CN110006642A - A kind of vibrate adds centrifugal compound fatigue rig - Google Patents
A kind of vibrate adds centrifugal compound fatigue rig Download PDFInfo
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- CN110006642A CN110006642A CN201910309330.1A CN201910309330A CN110006642A CN 110006642 A CN110006642 A CN 110006642A CN 201910309330 A CN201910309330 A CN 201910309330A CN 110006642 A CN110006642 A CN 110006642A
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- leaf dish
- vibration
- shake table
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 19
- 238000005119 centrifugation Methods 0.000 claims description 7
- 238000009661 fatigue test Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 15
- 238000000703 high-speed centrifugation Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of vibration plus centrifugal compound fatigue rigs, test for blade fatigue, the force piece including shake table, leaf dish and the driving blade；The blade is embedded in the leaf dish, and the leaf dish can drive the blade to rotate under the driving of the force piece, the centrifugal load born to simulate the blade；The leaf dish is connect by bearing assembly with the shake table, and vibration force is passed to the blade.The present invention can be realized the compound of centrifugal force load and high-frequency vibration load, closer to the actual condition of blade when test.
Description
Technical field
The present invention relates to blade fatigue testing fields, and in particular to a kind of vibrate adds centrifugal compound fatigue rig.
Background technique
Blade, can for the structural intergrity and use of engine as one of the key of aero-engine and important component
It is of crucial importance by property, the failure of usual blade will will cause serious accident.Therefore, make for guarantee blade
With safety, blade processing must simulate its safe cycle life by testing after the completion.
The patent of invention that application publication number is CN 104062104A discloses aero-engine compressor blade fatigue circulation
Experimental rig comprising centrifugal force charging assembly, for simulating the centrifugal force circulation born when blade of aviation engine work
Load, the experimental rig further include high-frequency vibration charging assembly, for simulating aero-engine compressor blade working Shi Suocheng
The high frequency load received.Using centrifugal force low circulation load and high frequency load test, the safe and reliable predetermined safety circulation longevity is provided
Life, avoids using security risk.
But above-mentioned blade fatigue circulation test device is during the test, simulation centrifugal force low circulation load and simulation
High frequency load independently carries out.In actual condition, the load that blade is born is more complicated, not merely by perpendicular to rotation
The gas shock in direction simultaneously because blade itself is in high speed rotation, thus will receive the effect of high speed centrifugation field, therefore needs same
When simulation high-frequency vibration load and high speed centrifugation power load.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of vibration plus centrifugal compound fatigue rigs, can be realized
Blade high speed centrifugation power load and high-frequency vibration load it is compound, closer to the actual condition of blade when test.
In order to solve the above-mentioned technical problems, the present invention provides a kind of vibration plus centrifugal compound fatigue rigs, are used for
Blade fatigue test, the force piece including shake table, leaf dish and the driving blade；The blade is embedded in the leaf dish,
The leaf dish can drive the blade to rotate under the driving of the force piece, carry to simulate the centrifugation that the blade is born
Lotus；The leaf dish is connect by bearing assembly with the shake table, and vibration force is passed to the blade.
Further, the size of the leaf dish is smaller.
Further, the rotation axis of the leaf dish is arranged along the vertical direction.
Further, the vibration axis collinear of the rotation axis of the leaf dish and the shake table.
Further, the force piece is connect by high-speed flexible shaft coupling with the leaf dish.
Further, the vibration plus centrifugal compound fatigue rig further include portal frame, and the force piece is fixed
On the portal frame.
Further, the bearing assembly includes bearing block and high-speed bearing, and the bearing block passes through the high-speed bearing
It is rotatablely connected with the leaf dish, the bearing block is fixedly connected by mounting bracket with the shake table.
Further, the shake table upper cover is equipped with shield, and the leaf dish and the blade are arranged at the protection
Cover is internal.
Beneficial effects of the present invention:
1, the blade high-speed rotation being embedded on it is driven using leaf dish, is born when so as to simulate blade working
High speed centrifugation power load；Using the shake table being arranged in below leaf dish, can simulate under the action of high-frequency vibration load
The operating condition of blade；Under the action of leaf dish and common shake table, the high frequency that is born when can simulate blade high speed rotation simultaneously
Oscillating load and high speed centrifugation power load, so that the test environment of blade can be surveyed effectively closer to its true operating condition
Try the fatigue life of blade；
2, it when simulating the operating condition under Centrifugal Load, is mounted in leaf dish using force piece driving leaf dish with driving
Blade rotation, such set-up mode are more nearly with the actual working environment of blade；So as to simulate the uniformly distributed centrifugation of high speed
Load, and additional stiffness will not be generated, the confidence level for the safe cycle life of blade that test obtains is improved, is reduced existing
Security risk；
3, the connection that leaf dish and shake table are realized using bearing assembly realizes that blade high speed is revolved by bearing assembly and leaf dish
The transmitting of shake table exciting force when turning, and the decline of vibration exciting force can be reduced；Bearing assembly can reduce leaf dish height simultaneously
Frictional resistance when speed rotation.
Detailed description of the invention
Fig. 1 is overall schematic of the invention；
Fig. 2 is the overall schematic of this leaf dish and bearing assembly；
Fig. 3 is leaf dish and blade scheme of installation；
Fig. 4 is the Equivalent Mechanical Model of coupled system.
Figure label explanation: 1, shake table；11, shield；12, mounting bracket；2, leaf dish；21, connecting shaft；3, blade；
4, bearing block；41, high-speed bearing；42, bearing (ball) cover；43, locking nut；44, spacer；5, gantry support；51, force piece；52,
High-speed flexible shaft coupling.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Shown in referring to Fig.1, an embodiment of a kind of vibration of the present invention plus centrifugal compound fatigue rig is used for blade
3 fatigue test, including shake table 1 and the leaf dish 2 being arranged in above shake table 1.During the test, by the to be measured of whole
Blade 3 is tried along the circumferentially fixed installation of leaf dish 2, the axis of the blade 3 that is fixed thereon along leaf dish 2 is driven using the rotation of leaf dish 2
To rotation.Directly the tenon of blade 3 is mounted in the tongue-and-groove of leaf dish 2 in the present embodiment, and is revolved using leaf dish 2 with movable vane piece 3
The test environment turned is more nearly true operating condition.Adding for centrifugal force generally is realized using centrifugal loading device in the prior art
Carry, but the centrifugal force being applied on blade 3 at this time is constant power, compared with the existing technology for, using leaf dish 2 with movable vane piece
To be applied to 3 centrifugal force of blade, the centrifugal force being applied on blade 3 at this time is dynamic active force, and can be uniform for 3 rotations
It is distributed on blade 3.In addition, in the prior art when realizing the load of centrifugal force using centrifugal loading device, this centrifugation load
Device can be attached on blade, thus can generate additional mass.When blade 3 vibrates, centrifugal loading device can generate blade 3
Additional rigidity.Thus be installed in leaf dish 2 using blade 3, by leaf dish 2 rotate band movable vane piece 3 rotate when it is generated from
Heart load working condition can be more nearly actual condition when blade 3 works.
Referring to Figure 1 and Figure 3, vibration plus centrifugal compound fatigue rig further include portal frame 5 and for drive leaf dish 2 revolve
The force piece 51 turned, force piece 51 are fixed on portal frame 5, the preferred high-speed motor of force piece 51 in the present embodiment.The axis of leaf dish 2
Line is arranged along the vertical direction, thus the blade 3 being mounted in leaf dish 2 rotates along the vertical direction.Further, the axis of leaf dish 2
With the axis collinear of shake table 1, it is thus possible to reduce the generation of additional moment, it is generated inclined when leaf dish 2 is installed to reduce
Influence of the mental and physical efforts square to centrifugal force.The axis of leaf dish 2 is arranged along the vertical direction, breaches the limitation of driving motor level height,
Force piece 51 is fixed on the gantry simultaneously, convenient for according to different test demands that leaf dish 2 is fixed from different shake tables 1.
