阅读说明：本技术 一种带药缠绕组合式芯模 (Combined core mold with medicine winding function ) 是由 郑庆 林天一 杨明 陈昌将 李德华 江真 王林祥 鲁昊钺 占冬至 于 2020-09-24 设计创作，主要内容包括：本发明一种带药缠绕组合式芯模,包括：药柱组合件、连接杆(6)、对接螺母(7)、外包覆层(8)、对接塞(9)、轴向密封结构；药柱组合件为两瓣；利用装药芯模实现与推进剂、绝热层一体化成型,满足带药缠绕复合壳体成型需求,该结构通过装药工艺实现绝热层与推进剂型面成型,采用芯柱作为缠绕轴,增强了带药缠绕组合式芯模的强度与刚度,同时满足装药与缠绕需求,避免了带药缠绕组合式芯模结构过于复杂、成型工艺繁琐等问题。(The invention relates to a combined core mould with a medicine winding function, which comprises: the explosive column assembly, a connecting rod (6), a butt joint nut (7), an outer coating layer (8), a butt joint plug (9) and an axial sealing structure; the drug column assembly is two petals; utilize the powder charge mandrel to realize and propellant, heat insulation layer integrated into one piece, satisfy the compound casing shaping demand of area medicine winding, this structure realizes heat insulation layer and propellant profile shaping through the powder charge technology, adopts the stem as the winding axle, has strengthened the intensity and the rigidity of taking medicine winding combination formula mandrel, satisfies powder charge and winding demand simultaneously, has avoided taking medicine winding combination formula mandrel structure too complicated, the loaded down with trivial details scheduling problem of shaping technology.)

1. A tape medicine winding combination formula mandrel which characterized in that includes: the explosive column assembly, a connecting rod (6), a butt joint nut (7), an outer coating layer (8), a butt joint plug (9) and an axial sealing structure;

the drug column assembly is two petals; the two sections of the explosive column assemblies are symmetrically arranged;

each petal of medicinal column assembly comprises: the device comprises a seal head (1), a heat insulation layer (2), a medicine column (3), a seal head nut (4) and a core column (5);

in each section of the explosive column assembly, a heat insulation layer (2) is arranged outside each section of the explosive column (3), an end enclosure (1) is prefabricated on the heat insulation layer (2), an end enclosure nut (4) is fixed on the end enclosure (1) and used for connecting the end enclosure (1) and a core column (5), and each section of the explosive column (3) and the corresponding end enclosure (1), the heat insulation layer (2), the end enclosure nut (4) and the core column (5) form each section of the explosive column (3) assembly;

in each medicinal column assembly, a core column (5) is fixed on an end socket (1) through an end socket nut (4); an axial sealing structure is arranged between the core column (5) and the end socket (1), and a winding tool connecting interface is reserved;

the two-petal explosive column assembly realizes axial restraint and fixation through the matching of a connecting rod (6), a butt joint nut (7) and a butt joint plug (9);

the outer coating layer (8) is coated outside the joint of the heat insulation layers (2) of the two-petal drug column assembly.

2. The medicated winding combined core mold of claim 1, wherein: the explosive column (3) is arranged in the heat insulation layer (2), the seal head (1) is prefabricated on the heat insulation layer (2) at one end of the explosive column (3), and the outer surface of the middle part of the core column (5) is attached to the inner profile of the explosive column (3).

3. The medicated winding combined core mold of claim 1, wherein: the axial sealing structure is an O-shaped ring (10).

4. The medicated winding combined core mold of claim 1, wherein: the winding tool connection interface reserved on the core column (5) of each section of the explosive column assembly is positioned at one end of the core column (5) and outside each section of the explosive column assembly.

5. The medicated winding combined core mold of claim 1, wherein: in each section of the explosive column assembly, after the core column (5) is fixed on the end socket (1) through the end socket nut (4), one end of the core column is positioned in the heat insulation layer (2), the propellant is poured into the core column and then is solidified to form the explosive column (3), and the surface of the explosive column (3) in contact with the core column (5) is an explosive shape surface and serves as a combustion surface.

6. The medicated winding combined core mold of claim 1, wherein: the core column (5) is provided with a flanging (51) for axial restraint, and the flanging is used for limiting when one end of the core column (5) is inserted into the heat insulation layer (2); and the core column (5) is also provided with a winding tool connecting interface (52) for connecting with an external winding tool.

