CN103630314A - Blade high on-line air flow excitation system and test method - Google Patents
Blade high on-line air flow excitation system and test method Download PDFInfo
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- CN103630314A CN103630314A CN201310601095.8A CN201310601095A CN103630314A CN 103630314 A CN103630314 A CN 103630314A CN 201310601095 A CN201310601095 A CN 201310601095A CN 103630314 A CN103630314 A CN 103630314A
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Abstract
The invention discloses a blade high on-line air flow excitation system and a test method. The test method comprises the steps: providing a turntable which can rotate around the axis of the turntable, and forming a plurality of through holes which are distributed in a ring shape in the surface of the turntable by surrounding the center of the turntable; driving the turntable to rotate at a certain speed, and enabling the through holes to pass in front of at least one compressed air flow supply device in sequence, and thus, compressed air flow output by the at least one compressed air flow supply device can intermittently permeate the turntable, and excites the tested blade in a pulsed mode. The system comprises the turntable and the at least one compressed air flow supply device. The pulsed air flow is used for exciting the blade, so that the vibration test can be performed on the blade, wherein parameters, such as exciting force, exciting frequency and exciting position, are easy to regulate and control, an actual work environment of the blade can be simulated in a high simulation mode, in particular, the test frequency can reach above 6,000Hz, and the obtained test result is accurate.
Description
Technical field
The present invention relates to a kind of air-flow excited vibration testing equipment, particularly the high online air-flow excitation system of a kind of blade and the high on-line testing method of blade, belong to vibration test technical field.
Background technology
For the blade class device in the equipment such as turbine engine, before application, generally need to carry out vibration-testing to it, to find out the stability of its structure, fatigue strength and serviceable life.The blade of turbine engine, in actual working environment, is due to the fatigue damage that is subject to flow-induced vibration and causes blade.At present, normally utilize electric vibration table to test blade, adopt mechanical excitation principle to realize blade is carried out to torture test, but be limited to the restriction of excitation principle, in this type of vibration-testing process, by frock clamp, tested blade to be fixed, by leaf tenon position, exciting force is delivered to blade, in test process, easily damage leaf tenon, and be difficult to the actual working environment of the simulation blade of high emulation, and the fixedly pattern of its blade is different from actual working state, and then make the vibration-testing data and the actual conditions that obtain have very large error.
Summary of the invention
One of object of the present invention is to provide a kind of blade high on-line testing method, the actual working environment of the simulation blade of the high emulation of its energy, thus overcome deficiency of the prior art.
Two of object of the present invention is to provide a kind of blade high online air-flow excitation system.
For achieving the above object, the present invention has adopted following technical scheme:
The high on-line testing method of blade, comprising:
One rotating disk that can rotate around self axis is provided, and the plural through hole distributing is ringwise set in rotating disk card around described center of turntable,
And, order about described rotating disk according to setting speed rotation, and make this plural number through hole successively from least one compressed air stream feedway the place ahead process, thereby make can intermittently see through described rotating disk and encourage tested blade with pulse mode by the compressed air stream of this at least one compressed air stream feedway output.
The high online air-flow excitation system of blade, comprising:
The rotating disk that can rotate around self axis, is distributed with n through hole ringwise around center of turntable in its card, and n is more than or equal to 1 positive integer;
And at least one compressed air stream feedway, at least in order to when the described turntable rotation, provides and can see through successively from this plural number through hole of described compressed air stream feedway the place ahead process and the compressed air stream of the tested blade of intermittent drive.
As one of wherein feasible embodiment, described compressed air stream feedway has at least one airflow delivery outlet, and the arbitrary selected moment in described turntable rotation process, wherein at least one selected airflow delivery outlet only can coordinate with m through hole on described rotating disk, and m is the positive integer that is less than or equal to n.
As one of wherein feasible embodiment, described compressed air stream feedway has two above airflow delivery outlets, these two above airflow delivery outlets are symmetrical around described rotating disk axis, and the arbitrary selected moment in described turntable rotation process, each airflow delivery outlet only can coordinate with x through hole on described rotating disk, x is the positive integer that is less than n, wherein n >=2.
As one of wherein feasible embodiment, in the arbitrary selected moment when described turntable rotation, each airflow delivery outlet only can coordinate with a through hole on described rotating disk.
Further, the arbitrary selected moment in described turntable rotation process, by the tested blade of the vertical sensing of compressed air stream of the through hole output on described rotating disk.