Referring to Fig.1, force piece 51 transmits torque to leaf dish 2, high-speed flexible shaft coupling by high-speed flexible shaft coupling 52
52 can be absorbed vibration in itself, can not only transmit biggish torque, and have axial amount of exercise, can compensate for axial direction
Vibration displacement.And it is applied in the driving coupling of high-speed high-power, movement can be made steady reliable.Force piece 51 passes through height
Fast flexible clutch 52 drives the blade 3 in leaf dish 2 to rotate, to simulate the high speed centrifugation power load that blade 3 is born；Simultaneously
Bearing assembly and shake table below leaf dish 2 are set, to simulate the high frequency vibrating dynamic load born when 3 high speed rotation of blade
Lotus.Operating condition of the blade 3 in the combinational environment of vibration plus centrifugation can be thus simulated in the way of such, so that simulated environment
It is more nearly the real working condition of blade 3.
Referring to Figures 1 and 2, leaf dish 2 is connect by bearing assembly with shake table 1, and shake table 1 passes through bearing assembly and leaf dish
Vibration force is passed to blade 3 by 2, to simulate the operating condition of the blade 3 under oscillating load effect；Leaf dish 2 passes through rotation band simultaneously
Movable vane piece 3 rotates, to simulate the operating condition of the blade 3 under Centrifugal Load.Thus utilize the common of shake table 1 and leaf dish 2
Effect can simulate operating condition of the blade 3 in the combinational environment of vibration plus centrifugation, so that simulated environment is more nearly blade 3
Real working condition.The interference between vibration force and centrifugal force is reduced by bearing assembly in the present embodiment, bearing assembly can either high speed
Rotation to reduce resistance when leaf dish 2 moves, while can transmit and resistance to vibrated.Bearing assembly includes bearing block 4 and height
The upper end of fast bearing 41, bearing block 4 is fixedly connected with leaf dish 2, and lower end is connect by mounting bracket 12 with shake table 1.
The connection that bearing block 4 and shake table 1 are realized using mounting bracket 12, facilitates the tune of 2 position of replacement and leaf dish of later period shake table 1
It is whole, to guarantee the axis coincidence of the axis and shake table 1 of leaf dish 2.It is connect by mounting bracket 12 with shake table 1, and will vibration
Power passes to the connection type of leaf dish 2 and blade 3, can reach higher intrinsic frequency and rigidity, to meet high-frequency vibration
The needs of test.
Referring to Figures 1 and 2, high-speed bearing 41 includes inner ring, outer ring and rolling element, in order to reduce leaf dish 2 and shake table 1
Movement interference, leaf dish 2 realize the transmitting of axial vibration by connecting shaft 21 and high-speed bearing 41.The setting of high-speed bearing 41 is connecting
Between axis 21 and bearing block 4, the inner ring of high-speed bearing 41 is set in connecting shaft 21, and is fixedly connected with connecting shaft 21.Inner ring
Upper end positioned by the shaft shoulder of connecting shaft 21, inner ring lower end is positioned by spacer 44 and end face locking nut 43, and is provided pre-
Clamp force.Rolling element is placed between inner ring and outer ring, and outer ring lower end is positioned by bearing (ball) cover 42, and outer ring upper end passes through bearing block
4 position, and bearing (ball) cover 42 is fixed on bearing block 4 by screw, to carry out radial direction to high-speed bearing 41 by bearing block 4
Positioning.Bearing block 4 is fixed by screw and mounting bracket 12, and mounting bracket 12 is fixedly installed on 1 moving-coil table top of shake table, leads to
The vertical vibration of shake table 1 can be passed to high-speed rotating leaf dish 2 by crossing such frame mode, so that blade 3 is passed to, it is real
The composite testing of the existing vibration of blade 3 plus centrifugation.
Referring to Fig.1 and Fig. 4, in order to guarantee that the intrinsic frequency of system and the efficiency of transmitting, the size of leaf dish 2 can reduce.For
Convenient for the foundation and analysis of model, system is simplified to Vibrating System with Two Degrees of Freedom, wherein leaf dish 2, connecting shaft 21, high speed
The inner ring of bearing 41 is reduced to mass block m1, the outer ring letter of 1 moving-coil of shake table, mounting bracket 12, bearing block 4, high-speed bearing 41
Turn to mass block m2, and m2 > > m1.Wherein, the rigidity of bearing is simplified to k1, and the support stiffness of shake table 1 is simplified to k2, and k2 <
The Equivalent Mechanical Model of < k 1, coupled system are as shown in Figure 4.
The then differential equation of motion of two free systems are as follows:
Due to the support stiffness k of shake table2To be much smaller than the rigidity k of bearing1, relative to k1K can be set2≈0.Then formula
(1) it can simplify are as follows:
Two intrinsic frequencies of system can be acquired by equation (2) are as follows:
ω1=3Hz (isolation frequency of shake table),
Due to m2>>m1, thenRelative toIt can setTherefore, the intrinsic frequency of systemThen
After bearing is selected, rigidity k1It is determining, therefore m can be reduced by changing the outer dimension of leaf dish1Matter
Amount, the intrinsic frequency of Lai Tigao system.
Again according to centrifugal force formula (3):
F=m ω2r (3)
In formula, m-blade quality；
Distance of the r-vane centroid to leaf dish rotation center；
ω-leaf dish angular velocity of rotation；
Centrifugal force suffered by F-blade.
It can be deduced by the analysis of the Equivalent Mechanical Model of above-mentioned coupled system, guarantee the constant situation of centrifugal force
Under, the rotation speed ω of increase leaf dish 2 can reduce 3 mass center of blade to the distance r of 2 rotation center of leaf dish, so as to reduce
The radius of leaf dish 2 realizes the intrinsic frequency of raising system.Therefore, using centrifugal force equivalent test method, guaranteeing rotation speed
In controlled range, the rotation speed of leaf dish 2 is improved, reduces 2 radius of leaf dish, can reduce the quality of leaf dish 2.Therefore, pass through
Reduce 2 radius of leaf dish to improve the intrinsic frequency of system, is more advantageous to the reliability and transmission efficiency for guaranteeing whole system.This reality
The diameter dimension for applying leaf dish 2 in example is 150mm-300mm, during the test should be according to the determination of the Sizes of blade 3
The size of leaf dish 2.
Referring to Fig.1,1 upper cover of shake table is equipped with shield 11, and leaf dish 2 and whole blades 3 are respectively positioned on shield 11
It is internal.To the security risk of operator when shield 11 can reduce 3 high speed rotation of leaf dish 2 and blade, can play preferably
Security protection effect.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (8)
1. it is a kind of vibration plus centrifugal compound fatigue rig, for blade fatigue test, which is characterized in that including shake table,
Leaf dish and the force piece for driving the blade；The blade is embedded in the leaf dish, and the leaf dish can be in the force piece
Driving under drive the blade to rotate, the centrifugal load born to simulate the blade；The leaf dish passes through bearing assembly
It is connect with the shake table, vibration force is passed into the blade.
2. vibration as described in claim 1 plus centrifugal compound fatigue rig, which is characterized in that the diameter of the leaf dish is
150mm-300mm。
3. vibration as described in claim 1 plus centrifugal compound fatigue rig, which is characterized in that the rotary shaft of the leaf dish
Line is arranged along the vertical direction.
4. vibration as claimed in claim 3 plus centrifugal compound fatigue rig, which is characterized in that the rotary shaft of the leaf dish
The vibration axis collinear of line and the shake table.
5. vibration as described in claim 1 plus centrifugal compound fatigue rig, which is characterized in that the force piece passes through height
Fast flexible clutch is connect with the leaf dish.
6. vibration as described in claim 1 plus centrifugal compound fatigue rig, which is characterized in that the vibration plus centrifugation are multiple
Closing fatigue rig further includes portal frame, and the force piece is fixed on the portal frame.
7. vibration as claimed in claim 6 plus centrifugal compound fatigue rig, which is characterized in that the bearing assembly includes
Bearing block and high-speed bearing, the bearing block are rotatablely connected by the high-speed bearing and the leaf dish, and the bearing block passes through
Mounting bracket is fixedly connected with the shake table.
