Solid engine embedded wire forming method

Abstract

The invention discloses a solid engine embedded wire forming method, which belongs to the field of engines, and comprises the following steps of: painting an interface adhesive on a bonding surface of a control circuit prefabricated part and an embedded wire area of a solid engine; the control circuit prefabricated part is assembled in place in the solid engine; and pressurizing the control circuit prefabricated member through the air bag at normal temperature, so that the control circuit prefabricated member is fixed at a preset design position. According to the internal wire embedding method adopted by the invention, the performance of the solid engine is promoted to be brought into full play by improving aerodynamic performance, enhancing circuit protection and simplifying the design of the launching device. Compared with a traditional external wiring mode, the internal wire embedding method enables the solid engine to keep efficient thrust and to be more stable and reliable, and powerful guarantee is provided for flight safety of the solid engine.

Description

Technical Field

[0001] The invention relates to the field of engines, and in particular to a method for forming embedded wires in solid engines. Background Art

[0002] Traditional solid engine control circuits use an external routing method, which requires the design of special fixed supports for the fixed control circuits, thereby sacrificing some aerodynamic performance, and the launch device needs to be designed accordingly to adapt to the shape of the solid engine; in addition, the external routing method makes the circuits easily damaged by external forces, easily damaged by aerodynamic high temperatures, and easily interfered by complex electromagnetic environments, which places high demands on the control circuits' resistance to physical damage, high temperature, corrosion, and electromagnetic interference. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for forming embedded wires in a solid motor which is convenient to implement, safe and reliable.

[0004] The technical solution of the present invention to solve the above technical problems is: a method for forming embedded wires in a solid motor, comprising the following steps: S1, applying interface adhesive: applying interface adhesive on the bonding surface of the control circuit prefabricated component and the wire embedding area in the solid engine; S2, assembling the control circuit prefabricated component: assembling the control circuit prefabricated component into place in the solid engine; S3, cold pressing and shaping: pressurizing the control circuit prefabricated component through the air bag at room temperature to fix the control circuit prefabricated component at the predetermined design position.

[0005] In the above-mentioned method for forming wires embedded in a solid engine, in step S1, an interface adhesive is applied to the bonding surface of the control circuit preform and the wire embedding area in the engine, and an auxiliary adhesive is applied at set intervals.

[0006] In the above-mentioned method for forming embedded wires in a solid engine, in the step S1, a wire passing hole is reserved at the same busbar position at the front end and the rear end of the cylindrical section of the solid engine casing, and the control line embedded in the solid engine combustion chamber passes through the wire passing hole; the control line preform is bonded to the straight line between the two wire passing holes in the solid engine.

[0007] In the above-mentioned method for forming embedded wires in a solid motor, in step S1, the control circuit preform includes a control circuit and an insulating material wrapped around the outside of the control circuit, and the distance between the middle part of the control circuit wrapped with the insulating material and the front and rear end wire holes of the solid motor is equal in length.

[0008] In the above-mentioned method for forming embedded wires in a solid motor, in step S1, the cross-section of the control circuit preform is crescent-shaped, which is conducive to the bonding surface of the control circuit preform fitting with the inner wall of the solid motor, and bulging and air inclusion.

[0009] In the above-mentioned method for forming embedded wires in a solid engine, in step S2, the control circuit prefabricated part is assembled in place in the solid engine, and the tooling is installed in place to complete the assembly of the control circuit prefabricated part; the specific process is: First, align and fix the front end of the control circuit preform with one end of the tooling; then work together to send the control circuit preform and the tooling to the predetermined position in the solid engine, ensure that the wiring harness in the control circuit preform is directly opposite the front and rear end wire holes, the control circuit preform and the two wire holes are kept in the same straight line, the front and rear ends of the control circuit wrapped with insulation material are just in contact with the two wire holes, and the part of the control circuit not wrapped with insulation material is not exposed in the solid engine; finally, the protruding rectangular blocks at the front and rear ends of the tooling are inserted into the two wire holes.

[0010] In the above-mentioned method for forming embedded wires in a solid engine, in step S2, the tooling is a long strip plate, which is used to ensure that the control line preform is straight in the solid engine and to ensure that the control line preform is not moved when the airbag is put in and taken out.

[0011] In the above-mentioned method for forming embedded wires in a solid engine, in step S3, an airbag is sent into the solid engine at room temperature, and after the front and rear ends of the solid engine are sealed, the airbag is inflated, and the pressure of the airbag is used to press and fix the control line preform at a predetermined design position of the solid engine casing.

