CN106840562A - With the split type shielding fixture and method in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine - Google Patents
With the split type shielding fixture and method in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine Download PDFInfo
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- CN106840562A CN106840562A CN201710012508.7A CN201710012508A CN106840562A CN 106840562 A CN106840562 A CN 106840562A CN 201710012508 A CN201710012508 A CN 201710012508A CN 106840562 A CN106840562 A CN 106840562A
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- 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
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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Abstract
The present invention relates in a kind of turbomachine with the split type shielding fixture and method in tenon blade high-temperature vibrating fatigue test.The test fixture mainly includes two large divisions：Water-cooling base and tongue-and-groove holder part, its middle tenon groove holder part include tongue-and-groove seat and two tongue-and-groove seat limited blocks, additionally including the heat-insulated asbestos pad between shake table and water-cooling base.Water-cooling chassis interior is provided with cooling-water duct, and vibration mechine is fixed on by four bolts, between the two plus asbestos pad, in order to strengthen effect of heat insulation, four heat dams is milled out on the upper and lower surface of heat dissipation base, reduces transmission of heat by contact area；Tongue-and-groove seat is connected by four bolts with water-cooling base, and bolt is connected to vibration table through tongue-and-groove seat and water-cooling base, and the limited block of both sides is fixed on tongue-and-groove seat both sides, prevents blade tenon from breakking away by cross bolts.The fixture can efficiently transmit the vibration of shake table, and can at utmost reduce heat to shake table conduction.
Description
Technical field
The invention belongs to impeller machinery technical field, band tenon blade high-temperature vibrating in more particularly to a kind of turbomachine
Split type shielding fixture and method in fatigue test.
Background technology
Turbo blade is one of very important parts in turbomachine, and high-temperature vibrating wear-out failure is its common mistake
Effect pattern, it is therefore desirable to carry out high-temperature vibrating fatigue test for the type blade to determine its safe operating life.In order to incite somebody to action
The vibration of shake table is efficiently delivered to blade, and at utmost reduces experiment Leaf heat to shake table conduction, it is necessary to set
A kind of efficient biography of meter is shaken, heat-insulated vibration test fixture.
In laboratory conditions, vibration test is typically carried out on a vibration table.The size of vibration table surface is limited, platform
The specification and quantity of the fixing screwed hole (Fig. 3) on face are also limited, therefore are all by fixture clamping to shake table by test specimen
On table top.Due to connecting shake table and test specimen using fixture, the vibration of shake table and energy can not be transmitted directly
Onto test specimen, but first pass on fixture, then be delivered on test specimen by fixture, thus the biography performance of shaking of fixture is straight
Connect influence test effect；Blade vibration experimental condition is usually 700-800 DEG C, and the safe working temperature of shake table is generally 80
Below DEG C, the heat of blade is also first to be transmitted to fixture, then is transmitted to shake table, in order to ensure the safe and reliable of shake table, must
Design on thermal insulation must be carried out on fixture.Therefore the jig Design of vibration test is a ring critically important in entirely testing, and is also included
The manufacture and installation of fixture.
The content of the invention
The technical problem to be solved in the present invention is：For high-temperature vibrating experiment, for the energy efficient for providing shake table is passed
Testpieces is delivered to, and can well step up testpieces, prevent loosening occur in process of the test；To prevent shake table overtemperature, it is right to need
Shake table is thermally shielded, and temperature is down to below safe temperature during by shaketalle test；Different leaves vibration test needs different
Fixture is, it is necessary to repeatedly process integral clamp, split-type design reduces the workload of fixture processing.
The present invention solve above-mentioned technical problem use technical scheme be：Band tenon blade high temperature shakes in a kind of turbomachine
Split type shielding fixture in dynamic fatigue test, including：Tongue-and-groove seat, water-cooling base, the first limited block, the second limited block and
Asbestos pad；Wherein, 4 bolts on water-cooling base are connected with shake table, and four bolts on tongue-and-groove seat dissipate through water-cooled
Hot base is connected with shake table, and water-cooling base and tongue-and-groove seat are all fixed on vibration mechine, and blade tenon is installed
To after tongue-and-groove seat, the limited block of both sides is fixed with two stay bolts through tongue-and-groove seat.