7. The medicated winding combined core mold of claim 1, wherein: furthermore, the contact surface of the core column (5) and the powder column (3) is a conical surface which is used as a demoulding conical surface, so that the core column (5) can be detached after an external winding tool forms a shell outside the combined core mould (comprising an end socket (1), a heat insulation layer (2) and an outer coating layer (8)) for winding the powder.

8. The medicated winding combined core mold of claim 1, wherein: the combined core mould with the medicine winding is formed by propellant.

9. The medicated winding combined core mold of claim 1, wherein: a heat insulating layer (2) is installed by adopting a mould, and the explosive column (3) is cast and molded in the heat insulating layer (2).

10. The medicated winding combined core mold of claim 1, wherein: the two sections of the drug column assemblies are oppositely bonded.

11. The medicated winding combined core mold of claim 1, wherein: the end socket (1) is pre-embedded in the molding stage of the heat insulation layer (2).

12. The medicated winding combined core mold of claim 1, wherein: the core column (5) realizes the drug shape and simultaneously serves as a winding mandrel.

13. The medicated winding combined core mold of claim 1, wherein: the core column (5) has the connecting capacity of charging forming and winding tools.

14. The medicated winding combined core mold of claim 1, wherein: the combined core mold with the medicine winding adopts unilateral sealing, an axial sealing structure is arranged between the core column (5) and the end enclosure (1), one end of the medicine column assembly is sealed, the other end of the medicine column assembly is open, and a propellant can be poured.

15. The medicated winding combined core mold of claim 1, wherein: the grain (3) comprises: the device comprises a semi-ellipsoid body and a cylinder, wherein one side of the cylinder is connected with the semi-ellipsoid body, and the other side of the cylinder is a flat end surface; the middle of the grain (3) is provided with a hollow part; the outer edge of the flat end surface of the explosive column (3) is coated by the heat insulating layer (2), and the outer surface of the semi-ellipsoid of the explosive column (3) is completely coated by the inner side of the semi-ellipsoid of the heat insulating layer (2).

Technical Field

The invention relates to a combined core mold with a medicine winding function, and belongs to the technical field of composite material shells of solid rocket engines.

Background

The conventional fiber winding composite shell is formed by adopting an ablation core mold or a split core mold, the process comprises the steps of core mold forming, shell forming and charging, and the process is relatively complex. For tactical missile, the missile body has smaller missile diameter, the shell has larger front and rear openings due to the complex combustion surface form of the propellant, so that the charging process is realized, and the development of the fiber efficiency of the composite shell is greatly influenced due to the existence of the large opening.

Disclosure of Invention

The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the combined core mold with the winding agent is provided, the molding requirement of the composite shell with the winding agent is met, the molding process of the composite shell with the winding agent is simplified, and the problems that the conventional composite shell with the small and medium-sized spring diameters is few in application, the charging performance is difficult to release and the like are solved.

The technical scheme of the invention is as follows: a medicated winding combined core mold comprising: the explosive column assembly, a connecting rod (6), a butt joint nut (7), an outer coating layer (8), a butt joint plug (9) and an axial sealing structure;

the drug column assembly is two petals; the two sections of the explosive column assemblies are symmetrically arranged;

each petal of medicinal column assembly comprises: the device comprises a seal head (1), a heat insulation layer (2), a medicine column (3), a seal head nut (4) and a core column (5);

in each section of the explosive column assembly, a heat insulation layer (2) is arranged outside each section of the explosive column (3), an end enclosure (1) is prefabricated on the heat insulation layer (2), an end enclosure nut (4) is fixed on the end enclosure (1) and used for connecting the end enclosure (1) and a core column (5), and each section of the explosive column (3) and the corresponding end enclosure (1), the heat insulation layer (2), the end enclosure nut (4) and the core column (5) form each section of the explosive column (3) assembly;

in each medicinal column assembly, a core column (5) is fixed on an end socket (1) through an end socket nut (4); an axial sealing structure is arranged between the core column (5) and the end socket (1), and a winding tool connecting interface is reserved;

the two-petal explosive column assembly realizes axial restraint and fixation through the matching of a connecting rod (6), a butt joint nut (7) and a butt joint plug (9);

the outer coating layer (8) is coated on the outer side of the joint of the heat insulating layers (2) of the two-petal drug column assembly;

preferably, the explosive column (3) is arranged in the heat insulation layer (2), the sealing head (1) is prefabricated on the heat insulation layer (2) at one end of the explosive column (3), and the outer surface of the middle part of the core column (5) is attached to the inner profile of the explosive column (3).

