Blade synchronous blasting cutting device for cartridge receiver containment test

Abstract

A blade synchronous blasting cutting device for a cartridge receiver containment test comprises a transmission shaft, blades, a cutting rope, a fixing base, a mounting base, a supporting rod, a blasting propagation assembly, an electric blasting assembly, a signal receiving assembly, a power source and a remote control assembly. The multiple blades are distributed and connected to the shaft wall of the transmission shaft at equal intervals, and the mounting base is connected to the bottom of the transmission shaft and rotates along with the transmission shaft; the number of the supporting rods, the fixing bases, the cutting ropes and the explosion propagation assemblies is equal to the number of blades needing to be cut, one ends of the supporting rods are connected to the side wall of the mounting base, the other ends of the supporting rods extend to the bottoms of the blades, the fixing bases are connected to the surfaces of the blades needing to be cut, and the cutting ropes abut against the positions between the fixing bases and the blades needing to be cut. The electric detonating assembly is arranged in the mounting base, and the signal receiving assembly is arranged on the mounting base. According to the utility model, the plurality of cutting ropes are subjected to synchronous explosion propagation through the explosion propagation assembly, synchronous explosion initiation of the plurality of blades is completed, and test failure caused by unbalance due to successive fracture of the plurality of blades is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of initiators, and particularly relates to a blade synchronous blasting and cutting device for a casing containment test. Background Art

[0002] The fracture and fly-off of the fan blades of an aero-engine have caused many air crashes. In most cases, the fan blades of the engine break due to reasons, and the broken blades fly off under the action of centrifugal load, impact and penetrate the casing, causing damage to the fuselage and resulting in air crashes. Therefore, it is necessary to conduct a casing fan blade containment test to test the containment ability of the aero-engine casing against penetration.

[0003] In the fan blade casing containment test, the method of simulating the fly-off of the fan blades is a key factor for the success of the containment test, and it has very important significance for the bench test of a formal aero-engine. The normal operating speed of the engine can reach more than 10,000 revolutions per minute, and generally, the required instantaneous speed for testing blade fracture is thousands of revolutions per minute or even more than 10,000 revolutions per minute. The commonly used test methods are: one is the mechanical pre-cutting method, that is, cutting a part of the simulated blade to weaken the strength of the designed fracture part to achieve fracture under the preset high-speed rotation state; the other is the explosive pre-cutting method, especially the method of using a shaped charge cutting cable with linear shaped charge to weaken the local strength of the blade under the high-speed rotation state, and then making the blade completely break and fly off under the action of centrifugal force. Using the mechanical pre-cutting method, there is a problem that the pre-cut part cannot be accurately controlled, and it is difficult to accurately achieve the simulated test under the preset speed; while using the shaped charge cutting cable method, it can achieve explosive cutting at the preset speed to obtain test data under the preset speed conditions.

[0004] The blade explosion cutting test method reported in the literature has been applied as a test technology and achieved good results. However, the initiators and the formed system devices used still have imperfections, mainly manifested in: directly connecting an electric detonator to the cutting cable attached to the blade for initiation, which cannot achieve synchronous initiation and fracture of multiple blades, resulting in the rotation imbalance of the simulation test machine and malfunction or damage, and cannot form a reliable, systematic and standardized detection technology equipment. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a blade synchronous blasting and cutting device for a casing containment test.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] A blade synchronous blasting and cutting device for casing containment test, comprising a transmission shaft, blades, cutting cords, fixing seats, mounting seats, support rods, detonating assemblies, electric detonating assemblies, signal receiving assemblies, power supplies and remote control assemblies. A number of blades are equidistantly distributed and connected to the shaft wall of the transmission shaft. The mounting seat is connected to the bottom of the transmission shaft and rotates with the transmission shaft. The number of the support rods, fixing seats, cutting cords and detonating assemblies is equal to the number of blades to be cut. One end of each support rod is connected to the side wall of the mounting seat, and the other end extends to the bottom of the blade. The fixing seat is connected to the surface of the blade to be cut. The cutting cord abuts between the fixing seat and the blade to be cut. The electric detonating assembly is arranged in the mounting seat. The signal receiving assembly is arranged on the mounting seat. The detonating assembly is arranged in the support rod and its two ends are respectively connected to the electric detonating assembly and the cutting cord. The electric detonating assembly, the signal receiving assembly and the power supply are electrically connected. The remote control assembly is connected to the signal receiving assembly through radio signals.

[0008] Preferably, the cutting cord is of a V-shaped shaped charge structure, and its shell is made of copper or lead-antimony alloy material, and the central charge is a single-component high explosive such as cyclonite or octogen.

