CN218002462U - Dynamic deformation detection system of wind driven generator rotating shaft - Google Patents
Dynamic deformation detection system of wind driven generator rotating shaft Download PDFInfo
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- CN218002462U CN218002462U CN202222977874.5U CN202222977874U CN218002462U CN 218002462 U CN218002462 U CN 218002462U CN 202222977874 U CN202222977874 U CN 202222977874U CN 218002462 U CN218002462 U CN 218002462U
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Abstract
The utility model relates to a dynamic deformation detection system of a wind driven generator rotating shaft, which comprises a flexible reflection tube with a reflective coating, flexible sealing rings arranged at two ends of the flexible reflection tube, a detection pipeline sleeved on the flexible reflection tube, a plurality of groups of optical fibers and grating rulers arranged on the detection pipeline, an image sensor arranged on the detection pipeline and facing the grating rulers, and a controller used for driving a driver to work and generating a curve according to an image collected by the image sensor, wherein a gap exists between the inner wall of the detection pipeline and the outer wall of the flexible reflection tube; a group of optical fibers are arranged at intervals along the axis of the detection pipeline. The application uses the non-contact optical matrix form to detect the dynamic deformation of the detection rotating shaft, can obtain more data, and is not easy to be influenced by the surrounding environment.
Description
Technical Field
The application relates to the technical field of detection, in particular to a dynamic deformation detection system for a rotating shaft of a wind driven generator.
Background
In the working process of the wind driven generator, mechanical energy generated by the rotating fan blades needs to be transmitted to the gear box or the generator through the rotating shaft, and the rotating shaft faces a severe working environment due to the large wind direction and the large variation range of strength. The rotating shaft needs to be checked every time, but the deformation detection of the rotating shaft is difficult to detect due to the fact that people are difficult to reach, detection means and the like.
Most of the existing detection methods are provided with sensors, but the existing detection methods are limited by space influence, the number of the sensors is limited, the sensors can only carry out single-point detection, and the obtained data quantity is insufficient. Meanwhile, under the influence of mechanical vibration and noise, the accuracy of the sensor and the change of the detection position cannot be guaranteed.
Disclosure of Invention
The application provides a dynamic deformation detecting system of aerogenerator pivot uses the optical matrix form of non-contact to detect the dynamic deformation of pivot, can obtain more data, still is difficult for receiving surrounding environment's influence simultaneously.
The above object of the present application is achieved by the following technical solutions:
the application provides a dynamic deformation detecting system of aerogenerator pivot, includes:
the flexible reflecting tube is provided with a reflecting coating;
the flexible sealing rings are arranged at two ends of the flexible reflection tube;
the detection pipeline is sleeved on the flexible reflection pipe, and a gap exists between the inner wall of the detection pipeline and the outer wall of the flexible reflection pipe;
the input ends of the optical fibers are connected with the driver, and the output ends of the optical fibers face the flexible reflection tube;
the grating scales are arranged on the detection pipeline, and one grating scale corresponds to one group of optical fibers;
the image sensor is arranged on the detection pipeline and faces the grating ruler; and
the controller is used for driving the driver to work and generating a curve according to the image acquired by the image sensor;
wherein, a part of the flexible sealing ring is positioned in an annular groove in the detection pipeline; a group of optical fibers are arranged at intervals along the axis of the detection pipeline.
In one possible implementation of the present application, the detection pipeline includes a first arc-shaped half-pipeline and a second arc-shaped half-pipeline detachably connected to the first arc-shaped half-pipeline.
In one possible implementation of the present application, both ends of the flexible reflection tube are provided with a plurality of flexible sealing rings.
In one possible implementation of the present application, the adjacent flexible sealing rings differ in height and/or thickness.
In one possible implementation of the present application, the driver operates continuously during image acquisition, and the image sensor acquires images intermittently.
In one possible implementation manner of the application, a detection cavity is arranged on the detection pipeline and is communicated with the inner wall of the detection pipeline;
the image sensor is positioned in the detection cavity;
the grating ruler is positioned in the detection cavity or on the inner wall of the detection pipeline.
In one possible implementation manner of the present application, a plurality of image sensors are disposed in one detection cavity, and the image sensors are disposed at intervals along an axis of the detection pipeline.
In a possible implementation manner of the present application, a plurality of demarcation indication marks are provided on the grating scale.