Preferably, the axial sealing structure is provided as an O-ring (10).

Preferably, the winding tool connection interface reserved on the core column (5) of each section of the grain combination piece is positioned at one end of the core column (5) and outside each section of the grain combination piece.

Preferably, the heat insulating layer (2) is made of ethylene propylene diene monomer and is coated on the inner side of the seal head (1).

Preferably, in each section of the explosive column assembly, after the core column (5) is fixed on the end socket (1) through the end socket nut (4), one end of the core column is positioned in the heat insulation layer (2), the propellant is poured into the core column and then is solidified to form the explosive column (3), and the surface of the explosive column (3) in contact with the core column (5) is a explosive shape surface and serves as a combustion surface.

Preferably, the core column (5) is provided with a flanging (51) for axial restraint, and the flanging is used for limiting when one end of the core column (5) is inserted into the heat insulation layer (2); and the core column (5) is also provided with a winding tool connecting interface (52) for connecting with an external winding tool.

Preferably, the contact surface of the core column (5) and the powder column (3) is a conical surface which is used as a demoulding conical surface, so that the core column (5) can be conveniently detached after an external winding tool winds the combined core mould (comprising a sealing head (1), a heat insulation layer (2) and an outer coating layer (8)) to form a shell outside the combined core mould for the powder winding.

Preferably, the combined core mould with the medicine winding is formed by using a propellant;

preferably, a heat insulating layer (2) is arranged by a mould, and the grain (3) is cast and molded in the heat insulating layer (2)

Preferably, the two-petal medicinal column assembly is bonded oppositely.

Preferably, the end socket (1) is pre-embedded in the molding stage of the heat insulation layer (2).

Preferably, the core column (5) realizes the drug shape and simultaneously serves as a winding mandrel.

Preferably, the core column (5) has the connecting capacity of charging forming and winding tools at the same time.

Preferably, the combined core mold with the medicine winding adopts unilateral sealing, an axial sealing structure is arranged between the core column (5) and the end enclosure (1), one end of the medicine column assembly is sealed, the other end of the medicine column assembly is open, and a propellant can be poured.

Preferably, the cartridge (3) comprises: the device comprises a semi-ellipsoid body and a cylinder, wherein one side of the cylinder is connected with the semi-ellipsoid body, and the other side of the cylinder is a flat end surface; the middle of the grain (3) is provided with a hollow part; the outer edge of the flat end surface of the explosive column (3) is coated by the heat insulating layer (2), and the outer surface of the semi-ellipsoid of the explosive column (3) is completely coated by the inner side of the semi-ellipsoid of the heat insulating layer (2).

Preferably, the heat insulating layer (2) comprises: one side of the cylindrical surface is connected with the semi-ellipsoid, the other side of the cylindrical surface is used as a flat end surface, the flat end surface and the end surface of the explosive column (3) are jointly used as a butt joint surface of two explosive column assemblies, namely a surface A, and the outer cylindrical surface of the heat insulation layer (2) close to the flat end surface is used as a surface B.

The top of the semi-ellipsoid surface of the heat insulation layer (2) is opened to be used as a butt joint port and can penetrate through the core column (5); the part of the heat insulation layer positioned on the semi-ellipsoid surface extends to the flat end surface of the explosive column (3); a pouring port for pouring propellant is arranged on the flat end surface of the heat insulation layer (2);

preferably, after the two-petal medicinal column assembly is butted, the outer side of the butted position is coated by a heat insulation layer (8).

Preferably, the surface A and the surface B of the butt joint surface of the two-petal grain assembly are coated with adhesives, so that the integral sealing of the winding combined core mould with the medicine is ensured.

Preferably, the core column (5) is made of high-strength aluminum alloy materials, so that the integral rigidity and strength of the combined core mold wound with the chemical are guaranteed.

Preferably, polytetrafluoroethylene release agent is sprayed on the surface of the core column (5) for separating the core column (5) and the explosive column (3).

Preferably, the winding tool connecting interface (52) is an external thread and is used for connecting the combined core mold with the winding tool for winding the medicine, and the winding tool can be connected with the winding device.

Preferably, the heat insulating layer (2) is made of ethylene propylene diene monomer rubber, the ethylene propylene diene monomer rubber and the seal head (1) are solidified and formed through a mold, and the thickness of the ethylene propylene diene monomer rubber is 3-5 mm.

Preferably, the propellant (3) is a high-elasticity-modulus propellant and is cast in the inner cavity of the heat-insulating layer (2), and the shape surface of the grain (3) is ensured by the core column (5).

