangular steel plate 64, not only further reinforces the three core components 6 inside the second fixed sleeve 2, but also adapts to the mixed installation scenario of the first fixed sleeve 1 and the second fixed sleeve 2. At the same time, the L-shaped structure reserves space for the arrangement of the test bench foundation steel bars, taking into account both structural strength and construction convenience. This arrangement also ensures a high degree of overall integrity.

[0032] Furthermore, the fixing device 9 also includes a pressure-bearing component 8, which includes a leveling steel plate 81 and an L-shaped angle steel 82. The L-shaped angle steel 82 is fixed to both sides of the leveling steel plate 81. Each rectangular steel pipe 61 is equipped with a pressure-bearing component 8, and the pressure-bearing component 8 is connected to a cover plate.

[0033] As described above, the pressure-bearing component 8 is in direct contact with the channel plate 4, providing a flat contact surface, fixing surface, and load transfer surface. At the same time, the leveling steel plate 81 achieves local leveling function, and the L-shaped angle steel 82 on both sides strengthens the structural stability, providing auxiliary pressure support for the rectangular steel pipe 61. Meanwhile, the cover plate can prevent foreign objects from entering the sleeve, extend the service life of the fixing device, and improve the overall installation accuracy.

[0034] Furthermore, the circular steel plate 72 has six circular holes distributed at a 60° angle.

[0035] Specifically, the flatness of the groove plate 4 needs to be ensured, so it needs to have leveling capability. As described above, the six circular holes of the circular steel plate 72 are evenly distributed at 60°, providing multi-directional adjustment points for the connection between the support component 7 and the core component 6. The horizontality of the sleeve can be precisely adjusted by bolts, ensuring that the relative horizontal error of the fixing device is controlled within millimeters, meeting the requirements of high-precision testing.

[0036] Furthermore, the fixing device 9 also includes a special bolt, one end of which is a square steel block and the other end is a standard structure with threads. The size of the square steel block is smaller than that of the rectangular steel pipe 61. After the special bolt is inserted into the sleeve, it is rotated 90 degrees to fix it. The groove plate 4 is fixed to the test bench base 3 by the special bolt and can move back and forth.

[0037] As described above, the special bolt, by setting a square steel block and a threaded structure, can be locked and fixed to the rectangular steel pipe 61 by rotating 90°, taking into account both the reliability of fastening and the replaceability in the future; the special bolt is detachable, and by removing the special bolt, the slot plate 4 can be moved back and forth to adjust different positions to be compatible with fans of different sizes.

[0038] A construction method for a large-megawatt wind turbine drive train test bench includes the following steps: S1. All steel components of the fixing device 9 are manufactured uniformly in the factory, including the core component 6 of the fixing sleeve, the support component 7, the connecting component 24, the pressure-bearing component 8, and supporting parts such as special bolts and channel plates 4. S2. Assemble the core component 6 of the fixing sleeve: For the first fixing sleeve 1, weld a rectangular steel pipe 61, a square steel block 62 and a square steel pipe 63, fix a rectangular steel plate 64 and achieve a sealed connection between the square steel pipe 63 and the first round pipe 65 through a square sealing plate 66; For the second fixing sleeve 2, weld three rectangular steel pipes 61, square steel blocks 62 and square steel pipes 63 in sequence, fix a rectangular steel plate 64, seal the lower part of the square steel pipes 63 on both sides through a square sealing plate 66, seal the lower part of the middle square steel pipe 63 through a rectangular sealing plate 21 and complete the fixed connection between the rectangular sealing plate 21 and the first round pipe 65; S3. Assemble the support assembly 7 and fix the second round tube 71 to the round steel plate 72 so that the opening of the second round tube 71 corresponds to the first round tube 65. S4. The foundation of the test bench is poured in layers. After the bottom concrete pad is poured, the support component 7 is fixed to the bottom plate of the test bench with bolts. S5. Hoist and fix the core component 6 to the support component 7 of the fixed sleeve and fix and level it. Fix multiple sleeves through the connecting component 24. S6. Reserve installation space for pressure-bearing component 8. After completing the reinforcement binding and concrete pouring of the test bench, install and level the pressure-bearing component 8, fill it with high-strength grout, and cover it with a cover plate. S7. Install the test bench base 3, fix the slot plate 4 with special bolts, then fix the tower simulation fixture 5 in the middle of the slot plate 4, and finally fix the wind turbine under test on the tower simulation fixture 5. Specifically, the core component 6, support component 7 and pressure-bearing component 8 are installed separately, which can reduce the overall installation accuracy requirements, because the accuracy can be adjusted multiple times to reduce errors.

[0039] As described above, step S1 ensures uniform quality of steel components, steps S2 and S3 complete the pre-assembly of core components, steps S4 and S6 adapt to the construction rhythm of the test bench foundation, and steps S5 and S7 achieve precise docking and leveling of components to ensure the structural strength and installation accuracy of the test bench. Furthermore, in step S5, the rectangular steel plate 64 is used as a lifting lug to hoist the core component 6 of the sleeve. Through the six circular holes distributed at a 60° angle on the circular steel plate 72 supporting the component 7, bolts are used to level the sleeve, so that the relative horizontal error of the fixing device is controlled within the millimeter level.

[0040] As described above, step S5 uses a rectangular steel plate 64 as a lifting lug, eliminating the need for additional lifting components and saving construction costs; the circular holes in the circular steel plate 72 enable precise leveling, ensuring that the horizontal accuracy of the fixing device meets the high load and high precision testing requirements of the large megawatt wind turbine drive chain, and guaranteeing the accuracy of the test data.

[0041] Please refer to Figures 1-4Embodiment 1 of the present invention is as follows: A test bench for a large megawatt wind turbine transmission chain includes a fixing device 9. The fixing device 9 includes at least one fixing sleeve, a test bench base 3, a groove plate 4, and a tower simulation fixture 5. The test bench base 3 is fixed above the fixing sleeve, the groove plate 4 is fixed on the test bench base 3, and the tower simulation fixture 5 is fixed on the groove plate 4. The fixing sleeve includes a first fixing sleeve 1 and a second fixing sleeve 2. The core of the first fixing sleeve 1 is composed of rectangular steel pipes 61, square steel blocks 62 with rectangular openings, and square steel pipes 63 arranged from top to bottom, and connected in pairs by welding. The rectangular steel pipes 61 are arranged in two layers of four rectangular steel plates 64, totaling eight. Each surface of the steel pipes 61 has two steel plates 64 arranged on the top and bottom. Each steel plate 64 has one round hole on the top and bottom. The rectangular steel pipes 61 and the rectangular steel plates 64 are connected by welding. The lower part of the square steel pipe 63 is sealed with a square sealing plate 66. The lower part of the square sealing plate 66 is connected to the first round pipe 65, and the two are welded together. The first round pipe 65 has two round holes along its diameter at the middle of its height. The second round pipe 71 and the round steel plate 72 of the support component 7 are connected by welding. The second round pipe 71 has two round holes along its diameter at the top, corresponding to the first round pipe 65, and are connected by bolts. The round steel plate 72 has six round holes, and the lines connecting the center of each of the two round holes to the center of the round steel plate 72 form a 60° angle. The second fixing sleeve 2 is similar in structure to the first fixing sleeve 1. The core is composed of a rectangular steel pipe 61, a square steel block 62 with a rectangular opening, and a square steel pipe 63 arranged from top to bottom, and the two are connected by welding together. The rectangular steel pipe 61 is arranged in two layers of four rectangular steel plates 64, totaling eight. Each surface of the steel pipe 61 has two steel plates 64 arranged vertically. Each steel plate 64 has one circular hole at its top and bottom. The rectangular steel pipes 61 and rectangular steel plates 64 are connected by welding. The core component 6 of the second fixing sleeve 2 includes three rectangular steel pipes 61, a square steel block 62, and a square steel pipe 63 arranged sequentially. The lower parts of the square steel pipes 63 on both sides are sealed by square sealing plates 66, and the lower part of the middle square steel pipe 63 is sealed by a rectangular sealing plate 21. The lower part of the rectangular sealing plate 21 is fixedly connected to a first circular pipe 65, which has two circular holes along its diameter at the midpoint of its height. The three rectangular steel pipes 61 are fixed together by a first connecting steel pipe 22, a second connecting steel pipe 23, and a connecting component 24. The first connecting steel pipe 22 is connected to the lower part of the square steel block 62 with rectangular openings of the three sleeve cores 6. There are two of each second fixing sleeve 2. The first connecting steel pipe 22 and the three rectangular steel pipes 61 are connected by welding. The second connecting steel pipe 23 is connected to the lower part of the three square steel pipes 63 and the upper part of the rectangular sealing plate 21. There are two of each second fixing sleeve 2. The three are connected in pairs by welding.The second circular tube 71 and the circular steel plate 72 are connected by welding. The second circular tube 71 has two circular holes at the top along its diameter, corresponding to the first circular tube 65, and are connected by bolts. The circular steel plate 72 has six circular holes, and the lines connecting the center of each of the two circular holes to the center of the circular steel plate 72 form a 60° angle. Each second fixing sleeve 2 consists of two second circular tubes 71 and two circular steel plates 72. The connecting assembly 24 consists of two L-shaped fixing angle steels 241 and a rectangular steel plate. The two L-shaped fixing angle steels 241 are arranged in a 45-degree mirror image. Each end of the L-shaped fixing angle steel 241 has a hole. The L-shaped fixing angle steels 241 and the rectangular steel plate are connected by welding. Two sets of connecting assemblies 24 are arranged for each set of second fixing sleeves 2. The connecting assembly 24 and the sleeve core 6 are connected by bolts. The pressure-bearing component 8 consists of a square steel block with a rectangular opening, a rectangular steel frame composed of an L-shaped angle steel 82, and two L-shaped angle steels 82. The three components are fixed together in pairs by welding. Each rectangular steel pipe 61 is equipped with one pressure-bearing component 8, and each pressure-bearing component 8 is equipped with a cover plate. The two sleeves are fixed together by connecting components 24 and bolts.

