Bird body collecting device for engine bird impact test speed calibration

Abstract

The invention provides a bird body collecting device for engine bird impact test speed calibration, which comprises a mounting bottom plate and a buffer collector, and is characterized in that the collector comprises a collecting guide pipe, and the guide pipe comprises a vertical section, a bent section and a horizontal section which are communicated in sequence; a buffer assembly is arranged at the bottom of the vertical section and fixed to the bottom plate, and a bird body divider is arranged at an opening of the horizontal section. The front cabin is fixedly connected with the opening of the horizontal section, a speed monitor and an electromagnetic switch device are arranged in the front cabin, an anti-splashing cabin door is arranged at the inlet end of the front cabin, the electromagnetic switch device is connected with the anti-splashing cabin door, and the speed monitor is used for monitoring the flight speed of a bird body and is connected with the electromagnetic switch device; when the speed signal is monitored, the electromagnetic switch device is triggered to control the anti-splashing cabin door to be closed. The device has the advantages of miniaturization, automation, good buffering effect, easiness in operation and the like, and solves the problems of large bird impact, difficulty in residue collection and the like during bird speed calibration.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engine bird strike tests, and in particular to a bird body collecting device used for speed calibration of an engine bird strike test. Background Art

[0002] Aircraft are at risk of bird strikes during their climb, cruise, and landing phases. Bird strikes can not only severely damage the aircraft's structure, but can even lead to catastrophic consequences, resulting in the destruction of the aircraft and the loss of life. Airworthiness regulations require aircraft engines to undergo rigorous bird strike tests, which simulate flight accidents involving collisions between birds and aircraft engines and are used to evaluate the engine's bird strike resistance. The bird strike test can be a real or artificial bird, and the impact target is generally a rotating engine fan rotor. Because the test is somewhat destructive, test parameters must be determined before the formal test, such as fan speed, bird speed, and other important indicators.

[0003] The bird's velocity is currently determined using velocity calibration. Using a launcher such as an air cannon, the target bird is accelerated to a certain speed. High-speed cameras and velocity sensors are then used to measure the bird's velocity at exit. Since formal testing is typically conducted within a vacuum chamber, a high-speed bird possesses considerable energy. A direct impact with the chamber could cause damage and potentially scatter debris, significantly impacting the test environment.

[0004] Existing bird strike test velocity calibrations mostly use flat plates as impact targets. While this protects the vacuum chamber from impact, it still doesn't effectively address the collection of bird debris. Furthermore, due to the high energy of a bird's flight, the flat target plate requires a large thickness, making it heavy and difficult to move. Furthermore, the plate is tall and requires a long processing cycle, and debugging requires significant labor and material resources. Summary of the Invention

[0005] In light of this, embodiments of the present application provide a bird collection device for engine bird strike test velocity calibration. This device collects birds of varying speeds and masses and is used to calibrate bird strike velocity during bird strike tests. This device offers advantages such as miniaturization, automation, excellent buffering, and ease of operation, resolving issues such as high bird impact and difficulty collecting debris during bird strike velocity calibration.

[0006] The present application provides the following technical solution: a bird body collection device for speed calibration of an engine bird strike test, comprising:

[0007] A mounting base and a buffer collector are installed. The buffer collector includes a collection guide pipe and a buffer assembly. The collection guide pipe includes a vertical section vertically fixed to the mounting base, and a horizontal section connected to the vertical section. The vertical section and the horizontal section are connected through a curved section with a rounded structure. The buffer assembly is provided at the bottom of the vertical section and is fixedly mounted on the mounting base. A bird body divider is provided at the opening of the horizontal section.

[0008] It also includes a front cabin of the collecting device, which is fixedly connected to the opening position of the horizontal section. A speed monitor and an electromagnetic switch device are respectively arranged inside the front cabin of the collecting device. An anti-splash door is arranged at the inlet end of the front cabin of the collecting device. The electromagnetic switch device is control-connected to the anti-splash door to control the opening and closing of the anti-splash door. The speed monitor is used to monitor the flight speed of the bird, and the speed monitor is control-connected to the electromagnetic switch device to trigger the electromagnetic switch device when a speed signal is detected, and the anti-splash door is controlled to be closed by the electromagnetic switch device.

[0009] According to one embodiment of the present application, the curved section is an elastic pipe wall made of a highly elastic rubber material.

[0010] According to one embodiment of the present application, the buffer assembly includes a buffer spring and a collecting plate. The bottom end of the buffer spring is fixed to the mounting base plate, and the collecting plate is fixed to the top end of the buffer spring.

[0011] According to one embodiment of the present application, a storage cabin door is further opened on the vertical section of the collecting guide tube, the position of the storage cabin door corresponds to the position of the buffer assembly, and the height of the bottom edge of the storage cabin door is lower than the height when the buffer spring is in a fully compressed state.

[0012] According to one embodiment of the present application, the device also includes a straight plate support structure, the bottom of the straight plate support structure is fixed on the mounting base plate, and the top of the straight plate support structure is fixedly supported on the bottom end of the horizontal section of the collecting guide pipe.

[0013] According to one embodiment of the present application, the mounting base plate includes a first base plate and a second base plate, a slide groove is provided on the first base plate, and a mounting hole adapted to the slide groove is provided on the second base plate, the collecting guide tube and the straight plate support structure are both fixed on the second base plate, the second base plate is installed on the first base plate, and can be moved along the slide groove, and the second base plate is fixed to the first base plate by assembling a fixing part in the mounting hole.

[0014] According to one embodiment of the present application, the device further includes a lifting ring, which is clamped on the outer wall of the horizontal section, and the bottom of the lifting ring is integrally connected to the top of the straight plate supporting structure.

[0015] According to one embodiment of the present application, the bird body divider includes a cylindrical outer ring wall and a plurality of cutting blades fixedly installed in the outer ring wall, and the plurality of cutting blades are evenly distributed circumferentially on the outer ring wall.

[0016] According to one embodiment of the present application, the splash-proof door is fixed on the wall of the front cabin of the collection device by means of suction provided by an electromagnet, and is used to trigger the electromagnetic switch device when the speed monitor detects a speed signal, causing the electromagnet to lose power, and the splash-proof door to close after rotating 90°.

[0017] According to one embodiment of the present application, a plurality of the speed monitors are distributed at intervals inside the front compartment of the collection device.

[0018] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: the mounting base designed in the embodiment of the present invention has a through hole and a slide groove, which is fixed to a firm platform by bolts on the one hand, and the entire device is fixed on the slide groove on the other hand. The position of the entire device can be adjusted on the slide groove to achieve matching of the collection device mouth with the flight path of the bird; the buffer collector designed in the present invention contains a spring with moderate stiffness, which can well receive the broken bird body and absorb the kinetic energy of the bird body at the end, thereby collecting the bird body after the test; the guide tube designed in the present invention can guide the flight direction of the bird body into the buffer collector and further slow down the flight of the bird body. Speed, absorb collision energy, and realize directional and fixed-point collection; the bird body splitter designed by the present invention can split the intact bird body flying at high speed into several fragments, while reducing the movement speed of the bird body. After segmentation, the bird body fragments enter the guide tube through the gap between the blades, which is conducive to collection; the front cabin of the collection device designed by the present invention has speed monitoring and anti-splashing functions, and collects the bird body's terminal speed data through laser non-contact speed measurement, and triggers the cabin door to close to prevent the broken bird body from flying out; one end of the straight plate support designed by the present invention is connected to the lifting ring, and the other end is connected to the mounting base, thereby enhancing the stability and strength of the device, and the device will not be damaged when facing the huge impact force of the high-speed flying bird body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic diagram of the internal structure of a bird body collection device according to an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the external structure of the bird body collection device according to an embodiment of the present invention in an anti-splashing state;

[0022] Figure 3 This is a schematic diagram of the external structure of the bird body collection device according to an embodiment of the present invention with its hatch open;

[0023] Figure 4 This is a schematic structural diagram of a bird body collection device according to another embodiment of the present invention;

[0024] Figure 5 This is a velocity decomposition diagram of a bird fragment hitting the elastic bending section of the guide tube according to an embodiment of the present invention;

[0025] Figure 6 This is a flow chart of the automatic anti-splashing principle of the bird body collection device according to an embodiment of the present invention;

[0026] Among them, 1-installation base plate, 2-buffer collector, 3-storage cabin door, 4-collection guide pipe, 5-straight plate support structure, 6-bird body divider, 7-speed monitor, 8-electromagnetic switch device, 9-anti-splash cabin door, 10-collection device front cabin, 11-lifting ring. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0029] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a bird body collection device for engine bird strike test speed calibration, comprising:

[0030] A mounting base plate 1 and a buffer collector 2 are provided. The buffer collector 2 includes a collection guide pipe 4 and a buffer assembly. The collection guide pipe 4 includes a vertical section vertically fixed to the mounting base plate 1, and a horizontal section connected to the vertical section. The vertical section and the horizontal section are connected via a curved section with a rounded structure. The buffer assembly is provided at the bottom of the vertical section and is fixedly mounted on the mounting base plate 1. A bird body divider 6 is provided at the opening of the horizontal section.

[0031] It also includes a front cabin 10 of the collecting device, which is fixedly connected to the opening position of the horizontal section. A speed monitor 7 and an electromagnetic switch device 8 are respectively arranged inside the front cabin 10 of the collecting device. A splash-proof door 9 is arranged at the inlet end of the front cabin 10 of the collecting device. The electromagnetic switch device 8 is control-connected with the splash-proof door 9 to control the opening and closing of the splash-proof door 9. The speed monitor 7 is used to monitor the flight speed of the bird, and the speed monitor 7 is control-connected with the electromagnetic switch device 8 to trigger the electromagnetic switch device 8 when a speed signal is detected, and the splash-proof door 9 is controlled by the electromagnetic switch device 8.

[0032] In one embodiment of the present invention, the curved section is an elastic pipe wall made of a highly elastic rubber material. The collection guide tube 4 is shaped like a curved cylindrical pipe, with a buffer assembly, a bird body separator 6, and a collection device front compartment 10 disposed at each end. The highly elastic rubber material used in the pipe's turning section allows the pipe wall to deform in the event of a collision, effectively buffering energy and ensuring that the majority of the bird's kinetic energy is absorbed by the elastic deformation and converted into elastic potential energy, reducing the impact force generated by the collision. Furthermore, the bird's velocity is directed toward the buffer assembly, facilitating the collection of debris.

[0033] In a specific implementation, the buffer assembly includes a buffer spring and a collection plate. The bottom end of the buffer spring is fixed on the mounting base plate 1, and the collection plate is fixed on the top end of the buffer spring to further reduce the impact force generated by the collision. It can well receive the broken bird body and absorb the kinetic energy of the bird body at the end, thereby collecting the bird body after the test.

[0034] In one embodiment of the present invention, a storage cabin door 3 is also opened on the vertical section of the collecting guide tube 4, the position of the storage cabin door 3 corresponds to the position of the buffer assembly, and the height of the bottom edge of the storage cabin door 3 is lower than the height of the buffer spring when it is in a fully compressed state, so as to facilitate the complete discharge of the bird body entering the collecting guide tube 4 from the storage cabin door 3.

[0035] In order to enhance the stability and strength of the device, in one embodiment of the present invention, the device also includes a straight plate support structure 5, the bottom of the straight plate support structure 5 is fixed on the mounting base plate 1, and the top of the straight plate support structure 5 is fixedly supported on the bottom end of the horizontal section of the collecting guide pipe 4.

[0036] like Figure 4 As shown, in one embodiment of the present invention, the mounting base plate 1 includes a first base plate and a second base plate, a slide groove is provided on the first base plate, and a mounting hole adapted to the slide groove is provided on the second base plate, the collecting guide tube 4 and the straight plate supporting structure 5 are both fixed on the second base plate, the second base plate is installed on the first base plate, and can be moved along the slide groove, and the second base plate is fixed to the first base plate by assembling fixings in the mounting holes.

[0037] During specific implementation, the mounting base 1 designed in this embodiment has mounting holes and slide grooves. On the one hand, it is fixed to a firm platform by bolts (the above-mentioned fixing parts), and on the other hand, the entire device is fixed on the slide groove. The position of the entire device can be adjusted on the slide groove to achieve matching between the collection device mouth and the flight path of the bird.

[0038] In specific implementation, the mounting base plate 1 is made of high-strength structural steel, and its function is to securely connect the buffer collector 2 and the straight plate support structure 5, so that it can withstand the huge impact force of the bird during bird speed calibration, and a slide groove is designed on the mounting base plate 1 to achieve matching of the collection device mouth with the bird's flight path.

[0039] In specific implementation, the collecting guide tube 4 uses high-strength structural steel as the material of the main structure, and a spring with moderate stiffness is installed inside. Its function is to receive the bird body used for calibration, which can fully absorb the impact energy of the bird body and slow down its speed to 0, without bouncing out of the device, and avoiding further fragmentation of the bird body.

[0040] In one embodiment of the present invention, the bird body divider 6 includes a cylindrical outer ring wall and a plurality of cutting blades fixedly installed in the outer ring wall, the plurality of cutting blades are evenly distributed circumferentially on the outer ring wall, and the blades have a conical shape. In specific implementation, the outer structure of the bird body divider 6 is cylindrical, and sharp blades are installed inside. They are all made of sharp high-strength structural steel and are connected to the collection guide tube 4. Its function is to directly collide with the bird body at a calibrated speed head-on, divide the bird body into several small pieces, and slow down the speed of the bird body so that it can enter the collection guide tube 4 more smoothly. At the same time, the number of bird body parts and the discreteness of each part after division can be controlled by adjusting the number of divider guide vanes and the opening angle of the guide vanes, thereby reducing the impact strength on the entire device to a certain extent.

