CN103954350A - High temperature resisting non-contact blade vibration testing sensor - Google Patents
High temperature resisting non-contact blade vibration testing sensor Download PDFInfo
- Publication number
- CN103954350A CN103954350A CN201410164745.1A CN201410164745A CN103954350A CN 103954350 A CN103954350 A CN 103954350A CN 201410164745 A CN201410164745 A CN 201410164745A CN 103954350 A CN103954350 A CN 103954350A
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- Prior art keywords
- high temperature
- blade vibration
- temperature resistant
- measuring sensor
- platinum
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- 238000012360 testing method Methods 0.000 title abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical group [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims abstract description 14
- 230000008054 signal transmission Effects 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 20
- 239000000919 ceramic Substances 0.000 claims description 19
- 229910000629 Rh alloy Inorganic materials 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000521 B alloy Inorganic materials 0.000 claims description 2
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 abstract 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 6
- 239000011224 oxide ceramic Substances 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a high temperature resisting non-contact blade vibration testing sensor. The high temperature resisting non-contact blade vibration testing sensor comprises a monitoring probe and signal transmission guide wires connected with the monitoring probe, and the monitoring probe is composed of a platinum rhodium core electrode and 95 percent of aluminum oxide ceramic materials. The 95 percent of the aluminum oxide ceramic materials are adopted as a middle insulation layer in a sintering molding mode, the surface of aluminum oxide ceramics is metalized, the aluminum oxide ceramics and a platinum rhodium piece on the outer layer are sealed in a welded mode, and a sealed body is formed. The sensor is good in integrity, connecting reliability and device firmness, the thermal expansion coefficient of selected platinum rhodium is close to that of the selected 95 percent of aluminum oxide ceramics, and therefore the platinum rhodium and the aluminum oxide ceramics can be closely combined at high temperature, high temperature and oxidization are resisted, and the monitoring requirement can be met. The unit area power of a heating element is controlled within a reasonable range, the performance is stable, and the service life of the heating element is greatly prolonged. Three coaxial cable signal transmission guide wires are high in mechanical strength, long in service life, and resistant to high temperature and irradiation and have the signal shielding capacity.
Description
Technical field
The present invention relates to a kind of vibration-measuring sensor, relate in particular to a kind of high temperature resistant contactless blade vibration-measuring sensor.
Background technology
Vibration measuring technology is the new type edge subject growing up the 1970s and 1980s at twentieth century, in recent years to being tending towards ripe the development day of this technology.In rotating machinery detects, vibration-testing and analysis are most widely used, are also the basic skills that applying frequency is the highest.By the oscillation phenomenon that just plant equipment in operational process produces is monitored, by the characteristic of vibration signal transmission, come the characteristic parameter of analytical equipment and the fault of judgment device whether to exist.
In measuring the practice process of monitoring, the topmost shortcoming of contact type measurement is can only measure limited blade at one time.Because the number of active lanes of current collector is limited, add the complicacy of testing equipment work, all blades that electric resistance strain film method is observed in same one-level are simultaneously impossible, in addition owing to being subject to the impact of objective factor, impact as paster, wire firm pasting degree, is difficult to accomplish long term monitoring; Contact also can convection cell flow, the quality of blade, rigidity, damping etc. have impact.Therefore there is the shortcoming that is difficult to overcome in contact measuring method, and for example the disclosed a kind of portable vibration detecting device of patent 201120408300.5, comprises and be arranged near the sensor of tested vibrating mass, for gathering vibration signal.And noncontact measuring method is because it is simple in structure, it is convenient to install, monitoring range is wide, do not affect the advantages such as air current flow and blade frequencies and damping simultaneously, day by day become the developing direction of China's blade vibration monitoring technology, in High Rotation Speed vibration survey, show wide application prospect.
Summary of the invention
The object of the present invention is to provide a kind of high temperature resistant contactless blade vibration-measuring sensor, the reliability of its globality, connection, the fastness of device are good, and high temperature resistant, anti-oxidant, can reach monitoring requirement, and monitoring range is wide, easy for installation.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of high temperature resistant contactless blade vibration-measuring sensor, comprise monitoring probe and the signal transmission wire being attached thereto, monitoring probe is made (Al by the platinum-rhodium alloy core utmost point and 95% alumina ceramic material
2o
3content be 95%); Wherein, 95% alumina ceramic material is through sinter molding as intermediate insulating layer, and metallizing in 95% aluminium oxide ceramics surface, carries out welded seal with outer field platinum-rhodium alloy part, forms a seal.
As further preferred, described signal transmission wire is usingd nickel cobalt (alloy) 4J34 B alloy wire and is transmitted heart yearn as signal, the MgO of high purity micro mist that selection granularity is not more than 5um is as insulator packed layer, 825 alloy materials are as sheath, a kind of novel triaxial cable forming by assembling, annealing, drawing undergauge, has good shielding and antijamming capability to extraneous signal.
