A multi-directional loading device for simulating wind turbine blade loading conditions

Abstract

The application provides a multi-direction loading device for simulating the load state of a wind turbine blade, and relates to the technical field of wind turbine equipment. A radial second displacement frame is assembled in a support frame, a radial first displacement frame is movably assembled in the radial second displacement frame through a radial first displacement guide column, and a radial first loading assembly drives the radial first displacement frame to move in a second direction in the radial second displacement frame. A 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 driven by a radial second loading assembly to move in a first direction in the radial first displacement frame along the radial second displacement guide column. The first direction and the second direction are perpendicular. A simulated blade is assembled in the radial first displacement block and connected with a torque loading assembly, and the other end is supported by a rotary bearing seat and connected with a driving motor, so that the torque loading, horizontal loading and vertical loading of the wind turbine blade can be simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine equipment, in particular to a multi-directional loading device for simulating the load state of wind turbine blades. BACKGROUND

[0002] With the transformation of the energy industry, the wind turbine power generation method as a representative of clean energy is continuously developing, and the global wind turbine installation scale is continuously expanding, with a cumulative wind power installation of 1021GW. With the continuous service of wind turbine generators, the maintenance and operation needs of mechanical parts are gradually on the agenda, and major accidents often occur due to untimely maintenance or failure to detect early-stage faults. The wind turbine blades, as the core load-bearing components of the wind turbine, are subjected to complex stress states, and during operation, they are continuously subjected to multi-directional dynamic wind loads. This harsh state not only relates to the strength of the blades, but also puts strict requirements on the performance of the installation and fixing devices, such as the pitch bearing at the blade installation end, which often cracks or even breaks due to bearing low-speed multi-directional heavy loads. Therefore, designing a mechanical device that can simulate the complex stress state of wind turbine blades and further realize multi-directional loading experiments of wind turbine blades is of great significance for further exploring the failure mechanism and health state of the blades and their supporting equipment.

[0003] For example, in Chinese patent literature, the patent for invention with publication number CN103499491A and publication date January 8, 2014, named "Multi-axis loading system and loading method", through the cooperation of the first and second pistons with the expanding agent, realizes multi-axis loading of rigid components, but this device only involves horizontal loading and does not involve vertical loading.

[0004] The patent for invention with publication number CN215727329U and publication date February 1, 2022, named "Large sample multi-axis loading device", this test can load the sample in X-axis direction, Y-axis direction, and Z-axis direction, can realize single-axis loading, double-axis loading, and three-axis loading, and can meet various test requirements, but this device has limitations on the loaded objects and cannot load simulated blades and similar cylindrical objects.

[0005] The main problems of the above-mentioned existing technologies are: most of them are horizontal loading, and they cannot realize multi-axis coupling loading including vertical loading, and they have requirements for the shape of the loaded objects, and they are not suitable for simulating wind turbine blades. SUMMARY

[0006] To solve the above-mentioned problems of the existing technologies, the present application provides a multi-directional loading device for simulating the load state of wind turbine blades, which is mainly used for simulating the radial force of wind turbine blades, and realizes multi-axis coupling loading of radial horizontal loading, radial vertical loading, and torque loading of simulated wind turbine blades.

[0007] The present application is realized by the following technical solutions:

[0008] A multi-direction loading device for simulating the load state of a wind turbine blade, characterized in that: the device comprises a simulated blade, a radial first displacement frame, a radial second displacement frame, a support frame and a radial first displacement block; 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 with a radial first loading assembly; the radial first loading assembly drives the radial first displacement frame to move in the radial second displacement frame along a second direction; the radial first displacement block is assembled in the radial first displacement frame through a radial second displacement guide column; the radial first displacement block is connected with a radial second loading assembly; the radial second loading assembly drives the radial first displacement block to move in the radial first displacement frame along a first direction through the radial second displacement guide column; 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 with a torque loading assembly; the other end is supported through a rotary bearing seat and connected with a driving motor.

[0009] Further, the radial first loading assembly adopts an electric cylinder I; the radial second loading assembly adopts an electric cylinder II.

[0010] Further, a tensile and compressive force sensor I is assembled on the telescopic rod of the electric cylinder I; a tensile and compressive force sensor II is assembled on the telescopic rod of the electric cylinder II.