[0009] Preferably, a first connection hole is formed in the blade. The fixing seat includes a connecting portion and a buckling portion. The buckling portion is an arc-shaped plate, and the connecting portion is a flat plate. A second connection hole is formed in the connecting portion. The connecting portion and the buckling portion are integrated. The connecting portion can be connected to the surface of the blade through bolts in cooperation with the first connection hole and the second connection hole. The buckling portion buckles on the surface of the blade. The cutting cord abuts between the arc-shaped plate of the buckling portion and the blade to be cut.

[0010] Preferably, the detonating assembly is a detonating cord, and the detonating cord is a silver-shell detonating cord with a charge density < 1 g / m.

[0011] Preferably, the electric detonating assembly includes an electric detonator. One end of all detonating cords is connected to the electric detonator, and the other end is respectively connected to each cutting cord. The electric detonator is electrically connected to the power supply.

[0012] Preferably, the electric detonating assembly includes an expanding head, and the expanding head is connected between the electric detonator and the detonating cord. One end of all detonating cords is connected in parallel in the expanding head.

[0013] Preferably, the electric detonating assembly includes an electric igniter and a flame detonator. The electric igniter is electrically connected to the power supply for igniting the flame detonator. One end of all detonating cords is connected to the flame detonator, and the other end is respectively connected to each cutting cord. The electrical performance meets the following requirements: bridge resistance 0.9 Ω - 1.1 Ω; firing current 5 A - 10 A; safety performance no firing at 50 mA / 5 min.

[0014] Preferably, a rotational speed sensor is provided on the transmission shaft to detect the rotational speed of the transmission shaft. The rotational speed sensor is electrically connected to a signal receiving component to convert the detected rotational speed into an electrical signal and send it to the signal receiving component. When the signal receiving component receives the rotational speed detected by the rotational speed sensor and reaches the set rotational speed, it controls the power supply to output a working current to make the electric initiating component ignite and detonate.

[0015] Preferably, the electric initiating component includes a security mechanism and an electric detonator. One end of all the detonating cords is connected to the electric detonator, and the other ends are respectively connected to each cutting cord. The electric detonator is electrically connected to the power supply. The security mechanism is connected between the electric detonator and the detonating cord to cut off or connect the connection relationship between the electric detonator and the detonating cord. The rotational speed sensor is electrically connected to the security mechanism to convert the detected rotational speed into an electrical signal and send it to the security mechanism. When the security mechanism receives the rotational speed detected by the rotational speed sensor and reaches the set rotational speed, it connects the electric detonator and the detonating cord.

[0016] Advantages of the present utility model

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] The present utility model uses wireless signal transmission for detonation to complete remote detonation, which is safe and reliable; through the detonating component, multiple cutting cords are detonated synchronously to complete the synchronous detonation of multiple blades, avoiding the imbalance caused by the sequential fracture of multiple blades and resulting in the failure of the test. Description of the drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a cross-sectional view of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the connection of the cutting cord, detonating component, and electric initiating component of the present utility model. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "set / sleeved with", "socket connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a blade synchronous blasting and cutting device for casing containment test, including a transmission shaft 1, blades 2, cutting cables 3, fixed seats 4, mounting seats 5, support rods 6, detonating assemblies 7, electric detonating assemblies 8, signal receiving assemblies 9, a power source and a remote control assembly. A number of blades 2 are equidistantly distributed and connected to the shaft wall of the transmission shaft 1. The mounting seat 5 is connected to the bottom of the transmission shaft 1 and rotates with the transmission shaft 1. The number of the support rods 6, fixed seats 4, cutting cables 3, and detonating assemblies 7 is equal to the number of blades 2 to be cut. One end of the support rod 6 is connected to the side wall of the mounting seat 5, and the other end extends to the bottom of the blade 2. The fixed seat 4 is connected to the surface of the blade 2 to be cut. The cutting cable 3 abuts between the fixed seat 4 and the blade 2 to be cut. The electric detonating assembly 8 is arranged in the mounting seat 5. The signal receiving assembly 9 is arranged on the mounting seat 5. The detonating assembly 7 is arranged in the support rod 6 and its two ends are respectively connected to the electric detonating assembly 8 and the cutting cable 3. The electric detonating assembly 8, the signal receiving assembly 9, and the power source are electrically connected. The remote control assembly is wirelessly connected to the signal receiving assembly 9.

