Device for quickly arranging fiber grating sensor for wind turbine generator

Abstract

The utility model relates to the technical field of wind turbine generators, and discloses a device for quickly arranging fiber grating sensors for a wind turbine generator, which comprises a fixing frame, a motor body is fixedly assembled at the bottom of the inner wall of the fixing frame, a speed reducer is arranged on the side surface of the motor body, and an output shaft of the motor body is fixedly sleeved with an internal gear of the speed reducer; the bottom of the speed reducer and the bottom of the inner wall of the fixing frame are fixedly assembled. When stress, strain or other physical quantities of the environment where the fiber grating sensor body is located are changed, the period of the grating or the refractive index of the fiber core is changed, so that the wavelength of the reflected light is changed, and the change condition of the physical quantity to be measured can be obtained by measuring the change of the wavelength of the reflected light before and after the physical quantity is changed. The transmission of main parameters of the pre-tightening force of the end cover is realized, and finite element analysis of the pre-tightening force of the end cover on the bearing is carried out on the collected signals, so that the operation state of the whole bearing is judged and the installation of the bearing is guided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to a device for quickly arranging optical fiber grating sensors on wind turbines. Background Art

[0002] A wind turbine is a system that converts the kinetic energy of wind into electrical energy. The wind turbine includes a wind rotor and a generator. The wind rotor is composed of blades, a hub, reinforcements, etc. In order to assist in monitoring the stable state of the wind turbine bearing, a device for quickly deploying fiber grating sensors in the wind turbine is needed.

[0003] At present, vibration signals are mainly used to monitor the operating status of wind turbine bearings. However, vibration signal-based status monitoring requires the additional installation of vibration sensors and data acquisition equipment, which will increase the total cost of the wind turbine and the complexity of wiring. In addition, sensor failure is not considered when using vibration signals for analysis. At the same time, vibration signals have a low signal-to-noise ratio, which is not conducive to diagnosing early potential faults of the wind turbine, and it is also impossible to provide guidance on the installation of bearings. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a device for quickly arranging fiber grating sensors in a wind turbine generator set to solve the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a device for quickly arranging a fiber grating sensor in a wind turbine, comprising a fixing frame, a motor body is fixedly mounted on the bottom of an inner wall of the fixing frame, a reducer is arranged on the side of the motor body, and the output shaft of the motor body is fixedly sleeved with an internal gear of the reducer, the bottom of the reducer is fixedly mounted with the bottom of the inner wall of the fixing frame, a bearing is fixedly sleeved on the output shaft of the reducer, an end cover is slidably sleeved on the outer edge of the bearing, a bolt is slidably sleeved on the inner wall of the end cover, and the outer edge of the bolt is movably sleeved with the inner wall of the bearing, a nut is threadedly connected to the outer edge of the bolt, a fiber grating sensor body is slidably sleeved on the outer edge of the bolt, a sealing cap is slidably sleeved on the outer edge of the bolt, and a sealing gasket is overlapped on the inner wall of the end cover.

[0006] As a preferred technical solution of the utility model, an anti-wear washer 1 is slidably sleeved on the outer edge of the bolt, and two sides of the anti-wear washer 1 are overlapped with the side of the end cover and the side of the fiber grating sensor body respectively.

[0007] As a preferred technical solution of the utility model, the side of the fiber grating sensor body away from the anti-wear gasket one is overlapped with the anti-wear gasket two, and the inner wall of the anti-wear gasket two is slidably sleeved with the outer edge of the bolt, and the end of the anti-wear gasket two away from the fiber grating sensor body is overlapped with a rubber gasket, and the inner wall of the rubber gasket is slidably sleeved with the outer edge of the bolt.

[0008] As a preferred technical solution of the utility model, a fixing frame is fixedly mounted on the outer edge of the sealing cap, a rubber plate is slidably connected to the side of the inner wall of the fixing frame, and the side of the rubber plate is slidably connected to the side of the bolt.

[0009] As a preferred technical solution of the utility model, a sliding rod is fixedly mounted on the side of the rubber plate, and the side of the sliding rod passes through the inner wall of the fixing frame and is slidably connected to the side of the fixing frame.

[0010] As a preferred technical solution of the utility model, a spring is fixedly connected to the side of the inner wall of the fixing frame, and one end of the spring away from the inner wall of the fixing frame is fixedly connected to the side of the rubber plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The device for quickly arranging fiber grating sensors in wind turbines uses a fiber grating sensor body and an end cap in combination. When the stress, strain or other physical quantities of the environment in which the fiber grating sensor body is located changes, the period of the grating or the refractive index of the core will change, thereby changing the wavelength of the reflected light. By measuring the change in the wavelength of the reflected light before and after the change in the physical quantity, the change in the physical quantity to be measured can be obtained, the transmission of the main parameters of the end cap preload force can be achieved, and the finite element analysis of the collected signal is performed on the preload force of the end cap on the bearing, so as to judge the operating status of the overall bearing and guide the installation of the bearing.