On the whole, the dynamic deformation detection system for the rotating shaft of the wind driven generator provided by the application detects the deformation amount of the rotating shaft in a non-contact optical measurement mode, can perform intensive and continuous data acquisition in the circumferential direction of the rotating shaft, and obtains a large amount of data through continuous detection. Meanwhile, the non-contact measurement mode can also isolate the influence caused by vibration, noise and the like, so that the whole detection process can stably run.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic deformation detection system for a rotating shaft of a wind turbine provided in the present application.
Fig. 2 is a partially enlarged schematic view of a flexible reflection tube provided in the present application.
Fig. 3 is a schematic distribution diagram of an optical fiber provided in the present application.
Fig. 4 is a schematic distribution diagram of a detection cavity on a detection pipeline provided by the present application.
Fig. 5 is a schematic position diagram of an optical fiber, a grating scale and an image sensor in a detection cavity provided by the present application.
Fig. 6 is a schematic structural diagram of a detection pipeline provided by the present application.
Fig. 7 is a schematic structural diagram of a grating scale provided in the present application.
Fig. 8 is a diagram illustrating the jitter of a light spot in time according to the present application.
Fig. 9 is a diagram of the temporal jitter of another spot provided by the present application.
Fig. 10 is a block diagram illustrating a structure of a controller provided in the present application.
In the figure, 11, a flexible reflection tube, 12, a reflective coating, 13, a flexible sealing ring, 14, a detection pipeline, 21, an optical fiber, 22, a driver, 23, a grating ruler, 24, an image sensor, 6, a controller, 141, a first arc-shaped half pipeline, 142, a second arc-shaped half pipeline, 143, a detection cavity, 601, a CPU,602, RAM,603, ROM,604, a system bus, 605, a control circuit, 606 and a communication circuit.
Detailed Description
The technical solution of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a dynamic deformation detection system for a wind turbine rotor shaft disclosed in the present application is mainly composed of a flexible reflection tube 11, a flexible sealing ring 13, a detection pipeline 14, an optical fiber 21, a driver 22, a grating scale 23, an image sensor 24, a controller 6, and the like, where the flexible reflection tube 11 is attached to an outer wall of the rotor shaft and rotates along with the rotation of the rotor shaft. The outer surface of the flexible reflection tube 11 is further coated with a reflective coating 12, and the reflective coating 12 is used for reflecting the detection light emitted from the optical fiber 21, as shown in fig. 2.
The two ends of the flexible reflection tube 11 are respectively provided with a flexible sealing ring 13, and a part of the flexible sealing ring 13 is positioned in an annular groove in the detection pipeline 14. The flexible sealing ring 13 has two functions, the first is to prevent dust and the like in the external environment from falling on the reflective coating 12 to influence the reflection path of the detection light, and the second is to form a darkroom between the flexible reflection tube 11 and the detection pipeline 14 to facilitate the image sensor 24 to collect the light spot on the grating ruler 23.
The flexible sealing ring 13 can also absorb the vibration generated by the rotation of the rotating shaft, so that the detection pipeline 14 is not affected by the vibration during the detection process.
In some possible implementations, the flexible reflection tube 11 is made of a coiled material, and is cut to a proper length and then adhered to the outer wall of the rotating shaft during installation.
The detection pipeline 14 is sleeved on the flexible reflection pipe 11, a gap exists between the inner wall of the detection pipeline 14 and the outer wall of the flexible reflection pipe 11, the gap can prevent the flexible reflection pipe 11 from being in physical contact with the detection pipeline 14, and uncontrollable damage to the optical fiber 21, the driver 22, the grating ruler 23 and the image sensor 24 is avoided.
Referring to fig. 3 and 4, a plurality of sets of optical fibers 21 are disposed on the detection pipe 14, an input end of each optical fiber 21 is connected to the driver 22, an output end of each optical fiber 21 faces the flexible reflection pipe 11, when the driver 22 operates, an output end of each optical fiber 21 emits a detection light, and the detection light is reflected after contacting the reflective coating 12 on the flexible reflection pipe 11, so as to form a light spot on the grating scale 23.
In fig. 3 and 4, for the installation of the optical fiber 21, an installation groove may be formed on the outer wall of the detection pipe 14, then a hole is formed in the installation groove, the bottom surface of the installation groove is communicated with the inner wall of the detection pipe 14, one optical fiber 21 is installed in each hole, glue is injected into the hole, and the gap is filled. The gap between the hole and the fiber 21 is exaggerated in the figure for clarity of illustration.
The optical fibres 21 in each group are spaced along the axis of the inspection duct 14, and because the diameter of the optical fibres 21 is very small, relatively dense data acquisition is possible, the denser the data, the more likely the local deformation of the shaft can be reflected.
