CN202837254U - Reference block for ultrasonic flaw of large protection ring for rotor of generator in thermal power plant - Google Patents
Reference block for ultrasonic flaw of large protection ring for rotor of generator in thermal power plant Download PDFInfo
- Publication number
- CN202837254U CN202837254U CN 201220561474 CN201220561474U CN202837254U CN 202837254 U CN202837254 U CN 202837254U CN 201220561474 CN201220561474 CN 201220561474 CN 201220561474 U CN201220561474 U CN 201220561474U CN 202837254 U CN202837254 U CN 202837254U
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- Prior art keywords
- reference block
- detection
- protection ring
- power plant
- thermal power
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Abstract
The utility model discloses a reference block for ultrasonic flaw of a large protection ring for a rotor of a generator in a thermal power plant. The reference block (1) is in the shape of a ring, and the ring-shaped surface of the reference test block (1) is provided with four simulated cracks with different depths. The reference block (1) is made from same materials as those of the large protection ring. The reference block which is made from the same materials as those of the large protection ring and has artificially simulated defects is used to calibrate an instrument and make a DAC (Digital-to-Analog Converter) curve, and thus the problems of the judgment omission and the misjudgment on the protection ring are solved effectively. The reference block for ultrasonic detection can be used to draw the DAC curve and work out detection and acceptance criteria; and the reference block can be combined with a standard test block to calibrate flaw detection sensitivity, has a function equivalent to that of a weight of a scale, and can ensure the unification of the detection sensitivity and the detection and acceptance criteria during ultrasonic detection and so as to reduce the possibility of the judgment omission and the misjudgment in actual detection.
Description
Technical field
The utility model relates to a kind of reference block for the large retaining ring ultrasonic inspection of thermal power plant's generator amature, belongs to instrument calibration and Sensitivity determination apparatus.
Background technology
In existing retaining ring UT (Ultrasonic Testing), all adopt reference block to carry out to the calibration of defectoscope and the making of DAC curve, because the material of reference block and the difference of retaining ring material, when retaining ring is detected a flaw, reflection determination of equivalent to defective has difference, thereby causes failing to judge and judging by accident of defective.Concretely, because the material of retaining ring all is austenitic nonmagnetic steel, have anisotropic metal structure and coarse grains characteristics, bring difficulty to ultrasound examination.And the reference block of calibration defectoscope is done with 20 steels, because the difference of 20 steel and austenitic nonmagnetic steel causes failing to judge and judging by accident the retaining ring defective in the actual flaw detection.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of and can effectively solve the retaining ring defective, fail to judge and judge by accident, improve the reference block that is used for the large retaining ring ultrasonic inspection of thermal power plant's generator amature of instrument accuracy of detection, accuracy and sensitivity, can overcome the deficiencies in the prior art.
The technical solution of the utility model: be used for the reference block of the large retaining ring ultrasonic inspection of thermal power plant's generator amature, reference block be shaped as annular, be provided with the simulating crack of four different depths at reference block annulus inner face, it is identical that the making material of reference block and the thermal power plant large retaining ring of generator amature are made material.
The width of simulating crack is 0.1mm, and the degree of depth of four simulating cracks is respectively 0.5mm, 1.0mm, 1.5mm, 2.0mm.
Prior art relatively, the utility model uses and the making of instrument calibration and DAC curve is carried out in the large retaining ring of thermal power plant's generator amature material of the same race and retaining ring reference block with manual simulation's defective, can effectively solve the problem that the retaining ring defective is failed to judge and judged by accident like this.This ultrasound examination reference block is used for drawing the DAC curve, formulates the inspection and acceptance criterion; Can be combined with together to calibrate flaw detection sensitivity with reference block, its function is equivalent to the counterweight of balance, and the unification of detection sensitivity and inspection and acceptance criterion reduces failing to judge and judging by accident in the actual testing when guaranteeing ultrasound examination.
This test block is according to Retaining Ring on Generator Rotor ultrasonic inspection purpose system, so the detection waveform of its test block has stronger simulation, its detection effect is by dissecting actual measurement, it is errorless not only can to draw the detection defective locations, and the defect reflection equivalent error that records levels off to zero, and is well used in practice.The utlity model has simultaneously little, lightweight, the easy to carry advantage of test block volume, test block is difficult for slippage when being the annular taking and placing, has improved serviceable life and the operational security of test block.
Description of drawings
Figure of description
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment: the reference block of the large retaining ring ultrasonic inspection of thermal power plant's generator amature is identical with the large retaining ring making of thermal power plant's generator amature material as shown in Figure 1, namely adopt austenitic nonmagnetic steel, reference block 1 be shaped as annular or semicircle annular, Ring Width is 40mm, be provided with the simulating crack 2 of four different depths at reference block 1 annulus inner face, width between the simulating crack 2 is 30mm, the width of simulating crack 2 is 0.1mm, article four, simulating crack 2 indicates with A, B, C, D respectively, and its degree of depth is respectively 0.5mm, 1.0mm, 1.5mm, 2.0mm.
Claims (2)
1. reference block that is used for the large retaining ring ultrasonic inspection of thermal power plant's generator amature, it is characterized in that, reference block (1) be shaped as annular, be provided with the simulating crack (2) of four different depths at reference block (1) annulus inner face, it is identical that the making material of reference block (1) and the thermal power plant large retaining ring of generator amature are made material.
2. the reference block for the large retaining ring ultrasonic inspection of thermal power plant's generator amature according to claim 1, it is characterized in that: the width of simulating crack (2) is 0.1mm, and the degree of depth of four simulating cracks (2) is respectively 0.5mm, 1.0mm, 1.5mm, 2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220561474 CN202837254U (en) | 2012-10-30 | 2012-10-30 | Reference block for ultrasonic flaw of large protection ring for rotor of generator in thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220561474 CN202837254U (en) | 2012-10-30 | 2012-10-30 | Reference block for ultrasonic flaw of large protection ring for rotor of generator in thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837254U true CN202837254U (en) | 2013-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220561474 Expired - Fee Related CN202837254U (en) | 2012-10-30 | 2012-10-30 | Reference block for ultrasonic flaw of large protection ring for rotor of generator in thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837254U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196997A (en) * | 2013-04-10 | 2013-07-10 | 吉林省电力有限公司电力科学研究院 | Ultrasonic crack detection method for rotor shaft seal part of steam turbine |
| CN104483383A (en) * | 2014-12-05 | 2015-04-01 | 长春航空液压控制有限公司 | Ultrasonic detection method of plunger spring |
| CN113686961A (en) * | 2021-08-17 | 2021-11-23 | 武汉理工大学 | Curved surface part ultrasonic full-focusing defect quantitative detection method and system |
-
2012
- 2012-10-30 CN CN 201220561474 patent/CN202837254U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196997A (en) * | 2013-04-10 | 2013-07-10 | 吉林省电力有限公司电力科学研究院 | Ultrasonic crack detection method for rotor shaft seal part of steam turbine |
| CN104483383A (en) * | 2014-12-05 | 2015-04-01 | 长春航空液压控制有限公司 | Ultrasonic detection method of plunger spring |
| CN113686961A (en) * | 2021-08-17 | 2021-11-23 | 武汉理工大学 | Curved surface part ultrasonic full-focusing defect quantitative detection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |