Sequential control device and method based on electromagnetic gun launching bird bombs to impact rotating blades

Abstract

The invention discloses a sequential control device and method based on rotating blades of an electromagnetic gun bird bomb launching device. The sequential control device comprises a vacuum chamber, a vacuumizing system and a rotating system, the bird bomb launching device is arranged in the vacuum chamber, a capacitor device is connected with the bird bomb launching device, and a camera is arranged in the vacuum chamber; the rotating system is arranged in the vacuum cabin and can move out of the vacuum cabin, the rotating system comprises a vertical plate, a rotating device is arranged on the vertical plate, a test piece rotor is detachably connected to an output shaft of the rotating device, a blade is connected to the test piece rotor, an inductor is installed on the blade, a sensor is arranged on the vertical plate, and the sensor can detect the inductor. The signal is sent to the controller and the synchronizer, the controller can control the starting of the capacitor device, and the synchronizer can set the starting delay time of the capacitor device. According to the technical scheme, the positions of the bird bombs impacting the blades can be accurately controlled, the test precision is improved, the number of the blades required to be assembled for testing the rotor is reduced, and the test cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace engine testing devices, and in particular to a timing control device and method for rotating blades of a device for launching birdshot based on an electromagnetic gun. Background Art

[0002] There have been many accidents in aviation history where the aircraft was destroyed and people died due to the engine ingesting birds. Therefore, passing the bird ingestion test is very important to aviation safety.

[0003] The bird ingestion clause 33.76 of the "Aircraft Engine Airworthiness Regulations" requires that turbine engines must undergo bird ingestion tests, using bird bombs that meet the requirements to strike key locations on the rotating blades to ensure that the turbine engines meet airworthiness requirements.

[0004] At present, most bird-attraction tests use air cannons for firing. This method can easily achieve the test purpose under the condition that the birdshot hits the stationary blades. However, for rotating blades, due to the large difference between the time scale of birdshot firing and the rotation frequency of fan blades, it is impossible to accurately control the blade position where the birdshot is expected to hit. The only way is to increase the probability of birdshot hitting the blade by repeating the test or increasing the number of blades. Therefore, the test control accuracy of firing birdshots to hit rotating blades through air cannons is not high and the repeatability is poor, which has a great impact on the cost and test accuracy of the bird strike test. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a timing control device and method for bird bombs launched by an electromagnetic gun to hit rotating blades. The technical solution can accurately control the position of the bird bombs hitting the blades, improve the test accuracy, reduce the number of blades required to be assembled on the test rotor, and reduce the test cost.

[0006] The timing control device for rotating blades of an electromagnetic gun birdshot launching device comprises a vacuum chamber, a vacuum pumping system and a rotation system, wherein the vacuum pumping system can pump the vacuum chamber into a vacuum state, a birdshot launching device is arranged in the vacuum chamber, a capacitor device is connected to the birdshot launching device to control charging and discharging of the birdshot launching device, and a camera is arranged in the vacuum chamber;

[0007] The rotation system is arranged in the vacuum chamber and can be moved outside the vacuum chamber. The rotation system includes a vertical plate, a rotation device is arranged on the vertical plate, the output shaft of the rotation device is detachably connected to the test piece rotor, the test piece rotor is connected to blades, the blades are equipped with sensors, and a sensor is arranged on the vertical plate. When the sensor corresponds to the sensor, the sensor can detect the sensor and send a signal to the controller and the synchronizer. The synchronizer is connected to the controller, the controller can control the start-up of the capacitor device, and the synchronizer can set the delay time for the start-up of the capacitor device.

[0008] Preferably, it also includes an amplifier, which is connected to the sensor and can amplify the signal sent by the sensor and send it to the controller and the synchronizer.

[0009] Preferably, a linear motion mechanism is provided in the vacuum chamber, the linear motion mechanism is connected to the vertical plate, and the linear motion mechanism can drive the vertical plate to move.

[0010] Preferably, an openable door is provided on one side of the vacuum chamber.

[0011] Preferably, three blades are connected to the rotor of the test piece, and the sensor is arranged on the middle blade.

[0012] Preferably, the sensor is a laser sensor.

[0013] Preferably, the birdshot launching device is an electromagnetic gun birdshot launching device.

[0014] Preferably, the camera is a high-speed camera.

[0015] The timing control method based on electromagnetic gun launching bird bombs to hit rotating blades includes the following steps:

[0016] A. Determine the birdshot velocity V according to the test requirements bird , according to the distance between the birdshot launching device and the blade impact position, determine the birdshot flight time T bird ;

[0017] B. Determine the test piece rotor speed V according to the test requirements rotor , and the time T for the blade to rotate one circle is obtained rotor = / V rotor , get the synchronizer delay time T delay , T delay =T rotor *X round +T rotor / -T bird , X round is the number of rotations;

[0018] C. Install the test piece rotor, move the vertical plate into the vacuum chamber, and seal the vacuum chamber;

[0019] D. Start the vacuum system to make the vacuum chamber reach the vacuum degree required by the test;

[0020] E. Set the synchronizer delay time T delay , start the rotating device to drive the rotor of the test piece to rotate. When the speed of the rotor of the test piece reaches V rotor After it stabilizes, turn on the sensor;

[0021] F. When the blade passes the sensor, the sensor detects it and sends a signal to the controller and synchronizer;

[0022] G. In T delay Afterwards, the controller controls the capacitor device to start charging the birdshot launching device to launch the birdshot, and simultaneously starts the camera to capture an image of the birdshot hitting the blades.

[0023] The beneficial effects of the present invention are as follows: in the technical solution, the electromagnetic gun technology is used to launch birdshot, so that the birdshot can reach the speed required by the test in a very short time. By arranging the rotation system in the vacuum chamber and being able to move outside the vacuum chamber, it is convenient to install the test piece rotor, and it is located in the vacuum chamber during the test, shortening the flight distance of the birdshot, and reducing the footprint of the overall device. The blade rotation position of the test piece rotor is used as a trigger condition, and the delay time is set by the synchronizer to control the position of the birdshot hitting the blade, thereby achieving precise control of the blade position of birdshots at different speeds, improving the test accuracy, reducing the number of blades required to be assembled on the test rotor, and reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0025] Figure 1 It is a principle block diagram of the present invention;

[0026] Figure 2 It is a left side view of the rotating system of the present invention;

[0027] Figure 3 It is a front view of the rotating system of the present invention;

[0028] Figure 4 This is a front view of the rotating system when the blades rotate to the bottom in the present invention.

[0029] In the attached drawings, 1-vacuum chamber, 2-bird bomb launching device, 3-capacitor device, 4-vacuum extraction system, 5-vertical plate, 6-rotating device, 7-test piece rotor, 8-blade, 9-inductor, 10-sensor, 11-amplifier, 12-controller, 13-synchronizer, 14-camera. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0032] Example 1

[0033] like Figure 1-Figure 4 As shown, in this embodiment, a timing control device based on the rotating blades of the electromagnetic gun birdshot launching device is provided, comprising a vacuum chamber 1, a vacuum pumping system 4, and a rotation system. The vacuum pumping system 4 can pump the vacuum chamber 1 into a vacuum state. A birdshot launching device 2 is arranged in the vacuum chamber 1. A capacitor device 3 is connected to the birdshot launching device 2 to control the charging and discharging of the birdshot launching device 2. A camera 14 is arranged in the vacuum chamber 1.

[0034] The rotation system is arranged in the vacuum chamber 1 and can be moved outside the vacuum chamber 1. The rotation system includes a vertical plate 5, a rotation device 6 is arranged on the vertical plate 5, a test piece rotor 7 is detachably connected to the output shaft of the rotation device 6, a blade 8 is connected to the test piece rotor 7, a sensor 9 is installed on the blade 8, a sensor 10 is arranged on the vertical plate 5, when the sensor 9 corresponds to the sensor 10, the sensor 10 can detect the sensor 9 and send a signal to the controller 12 and the synchronizer 13, the synchronizer 13 is connected to the controller 12, the controller 12 can control the start of the capacitor device 3, and the synchronizer 13 can set the delay time of the start of the capacitor device 3.

[0035] The specific working principle is as follows:

[0036] Determine the birdshot velocity V according to the test requirements bird , according to the distance between the birdshot launching device 2 and the impact position of the blade 8, the birdshot flight time T is determined bird ;

[0037] Determine the rotation speed V of the test piece rotor 7 according to the test requirements rotor , and the time T for blade 8 to rotate one circle is obtained rotor =1 / V rotor , get the delay time T of synchronizer 13 delay , T delay =T rotor *X round +T rotor / 2-T bird , X round is the number of rotations;

[0038] The test piece rotor 7 is installed on the output shaft of the rotating device 6, the movable stand plate 5 is located in the vacuum chamber 1, and the vacuum chamber 1 is sealed;

[0039] Start the vacuum system 4 to make the vacuum chamber 1 reach the vacuum degree required by the test;

[0040] Set the delay time T of synchronizer 13 delay , start the rotating device 6 to drive the test piece rotor 7 to rotate. When the speed of the test piece rotor 7 reaches V rotor After stabilization, turn on the sensor 10;

[0041] When the blade 8 passes the sensor 10, the sensor 10 detects the inductor 9 and sends a signal to the controller 12 and the synchronizer 13;

[0042] In T delay Afterwards, the controller 12 controls the capacitor device 3 to start charging the birdshot launching device 2 to launch the birdshot, and simultaneously starts the camera 14 , which captures the image of the birdshot hitting the blade 8 .