The number of the grating rulers 23 is the same as the number of the groups of the optical fibers 21, each group of the optical fibers 21 is provided with one grating ruler 23, the detection light emitted by the optical fibers 21 irradiates the grating ruler 23 after being reflected, and deformation data of the corresponding detection position can be obtained by changing the movement of the irradiation position.
Referring to fig. 5, the image sensor 24 is disposed on the detection pipe 14 and faces the grating 23, and is used for capturing the movement of the detection position formed by reflection on the grating 23, and the image captured by the image sensor 24 is processed by the controller 6 to form a curve for reflecting the deformation process or amount at the detection position. The controller 6 simultaneously controls the driver 22 to operate so that the driver 22 and the image sensor 24 can cooperate.
The detection pipeline 14 is fixed by a support, the support is installed in a cabin on the wind driven generator, and the detection pipeline 14 is fixedly installed on the support.
On the whole, the dynamic deformation detection system for the rotating shaft of the wind driven generator provided by the application detects the deformation amount of the rotating shaft in a non-contact optical measurement mode, can perform intensive and continuous data acquisition in the circumferential direction of the rotating shaft, and obtains a large amount of data through continuous detection.
Meanwhile, the non-contact measurement mode can also isolate the influence caused by vibration, noise and the like, so that the whole detection process can stably run.
Referring to fig. 6, as a specific embodiment of the dynamic deformation detection system provided by the application, the detection pipeline 14 includes a first arc-shaped half pipeline 141 and a second arc-shaped half pipeline 142 detachably connected to the first arc-shaped half pipeline 141, and the detection pipeline 14 with such a structure may be subsequently attached to a rotating shaft of a wind turbine, and is also convenient to be detached after the detection is completed.
Referring to fig. 1, as a specific embodiment of the dynamic deformation detection system provided by the application, a plurality of flexible sealing rings 13 are disposed at two ends of a flexible reflection pipe 11, and after the number of the flexible sealing rings 13 is increased, better sealing performance can be provided. Further, the adjacent flexible sealing rings 13 differ in height and/or thickness.
As a specific embodiment of the dynamic deformation detection system provided by the application, the driver 22 continuously operates during the image acquisition process, and the image sensor 24 intermittently acquires images, which can solve the synchronization problem between the driver 22 and the image sensor 24.
It should be understood that the driver 22 and the image sensor 24 are two independent components, and when the controller 6 issues the work orders at the same time, the start-up time of the driver 22 and the start-up time of the image sensor 24 may be different, which may cause the data collection to fail. The operation of the driver 22 during sampling is therefore adjusted to be continuous, so that the image sensor 24 can capture the light spot on the grating scale 23 during each image capture.
Referring to fig. 1 and fig. 3 to fig. 5, as a specific embodiment of the dynamic deformation detection system provided by the application, a detection cavity 143 is disposed on the detection pipeline 14, and the detection cavity 143 is communicated with an inner wall of the detection pipeline 14. The detection cavity 143 is used for installing the image sensor 24, and when the image sensor 24 is located in the detection cavity 143, the width of the gap between the inner wall of the detection pipe 14 and the flexible reflection pipe 11 can be properly reduced. After the gap width is reduced, the volume and weight of the inspection duct 14 can be reduced.
The grating ruler 23 can be installed in the detection cavity 143, and can also be installed on the inner wall of the detection pipeline 14.
Further, a plurality of image sensors 24 are provided in one detection chamber 143, and as shown in fig. 1, the image sensors 24 are disposed at intervals along the axis of the detection duct 14. When the number of the image sensors 24 is increased, the covering length of the rotating shaft in the axial direction can be increased, and more detection data can be obtained.
In some possible implementations, the plurality of image sensors 24 are integrated on a circuit board that is secured within the detection chamber 143 using screws.
When the number of image sensors 24 in one detection cavity 143 or a group of image sensors 24 is increased to multiple, a raster scale 23 (as shown in fig. 7) matched with the image sensors needs to be added with a demarcation indicator mark, the demarcation indicator mark has a function of determining a data acquisition range of each image sensor 24, and for the controller 6, data obtained by each image sensor 24 can be directly screened according to the demarcation indicator mark (a rectangular mark in fig. 7) on the image.
Assuming that there is deformation at the corresponding position of an optical fiber 21, the spot of the grating ruler 23 at the corresponding position will jump, and taking the horizontal axis as time and the vertical axis as the amount of jump, a curve can be obtained, as shown in fig. 8, and if there is no deformation, a straight line (the straight line coincides with the horizontal axis) is obtained, as shown in fig. 9.
