CN104198571A - Method for detecting crack on surface of worm gear combined pivotal bearing - Google Patents
Method for detecting crack on surface of worm gear combined pivotal bearing Download PDFInfo
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- CN104198571A CN104198571A CN201410494196.4A CN201410494196A CN104198571A CN 104198571 A CN104198571 A CN 104198571A CN 201410494196 A CN201410494196 A CN 201410494196A CN 104198571 A CN104198571 A CN 104198571A
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Abstract
The invention relates to a method for detecting cracks on the surface of a worm gear combined pivotal bearing. The method comprises the following steps: mounting a crack detection sensor on the surface of the worm gear combined pivotal bearing, wherein the crack detection sensor mainly consists of two parts, namely, a conductive coating layer and an insulating layer; supplying constant current into the crack detection sensor, alarming when the constant current passes through the crack detection sensor and a certain electric field is generated inside the crack detection sensor, subsequently establishing a finite element model of the crack detection sensor, and analyzing the potential difference of the electric field of the crack detection sensor and different monitoring points by using the model. The method has the advantages that as the stable electric field can be generated when the constant current passes through the crack detection sensor, and as damage can also be caused, cracks can be generated on a membrane layer of the crack detection sensor, the electric field can be changed, output signals of the crack detection sensor are also different, and the positions and the lengths of the cracks can be finally confirmed by simulating signals input from the crack detection sensor by using simulation software.
Description
Technical field
The present invention relates to a kind of detection method, especially a kind of worm-gear toothing combination swing bearing surface crack testing method.
Background technology
Along with social development, we can see swing bearing use in daily life in the place of mentioning at the surrounding of life, along with swing bearing use increasingly extensive, the safety problem that it brings causes people's concern day by day, and the method for various detection Metal Crack is invented and widespread use by people.
In daily life or production, turbine gear combination swing bearing is due to long-term use, there will be stress crackle, but these crackles are often more small, naked eyes indistinguishable, thus must adopt professional testing tool to find, but conventional instrument uses cumbersome and can not determine position and the length of crackle, therefore, just must develop a kind of detection method that can accurately judge crack position and length, through retrieval, not find and the same or analogous method of the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of detection method that can accurately judge crack position and length.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of worm-gear toothing combination swing bearing surface crack testing method, its innovative point is: comprise the steps:
A) by crack detection installation of sensors on turbine gear combination swing bearing surface, this crack detection sensor is mainly made up of conductive cladding and insulation course two parts;
B) give crack detection sensor input steady current, when steady current is during from crack detection sensor, will produce certain electric field at crack detection sensor internal, in the time that crackle appears in turbine gear combination swing bearing surface, crack detection sensor rete is also to occur crackle, and crack detection sensor output signal will fluctuate, thereby report to the police, in the time of the flawless of turbine gear combination swing bearing surface, crack detection sensor output signal is stable, does not report to the police;
C) report to the police after by setting up the finite element model of crack detection sensor, use the potential difference (PD) between electric field and each monitoring point of this model analysis crack detection sensor, by crackle detecting sensor is carried out to simulation analysis, obtain the variation characteristic that radially monolateral, the bilateral expansion of crackle is potential difference (PD) between each monitoring point and determine the position of crackle and the length of crackle.
The invention has the advantages that: the inventive method steady current can produce stable electric field by crack detection sensor, as there is crackle in turbine gear combination swing bearing surface, due to subsidiary damage, crack detection sensor rete also there will be crackle, its electric field also can change, different its differences that affect on electric field of the position difference of crackle, length, thereby the output signal of crack detection sensor is also different, finally, by the signal of simulation software simulating crack detecting sensor input, finally determine position and the length of crackle.
Brief description of the drawings
The workflow diagram of Fig. 1 worm-gear toothing combination of the present invention swing bearing surface crack testing method.
The crack detection installation of sensors position view of Fig. 2 worm-gear toothing combination of the present invention swing bearing surface crack testing method.
Embodiment
A kind of worm-gear toothing combination swing bearing surface crack testing method as shown in Figure 1, comprises the steps:
A) crack detection sensor 2 is arranged on to turbine gear combination swing bearing 1 surface above, this crack detection sensor 2 is mainly made up of conductive cladding and insulation course two parts;
B) input steady current to crack detection sensor 2, when steady current is during from crack detection sensor 2, will be at the certain electric field of the inner generation of crack detection sensor 2, in the time that crackle appears in turbine gear combination swing bearing 1 surface, crack detection sensor 2 retes are also to occur crackle, and crack detection sensor 2 output signals will fluctuate, thereby report to the police, in the time of turbine gear combination swing bearing 1 surperficial flawless, crack detection sensor 2 stable output signal, do not report to the police;
C) report to the police after by setting up the finite element model of crack detection sensor 2, use the potential difference (PD) between electric field and each monitoring point of this model analysis crack detection sensor 2, by crackle detecting sensor 2 is carried out to simulation analysis, obtain the variation characteristic that radially monolateral, the bilateral expansion of crackle is potential difference (PD) between each monitoring point and determine the position of crackle and the length of crackle.
Adopt the turbine gear combination swing bearing of the different size of the method in real work to test, according to content of the present invention, 1000 different turbine gear combination swing bearings are detected, the turbine gear combination swing bearing that has crackle is carried out to mark record, then contrast by microscopic examination and with testing result, accuracy rate is up to 99.99%, so the inventive method is reliable.
