Multidirectional loading device for simulating load state of blades of wind turbine generator

Abstract

The invention provides a multidirectional loading device for simulating the load state of a blade of a wind turbine generator, and relates to the technical field of wind turbine generator equipment, a radial second displacement frame is assembled in a supporting frame, and a radial first displacement frame is movably assembled in the radial second displacement frame through a radial first displacement guide column; the first radial loading assembly drives the first radial displacement frame to move in the second radial displacement frame in the second direction; the radial first displacement block is assembled in the radial first displacement frame through the radial second displacement guide column, and the radial second loading assembly drives the radial first displacement block to move in the radial first displacement frame along the radial second displacement guide column in the first direction; the first direction is perpendicular to the second direction; one end of the simulation paddle is assembled in the radial first displacement block and connected with the torque loading assembly, the other end of the simulation paddle is supported by the rotary bearing seat and connected with the driving motor, and torque loading, radial horizontal loading and radial vertical loading of the paddle of the wind turbine generator can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine equipment, and in particular to a multi-directional loading device for simulating the load state of a wind turbine blade. Background Art

[0002] With the transformation of the energy industry, wind turbine power generation, as a representative of clean energy, continues to develop, and the global wind turbine installation scale continues to expand, with a total wind power installed capacity of 1021GW. With the continued service of wind turbine generator sets, the maintenance and operation needs of their mechanical parts have gradually been put on the agenda. Core parts often cause major accidents due to untimely maintenance or failure to discover previous faults. The blades of the unit are the core load-bearing components of the wind turbine. The stress state is complex. During the working process, they will be continuously subjected to multi-directional dynamic wind loads. This harsh state is not only related to the strength of the blade body, but also puts strict requirements on the performance of its installation and fixing devices. For example, the variable pitch bearing at the blade installation end often cracks or even breaks due to the low-speed multi-directional heavy load of the blade. Therefore, designing a mechanical device that can simulate the complex stress state of the wind turbine blade, and then realize the multi-directional load test of the wind turbine blade, is of great significance for further exploring the failure mechanism and health status of the blade and its supporting equipment.

[0003] For example, in the Chinese patent literature, the publication number is CN103499491A, the publication date is January 8, 2014, and the name is an invention patent for a multi-axis loading system and loading method. The multi-axis loading of the rigid component is achieved through the cooperation of the expansion agent with the first and second pistons, but the device only involves loading on the horizontal plane and does not involve loading in the vertical direction.

[0004] The publication number is CN215727329U, the publication date is February 1, 2022, and the name is a multi-axis loading device for large specimens. This test can load the specimen in the X-axis direction, Y-axis direction, and Z-axis direction respectively, and can realize uniaxial loading, biaxial loading, triaxial loading and other test loading methods, which can meet various test needs, but the device has some restrictions on the loaded objects and cannot load cylindrical objects such as simulated blades.

[0005] The main problems of the above-mentioned prior art are: most of them are horizontal loading, and multi-axis coupled loading including vertical loading cannot be realized; secondly, there are requirements on the shape of the object to be loaded, and it is not suitable for simulating wind turbine blades. Summary of the invention

[0006] In order to solve the deficiencies of the above-mentioned prior art, the present invention provides a multi-directional loading device for simulating the load state of wind turbine blades, which is mainly used to simulate the force in the radial direction of the wind turbine, and realizes multi-axis coupled loading of the simulated wind turbine blades capable of radial horizontal loading, radial vertical loading and torque loading.

[0007] The present invention is achieved through the following technical solutions: A multi-directional loading device for simulating the load state of a wind turbine blade, characterized in that it comprises a simulated blade, a radial first displacement frame, a radial second displacement frame, a support frame and a radial first displacement block, wherein the radial second displacement frame is assembled in the support frame, the radial first displacement frame is movably assembled in the radial second displacement frame through a radial first displacement guide column, the radial first displacement frame is connected to a radial first loading component, and the radial first loading component drives the radial first displacement frame to move along a second direction in the radial second displacement frame; the radial first displacement block is assembled in the radial first displacement frame through a radial second displacement guide column, and the radial first displacement block is connected to the radial second loading component, and the radial first displacement block is driven by the radial second loading component to move along the radial second displacement guide column in the radial first displacement frame along the first direction; the first direction and the second direction are perpendicular; one end of the simulated blade is assembled in the radial first displacement block and connected to the torque loading component, and the other end is supported by a slewing bearing seat and connected to a drive motor.