[0041] To further enhance the stability and strength of the device, in one embodiment of the present invention, the device also includes a lifting ring 11, which is clamped onto the outer wall of the horizontal section. The bottom of the lifting ring 11 is integrally connected to the top of the straight plate support structure 5. The straight plate support structure 5 designed in this embodiment is connected to the lifting ring 11 at one end and to the mounting base 1 at the other end, thereby enhancing the stability and strength of the device. The device will not be damaged by the tremendous impact force of a high-speed flying bird. Furthermore, the lifting ring 11 facilitates the lifting and movement of the device.

[0042] During specific implementation, a plurality of speed monitors 7 are distributed at intervals inside the front cabin 10 of the collection device. The speed monitor 7 can be a pulse transmitter, which emits a pulse signal when a bird is detected passing by. The speed of the bird is calculated by the time of the pulse signals emitted by the plurality of speed monitors 7, thereby realizing the monitoring of the final flight speed of the bird and providing test data. Specifically, the splash-proof door 9 is fixed to the wall of the front cabin 10 of the collection device by an electromagnet providing suction force. When the speed monitor 7 detects a speed signal, it triggers the electromagnetic switch device 8 to de-energize the electromagnet. The splash-proof door 9 is closed after rotating 90° to prevent the fragments of the bird from bouncing out of the collection device after the collision, and also to prevent the bird's accessories from entering the collection device, thereby affecting the detection accuracy.

[0043] When performing the broken bird body collection task, the embodiment of the present invention first utilizes the mounting holes and slide grooves on the mounting base 1 to securely connect with the collection guide tube 4, so that the assembled bird body collection device can be moved on the track to meet the different flight trajectory requirements in various bird strike tests. Secondly, a spring buffer component is designed inside the collection guide tube 4, and a spring with a spring coefficient of k is selected. According to Hooke's law F=kx, combined with the elastic potential energy of the spring, The stroke and pre-compression of the spring are properly designed so that the buffer collector 2 can efficiently absorb and store the kinetic energy of the object.

[0044] The collecting guide pipe 4 is composed of a rigid pipe and an elastic pipe wall, wherein the elastic pipe wall is designed at a position as follows: Figure 1 As shown. This device solves the energy buffering problem of high-speed bird impact in the pipeline by designing an elastic pipe wall at the 90° corner, reducing the impact force, protecting the guide pipe, and reducing rigid collision and noise. The elastic pipe wall is made of highly elastic rubber material. When the bird hits, according to the momentum theorem Ft = Δp (where F is the average force and Δp is the change in momentum) and the law of conservation of energy (E kis the kinetic energy, m is the mass of the bird, and v is the velocity). The elastic pipe wall will undergo elastic deformation when a collision occurs, reducing the impact force and effectively slowing down the speed of the bird after the collision. At the same time, the flight direction of the bird after passing through the elastic pipe wall will be guided to the buffer collector 2, realizing directional and fixed-point collection.

[0045] Specifically, the velocity decomposition diagram after impact is as follows: Figure 5 As shown. Take a bird fragment as an example. It hits the curved part of the pipe with a speed of V1 and flies out with a speed of V2 after the collision. Decompose V1 and V2 into α (along the tangent direction of the collision point) and β (along the normal direction of the collision point). Ignoring the friction, V 1α =V 2α According to the collision restitution coefficient method, the restitution coefficient e(0,1) is introduced. The restitution coefficient is a dimensionless coefficient between 0 and 1, which is used to describe the degree of kinetic energy loss during the collision. The value of e is related to the viscosity, elasticity, rigidity of the collision contact material and the plasticity of the contact surface. From the restitution coefficient method, we know that V 2β =-e·V 1β , so the kinetic energy loss of the bird fragments at the moment of collision is It plays the role of cushioning the impact of the bird.

[0046] The speed detector is used to monitor the speed of the bird at the end of flight, providing key data for the test. At the same time, the electromagnetic switch device 8 and the anti-splash door 9 are used to realize the automatic anti-splash function. The principle is as follows: Figure 6 When the speed monitor 7 identifies the bird's body speed, it records the speed data and triggers the electromagnetic switch. The locking device of the anti-splash door 9 is unlocked due to the loss of power to the electromagnet, thereby closing the door and realizing the anti-splash function.