[0013] 2. The device for quickly arranging the fiber grating sensor in the wind turbine set uses a spring and a slide rod to push the rubber plate in the inner wall of the fixed frame, so that the side of the rubber plate is used to assist in limiting the head of the bolt, thereby assisting the sealing cap to stably seal the bolt, and using the inner wall of the sealing cap to assist in protecting the fiber grating sensor body, so that by moving the slide rod until the side of the rubber plate is away from the side of the bolt, the sealing cap can be quickly disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the bearing of the utility model;

[0017] Figure 4 This is a schematic diagram of the front cross-section structure of the slide bar of the utility model;

[0018] Figure 5 For this utility model Figure 4 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. fixing bracket; 2. motor body; 3. reducer; 4. bearing; 5. end cover; 6. bolt; 7. nut; 8. rubber gasket; 9. anti-wear gasket 2; 10. fiber grating sensor body; 11. anti-wear gasket 1; 12. sealing gasket; 13. sealing cap; 14. fixing frame; 15. spring; 16. slide rod; 17. rubber plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 , a device for quickly arranging a fiber grating sensor for a wind turbine, comprising a fixing frame 1, a motor body 2 is fixedly mounted at the bottom of the inner wall of the fixing frame 1, a reducer 3 is arranged on the side of the motor body 2, and the output shaft of the motor body 2 is fixedly sleeved with the internal gear of the reducer 3, the bottom of the reducer 3 is fixedly assembled with the bottom of the inner wall of the fixing frame 1, a bearing 4 is fixedly sleeved on the output shaft of the reducer 3, an end cover 5 is slidably sleeved on the outer edge of the bearing 4, a bolt 6 is slidably sleeved on the inner wall of the end cover 5, and the outer edge of the bolt 6 is movably sleeved with the inner wall of the bearing 4, a nut 7 is threadedly connected to the outer edge of the bolt 6, and a fiber grating sensor is slidably sleeved on the outer edge of the bolt 6 The outer edge of the main body 10 and the bolt 6 are slidably sleeved with a sealing cap 13, and the inner wall of the end cover 5 is overlapped with a sealing gasket 12. Through the coordinated use of the bolt 6 and the nut 7, the side of the bolt 6 is used to pass through the inner wall of the end cover 5 and the inner wall of the bearing 4, thereby assisting the end cover 5 and the bearing 4 to be stably installed. Through the installation of the fiber optic Bragg grating sensor body 10, the fiber optic Bragg grating sensor body 10 utilizes that when the stress, strain or other physical quantities of the environment change, the period of the grating or the refractive index of the core will change, thereby changing the wavelength of the reflected light. By measuring the change in the wavelength of the reflected light before and after the physical quantity changes, the change in the physical quantity of the bearing 4 is obtained.

[0022] In a preferred embodiment, an anti-wear gasket 11 is slidably sleeved on the outer edge of the bolt 6, and the two sides of the anti-wear gasket 11 overlap the side of the end cover 5 and the side of the fiber grating sensor body 10 respectively. By adding the anti-wear gasket 11, the anti-wear gasket 11 is used to provide auxiliary protection for the fiber grating sensor body 10, thereby preventing the side of the fiber grating sensor body 10 from contacting the side of the end cover 5 when the device is operating, thereby preventing the surface of the fiber grating sensor body 10 from being damaged.

[0023] In a preferred embodiment, an anti-wear gasket 2 9 is overlapped on one side of the fiber grating sensor body 10 away from the anti-wear gasket 1 1, and the inner wall of the anti-wear gasket 2 9 is slidably fitted with the outer edge of the bolt 6. An end of the anti-wear gasket 2 9 away from the fiber grating sensor body 10 is overlapped with a rubber gasket 8, and the inner wall of the rubber gasket 8 is slidably fitted with the outer edge of the bolt 6. By adding the anti-wear gasket 2 9, the anti-wear gasket 2 9 is used in combination with the anti-wear gasket 1 11 to stably protect both sides of the fiber grating sensor body 10.

[0024] In a preferred embodiment, the outer edge of the sealing cap 13 is fixedly assembled with a fixing frame 14, and the side of the inner wall of the fixing frame 14 is slidably connected with a rubber plate 17, and the side of the rubber plate 17 is slidably connected to the side of the bolt 6. By adding the rubber plate 17, the side of the rubber plate 17 is tightly fitted with the side of the head of the bolt 6, and the rubber plate 17 assists in stably erecting the sealing cap 13.

