CN203534825U - Small high-temperature vibration sensor - Google Patents
Small high-temperature vibration sensor Download PDFInfo
- Publication number
- CN203534825U CN203534825U CN201320665189.7U CN201320665189U CN203534825U CN 203534825 U CN203534825 U CN 203534825U CN 201320665189 U CN201320665189 U CN 201320665189U CN 203534825 U CN203534825 U CN 203534825U
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- Prior art keywords
- piezoelectric element
- pedestal
- temperature
- high temperature
- vibration transducer
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- Expired - Lifetime
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 24
- 238000002955 isolation Methods 0.000 claims description 10
- 230000036316 preload Effects 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 8
- 230000035945 sensitivity Effects 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical group [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000005611 electricity Effects 0.000 abstract 3
- 238000010008 shearing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
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- Testing Of Engines (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a small high-temperature vibration sensor. The small high-temperature vibration sensor comprises a cable, a base, a shielding can, a sensor sensitive assembly, a pre-tightening nut and a pre-tightening screw. The sensor sensitive assembly comprises a piezoelectric element, isolating gaskets, electricity guiding sheets and a mass block; the piezoelectric element is only sensitive to vibrations in the longitudinal direction and outputs nothing about vibrations in other direction, the isolating gaskets are located on two sides of the piezoelectric element, the electricity guiding sheets are arranged on a surface of the piezoelectric element, and the mass block is disposed on a side, away from the base, of the piezoelectric element; the high-temperature cable is connected with the electricity guiding sheets through the base; the sensor sensitive assembly is fixed to a side face of the base through the pre-tightening nut and the pre-tightening screw, is assembled in the axial direction of the base and is perpendicular to the vibration direction; and the shielding can covers the sensor sensitive assembly and is connected with the base. The small high-temperature vibration sensor is small in size and light in weight, the temperature resistance capability achieves 650 DEG C, the small high-temperature vibration sensor can be directly installed on an internal vibration source of an engine to test vibrations of high-temperature parts of an aero-engine, and the accuracy of a vibration test of the aero-engine is improved.
Description
Technical field
The invention belongs to aviation observation and control technology field, be specifically related to aeromotor vibration-testing and high-temperature vibrating sensor technology.
Background technology
Aeromotor is the heart of aircraft, performance and safety that its performance quality and security are directly connected to whole airplane.The more than 90% structural strength fault of aeromotor be all by vibration cause or with vibration relevant.In reseach of engine, production and operational process, aeromotor vibration-testing is a very important link, is the important content of engine reliability test.At present, the vibration-testing of aeromotor is subject to the restriction of sensor temperature resistant capability, and installation of sensors is in engine front and rear fulcrum, measures the vibration of engine crankcase, vibration measuring point from vibration source away from, be subject to the interference that engine structure vibrates, measuring error is larger.Development along with aero propulsion technology, test request improves constantly, and needs sensor miniaturization, test point near vibration source, the complicated random vibration of the high temperature positions such as direct testing high voltage turbine, rotor bearing, improve the accuracy of vibration survey, guarantee the safety and reliability of aeromotor.The senor operating temperature that meets this test request need reach 650 ℃, and even higher, the temperature resistant capability of domestic high-temperature vibrating testing sensor, reliability also do not reach this requirement.
Summary of the invention
For the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of mini type high temperature vibration transducer, temperature resistant capability reaches 650 ℃, can directly be installed in engine the vibration at the engine high-temperature positions such as testing high voltage turbine, bearing and engine complete machine.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of mini type high temperature vibration transducer, comprise cable, pedestal, cage, sensor sensing assembly, pre-load nut, pretension screw rod, described sensor sensing assembly comprises a sensitivity and vibrates longitudinally, to the piezoelectric element of the vibration no-output of other directions, be positioned at piezoelectric element both sides isolation pad, be arranged on electric sheet of drawing of piezoelectric element surface and be placed on piezoelectric element away from the mass of pedestal one side; High-temperature cable by pedestal with draw electric sheet and join, axially assemble along pedestal the side that sensor sensing assembly is fixed on pedestal by pretension screw rod and pre-load nut, vertical with direction of vibration, cage merges sensor sensing module cover to be connected with pedestal.