[0008] Furthermore, the radial first loading component adopts electric cylinder I; the radial second loading component adopts electric cylinder II.

[0009] Furthermore, a tension pressure sensor I is mounted on the telescopic rod of the electric cylinder I, and a tension pressure sensor II is mounted on the telescopic rod of the electric cylinder II.

[0010] Furthermore, the torque loading assembly includes a torque motor and a planetary reducer, the torque motor is connected to the planetary reducer, and the planetary reducer is connected to the simulated blade via a coupling and a connecting rod.

[0011] Furthermore, a torque loading support is provided outside the torque loading assembly, and the torque loading support is rigidly connected to the simulated blade.

[0012] Furthermore, a torque and speed sensor is mounted on the connecting rod.

[0013] Furthermore, the simulated blade is assembled in the radial first displacement block through a fixed bearing.

[0014] Furthermore, the radial second displacement frame is assembled in the support frame through axial displacement guide pillars.

[0015] Furthermore, the radial first loading component applies a load of 0-30KN; the radial second loading component applies a load of 0-30KN.

[0016] Furthermore, the torque motor has a rated power of 1.5KW and a rated torque of 9.6NM.

[0017] The working principle of the present invention is as follows: The simulated blade rotates under the drive of the driving motor, and the torque loading component is connected to the simulated blade, so the torque load is directly transmitted to the simulated blade, so as to realize the torque loading of the simulated blade; the radial first displacement frame is connected to the radial first loading component, and the radial first loading component drives the radial first displacement frame to move along the second direction in the radial second displacement frame, and contacts with the radial first displacement block, so as to transfer the load from the radial first displacement frame to the radial first displacement block, and then transfer the load from the radial first displacement block to the simulated blade, so as to realize the load on the simulated blade in the second direction; the radial first displacement block is assembled in the radial first displacement frame through the radial second displacement guide column, and the radial first displacement block is connected to the radial second loading component, and the radial second loading component drives the radial first displacement block to move along the radial second displacement guide column in the radial first displacement frame along the first direction, so that the simulated blade will be slightly deformed, and the load is equally transferred from the radial first displacement block to the simulated blade. In this way, the torque loading suitable for simulating the blades of wind turbines and the radial vertical loading, horizontal loading and multi-axis coupling loading are realized.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a radial first displacement frame, a radial second displacement frame, a support frame and a radial first displacement block, and realizes torque loading and radial vertical loading, horizontal loading and multi-axis coupling loading with a more compact structure through nesting between the frames.

[0019] 2. The torque loading, radial vertical loading and horizontal loading of the present invention can be loaded independently or in combination through the nesting of layers between frames, and the three loading methods do not affect each other.

[0020] 3. The present invention adopts a tension and pressure sensor and a torque and speed sensor, which can accurately collect and simulate the load on the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a cross-sectional view of the present invention.

[0022] Figure markings: 1-simulated blade, 2-support frame, 3-axial displacement guide column, 4-radial first displacement block, 5-radial second displacement frame, 6-tension pressure sensor I, 7-radial first displacement guide column, 8-radial first displacement frame, 9-fixed bearing, 10-torque speed sensor, 11-coupling, 12-torque loading support, 13-torque motor, 14-planetary reducer, 15-connecting rod, 16-radial second displacement guide column, 17-radial first loading assembly, 18-radial second loading assembly, 19-tension pressure sensor II. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings of the present invention specification to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1 like Figure 1-Figure 3 As shown, a multi-directional loading device simulating the load state of a wind turbine blade comprises a simulated blade 1, a radial first displacement frame 8, a radial second displacement frame 5, a support frame 2 and a radial first displacement block 4, wherein the radial second displacement frame 5 is assembled in the support frame 2, the radial first displacement frame 8 is movably assembled in the radial second displacement frame 5 through a radial first displacement guide column 7, the radial first displacement frame 8 is connected to a radial first loading component 17, and the radial first loading component 17 drives the radial first displacement frame 8 to move in the radial second displacement frame 5 along a second direction; the radial first displacement block 4 is assembled in the radial first displacement frame 8 through a radial second displacement guide column 16, and the radial first displacement block 4 is connected to a radial second loading component 18, and the radial second loading component 18 drives the radial first displacement block 4 to move in the radial first displacement frame 8 along the radial second displacement guide column 16 along the first direction; the first direction and the second direction are perpendicular; one end of the simulated blade 1 is assembled in the radial first displacement block 4 and connected to the torque loading component, and the other end is supported by a slewing bearing seat and connected to a drive motor.

