CN111650278A - Ultrasonic detection device for main shaft cracks of direct-drive wind driven generator - Google Patents
Ultrasonic detection device for main shaft cracks of direct-drive wind driven generator Download PDFInfo
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- CN111650278A CN111650278A CN202010550430.6A CN202010550430A CN111650278A CN 111650278 A CN111650278 A CN 111650278A CN 202010550430 A CN202010550430 A CN 202010550430A CN 111650278 A CN111650278 A CN 111650278A
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- main shaft
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- driven generator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
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- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides a be used for direct drive formula aerogenerator main shaft crackle ultrasonic testing device which characterized in that: comprises more than 1 row of ultrasonic probes (1), and the ultrasonic probes (1) are arranged in a main shaft (2). According to the invention, the ultrasonic probe is arranged in the main shaft, the generated wave propagates to the interior of the main shaft, whether the main shaft cracks or not is analyzed according to the ultrasonic waveform, the crack growth condition of the stress concentration part of the main shaft is monitored in real time, and the main shaft fault can be discovered as soon as possible. The ultrasonic probes are designed to be arranged in a multi-row fan shape, so that the detection sensitivity can be improved. Therefore, the invention can perform ultrasonic detection aiming at the inner part with concentrated stress of the main shaft, and has better detection effect.
Description
Technical Field
The invention relates to the technical field of detection of a main shaft of a wind driven generator, in particular to an ultrasonic detection device for cracks of a main shaft of a direct-drive wind driven generator.
Background
The main shaft is a core component of the wind driven generator, as shown in fig. 3, directly bears the torque transmitted at the supporting hub, and is a first energy transmission carrier after the wind energy is converted into the mechanical energy. The main shaft is easy to crack and even break in the working process due to the complex stress action of bearing torque, axial thrust, pneumatic bending moment and the like. At present, the main shaft of the wind driven generator is detected, and an ultrasonic detector is usually arranged outside the main shaft.
Chinese patent 201610567980.2 discloses an ultrasonic testing method and a test block for in-service fan spindle cracks, which comprises a fan spindle between a shell of the fan spindle and a bearing of the fan spindle, a detection area, a flaw detection surface formed by a vertical extension line in the fan spindle and facing the inner side of the bearing of the fan spindle, and a plurality of ultrasonic probes arranged on the outer wall of the detection area, wherein the ultrasonic probes emit longitudinal waves to the flaw detection surface at an incident angle of 10-13 degrees. The ultrasonic testing test block for detecting the cracks of the main shaft of the in-service fan comprises a cylindrical test block body, artificial simulation cracks which are arranged at intervals are arranged on the circumferential surfaces of the outer walls of two sides of the test block body, and an artificial simulation groove with cracks are arranged between every two cracks. The method of the patent can carry out ultrasonic detection on the main shaft of the running fan, but the detection effect is not ideal enough.
Disclosure of Invention
The invention aims to provide an ultrasonic detection device for main shaft cracks of a direct-drive wind driven generator. The ultrasonic detection device is more reasonable in arrangement and better in detection effect.
The technical scheme of the invention is as follows: the ultrasonic detection device for the cracks of the main shaft of the direct-drive wind driven generator comprises more than 1 row of ultrasonic probes, and the ultrasonic probes are arranged in the main shaft.
According to the ultrasonic detection device for the main shaft cracks of the direct-drive wind driven generator, the ultrasonic probes are arranged in a fan shape, and the circular arc of the fan shape is concentric with the inner side of the main shaft.
In the ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator, the number of the ultrasonic probes is 2.
According to the ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator, the ultrasonic probe is installed on the fan-shaped installation plate.
According to the ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator, the ultrasonic probe is arranged at the position, close to the bearing, of the bottom of the main shaft.
According to the ultrasonic detection device for the main shaft cracks of the direct-drive wind driven generator, the fan-shaped mounting plate is connected with the support, the signal receiver is arranged on the support, and the ultrasonic probe is electrically connected with the signal receiver.
Compared with the prior art, the invention has the following beneficial effects: the applicant of the invention carries out long-term analysis and research on the generation mechanism and distribution of cracks of the main shaft of the wind driven generator, finds that the main shaft bears the stress such as torque, axial thrust, pneumatic bending moment and the like and is mostly concentrated at the inner side position of the bottom of the main shaft, and finds that the part is also the part which is most prone to crack generation through the overhaul and inspection of the damaged main shaft by the applicant, so that the existing design is that an ultrasonic detector is arranged outside the main shaft, ultrasonic waves are arranged from the outside to the inside, the side wall of the main shaft is usually thick, cracks in the main shaft are not easy to detect in the actual working state, and when the detection is carried out, larger cracks. Therefore, the ultrasonic probe is arranged in the main shaft, the generated wave propagates to the interior of the main shaft, whether the main shaft cracks or not is analyzed according to the ultrasonic waveform, the crack growth condition of the stress concentration part of the main shaft is monitored in real time, and the main shaft fault can be discovered as soon as possible. The ultrasonic probes are designed to be arranged in a multi-row fan shape, so that the detection sensitivity can be improved. Therefore, the invention can perform ultrasonic detection aiming at the inner part with concentrated stress of the main shaft, and has better detection effect.