[0042] A construction method for a large-megawatt wind turbine drive train test bench includes the following steps: S1. All steel components of the fixing device 9 are manufactured uniformly in the factory, including the core component 6 of the fixing sleeve, the support component 7, the connecting component 24, the pressure-bearing component 8, and supporting parts such as special bolts and channel plates 4. S2. Assemble the core component 6 of the fixing sleeve: For the first fixing sleeve 1, weld a rectangular steel pipe 61, a square steel block 62 and a square steel pipe 63, fix a rectangular steel plate 64 and achieve a sealed connection between the square steel pipe 63 and the first round pipe 65 through a square sealing plate 66; For the second fixing sleeve 2, weld three rectangular steel pipes 61, square steel blocks 62 and square steel pipes 63 in sequence, fix a rectangular steel plate 64, seal the lower part of the square steel pipes 63 on both sides through a square sealing plate 66, seal the lower part of the middle square steel pipe 63 through a rectangular sealing plate 21 and complete the fixed connection between the rectangular sealing plate 21 and the first round pipe 65; S3. Assemble the support assembly 7 and fix the second round tube 71 to the round steel plate 72 so that the opening of the second round tube 71 corresponds to the first round tube 65. S4. The foundation of the test bench is poured in layers. After the bottom concrete pad is poured, the support component 7 is fixed to the bottom plate of the test bench with bolts. S5. Hoist and fix the core component 6 to the support component 7 of the fixed sleeve and fix and level it. Fix multiple sleeves through the connecting component 24. S6. Reserve installation space for pressure-bearing component 8. After completing the reinforcement binding and concrete pouring of the test bench, install and level the pressure-bearing component 8, fill it with high-strength grout, and cover it with a cover plate. S7. Install the test bench base 3, fix the slot plate 4 with special bolts, then fix the tower simulation fixture 5 in the middle of the slot plate 4, and finally fix the wind turbine under test on the tower simulation fixture 5.

[0043] Embodiment 2 of the present invention is as follows: In step S5, a rectangular steel plate 64 is used as a lifting lug to hoist the core component 6 of the sleeve. Through the six circular holes distributed at a 60° angle on the circular steel plate 72 supporting the component 7, bolts are used to level the sleeve, so that the relative horizontal error of the fixing device is controlled within the millimeter level.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A test bench for a large-megawatt wind turbine drive chain, characterized in that, The device includes a fixing device, which includes at least one fixing sleeve, a test bench base, a groove plate, and a tower simulation fixture. The fixed sleeve includes a core component and a support component; The core component includes a rectangular steel pipe, a square steel block and a square steel pipe fixedly connected from top to bottom. At least one layer of rectangular steel plate is fixed to the outside of the rectangular steel pipe, and a first round pipe is fixed to the bottom of the square steel pipe. The support assembly includes a second circular tube and a circular steel plate that are fixedly connected, with the second circular tube being fixedly connected to the first circular tube. The fixing sleeve is embedded in the test bench base, the groove plate is connected and fixed above the test bench base, and the tower simulation tooling is connected and fixed in the middle of the groove plate.

