Explosive winding core mold structure of non-mandrel contact grain and forming method of explosive winding core mold structure
By adopting a drug-wrapped core mold structure with non-mandaxle contact medicine columns in solid rocket engines, and using tongue-and-groove fit and step structure, the problems of uneven force and slip during traditional winding are solved, and the molding quality and safety are improved.
Patent Information
- Application Number
- CN202510445911.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-06-06
AI Technical Summary
In traditional solid rocket engines, the medicine column and the mandrel are prone to problems such as uneven stress and inter-structure slippage during the winding process, which affects the forming quality and increases safety risks.
A medicine-wrapped core mold structure with non-mand shaft contact medicine column is adopted. Through the cylinder section insulation layer, rear seal insulation layer, front joint assembly, rear joint assembly, front sleeve, rear sleeve and winding mandrel, a non-direct contact structure is formed. The tongue-and-groove fit and step structure are used to limit relative rotation and displacement, ensuring the gap between the medicine column and the winding mandrel.
It effectively solves the problems of uneven stress and slippage between structures during the winding process of the medicine column core mold, improves molding quality and safety, and reduces the safety risks of pyrotechnic products.
Smart Images
Figure CN120100601A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of solid rocket engines, and in particular relates to a non-core-shaft-contacting charge winding core mold structure with charge and a molding method thereof. Background Art
[0002] The weight-reducing advantages brought by the high specific strength and high specific modulus of fiber-wound composite materials have made them gradually replace metal materials and become the preferred material for the combustion chamber shell of solid rocket engines. The engine composite shell is usually manufactured and formed using an ablative core mold in conjunction with a fiber winding process. The shell is then loaded with propellant to form a combustion chamber structure. The overall process is complicated and the quality inspection of the propellant column is difficult. In response to the application problems of composite shells in the field of traditional solid rocket engines, the propellant column fiber winding technology uses the pre-prepared propellant column as a winding core mold and directly performs fiber winding molding to obtain a complete combustion chamber structure.
[0003] In the current common core mold structure with charge winding, the charge column and the mandrel are in direct contact and coordination in terms of structural form. This leads to problems such as uneven force on the core mold and relative slippage between structures during the winding process, which affect the molding quality. At the same time, the stability of the charge column is reduced, increasing the safety risk of the process. Summary of the invention
[0004] In order to solve the above problems, the present invention provides a drug-carrying winding core mold structure without a core shaft contacting a drug column and a molding method thereof.
[0005] The specific technical solutions of the present invention are as follows:
[0006] A non-core shaft contacting charge winding core mold structure with charge, comprising a charge assembly, a barrel section insulation layer, a rear end insulation layer, a front joint assembly, a rear joint assembly, a front sleeve, a rear sleeve and a winding core shaft, a fiber winding layer, a front plugging piece, and a rear plugging piece;
[0007] The drug column assembly is a combined structure, including a drug column and a drug column insulation layer;
[0008] The inner profile of the grain assembly is in the form of an axial through hole, and the outer profile is consistent with the inner profiles of the barrel insulation layer and the rear head insulation layer;
[0009] The front joint assembly includes a front joint and a front joint insulation layer, which is placed on the outer surface of the front end of the barrel insulation layer;
[0010] The rear joint assembly includes a rear joint and a rear joint insulation layer, which is placed on the rear end outer side of the rear end insulation layer;
[0011] The front joint, the front joint insulation layer, the rear joint, and the rear joint insulation layer are all prefabricated;
[0012] The winding mandrel is located in the through hole of the drug column assembly and is assembled and limited with the barrel insulation layer and the rear head insulation layer;
[0013] The front sleeve and the winding mandrel form axial matching and limiting;
[0014] The rear sleeve forms axial cooperation and limitation with the winding mandrel to form a winding mandrel mold structure and state.
[0015] Furthermore, the thermal insulation layer of the drug column is made of soft thermal insulation material, which is covered on the surface of the drug column and solidified.
[0016] Furthermore, the rear end of the barrel insulation layer and the front end of the rear head insulation layer are both radially and axially interlocking matching structures. The two are embedded in each other during assembly, and the relative rotation of the two is restricted during winding.
[0017] Furthermore, the winding mandrel is provided with tenon-type protrusion structures on the front step and the rear end surface, which are respectively embedded and matched with the internal groove-type notch at the front end of the barrel section insulation layer and the internal groove-type notch at the rear end of the rear head insulation layer.
[0018] Furthermore, the winding mandrel column section and the inner hole of the drug column are in a non-direct contact structure, and a gap is reserved between the two.
[0019] Furthermore, a step structure is provided inside the front sleeve, and the step structure presses the front end step of the winding mandrel to form axial fit and limitation.