Drawings
FIG. 1 is a schematic structural view of an ultrasonic probe and a sector mounting plate of the present invention;
FIG. 2 is a schematic view of the installation of the ultrasonic probe and the sector mounting plate of the present invention;
fig. 3 is a schematic view of the spindle of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention. The structures or processes not specifically mentioned are conventional in the art.
Example 1. The ultrasonic detection device for the cracks of the main shaft of the direct-drive wind driven generator comprises more than 1 row of ultrasonic probes 1, wherein the ultrasonic probes 1 are arranged in a main shaft 2.
The ultrasonic probes 1 are arranged in a fan shape, and the fan-shaped circular arc is concentric with the inner side of the main shaft.
The ultrasonic probes 1 are 2 rows, and may be 3 rows or more.
Ultrasonic probe 1 installs on fan-shaped mounting panel 3, designs the mounting hole on the fan-shaped mounting panel 3, inserts ultrasonic probe 1 in the mounting hole, makes things convenient for ultrasonic probe's location, does benefit to installation and change.
The ultrasonic probe 1 is arranged at the bottom of the main shaft 2 and close to the bearing.
The fan-shaped mounting plate 3 is connected with the support 4, the signal receiver 5 is arranged on the support 4, the ultrasonic probe 1 is electrically connected with the signal receiver 5, and the signal receiver 5 outputs signals to the detection host machine to be detected and analyzed through the detection system. The ultrasonic probe 1, the signal receiver 5 and the matched detection host can all adopt the existing equipment.
When the detection device is used, the detection device is arranged inside the main shaft 2 through the support 4 and the fixing part, the position is adjusted, the ultrasonic probe 1 on the fan-shaped mounting plate 3 is close to the bottom position of the bearing, and the working state of the main shaft is detected in real time by utilizing output signals of the ultrasonic probe 1 and the signal receiver 5.
Claims (6)
1. The utility model provides a be used for direct drive formula aerogenerator main shaft crackle ultrasonic testing device which characterized in that: comprises more than 1 row of ultrasonic probes (1), and the ultrasonic probes (1) are arranged in a main shaft (2).
2. The ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator according to claim 1, characterized in that: the ultrasonic probes (1) are arranged in a fan shape, and the fan-shaped circular arc is concentric with the inner side of the main shaft.
3. The ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator according to claim 2, characterized in that: the ultrasonic probes (1) are arranged in 2 rows.
4. The ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator according to claim 1, characterized in that: the ultrasonic probe (1) is arranged on the fan-shaped mounting plate (3).
5. The ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator according to claim 1, characterized in that: the ultrasonic probe (1) is arranged at the bottom of the main shaft (2) and close to the bearing.
6. The ultrasonic detection device for the main shaft crack of the direct-drive wind driven generator according to claim 5, characterized in that: fan-shaped mounting panel (3) linking bridge (4) are equipped with signal receiver (5) on support (4), and ultrasonic probe (1) is connected with signal receiver (5) electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550430.6A CN111650278A (en) | 2020-06-16 | 2020-06-16 | Ultrasonic detection device for main shaft cracks of direct-drive wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550430.6A CN111650278A (en) | 2020-06-16 | 2020-06-16 | Ultrasonic detection device for main shaft cracks of direct-drive wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111650278A true CN111650278A (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010550430.6A Pending CN111650278A (en) | 2020-06-16 | 2020-06-16 | Ultrasonic detection device for main shaft cracks of direct-drive wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111650278A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117929532A (en) * | 2024-03-21 | 2024-04-26 | 巴彦淖尔京能清洁能源电力有限公司 | Large-scale aerogenerator main shaft crack detection device based on ultrasonic wave |
| CN117949535A (en) * | 2024-03-27 | 2024-04-30 | 友铂空天动力(深圳)有限公司 | Ultrasonic detection device and method for fan spindle |
-
2020
- 2020-06-16 CN CN202010550430.6A patent/CN111650278A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117929532A (en) * | 2024-03-21 | 2024-04-26 | 巴彦淖尔京能清洁能源电力有限公司 | Large-scale aerogenerator main shaft crack detection device based on ultrasonic wave |
| CN117929532B (en) * | 2024-03-21 | 2024-06-07 | 巴彦淖尔京能清洁能源电力有限公司 | Large-scale aerogenerator main shaft crack detection device based on ultrasonic wave |
| CN117949535A (en) * | 2024-03-27 | 2024-04-30 | 友铂空天动力(深圳)有限公司 | Ultrasonic detection device and method for fan spindle |
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