[0026] During use, the cutting cable is fixed on the surface of the blade 2 according to the design requirements. When the rotational speed of the transmission shaft simulating the aircraft engine reaches the set speed, the operator sends a wireless signal command to the signal receiving component 9 through the remote control component. After receiving the command, the signal receiving component 9 controls the power supply to output the working current to make the electric initiating component 8 detonate, and then synchronously detonates each cutting cable 3 through the multi-channel detonating component 7. The high-temperature and high-pressure jets generated by each cutting cable 3 cut through the blade 2 to be cut, thereby sharply weakening the strength of the blade 2. Under the action of centrifugal force, the blade 2 breaks and flies off, achieving the purpose of the simulation test.

[0027] The utility model adopts wireless signal transmission for initiation to complete remote initiation, which is safe and reliable; through the detonating component 7, multiple cutting cables are synchronously detonated to complete the synchronous initiation of multiple blades, avoiding the imbalance caused by the successive fracture of multiple blades and resulting in the failure of the test.

[0028] Specifically, the cutting cable has a V-shaped shaped charge structure, and its shell is made of copper or lead-antimony alloy material, and the central charge is a single-component high explosive such as cyclotrimethylenetrinitramine or octogen.

[0029] Further, a first connection hole 21 is formed on the blade 2. The fixing seat 4 includes a connecting portion and a fastening portion. The fastening portion is an arc-shaped plate, and the connecting portion is a flat plate. A second connection hole 41 is formed on the connecting portion. The connecting portion and the fastening portion are integrated with each other. The connecting portion can be connected to the surface of the blade 2 through bolts in cooperation with the first connection hole 21 and the second connection hole 41. The fastening portion is fastened to the surface of the blade 2. The cutting cable 3 abuts between the arc-shaped plate of the fastening portion and the blade 2 to be cut, which is convenient for fixing the cutting cable 3. During specific installation, threads can be tapped on the first connection hole 21 and the second connection hole 41 for convenient bolt installation, or self-tapping screws can be directly used to connect the first connection hole 21 and the second connection hole 41.

[0030] Specifically, the detonating component 7 is a detonating cord, and the detonating cord is a silver shell detonating cord with a charge density < 1 g / m.

[0031] Specifically, the electric initiating component 8 includes an electric detonator 81. One end of all detonating cords is connected to the electric detonator 81, and the other end is respectively connected to each cutting cable 3. The electric detonator 81 is electrically connected to the power supply, thereby realizing detonation transmission.

[0032] Further, the electric initiating component 8 includes an expanding head 82. The expanding head 82 is connected between the electric detonator 81 and the detonating cord. One end of all detonating cords is connected in parallel within the expanding head 82 to ensure reliable detonation transmission.

[0033] Further, the electric initiation assembly 8 includes an electric igniter and a flame detonator. The electric igniter is electrically connected to a power source for igniting the flame detonator. One end of all the detonating cords is connected to the flame detonator, and the other ends are respectively connected to the respective cutting cords 3 to achieve detonation transfer. The electrical performance meets the following requirements: the bridge resistance is 0.9 Ω - 1.1 Ω; the firing current is 5 A - 10 A; the safety performance is no firing at 50 mA / 5 min.

[0034] Further, a rotational speed sensor is provided on the transmission shaft 1 for detecting the rotational speed of the transmission shaft 1. The rotational speed sensor is electrically connected to the signal receiving assembly 9 for converting the detected rotational speed into an electrical signal and sending it to the signal receiving assembly 9. When the signal receiving assembly 9 receives the rotational speed of the transmission shaft 1 detected by the rotational speed sensor reaching the set rotational speed, it controls the power source to output a working current to make the electric initiation assembly 8 fire and initiate, thereby realizing automatic initiation.

[0035] Further, the electric initiation assembly 8 includes a security mechanism and an electric detonator 81. One end of all the detonating cords is connected to the electric detonator 81, and the other ends are respectively connected to the respective cutting cords 3. The electric detonator 81 is electrically connected to the power source. The security mechanism is connected between the electric detonator 81 and the detonating cord for cutting off or connecting the connection relationship between the electric detonator 81 and the detonating cord. The rotational speed sensor is electrically connected to the security mechanism for converting the detected rotational speed into an electrical signal and sending it to the security mechanism. When the security mechanism receives the rotational speed of the transmission shaft 1 detected by the rotational speed sensor reaching the set rotational speed, it connects the electric detonator 81 and the detonating cord, thereby performing insurance and avoiding the test failure caused by the operator accidentally touching the remote control assembly when the transmission shaft 1 does not reach the set rotational speed.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blade synchronous blasting and cutting device for casing containment test, characterized in that It includes a drive shaft (1), blades (2), cutting cables (3), fixing seats (4), mounting seats (5), support rods (6), detonating assemblies (7), electric detonating assemblies (8), signal receiving assemblies (9), a power source and a remote control assembly. A number of blades (2) are evenly distributed and connected to the shaft wall of the drive shaft (1). The mounting seat (5) is connected to the bottom of the drive shaft (1) and rotates with the drive shaft (1). The numbers of the support rods (6), fixing seats (4), cutting cables (3), and detonating assemblies (7) are equal to the number of blades (2) to be cut. One end of the support rod (6) is connected to the side wall of the mounting seat (5), and the other end extends to the bottom of the blade (2). The fixing seat (4) is connected to the surface of the blade (2) to be cut. The cutting cable (3) abuts between the fixing seat (4) and the blade (2) to be cut. The electric detonating assembly (8) is arranged in the mounting seat (5). The signal receiving assembly (9) is arranged on the mounting seat (5). The detonating assembly (7) is arranged in the support rod (6) and its two ends are respectively connected to the electric detonating assembly (8) and the cutting cable (3). The electric detonating assembly (8), signal receiving assembly (9), and power source are electrically connected. The remote control assembly is connected to the signal receiving assembly (9) through radio signals.