Wherein, the material of the water-cooling base be aluminium alloy, limited block and tongue-and-groove seat material be stainless steel.
Wherein, four sides of water-cooling base are respectively provided with 3 cooling water holes, and cooling-water duct is by heat dissipation base
Opened hole is formed, and unwanted cooling water hole in experiment is clogged with waterproof plug；The upper and lower surface of water-cooling seat respectively mills out 4
Rectangle heat dam：Heat transfer contact area is reduced, radiating can be assisted to air blast in groove when radiating is not enough.
Wherein, heat-insulated asbestos pad is added between water-cooling base and shake table, if necessary in tongue-and-groove seat and water-cooling seat
Between add heat-insulated asbestos pad.
Wherein, all bolts should all install spring shim additional in fixture, bolt looseness when preventing vibration test；It is non-complete on screw rod
Screw thread, screw rod be polished rod through fixture and fixture intersection, be threaded rod with shake table coupling part.
In addition, a kind of carry out the side with tenon blade high-temperature vibrating fatigue test in turbomachine using above-mentioned fixture
Method, the method comprises the following steps：
Water-cooling base is fixed on shake table, shake table and water-cooled by step (1) with 4 bolts with spring washer
Install heat-insulated asbestos pad between seat additional, choose manhole appendix of the suitable cooling water hole as cooling water, remaining hole is clogged with waterproof plug；
With 4 bolts with spring washer be fixed on shake table tongue-and-groove seat through water-cooling base by step (2),
And pilot blade is installed；
Limited block is installed to tongue-and-groove seat both sides by step (3) with the bolt with spring washer；
Step (4) is passed through cooling water, and blade is heated with electromagnetic induction coil, is vibrated according to test load spectrum
Fatigue test；
After step (5) off-test, induction coil and shake table power supply are cut off, unload lower position block and tongue-and-groove seat, changed not
Follow-up test is carried out to other blades with tongue-and-groove seat.
Principle of the invention is：
Shaken to ensure that shake table is efficiently passed, using specific stiffness (elastic modulus E of material and density of material ρ during design fixture
Ratio) big material, material requirements " light and hard ", tongue-and-groove seat and limited block part use stainless steel material, and blade is constrained respectively
The displacement of vertical table-board and the displacement of parallel table top, while taking into account radiating effect, heat dissipation base uses aluminium alloy；Heat dissipation base
In be provided with cooling water channel, heat is taken away by cooling water in experiment, in order to further enhance effect of heat insulation, in water-cooling base
One layer of heat-insulated asbestos are clamped and shake table between, and radiating rectangular channel is milled out respectively in water-cooling base upper and lower surface；Using
Split-type design, wherein water-cooling base and limited block can be reused, and the blade for different tenon forms is tried
When testing, tongue-and-groove seat need to be only re-worked.
The present invention has advantages below compared with prior art：
(1) fixture light weight, specific stiffness is big, and vibration transmission efficiency is high；
(2) using water-cooling is heat-insulated, asbestos 5 and the heat-insulated mode of the physics of heat dam 19 between shake table and testpieces to entering
Row is heat-insulated, enhances effect of heat insulation；
(3) fixture uses split-type design, with wider applicability, greatly reduces test fixture manufacture processed
The workload of journey, helps speed up test process.