The spot runout can be divided into axial runout and radial runout, both of which can be represented by the graphs in fig. 8 and 9.
Referring to fig. 10, the controller 6 may be a CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of programs described above. The controller 6 is mainly composed of a CPU601, a RAM602, a ROM603, a system bus 604, and the like, wherein the CPU601, the RAM602, and the ROM603 are connected to the system bus 604.
The driver 22 is connected to the system bus 604 via the control circuit 605, and the image sensor 24 is connected to the system bus 604 via the communication circuit 606.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a dynamic deformation detecting system of aerogenerator pivot which characterized in that includes:
the flexible reflection pipe (11) is provided with a light reflecting coating (12);
the flexible sealing rings (13) are arranged at two ends of the flexible reflecting tube (11);
the detection pipeline (14) is sleeved on the flexible reflection pipe (11), and a gap exists between the inner wall of the detection pipeline (14) and the outer wall of the flexible reflection pipe (11);
the optical fiber detection device comprises a plurality of groups of optical fibers (21) which are arranged on a detection pipeline (14), wherein the input ends of the optical fibers (21) are connected with a driver (22), and the output ends face a flexible reflection pipe (11);
the grating rulers (23) are arranged on the detection pipeline (14), and one grating ruler (23) corresponds to one group of optical fibers (21);
the image sensor (24) is arranged on the detection pipeline (14) and faces the grating ruler (23); and
the controller (6) is used for driving the driver (22) to work and generating a curve according to the image acquired by the image sensor (24);
wherein a part of the flexible sealing ring (13) is positioned in an annular groove in the detection pipeline (14); a set of optical fibers (21) are spaced along the axis of the test tube (14).
2. The dynamic deformation detection system of the wind driven generator rotating shaft according to claim 1, wherein the detection pipeline (14) comprises a first arc-shaped half pipeline (141) and a second arc-shaped half pipeline (142) detachably connected with the first arc-shaped half pipeline (141).
3. The dynamic deformation detection system of the wind driven generator rotating shaft according to claim 1, wherein a plurality of flexible sealing rings (13) are arranged at two ends of the flexible reflection pipe (11).
4. A system for detecting the dynamic deformation of a rotating shaft of a wind turbine according to claim 3, wherein the adjacent flexible sealing rings (13) have different heights and/or thicknesses.
5. The system for detecting the dynamic deformation of the rotating shaft of the wind driven generator as claimed in any one of claims 1 to 4, wherein the driver (22) is continuously operated during the process of acquiring the images, and the image sensor (24) intermittently acquires the images.
6. The dynamic deformation detection system of the wind driven generator rotating shaft according to claim 1, wherein a detection cavity (143) is arranged on the detection pipeline (14), and the detection cavity (143) is communicated with the inner wall of the detection pipeline (14);
the image sensor (24) is positioned in the detection cavity (143);
the grating ruler (23) is positioned in the detection cavity (143) or on the inner wall of the detection pipeline (14).
7. The dynamic deformation detection system of the wind driven generator rotating shaft according to claim 6, wherein a plurality of image sensors (24) are arranged in one detection cavity (143), and the image sensors (24) are arranged at intervals along the axis of the detection pipeline (14).
8. The dynamic deformation detection system of the wind driven generator rotating shaft according to claim 7, wherein a plurality of boundary indication marks are arranged on the grating ruler (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222977874.5U CN218002462U (en) | 2022-11-09 | 2022-11-09 | Dynamic deformation detection system of wind driven generator rotating shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222977874.5U CN218002462U (en) | 2022-11-09 | 2022-11-09 | Dynamic deformation detection system of wind driven generator rotating shaft |
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| CN218002462U true CN218002462U (en) | 2022-12-09 |
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| CN202222977874.5U Active CN218002462U (en) | 2022-11-09 | 2022-11-09 | Dynamic deformation detection system of wind driven generator rotating shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491004A (en) * | 2023-12-29 | 2024-02-02 | 三河市皓智精密机械制造有限公司 | High-precision spindle performance test method and system |
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- 2022-11-09 CN CN202222977874.5U patent/CN218002462U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491004A (en) * | 2023-12-29 | 2024-02-02 | 三河市皓智精密机械制造有限公司 | High-precision spindle performance test method and system |
| CN117491004B (en) * | 2023-12-29 | 2024-03-29 | 三河市皓智精密机械制造有限公司 | High-precision spindle performance test method and system |
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