Preferably, the two-petal grain combination piece is butted through a connecting rod (6), a butting nut (7) and a butting plug (9).

Preferably, the end socket (1) is made of a light high-strength titanium alloy material, and other metal parts including the end socket nut (4), the connecting rod (6), the butt joint nut (7) and the butt joint plug (9) are made of a high-strength stainless steel material. (light weight, high strength, concrete amount) (set parameters)

Preferably, the one end of connecting rod (6) is equipped with the hexagon head for the spacing fixed of axial, and can cooperate the instrument to install, and the other end of connecting rod (6) is equipped with the external screw thread, can compress tightly stem (5) in the two lamella explosive column sub-assemblies with butt joint nut (7) screw-thread fit.

Preferably, the stem (5) in each petal of the grain combination comprises: the device comprises a tool connecting section, a fixing section, a sealing section and a medicine surface forming section; the tool connecting section, the fixing section, the sealing section and the medicine surface forming section are sequentially connected; the tool connecting section, the fixing section and the sealing section are all positioned outside the semi-ellipsoid surface of the heat insulating layer (2); the powder surface forming section is positioned inside the semi-ellipsoid surface of the heat insulating layer (2)

The one end of fixed section is kept away from to the frock linkage segment, is equipped with the external screw thread for be connected with outside winding frock.

One end of the fixed section, which is close to the sealing section, is provided with a flanging (51), and the flanging is an annular boss which is convex along the axial direction; the outer surface of the fixing section can be matched with the inner profile of the seal head nut (4).

An annular sealing groove is formed in the outer surface of the sealing section, and an O-shaped ring (10) is arranged in the annular sealing groove and used for sealing the core column (5) and the seal head (1).

And the powder surface forming section is used for forming the poured propellant into the powder column (3).

An annular limiting groove is formed in the inner side of the end face of one end, away from the sealing section, of the medicine surface forming section and is used for being matched with the butt joint plug (9).

Preferably, the butt joint plug (9) is in a hollow column shape, and the butt joint plug (9) is sleeved on the connecting rod (6) and arranged between the connecting rod (6) and the sealing core column (5);

the outer side of the middle part of the column is provided with a limit boss protruding along the circumferential direction, and the limit boss is matched with an annular limit groove of the powder surface forming section, so that the butt joint and the axial limit of the two-petal powder column assembly are realized.

Preferably, the end socket (1) is connected with the end socket nut (4) in a threaded fit manner.

Compared with the prior art, the invention has the advantages that:

(1) the invention replaces the ablation core mould or the split core mould with the medicine column core mould, greatly simplifies the forming process of the engine, shortens the development period of the engine and reduces the development cost of the engine.

(2) The invention breaks through the limit of propellant charging by the core mould forming mode of firstly splitting and then combining, and can realize diversified chemical charging structures.

(3) The invention simplifies the integral structure of the winding core mould with the medicine, improves the integral bearing capacity of the combined core mould with the medicine and realizes the winding and forming of the composite material shell with the medicine.

Drawings

FIG. 1 is a schematic view of a combined core mold structure with a drug winding device;

FIG. 2 is a schematic structural view of a cartridge assembly;

FIG. 3 is an enlarged view of the combined core mold structure with medicine winding of FIG. 1 at the location I;

FIG. 4 is an enlarged view of the medicated winding modular core mold structure of FIG. 1 at location II;

wherein, 1-end socket, 2-heat insulation layer, 3-explosive column, 4-end socket nut, 5-core column, 6-connecting rod, 7-butt nut, 8-outer cladding layer, 9-butt plug and 10-O-shaped ring.

Detailed Description

The invention is described in further detail below with reference to the figures and specific embodiments.

According to the combined core mold with the wound medicine, the medicine core mold is integrated with the propellant and the heat-insulating layer, the forming requirement of the compound shell wound with the medicine is met, the heat-insulating layer and the propellant molded surface are formed through the medicine filling process, the core column is used as the winding shaft, the strength and the rigidity of the combined core mold wound with the medicine are enhanced, the medicine filling and winding requirements are met, and the problems that the combined core mold wound with the medicine is too complex in structure, complicated in forming process and the like are solved.

The light weight and high energy are the development trend of a new generation of solid rocket engine, the composite shell is formed by adopting a non-metal material, the passive quality of the engine can be effectively reduced by applying a high-strength ratio fiber material, and the overall performance of the engine is improved.

