CN105388209A - High-sensitivity fluorescent magnetic particle examination equipment for turbine blades - Google Patents
High-sensitivity fluorescent magnetic particle examination equipment for turbine blades Download PDFInfo
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- CN105388209A CN105388209A CN201510968013.2A CN201510968013A CN105388209A CN 105388209 A CN105388209 A CN 105388209A CN 201510968013 A CN201510968013 A CN 201510968013A CN 105388209 A CN105388209 A CN 105388209A
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- flaw detection
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- magnetic particle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
Abstract
The invention relates to the technical field of non-destructive testing of steam turbine equipment for a nuclear power station, in particular to high-sensitivity fluorescent magnetic particle examination equipment for turbine blades. The aim of designing the high-sensitivity fluorescent magnetic particle examination equipment for last three levels of blades of a low pressure rotor of a turbine is achieved. The blades of different types and dimensions can be placed on a detecting platform, the position of the blade detecting platform can be adjusted up and down and left and right through electric control, and fine cracks on the blades of the low-pressure rotor of the turbine can be effectively detected. The high-sensitivity fluorescent magnetic particle examination equipment is characterized by comprising a magnetic suspension spraying pipe, a coil cylinder, the detecting platform, a guide rail, a magnetic suspension recovery container, a centrifugal pump, a moving control button, a fan, a magnetizing coil, a pedal switch, a wheel and a main frame. A detected component can be moved left and right and up and down through electric control, the process of manually carrying or moving the thick blades is omitted, and the proportion of manpower resources is lowered.
Description
Technical field
The present invention relates to steam turbine for nuclear power station equipment technical field of nondestructive testing, be specifically related to a kind of turbine blade high sensitivity Fluorescent magnetic particle inspection equipment.
Background technology
During certain nuclear power plant's unit operation, all there is fracture accident in blade root and leaf top stellite alloy film embedding groove (abbreviation alloy groove) the relief groove position of nuclear steam turbine (NuclearMainTurbine, NMT) low pressure rotor second last stage blade.Finding the examination and analysb of other blades of the same type, there is grade blind crack in blade root first teeth portion position and the alloy groove relief groove position of part final stage and second last stage blade.Materials failure analysis is carried out to above-mentioned two class blade cracks, find that the basic material of blade high cycle fatigue crack initiation at alloy groove relief groove position is in soldering interface, blade root first teeth portion position cracks is that partial blade exists k9 second-order resonance, and blade root participates in vibration and causes the initiation and propogation of high cycle fatigue crackle until fracture.
At present, liquid penetration test (being called for short PT inspection) PT inspection and ultrasonic surface wave inspection (being called for short UT inspection) are the main nondestructiving detecting means of turbine blade.When high cycle fatigue crackle is in the germinating stage, adopt existing PT inspection technology in time, effectively can not detect the blind crack on blade surface opening or nearly surface.Ultrasonic surface wave is propagated on blade blade surface, propagate the degree of depth generally within 0.5 times of wavelength coverage, therefore detect the degree of depth and be no more than 0.5 times of wavelength, and blade blade curvature can cause surface wave deep fades, the blind crack on blade surface opening or nearly surface therefore in time, effectively can not be detected.
Fluorescent magnetic particle inspection (being called for short MT inspection) detects one of ferrimagnet surface opening or the effective non-destructive method of near surface flaw.Due to turbine blade complex structure, surface curvature is comparatively large, and belong to typical shaped piece, the detection sensitivity of existing Fluorescent magnetic particle inspection technology and equipment does not reach testing requirement.
Summary of the invention
The object of the invention is for Low Pressure Steam Turbine end three grade blades, design a kind of high sensitivity Fluorescent magnetic particle inspection equipment, its detection platform can place the blade of dissimilar size, and, left and right adjustment crop leaf measuring position of platform upper and lower by Electronic control, realize effectively detecting Low Pressure Steam Turbine blade blind crack, prevent the generation of turbine blade fracture accident.