As further preferred, described monitoring probe comprises the core utmost point, and core extremely outside is the insulation course in the middle of sensor, comprises sintered ceramic and ceramic gasket ring, and insulation course outside is provided with seal, and seal comprises welding ring, metal gasket ring, overcoat and gland.
As further preferred, the described core utmost point, welding ring, metal gasket ring, overcoat and gland are made by platinum-rhodium alloy.
As further preferred, described sintered ceramic, ceramic gasket ring are 95% aluminium oxide ceramics.
As further preferred, the signal transmission heart yearn of described signal transmission wire is connected with the core utmost point of monitoring probe.
As further preferred, by weight percentage, the platinum that described platinum-rhodium alloy is 70% and 30% rhodium.
As further preferred, selected pulse energy storage spot welding is welded to connect.This technique not only can guarantee the metallurgical binding of weld effectively, prevents from high temperature bad metallurgical reaction occurring. and adjusting process parameter easily, under low power magnifier monitors in very little spatial operation to control solder joint joint dimension.By material and solder joint are carried out to electrothermal treatment, can further improve quality of welding spot.Test result shows, solder joint does not increase extra resistance value.Through 250 ℃ of 1000-, 1000 temperature alternatings and 900 ℃, after the test of 200h continuous high temperature, all solder joints position situation is still firmly intact.
Beneficial effect of the present invention is as follows: the fastness of the globality of the contactless vibration-measuring sensor of the present invention, the reliability of connection, device is good, the platinum-rhodium alloy of selecting is close with 95% aluminium oxide ceramics thermal expansivity, therefore at high temperature between them, can combine closely, high temperature resistant, anti-oxidant, guarantee to reach monitoring requirement.The unit area power of heater element is controlled in the reasonable scope, and stable performance, extends serviceable life of heater element greatly.And the physical strength of triaxial cable is high, long service life, high temperature resistant, resistance to irradiation and shielded signal ability.
The present invention is transformed into electric weight output by tested non electrical quantity, the physical quantity of describing mechanical vibration amount is converted to the variation of electric weight (electric current, voltage, electric charge) or electrical quantity (resistance, electric capacity, inductance), then transport to " secondary " instrument and amplify and record, show or analyze.
Reliability of the present invention is high.Through the research of observing and controlling authority research institution of University Of Tianjin, think and adopt safety monitoring and the diagnosis that high temperature resistant contactless blade vibration-measuring sensor can be to equipment apparatus for rotating vane vibrations such as aeromotor, power station turbine and various axial-flow compressors, pinpoint the problems and deal with problems early.
The present invention is easy for installation.The volume of the contactless vibration-measuring sensor of high temperature blade is little, adopts embedded mounting means, also very convenient when installing and changing.
Low price of the present invention, economy is high.An important advanced index of modernization development is exactly cheap, and with respect to other high temperature vibration measuring technology equipment used, the cost of the contactless vibration-measuring sensor of high temperature resistant blade is very low, and unit price is only ten thousand yuan of left and right.
Accompanying drawing explanation
Fig. 1 is the contactless Vibration-Measuring System schematic diagram of rotating vane.
Fig. 2 is embodiment of the present invention vibration-measuring sensor structural representation.
Description of symbols in accompanying drawing is as follows: 1-blade, 2-probe, 3-signal processing circuit, 4-data handling system, 5-data analysis system, the 6-core utmost point, 7-sintered ceramic, 8-welding ring, 9-pottery gasket ring, 10-overcoat, 11-metal gasket ring, 12-gland, 13-triaxial cable, 14-pad, 15-packed layer.
Embodiment
The realization of the object of the invention, functional characteristics and beneficial effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, so that those skilled in the art can better understand the present invention also, can be implemented, but illustrated embodiment is not as a limitation of the invention.
Fig. 1 is apparatus for rotating vane vibration automatic measurement system schematic diagram.This system is used the probe 2 that a plurality of structures are identical, and equidistant rotating vane 1 circumferencial direction that is fixed on, is that assurance system is reliable during measurement, only for one of them blade 1, carries out vibration survey analysis.The conversion of signal processing circuit 3 settling signals, and carry out corresponding signal amplification; Data are put system 4 in order and are adopted multi-Channel Data Acquisition Card, count, to determine the time interval according to the setting of trigger point; Data analysis system 5 adopt Computer displays adopt signal, and carry out Spectrum Conversion with FFT, so that fault diagnosis.
Fig. 2 is the structural representation of the high temperature resistant contactless blade vibration-measuring sensor of the embodiment of the present invention, described monitoring probe comprises the core utmost point 6, core extremely outside is the insulation course in the middle of sensor, comprise sintered ceramic 7 and ceramic gasket ring 9, insulation course outside is provided with seal, and seal comprises welding ring 8, metal gasket ring 11, overcoat 10 and gland 12; Triaxial cable 13 is connected with the core utmost point 6.
The described core utmost point 6, welding ring 8, metal gasket ring 11, overcoat 10 and gland 12 are made by platinum-rhodium alloy.
Described sintered ceramic 7, ceramic gasket ring 9 are 95% aluminium oxide ceramics.
