CN206905879U - A kind of separate type Natural Frequency of Blade detection means - Google Patents
A kind of separate type Natural Frequency of Blade detection means Download PDFInfo
- Publication number
- CN206905879U CN206905879U CN201720320013.6U CN201720320013U CN206905879U CN 206905879 U CN206905879 U CN 206905879U CN 201720320013 U CN201720320013 U CN 201720320013U CN 206905879 U CN206905879 U CN 206905879U
- Authority
- CN
- China
- Prior art keywords
- blade
- fixture
- power amplifier
- shake table
- natural frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of separate type Natural Frequency of Blade detection means, belong to device for detecting inherent frequency field, including shake table, fixture is provided with wherein on the shake table, acceleration sensor is provided with the fixture, blade is clamped with the fixture, velocity sensor is provided with the surface of the vane nose, vibration test controller is arranged with the periphery of the shake table, PC and power amplifier, the vibration tester respectively with PC, power amplifier, velocity sensor connects with the sensor accelerated, the power amplifier is connected with display panel, the utility model acceleration transducer and blade are contactless, therefore when detecting the intrinsic frequency of blade, acceleration transducer is eliminated to disturb to caused by blade, and then improve the Detection results of Natural Frequency of Blade.
Description
Technical field
A kind of device for detecting inherent frequency is the utility model is related to, especially a kind of separate type Natural Frequency of Blade detection dress
Put.
Background technology
Rotor blade is one of key components and parts of aero-engine, to the overall performance particularly security of engine and
Reliability effect is great.Rotor blade quantity is more, condition of work is severe, when not only rotating at a high speed the centrifugal load born it is big,
Tip speed is high, and under the complex work environment of multi- scenarios method such as airflow field, pressure field, sound field, temperature field, causes it
It is quiet, dynamic stress is horizontal higher, tend to produce high cycles fatigue crackle because of vibration or even fracture, cause major accident.
According to statistics, blade vibration failure constitutes about 1/3rd of aero-engine structure class failure, crackle, the blade such as fracture therefore
Barrier is mostly caused by blade vibration, will be caused when the frequency of forced vibration and the identical intrinsic frequency of blade altogether
Shake and cause blade damage, therefore the intrinsic frequency of pilot blade free vibration is just particularly important.
The measuring technology of traditional test test system belongs to contact type measurement, and wherein acceleration transducer is directly installed on
On blade, the acceleration information of blade is gathered to measure the first natural frequency of blade by the vibration of blade.This test
The method of testing of system, because the quality of acceleration transducer influences, and measurement object leaflet tablet quality is also small, causes to measure
Acceleration have very big error, have a strong impact on the accuracy of test result
Utility model content
Technical assignment of the present utility model is to be directed to above the deficiencies in the prior art, and it is intrinsic to provide a kind of separate type blade
Frequency detecting device.
Technical scheme is used by the utility model solves its technical problem：A kind of separate type Natural Frequency of Blade detection
Device, including shake table, wherein being provided with fixture on the shake table, acceleration sensor is provided with the fixture, described
Blade is clamped with fixture, velocity sensor is provided with the surface of the vane nose, sets up separately in the periphery of the shake table
There are vibration test controller, PC and power amplifier, the vibration tester passes with PC, power amplifier, speed respectively
Sensor connects with the sensor accelerated, and the power amplifier is connected with display panel.
The advantages of the utility model：
(1) performance indications are excellent, fully meet the dither test request of vanelets；
(2) laser vibration measurer used in this experiment belongs to non-contact measurement, and no additional mass influences to tie measurement
Fruit, so as to greatly improve signal to noise ratio, make measured value more accurate；
(3) basis shows with research institute and business tie-up project testing result, and this system has collocation rationally, test side
Just, the series of advantages such as frequency fluctuation is small.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
1 shake table, 2 fixtures, 3 vibration testers, 4 power amplifiers, 5 blades, 6 velocity sensors, 7 accelerate
Sensor, 8 PCs, 9 display panels.
Embodiment
The utility model is described below with reference to Figure of description.
As illustrated, a kind of separate type Natural Frequency of Blade detection means, including shake table 1, wherein in the shake table 1
Fixture 2 is provided with, acceleration sensor 7 is provided with the fixture 2, blade 5 is clamped with the fixture 2, in the blade 5
The surface of front end is provided with velocity sensor 6, and vibration test controller 3, the and of PC 8 are arranged with the periphery of the shake table 1
Power amplifier 4, the vibration tester 3 respectively with PC 8, power amplifier 4, velocity sensor 6 and accelerate sensor 7
Connection, the power amplifier 4 are connected with display panel 9.