[0011] Further, the torque loading assembly comprises a torque motor and a planetary reducer; the torque motor is connected with the planetary reducer; the planetary reducer is connected with the simulated blade through a shaft coupling and a connecting rod.

[0012] Further, a torque loading support is arranged outside the torque loading assembly; the torque loading support is rigidly connected with the simulated blade.

[0013] Further, a torque and speed sensor is assembled on the connecting rod.

[0014] Further, the simulated blade is assembled in the radial first displacement block through a fixed bearing.

[0015] Further, the radial second displacement frame is assembled in the support frame through an axial displacement guide column.

[0016] Further, the radial first loading assembly applies a load of 0-30KN; the radial second loading assembly applies a load of 0-30KN.

[0017] Further, the torque motor has a rated power of 1.5KW and a rated torque of 9.6NM.

[0018] The working principle of the present application is as follows:

[0019] The simulation paddle rotates under the driving of the driving motor, the torque loading assembly is connected with the simulation paddle, so that the torque load is directly transmitted to the simulation paddle, realizing the torque loading of the simulation paddle; the radial first displacement frame is connected with the radial first loading assembly, the radial first loading assembly drives the radial first displacement frame to move in the radial second displacement frame along the second direction and contacts with the radial first displacement block, so that the load is equally transmitted from the radial first displacement frame to the radial first displacement block and is equally transmitted to the simulation paddle by the radial first displacement block, realizing the loading of the simulation paddle 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 with the radial second loading assembly, the radial first displacement block is driven by the radial second loading assembly to move in the radial first displacement frame along the radial second displacement guide column along the first direction, the simulation paddle will have slight deformation, and the load is equally transmitted to the simulation paddle by the radial first displacement block. In this way, the torque loading and the vertical loading and horizontal loading multi-axis coupling loading suitable for simulating the paddle of the wind turbine are realized.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The present application adopts the radial first displacement frame, the radial second displacement frame, the support frame and the radial first displacement block, and realizes the torque loading and the vertical loading and horizontal loading multi-axis coupling loading through the layer-by-layer nesting of the frames in a more compact structure.

[0022] 2. The torque loading and the vertical loading and horizontal loading of the present application can be independently loaded or combinedly loaded through the layer-by-layer nesting of the frames, and the three loading modes do not affect each other.

[0023] 3. The present application adopts the tension and compression force sensor and the torque and speed sensor, which can accurately collect the load borne by the simulation paddle. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a structural schematic view of the present application;

[0025] Fig. 2 is a top view of the present application;

[0026] Fig. 3 is a sectional view of the present application.

[0027] 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

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present invention specification. 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figs. 1-3 As shown, a multi-directional loading device that simulates the load state of a wind turbine blade includes 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. The radial second displacement frame 5 is assembled in the support frame 2, and 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 along the second direction in the radial second displacement frame 5; 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 along the radial second displacement guide column 16 in the radial first displacement frame 8 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 the drive motor.

[0031] The simulation paddle 1 rotates under the driving of the driving motor, the torque loading assembly is connected with the simulation paddle 1, so that the torque load is directly transmitted to the simulation paddle 1, and the torque loading of the simulation paddle 1 is realized; the radial first displacement frame 8 is connected with the radial first loading assembly 17, the radial first loading assembly 17 drives the radial first displacement frame 8 to move in the radial second displacement frame 5 along the second direction and contact with the radial first displacement block 4, the load is equally transmitted from the radial first displacement frame 8 to the radial first displacement block 4 and then to the simulation paddle 1 by the radial first displacement block 4, and the load is applied to the simulation paddle 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 with the radial second loading assembly 18, the radial first displacement block 4 is driven by the radial second loading assembly 18 to move in the radial first displacement frame 8 along the radial second displacement guide column 16 along the first direction, the simulation paddle 1 is slightly deformed, and the load is equally transmitted from the radial first displacement block 4 to the simulation paddle 1.

[0032] In the embodiment, the second direction is the vertical direction of the simulation paddle 1 in the radial direction, and the first direction is the horizontal direction of the radial direction, so that the torque loading and the vertical loading and horizontal loading multi-axial coupling loading suitable for simulating the paddle of the wind turbine are realized.

[0033] Embodiment 2

[0034] As an embodiment of the embodiment, the radial first loading assembly 17 adopts an electric cylinder I, and the radial second loading assembly 18 adopts an electric cylinder II.

[0035] As shown in Figs. 2-3 , the electric cylinder I telescopic rod is assembled with a tension and compression force sensor I 6, and the electric cylinder II telescopic rod is assembled with a tension and compression force sensor II 19.

[0036] In the implementation, the pull pressure sensor 16 is installed on the telescopic rod of the electric cylinder I, 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 in the second direction along the radial first displacement guide column 7 in the radial second displacement frame 5 and contact the radial first displacement block 4, the load is equally applied to the radial first displacement block 4, the load is equally transmitted to the simulation paddle 1 by the radial first displacement block 4, in the loading process, the load applied to the radial first displacement frame 8 is collected by the pull pressure sensor 16, so that the load borne by the simulation paddle 1 in the second direction is accurately detected; the electric cylinder II is started, the radial first displacement block 4 is driven by the electric cylinder II to move in the first direction along the radial second displacement guide column 16 in the radial first displacement frame 8, the simulation paddle 1 will be slightly deformed, the load is applied to the radial first displacement block 4, and the load is equally transmitted to the simulation paddle 1 by the radial first displacement block 4, the load applied to the radial first displacement block 4 is collected by the pull pressure sensor 19, so that the load borne by the simulation paddle 1 in the first direction is accurately detected.

[0037] In the embodiment, the electric cylinder I and the electric cylinder II both belong to the electric cylinder in the prior art.

[0038] As an example, the radial first loading assembly 17 and the radial second loading assembly 18 both adopt the air cylinder, and the pull pressure sensor is installed on the telescopic rod of the air cylinder.

[0039] As another implementation of the embodiment, the torque loading assembly comprises a torque motor 13 and a planetary reducer 14, the torque motor 13 is connected with the planetary reducer 14, through the reducer mechanism, the load requirement of the torque motor 13 can be reduced, the torque motor 13 is prevented from being damaged due to overload, and the service life of the torque motor 13 is prolonged; the planetary reducer 14 is connected with the simulation paddle 1 through the shaft coupling 11 and the connecting rod 15.

[0040] In the implementation, the torque motor 13 is started, and the torque load is applied to the simulation paddle 1 through the planetary reducer 14, the shaft coupling 11 and the connecting rod 15.

[0041] As an example, the torque loading assembly adopts the torque motor 13, the torque motor 13 is connected with the shaft coupling 11, the connecting rod 15 and the simulation paddle 1. The torque motor 13 is started, and the torque load is applied to the simulation paddle 1 through the shaft coupling 11 and the connecting rod 15.

[0042] Further, the torque loading assembly is externally provided with a torque loading support 12, and the torque loading support 12 is rigidly connected with the simulation paddle 1.

[0043] Further, the connecting rod 15 is equipped with a torque and rotating speed sensor 10. The rotating speed and torque of the simulation paddle 1 after the torque load is applied are collected by the torque and rotating speed sensor 10.

[0044] Embodiment 3

[0045] This embodiment is further detailed and supplemented to the embodiment of the application based on the embodiment 1 or embodiment 2.

[0046] The simulation paddle 1 is equipped in the radial first displacement block 4 through a fixed bearing 9.

[0047] The radial second displacement frame 5 is equipped in the support frame 2 through the axial displacement guide column 3.

[0048] The radial first loading assembly 17 applies a load of 0-30KN; the radial second loading assembly 18 applies a load of 0-30KN.

[0049] The torque motor 13 has a rated power of 1.5KW and a rated torque of 9.6NM.

Claims

1. A multi-directional loading device for simulating the load state of a wind turbine blade, characterized by: 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) 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 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 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 the rotary bearing seat and connected to the drive motor; 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), and the planetary reducer (14) is connected to the simulated blade (1) through a coupling (11) and a connecting rod (15); 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); The simulated blade (1) is assembled in the radial first displacement block (4) via a fixed bearing (9); The radial second displacement frame (5) is assembled in the support frame (2) via the axial displacement guide column (3).

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. The 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 and pressure sensor I (6), and the telescopic rod of the electric cylinder II is equipped with a tension and 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 connecting rod (15) is equipped with a torque and speed sensor (10).

5. 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 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.

6. 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 motor (13) has a rated power of 1.5 kW and a rated torque of 9.6 NM.

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