[0012] In the above-mentioned method for forming embedded wires in a solid engine, in step S3, the tooling is made of tough fiberglass or hard plastic, the length of the main body is equal to the distance between the two wire holes, and protruding rectangular blocks for positioning are provided at both ends of the main body, and the protruding rectangular blocks are inserted into the wire holes.

[0013] In the above-mentioned method for forming wires embedded in a solid motor, in step S3, the control line prefabricated part is fixed into the solid motor casing and then the tooling is removed.

[0014] The beneficial effects of the present invention are as follows: the present invention adopts an internally embedded wire method to replace the external wiring method of the traditional solid engine control circuit, which brings significant beneficial effects, which are specifically embodied in the following aspects: 1. Improve aerodynamic performance: The internal wire embedding method adopted by the present invention does not require additional fixed supports, thereby maintaining the integrity of the solid engine casing, which is beneficial to improving the aerodynamic performance of the solid engine, and further improving the flight efficiency and thrust of the solid engine.

[0015] 2. Enhanced line protection: The present invention buries the control line in the insulation layer. The insulation layer itself has corrosion resistance, and the solid engine casing can resist most electromagnetic interference, thereby effectively protecting the control line from damage by the external environment and improving its resistance to physical damage, high temperature, corrosion and electromagnetic interference.

[0016] 3. Simplify the design of the launch device: The present invention does not require additional design adjustments to the launch device. It only needs to make slight adjustments to the insulation layer to make the control circuit adapt to the high temperature environment in the solid engine, thereby simplifying the design process of the launch device and reducing manufacturing costs.

[0017] 4. Improve the performance of solid engines: The internal wiring method adopted by the present invention promotes the full performance of solid engines by improving aerodynamic performance, enhancing line protection and simplifying the design of the launch device. Compared with the traditional external wiring method, the internal wiring method makes the solid engine more stable and reliable while maintaining efficient thrust, providing a strong guarantee for the flight safety of the solid engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a flow chart of the method for forming wires embedded in a solid rocket.

[0019] Figure 2 It is a schematic longitudinal section diagram after the implementation of the present invention.

[0020] Figure 3 It is a cross-sectional schematic diagram after the implementation of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the tooling. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-Figure 4 As shown, a method for forming a solid motor internal wire includes the following steps: S1, apply interface adhesive: apply interface adhesive 7 on the bonding surface of the control circuit preform and the wire embedding area in the solid engine. The interface adhesive 7 is any adhesive suitable for bonding metal interfaces and non-metal interfaces, and apply auxiliary adhesive 6 at set intervals. The auxiliary adhesive 6 is any adhesive with good bonding performance with the control circuit preform 3 and the interface adhesive 7.

[0024] A wire-passing hole is reserved at the same busbar position at the front end and the rear end of the cylindrical section of the solid engine casing 1, and the control line buried in the solid engine combustion chamber passes through the wire-passing hole; the control line prefabricated part 3 is bonded to the straight line between the two wire-passing holes in the solid engine, which is the predetermined installation position of the control line prefabricated part 3.

[0025] The control circuit preform 3 includes a control circuit 5 and an insulating material 4 wrapped around the outside of the control circuit 5, the tensile strength of the insulating material 4 is ≥8MPa, and the oxyacetylene wire ablation rate is ≤0.05mm / s. The distance between the middle part of the control circuit 5 wrapped with the insulating material and the front and rear end wire holes of the solid engine is equal in length, and the length of the parts of the control circuit 5 at both ends that are not wrapped with the insulating material is not less than 500mm.

[0026] like Figure 3 As shown, the cross section of the control circuit preform 3 is crescent-shaped, which is conducive to the bonding surface of the control circuit preform 3 fitting with the inner wall of the solid engine, and bulging and air inclusion.

[0027] S2, assembling the control circuit prefabricated part 3: assembling the control circuit prefabricated part 3 in place in the solid engine, installing the tooling 2 in place, and completing the assembly of the control circuit prefabricated part 3; the specific process is: First, align and fix the front end of the control circuit preform 3 with one end of the tooling 2; then work together to send the control circuit preform 3 and the tooling 2 to the predetermined position in the solid engine, ensure that the wiring harness in the control circuit preform 3 is directly opposite the front and rear end wire holes, the control circuit preform 3 and the two wire holes are kept in the same straight line, the front and rear ends of the control circuit 5 wrapped with the insulation material 4 are just in contact with the two wire holes, and the control circuit 5 part not wrapped with the insulation material 4 is not exposed in the solid engine; finally, the protruding rectangular blocks at the front and rear ends of the tooling 2 are inserted into the two wire holes.

[0028] The tooling 2 is a long strip plate, which is used to ensure that the control circuit preform 3 is straight in the solid engine and to ensure that the control circuit preform 3 is not moved when the airbag is put in and taken out.

