Blade active breaking device for complete machine containment test

Abstract

The invention belongs to the field of complete machine containment test, and relates to a blade active breaking device for complete machine containment test, which comprises a blade blasting cutting device, a wireless signal receiver, a signal receiving enhancing antenna and a wireless signal transmitter, the explosive is detonated by adopting wireless signal emission and receiving, so that the test interference caused by adopting an electric conduction device scheme is avoided. No foreign object exists in front of the engine, an air inlet channel of the engine is not affected, and high-speed camera shooting and recording are not affected; wireless signal transmission is reliable in the high-speed rotation state of the engine, the influence of a cover hood and other conditions on wireless signals can be effectively avoided through the design of the signal enhancement antenna and the lead pipe, and the signal receiving efficiency is greatly improved; an explosive installation scheme is newly designed, a cutting rope is detonated through a detonator, the detonator is fixed through a bolt, meanwhile, related parts of an engine are modified and designed, the structure is simplified, and meanwhile the safety of test piece assembly and lead operation is guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of whole machine containment testing, and in particular, relates to a blade active fracture device for whole machine containment testing. Background Art

[0002] "Non-containment accidents" of aircraft engines can easily lead to catastrophic consequences. If the rotor running in the working state encounters a foreign object collision or fatigue damage, it will cause the blade to break. The broken blade has extremely high energy, which will cause serious damage to the engine and even cause serious air crashes with casualties on the aircraft. For this reason, it is necessary to conduct tests to verify the containment capacity of the engine casing before the test flight. Military and civilian gas turbine engine specifications around the world have put forward requirements for this. In general, a single blade should be contained by the casing after the cross-section outside the tenon is broken, or at least 80% of the single blade of the integral blade must be broken and contained. The engine damage caused by this will not have any dangerous impact on the aircraft. Generally speaking, containment tests are divided into containment tests under test conditions and whole machine containment tests. They are effective and necessary means to verify the containment of the casing, and such tests are extremely expensive.

[0003] In order to conduct a containment test on the entire aircraft engine, the method of blade breaking must first be studied. The prefabricated notch method widely used in the past is greatly affected by material dispersion and processing errors on fan blades. If it breaks prematurely, it will cause test failure or even failure of the entire engine. Obviously, it cannot meet the requirements. However, foreign aircraft engine manufacturers have matured the technology of using blade blasting and cutting methods for containment testing. Due to commercial confidentiality requirements, the specific technical details are unknown. It can be seen from some public documents that on the test engine, a fan blade has a small hole drilled in the blade basin near the dovetail tenon. The hole is filled with explosives and connected to a high-voltage detonator. The wire is led out by a slip ring initiator installed behind the low-pressure turbine rotor. When the engine runs to the expected target speed, the slip ring initiator is used to detonate it, causing the blade to break and fly off. Photos of the relevant test device are shown in the figure. Figure 1 shown.

[0004] The engine whole unit containment test conditions are complex, including the aerodynamic loads caused by high-speed operation, and because the explosives used in this plan are explosive and dangerous goods, there are major safety hazards in a series of work such as engine assembly and commissioning after the explosives are pre-buried.

[0005] Therefore, how to conduct safe and efficient overall inclusion trials is a problem that needs to be solved. Summary of the invention

[0006] The purpose of this application is to provide a blade active fracture device for whole machine containment testing to solve the problems of complex whole machine containment testing and high safety risks.

[0007] The technical solution of the present application is: a blade active fracture device for whole machine containment test, comprising a blade blasting and cutting device, a wireless signal receiver, a signal reception enhancement antenna and a wireless signal transmitter;

[0008] The blade blasting and cutting device is arranged at the blade disconnection position, and the blade blasting and cutting device is connected to a wireless signal receiver; the wireless signal receiver is installed in the fan disk mounting arm, and the wireless signal receiver is connected to a signal reception enhancement antenna, and the signal reception enhancement antenna is arranged at the front section of the engine, and the wireless signal transmitter is arranged at the front side end of the engine, and the signal reception enhancement antenna is wirelessly connected to the wireless signal transmitter.

[0009] Preferably, the blade blasting and cutting device includes a cutting rope, a detonator and a lead; a tenon hole is opened at the broken position of the blade, the cutting rope and the detonator are installed side by side in the tenon hole of the blade, and threaded bolts are connected at both ends of the tenon hole, and the cutting rope and the detonator are fixed after tightening; the cutting rope is abutted against the detonator, and the detonator is connected to the wireless signal receiver through a lead.

[0010] Preferably, a placement hole is provided on the blade and is arranged side by side with the tenon hole of the blade. An extension cord of the detonating power supply is arranged in the placement hole. One end of the extension cord of the detonating power supply is connected to the lead of the detonator. The placement hole is a threaded hole. Glue is applied in the placement hole. The other end of the extension cord of the detonating power supply is connected to the wireless signal receiver.