Described packed layer 15 is high-purity magnesium oxide micro mist, as the insulator of triaxial cable.
By weight percentage, the platinum that described platinum-rhodium alloy is 70% and 30% rhodium.
Selected pulse energy storage point of the present invention is welded in pad 14 places and is welded to connect.
Claims (8)
1. a high temperature resistant contactless blade vibration-measuring sensor, comprise monitoring probe and the signal transmission wire being attached thereto, it is characterized in that: described monitoring probe comprises the platinum-rhodium alloy seal of the platinum-rhodium alloy core utmost point, 95% aluminium oxide ceramics intermediate insulating layer and insulation course outside.
2. high temperature resistant contactless blade vibration-measuring sensor according to claim 1, it is characterized in that: described signal transmission wire is usingd nickel cobalt (alloy) 4J34 B alloy wire and transmitted heart yearn as signal, select the MgO of high purity micro mist of granularity≤5um as insulator packed layer, 825 alloy materials, as sheath, form a kind of triaxial cable.
3. high temperature resistant contactless blade vibration-measuring sensor according to claim 1 and 2, it is characterized in that: described monitoring probe comprises the core utmost point, core extremely outside is the insulation course in the middle of sensor, comprise sintered ceramic and ceramic gasket ring, insulation course outside is provided with seal, and seal comprises welding ring, metal gasket ring, overcoat and gland.
4. high temperature resistant contactless blade vibration-measuring sensor according to claim 3, is characterized in that: the described core utmost point, welding ring, metal gasket ring, overcoat and gland are platinum-rhodium alloy.
5. high temperature resistant contactless blade vibration-measuring sensor according to claim 3, is characterized in that: described sintered ceramic, ceramic gasket ring are 95% aluminium oxide ceramics.
6. high temperature resistant contactless blade vibration-measuring sensor according to claim 3, is characterized in that: the signal transmission heart yearn of described signal transmission wire is connected with the core utmost point of monitoring probe.
7. according to the high temperature resistant contactless blade vibration-measuring sensor described in claim 1-6 any one, it is characterized in that: by weight percentage, the platinum that described platinum-rhodium alloy is 70% and 30% rhodium.
8. according to the high temperature resistant contactless blade vibration-measuring sensor described in claim 1-7 any one, it is characterized in that: selected pulse energy storage spot welding is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410164745.1A CN103954350A (en) | 2014-04-23 | 2014-04-23 | High temperature resisting non-contact blade vibration testing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410164745.1A CN103954350A (en) | 2014-04-23 | 2014-04-23 | High temperature resisting non-contact blade vibration testing sensor |
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| Publication Number | Publication Date |
|---|---|
| CN103954350A true CN103954350A (en) | 2014-07-30 |
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ID=51331658
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410164745.1A Pending CN103954350A (en) | 2014-04-23 | 2014-04-23 | High temperature resisting non-contact blade vibration testing sensor |
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| Country | Link |
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| CN (1) | CN103954350A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267217A (en) * | 2017-12-29 | 2018-07-10 | 三英精控（天津）仪器设备有限公司 | Shake noise analysis system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2261614A1 (en) * | 2009-06-12 | 2010-12-15 | Mechanical Solutions Inc. | Combined amplitude and frequency measurements for non-contacting turbomachinery blade vibration |
| CN201859010U (en) * | 2010-07-31 | 2011-06-08 | 中山市佐敦音响防盗设备有限公司 | Miniature vibration sensor |
| CN102506989A (en) * | 2011-10-26 | 2012-06-20 | 西安工业大学 | Speed-type vibration sensor with adjustable magnetic circuit |
| CN103364069A (en) * | 2012-04-05 | 2013-10-23 | 中国航空工业集团公司沈阳发动机设计研究所 | Non-contact type rotating blade vibration testing method based on non-rotating speed positioning |
| CN103673863A (en) * | 2013-12-03 | 2014-03-26 | 浙江中欣动力测控技术有限公司 | Capacitive sensor |
-
2014
- 2014-04-23 CN CN201410164745.1A patent/CN103954350A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2261614A1 (en) * | 2009-06-12 | 2010-12-15 | Mechanical Solutions Inc. | Combined amplitude and frequency measurements for non-contacting turbomachinery blade vibration |
| CN201859010U (en) * | 2010-07-31 | 2011-06-08 | 中山市佐敦音响防盗设备有限公司 | Miniature vibration sensor |
| CN102506989A (en) * | 2011-10-26 | 2012-06-20 | 西安工业大学 | Speed-type vibration sensor with adjustable magnetic circuit |
| CN103364069A (en) * | 2012-04-05 | 2013-10-23 | 中国航空工业集团公司沈阳发动机设计研究所 | Non-contact type rotating blade vibration testing method based on non-rotating speed positioning |
| CN103673863A (en) * | 2013-12-03 | 2014-03-26 | 浙江中欣动力测控技术有限公司 | Capacitive sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267217A (en) * | 2017-12-29 | 2018-07-10 | 三英精控（天津）仪器设备有限公司 | Shake noise analysis system |
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Application publication date: 20140730 |