The present invention is achieved in that
A kind of turbine blade high sensitivity Fluorescent magnetic particle inspection equipment, is characterized in that: it comprises magnetic flaw detection ink shower, coil cylinder body, detection platform, guide rail, magnetic flaw detection ink returnable, centrifugal pump, mobile control knob, fan, magnetizing coil, foot pedal, wheel and main body frame;
Main body frame entirety is the cuboid of hollow, and the upper surface of left part has diversion trench; Magnetic flaw detection ink returnable and centrifugal pump are arranged on the inside of main body frame, and magnetic flaw detection ink returnable is connected with diversion trench; Magnetic flaw detection ink returnable and centrifugal pump are provided with sheet metal; Have through hole on a metal plate, connecting duct, through this through hole, is communicated with receptacle and centrifugal pump entrance; Suspension shower lower end is connected with centrifugal delivery side of pump, and the ejiction opening of upper end aims at detected parts; Coil cylinder body entirety is the cuboid of hollow, and lower end is fixed on the upper surface of main body frame left part; Magnetizing coil is fixed on the inside of coil cylinder body; Guide rail is fixed on the upper surface of main body frame; Detection platform is moveable dolly, is placed on guide rail, along guide rail side-to-side movement; Mobile control knob is fixed on the outer face of main body frame, is connected with detection platform by cable; Fan is arranged on the top of coil cylinder body; Magnetizing coil is connected with external power supply by foot pedal; Wheel is fixed on the lower end of main body frame.
The scope of the magnetisablilty of magnetizing coil as above is 8000 ampere-turn to 9000 ampere-turns.
Magnetic flaw detection ink shower as above, coil cylinder body, guide rail, magnetic flaw detection ink returnable, fan, foot pedal and main body frame all adopt aluminum alloy materials to make.
The invention has the beneficial effects as follows:
The present invention includes magnetic flaw detection ink shower, coil cylinder body, detection platform, guide rail, magnetic flaw detection ink returnable, centrifugal pump, mobile control knob, fan, magnetizing coil, foot pedal and wheel.The Fluorescent magnetic particle inspection equipment inspection sensitivity that the present invention describes reaches A1-15/100 (artificial slot width 60 ~ 100 μ, the degree of depth 15 ± 2 μ), A1-30/100 (artificial slot width 60-100 μ is met higher than JB/T9628-1999 " turbine blade magnetic powder inspection method " medium sensitivity, the degree of depth 30 ± 4 μ) requirement, effectively can find the blind crack of blade.The present invention can be realized left and right, be moved up and down tested parts by Electronic control, eliminates the process of manpower transport or mobile massive blades, reduces human resources accounting.By design cooling fan, can dispel the heat to magnetizing coil, lower the temperature, effectively extend the working time of inspection machine.This inspection machine effectively increases work efficiency about 50%, and this method of inspection many successes runs application in nuclear power plant's maintenance at center, respond well.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of turbine blade high sensitivity Fluorescent magnetic particle inspection equipment of the present invention;
Fig. 2 is the left view of a kind of turbine blade high sensitivity Fluorescent magnetic particle inspection equipment of the present invention.
Wherein: 1. magnetic flaw detection ink shower, 2. coil cylinder body, 3. detection platform, 4. guide rail, 5. magnetic flaw detection ink returnable, 6. centrifugal pump, 7. move control knob, 8. fan, 9. magnetizing coil, 10. foot pedal, 11. wheels, 12. main body frames.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
As depicted in figs. 1 and 2, a kind of turbine blade high sensitivity Fluorescent magnetic particle inspection equipment, comprises magnetic flaw detection ink shower 1, coil cylinder body 2, detection platform 3, guide rail 4, magnetic flaw detection ink returnable 5, centrifugal pump 6, mobile control knob 7, fan 8, magnetizing coil 9, foot pedal 10, wheel 11 and main body frame 12.
Main body frame 12 entirety is the cuboid of hollow, and the upper surface of left part has diversion trench.Magnetic flaw detection ink returnable 5 and centrifugal pump 6 are arranged on the inside of main body frame 12, and magnetic flaw detection ink returnable 5 is connected with diversion trench.Magnetic flaw detection ink returnable 5 and centrifugal pump 6 are provided with sheet metal, play buffer action.Have through hole on a metal plate, connecting duct, through this through hole, is communicated with receptacle 5 and centrifugal pump 6 entrance, and connecting duct is used for the magnetic flaw detection ink in returnable 5 to be directed into centrifugal pump 6.Suspension shower 1 lower end is connected with the outlet of centrifugal pump 6, and the ejiction opening of upper end aims at detected parts.Coil cylinder body 2 entirety is the cuboid of hollow, and lower end is fixed on the upper surface of main body frame 12 left part.Magnetizing coil 9 is fixed on the inside of coil cylinder body 2, and magnetizing coil 9 is for magnetizing detected parts.Guide rail 4 is fixed on the upper surface of main body frame 12.Detection platform 3 is moveable dolly, is placed on guide rail 4, along guide rail 4 side-to-side movement.Mobile control knob 7 is fixed on the outer face of main body frame 12, is connected with detection platform 3 by cable, controls the motion of detection platform 3.Fan 8 is arranged on the top of coil cylinder body 2, for dispelling the heat to coil cylinder body 2 and magnetizing coil 9.Magnetizing coil 9 is connected with external power supply by foot pedal 10, and foot pedal 10 is for controlling path and the open circuit of magnetizing coil 9 and external power supply.Wheel 11 is fixed on the lower end of main body frame 12, for realizing the movement of whole equipment.