2. The test bench for a large-megawatt wind turbine transmission chain according to claim 1, characterized in that, The fixing sleeve includes a first fixing sleeve, in which a square sealing plate is connected between the square steel pipe and the first round pipe, and the square sealing plate is sealed to the lower part of the square steel pipe.

3. The test bench for the large-megawatt wind turbine drive train according to claim 1, characterized in that, The fixing sleeve includes a second fixing sleeve. The core components of the second fixing sleeve include three rectangular steel pipes, a square steel block, and a square steel pipe arranged in sequence. The lower parts of the square steel pipes on both sides are sealed by square sealing plates, and the lower part of the square steel pipe in the middle is sealed by a rectangular sealing plate. The lower part of the rectangular sealing plate is fixedly connected to the first round pipe.

4. The test bench for the large-megawatt wind turbine drive train according to claim 3, characterized in that, The second fixing sleeve also includes a first connecting steel pipe and a second connecting steel pipe. The first connecting steel pipe is fixed to the lower part of the square steel block, and the second connecting steel pipe is fixed to the lower part of the square steel pipe and located at the upper part of the rectangular sealing plate. Each second fixing sleeve is provided with two first connecting steel pipes and two second connecting steel pipes.

5. The test bench for the large-megawatt wind turbine drive train according to claim 3, characterized in that, The second fixing sleeve also includes a connecting assembly, which includes an L-shaped fixing angle steel. The L-shaped fixing angle steel is fixedly connected to the rectangular steel plate. Each set of second fixing sleeves is equipped with two sets of the connecting assemblies. The first fixing sleeve and the second fixing sleeve are fixedly connected through the connecting assemblies.

6. The test bench for the large-megawatt wind turbine drive train according to claim 1, characterized in that, The fixing device also includes a pressure-bearing component, which includes a leveling steel plate and an L-shaped angle steel. The L-shaped angle steel is fixed to both sides of the leveling steel plate. Each rectangular steel pipe is equipped with one pressure-bearing component, and the pressure-bearing component is connected to a cover plate.

7. The test bench for the large-megawatt wind turbine drive train according to claim 1, characterized in that, The circular steel plate has six circular holes distributed at a 60° angle.

8. The test bench for the large-megawatt wind turbine drive train according to claim 1, characterized in that, The fixing device also includes a special bolt, one end of which is a square steel block and the other end is a standard structure with threads. The size of the square steel block is smaller than that of the rectangular steel pipe. After the special bolt is inserted into the sleeve, it is rotated 90 degrees to fix it. The groove plate is fixed to the test bench base by the special bolt and can move back and forth.

9. A construction method for a test bench for a large-megawatt wind turbine drive chain, characterized in that, Includes the following steps: S1. All steel components of the fixing device are manufactured uniformly in the factory, including the core component, support component, connecting component, pressure-bearing component, special bolts, channel plate and other supporting components of the fixing sleeve; S2. Assemble the core components of the fixing sleeve: For the first fixing sleeve, weld the rectangular steel pipe, the square steel block, and the square steel pipe; fix the rectangular steel plate and achieve a sealed connection between the square steel pipe and the first round pipe through the square sealing plate; For the second fixing sleeve, weld three rectangular steel pipes, the square steel block, and the square steel pipe in sequence; fix the rectangular steel plate; seal the lower parts of the square steel pipes on both sides through the square sealing plate; seal the lower part of the middle square steel pipe through the rectangular sealing plate and complete the fixed connection between the rectangular sealing plate and the first round pipe; S3. Assemble the support assembly and fix the second round tube to the round steel plate so that the opening of the second round tube corresponds to the first round tube; S4. The foundation of the test bench is poured in layers. After the bottom concrete pad layer is poured, the support assembly is fixed to the bottom plate of the test bench by the bolts. S5. Hoist the core component of the fixed sleeve to the support component and fix and level it, and fix multiple sleeves through the connecting component; S6. Reserve installation space for the pressure-bearing component. After completing the reinforcement binding and concrete pouring of the test bench, install and level the pressure-bearing component, fill it with high-strength grout, and cover it with the cover plate. S7. Install the test bench base, fix the T-shaped groove plate with the special bolts, fix the tower simulation fixture in the middle of the groove plate, and finally fix the wind turbine under test on the tower simulation fixture.

10. The construction method according to claim 9, characterized in that, In step S5, the rectangular steel plate is used as a lifting lug to hoist the core component of the sleeve. The sleeve is leveled by bolts through the six circular holes distributed at 60° angles on the circular steel plate of the supporting component, so that the relative horizontal error of the fixing device is controlled within the millimeter level.

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