[0020] Furthermore, the rear sleeve presses the rear end face of the winding mandrel through the inner side to form axial fit and limit, and the overall axial displacement of the winding mandrel is limited.
[0021] Furthermore, the front blocking piece is in the form of a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded and matched with the internal groove-type notch of the front section of the insulation layer of the barrel section to form assembly and limitation.
[0022] Furthermore, the rear plugging piece is in the form of a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded and matched with the internal groove-type notch at the rear end of the rear head insulation layer to form assembly and limitation.
[0023] A method for forming a medicine-carrying winding core mold structure without a core shaft contacting a medicine column, the specific steps are as follows:
[0024] S1: After the drug column assembly is installed into the barrel insulation layer, the rear end insulation layer is then installed. Both sides of the barrel insulation layer and the rear end insulation layer are provided with radial and axial interlocking matching structures to limit the assembly of the two.
[0025] S2: insert the winding mandrel from the axial through hole of the drug column assembly, and set a tongue-and-groove axial matching structure at the matching position between the winding mandrel and the barrel insulation layer and the rear end insulation layer, and respectively fit with the inner groove notch at the front end of the barrel insulation layer and the inner groove notch at the rear end of the rear end insulation layer;
[0026] S3: The front sleeve is installed into the front joint from the front end of the winding core mold, and the front sleeve forms an axial fit and limit with the winding core shaft; at the same time, the rear sleeve is installed into the rear joint from the rear end of the winding core mold, and the rear sleeve forms an axial fit and limit with the winding core shaft, forming a winding core mold structure and state;
[0027] S4: the outer surface of the winding core mold is subjected to a fiber winding molding process according to a predetermined winding system, and the fiber winding layer is formed after solidification;
[0028] S5: Remove the front sleeve, rear sleeve and winding mandrel in sequence, install the front plugging piece into the front end of the barrel section insulation layer, the front plugging piece is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the front end of the barrel section insulation layer to form an assembly and limit position; install the rear plugging piece into the rear end of the rear head insulation layer, the rear plugging piece is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the rear end of the rear head insulation layer to form an assembly and limit position, thereby forming a complete combustion chamber structure.
[0029] The beneficial effects of the present invention are as follows:
[0030] (1) The present invention solves the problems of uneven force on the core mold of the grain during the winding process and easy slippage of the core mold, thereby ensuring the molding quality of the composite material shell wound with the grain fibers.
[0031] (2) The present invention improves the safety control of the powder column fiber winding process and further reduces the safety risk of explosives with powder winding technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0033] Figure 1 It is a schematic diagram of the structure of the core mold state of the grain.
[0034] Figure 2 It is a schematic diagram of the combustion chamber state structure.
[0035] Figure 3 Schematic diagram of the insulation layer structure of the cylinder section.
[0036] Figure 4 Schematic diagram of the rear head insulation layer structure.
[0037] Figure 5 Schematic diagram of the winding mandrel structure.
[0038] Figure 6 It is a schematic diagram of the structure of the front sleeve (left picture) and the rear sleeve (right picture).
[0039] Figure 7 It is a schematic diagram of the structure of the front blocking plate (left picture) and the rear blocking plate (right picture).
[0040] The accompanying drawings are marked as follows: 1 is the grain; 2 is the grain insulation layer; 3 is the barrel insulation layer; 4 is the rear head insulation layer; 5 is the front joint; 6 is the front joint insulation layer; 7 is the rear joint; 8 is the rear joint insulation layer; 9 is the front sleeve; 10 is the rear sleeve; 11 is the winding mandrel; 12 is the fiber winding layer; 13 is the front plugging plate; 14 is the rear plugging plate.
[0041] Specific implementation methods
[0042] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention 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 invention.
[0043] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0044] A non-core-contacting charge winding core mold structure comprises a charge assembly, a barrel insulation layer (3), a rear end insulation layer (4), a front joint assembly, a rear joint assembly, a front sleeve (9), a rear sleeve (10), a winding core shaft (11), a fiber winding layer (12), a front plugging plate (13), and a rear plugging plate (14).
[0045] refer to Figure 1 and Figure 2As shown, the drug column assembly is a combined structure, including a drug column (1) and a drug column insulation layer (2); the inner profile of the drug column assembly is in the form of an axial through hole, and the outer profile is consistent with the inner profiles of the barrel insulation layer (3) and the rear head insulation layer (4); the front joint assembly includes a front joint (5) and a front joint insulation layer (6), which are placed on the outer profile of the front end of the barrel insulation layer (3); the rear joint assembly includes a rear joint (7) and a rear joint insulation layer (8), which are placed on the rear head insulation layer (4) The rear end outer end face; the front joint (5), the front joint insulation layer (6), the rear joint (7), and the rear joint insulation layer (8) are all prefabricated; the winding mandrel (11) is located in the through hole of the drug column assembly, and is assembled and limited with the barrel insulation layer (3) and the rear head insulation layer (4); the front sleeve (9) and the winding mandrel (11) form an axial fit and limit; the rear sleeve (10) and the winding mandrel (11) form an axial fit and limit, forming a winding core mold structure and state.
