CN201382883Y - Turbine disk/blade joggle joint high-temperature composite fatigue loading device - Google Patents
Turbine disk/blade joggle joint high-temperature composite fatigue loading device Download PDFInfo
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- CN201382883Y CN201382883Y CN200920105201U CN200920105201U CN201382883Y CN 201382883 Y CN201382883 Y CN 201382883Y CN 200920105201 U CN200920105201 U CN 200920105201U CN 200920105201 U CN200920105201 U CN 200920105201U CN 201382883 Y CN201382883 Y CN 201382883Y
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- boosting mechanism
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Abstract
A turbine disk/blade joggle joint high-temperature composite fatigue loading device consists of a low-cycle loading boosting mechanism, power transmission pins, a power transmission main tension board, power transmission pushing boards, a power transmission circular rod, a blade clamp, rolling bearings, hold down bolts, a high-cycle transmission board, a high-frequency heating ring and a vibration exciter. The low-cycle loading boosting mechanism is connected with the power transmission main tension board through the power transmission pins, the power transmission main tension board is connected with the power transmission circular rod through the rolling bearings, the lower end of each power transmission pushing board is sleeved on the power transmission circular rod, the upper end of each power transmission pushing board is connected with a bearing convex lug of the blade clamp through the rolling bearings, the blade clamp is connected with turbine blades through the hold down bolts, a turbine disk is connected with the low-cycle loading boosting mechanism through the power transmission pins, the high-cycle transmission board is connected with the blade clamp through the hold down bolts, and the vibration exciter is located on one side above the high-cycle loading transmission board. A loading method includes backwardly moving a point of application of force of a low-cycle load, enabling a small high-cycle load to be smoothly transmitted to a joggle joint position and reasonably distributed along tenon teeth stress, and then resolving the problem of mutually interference of composite loads.
Description
(1) technical field
The utility model relates to a kind of charger on the aeromotor parts, particularly relates to a kind of turbine disk/compound fatigue loading device of blade joggle high temperature, belongs to field of aerospace technology.
(2) background technology
Aero-engine turbine disk and turbo blade adopt the fir-tree type joggle usually, and the reliability of mortise structure is the bottleneck of restrict aircraft and engine life and safe reliability.Its reason is that turbine disk tongue-and-groove/blade tenon tooth is that stress is concentrated the position, very easily cracks, and scraps after the lighter's crackle is above standard; Weight person causes blade out of joint, causes a serious accident.The crackle character at joggle position belongs to the compound fatigue of the little load of the big load of low frequency (being mainly centrifugal force) overlapped high-frequency (being mainly high all bending blade oscillating loads) under the high temperature.Therefore adopting the true turbine disk/blade to carry out high temperature height Zhou Fuhe torture test is the necessary means of guaranteeing the safe and reliable work of aero-turbine parts.Classic method is the problem that the true turbine disk/blade joggle position applies the high temperature combined load: when applying the centrifugal big load of low frequency on exerciser, the little load of dither is not easy successfully to pass to the joggle place and along the reasonable distributed stress of each tenon tooth; There is the phase mutual interference of height Zhou Zaihe simultaneously, is difficult to reproduce the real load state.
(3) summary of the invention
1, purpose: the purpose of this utility model provides a kind of turbine disk/compound fatigue loading device of blade joggle high temperature, it has overcome the deficiencies in the prior art, preferably resolve the difficult point that the compound fatigue load of true turbine joggle position high temperature applies, thereby, guarantee that aero-turbine parts high temperature height Zhou Fuhe torture test is smooth, for the safe and reliable work of aeromotor provides technical foundation and safety guarantee.