[0025] In a preferred embodiment, a sliding rod 16 is fixedly installed on the side of the rubber plate 17, and the side of the sliding rod 16 passes through the inner wall of the fixed frame 14 and is slidably connected to the side of the fixed frame 14. By adding the sliding rod 16, it is convenient to use the sliding rod 16 to slide in the inner wall of the fixed frame 14, and the sliding rod 16 drives the rubber plate 17 to move stably, thereby facilitating the quick disassembly of the auxiliary sealing cap 13 and the bolt 6.

[0026] In a preferred embodiment, a spring 15 is fixedly connected to the side of the inner wall of the fixed frame 14, and one end of the spring 15 away from the inner wall of the fixed frame 14 is fixedly connected to the side of the rubber plate 17. By using the spring 15 and the rubber plate 17 in coordination, the spring 15 is used to push the rubber plate 17 in the inner wall of the fixed frame 14, thereby utilizing the side of the rubber plate 17 to assist the sealing cap 13 in stabilizing the position.

[0027] Working principle: when the device is in use, the rubber gasket 8, the anti-wear gasket 2 9, the fiber grating sensor body 10, and the anti-wear gasket 1 11 are gradually sleeved on the outer edge of the bolt 6, and then the side of the bolt 6 is passed through the end cover 5 and the bearing 4 and threadedly connected with the inner wall of the nut 7, and then the inner wall of the sealing cap 13 is slidably sleeved with the outer edge of the bolt 6, and the spring 15 is used to push the rubber plate 17 in the inner wall of the fixed frame 14, so that the side of the rubber plate 17 is used to assist in limiting the head of the bolt 6, thereby assisting the sealing cap 13 to stably seal the bolt 6, and the inner wall of the sealing cap 13 is used to assist in protecting the fiber grating sensor body 10, so that by moving the sliding rod 16 until the side of the rubber plate 17 is away from the side of the bolt 6, the sealing cap 13 is assisted in quick disassembly.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for quickly arranging fiber grating sensors in a wind turbine, comprising a fixing frame (1), characterized in that: The bottom of the inner wall of the fixing frame (1) is fixedly mounted with a motor body (2), a reducer (3) is arranged on the side of the motor body (2), and the output shaft of the motor body (2) is fixedly sleeved with the internal gear of the reducer (3), the bottom of the reducer (3) is fixedly mounted with the bottom of the inner wall of the fixing frame (1), the output shaft of the reducer (3) is fixedly sleeved with a bearing (4), the outer edge of the bearing (4) is slidably sleeved with an end cover (5), the inner wall of the end cover (5) is slidably sleeved with a bolt (6), and the outer edge of the bolt (6) is movably sleeved with the inner wall of the bearing (4), the outer edge of the bolt (6) is threadedly connected with a nut (7), the outer edge of the bolt (6) is slidably sleeved with a fiber grating sensor body (10), the outer edge of the bolt (6) is slidably sleeved with a sealing cap (13), and the inner wall of the end cover (5) is overlapped with a sealing gasket (12).

2. The device for rapidly deploying fiber grating sensors in wind turbines according to claim 1, characterized in that: The outer edge of the bolt (6) is slidably sleeved with an anti-wear washer (11), and the two sides of the anti-wear washer (11) are overlapped with the side of the end cover (5) and the side of the fiber optic grating sensor body (10) respectively.

3. The device for rapidly deploying fiber grating sensors in wind turbines according to claim 1, characterized in that: The side of the fiber optic Bragg grating sensor body (10) away from the anti-wear gasket one (11) is overlapped with the anti-wear gasket two (9), and the inner wall of the anti-wear gasket two (9) is slidably sleeved with the outer edge of the bolt (6); the end of the anti-wear gasket two (9) away from the fiber optic Bragg grating sensor body (10) is overlapped with the rubber gasket (8), and the inner wall of the rubber gasket (8) is slidably sleeved with the outer edge of the bolt (6).

4. The device for rapidly deploying fiber grating sensors in a wind turbine according to claim 1, characterized in that: The outer edge of the sealing cap (13) is fixedly mounted with a fixing frame (14), the side of the inner wall of the fixing frame (14) is slidably connected with a rubber plate (17), and the side of the rubber plate (17) is slidably connected to the side of the bolt (6).

5. The device for rapidly deploying fiber grating sensors in wind turbines according to claim 4, characterized in that: A sliding rod (16) is fixedly mounted on the side of the rubber plate (17), and the side of the sliding rod (16) passes through the inner wall of the fixing frame (14) and is slidably connected to the side of the fixing frame (14).

6. The device for rapidly deploying fiber grating sensors in a wind turbine according to claim 4, characterized in that: A spring (15) is fixedly connected to the side surface of the inner wall of the fixing frame (14), and one end of the spring (15) away from the inner wall of the fixing frame (14) is fixedly connected to the side surface of the rubber plate (17).

Images