[0046] The drug column insulation layer (2) is made of soft insulation material, which is covered on the surface of the drug column (1) and solidified; the barrel section insulation layer (3) and the rear head insulation layer (4) are made of hard insulation material; the column section of the winding mandrel (11) and the inner hole of the drug column (1) are in a non-direct contact structure, and a gap is reserved between the two. In this solution, a gap of 0.5 mm is reserved.
[0047] refer to Figure 3 and Figure 4 As shown, the barrel insulation layer (3) and the rear end insulation layer (4) are both made of hard insulation materials, and the internal surface dimensions are consistent with the charge column assembly. The rear end of the barrel insulation layer (3) and the front end of the rear end insulation layer (4) are both radially and axially interlocking matching structures. When assembled, the two are embedded in each other, and the relative rotation of the two is restricted during winding.
[0048] refer to Figure 5 As shown, the winding mandrel (11) is provided with tenon-type protrusion structures on the front step and the rear end surface, which are respectively embedded and matched with the internal groove-type notch of the front end of the barrel section insulation layer (3) and the internal groove-type notch of the rear end of the rear head insulation layer (4).
[0049] refer to Figure 6 As shown, a step structure is provided inside the front sleeve (9), and the step structure presses the front end step of the winding mandrel (11) to form axial fit and limit; the rear sleeve (10) presses the rear end face of the winding mandrel (11) through the inner side to form axial fit and limit, and the overall axial displacement of the winding core mold is limited.
[0050] refer to Figure 7 As shown in (left side), the front blocking piece (13) is a circular thin plate with a tenon-type protrusion, which is embedded and matched with the groove-type notch inside the front section of the barrel section insulation layer (3) through the tenon-type protrusion to form an assembly and limit position.
[0051] refer to Figure 7 As shown in (right side), the rear plugging piece (14) is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the rear end of the rear head insulation layer (4) to form an assembly and limit position.
[0052] See also Figure 1 As shown, the embodiment of the present invention also provides a method for forming a non-contact drug column with a drug winding core mold structure, and the specific steps are as follows:
[0053] S1: After the drug column assembly is installed into the barrel section insulation layer (3), the rear end insulation layer (4) is then installed, and radial and axial interlocking matching structures are provided on both sides of the matching position of the barrel section insulation layer (3) and the rear end insulation layer (4) to limit the assembly of the two;
[0054] S2: inserting the winding mandrel (11) from the axial through hole of the drug column assembly, and providing tongue-and-groove type axial matching structures at the matching positions of the winding mandrel (11) and the barrel section insulation layer (3) and the rear end insulation layer (4), so as to be respectively embedded and matched with the internal groove notch at the front end of the barrel section insulation layer (3) and the internal groove notch at the rear end of the rear end insulation layer (4);
[0055] S3: The front sleeve (9) is installed from the front end of the winding core mold into the interior of the front joint (5), and the front sleeve (9) forms an axial fit and limit position with the winding core shaft (11); at the same time, the rear sleeve (10) is installed from the rear end of the winding core mold into the interior of the rear joint (7), and the rear sleeve (10) forms an axial fit and limit position with the winding core shaft (11), thereby forming a winding core mold structure and state;
[0056] S4: the outer surface of the winding core mold is subjected to a fiber winding molding process according to a predetermined winding system, and the fiber winding layer (12) is formed after solidification;
[0057] S5: Remove the front sleeve (9), the rear sleeve (10) and the winding mandrel (11) in sequence, install the front plugging piece (13) into the front end of the barrel section insulation layer (3), the front plugging piece (13) is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the front end of the barrel section insulation layer (3) to form an assembly and limit position; install the rear plugging piece (14) into the rear end of the rear head insulation layer (4), the rear plugging piece (14) is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the rear end of the rear head insulation layer (4) to form an assembly and limit position, thereby forming a complete combustion chamber structure.
[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.
[0059] The embodiments of the present invention described above are only used to help explain the present invention. These embodiments are selected and specifically described in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification, which all belong to the protection scope of the present invention.