[0043] Birdshot impact Figure 4 The position shown in the figure is shown in the figure. In this way, the birdshot is launched by electromagnetic gun technology, so that the birdshot can reach the speed required by the test in a very short time. By arranging the rotation system in the vacuum chamber 1 and being able to move to the outside of the vacuum chamber 1, it is convenient to install the test piece rotor 7, and it is located in the vacuum chamber 1 during the test, shortening the flight distance of the birdshot, and reducing the footprint of the overall device. The rotation position of the blade 8 of the test piece rotor 7 is used as the trigger condition, and the delay time is set by the synchronizer 13 to control the position of the birdshot hitting the blade 8. In this way, accurate control of the position of the birdshot hitting the blade 8 at different speeds is achieved, the test accuracy is improved, the number of blades required to be assembled on the test rotor is reduced, and the test cost is reduced.

[0044] In this embodiment, the capacitor device 3 controls the charging and discharging of the birdshot launching device 2 to achieve different birdshot speeds V bird control.

[0045] In this embodiment, the flight time of the birdshot is T bird According to the experimental results, after the device is produced, different speed experiments can be carried out. After the positions of the vertical plate 5 and the birdshot launching device 2 in the vacuum chamber 1 are fixed, different birdshot speeds V can be measured. bird The time from the birdshot device 2 being activated to the blade 8 is measured in actual tests for different birdshot velocities V. bird and the birdshot flight time T bird The advantage of this is that the birdshot flight time T bird The accuracy of the synchronizer 13 makes the delay time T delayThe setting is accurate, thereby accurately controlling the position where the birdshot hits the blade 8.

[0046] This embodiment also includes an amplifier 11 , which is connected to the sensor 10 . The amplifier 11 can amplify the signal sent by the sensor 10 and send the amplified signal to the controller 12 and the synchronizer 13 .

[0047] In this embodiment, a linear motion mechanism is disposed in the vacuum chamber 1 , and the linear motion mechanism is connected to the vertical plate 5 , and the linear motion mechanism can drive the vertical plate 5 to move.

[0048] In this embodiment, an openable door is provided on one side of the vacuum chamber 1. In this embodiment, an openable door is provided on the rear side of the vacuum chamber 1. In this embodiment, the linear motion mechanism can drive the vertical plate 5 to move forward and backward. When the test piece rotor 7 needs to be installed, the door is opened so that the vertical plate 5 moves to the outside of the chamber for installation. During testing, the vertical plate 5 enters the chamber and then the door is closed. This can facilitate the installation of the test piece rotor 7 and shorten the flight distance of the birdshot during testing to reduce errors. The linear motion mechanism can be a cylinder, etc. In this embodiment, the rotating device 6 is a motor.

[0049] In this embodiment, three blades 8 are connected to the test piece rotor 7 , and the sensor 9 is disposed on the middle blade 8 .

[0050] In this embodiment, the sensor 10 is a laser sensor.

[0051] The birdshot launching device 2 in this embodiment is an electromagnetic gun birdshot launching device. In this embodiment, the electromagnetic gun birdshot launching device is used to enable the birdshot to reach the expected speed in a very short time, reduce errors, increase test repeatability, improve test longitude, and reduce the number of blades 8 that need to be assembled on the test piece rotor 7, thereby reducing the test cost.

[0052] In this embodiment, the camera 14 is a high-speed camera.

[0053] Example 2

[0054] This embodiment provides a timing control method based on electromagnetic gun launching bird bombs to hit rotating blades, including the following steps:

[0055] A. Determine the birdshot velocity V according to the test requirements bird , according to the distance between the birdshot launching device 2 and the impact position of the blade 8, the birdshot flight time T is determined bird ;

[0056] B. Determine the rotation speed V of the test piece rotor 7 according to the test requirements rotor , and the time T for blade 8 to rotate one circle is obtained rotor =1 / V rotor, get the delay time T of synchronizer 13 delay , T delay =T rotor *X round +T rotor / 2-T bird , X round is the number of rotations;

[0057] C. Install the test piece rotor 7, move the vertical plate 5 to be located in the vacuum chamber 1, and seal the vacuum chamber 1;

[0058] D. Start the vacuum system 4 to make the vacuum chamber 1 reach the vacuum degree required by the test;

[0059] E. Set the delay time T of synchronizer 13 delay , start the rotating device 6 to drive the test piece rotor 7 to rotate. When the speed of the test piece rotor 7 reaches V rotor After stabilization, turn on the sensor 10;

[0060] F. When the blade 8 passes the sensor 10, the sensor 10 detects the inductor 9 and sends a signal to the controller 12 and the synchronizer 13;

[0061] G. In T delay Afterwards, the controller 12 controls the capacitor device 3 to start charging the birdshot launching device 2 to launch the birdshot, and simultaneously starts the camera 14 , which captures the image of the birdshot hitting the blade 8 .