Vibration velocity of this experiment using laser vibration measurer using laser doppler principle measurement blade, belongs to non-and connects
Touch measures.
Non-contact measurement is application of the Doppler effect in blade testing field.Doppler effect is i.e. when wave source is towards connecing
When receiving device movement, the ripple transmitted between wave source and receiver will change, and wavelength shortens, frequency rise；Conversely, when wave source is carried on the back
When receiver movement, the wavelength of the ripple transmitted between wave source and receiver will be elongated, and frequency can reduce.When vertical incidence phase
Doppler's frequency of dry laser light wave
IfD
Rate has following relational expression with testee vibration velocity V and wavelength X：
It follows that laser-Doppler vibration measuring principle be namely based on measurement it is anti-from body surface tiny area
IfD
The Doppler frequency for the coherent laser light wave being emitted back towards, and then determine the vibration velocity V of the measuring point.Finally speed is passed
In sensor signal input PC, the intrinsic frequency of blade is calculated.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (1)
1. a kind of separate type Natural Frequency of Blade detection means, including shake table, it is characterised in that：It is provided with the shake table
Fixture, acceleration sensor is provided with the fixture, blade is clamped with the fixture, in the surface of the vane nose
Provided with velocity sensor, vibration test controller, PC and power amplifier are arranged with the periphery of the shake table, it is described to shake
Dynamic test instrument is connected with PC, power amplifier, velocity sensor and the sensor of acceleration respectively, the power amplifier connection
There is display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720320013.6U CN206905879U (en) | 2017-03-30 | 2017-03-30 | A kind of separate type Natural Frequency of Blade detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720320013.6U CN206905879U (en) | 2017-03-30 | 2017-03-30 | A kind of separate type Natural Frequency of Blade detection means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206905879U true CN206905879U (en) | 2018-01-19 |
Family
ID=61295665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720320013.6U Expired - Fee Related CN206905879U (en) | 2017-03-30 | 2017-03-30 | A kind of separate type Natural Frequency of Blade detection means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206905879U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593230A (en) * | 2018-03-27 | 2018-09-28 | 西北工业大学 | A kind of Natural Frequency of Blade Auto-Test System |
| CN109374123A (en) * | 2018-12-14 | 2019-02-22 | 蚌埠学院 | A kind of large scale equipment intrinsic frequency measuring device |
| CN109531059A (en) * | 2018-11-13 | 2019-03-29 | 重庆三友机器制造有限责任公司 | A kind of braking disc manufacturing method |
| CN109590751A (en) * | 2018-11-13 | 2019-04-09 | 重庆三友机器制造有限责任公司 | A kind of brake disc manufacture system |
| CN109855829A (en) * | 2018-12-25 | 2019-06-07 | 大连海事大学 | Dynamic power machine blade vibration characteristic research experiment device |
| CN110220662A (en) * | 2019-07-23 | 2019-09-10 | 湖南南方通用航空发动机有限公司 | A kind of test method of blade high frequency static frequency |
-
2017
- 2017-03-30 CN CN201720320013.6U patent/CN206905879U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593230A (en) * | 2018-03-27 | 2018-09-28 | 西北工业大学 | A kind of Natural Frequency of Blade Auto-Test System |
| CN109531059A (en) * | 2018-11-13 | 2019-03-29 | 重庆三友机器制造有限责任公司 | A kind of braking disc manufacturing method |
| CN109590751A (en) * | 2018-11-13 | 2019-04-09 | 重庆三友机器制造有限责任公司 | A kind of brake disc manufacture system |
| CN109590751B (en) * | 2018-11-13 | 2023-03-07 | 重庆三友机器制造有限责任公司 | Brake disc manufacturing system |
| CN109531059B (en) * | 2018-11-13 | 2023-03-10 | 重庆三友机器制造有限责任公司 | Manufacturing method of brake disc |
| CN109374123A (en) * | 2018-12-14 | 2019-02-22 | 蚌埠学院 | A kind of large scale equipment intrinsic frequency measuring device |
| CN109855829A (en) * | 2018-12-25 | 2019-06-07 | 大连海事大学 | Dynamic power machine blade vibration characteristic research experiment device |
| CN110220662A (en) * | 2019-07-23 | 2019-09-10 | 湖南南方通用航空发动机有限公司 | A kind of test method of blade high frequency static frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180119 Termination date: 20190330 |