As one of comparatively preferred embodiment, the diameter of the air-flow input end of described through hole is greater than the diameter of air-flow output terminal.Particularly preferred, described through hole adopts conical through-hole.
As one of wherein feasible embodiment, described rotating disk fixed cover is located in a rotating shaft, and described rotating shaft and drive unit are in transmission connection, and described drive unit is connected with control module.
Further, described compressed air stream feedway and tested blade are installed in respectively on the selected station that is positioned at described rotating disk both sides.
Pass through previous designs, make the present invention compared with prior art at least tool have the following advantages: utilize air pulse excitation blade and blade carried out to vibration-testing, wherein the size of exciting force is, the parameters such as position of the frequency of excitation, excitation are all easy to regulation and control, thereby the actual working environment of the simulation blade of the high emulation of energy, especially, more than test frequency can reach 6000Hz, the test result of acquisition is more accurate.
Accompanying drawing explanation
Fig. 1 is one of structural representation of a preferred embodiment of the present invention;
Fig. 2 be a preferred embodiment of the present invention structural representation two;
Fig. 3 be a preferred embodiment of the present invention structural representation three;
Fig. 4 is the structural representation of a preferred embodiment of the present invention turntable;
Fig. 5 is the structural representation of being located at the through hole on rotating disk in a preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and relevant preferred embodiment, technical scheme of the present invention is further described.
Purport of the present invention is to provide a kind of blade high online air-flow excitation system, and it comprises:
The rotating disk that can rotate around self axis, is distributed with n through hole ringwise around center of turntable in its card, and n is more than or equal to 1 positive integer, is especially greater than 2 positive integer;
And at least one compressed air stream feedway, at least in order to when the described turntable rotation, provides and can see through successively from this plural number through hole of described compressed air stream feedway the place ahead process and the compressed air stream of the tested blade of intermittent drive.
Preferably, aforementioned through-hole can be evenly distributed in rotating disk card.
As a kind of feasible scheme, can on described compressed air stream feedway, set at least one airflow delivery outlet, and in the arbitrary selected moment in described turntable rotation process, wherein at least one selected airflow delivery outlet only can coordinate with m through hole on described rotating disk, and m is the positive integer that is less than or equal to n.
More specifically, compressed air stream feedway can be located at least one selected station that is positioned at rotating disk one side, and these selected stations correspond respectively to the corresponding test position on tested blade, when dial rotation, each through hole on rotating disk is communicated with the airflow delivery outlet of compressed air stream feedway successively.
As the feasible scheme of another kind, can on described compressed air stream feedway, set more than two airflow delivery outlet, and these two above airflow delivery outlets are symmetrical around described rotating disk axis, and the arbitrary selected moment in described turntable rotation process, each airflow delivery outlet only can coordinate with x through hole on described rotating disk, x is the positive integer that is less than n, wherein n >=2.
Certainly, also can in this system, set a plurality of compressed air stream feedwaies, and these compressed air stream feedwaies are symmetrically distributed on the some selected station of rotating disk one side, and the arbitrary selected moment in described turntable rotation process, each compressed air stream feedway only can coordinate with the partial through holes on described rotating disk, and particularly 1 through hole coordinates.
Further, the arbitrary selected moment in described turntable rotation process, should make that compressed air stream by the through hole output on described rotating disk is vertical points to tested blade, thereby under the constant condition such as the pressure of compressed air stream, flow, make compressed air stream can give blade with maximum exciting force.
Refer to shown in Fig. 1-2, in an exemplary embodiments of the present invention, the high online air-flow excitation system of this blade comprises a rotating disk 1 and a pressurized air output mechanism 2, wherein, this rotating disk 1 is arranged in a frame 5 by a rotating shaft 4, and rotating disk can order about and rotating shaft synchronous rotary because of drive unit, and this pressurized air output mechanism 2 and tested blade are also installed in this frame 5, and is located at respectively this rotating disk 1 both sides.
Wherein, the circumference of this rotating disk 1 is evenly distributed with plurality of through holes 11, and when turntable rotation, these through holes 11 can be communicated with the airflow delivery outlet of this pressurized air output mechanism 2 successively.
Comparatively preferred, aforementioned drive unit and also can being all connected with a control module in order to control the flow velocity, the isoparametric solenoid valve of flow etc. of the compressed air stream of pressurized air output mechanism output, operating personnel can adjust by this control module the duty of these drive units and solenoid valve etc.