2, technical scheme:
A kind of turbine disk of the utility model/compound fatigue loading device of blade joggle high temperature, this device by low Zhou Zaihe go up boosting mechanism under boosting mechanism, the low Zhou Zaihe, go up the power transmission pin, heat circle, vibrator of power transmission pin, power transmission main pulling force plate, left power transmission top board, right power transmission top board, power transmission pole, blade fixture, rolling bearing 1, rolling bearing 2, hold-down bolt 1, hold-down bolt 2, high all load transmission plate, high-frequency induction formed down.Low Zhou Zaihe goes up boosting mechanism and links to each other by last power transmission pin with power transmission main pulling force plate; Power transmission main pulling force plate links to each other by a pair of rolling bearing 1 with the power transmission pole; The lower end of left and right power transmission top board is sleeved on the power transmission pole, and the upper end is connected by a pair of rolling bearing 2 with the load lug of blade fixture; Each load lug in two, respectively with upper and lower two cast solids of blade fixture; Upper and lower two inner chambers of blade fixture carry out accurate digital control processing by the leaf basin and the blade back profile data of test turbo blade respectively, and are connected with turbo blade by four hold-down bolts 1; The power transmission pin linked to each other with boosting mechanism under the low Zhou Zaihe under the turbine disk passed through, and boosting mechanism is fixed on the fatigue tester under the low Zhou Zaihe; High all load transmission plate link to each other with blade fixture by six hold-down bolts 2; Vibrator is positioned at top one side of high all load transmission plate.
Principle of the present utility model and flow process are: the low Zhou Zaihe point of application moves to the tongue-and-groove rear by last power transmission pin after by power transmission main pulling force plate, be pushed into load lug on the blade fixture by power transmission pole and left and right power transmission top board from the rear then on.And, on left and right power transmission top board and load lug, add a pair of rolling bearing 2, like this when guaranteeing the low fine transmission of Zhou Zaihe, make the sliding friction on the load lug become rolling friction, friction factor has reduced by two orders of magnitude, and the oscillating load that vibrator produces can overcome the force of rolling friction on the load lug face at an easy rate.So can successfully pass on the tenon tooth of true turbine disk tongue-and-groove and blade in the little load of dither under the situation of not suffering a loss basically.For further reducing the transmission resistance of high all exciting forces, cover adds another to rolling bearing 1 on power transmission main pulling force plate and power transmission pole, and the power requirement to vibrator can descend significantly like this.
Oscillating load is provided by electromagnetic exciter, realizes the change of different vibration frequencies with frequency converter.Regulate the amplitude of exciting point by the size in control vibrator gap, so that dither load accurately to be provided.High Zhou Zaihe is applied on the blade fixture by transmission plate, thereby successfully passes to the joggle place of the turbine disk/blade.
Owing to adopt real blade to test, two inner chambers up and down of blade fixture carry out accurate digital control processing by test turbo blade leaf basin and blade back profile data respectively.During test,, the big centrifugal load of blade applies, promptly to the method loading of the pulling force of joggle by this friction clamping thereby mainly compressing the mode that two clamping plate clamp blades by four bolts.This load mode can be simulated the stress form of blade centrifugal force well, and the centrifugal big load of low frequency on the maintenance blade is with high fidelity to the joggle transmission.
Adopt high frequency induction heater control high temperature to respond to the coil of heating, realize local warming the turbine disk.
The loading method of a kind of turbine disk/compound fatigue loading device of blade joggle high temperature, by changing the transfer route of low Zhou Zaihe, move behind the point of application with low Zhou Zaihe, guaranteeing that the little load of dither is delivered to joggle smoothly and in the reasonable distributed stress of each tenon tooth, solving the mutual interference problem of height Zhou Zaihe dexterously like this.The compound fatigue load of high temperature is the high all loading spectrums of stack on low Zhou Zaihe basis, and high and low Zhou Zaihe applies simultaneously, and heats earlier before on-test and kept 40 minutes.