Brief description of the drawings
Fig. 1 is with the split type shielding fixture in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine of the invention
Dimensional structure diagram；
Fig. 2 be water-cooling base and cooling water channel schematic diagram, wherein, Fig. 2 (a) be water-cooling base schematic diagram, Fig. 2
B () is cooling water channel schematic diagram；
Fig. 3 is vibration table bolthole circle；
Fig. 4 is with the split type shielding fixture in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine of the invention
Front view；
Fig. 5 is with the split type shielding fixture in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine of the invention
Top view；
Fig. 6 is with the split type heat insulation clamps in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine of the invention
Tool；
Symbol description is as follows in figure：
1：Tongue-and-groove seat 11：Second tongue-and-groove seat bolt hole
2：Water-cooling subbase 12：3rd tongue-and-groove seat bolt hole
3：First limited block 13：4th tongue-and-groove seat bolt hole
4：Second limited block 14：First limited block bolt hole
5：Asbestos pad 15：Second limited block bolt hole
6：First water-cooling subbase bolt hole 16：First cooling water hole
7：Second water-cooling subbase bolt hole 17：Second cooling water hole
8：3rd water-cooling subbase bolt hole 18：3rd cooling water hole
9：4th water-cooling subbase bolt hole 19：Heat dam
10：First tongue-and-groove seat bolt hole
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment further illustrates the present invention.
1. clamp structure is designed and performance verification
As shown in figure 1, in a kind of turbomachine of the invention with tenon blade high-temperature vibrating fatigue test in it is split type every
Hot fixture, including tongue-and-groove seat 1, water-cooling subbase 2, the first limited block 3, the second limited block 4 and asbestos pad 5.4 bolts pass through water-cooled
Heat dissipation base is by the first water-cooling subbase bolt hole 6, the second water-cooling subbase bolt hole 7, the 3rd water-cooling subbase bolt at corner
Hole 8, the 4th water-cooling subbase bolt hole 9 are connected with shake table, 4 bolts through the first tongue-and-groove seat bolt hole 10 on tongue-and-groove seat,
It is then passed through water-cooling subbase 2 and shakes after second tongue-and-groove seat bolt hole 11, the 3rd tongue-and-groove seat bolt hole 12, the 4th tongue-and-groove seat bolt hole 13
Dynamic platform is connected, and two cross bolts are connected two limited blocks through the bolt hole 14,15 on limited block and tongue-and-groove seat with nut
It is fixed on tongue-and-groove seat both sides：Blade tenon is inserted sideways in tongue-and-groove seat, and limited block prevents it from breakking away.Water-cooling base four
Respectively there are three cooling water holes individual side, such as positive first cooling water hole 16, the second cooling water hole 17, the 3rd cooling water hole
18, according to actual tests room situation determine cooling water into and out of water hole.The upper and lower surface of water-cooling base mills out two respectively
Horizontal two indulge four heat dams 19, and purpose is reduction transmission of heat by contact area.
With reference to the quantity of the position of experiment table top (Fig. 3) upper bolt hole of vibration test, selection is near shake table central part
The a number of bolt hole of position fixes required bolt hole as fixture, and present clip have chosen positioned at shake table center
Fixation and positioning bolt hole of 8 bolts hole as fixture (square is indicated in Fig. 3).Computer simulation fixture is carried out afterwards to set
Meter, for the fixture that design is completed, the test of fixture is carried out using Finite Element：Model analysis is carried out by fixture, is obtained
To its first natural frequency, its vibration carry-over factor is analyzed according to material property, be that the adjustment of shake table power is carried in process of the test
For reference, shaken effect with reaching satisfied biography.
2. fixture processing and test
For the fixture for having machined, before shaketalle test is carried out, fixture need to be placed in resistant to elevated temperatures
The enterprising trip temperature test in face, water-cooling subbase is passed through cooling water, blade to be measured is installed on fixture and is incited somebody to action with electromagnetic induction coil
Whether blade is heated to test temperature, and high temperature resistant table top temperature is measured after a period of time, met with the effect of heat insulation for verifying fixture
Shake table safety test demand.
3. vibration test is carried out
(1) fixed water-cooling base
The bolt with spring washer that fixed water-cooling base is used, is sequentially inserted into four fixations on water-cooling subbase
In hole 6,7,8,9, screw rod is polished rod with base intersection, and thread segment is screwed into shake table.Using diagonal peace when bolt is fixed
The order of dress installs four bolts successively, again successively tightens bolt reinforcing by diagonal order after bolt is screwed into successively.