[0047] Therefore, the bird body collecting device can well complete the task of collecting broken bird bodies.

[0048] The embodiment of the present invention fixes the device on the bottom plate guide rail through the designed threaded mounting bottom plate structure, so that the collection device mouth is matched with the bird's flight path, is designed with an anti-splashing device to prevent the broken bird from splashing out of the collection device, is designed with a speed monitoring device to obtain the final flight speed of the bird, is designed with a detachable bird body splitting device to achieve bird body splitting, is designed with a 90° guide tube buffer section made of high-elasticity rubber material to achieve bird body impact buffering, is designed with a spring buffer assembly to achieve bird body collection, is designed with a storage cabin door to facilitate the removal of the bird from the collector, is designed with a lifting ring to achieve balanced movement of the overall lifting of the device, and is designed with a fixed straight plate to achieve high strength and high stability of the device as a whole, thereby achieving the collection of birds of different speeds and different masses.

[0049] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A bird body collection device for engine bird strike test speed calibration, characterized in that: include: A mounting base and a buffer collector are installed. The buffer collector includes a collection guide pipe and a buffer assembly. The collection guide pipe includes a vertical section vertically fixed to the mounting base, and a horizontal section connected to the vertical section. The vertical section and the horizontal section are connected through a curved section with a rounded structure. The buffer assembly is provided at the bottom of the vertical section and is fixedly mounted on the mounting base. A bird body divider is provided at the opening of the horizontal section. It also includes a front cabin of the collecting device, which is fixedly connected to the opening position of the horizontal section. A speed monitor and an electromagnetic switch device are respectively arranged inside the front cabin of the collecting device. An anti-splash door is arranged at the inlet end of the front cabin of the collecting device. The electromagnetic switch device is control-connected to the anti-splash door to control the opening and closing of the anti-splash door. The speed monitor is used to monitor the flight speed of the bird, and the speed monitor is control-connected to the electromagnetic switch device to trigger the electromagnetic switch device when a speed signal is detected, and the anti-splash door is controlled to be closed by the electromagnetic switch device.

2. The bird body collection device for engine bird strike test speed calibration according to claim 1, characterized in that: The curved section is an elastic pipe wall made of a highly elastic rubber material.

3. The bird body collection device for engine bird strike test speed calibration according to claim 1, characterized in that: The buffer assembly includes a buffer spring and a collecting plate. The bottom end of the buffer spring is fixed on the mounting base plate, and the collecting plate is fixed on the top end of the buffer spring.

4. The bird body collecting device for engine bird strike test speed calibration according to claim 3, characterized in that: A storage compartment door is also provided on the vertical section of the collecting guide tube. The position of the storage compartment door corresponds to the position of the buffer assembly, and the height of the bottom edge of the storage compartment door is lower than the height when the buffer spring is in a fully compressed state.

5. The bird body collecting device for engine bird strike test speed calibration according to claim 1, characterized in that: The device further comprises a straight plate supporting structure, the bottom of which is fixed on the mounting base plate, and the top of which is fixedly supported on the bottom end of the horizontal section of the collecting guide pipe.

6. The bird body collecting device for engine bird strike test speed calibration according to claim 5, characterized in that: The mounting base plate includes a first base plate and a second base plate, a slide groove is provided on the first base plate, and a mounting hole adapted to the slide groove is provided on the second base plate, the collecting guide tube and the straight plate support structure are both fixed on the second base plate, the second base plate is installed on the first base plate and can move along the slide groove, and the second base plate is fixed to the first base plate by assembling fixings in the mounting holes.

7. The bird body collecting device for engine bird strike test speed calibration according to claim 5, characterized in that: The device further comprises a lifting ring, which is clamped on the outer wall of the horizontal section, and the bottom of the lifting ring is integrally connected to the top of the straight plate supporting structure.

8. The bird body collecting device for engine bird strike test speed calibration according to claim 1, characterized in that: The bird body divider comprises a cylindrical outer ring wall and a plurality of cutting blades fixedly installed in the outer ring wall, and the plurality of cutting blades are evenly distributed on the outer ring wall in a circumferential direction.

9. The bird body collecting device for engine bird strike test speed calibration according to claim 1, characterized in that: The splash-proof door is fixed on the wall of the front cabin of the collection device by means of suction provided by an electromagnet, and is used to trigger the electromagnetic switch device when the speed monitor detects a speed signal, causing the electromagnet to lose power, and the splash-proof door to close after rotating 90°.

10. The bird body collecting device for engine bird strike test speed calibration according to claim 1, characterized in that: A plurality of speed monitors are distributed at intervals inside the front compartment of the collection device.

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