Postscript, based on promoting the utilization factor of compressed air stream and the consideration of Hoisting System structural stability, for the through hole on rotating disk, can adopt variable diameter design, for example, preferably make the diameter of the air-flow input end of described through hole be greater than the diameter of air-flow output terminal and the airflow delivery outlet bore of pressurized air output mechanism.Particularly, described through hole can adopt conical through-hole, consult Fig. 3, when arbitrary through hole arrives the airflow delivery outlet correspondence position with pressurized air output mechanism, the compressed air stream of being exported by airflow delivery outlet can all enter this through hole substantially, and can not occur dissipate and rotating disk and/or pressurized air output mechanism are caused to excitation at both places, composition surface, and enter after through hole at compressed air stream, can after bringing together in this through hole, eject again (direction as shown in arrow a), so also can improve the stability of compressed air stream output, and then the accuracy of more efficiently lifting vibration-testing.
And the method for utilizing this system to carry out high on-line testing to blade can comprise: order about described rotating disk and rotate according to given pace, and make each through hole on rotating disk successively from this pressurized air output mechanism the place ahead process, thereby make can intermittently be seen through described rotating disk and encourage tested blade with pulse mode by the compressed air stream of this pressurized air output mechanism output.Wherein, the parameters such as the size of exciting force, the frequency of excitation all can be adjusted by adjusting the rotating speed etc. of flow velocity, flow and the rotating disk of compressed air stream, thereby meet different testing requirements.
In addition, quantity that obviously also can be by pressurized air output mechanism and setting position etc. are adjusted, and make it corresponding to the different parts of tested blade, then realize the one-piece construction of tested blade is carried out to full test.
Summarize it, the high online air-flow excitation system of blade of the present invention is simple in structure, is convenient to assembling and safeguards, be easy to use, and when being applied to blade testing, the various actual working environment of the simulation blade of the high emulation of energy, more than test frequency can reach 6000Hz, and institute's test result is more accurate.
It should be noted that, above preferred embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, do various conversion or modification, all belonged to category of the present invention.
Claims (10)
1. the high online air-flow excitation system of blade, is characterized in that, comprising:
The rotating disk that can rotate around self axis, is distributed with n through hole ringwise around center of turntable in its card, and n is more than or equal to 1 positive integer;
And at least one compressed air stream feedway, at least in order to when the described turntable rotation, provides and can see through successively from this plural number through hole of described compressed air stream feedway the place ahead process and the compressed air stream of the tested blade of intermittent drive.
2. the high online air-flow excitation system of blade according to claim 1, it is characterized in that, described compressed air stream feedway has at least one airflow delivery outlet, and the arbitrary selected moment in described turntable rotation process, wherein at least one selected airflow delivery outlet only can coordinate with m through hole on described rotating disk, and m is the positive integer that is less than or equal to n.
3. the high online air-flow excitation system of blade according to claim 1, it is characterized in that, described compressed air stream feedway has two above airflow delivery outlets, these two above airflow delivery outlets are symmetrical around described rotating disk axis,, and the arbitrary selected moment in described turntable rotation process, each airflow delivery outlet only can coordinate with x through hole on described rotating disk, x is the positive integer that is less than n, wherein n >=2.
4. according to the high online air-flow excitation system of the blade described in claim 2 or 3, it is characterized in that, in the arbitrary selected moment when described turntable rotation, each airflow delivery outlet only can coordinate with a through hole on described rotating disk.
5. the high online air-flow excitation system of blade according to claim 1, is characterized in that, the arbitrary selected moment in described turntable rotation process, by the tested blade of the vertical sensing of compressed air stream of the through hole output on described rotating disk.
6. the high online air-flow excitation system of blade according to claim 1, is characterized in that, the diameter of the air-flow input end of described through hole is greater than the diameter of air-flow output terminal.
7. the high online air-flow excitation system of blade according to claim 6, is characterized in that, described through hole adopts conical through-hole.
8. the high online air-flow excitation system of blade according to claim 1, is characterized in that, described rotating disk fixed cover is located in a rotating shaft, and described rotating shaft and drive unit are in transmission connection, and described drive unit is connected with control module.
9. the high online air-flow excitation system of blade according to claim 1, is characterized in that, described compressed air stream feedway and tested blade are installed in respectively on the selected station that is positioned at described rotating disk both sides.