(2) fixed tongue-and-groove seat
Fixed tongue-and-groove seat is sequentially inserted into tongue-and-groove upper 4 fixing holes 10,11,12,13 of seat using the bolt with spring washer
In, screw rod is polished rod with fixture intersection, and thread segment is screwed into shake table.Bolt is screwed into and reinforcing order and the spiral shell of water-cooling subbase
Bolt is identical.Can again add one layer of heat-insulated asbestos between effect of heat insulation, then tongue-and-groove seat and heat dissipation base according to demand to strengthen.
(3) blade is installed
Blade is inserted along tongue-and-groove seat upper tenon groove orientation.Electromagnetic induction heating coil is installed additional the position of heating is needed.
(4) limited block on tongue-and-groove seat is installed
Using the bolt with spring washer, it is sequentially inserted into the fixing hole 14,15 of limited block and tongue-and-groove seat, screw rod and tenon
Groove seat and limited block intersection are polished rod, and limited block opposite side is fixed with nut, successively twist nut reinforcing after nut of screwing on
Fasten.In order to prevent nut from being loosened in vibration test, insurance is played after nut screwing clamping.
(5) access cooling water pipe and be passed through cooling water
Appropriate cooling water hole is selected as the import and export of cooling water according to test site and cooling water pipeline is accessed, with not
To cooling water hole clogged with stopper；Cooling water pipe joint axis direction should be consistent with the vibration displacement direction of shake table, if
Cooling water pipe is long, should be coiled into spring shape, prevents the pipe joint for cooling water occur during vibration test from loosening leak.
(6) shake table parameter is set and starts vibration test
(7) off-test
Shake table is first closed in off-test, disconnects electromagnetic induction coil, is first unloaded on lower position block after fixture is cooled down completely
Bolt, remove blade, unloaded if it need to carry out the vibration test of next blade tongue-and-groove seat on 4 bolts, more renew
Tongue-and-groove seat, repeats above-mentioned test operation.
Non-elaborated part of the present invention belongs to techniques well known.
The above, part specific embodiment only of the present invention, but protection scope of the present invention is not limited thereto, and appoints
What those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.
Claims (6)
1. with the split type shielding fixture in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine, it is characterised in that
Including：Tongue-and-groove seat (1), water-cooling base (2), the first limited block (3), the second limited block (4) and asbestos pad (5)；Wherein, water
4 bolts on cold heat dissipation base are connected with shake table, and four bolts on tongue-and-groove seat pass through water-cooling base and shake table
It is connected, water-cooling base and tongue-and-groove seat is all fixed on vibration mechine, blade tenon is installed to after tongue-and-groove seat, will
The limited block of both sides is fixed with two stay bolts through tongue-and-groove seat.
2. in a kind of turbomachine according to claim 1 with tenon blade high-temperature vibrating fatigue test it is split type every
Hot fixture, it is characterised in that：The material of the water-cooling base is aluminium alloy, and the material of limited block and tongue-and-groove seat is for stainless
Steel.
3. in a kind of turbomachine according to claim 1 with tenon blade high-temperature vibrating fatigue test it is split type every
Hot fixture, it is characterised in that：Four sides of water-cooling base are respectively provided with 3 cooling water holes, and cooling-water duct is by radiating
Opened hole is formed in base, and unwanted cooling water hole in experiment is clogged with waterproof plug；The upper and lower surface of water-cooling seat is each
Mill out 4 rectangle heat dams：Heat transfer contact area is reduced, radiating can be assisted to air blast in groove when radiating is not enough.
4. in a kind of turbomachine according to claim 1 with tenon blade high-temperature vibrating fatigue test it is split type every
Hot fixture, it is characterised in that：Add heat-insulated asbestos pad between water-cooling base and shake table, dissipated in tongue-and-groove seat and water-cooled if necessary
Heat-insulated asbestos pad is added between hot seat.
5. in a kind of turbomachine according to claim 1 with tenon blade high-temperature vibrating fatigue test it is split type every
Hot fixture, it is characterised in that：All bolts should all install spring shim additional in fixture, bolt looseness when preventing vibration test；Screw rod
Upper non-full thread, screw rod be polished rod through fixture and fixture intersection, be threaded rod with shake table coupling part.