The winding composite shell with the powder is used as one of the forming modes of the composite shell, and has the advantages of small and light metal structural parts, diversified charging modes, light overall structure, simple process forming and the like.

The combined core mold with the winding of the chemicals is used as a key structure for forming the compound shell with the winding of the chemicals, so that the forming of the compound shell with the winding of the chemicals is realized, the problems of limited charging form, complex process and the like of the traditional compound shell are solved, the development period of an engine is shortened, and the development cost is reduced.

The combined core mould with the medicine winding directly replaces a traditional core mould, the fiber is directly wound on the outer side of the combined core mould with the medicine by winding equipment, the fiber is wound on the composite shell for forming, namely forming of an engine combustion chamber, the fiber layer is attached to the heat insulating layer on the outer side of the combined core mould with the medicine winding, and the fiber layer is reinforced by the interface adhesive to prevent debonding.

As shown in fig. 1, a medicated winding combined core mold according to the present invention preferably includes: the explosive column assembly, a connecting rod (6), a butt joint nut (7), an outer coating layer (8), a butt joint plug (9) and an axial sealing structure;

as shown in fig. 2, the cartridge assembly is two-piece; the two sections of the explosive column assemblies are symmetrically arranged;

each petal of medicinal column assembly comprises: the engine comprises a seal head (1), a heat insulation layer (2), a explosive column (3), a seal head nut (4) and a core column (5), wherein the seal head (1) is an engine structural member and is used for connecting an internal structure of the engine, the heat insulation layer (2) is used for protecting and sealing the engine, and the explosive column (3) is an engine propellant and is used for realizing the thrust generated by the engine;

in each section of the explosive column assembly, a heat insulation layer (2) is arranged outside each section of the explosive column (3), an end enclosure (1) is prefabricated on the heat insulation layer (2), an end enclosure nut (4) is fixed on the end enclosure (1) and used for connecting the end enclosure (1) and a core column (5), and each section of the explosive column (3) and the corresponding end enclosure (1), the heat insulation layer (2), the end enclosure nut (4) and the core column (5) form each section of the explosive column (3) assembly;

in each medicinal column assembly, a core column (5) is fixed on an end socket (1) through an end socket nut (4); an axial sealing structure is arranged between the core column (5) and the end socket (1), and a winding tool connecting interface is reserved, so that the composite material shell can be wound and molded conveniently;

the two-petal explosive column assembly realizes axial restraint and fixation through the matching of a connecting rod (6), a butt joint nut (7) and a butt joint plug (9);

the outer coating layer (8) is coated on the outer side of the joint of the heat insulating layers (2) of the two-petal drug column assembly;

the preferred scheme is as follows: the explosive column (3) is arranged in the heat insulation layer (2), the seal head (1) is prefabricated on the heat insulation layer (2) at one end of the explosive column (3), and the outer surface of the middle part of the core column (5) is attached to the inner profile of the explosive column (3).

The preferred scheme is as follows: the axial sealing structure is an O-shaped ring (10).

The preferred scheme is as follows: the winding tool connection interface reserved on the core column (5) of each section of the explosive column assembly is positioned at one end of the core column (5) and outside each section of the explosive column assembly.

The preferred scheme is as follows: the heat insulation layer (2) is made of ethylene propylene diene monomer rubber, is coated on the inner side of the seal head (1), and is formed through a die, so that the engine combustion chamber shell pasting tool is reduced.

The preferred scheme is as follows: as shown in fig. 3, in each petal of the grain assembly, after the core column (5) is fixed on the end socket (1) through the end socket nut (4), one end is positioned in the heat insulation layer (2), the propellant is poured and then cured to form the grain (3), the contact surface of the grain (3) and the core column (5) is a grain surface which is used as a combustion surface, and the combustion surface is formed after the core column (5) is demoulded.

The preferred scheme is as follows: the core column (5) is provided with a flanging (51) for axial restraint, and the flanging is used for limiting when one end of the core column (5) is inserted into the heat insulation layer (2); and a winding tool connecting interface (52) is further arranged on the core column (5) and is used for being connected with an external winding tool, so that the use of the winding combined core mold with the medicine is simplified.

The preferred scheme is as follows: furthermore, the contact surface of the core column (5) and the grain (3) is a conical surface which is used as a demoulding conical surface, so that the core column (5) can be conveniently detached after an external winding tool forms a shell outside the combined core mould (1, 2, 8) for winding the grain.