Its principle of work is: the inventive method steady current can produce stable electric field by crack detection sensor 2, as there is crackle in turbine gear combination swing bearing 1 surface, due to subsidiary damage, crack detection sensor 2 retes also there will be crackle, its electric field also can change, different its differences that affect on electric field of the position difference of crackle, length, thereby the output signal of crack detection sensor is also different, the signal of finally inputting by simulation software simulating crack detecting sensor 2, finally position and the length of definite crackle.
Claims (1)
1. a worm-gear toothing combination swing bearing surface crack testing method, is characterized in that: comprise the steps:
A) by crack detection installation of sensors on turbine gear combination swing bearing surface, this crack detection sensor is mainly made up of conductive cladding and insulation course two parts;
B) give crack detection sensor input steady current, when steady current is during from crack detection sensor, will produce certain electric field at crack detection sensor internal, in the time that crackle appears in turbine gear combination swing bearing surface, crack detection sensor rete is also to occur crackle, and crack detection sensor output signal will fluctuate, thereby report to the police, in the time of the flawless of turbine gear combination swing bearing surface, crack detection sensor output signal is stable, does not report to the police;
C) report to the police after by setting up the finite element model of crack detection sensor, use the potential difference (PD) between electric field and each monitoring point of this model analysis crack detection sensor, by crackle detecting sensor is carried out to simulation analysis, obtain the variation characteristic that radially monolateral, the bilateral expansion of crackle is potential difference (PD) between each monitoring point and determine the position of crackle and the length of crackle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494196.4A CN104198571A (en) | 2014-09-24 | 2014-09-24 | Method for detecting crack on surface of worm gear combined pivotal bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494196.4A CN104198571A (en) | 2014-09-24 | 2014-09-24 | Method for detecting crack on surface of worm gear combined pivotal bearing |
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| Publication Number | Publication Date |
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| CN104198571A true CN104198571A (en) | 2014-12-10 |
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| CN201410494196.4A Pending CN104198571A (en) | 2014-09-24 | 2014-09-24 | Method for detecting crack on surface of worm gear combined pivotal bearing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820756A (en) * | 2015-05-18 | 2015-08-05 | 东北大学 | Kinetic parameter determination method of extended tooth contact considered crack gear rotor system |
| CN107976210A (en) * | 2017-11-10 | 2018-05-01 | 长春长光精密仪器集团有限公司 | A kind of method and device for detecting bearing installation |
| CN110596194A (en) * | 2019-08-09 | 2019-12-20 | 南京因泰莱电器股份有限公司 | Crack detection method for polysilicon rod |
| CN112505136A (en) * | 2020-11-27 | 2021-03-16 | 陕西工业职业技术学院 | Curved surface detection device based on magnetic memory and detection method thereof |
| CN114264700A (en) * | 2021-12-23 | 2022-04-01 | 东华大学 | Flexible gear crack monitoring device and method |
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| CN102520052A (en) * | 2011-12-07 | 2012-06-27 | 南京航空航天大学 | Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method |
| CN102955088A (en) * | 2012-11-15 | 2013-03-06 | 云南电力试验研究院（集团）有限公司电力研究院 | Zero resistance insulator detection method on basis of finite element database |
| CN103344694A (en) * | 2013-07-09 | 2013-10-09 | 华北电力大学 | Method for detecting crack defect of in-service strut porcelain insulator |
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2014
- 2014-09-24 CN CN201410494196.4A patent/CN104198571A/en active Pending
Patent Citations (5)
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| CN1975404A (en) * | 2005-11-30 | 2007-06-06 | 三星电子株式会社 | Apparatus and method of detecting defective substrate |
| CN102053115A (en) * | 2010-12-06 | 2011-05-11 | 河海大学 | Device and method for detecting defect of composite material |
| CN102520052A (en) * | 2011-12-07 | 2012-06-27 | 南京航空航天大学 | Electrostatic induction based metal surface contact damage on-line monitoring system and monitoring method |
| CN102955088A (en) * | 2012-11-15 | 2013-03-06 | 云南电力试验研究院（集团）有限公司电力研究院 | Zero resistance insulator detection method on basis of finite element database |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820756A (en) * | 2015-05-18 | 2015-08-05 | 东北大学 | Kinetic parameter determination method of extended tooth contact considered crack gear rotor system |
| CN104820756B (en) * | 2015-05-18 | 2017-12-05 | 东北大学 | A kind of Gear with Crack Parameters of Rotor System for considering to extend engagement determines method |
| CN107976210A (en) * | 2017-11-10 | 2018-05-01 | 长春长光精密仪器集团有限公司 | A kind of method and device for detecting bearing installation |
| CN107976210B (en) * | 2017-11-10 | 2020-06-12 | 长春长光精密仪器集团有限公司 | Method and device for detecting bearing installation |
| CN110596194A (en) * | 2019-08-09 | 2019-12-20 | 南京因泰莱电器股份有限公司 | Crack detection method for polysilicon rod |
| CN112505136A (en) * | 2020-11-27 | 2021-03-16 | 陕西工业职业技术学院 | Curved surface detection device based on magnetic memory and detection method thereof |
| CN112505136B (en) * | 2020-11-27 | 2023-06-30 | 陕西工业职业技术学院 | Curved surface detection device based on magnetic memory and detection method thereof |
| CN114264700A (en) * | 2021-12-23 | 2022-04-01 | 东华大学 | Flexible gear crack monitoring device and method |
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Application publication date: 20141210 |