2. The blade synchronous blasting and cutting device for casing containment test according to claim 1, characterized in that The cutting cable is a V-shaped shaped charge structure, and its shell is made of copper or lead-antimony alloy material, and the central charge is cyclotrimethylenetrinitramine or octogen single-component high explosive.

3. A blade synchronous blasting and cutting device for a casing containment test according to claim 1, characterized in that, A first connection hole (21) is formed in the blade (2). The fixing seat (4) includes a connecting portion and a fastening portion. The fastening portion is an arc-shaped plate, and the connecting portion is a flat plate. A second connection hole (41) is formed in the connecting portion. The connecting portion and the fastening portion are integrated. The connecting portion can be connected to the surface of the blade (2) through bolts in cooperation with the first connection hole (21) and the second connection hole (41). The fastening portion is fastened to the surface of the blade (2). The cutting cable (3) abuts between the arc-shaped plate of the fastening portion and the blade (2) to be cut.

4. A blade synchronous blasting and cutting device for a casing containment test according to claim 1, characterized in that, The detonating assembly (7) is a detonating cord, and the detonating cord is a silver shell detonating cord with a charge density < 1 g / m.

5. A blade synchronous blasting and cutting device for a casing containment test, characterized in that The electric detonating assembly (8) includes an electric detonator (81). One end of all the detonating cords is connected to the electric detonator (81), and the other ends are respectively connected to the respective cutting cables (3). The electric detonator (81) is electrically connected to the power source.

6. The blade synchronous blasting and cutting device for a casing containment test according to claim 5, characterized in that, The electric detonating assembly (8) includes an expanding head (82). The expanding head (82) is connected between the electric detonator (81) and the detonating cord. One end of all the detonating cords is connected in parallel in the expanding head (82).

7. A blade synchronous blasting and cutting device for a casing containment test according to claim 4, characterized in that The electric detonating assembly (8) includes an electric igniter and a flame detonator. The electric igniter is electrically connected to the power source for igniting the flame detonator. One end of all the detonating cords is connected to the flame detonator, and the other ends are respectively connected to the respective cutting cables (3). The electrical performance meets the following requirements: bridge resistance 0.9 Ω - 1.1 Ω; firing current 5 A - 10 A; safety performance no firing at 50 mA / 5 min.

8. A blade synchronous blasting and cutting device for a casing containment test, characterized in that, A speed sensor is provided on the transmission shaft (1) for detecting the rotational speed of the transmission shaft (1). The speed sensor is electrically connected to a signal receiving component (9) for converting the detected rotational speed into an electrical signal and sending it to the signal receiving component (9). When the signal receiving component (9) receives the rotational speed detected by the speed sensor of the transmission shaft (1) reaching the set rotational speed, it controls the power supply to output a working current to make the electric initiation component (8) ignite and explode.

9. A blade synchronous blasting and cutting device for a casing containment test, characterized in that, The electric initiation component (8) includes a security mechanism and an electric detonator (81). One end of all detonating cords is connected to the electric detonator (81), and the other ends are respectively connected to each cutting cord (3). The electric detonator (81) is electrically connected to the power supply. The security mechanism is connected between the electric detonator (81) and the detonating cord for cutting off or connecting the connection relationship between the electric detonator (81) and the detonating cord. The speed sensor is electrically connected to the security mechanism for converting the detected rotational speed into an electrical signal and sending it to the security mechanism. When the security mechanism receives the rotational speed detected by the speed sensor of the transmission shaft (1) reaching the set rotational speed, it connects the electric detonator (81) and the detonating cord.

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