[0025] The simulated blade 1 rotates under the drive of the driving motor, and the torque loading component is connected to the simulated blade 1, so the torque load is directly transmitted to the simulated blade 1, thereby realizing the torque loading of the simulated blade 1; the radial first displacement frame 8 is connected to the radial first loading component 17, and the radial first loading component 17 drives the radial first displacement frame 8 to move along the second direction in the radial second displacement frame 5, and contacts with the radial first displacement block 4, so as to transfer the load equally from the radial first displacement frame 8 to the radial first displacement block 4, and then transfer the load equally from the radial first displacement block 4 to the simulated blade 1, thereby realizing the load on the simulated blade 1 in the second direction; the radial first displacement block 4 is assembled in the radial first displacement frame 8 through the radial second displacement guide column 16, and the radial first displacement block 4 is connected to the radial second loading component 18, and the radial second loading component 18 drives the radial first displacement block 4 to move along the radial second displacement guide column 16 in the radial first displacement frame 8 along the first direction, the simulated blade 1 will be slightly deformed, and the load is equally transferred from the radial first displacement block 4 to the simulated blade 1.

[0026] In this embodiment, the second direction is the vertical direction of the simulated blade 1 in the radial direction, and the first direction is the horizontal direction of the radial direction, so as to realize torque loading and radial vertical loading and horizontal loading multi-axis coupling loading suitable for simulating wind turbine blades.

[0027] Example 2 As an implementation of this embodiment, the radial first loading component 17 adopts electric cylinder I; the radial second loading component 18 adopts electric cylinder II.

[0028] like Figure 2-Figure 3 As shown, the electric cylinder I telescopic rod is equipped with a tension pressure sensor I6, and the electric cylinder II telescopic rod is equipped with a tension pressure sensor II19.

[0029] During implementation, a tension and pressure sensor Ⅰ6 is installed on the telescopic rod of the electric cylinder Ⅰ, and the electric cylinder Ⅰ is started. The load is applied to the radial first displacement frame 8. The electric cylinder Ⅰ drives the radial first displacement frame 8 to move along the radial first displacement guide column 7 in the radial second displacement frame 5 in the second direction to contact the radial first displacement block 4, and the load is equally applied to the radial first displacement block 4, and the radial first displacement block 4 transfers the equal load to the simulated blade 1. In this loading process, the load applied to the radial first displacement frame 8 is collected by the tension and pressure sensor Ⅰ6, so as to accurately detect the load on the simulated blade 1 in the second direction; the electric cylinder Ⅱ is started, and the radial first displacement block 4 is driven by the electric cylinder Ⅱ to move along the radial second displacement guide column 16 in the radial first displacement frame 8 in the first direction, and the simulated blade 1 will be slightly deformed, and the load is applied to the radial first displacement block 4, and the radial first displacement block 4 transfers the load equally to the simulated blade 1, and the tension and pressure sensor Ⅱ19 collects the load applied to the radial first displacement block 4, so as to accurately detect the load on the simulated blade 1 in the first direction.

[0030] In this embodiment, both electric cylinder I and electric cylinder II are electric cylinders in the prior art.

[0031] As an example, the radial first loading assembly 17 and the radial second loading assembly 18 are both cylinders, and tension pressure sensors are mounted on the telescopic rods of the cylinders.

[0032] As another implementation of this embodiment, the torque loading assembly includes a torque motor 13 and a planetary reducer 14. The torque motor 13 is connected to the planetary reducer 14. Through the deceleration mechanism, the load requirement on the torque motor 13 can be reduced, the torque motor 13 can be prevented from being overloaded and damaged, and the life of the torque motor 13 can be extended; the planetary reducer 14 is connected to the simulated blade 1 through a coupling 11 and a connecting rod 15.