These method concrete steps are as follows:
(1) applying of high temperature:
Heating system mainly is made up of high-frequency induction furnace, pointer potential difference (PD) millivoltmeter, thermopair, computer system etc.Adopt high frequency induction heater, spot heating around wheel disc test tongue-and-groove, thermocouple temperature measurement.Use this method, under the little situation of voltage and current, can add to 550 ℃ ± 10 ℃ in ten minutes, and keep constant temperature, along the essentially no thermograde of tongue-and-groove thickness direction.Prevent that high-frequency induction furnace from the electric current and voltage drift occurring and causing the unsettled phenomenon of heating after a period of time of heating, set up a cover automatic warming system, realize carrying out temperature control by microcomputer.Thermopair output temperature signal by amplifier after A/D conversion, carry out data acquisition by computing machine, output bias amount after the calculation process, after D/A conversion, amplifier amplify, the temperature output regulating system of control coreless induction furnace, the power output of coreless induction furnace is changed near the numerical value of program setting, thereby the temperature on the test specimen is controlled in the temperature range of testing requirements.Present control accuracy is ± 5-10 ℃, and high-frequency peak power is output as 60KW.
(2) applying of low Zhou Zaihe:
The centrifugal big load of low frequency is produced by the luxuriant and rich with fragrance wheels exerciser that can carry out the full-scale low cycle fatigue test of engine turbine disk, programmed control electrohydraulic servo valve in the computing machine, be loaded into synchronously on the low Zhou Zaihe boosting mechanism by the hydraulic actuator on the exerciser, then push away and be added on the blade fixture by two pairs of rolling bearings on the load lug on power transmission top board and the blade fixture, power transmission main pulling force plate and the power transmission pole, utilize the friction force between blade fixture and turbo blade profile liner to be delivered on the turbo blade, thereby be delivered to the turbine disk/blade joggle place smoothly.Can adopt a plurality of hydraulic cylinders that the turbine disk is carried out multiaxis and load synchronously, simulation turbine disk actual working state.Exerciser can be tested the wheel disc that diameter is no more than 500mm, and 38 pressurized struts can be installed at the most, and each pressurized strut all can apply the stepless adjustable load of 0-100KN, and the position can be determined arbitrarily in 360 degree scopes.Electrohydraulic servo system is the critical piece of real-time control break hydraulic load, and loading spectrum waveforms such as can realizing trapezoidal wave, triangular wave computerizeds control.The rated pressure 210Kg/cm of this system
2, flow Q=60L/min, fuel feeding hang power scope 0-210Kg/cm
2, rated current I=± 30mA, frequency characteristic is less than 60Hz, and flow tolerance ± 10%Q requires fuel feeding filtering accuracy 10-15 μ m.
(3) applying of high Zhou Zaihe:
The little load of dither is provided by electromagnetic exciter, comprises two kinds of frequencies of 50Hz and 100Hz, realizes the change of different vibration frequencies with frequency converter.Exciting point is apart from the about 255mm of turbo blade root, and the double amplitude at exciting point place is measured with ZZF6-1 type eddy current displacement vibration amplitude measuring instrument.It is 8mm that vibration frequency keeps the vibrator gap during for 50Hz, and at this moment, exciting point double amplitude is 5mm; It is 4mm that vibration frequency keeps the gap during for 100Hz, and exciting point double amplitude is 2.5mm.Like this, oscillating load is applied on the blade fixture by all load transmission plate of height, thereby successfully passes to the joggle place of the turbine disk/blade.Calibration result shows that the oscillating load that reaches on tongue-and-groove first tenon tooth under two kinds of frequency ratios is basic identical.
3, advantage and effect:
The utility model changes the sliding friction that produces in the little loading transfer process of dither into rolling friction, reduced resistance, thereby successfully with all loading transfer of height to tongue-and-groove/tenon tooth place and the dynamic calibration result show along each tenon tooth stress distribution reasonable, it has solved the mutual interference problem of height Zhou Zaihe dexterously, makes the stress of the turbine disk/blade joggle meet the real work state.Test examples has reproduced turbine disk joggle outfield fault mode, and the life-span that obtains is consistent with the outfield life-span.The utility model is significant for the safe and reliable work of guaranteeing the aero-turbine parts.