The preferred scheme is as follows: the combined core mold wound with the medicament is formed by using a propellant, so that the preparation and disassembly processes of an ablation core mold or a combined core mold are avoided;

the preferred scheme is as follows: a heat insulating layer (2) is arranged by adopting a mould, and a grain (3) is cast and molded in the heat insulating layer (2)

The preferred scheme is as follows: the two sections of the drug column assemblies are oppositely bonded.

The preferred scheme is as follows: the end socket (1) is pre-embedded in the molding stage of the heat insulation layer (2) without being separately bonded.

The preferred scheme is as follows: the core column (5) realizes the drug shape and simultaneously serves as a winding mandrel.

The preferred scheme is as follows: the core column (5) has the connecting capacity of charging forming and winding tools.

The preferred scheme is as follows: the combined core mold with the medicine winding adopts unilateral sealing, an axial sealing structure is arranged between the core column (5) and the end enclosure (1), one end of the medicine column assembly is sealed, the other end of the medicine column assembly is open, and a propellant can be poured.

The preferred scheme is as follows: the grain (3) comprises: the device comprises a semi-ellipsoid body and a cylinder, wherein one side of the cylinder is connected with the semi-ellipsoid body, and the other side of the cylinder is a flat end surface; the middle of the grain (3) is provided with a hollow part; the outer edge of the flat end surface of the explosive column (3) is coated by the heat insulating layer (2), and the outer surface of the semi-ellipsoid of the explosive column (3) is completely coated by the inner side of the semi-ellipsoid of the heat insulating layer (2).

The preferred scheme is as follows: the heat insulating layer (2) comprises: one side of the cylindrical surface is connected with the semi-ellipsoid, the other side of the cylindrical surface is used as a flat end surface, the flat end surface and the end surface of the explosive column (3) are jointly used as a butt joint surface of two explosive column assemblies, namely a surface A, and the outer cylindrical surface of the heat insulation layer (2) close to the flat end surface is used as a surface B.

The top of the semi-ellipsoid surface of the heat insulation layer (2) is opened to be used as a butt joint port and can penetrate through the core column (5); the part of the heat insulation layer positioned on the semi-ellipsoid surface extends to the flat end surface of the explosive column (3); a pouring port for pouring propellant is arranged on the flat end surface of the heat insulation layer (2);

the preferred scheme is as follows: after the two sections of the grain assemblies are butted, the outer side of the butted position is coated by a heat insulation layer (8), as shown in figure 4.

The preferred scheme is as follows: the surface A and the surface B of the butt joint surface of the two-petal grain assembly are coated with the adhesive, the integral sealing of the winding combined core mould with the grain is ensured, and after the bonding is finished, the winding combined core mould with the grain is cured and formed at a medium and low temperature (the curing temperature is preferably less than or equal to 70 ℃), so that the aging process of the heat insulation layer (2) and the grain (3) is avoided, and the propellant burning risk caused by a higher temperature is also avoided.

The preferred scheme is as follows: the core column (5) is made of high-strength aluminum alloy materials, and the integral rigidity and strength of the combined core mould wound with the chemical are guaranteed.

The preferred scheme is as follows: the surface of the core column (5) is sprayed with polytetrafluoroethylene release agent for separating the core column (5) and the explosive column (3).

The preferred scheme is as follows: the winding tool connecting interface (52) is an external thread and is used for connecting the combined core mold with the winding tool with the chemicals, and the winding tool can be connected with the winding device.

The preferred scheme is as follows: the heat insulating layer (2) is made of ethylene propylene diene monomer rubber, and is solidified and formed with the seal head (1) through a mould, the thickness of the ethylene propylene diene monomer rubber is 3-5 mm, or is properly adjusted according to the combustion condition of the explosive column (3).

The preferred scheme is as follows: the thermal insulation type powder propellant is characterized in that the propellant (3) is a high-elasticity-modulus propellant and is poured into the inner cavity of the thermal insulation layer (2), the surface of the powder column (3) is ensured by the core column (5), and the risks of collapse and the like of the powder column (3) caused by fiber tension are reduced by the high-elasticity-modulus propellant.

The preferred scheme is as follows: the two sections of explosive column assemblies are butted through the connecting rod (6), the butt joint nut (7) and the butt joint plug (9), so that the two sections of explosive column assemblies are fastened and sealed, and the process and the bonding process are synchronously carried out.