In the present embodiment, the scope of the magnetisablilty of magnetizing coil 9 is 8000 ampere-turn to 9000 ampere-turns.
Magnetic flaw detection ink shower 1, coil cylinder body 2, guide rail 4, magnetic flaw detection ink returnable 5, fan 8, foot pedal 10 and main body frame 12 all adopt aluminum alloy materials to make.
Detection platform 3 and mobile control knob 7 are set of equipments, are commercially available.
Before blade implements Fluorescent magnetic particle inspection, by boom hoisting, steam turbine rotor vane is placed in detection platform 3, move about 7 by control knob, the position of left and right adjusting detection platform dolly 3, make blade be in magnetic field intensity highest point in magnetizing coil 9, and complete the magnetization of full blade.Then come into effect blade Fluorescent magnetic particle inspection, start fan 8 simultaneously and dispel the heat to magnetizing coil 9, lower the temperature, extend inspection machine stream time.And use magnetic flaw detection ink shower 1 to spray magnetic flaw detection ink to soak blade surface, step on magnetization foot pedal 10, energising 1s ~ 5s, galvanization keeps spraying magnetic flaw detection ink, stop applying magnetic flaw detection ink at least after 2s, energising is stopped again when blade surface magnetic trace is formed and is detained to get off, under black lamp, carry out blade surface magnetic trace observe, complete after to magnetic trace size and position record, recycling magnetizing coil 9 oppositely demagnetizes to verified blade, blade surface remanent magnetism is no more than 240A/m, finally carries out rear cleaning to the blade surface after demagnetization.
Detection platform 3 of the present invention makes blade be in magnetic field intensity highest point in magnetizing coil, and conveniently completes the magnetization of the full blade of blade, improves crop leaf measuring sensitivity, manpower in testing process can be avoided repeatedly to carry or mobile massive blades simultaneously.Fan 8 is positioned over above magnetizing coil 9, because blade Fluorescent magnetic particle inspection belongs to uninterrupted operation in 24 hours in center operating maintenance, magnetizing coil 9 can produce a large amount of heats, coil temperature can be reduced by the thermolysis of fan, the working time of inspection machine can be extended, promote inspection work efficiency.Centrifugal pump 6 magnetic flaw detection ink returnable 5 implements magnetic flaw detection ink automatic spraying, and unnecessary magnetic flaw detection ink can enter magnetic flaw detection ink returnable 5 along the diversion trench in detection platform, and then realizes recycling of magnetic flaw detection ink, saves the use of laboratory consumables.
Claims (3)
1. a turbine blade high sensitivity Fluorescent magnetic particle inspection equipment, is characterized in that: it comprises magnetic flaw detection ink shower (1), coil cylinder body (2), detection platform (3), guide rail (4), magnetic flaw detection ink returnable (5), centrifugal pump (6), mobile control knob (7), fan (8), magnetizing coil (9), foot pedal (10), wheel (11) and main body frame (12);
Main body frame (12) entirety is the cuboid of hollow, and the upper surface of left part has diversion trench; Magnetic flaw detection ink returnable (5) and centrifugal pump (6) are arranged on the inside of main body frame (12), and magnetic flaw detection ink returnable (5) is connected with diversion trench; Magnetic flaw detection ink returnable (5) and centrifugal pump (6) are provided with sheet metal; Have through hole on a metal plate, connecting duct, through this through hole, is communicated with receptacle (5) and centrifugal pump (6) entrance; Suspension shower (1) lower end is connected with the outlet of centrifugal pump (6), and the ejiction opening of upper end aims at detected parts; Coil cylinder body (2) entirety is the cuboid of hollow, and lower end is fixed on the upper surface of main body frame (12) left part; Magnetizing coil (9) is fixed on the inside of coil cylinder body (2); Guide rail (4) is fixed on the upper surface of main body frame (12); Detection platform (3) is moveable dolly, is placed on guide rail (4), along guide rail (4) side-to-side movement; Mobile control knob (7) is fixed on the outer face of main body frame (12), is connected with detection platform (3) by cable; Fan (8) is arranged on the top of coil cylinder body (2); Magnetizing coil (9) is connected with external power supply by foot pedal (10); Wheel (11) is fixed on the lower end of main body frame (12).