[0011] Preferably, the wireless signal receiver includes a mounting disk, a wireless signal receiving module and a battery; the wireless signal receiving module and the battery are both mounted on the mounting disk, there are multiple groups of batteries and they are evenly distributed along the circumference of the mounting disk, the battery is electrically connected to the wireless signal receiving module, and the wireless signal receiving module can receive wireless signals emitted by the wireless signal transmitter.

[0012] Preferably, the mounting disk comprises a main disk body, a heat insulation disk and a cover plate; the main disk body is connected to the fan disk mounting arm by bolts, the heat insulation disk and the cover plate are coaxially arranged with the main disk body, the heat insulation disk is arranged between the cover plate and the main disk body, the heat insulation disk, the cover plate and the main disk body are connected by bolts, an inner cavity for accommodating a fixed wireless signal receiving module and a battery is provided between the cover plate and the heat insulation disk, an antenna jack for connecting a signal receiving enhancement antenna is provided in the middle of the cover plate, signal line lead holes connected to the blade blasting and cutting device are provided on the side walls of the heat insulation disk and the main disk body, and the signal line lead holes on the heat insulation disk and the main disk body are correspondingly connected.

[0013] Preferably, the heat insulation plate is made of heat insulation material, and heat insulation cotton is filled between the heat insulation plate and the main plate body.

[0014] Preferably, the signal reception enhancement antenna adopts a vertical spiral antenna structure; a lead tube is arranged between the wireless signal receiver and the signal reception enhancement antenna.

[0015] The blade active fracture device for the whole machine containment test of the present application, 1. Use wireless signal transmission and reception to detonate explosives, avoiding the test interference caused by the previous use of the detonator solution. There is no foreign object in front of the engine, which does not affect the engine intake airflow path, does not affect the high-speed camera shooting record, and does not cause additional damage to the engine after the test; the wireless signal transmission is reliable when the engine rotates at high speed, and the influence of the cap and other conditions on the wireless signal can be effectively avoided through the design of the signal enhancement antenna and the lead tube, greatly improving the signal reception efficiency and ensuring the success of signal reception; the installation plate is designed at the center of the disk to fix the wireless signal receiving module and the battery, ensuring the balance of the fan rotor while facilitating the lead-in, and a heat insulation device is designed to ensure a good working environment; a new explosive installation scheme is designed, the cutting rope is detonated by the detonator, and the detonator is fixed by bolts, and the engine-related components are modified and designed to achieve the final installation of the cutting rope and the detonator, simplifying the structure while ensuring the safety of the test piece assembly and lead-in work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0017] Figure 1 It is a schematic diagram of the existing engine whole machine containment test device;

[0018] Figure 2 This is a schematic diagram of the overall structure of this application;

[0019] Figure 3 This is a schematic diagram of the blade blasting and cutting device for this application;

[0020] Figure 4 This is a schematic diagram of the structure of the wireless signal receiver of this application;

[0021] Figure 5 A cutaway view of the mounting plate for this application;

[0022] Figure 6 This is a schematic diagram of the lead tube structure of this application.

[0023] 1. Blade blasting and cutting device; 2. Wireless signal receiver; 3. Signal reception enhancement antenna; 4. Wireless signal transmitter; 5. Cutting rope; 6. Detonator; 7. Fuse; 8. Placement hole; 9. Detonation power extension cord; 10. Installation plate; 11. Wireless signal receiving module; 12. Battery; 13. Main plate; 14. Heat insulation plate; 15. Cover plate; 16. Antenna jack; 17. Signal line lead hole; 18. Heat insulation cotton; 19. Lead tube. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] A blade active fracture device for whole machine containment test, such as Figure 2 , including a blade blasting and cutting device 1, a wireless signal receiver 2, a signal reception enhancement antenna 3 and a wireless signal transmitter 4.

[0026] The blade blasting and cutting device 1 is arranged at the blade disconnection position, and the blade blasting and cutting device 1 is connected to the wireless signal receiver 2. The wireless signal receiver 2 is installed in the fan disk mounting arm, and the wireless signal receiver 2 is connected to the signal reception enhancement antenna 3, and the signal reception enhancement antenna 3 is arranged at the front section of the engine, and the wireless signal transmitter 4 is arranged at the front side end of the engine. The signal reception enhancement antenna 3 is wirelessly connected to the wireless signal transmitter 4, and the two are close to each other to ensure signal stability.

[0027] Preferably, if Figure 3 The blade blasting and cutting device 1 comprises a cutting rope 5, a detonator 6 and a lead 7. A tenon hole is opened at the fracture position of the blade, and the cutting rope 5 and the detonator 6 are installed side by side in the tenon hole of the blade, and bolts are threadedly connected at both ends of the tenon hole, and the cutting rope 5 and the detonator 6 are fixed after tightening; the cutting rope 5 and the detonator 6 are butted against each other, and the detonator 6 is connected to the wireless signal receiver 2 through the lead 7.