Preferably, piezoelectric element is for passing through around 5 ° of X-axis ROT13s, rotating the piezoelectric element of 35.1 ° of secondary rotatings cuttings, longitudinal polarization around Y-axis.
Preferably, piezoelectric element adopts 960 ℃ of Curie temperature, meets the inner piezoelectric ceramics of being in of 650 ℃ of job requirements.
Preferably, piezoelectric element is of a size of Φ 9 * Φ 5 * 1mm.
Preferably, the screen layer of high-temperature cable, pedestal, cage, drawing that electric sheet, pre-load nut, pretension screw rod adopt can be at the high-temperature alloy material of long-term work below 700 ℃.
Preferably, mass employing proportion is 16-17(g/cm
3) high-density alloy.
Preferably, high-density alloy is copper tungsten 90.
Preferably, isolation pad is ceramic isolation pad.
Preferably, high-temperature cable adopts welding manner to be connected with pedestal.
When engine luggine, mass is responsive to engine luggine, produce a shearing force longitudinally, piezoelectric element is by circumgyration incision, longitudinal polarization, sensitivity is vibrated longitudinally, vibration to other directions is insensitive, and piezoelectric element produces the charge signal being directly proportional to vibratory output under the effect of this shearing force, and this signal is transferred to the signal conditioner of far-end by drawing electric sheet, high-temperature cable, convert the voltage signal corresponding with vibratory output to, realize engine luggine and measure.
Compared with prior art, the beneficial effects of the utility model are: the design of sensor construction lateral shear, improve sensor high temperature resistance impact property, sensor and high-temperature cable adopt integrated high temperature high design, improve the reliability of sensor signal transmission, and sensor bulk is little, lightweight, temperature resistant capability reaches 650 ℃, can directly be installed on engine interior vibration source, test the vibration of aeromotor high temperature position, improve the accuracy of aeromotor vibration-testing.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of mini type high temperature vibration transducer of the utility model.
Fig. 2 is the structural representation of the utility model piezoelectric element.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described in detail.
Referring to Fig. 1, a kind of mini type high temperature vibration transducer that is applied to aeromotor comprises high-temperature cable 1, pedestal 2, cage 3, draws the compositions such as electric sheet 4, mass 5, pre-load nut 6, pretension screw rod 7, isolation pad 8, piezoelectric element 9.Piezoelectric element 9, mass are fixed on pedestal side by pretension screw rod, pre-load nut, along pedestal, axially assemble.Piezoelectric element 9 passes through around 5 ° of X-axis ROT13s, around Y-axis, rotates 35.1 ° of secondary rotatings cuttings, longitudinal polarization, and a sensitivity is vibrated longitudinally, and the vibration no-output to other directions is of a size of Φ 9 * Φ 5 * 1mm.Piezoelectric element 9 two ends are refractory ceramics isolation pads 8, and with the isolation of the metal parts such as pedestal, centre is to draw electric sheet 4, draws charge signal, cage 3 and pedestal welding, shielding isolation external interference.
The screen layer of high-temperature cable 1, pedestal 2, cage 3, draw electric sheet 4, pre-load nut 6, pretension screw rod 7 and adopt high-temperature alloy materials, can be in long-term work below 700 ℃.Mass adopts high-density alloy, has higher quality and less volume.Piezoelectric element adopts and is in inner piezoelectric ceramics, and 960 ℃ of Curie temperature meet 650 ℃ of job requirements.High-temperature cable 1 is welded as a whole with pedestal 2, reduces connector connecting link, and the reliability of signal transmission is provided.
Sensor is fixed on engine by middle mounting hole 10, when engine luggine, the responsive engine luggine of mass 5, produce a shearing force longitudinally, piezoelectric element 9 is subject to the effect of shearing force, on piezoelectric element surface, produces the charge signal corresponding with shearing force, draws electric sheet 4 and passes through accurate miniature weld connection with cable 1, charge signal is transferred to the relatively low signal conditioner of far-end temperature, converts charge signal to the voltage signal corresponding with vibratory output.Realize engine high-temperature vibration survey.Whole responsive assembly is horizontal assembling, vertical with direction of vibration, the various thermal stress that temperature produces mainly pedestal axially, and piezoelectric element is only to direction of vibration (longitudinally) sensitivity, vibration to horizontal thermal stress and other directions is insensitive, pyroelectricity output and the cross sensitivity that can effectively reduce sensor, improve the performance that sensor resisting temperature is impacted, and meets the job requirement of aeromotor high-temperature severe environment.