The preferred scheme is as follows: the end socket (1) is made of a light high-strength titanium alloy material, and other metal parts including the end socket nut (4), the connecting rod (6), the butt joint nut (7) and the butt joint plug (9) are made of high-strength stainless steel materials, so that the metal strength is greater than 800MPa, the passive quality is further reduced when the shell structure is designed, and the overall performance of the structure is improved.

The preferred scheme is as follows: the one end of connecting rod (6) is equipped with the hexagon head for axial spacing fixed, and can cooperate the instrument to install, the other end of connecting rod (6) is equipped with the external screw thread, can compress tightly stem (5) in the two lamella explosive column sub-assemblies with butt nut (7) screw-thread fit.

The preferred scheme is as follows: a stem (5) in each petal of the charge combination, comprising: the device comprises a tool connecting section, a fixing section, a sealing section and a medicine surface forming section; the tool connecting section, the fixing section, the sealing section and the medicine surface forming section are sequentially connected; the tool connecting section, the fixing section and the sealing section are all positioned outside the semi-ellipsoid surface of the heat insulating layer (2); the powder surface forming section is positioned inside the semi-ellipsoid surface of the heat insulating layer (2)

The one end of fixed section is kept away from to the frock linkage segment, is equipped with the external screw thread for be connected with outside winding frock.

One end of the fixed section, which is close to the sealing section, is provided with a flanging (51), and the flanging is an annular boss which is convex along the axial direction; the outer surface of the fixing section can be matched with the inner profile of the seal head nut (4).

Be equipped with annular seal groove on the surface of seal section, set up O shape circle (10) in the annular seal groove for sealed stem (5) and head (1), the unilateral that prevents the powder charge in-process leaks.

And the powder surface forming section is used for forming the poured propellant into the powder column (3).

An annular limiting groove is formed in the inner side of the end face of one end, away from the sealing section, of the medicine surface forming section and is used for being matched with the butt joint plug (9).

The preferred scheme is as follows: the butt joint plug (9) is in a hollow column shape, and the butt joint plug (9) is sleeved on the connecting rod (6) and arranged between the connecting rod (6) and the sealing core column (5);

the protruding spacing boss of edge circumference is provided with in the column middle part outside, and the annular spacing groove cooperation of face shaping section realizes the butt joint and the axial spacing of two lamella medicinal column sub-assemblies, avoids the too big face extrusion deformation that leads to of atress when guaranteeing the laminating of medicinal column sub-assembly.

The preferred scheme is as follows: the seal head (1) is connected with the seal head nut (4) in a thread fit manner.

The end socket (1) and the heat insulating layer (2) are molded through a mold, the end socket nut (4) is used for fixing the core column (5), propellant pouring is carried out after the tape fixing is finished, a medicine column assembly is formed, the medicine column assembly is fixed through the connecting rod (6), the butt joint nut (7) and the butt joint plug (9), an outer coating layer (8) is coated, and the combined core mold with the medicine winding is formed after curing.

The end socket is made of titanium alloy, the strength is greater than or equal to 800MPa, the outer surface is an ellipsoid, the pressure-bearing characteristic and the structural connection strength of a combustion chamber are ensured, and the negative quality of a shell is reduced; the core column is made of high-strength aluminum alloy, the strength is more than or equal to 450MPa, and the integral structural strength of the combined core mold with the medicine and wound in the charging process and the winding process is ensured while the core mold is lightened; the nut, the connecting rod, the butt joint nut and the butt joint plug are all made of high-strength stainless steel materials, the strength is greater than or equal to 1000MPa, the rusting can be avoided while the structural connection strength is guaranteed, the nut, the butt joint nut and the butt joint plug can be repeatedly used, and the cost is reduced.

The heat insulating layer and the outer cladding layer are made of ethylene propylene diene monomer rubber, so that the heat insulating layer and the outer cladding layer have good vulcanization process and good structural adaptability, can completely attach the end socket profile and the combustion chamber profile, and simultaneously have good heat insulating, ablation resistance and sealing effects.

The propellant used in the invention is a high-elasticity modulus propellant, the modulus of the propellant is preferably more than or equal to 10MPa, so that the integral combined core mould with the wound core mould with the propellant has better rigidity, and in addition, the propellant columns adopt a butt-flap type structure, so that the space of a combustion chamber is fully utilized, and the filling ratio of an engine is greatly increased.

The preferred scheme is as follows: the combined core mold with the medicine winding comprises an engine propellant, is used for replacing the traditional ablation type or split type core mold, adopts the core column to realize the forming and winding bearing of the medicine surface, simplifies the forming process of the composite shell, and realizes the winding forming of the composite shell with the medicine.