[0028] Preferably, a placement hole 8 arranged side by side with the tenon hole is opened on the blade, and an initiating power extension line 9 is arranged in the placement hole 8, one end of the initiating power extension line 9 is connected to the lead 7 of the detonator 6, and the placement hole 8 is a threaded hole. The initiating power extension line 9 is filled and fixed in the placement hole 8 by medical cotton coated with glue, and the other end of the initiating power extension line 9 is connected to the wireless signal receiver 2. The placement hole 8 and the initiating power extension line 9 are arranged to ensure the stable transmission of signals between the detonator 6 and the wireless signal receiver 2.

[0029] Preferably, if Figure 4 The wireless signal receiver 2 includes a mounting plate 10, a wireless signal receiving module 11 and a battery 12. The wireless signal receiving module 11 and the battery 12 are both mounted on the mounting plate 10. There are multiple groups of batteries 12 and they are evenly distributed along the circumference of the mounting plate 10. The battery 12 is electrically connected to the wireless signal receiving module 11. The wireless signal receiving module 11 can receive the wireless signal sent by the wireless signal transmitter 4, thereby realizing wireless signal transmission.

[0030] In order to avoid the influence of centrifugal force on the coil under high-speed rotation, an electronic switch is set on the mounting plate 10 to replace the relay coil. The electronic switch is connected between the wireless signal receiving module 11 and the battery 12 and is also powered by the battery 12 to ensure stable control.

[0031] The wireless signal receiver 2 is arranged on the engine axis as far as possible to avoid damaging the unbalance of the rotor and causing excessive vibration.

[0032] like Figure 5 , and considering the high rotation speed of the test, a mounting plate 10 is designed to fix the wireless signal receiving module 11 and the battery 12. According to the requirements of the whole machine inclusion test, the mounting plate 10 includes a main plate body 13, a heat insulation plate 14 and a cover plate 15. The main plate body 13 is connected to the fan plate mounting arm by bolts, and the heat insulation plate 14 and the cover plate 15 are coaxially arranged with the main plate body 13. The heat insulation plate 14 is arranged between the cover plate 15 and the main plate body 13. The heat insulation plate 14, the cover plate 15 and the main plate body 13 are connected by bolts. An inner cavity for accommodating and fixing the wireless signal receiving module 11 and the battery 12 is opened between the cover plate 15 and the heat insulation plate 14. An antenna jack 16 for connecting the signal receiving enhancement antenna 3 is opened in the middle of the cover plate 15. The side walls of the heat insulation plate 14 and the main plate body 13 are opened with a signal line lead hole 17 connected to the blade blasting and cutting device 1, and the signal line lead holes 17 on the heat insulation plate 14 and the main plate body 13 are correspondingly connected.

[0033] Preferably, the heat insulation plate 14 is made of heat insulation material, and heat insulation cotton 18 is filled between the heat insulation plate 14 and the main plate body 13 .

[0034] The heat insulation plate 14 and the heat insulation cotton 18 can isolate the hot air at the rear end of the engine, so that the ambient temperature of the wireless signal device can meet the use requirements to avoid damage and failure of the wireless signal receiving module 11 caused by overheating.

[0035] Since the fan cap shields the signal transmission to a certain extent under the whole machine test condition, the signal receiving enhancement antenna 3 adopts a vertical spiral antenna structure. A lead tube 19 is set between the wireless signal receiver 2 and the signal receiving enhancement antenna 3, and the signal receiver antenna is led out of the cap through the lead tube 19, and then the wireless signal is better received through the signal receiving enhancement antenna 3. The lead tube 19 is shown in the schematic diagram Figure 6 shown.

[0036] The wireless signal transmitter 4 is arranged at a position about 15m in front of the engine to avoid affecting the flow path of the engine and can effectively transmit signals. The wireless signal transmitter 4 is provided with a transmitting switch, which can be connected to the test control room through a wire. After the test conditions are met, the transmitting switch is pressed, and a wireless signal with an operating frequency of 433MHz is transmitted through the transmitter end through the wire. The signal receiving enhancement antenna 3 in the high-speed rotating state receives the signal and transmits it to the signal receiving device, so that the control circuit is closed, and the power supply battery 12 supplies power to the detonator 6 to detonate the cutting rope 5.

