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Blade cutting device and containment test device for aeroengine fan case

A technology of cutting device and test device, which is applied in the direction of engine testing, engine starting, engine components, etc., can solve problems such as wiring difficulties, affecting efficiency, and affecting test results, so as to achieve true test results, avoid stress concentration, and ensure operation safe effect

Active Publication Date: 2021-09-03
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the influence of material dispersion, processing error and notch sensitivity, the prefabricated notch method has low control accuracy of the fly-off speed. In practical applications, conservative prefabricated notches are usually used, resulting in the need to go up and down the test many times, and the success rate of the test is difficult. ensure
[0007] The method of combining prefabricated gaps and local rapid heating is only suitable for metal materials whose tensile strength is sensitive to temperature rise. In addition, it also faces the problem of difficult wiring when applied in component level and complete machine containment tests.
[0008] Using contact blasting to break the blade, because the detonation pressure has no directionality, it will increase the extra kinetic energy of the blade flying outward, thus affecting the test results; the energy-concentrating cutter is external, and it is at the tenon fracture position required by the actual engine containment test There is not enough layout space, and it cannot be directly applied to the engine component level and the complete machine containment test
[0009] 2. Cost
[0012] The existing fly-off speed control technology has large errors, and repeated tests are required, which affects efficiency

Method used

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  • Blade cutting device and containment test device for aeroengine fan case
  • Blade cutting device and containment test device for aeroengine fan case
  • Blade cutting device and containment test device for aeroengine fan case

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0073] Such as Figure 8 As shown, in this embodiment, the containment test device of the present application may also include a journal 78 and a conductive slip ring 79 . The journal 78 is fixedly arranged in the test cavity 72, and is sleeved on the top of the transfer section 74 outside the drive shaft 73, and will not rotate with the drive shaft 73; the conductive slip ring 79 is coaxially sleeved on the outside of the journal 78, and passes through The lead that runs through the vacuum chamber cover 71 is connected with the detonation switch.

[0074] Further, the detonating power supply line 6 of the blade cutting device is fixedly laid along the tenon 101 of the blade 10 to be cut, the fan disc 77 and the surface of the transition section 74; more specifically, the detonating power supply connected to the detonator 5 at the upper end of the charging hole 1 Line 6 is formed by tenon 101 upper surface, fan disk 77 rear end surfaces ( Figure 8 middle and upper surface),...

no. 2 example

[0077] The difference from the first embodiment above is that in this embodiment, the slip ring lead 81 is arranged outside the test chamber 72; the slip ring lead 81 is sleeved on the drive shaft outside the test chamber 72 through the lead mount 82 73, and be connected with detonation switch by lead; Further, there is inner hole at drive shaft 73 centers.

[0078] After the detonating power line 6 connected to the detonator 5 at the upper and lower ends of the charging hole 1 is led out to the transition section 74, it penetrates into the interior of the transition section 74 at the top of the transition section 74, and extends from the inner hole at the bottom of the drive shaft 73. It is connected to the slip ring lead 81, so that the detonating switch can detonate the detonator 5 smoothly.

no. 3 example

[0080] In this embodiment, the containment test device may further include a power box 91 and a wireless signal transmitting device 92 .

[0081] Wherein, the power supply box 91 is fixedly arranged on the inner wall of the transition section 74, and the inside of the power supply box 91 may include a power supply, a wireless control switch and a wireless signal receiving device. The wireless control switch is used to control the power on and off; the wireless signal receiving device is used to receive the wireless control signal, and control the wireless control switch according to the wireless control signal.

[0082] Wherein, the detonating power cord 6 connected to the detonator 5 at the upper and lower ends of the charging hole 1 is led out to the transition section 74 in the same way as the above two embodiments. After being drawn out to the transition section 74, the detonating power cord 6 runs through Extend into the inside of the transition section 74 and connect wit...

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Abstract

The application belongs to the field of containment test of aero-engine fan case, and in particular relates to a blade cutting device and a containment test device for aero-engine fan case. The blade cutting device includes: charging holes, which are set on the mortise of the blade to be cut, and internal threads are opened at both ends; cutting cables are laid in the charging holes; In the gap; the detonator fixing bolt is threaded at one end of the charge hole, and the detonator fixing bolt is provided with a detonator, and the two detonator lead wires of the detonator extend out of the head of the detonator fixing bolt from the wire hole; the detonation switch passes through two The detonating power cord is connected with the lead wire of the detonator, and is used for detonating the detonator. This application can make the blade fly off at the specified speed, so that the test results are true and effective, and can also avoid greater stress concentration, and the detonator and cutting cable can be installed last, ensuring the safety of the test piece assembly and lead wire work, and can also Ensure the safe and reliable operation of the detonation system.

Description

technical field [0001] The application belongs to the field of containment test of aero-engine fan case, and in particular relates to a blade cutting device and a containment test device for aero-engine fan case. Background technique [0002] In the case of gas turbine engines, the high-energy debris generated when rotating parts fail puts the engine itself, the aircraft, control surfaces, fuel tanks and pilots at risk. Once the engine is not contained, the aircraft will be damaged, ranging from the loss of flight function to the loss of flight function, and the crash of the aircraft. Therefore, military and civilian gas turbine engine specifications worldwide all have inclusive relevant requirements without exception. The content is basically the same. At least 80% of a single blade must be damaged and contained, and the resulting engine damage must not have any dangerous effect on the aircraft. Generally, engine specifications require verification of fan blade containmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/02F01D21/00F01D25/00F01D19/00
CPCF01D19/00F01D21/003F01D25/00G01M15/02
Inventor 陈国栋王海舟祝昭丹王彤晖姜晓斌张昕东卢序田昊刘正峰赵诗杨
Owner AECC SHENYANG ENGINE RES INST
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