8. vibration as described in claim 1 plus centrifugal compound fatigue rig, which is characterized in that the shake table upper cover is set
There is shield, the leaf dish and the blade are arranged inside the shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309330.1A CN110006642A (en) | 2019-04-17 | 2019-04-17 | A kind of vibrate adds centrifugal compound fatigue rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910309330.1A CN110006642A (en) | 2019-04-17 | 2019-04-17 | A kind of vibrate adds centrifugal compound fatigue rig |
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| Publication Number | Publication Date |
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| CN110006642A true CN110006642A (en) | 2019-07-12 |
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| CN201910309330.1A Pending CN110006642A (en) | 2019-04-17 | 2019-04-17 | A kind of vibrate adds centrifugal compound fatigue rig |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855216A (en) * | 2020-08-21 | 2020-10-30 | 中国工程物理研究院总体工程研究所 | Test piece rotary driving device for centrifugal overload test of solid rocket engine |
| CN114323648A (en) * | 2021-11-30 | 2022-04-12 | 北京智束科技有限公司 | Test system for dynamic performance of ball bearing of X-ray tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000227380A (en) * | 1999-02-04 | 2000-08-15 | Mitsubishi Heavy Ind Ltd | Supporting device of vibration stand of centrifugal load- experimenting device |
| JP2008281511A (en) * | 2007-05-14 | 2008-11-20 | Ihi Corp | Shaking table test device |
| CN203203788U (en) * | 2013-03-19 | 2013-09-18 | 徐可君 | Fatigue cycle test apparatus for compressor blade of aeroengine |
| CN104075863A (en) * | 2014-07-21 | 2014-10-01 | 苏州广博力学环境实验室有限公司 | Vibration and centrifugation composite-testing equipment |
| CN104075906A (en) * | 2014-07-21 | 2014-10-01 | 苏州广博力学环境实验室有限公司 | Vibration, centrifugation and climatic environment composite-testing equipment |
| CN106052995A (en) * | 2016-07-11 | 2016-10-26 | 北京航天希尔测试技术有限公司 | Centrifugation electric vibration table system |
| CN106226015A (en) * | 2016-07-01 | 2016-12-14 | 西北工业大学 | A kind of assay device of turbine disk coupled vibrations |
| CN209673347U (en) * | 2019-04-17 | 2019-11-22 | 苏州东菱振动试验仪器有限公司 | A kind of vibrate adds centrifugal compound fatigue rig |
-
2019
- 2019-04-17 CN CN201910309330.1A patent/CN110006642A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000227380A (en) * | 1999-02-04 | 2000-08-15 | Mitsubishi Heavy Ind Ltd | Supporting device of vibration stand of centrifugal load- experimenting device |
| JP2008281511A (en) * | 2007-05-14 | 2008-11-20 | Ihi Corp | Shaking table test device |
| CN203203788U (en) * | 2013-03-19 | 2013-09-18 | 徐可君 | Fatigue cycle test apparatus for compressor blade of aeroengine |
| CN104075863A (en) * | 2014-07-21 | 2014-10-01 | 苏州广博力学环境实验室有限公司 | Vibration and centrifugation composite-testing equipment |
| CN104075906A (en) * | 2014-07-21 | 2014-10-01 | 苏州广博力学环境实验室有限公司 | Vibration, centrifugation and climatic environment composite-testing equipment |
| CN106226015A (en) * | 2016-07-01 | 2016-12-14 | 西北工业大学 | A kind of assay device of turbine disk coupled vibrations |
| CN106052995A (en) * | 2016-07-11 | 2016-10-26 | 北京航天希尔测试技术有限公司 | Centrifugation electric vibration table system |
| CN209673347U (en) * | 2019-04-17 | 2019-11-22 | 苏州东菱振动试验仪器有限公司 | A kind of vibrate adds centrifugal compound fatigue rig |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855216A (en) * | 2020-08-21 | 2020-10-30 | 中国工程物理研究院总体工程研究所 | Test piece rotary driving device for centrifugal overload test of solid rocket engine |
| CN114323648A (en) * | 2021-11-30 | 2022-04-12 | 北京智束科技有限公司 | Test system for dynamic performance of ball bearing of X-ray tube |
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