[0037] Through the above design, this application has the following advantages:

[0038] 1. Wireless signal transmission and reception are used to detonate explosives, avoiding test interference caused by the previous use of electrical detonators. There are no foreign objects in front of the engine, which does not affect the engine intake flow path, does not affect high-speed camera recording, and does not cause additional damage to the engine after the test, greatly increasing safety;

[0039] 2. The wireless signal transmission is reliable when the engine is rotating at high speed. The signal enhancement antenna and lead tube design can effectively avoid the influence of the cap and other conditions on the wireless signal, greatly improve the signal reception efficiency and ensure successful signal reception;

[0040] 3. A mounting plate is designed at the center of the disk to fix the wireless signal receiving module and the battery, which ensures the balance of the fan rotor and is convenient for wiring. A heat insulation device is designed to ensure a good working environment.

[0041] 4. A new explosive installation scheme was designed. The cutting rope was detonated by a detonator, which was fixed by bolts. At the same time, the engine-related components were modified and redesigned to achieve the final installation of the cutting rope and detonator. This simplified the structure while ensuring the safety of the test piece assembly and lead work.

[0042] Finally, it should be noted that: the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention can be combined with each other;

[0043] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blade active fracture device for whole machine containment test, characterized in that: It comprises a blade blasting and cutting device (1), a wireless signal receiver (2), a signal reception enhancement antenna (3) and a wireless signal transmitter (4); The blade blasting and cutting device (1) is arranged at the blade disconnection position, and the blade blasting and cutting device (1) is connected to a wireless signal receiver (2); the wireless signal receiver (2) is installed in a fan disk mounting arm, and the wireless signal receiver (2) is connected to a signal reception enhancement antenna (3), and the signal reception enhancement antenna (3) is arranged at the front section of the engine; the wireless signal transmitter (4) is arranged at the front side end of the engine, and the signal reception enhancement antenna (3) is wirelessly connected to the wireless signal transmitter (4).

2. The blade active fracture device for whole machine containment test according to claim 1, characterized in that: The blade blasting and cutting device (1) comprises a cutting rope (5), a detonator (6) and a lead wire (7); a tenon hole is opened at the fractured position of the blade, the cutting rope (5) and the detonator (6) are installed side by side in the tenon hole of the blade, and threaded bolts are connected at both ends of the tenon hole, and the cutting rope (5) and the detonator (6) are fixed after being tightened; the cutting rope (5) and the detonator (6) are abutted against each other, and the detonator (6) is connected to the wireless signal receiver (2) through the lead wire (7).

3. The blade active fracture device for whole machine containment test according to claim 2, characterized in that: A placement hole (8) is provided on the blade and is arranged side by side with the tenon hole of the blade. A detonating power extension line (9) is arranged in the placement hole (8). One end of the detonating power extension line (9) is connected to a lead (7) of a detonator (6). The placement hole (8) is a threaded hole. Glue is applied in the placement hole (8). The other end of the detonating power extension line (9) is connected to a wireless signal receiver (2).

4. The blade active fracture device for whole machine containment test according to claim 1, characterized in that: The wireless signal receiver (2) comprises a mounting plate (10), a wireless signal receiving module (11) and a battery (12); the wireless signal receiving module (11) and the battery (12) are both mounted on the mounting plate (10); there are a plurality of batteries (12) and the batteries (12) are evenly distributed along the circumference of the mounting plate (10); the batteries (12) are electrically connected to the wireless signal receiving module (11); and the wireless signal receiving module (11) is capable of receiving wireless signals emitted by a wireless signal transmitter (4).

5. The blade active fracture device for whole machine containment test according to claim 4, characterized in that: The mounting plate (10) comprises a main plate body (13), a heat insulating plate (14) and a cover plate (15); the main plate body (13) is connected to a fan plate mounting arm by bolts; the heat insulating plate (14) and the cover plate (15) are coaxially arranged with the main plate body (13); the heat insulating plate (14) is arranged between the cover plate (15) and the main plate body (13); the heat insulating plate (14), the cover plate (15) and the main plate body (13) are connected by bolts; the cover plate (15) and the heat insulating plate An inner cavity for accommodating a fixed wireless signal receiving module (11) and a battery (12) is provided between the cover plate (15), an antenna jack (16) for connecting a signal receiving enhancement antenna (3) is provided in the middle of the cover plate (15), and signal line lead holes (17) connected to the blade blasting and cutting device (1) are provided on the side walls of the heat insulation plate (14) and the main plate body (13), and the signal line lead holes (17) on the heat insulation plate (14) and the main plate body (13) are correspondingly connected.

6. The blade active fracture device for whole machine containment test according to claim 5, characterized in that: The heat-insulating plate (14) is made of a heat-insulating material, and heat-insulating cotton (18) is filled between the heat-insulating plate (14) and the main plate body (13).

7. The blade active fracture device for whole machine containment test according to claim 1, characterized in that: The signal reception enhancement antenna (3) adopts a vertical helical antenna structure; a lead tube (19) is arranged between the wireless signal receiver (2) and the signal reception enhancement antenna (3).

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