(4) description of drawings
Fig. 1 is the front view of the utility model charger
Fig. 2 is the left view of the utility model charger
The loading spectrum that Fig. 3 uses for the utility model demonstration test
Symbol description is as follows among the figure:
1. power transmission pin 3. power transmission main pulling force plates 4. hold-down bolts 15. blade fixtures 6. left power transmission top board 7. high-frequency inductions are heated and are enclosed 18. times power transmission pins of boosting mechanism, 19. vibrator F load (ton) under 8. rolling bearings, 1 9. power transmission poles, 10. right power transmission top board 11. turbine disks 12. rolling bearings 2 13. turbo blades 14. hold-down bolts 2 15. high all load transmission plate 16. exciting points 17. low Zhou Zaihe on the last boosting mechanism 2. of low Zhou Zaihe; T (s) time (second); O-A-B-C hangs down all loading spectrums, trapezoidal wave; The high Zhou Xunhuan of P; T temperature (degree).
(5) embodiment
See Fig. 1, Fig. 2, shown in Figure 3, a kind of turbine disk of the utility model/compound fatigue loading device of blade joggle high temperature, specifically implement as follows:
A kind of turbine disk of the utility model/compound fatigue loading device of blade joggle high temperature, this device by low Zhou Zaihe go up boosting mechanism 1, go up power transmission pin 2, power transmission main pulling force plate 3, hold-down bolt 4, blade fixture 5, left power transmission top board 6, high-frequency induction are heated circle 7, rolling bearing 8, power transmission pole 9, right power transmission top board 10, rolling bearing 12,, boosting mechanism 17 under the hold-down bolt 14, high all load transmission plate 15, low Zhou Zaihe, power transmission pin 18, vibrator 19 are formed down.
Low Zhou Zaihe goes up boosting mechanism 1 and links to each other by last power transmission pin 2 with power transmission main pulling force plate 3; Power transmission main pulling force plate 3 links to each other by a pair of rolling bearing 8 with power transmission pole 9; The lower end of left and right power transmission top board 6,10 is sleeved on the power transmission pole 9, and the upper end is connected by a pair of rolling bearing 12 with the load lug of blade fixture 5; Each load lug in two, respectively with upper and lower blade fixture 5 cast solids; Upper and lower two inner chambers of blade fixture 5 carry out accurate digital control processing by the leaf basin and the blade back profile data of test turbo blade 13 respectively, and are connected with turbo blade 13 by four hold-down bolts 4; Power transmission pin 18 linked to each other with boosting mechanism 17 under the low Zhou Zaihe under the turbine disk 11 passed through, and boosting mechanism 17 is fixed on the fatigue tester under the low Zhou Zaihe; High all load transmission plate 15 link to each other with blade anchor clamps 5 by six hold-down bolts 14; Vibrator 19 is positioned at top one side of high all load transmission plate 15.
The loading method of a kind of turbine disk/compound fatigue loading device of blade joggle high temperature, by changing the transfer route of low Zhou Zaihe, move behind the point of application with low Zhou Zaihe, guaranteeing that the little load of dither is delivered to joggle smoothly and in the reasonable distributed stress of each tenon tooth, solving the mutual interference problem of height Zhou Zaihe dexterously like this.The compound fatigue load of high temperature is the high all loading spectrums of stack on low Zhou Zaihe basis, and high and low Zhou Zaihe applies simultaneously, and heats earlier before on-test and kept 40 minutes.These method concrete steps are as follows:
(1) applying of high temperature:
Heating system mainly is made up of high-frequency induction furnace, pointer potential difference (PD) millivoltmeter, thermopair, computer system etc.Adopt high frequency induction heater, spot heating around wheel disc test tongue-and-groove, thermocouple temperature measurement.Use this method, under the little situation of voltage and current, can add to 550 ℃ ± 10 ℃ in ten minutes, and keep constant temperature, along the essentially no thermograde of tongue-and-groove thickness direction.Prevent that high-frequency induction furnace from the electric current and voltage drift occurring and causing the unsettled phenomenon of heating after a period of time of heating, set up a cover automatic warming system, realize carrying out temperature control by microcomputer.Thermopair output temperature signal by amplifier after A/D conversion, carry out data acquisition by computing machine, output bias amount after the calculation process, after D/A conversion, amplifier amplify, the temperature output regulating system of control coreless induction furnace, the power output of coreless induction furnace is changed near the numerical value of program setting, thereby the temperature on the test specimen is controlled in the temperature range of testing requirements.Present control accuracy is ± 5-10 ℃, and high-frequency peak power is output as 60KW.