The preferred scheme is as follows: the outer diameter of the cylinder section is preferably phi 150mm, the diameter of the end socket winding polar hole is preferably phi 59.6mm, the total length of the core mold is preferably 457mm, and the total length of the winding area is preferably 311mm, so that the performance of the core mold is further improved.

The preferred scheme is as follows: the front end enclosure and the rear end enclosure are of semi-ellipsoidal structures, the ratio of the ellipsoids to the ellipsoids is 2, and the end enclosures are preferably connected with end enclosure nuts by adopting M40 multiplied by 2 threads.

The preferred scheme is as follows: the thickness of the whole heat insulation layer is preferably 3mm, and the thickness of the heat insulation layer of the outer cladding layer at the butt joint is preferably 1 mm.

The preferred scheme is as follows: the nominal value of the outer diameter of the stem section is preferably phi 32mm, the contact profile of the stem section and the drug surface is sprayed with polytetrafluoroethylene release agent, and the threaded interfaces at two ends of the stem are preferably M27 multiplied by 2 and connected with a winding tool.

The preferred scheme is as follows: the heat insulation layer is made of ablation-resistant ethylene propylene diene monomer rubber, the end socket is made of TC4 titanium alloy, the end socket nut, the connecting rod, the butt nut and the butt plug are preferably made of 05Cr17Ni4Cu4Nb stainless steel materials, the core column is made of 2A12 aluminum alloy, and the propellant is a butyl hydroxyl propellant.

The preferred scheme is as follows: the used explosive column assembly is formed by casting an end socket, a heat insulation layer, an explosive column, a core rod and an end socket nut in advance through a mould.

The preferred scheme is as follows: the combined core mould with the medicine winding is formed by butt-jointing and bonding two sections of medicine column assemblies, the outer side of the core mould is coated with a heat insulation layer, and the medicine surface is shaped before the medicine column assemblies are in butt-jointing and bonding, so that the fitting degree of the butt-jointed surfaces is ensured.

The preferred scheme is as follows: when the grain combination piece is bonded, the medium-low temperature curing adhesive is adopted, the curing system is preferably 70 ℃/12h, and the thickness of the adhesive is preferably controlled to be not more than 0.3 mm.

The preferred scheme is as follows: and a fiber layer is wound on the outer side of the combined core mold with the winding agent and is used for forming a composite material shell, an interface adhesive is smeared between the fiber layer and the combined core mold with the winding agent, and the interface adhesive strength is preferably not less than 1.5 MPa.

The preferred scheme is as follows: and after the preparation of the chemical-carrying winding combined type core mold fiber shell is finished, disassembling the core rod, the connecting rod, the butt plug, the seal head nut and the butt nut to obtain the final chemical-carrying winding composite shell.

The preferred scheme is as follows: the combined core mold with the winding agent is manufactured in a trial mode, the manufacturability and the producibility of the product are verified, and the composite shell is manufactured in a trial mode at the same time, so that the manufacturing requirement of the composite shell with the winding agent is met.

The invention further discloses a scheme for improving the bearing capacity of a combined core mould with a winding agent, which comprises the following steps: let the allowable strength of the core column be sigma₁The minimum outer diameter of the core column is d₁Mass of the core column is m₁The other mass of the combined core mould with the medicine is m₂When σ is satisfied₁*π*d₁ ²/4≥(m₁+m₂) g, m after given engine dimensions₁And m₂The limit conditions of the core column loading in the limited combustion chamber design space can be obtained as a function of the structure size, so that the structure form of the combined core mould with the powder winding is further optimized, and the bearing capacity is improved.

The further proposal for improving the rigidity of the combined core mould with the medicine winding is as follows: the modulus of the grain is E, and the inner and outer diameters of the grain are d₁And d₂The fiber tension is F, the strain of the explosive column is epsilon, and the epsilon is more than or equal to 4 kEF/(pi d)₁ ²-πd₂ ²) The rigidity of the combined core mold with the medicine winding can be improved, wherein the limit of epsilon is 5% -10%, k is a correction coefficient according to actual medicine charging measurement, and the value is 1-2.

According to the invention, through trial production of the combined core mold with the winding agent, the integral forming time of the combustion chamber is shortened by 1/3, the hydraulic strength of the compound shell with the winding agent prepared by the combined core mold with the winding agent is not less than 20MPa, and the corresponding PV/W coefficient is more than 45, so that the product development period is greatly shortened, and meanwhile, the compound shell with higher performance is obtained.