[0062] In this embodiment, the flight time of the birdshot is T bird According to the experimental results, after the device is produced, different speed experiments can be carried out. After the positions of the vertical plate 5 and the birdshot launching device 2 in the vacuum chamber 1 are fixed, different birdshot speeds V can be measured. bird The time from the birdshot device 2 being activated to the blade 8 is measured in actual tests for different birdshot velocities V. bird and the birdshot flight time T bird The advantage of this is that the birdshot flight time T bird The accuracy of the synchronizer 13 makes the delay time T delay Precise settings.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A timing control device for rotating blades of a bird bomb launching device based on an electromagnetic gun, characterized in that: The invention comprises a vacuum chamber (1), a vacuum pumping system (4), and a rotation system, wherein the vacuum pumping system (4) is capable of pumping the vacuum chamber (1) into a vacuum state, a birdshot launching device (2) is arranged in the vacuum chamber (1), a capacitor device (3) is connected to the birdshot launching device (2) and is used to control the charging and discharging of the birdshot launching device (2), and a camera (14) is arranged in the vacuum chamber (1); The rotation system is arranged in a vacuum chamber (1) and can be moved outside the vacuum chamber (1). The rotation system comprises a vertical plate (5). A rotation device (6) is arranged on the vertical plate (5). A test piece rotor (7) is detachably connected to the output shaft of the rotation device (6). A blade (8) is connected to the test piece rotor (7). An inductor (9) is installed on the blade (8). A sensor (10) is arranged on the vertical plate (5). When the inductor (9) corresponds to the sensor (10), the sensor (10) can detect the inductor (9) and send a signal to a controller (12) and a synchronizer (13). The synchronizer (13) is connected to the controller (12). The controller (12) can control the start of the capacitor device (3). The synchronizer (13) can set the delay time of the start of the capacitor device (3).

2. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: The device also comprises an amplifier (11), wherein the amplifier (11) is connected to the sensor (10), and the amplifier (11) can amplify the signal sent by the sensor (10) and send the amplified signal to the controller (12) and the synchronizer (13).

3. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: A linear motion mechanism is arranged in the vacuum chamber (1), the linear motion mechanism is connected to the vertical plate (5), and the linear motion mechanism can drive the vertical plate (5) to move.

4. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: An openable door is provided on one side of the vacuum chamber (1).

5. The timing control device for rotating blades of a birdshot launching device based on an electromagnetic gun according to claim 1, characterized in that: Three blades (8) are connected to the test piece rotor (7), and the sensor (9) is arranged on the middle blade (8).

6. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: The sensor (10) is a laser sensor.

7. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: The birdshot launching device (2) is an electromagnetic gun birdshot launching device.

8. The timing control device for rotating blades of a device for launching birdshot based on an electromagnetic gun according to claim 1, characterized in that: The camera (14) is a high-speed camera.

9. A timing control method for electromagnetic guns to launch birdshot and hit rotating blades, characterized in that: The steps include: A. Determine the birdshot velocity V according to the test requirements bird The flight time T of the birdshot is determined based on the distance between the birdshot launching device (2) and the impact position of the blade (8). bird ; B. Determine the rotation speed V of the test piece rotor (7) according to the test requirements rotor , and the time T for blade (8) to rotate one circle is obtained rotor =1 / V rotor , get the synchronizer (13) delay time T delay , T delay =T rotor *X round +T rotor / 2-T bird , X round is the number of rotations; C. Install the test piece rotor (7), move the vertical plate (5) to be located in the vacuum chamber (1), and seal the vacuum chamber (1); D. Start the vacuum system (4) to make the vacuum chamber (1) reach the required vacuum degree for the test; E. Set the delay time T of the synchronizer (13) delay , start the rotating device (6) to drive the test piece rotor (7) to rotate, and when the speed of the test piece rotor (7) reaches V rotor After stabilization, turn on the sensor (10); F. When the blade (8) passes the sensor (10), the sensor (10) detects the inductor (9) and sends a signal to the controller (12) and the synchronizer (13); G. In T delay Afterwards, the controller (12) controls the capacitor device (3) to start charging the birdshot launching device (2) to launch the birdshot, and simultaneously starts the camera (14), so that the camera (14) captures an image of the birdshot hitting the blade (8).

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