6. a kind of fixture using described in claim 1 carries out the side with tenon blade high-temperature vibrating fatigue test in turbomachine
Method, it is characterised in that the method comprises the following steps：
Water-cooling base is fixed on shake table by step (1) with 4 bolts with spring washer, shake table and Water-cooling seat it
Between install heat-insulated asbestos pad additional, choose manhole appendix of the suitable cooling water hole as cooling water, remaining hole is clogged with waterproof plug；
With 4 bolts with spring washer be fixed on shake table tongue-and-groove seat through water-cooling base by step (2), and is pacified
Dress pilot blade；
Limited block is installed to tongue-and-groove seat both sides by step (3) with the bolt with spring washer；
Step (4) is passed through cooling water, and blade is heated with electromagnetic induction coil, and vibrating fatigue is carried out according to test load spectrum
Experiment；
After step (5) off-test, induction coil and shake table power supply are cut off, unload lower position block and tongue-and-groove seat, change different tenons
Groove seat carries out follow-up test to other blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012508.7A CN106840562B (en) | 2017-01-09 | 2017-01-09 | With the split type shielding fixture and method in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012508.7A CN106840562B (en) | 2017-01-09 | 2017-01-09 | With the split type shielding fixture and method in tenon blade high-temperature vibrating fatigue test in a kind of turbomachine |
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| CN106840562A true CN106840562A (en) | 2017-06-13 |
| CN106840562B CN106840562B (en) | 2018-12-04 |
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Cited By (8)
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| CN107314932A (en) * | 2017-06-16 | 2017-11-03 | 河海大学 | Modularization fatigue test place and corollary apparatus, fatigue test method |
| CN108393818A (en) * | 2018-01-16 | 2018-08-14 | 中国航发贵州黎阳航空动力有限公司 | A kind of compressor arc tooth vibration of rotor blades fatigue test clamper |
| CN108519225A (en) * | 2018-03-19 | 2018-09-11 | 江苏大学 | A kind of detection device and method of blade of aviation engine high-temperature vibrating fatigue properties |
| CN109827735A (en) * | 2019-04-02 | 2019-05-31 | 湘潭大学 | A kind of high-temperature vibrating analog machine |
| CN110530590A (en) * | 2019-07-02 | 2019-12-03 | 东北大学 | A kind of turbine blade vibration test experimental bed considering more contact conditions |
| CN111024349A (en) * | 2019-12-23 | 2020-04-17 | 北京工业大学 | High-temperature multi-axis vibration fatigue test method |
| CN114720170A (en) * | 2022-06-10 | 2022-07-08 | 中国飞机强度研究所 | Temperature control device and method for clamp for vibration test of aircraft component in high-temperature environment |
| CN114791347A (en) * | 2022-06-23 | 2022-07-26 | 中国飞机强度研究所 | Response control method based on mapping correction in high-temperature vibration fatigue test of airplane |
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| CN108519225A (en) * | 2018-03-19 | 2018-09-11 | 江苏大学 | A kind of detection device and method of blade of aviation engine high-temperature vibrating fatigue properties |
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| CN110530590A (en) * | 2019-07-02 | 2019-12-03 | 东北大学 | A kind of turbine blade vibration test experimental bed considering more contact conditions |
| CN111024349A (en) * | 2019-12-23 | 2020-04-17 | 北京工业大学 | High-temperature multi-axis vibration fatigue test method |
| CN114720170A (en) * | 2022-06-10 | 2022-07-08 | 中国飞机强度研究所 | Temperature control device and method for clamp for vibration test of aircraft component in high-temperature environment |
| CN114791347A (en) * | 2022-06-23 | 2022-07-26 | 中国飞机强度研究所 | Response control method based on mapping correction in high-temperature vibration fatigue test of airplane |
| CN114791347B (en) * | 2022-06-23 | 2022-09-02 | 中国飞机强度研究所 | Response control method based on mapping correction in high-temperature vibration fatigue test of airplane |
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