[0029] S3, cold pressing and shaping: In a room temperature environment, the airbag is sent into the solid engine, and after the front and rear ends of the solid engine are sealed, the airbag is inflated, and the control circuit preform 3 is pressed and fixed at the predetermined design position of the solid engine casing 1 by the pressure of the airbag. The airbag pressure is 0.6MPa~0.8MPa.

[0030] like Figure 4 As shown, the tooling 2 is made of tough fiberglass or hard plastic, the length of the main part is equal to the distance between the two wire holes, and is slightly wider than the control circuit preform 3; protruding rectangular blocks for positioning are provided at both ends of the main part, the protruding rectangular blocks are inserted into the wire holes, the width of the protruding rectangular blocks is slightly smaller than the width of the wire holes, and the length of the protruding rectangular blocks is 5mm to 30mm.

[0031] After the control circuit preform 3 is fixed into the solid engine casing 1, the tooling 2 is removed.

Claims

1. A method for forming a wire embedded in a solid rocket engine, characterized in that: The following steps are involved: S1, applying interface adhesive: applying interface adhesive on the bonding surface of the control circuit prefabricated component and the wire embedding area in the solid engine; S2, assembling the control circuit prefabricated component: assembling the control circuit prefabricated component into place in the solid engine; S3, cold pressing and shaping: pressurizing the control circuit prefabricated component through the air bag at room temperature to fix the control circuit prefabricated component at the predetermined design position.

2. The method for forming a solid rocket engine internal wire according to claim 1, characterized in that: In the step S1, the interface adhesive is applied on the bonding surface of the control circuit prefabricated component and the wire embedding area in the engine, and the auxiliary adhesive is applied at set intervals.

3. The method for forming a wire embedded in a solid rocket according to claim 1, characterized in that: In the step S1, a wire passing hole is reserved at the same busbar position at the front end and the rear end of the cylindrical section of the solid engine casing, and the control line embedded in the solid engine combustion chamber passes through the wire passing hole; the control line prefabricated part is bonded to the straight line between the two wire passing holes in the solid engine.

4. The method for forming a wire embedded in a solid rocket according to claim 1, characterized in that: In step S1, the control circuit prefabricated component includes the control circuit and the heat-insulating material wrapped around the outside of the control circuit, and the distance between the middle part of the control circuit wrapped with the heat-insulating material and the front and rear end wire holes of the solid engine are equal in length.

5. The method for forming a wire embedded in a solid rocket according to claim 4, characterized in that: In the step S1, the cross section of the control circuit preform is crescent-shaped, which is conducive to the bonding surface of the control circuit preform being fitted with the inner wall of the solid engine, and bulging and entrapping air.

6. The method for forming a wire embedded in a solid rocket according to claim 1, characterized in that: In step S2, the control circuit prefabricated part is assembled in place in the solid engine, and the tooling is installed in place to complete the assembly of the control circuit prefabricated part; the specific process is: First, align and fix the front end of the control circuit preform with one end of the tooling; then work together to send the control circuit preform and the tooling to the predetermined position in the solid engine, ensure that the wiring harness in the control circuit preform is directly opposite the front and rear end wire holes, the control circuit preform and the two wire holes are kept in the same straight line, the front and rear ends of the control circuit wrapped with insulation material are just in contact with the two wire holes, and the part of the control circuit not wrapped with insulation material is not exposed in the solid engine; finally, the protruding rectangular blocks at the front and rear ends of the tooling are inserted into the two wire holes.

7. The method for forming a wire embedded in a solid rocket according to claim 6, characterized in that: In step S2, the tooling is a long strip plate, which is used to ensure that the control circuit preform is straight in the solid engine and to ensure that the control circuit preform is not moved when the airbag is put in and taken out.

8. The method for forming a wire embedded in a solid rocket according to claim 6, characterized in that: In step S3, at room temperature, the airbag is sent into the solid engine, the front and rear ends of the solid engine are sealed, the airbag is inflated, and the control circuit preform is pressed and fixed at a predetermined design position of the solid engine casing by the pressure of the airbag.

9. The method for forming a wire embedded in a solid rocket according to claim 8, characterized in that: In step S3, the tooling is made of tough fiberglass or hard plastic, the length of the main body is equal to the distance between the two wire holes, and protruding rectangular blocks for positioning are provided at both ends of the main body, and the protruding rectangular blocks are inserted into the wire holes.

10. The method for forming a wire embedded in a solid rocket according to claim 8, characterized in that: In step S3, the control circuit prefabricated component is fixed into the solid engine casing and then the tooling is removed.

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