CN114993112A

CN114993112A - Charging structure for safely separating metal plates

Info

Publication number: CN114993112A
Application number: CN202210646741.1A
Authority: CN
Inventors: 王猛; 陈刚; 朱宇; 赵盟乔; 王杰春
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-02

Abstract

The invention relates to a charging structure for safely separating metal plates. The metal plate is symmetrically provided with two through round holes along the lateral center, a buffer layer is arranged in the round holes, and explosive is arranged in the buffer layer and is detonated by a detonating cord. The invention has the advantages that: the method can fully utilize the energy of the explosive, achieve the aim of separating the metal plates under the condition of less explosive consumption, and has no redundant additional energy.

Description

Charging structure for safely separating metal plates

The technical field is as follows:

the invention relates to the field of explosive processing, in particular to a charging structure for safely separating metal plates.

Background art:

when an aircraft engine is impacted by an object such as a bird under the condition of high-speed rotation, one or more blades are broken and fall off, namely FBO (Fanblade off). The fallen blades can impact the casing at high speed under the action of centrifugal force, and the casing is seriously damaged. If the casing does not successfully contain the fallen blades, the blades can puncture the casing, damage pipelines and even puncture a passenger cabin, so that serious accidents of machine damage and people death are caused. Therefore, the test for the containing of the case of the aircraft engine has important significance for shaping the engine and obtaining the airworthiness of the aircraft. The aero-engine case containment test requires that the blades be separated at a specific speed and angle and that as little excess kinetic energy as possible be imparted. The explosion method is prepared to achieve the purpose, and a further idea is provided for the aero-engine case containment test.

The invention content is as follows:

the purpose of the invention is as follows: the charging structure for safely separating the metal plates is provided, and the purpose of separating the metal plates is achieved by using less explosive. The explosion separation device can be used as a means for explosion separation of metal plates, and provides a further idea for the containment test of the aircraft engine casing.

The invention adopts the following technical scheme for realizing the purpose of the invention:

the utility model provides a loaded constitution of sheet metal safety separation, includes sheet metal, detonating cord, explosive, connector, buffer layer. The lateral center of the metal plate is provided with symmetrical round holes, the round holes are internally provided with buffer layers, and explosives are placed in the buffer layers and are not coupled to charge. The uncoupled explosive loading structure is an explosive loading structure with the explosive loading diameter smaller than the diameter of the blast hole and a gap between the explosive loading and the blast hole wall, and the explosive is initiated by the detonating cord. The buffer layer between the explosive and the blast hole wall is formed by a paper tube.

Detonation waves generated when the double-hole explosive is exploded can collide together when being transmitted to the lateral center to generate reflection, so that the power of the explosive can be enhanced, and metal plates can be better separated.

Compared with the prior art, the charging structure provided by the invention has the beneficial effects that: the using amount of the explosive can be reduced, the explosion energy of the explosive is fully utilized, the plates are just separated safely without redundant power, and the safety of the test is ensured.

Description of the drawings:

fig. 1 is a front view of a safely separated charge structure of a metal sheet.

Fig. 2 is a side view of a safely separated charge structure of sheet metal.

Fig. 3 is a top view of a charge structure with a metal sheet safely separated.

In the figure: 1-a metal plate; 2-detonating cord; 3-an explosive; 4-buffer layer.

The specific implementation mode is as follows:

example one

Referring to fig. 2, the metal plate 1 is a titanium alloy plate with a length of 100mm, a width of 80mm and a height of 23 mm.

Referring to fig. 1, two through round holes are symmetrically formed in a metal plate 1 along the lateral center, the diameter of each round hole is 5mm, the thickness of the plate between the two holes is 5.6mm, and the thickness of an edge plate is 3.7 mm. The buffer layer 4 is a paper tube with the length of 100mm and the thickness of 0.2mm, and the buffer layer 4 is placed in the two round holes of the plate 1. The explosive 3 is filled with hexogen with the length of 100mm and is detonated by the detonating cord 2.

According to the above embodiment, the explosive 3 is detonated by the detonating cord 2, and the detonation waves of the explosive in the two holes are partially propagated to the edge and partially propagated to the middle and interacted with each other in the middle, and safely separate the plate 1 together with the high-temperature and high-pressure gas generated by the explosion without residual kinetic energy.

Compared with the existing charging structure for separating the metal plates, the invention can better utilize the energy of the explosive and more accurately and safely separate the metal plates under the condition of less explosive consumption.

Claims

1. The utility model provides a loaded constitution of sheet metal safety separation, includes panel, detonating cord, explosive, buffer layer. A buffer layer is arranged in the round hole, and explosive is arranged in the buffer layer and is detonated by a detonating cord.

2. A sheet metal security separation charge configuration according to claim 1, wherein: two through round holes are symmetrically formed along the lateral center of the plate, and the thickness of the plate between the two round holes is larger than or equal to the thickness from the round holes to the surface of the plate.

3. A sheet metal security separation charge configuration as claimed in claim 1, wherein lateral dual hole charging is used, with superposition of detonation waves of explosive blasts in the dual holes, to better separate the sheets.

4. A sheet metal security separation charge configuration according to claim 1, characterized in that a non-coupled charge configuration is used, and the thickness of the buffer layer is varied according to the actual requirements for varying the amount of charge.