(2) applying of low Zhou Zaihe:
The centrifugal big load of low frequency is produced by the luxuriant and rich with fragrance wheels exerciser that can carry out the full-scale low cycle fatigue test of engine turbine disk, programmed control electrohydraulic servo valve in the computing machine, be loaded into low Zhou Zaihe synchronously by the hydraulic actuator on the exerciser and go up boosting mechanism 1, then by a left side, right power transmission top board 6,10 and blade fixture 5 on the load lug, two pairs of rolling bearings 8 on power transmission main pulling force plate 3 and the power transmission pole 9,12 push away and are added on the blade fixture 5, utilize the friction force between blade fixture 5 and turbo blade 13 profile liners to be delivered on the turbo blade 13, thereby be delivered to the turbine disk/blade joggle place smoothly.Can adopt a plurality of hydraulic cylinders that the turbine disk is carried out multiaxis and load synchronously, simulation turbine disk actual working state.Exerciser can be tested the wheel disc that diameter is no more than 500mm, and 38 pressurized struts can be installed at the most, and each pressurized strut all can apply the stepless adjustable load of 0-100KN, and the position can be determined arbitrarily in 360 degree scopes.Electrohydraulic servo system is the critical piece of real-time control break hydraulic load, and loading spectrum waveforms such as can realizing trapezoidal wave, triangular wave computerizeds control.The rated pressure 210Kg/cm of this system
2, flow Q=60L/min, fuel feeding hang power scope 0-210Kg/cm
2, rated current I=± 30mA, frequency characteristic is less than 60Hz, and flow tolerance ± 10%Q requires fuel feeding filtering accuracy 10-15 μ m.
(3) applying of high Zhou Zaihe:
The little load of dither is provided by vibrator 19, comprises two kinds of frequencies of 50Hz and 100Hz, realizes the change of different vibration frequencies with frequency converter.Exciting point 16 is apart from the about 255mm of turbo blade 13 roots, and exciting is put the double amplitude at 16 places and measured with ZZF6-1 type eddy current displacement vibration amplitude measuring instrument.It is 8mm that vibration frequency keeps the vibrator gap during for 50Hz, and at this moment, it is 5mm that exciting is put 16 double amplitudes; It is 4mm that vibration frequency keeps the gap during for 100Hz, and it is 2.5mm that exciting is put 16 double amplitudes.Like this, oscillating load is applied on the blade fixture 5 by all load transmission plate 15 of height, thereby successfully passes to the joggle place of the turbine disk/blade.Calibration result shows that the oscillating load that reaches on tongue-and-groove first tenon tooth under two kinds of frequency ratios is basic identical.