2. turbine blade high sensitivity Fluorescent magnetic particle inspection equipment according to claim 1, is characterized in that: the scope of the magnetisablilty of described magnetizing coil (9) is 8000 ampere-turn to 9000 ampere-turns.
3. turbine blade high sensitivity Fluorescent magnetic particle inspection equipment according to claim 1, is characterized in that: described magnetic flaw detection ink shower (1), coil cylinder body (2), guide rail (4), magnetic flaw detection ink returnable (5), fan (8), foot pedal (10) and main body frame (12) all adopt aluminum alloy materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968013.2A CN105388209A (en) | 2015-12-21 | 2015-12-21 | High-sensitivity fluorescent magnetic particle examination equipment for turbine blades |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968013.2A CN105388209A (en) | 2015-12-21 | 2015-12-21 | High-sensitivity fluorescent magnetic particle examination equipment for turbine blades |
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| CN105388209A true CN105388209A (en) | 2016-03-09 |
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| CN201510968013.2A Pending CN105388209A (en) | 2015-12-21 | 2015-12-21 | High-sensitivity fluorescent magnetic particle examination equipment for turbine blades |
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Citations (7)
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| CN201083697Y (en) * | 2007-06-21 | 2008-07-09 | 上海宇光无损检测设备制造有限公司 | Non-contact type round steel on-line fluorescence magnetic particle flaw detection equipment |
| JP2008309603A (en) * | 2007-06-14 | 2008-12-25 | Ihi Corp | Fluorescent flaw detection method and its device |
| US20110169485A1 (en) * | 2010-01-08 | 2011-07-14 | General Electric Company | Magnetic particle inspection apparatus and method |
| CN203422348U (en) * | 2013-09-04 | 2014-02-05 | 江苏纽克光谱科技有限公司 | Magnetic powder inspection machine |
| CN203551510U (en) * | 2013-10-16 | 2014-04-16 | 成都发动机（集团）有限公司 | Magnetic particle testing equipment for aero-engine blade |
| CN105158327A (en) * | 2015-09-23 | 2015-12-16 | 安东检测有限公司 | Magnetic powder inspection device |
| CN205352999U (en) * | 2015-12-21 | 2016-06-29 | 中核核电运行管理有限公司 | Turbine blade high sensitivity fluorescent magnetic powder inspection machine |
-
2015
- 2015-12-21 CN CN201510968013.2A patent/CN105388209A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008309603A (en) * | 2007-06-14 | 2008-12-25 | Ihi Corp | Fluorescent flaw detection method and its device |
| CN201083697Y (en) * | 2007-06-21 | 2008-07-09 | 上海宇光无损检测设备制造有限公司 | Non-contact type round steel on-line fluorescence magnetic particle flaw detection equipment |
| US20110169485A1 (en) * | 2010-01-08 | 2011-07-14 | General Electric Company | Magnetic particle inspection apparatus and method |
| CN203422348U (en) * | 2013-09-04 | 2014-02-05 | 江苏纽克光谱科技有限公司 | Magnetic powder inspection machine |
| CN203551510U (en) * | 2013-10-16 | 2014-04-16 | 成都发动机（集团）有限公司 | Magnetic particle testing equipment for aero-engine blade |
| CN105158327A (en) * | 2015-09-23 | 2015-12-16 | 安东检测有限公司 | Magnetic powder inspection device |
| CN205352999U (en) * | 2015-12-21 | 2016-06-29 | 中核核电运行管理有限公司 | Turbine blade high sensitivity fluorescent magnetic powder inspection machine |
Non-Patent Citations (1)
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| 付千发 等: "核电厂汽轮机转子叶片的荧光磁粉检测", 《无损检测》 * |
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Application publication date: 20160309 |
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