10. the high on-line testing method of blade, is characterized in that, comprising:
One rotating disk that can rotate around self axis is provided, and the plural through hole distributing is ringwise set in rotating disk card around described center of turntable,
And, order about described rotating disk according to setting speed rotation, and make this plural number through hole successively from least one compressed air stream feedway the place ahead process, thereby make can intermittently see through described rotating disk and encourage tested blade with pulse mode by the compressed air stream of this at least one compressed air stream feedway output.
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| CN201310601095.8A CN103630314A (en) | 2013-11-25 | 2013-11-25 | Blade high on-line air flow excitation system and test method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776974A (en) * | 2015-04-07 | 2015-07-15 | 西南交通大学 | Non-contact pneumatic excitation device |
| CN105699033A (en) * | 2016-02-18 | 2016-06-22 | 东北大学 | High frequency air excitation test device for fiber-reinforced combined thin wall member |
| CN106370369A (en) * | 2016-08-16 | 2017-02-01 | 中国航空工业集团公司沈阳发动机设计研究所 | High frequency gas excitation tester |
| CN106404406A (en) * | 2016-10-17 | 2017-02-15 | 西安福赛斯机电科技有限公司 | Aero-engine environment simulation device |
| CN106969893A (en) * | 2017-05-26 | 2017-07-21 | 聚合极致科技有限公司 | Contactless stiffness of structural member detection device and method |
| CN109141794A (en) * | 2018-10-08 | 2019-01-04 | 北京化工大学 | A kind of rotating vane exciting test device and system |
| CN109506867A (en) * | 2019-01-08 | 2019-03-22 | 大连交通大学 | A kind of air-flow-heat engine coupling excitation experimental rig |
| CN109612663A (en) * | 2019-01-08 | 2019-04-12 | 大连交通大学 | A kind of rotation high-frequency alternating air-flow excitation experimental rig |
| CN110068439A (en) * | 2019-04-25 | 2019-07-30 | 西安交通大学 | Rotor blade multiple modal vibrations exciting bank and its motivational techniques |
| CN111721494A (en) * | 2020-05-12 | 2020-09-29 | 中国空气动力研究与发展中心低速空气动力研究所 | Large-flow high-frequency pulse blowing device |
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| CN203070753U (en) * | 2013-01-31 | 2013-07-17 | 中国人民解放军国防科学技术大学 | Discrete push-pull air-flow excitation type infrasonic-wave generator |
| CN103398051A (en) * | 2013-07-15 | 2013-11-20 | 中国航天科技集团公司第六研究院第十一研究所 | Steplessly-regulated sinusoidal high-frequency oscillation experiment device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104776974A (en) * | 2015-04-07 | 2015-07-15 | 西南交通大学 | Non-contact pneumatic excitation device |
| CN104776974B (en) * | 2015-04-07 | 2018-07-31 | 西南交通大学 | A kind of non-contact pneumatic exciting device |
| CN105699033A (en) * | 2016-02-18 | 2016-06-22 | 东北大学 | High frequency air excitation test device for fiber-reinforced combined thin wall member |
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| CN106370369B (en) * | 2016-08-16 | 2019-02-05 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of high-frequency gas excitation exerciser |
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| CN106969893A (en) * | 2017-05-26 | 2017-07-21 | 聚合极致科技有限公司 | Contactless stiffness of structural member detection device and method |
| CN106969893B (en) * | 2017-05-26 | 2024-02-20 | 成都中科卓尔智能科技集团有限公司 | Non-contact member rigidity detection equipment and method |
| CN109141794A (en) * | 2018-10-08 | 2019-01-04 | 北京化工大学 | A kind of rotating vane exciting test device and system |
| CN109506867A (en) * | 2019-01-08 | 2019-03-22 | 大连交通大学 | A kind of air-flow-heat engine coupling excitation experimental rig |
| CN109612663A (en) * | 2019-01-08 | 2019-04-12 | 大连交通大学 | A kind of rotation high-frequency alternating air-flow excitation experimental rig |
| CN109506867B (en) * | 2019-01-08 | 2021-01-05 | 大连交通大学 | Air flow-heat engine coupling excitation test device |
| CN109612663B (en) * | 2019-01-08 | 2021-01-05 | 大连交通大学 | Rotary high-frequency alternating airflow excitation test device |
| CN110068439A (en) * | 2019-04-25 | 2019-07-30 | 西安交通大学 | Rotor blade multiple modal vibrations exciting bank and its motivational techniques |
| CN111721494A (en) * | 2020-05-12 | 2020-09-29 | 中国空气动力研究与发展中心低速空气动力研究所 | Large-flow high-frequency pulse blowing device |
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Application publication date: 20140312 |