[0033] During implementation, the torque motor 13 is started, and a torque load is applied to the simulated blade 1 through the planetary reducer 14 , the coupling 11 and the connecting rod 15 .

[0034] As an example, the torque loading assembly uses a torque motor 13, which is connected to the simulated blade 1 through a coupling 11 and a connecting rod 15. The torque motor 13 is started, and the torque motor 13 applies a torque load to the simulated blade 1 through the coupling 11 and the connecting rod 15.

[0035] Furthermore, a torque loading support 12 is provided outside the torque loading assembly, and the torque loading support 12 is rigidly connected to the simulated blade 1 .

[0036] Furthermore, a torque and speed sensor 10 is mounted on the connecting rod 15. The torque and speed sensor 10 collects the speed and torque of the simulated blade 1 when the torque load is applied.

[0037] Example 3 This embodiment further elaborates and supplements the implementation mode of the present invention on the basis of Embodiment 1 or Embodiment 2.

[0038] The simulated blade 1 is assembled in the radial first displacement block 4 through a fixed bearing 9 .

[0039] The radial second displacement frame 5 is assembled in the support frame 2 via the axial displacement guide pillars 3 .

[0040] The first radial loading assembly 17 applies a load of 0-30 KN; the second radial loading assembly 18 applies a load of 0-30 KN.

[0041] The torque motor 13 has a rated power of 1.5 KW and a rated torque of 9.6 NM.

Claims

1. A multi-directional loading device for simulating the load state of a wind turbine blade, characterized in that: The invention comprises a simulated blade (1), a radial first displacement frame (8), a radial second displacement frame (5), a support frame (2) and a radial first displacement block (4), wherein the radial second displacement frame (5) is assembled in the support frame (2), the radial first displacement frame (8) is movably assembled in the radial second displacement frame (5) via a radial first displacement guide column (7), the radial first displacement frame (8) is connected to a radial first loading component (17), and the radial first loading component (17) drives the radial first displacement frame (8) to move in the radial second displacement frame (5) along a second direction; The first displacement block (4) is assembled in the radial first displacement frame (8) via a radial second displacement guide column (16), and the radial first displacement block (4) is connected to a radial second loading assembly (18), and the radial second loading assembly (18) drives the radial first displacement block (4) to move along the radial second displacement guide column (16) in the radial first displacement frame (8) along a first direction; the first direction and the second direction are perpendicular; one end of the simulated blade (1) is assembled in the radial first displacement block (4) and connected to the torque loading assembly, and the other end is supported by a slewing bearing seat and connected to a drive motor.

2. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 1, characterized in that: The radial first loading component (17) adopts an electric cylinder I; the radial second loading component (18) adopts an electric cylinder II.

3. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 2, characterized in that: The telescopic rod of the electric cylinder I is equipped with a tension pressure sensor I (6), and the telescopic rod of the electric cylinder II is equipped with a tension pressure sensor II (19).

4. A multi-directional loading device for simulating the load state of a wind turbine blade according to any one of claims 1 to 3, characterized in that: The torque loading assembly comprises a torque motor (13) and a planetary reducer (14); the torque motor (13) is connected to the planetary reducer (14); and the planetary reducer (14) is connected to the simulated blade (1) via a coupling (11) and a connecting rod (15).

5. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: A torque loading support (12) is provided outside the torque loading component, and the torque loading support (12) is rigidly connected to the simulated blade (1).

6. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: The connecting rod (15) is equipped with a torque and speed sensor (10).

7. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: The simulated blade (1) is assembled in the radial first displacement block (4) via a fixed bearing (9).

8. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: The radial second displacement frame (5) is assembled in the support frame (2) via an axial displacement guide column (3).

9. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: The radial first loading component (17) applies a load of 0-30 KN; the radial second loading component (18) applies a load of 0-30 KN.

10. A multi-directional loading device for simulating the load state of a wind turbine blade according to claim 4, characterized in that: The torque motor (13) has a rated power of 1.5 kW and a rated torque of 9.6 NM.

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