Claims (1)
1, a kind of turbine disk/compound fatigue loading device of blade joggle high temperature is characterized in that: this device by low Zhou Zaihe go up boosting mechanism under boosting mechanism, the low Zhou Zaihe, go up the power transmission pin, heat circle, vibrator of power transmission pin, power transmission main pulling force plate, left power transmission top board, right power transmission top board, power transmission pole, blade fixture, rolling bearing (1), rolling bearing (2), hold-down bolt (1), hold-down bolt (2), high all load transmission plate, high-frequency induction formed down; Low Zhou Zaihe goes up boosting mechanism and links to each other by last power transmission pin with power transmission main pulling force plate; Power transmission main pulling force plate links to each other by a pair of rolling bearing with the power transmission pole; The lower end of left and right power transmission top board is sleeved on the power transmission pole, and the upper end is connected by a pair of rolling bearing with the load lug of blade fixture; Each load lug in two, respectively with upper and lower blade fixture cast solid; Upper and lower two inner chambers of blade fixture carry out accurate digital control processing by the leaf basin and the blade back profile data of test turbo blade respectively, and are connected with turbo blade by four hold-down bolts; The power transmission pin linked to each other with boosting mechanism under the low Zhou Zaihe under the turbine disk passed through, and boosting mechanism is fixed on the fatigue tester under the low Zhou Zaihe; High all load transmission plate link to each other with the blade anchor clamps by six hold-down bolts; Vibrator is positioned at top one side of high all load transmission plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920105201U CN201382883Y (en) | 2009-01-14 | 2009-01-14 | Turbine disk/blade joggle joint high-temperature composite fatigue loading device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200920105201U CN201382883Y (en) | 2009-01-14 | 2009-01-14 | Turbine disk/blade joggle joint high-temperature composite fatigue loading device |
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| CN201382883Y true CN201382883Y (en) | 2010-01-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592018A (en) * | 2013-11-14 | 2014-02-19 | 北京航空航天大学 | High-low cycle compound fatigue test high-cycle amplitude measuring equipment and method |
| CN107421984A (en) * | 2017-08-31 | 2017-12-01 | 北京航空航天大学 | A kind of hollow turbine vane is superimposed high Zhou Zhendong thermal mechanical fatigue pilot system and method |
| CN109470468A (en) * | 2018-12-29 | 2019-03-15 | 北京航空航天大学 | A kind of height week composite fatigue test fixture of turbine mortise structure |
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
| CN111006950A (en) * | 2019-12-23 | 2020-04-14 | 北京航空航天大学 | Turbine joggle joint structure photoelastic experiment loading device |
| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
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2009
- 2009-01-14 CN CN200920105201U patent/CN201382883Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592018A (en) * | 2013-11-14 | 2014-02-19 | 北京航空航天大学 | High-low cycle compound fatigue test high-cycle amplitude measuring equipment and method |
| CN103592018B (en) * | 2013-11-14 | 2015-07-08 | 北京航空航天大学 | High-low cycle compound fatigue test high-cycle amplitude measuring equipment and method |
| CN107421984A (en) * | 2017-08-31 | 2017-12-01 | 北京航空航天大学 | A kind of hollow turbine vane is superimposed high Zhou Zhendong thermal mechanical fatigue pilot system and method |
| CN107421984B (en) * | 2017-08-31 | 2018-11-16 | 北京航空航天大学 | A kind of hollow turbine vane is superimposed the thermal mechanical fatigue pilot system and method for high Zhou Zhendong |
| CN109470468A (en) * | 2018-12-29 | 2019-03-15 | 北京航空航天大学 | A kind of height week composite fatigue test fixture of turbine mortise structure |
| CN109470468B (en) * | 2018-12-29 | 2020-08-07 | 北京航空航天大学 | High-low cycle composite fatigue test fixture of turbine joggle joint structure |
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
| CN110108565B (en) * | 2019-06-05 | 2024-02-09 | 长春浩园试验机有限公司 | High-frequency composite electronic universal testing machine |
| CN111006950A (en) * | 2019-12-23 | 2020-04-14 | 北京航空航天大学 | Turbine joggle joint structure photoelastic experiment loading device |
| CN111006950B (en) * | 2019-12-23 | 2020-09-15 | 北京航空航天大学 | Turbine joggle joint structure photoelastic experiment loading device |
| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
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Granted publication date: 20100113 Termination date: 20120114 |