Claims
1. A non-core-contacting charge winding mandrel structure, characterized in that: It comprises a charge column assembly, a barrel section insulation layer (3), a rear end insulation layer (4), a front joint assembly, a rear joint assembly, a front sleeve (9), a rear sleeve (10), a winding mandrel (11), a fiber winding layer (12), a front plugging plate (13), and a rear plugging plate (14); The drug column assembly is a combined structure, comprising a drug column (1) and a drug column insulation layer (2); The inner profile of the drug column assembly is in the form of an axial through hole, and the outer profile is consistent with the inner profiles of the barrel insulation layer (3) and the rear head insulation layer (4); The front joint assembly comprises a front joint (5) and a front joint insulation layer (6), which are placed on the front outer surface of the barrel section insulation layer (3); The rear joint assembly comprises a rear joint (7) and a rear joint insulation layer (8), which are placed on the rear end outer side surface of the rear end sealing insulation layer (4); The front joint (5), the front joint insulation layer (6), the rear joint (7), and the rear joint insulation layer (8) are all prefabricated; The winding mandrel (11) is located in the through hole of the drug column assembly and is assembled and limited with the barrel section insulation layer (3) and the rear head insulation layer (4); The front sleeve (9) and the winding mandrel (11) form axial matching and limiting; The rear sleeve (10) and the winding mandrel (11) form axial matching and limiting, forming a winding mandrel mold structure and state.
2. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The drug column heat insulation layer (2) is made of a soft heat insulation material and is covered on the surface of the drug column (1) and solidified into shape.
3. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The rear end of the barrel section insulation layer (3) and the front end of the rear end insulation layer (4) are both radially and axially interlocking matching structures. The two are embedded in each other during assembly, and the relative rotation of the two is restricted during winding and forming.
4. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The winding mandrel (11) is provided with tenon-type protrusion structures on the front step and the rear end surface, which are respectively embedded and matched with the internal groove-type notch of the front end of the barrel section insulation layer (3) and the internal groove-type notch of the rear end of the rear end insulation layer (4).
5. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The column section of the winding mandrel (11) and the inner hole of the medicine column (1) are in a non-direct contact structure, and a gap is reserved between the two.
6. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: A step structure is provided inside the front sleeve (9), and the step structure presses the front end step of the winding mandrel (11) to form axial fit and limit.
7. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The rear sleeve (10) presses the rear end surface of the winding mandrel (11) through the inner side to form axial fit and limit, and the overall axial displacement of the winding mandrel is limited.
8. The non-core-contacting charge-carrying winding mandrel structure according to claim 1 is characterized in that: The front blocking plate (13) is in the form of a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded and matched with the groove-type notch inside the front section of the barrel section insulation layer (3) to form assembly and limit.
9. The non-core-contacting charge-carrying winding mandrel structure according to claim 1, characterized in that: The rear blocking piece (14) is in the form of a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the rear end of the rear end heat insulation layer (4) to form an assembly and limit position.
10. A method for forming a non-core-contacting charge-carrying winding core mold structure as claimed in claim 1, characterized in that: The specific steps are as follows: S1: After the drug column assembly is installed into the barrel section insulation layer (3), the rear end insulation layer (4) is then installed, and radial and axial interlocking matching structures are provided on both sides of the matching position of the barrel section insulation layer (3) and the rear end insulation layer (4) to limit the assembly of the two; S2: inserting the winding mandrel (11) from the axial through hole of the drug column assembly, and providing tongue-and-groove type axial matching structures at the matching positions of the winding mandrel (11) and the barrel section insulation layer (3) and the rear end insulation layer (4), so as to be respectively embedded and matched with the internal groove notch at the front end of the barrel section insulation layer (3) and the internal groove notch at the rear end of the rear end insulation layer (4); S3: The front sleeve (9) is installed from the front end of the winding core mold into the interior of the front joint (5), and the front sleeve (9) forms an axial fit and limit position with the winding core shaft (11); at the same time, the rear sleeve (10) is installed from the rear end of the winding core mold into the interior of the rear joint (7), and the rear sleeve (10) forms an axial fit and limit position with the winding core shaft (11), thereby forming a winding core mold structure and state; S4: the outer surface of the winding core mold is subjected to a fiber winding molding process according to a predetermined winding system, and the fiber winding layer (12) is formed after solidification; S5: Remove the front sleeve (9), the rear sleeve (10) and the winding mandrel (11) in sequence, install the front plugging piece (13) into the front end of the barrel section insulation layer (3), the front plugging piece (13) is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the front end of the barrel section insulation layer (3) to form an assembly and limit position; install the rear plugging piece (14) into the rear end of the rear head insulation layer (4), the rear plugging piece (14) is a circular thin plate with a tenon-type protrusion, and the tenon-type protrusion is embedded in the groove-type notch inside the rear end of the rear head insulation layer (4) to form an assembly and limit position, thereby forming a complete combustion chamber structure.