Claims (9)
1. a mini type high temperature vibration transducer, comprises cable, pedestal, cage, sensor sensing assembly, pre-load nut, pretension screw rod, it is characterized in that:
Described sensor sensing assembly comprises a sensitivity and vibrates longitudinally, to the piezoelectric element of the vibration no-output of other directions, be positioned at piezoelectric element both sides isolation pad, be arranged on electric sheet of drawing of piezoelectric element surface and be placed on piezoelectric element away from the mass of pedestal one side;
High-temperature cable by pedestal with draw electric sheet and join, axially assemble along pedestal the side that sensor sensing assembly is fixed on pedestal by pretension screw rod and pre-load nut, vertical with direction of vibration, cage merges sensor sensing module cover to be connected with pedestal.
2. a kind of mini type high temperature vibration transducer according to claim 1, is characterized in that described piezoelectric element is for passing through around 5 ° of X-axis ROT13s, rotating the piezoelectric element of 35.1 ° of secondary rotatings cuttings, longitudinal polarization around Y-axis.
3. a kind of mini type high temperature vibration transducer according to claim 1, is characterized in that described piezoelectric element adopts 960 ℃ of Curie temperature, meets the inner piezoelectric ceramics of being in of 650 ℃ of job requirements.
4. a kind of mini type high temperature vibration transducer according to claim 1, is characterized in that described piezoelectric element is of a size of Φ 9 * Φ 5 * 1mm.
5. a kind of mini type high temperature vibration transducer according to claim 1, it is characterized in that described high-temperature cable screen layer, pedestal, cage, draw electric sheet, pre-load nut, pretension screw rod adopts can be at the high-temperature alloy material of long-term work below 700 ℃.
6. a kind of mini type high temperature vibration transducer according to claim 1, is characterized in that it is 16-17g/cm that described mass adopts proportion
3high-density alloy.
7. a kind of mini type high temperature vibration transducer according to claim 7, is characterized in that described high-density alloy is copper tungsten 90.
8. a kind of mini type high temperature vibration transducer according to claim 1, is characterized in that described isolation pad is ceramic isolation pad.
9. mini type high temperature vibration transducer according to claim 1, is characterized in that described high-temperature cable and pedestal adopt welding manner to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665189.7U CN203534825U (en) | 2013-10-25 | 2013-10-25 | Small high-temperature vibration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665189.7U CN203534825U (en) | 2013-10-25 | 2013-10-25 | Small high-temperature vibration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203534825U true CN203534825U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320665189.7U Expired - Lifetime CN203534825U (en) | 2013-10-25 | 2013-10-25 | Small high-temperature vibration sensor |
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|---|---|
| CN (1) | CN203534825U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609391A (en) * | 2023-06-19 | 2023-08-18 | 哈尔滨学院 | Polymer material electrical property testing device |
| CN116859082A (en) * | 2023-09-05 | 2023-10-10 | 山东利恩斯智能科技有限公司 | Double-shaft acceleration sensor and mounting and measuring method thereof |
-
2013
- 2013-10-25 CN CN201320665189.7U patent/CN203534825U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609391A (en) * | 2023-06-19 | 2023-08-18 | 哈尔滨学院 | Polymer material electrical property testing device |
| CN116609391B (en) * | 2023-06-19 | 2023-11-24 | 哈尔滨学院 | Polymer material electrical property testing device |
| CN116859082A (en) * | 2023-09-05 | 2023-10-10 | 山东利恩斯智能科技有限公司 | Double-shaft acceleration sensor and mounting and measuring method thereof |
| CN116859082B (en) * | 2023-09-05 | 2023-12-15 | 山东利恩斯智能科技有限公司 | Double-shaft acceleration sensor and mounting and measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |