CN115539252A - Conical primer arrow storage box structure - Google Patents
Conical primer arrow storage box structure Download PDFInfo
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- CN115539252A CN115539252A CN202211492070.4A CN202211492070A CN115539252A CN 115539252 A CN115539252 A CN 115539252A CN 202211492070 A CN202211492070 A CN 202211492070A CN 115539252 A CN115539252 A CN 115539252A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
- F02K9/605—Reservoirs
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Abstract
The invention provides a conical-bottom rocket storage box structure, which belongs to the technical field of rockets and is a conical-bottom-shared rocket storage box with a simplified structure, wherein the conical-bottom-shared rocket storage box comprises a storage box front conical bottom at the upper end and a storage box rear conical bottom at the lower end, a front box shell is connected below the storage box front conical bottom, and a rear box shell is connected above the storage box rear conical bottom; the front box shell and the rear box shell are connected through a common bottom r-shaped ring; the inner side of the common-bottom r-shaped ring is connected with a conical common bottom, the conical common bottom is in a conical shape protruding upwards or downwards, and a common-bottom heat insulation layer is arranged on the lower surface of the conical common bottom in a fitting manner. The invention adopts the design of a single-layer conical common-bottom storage tank, and a conical common-bottom lower single-surface common-bottom heat insulation layer is arranged; adopt the trinity structure of r type ring, compare current storage tank structure and saved changeover portion and end frame structure, structural design retrencies the optimization, has saved product supporting cost, has reduced rocket draw ratio, helps the optimal design of totality and structure.
Description
Technical Field
The invention belongs to the technical field of rockets, and particularly relates to a storage box structure of a conical primer rocket.
Background
At present, the world space industry has entered into the commercialization age, the core feature is low cost rocket launching and satellite operation services, and the American SpaceX company is used as a lead of the global commercial space, and the launching cost of the falcon rocket developed by the SpaceX company is almost reduced by one order of magnitude. Cost reduction and efficiency improvement are inevitable choices for the development of a carrier rocket.
The carrier rocket mainly comprises a structure, power, an electric control system and the like, and the rocket structure is an important component of the carrier rocket. A general liquid rocket structure is shown in fig. 4a to 4c, and mainly includes a first-stage rocket body structure, a second-stage rocket body structure, a fairing, and the like. The first-stage rocket body structure mainly comprises a first-stage power cabin, a first-stage rear box, a first-stage box interval section, a first-stage front box, an inter-stage section and the like.
In order to reduce the length of the rocket, the rocket can adopt a common-bottom storage tank design scheme, a certain type of domestic rocket adopts liquid hydrogen and liquid oxygen propellants in three stages, the common bottom of the storage tank needs to be insulated due to different liquid temperatures of the liquid hydrogen and the liquid oxygen propellants, a double-layer common-bottom vacuum structure is adopted, namely, a front tank rear bottom convex bottom is changed into a rear concave bottom structure; the rear concave bottom of the front box and the front convex bottom of the rear box are oppositely attached, a gap cavity is reserved between the rear concave bottom of the front box and the front convex bottom of the rear box, the rear concave bottom of the front box and the front convex bottom of the rear box are mechanically connected and vacuumized to form a vacuum cavity, and the heat insulation effect is improved. The scheme still has the defect of more complicated process.
On the other hand, the first-stage rocket body storage box is provided with a plurality of sections of structures such as Y-shaped rings, transition sections and end frames for connection, so that the parts are multiple, the process is complex, and the further reduction of the cost of the rocket is limited.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a conical bottom rocket storage box structure, which reduces the number of rocket storage box parts and the process difficulty and further reduces the rocket cost by simplifying the connecting structure of the storage box, particularly the connecting structure of a rear box and an engine part.
According to the technical scheme, the invention provides a conical-bottom rocket storage box structure, which is a conical-bottom-shared rocket storage box with a simplified structure, wherein the conical-bottom-shared rocket storage box comprises a storage box front conical bottom at the upper end and a storage box rear conical bottom at the lower end, a front box shell is connected below the storage box front conical bottom, and a rear box shell is connected above the storage box rear conical bottom; the front box shell and the rear box shell are connected through a common bottom r-shaped ring; the inner side of the common-bottom r-shaped ring is connected with a conical common bottom which is in a conical shape protruding upwards or downwards, and a common-bottom heat insulation layer is arranged on the lower surface of the conical common bottom in a fitting mode.
Furthermore, the conical common bottom is in a conical shape protruding upwards, and the lower end of the conical common bottom is butted with the upper end of the inner side of the r-shaped ring with the common bottom; the common-bottom thermal insulation layer is attached to the conical common-bottom lower surface and extends to the lower end of the common-bottom r-shaped ring in an attaching mode.
Further, the co-bottom heat insulation layer is a plate-shaped structure made of PMI foam material, aerogel, basalt or ceramic fiber composite material with low temperature resistance.
Furthermore, the front cone bottom of the storage box and the rear cone bottom of the storage box are respectively in a cone shape protruding upwards and downwards.
Furthermore, the front conical bottom of the storage box is connected with the front box shell through a front r-shaped ring, and the upper end of the front r-shaped ring is connected with the stage section; the rear conical bottom of the storage box is connected with the rear box shell through a rear r-shaped ring, and the lower end of the rear r-shaped ring is connected with the power cabin.
Further, the front r-shaped ring and the rear r-shaped ring are connected with the adjacent stage section or the power cabin through respective first butt-joint ends; the first butt joint end is provided with a first connecting hole, the stage section and the power cabin are respectively provided with a second connecting hole, and the first connecting hole and the second connecting hole are aligned and are provided with bolts or rivets in a penetrating mode.
Furthermore, the front r-shaped ring and the rear r-shaped ring are respectively provided with a groove from the outer side to the inner side or from the inner side to the outer side.
Furthermore, the front r-shaped ring and the rear r-shaped ring are connected with the adjacent front box shell or rear box shell through respective second butt joint ends; the front r-shaped ring and the rear r-shaped ring are connected with the front conical bottom of the adjacent storage tank or the rear conical bottom of the adjacent storage tank through respective third butt ends.
Furthermore, the second butt joint end and the third butt joint end are both provided with ring grooves so as to be clamped with connected components and connected through a lock bottom welding line.
Furthermore, the second butt joint end and the third butt joint end are the same in thickness as the connected parts and are connected through butt weld joints.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the invention adopts the design of the single-layer conical common-bottom storage tank, namely, a tank bottom and a tank interval section are removed, and two storage tanks can be combined into one storage tank (one tank bottom is added), so that the structure is simplified, and the structure matching cost is reduced. The storage tank adopts a single-layer common-bottom structure, and a common-bottom heat insulation layer is arranged on one surface under the common bottom; compared with a vacuum double-layer common bottom, the single-layer common bottom has a simpler structure, improves the reliability, and further reduces the structure matching cost.
2. The invention adopts the r-shaped ring three-in-one structure, and compared with the existing storage tank structure, the invention removes the transition section and the end frame structural member, simplifies and optimizes the structural design, saves the matching cost of products, reduces the length-diameter ratio of the rocket, and is beneficial to the optimization design of the whole body and the structure.
Drawings
Fig. 1a is a schematic structural diagram of a conical common bottom according to an embodiment of the present invention.
Fig. 1b is a schematic view of a front r-shaped ring according to an embodiment of the present invention.
FIGS. 1c and 1d are schematic views of the structure of a rocket having the structure shown in FIGS. 1a and 1b, respectively, according to the present invention.
Fig. 2 and 3 are schematic structural diagrams of the front r-shaped ring according to other embodiments of the invention.
Fig. 4a and 4b are schematic structural views of conventional rockets, respectively.
Fig. 4c is a schematic cross-sectional view of the connection portion of the primary headbox and the secondary section of fig. 4 a.
Description of reference numerals in the drawings:
A. a first-level arrow structure; B. a second order arrow structure; C. a cowling; a1, a first-stage front box; a2, a first-stage rear box; a3, a first-level box interval section; a4, a stage section; a5, a power cabin; a11, a front box front end frame; a12, a front box front transition section; a13, the front bottom of the front box; a14, a front box front Y-shaped ring; a15, a front box shell; a16, a front box rear Y-shaped ring; a17, the rear bottom of the front box; a18, a front box rear transition section; a19, a front box rear end frame; a21, a front end frame of the rear box; a22, a rear box front transition section; a23, the front bottom of the rear box; a24, a Y-shaped ring in front of the rear box; a25, a rear box shell; a26, a Y-shaped ring behind the rear box; a27, the rear bottom of the rear box; a28, a rear box rear transition section; a29, a rear box rear end frame;
1. the front cone bottom of the storage box; 2. the rear cone bottom of the storage box; 3. a common-bottom r-shaped ring; 4. conical common bottom; 5. a common-bottom heat-insulating layer; 6. a front r-shaped ring; 7. a rear r-shaped ring; 8. a first butt end; 9. a first connection hole; 10. a second connection hole; 11. a groove; 12. a second butt joint end; 13. a third butt joint end; 14. and a ring groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings. The embodiments and features of the embodiments of the invention may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in the present invention are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that reference to "one or more" unless the context clearly dictates otherwise.
The invention relates to a conical-bottom rocket storage box structure, which belongs to the technical field of rockets, and the conical-bottom rocket storage box structure is a conical common-bottom rocket storage box with a simplified structure, wherein the conical common-bottom rocket storage box comprises a storage box front conical bottom at the upper end and a storage box rear conical bottom at the lower end, a front box shell is connected below the storage box front conical bottom, and a rear box shell is connected above the storage box rear conical bottom; the front box shell and the rear box shell are connected through a common bottom r-shaped ring; the inner side of the common-bottom r-shaped ring is connected with a conical common bottom, the conical common bottom is in a conical shape protruding upwards or downwards, and a common-bottom heat insulation layer is arranged on the lower surface of the conical common bottom in a fitting manner. The invention adopts the design of a single-layer conical common-bottom storage tank, and the conical common-bottom lower single-surface mounting common-bottom heat insulation layer simplifies the structure and reduces the structure matching cost; adopt trinity structure of r type ring, compare current storage tank structure and saved changeover portion and end frame structure, structural design retrencies the optimization, has saved product mating cost, has reduced the rocket draw ratio, helps the optimal design of whole and structure.
Referring first to fig. 4a to 4c, the structure of a conventional liquid rocket is shown. The outer side of the tank-shaped storage tank is provided with a storage tank shell, the two ends of the storage tank are provided with storage tank bottoms, the storage tank bottoms are exposed out of the storage tank shell, and the storage tank bottoms at the two ends of the storage tank are respectively provided with a multi-section connected annular connecting structure. Therefore, the storage tank comprises 12 connecting components, namely a front box front end frame A11, a front box front transition section A12, a front box front Y-shaped ring A14, a front box rear Y-shaped ring A16, a front box rear transition section A18, a front box rear end frame A19, a rear box front end frame A21, a rear box front transition section A22, a rear box front Y-shaped ring A24, a rear box rear Y-shaped ring A26, a rear box rear transition section A28 and a rear box rear end frame A29, in addition to the tank bottom and the shell. Further, the components need to be manufactured, assembled and connected separately, which results in complex process, high manufacturing difficulty, high cost, and large total weight, and thus hinders the development of a commercial launch vehicle that seeks to reduce cost.
Therefore, the invention provides a conical-type primer rocket storage box structure, which is mainly improved by canceling a transition section, an end frame and a Y-shaped ring split type structure of a storage box, and fusing and optimizing the structures and functions of the three structures and the functions to form a front r-shaped ring 6 and a rear r-shaped ring 7; in addition, all parts in the ranges of a front box rear bottom A17, a primary box section A3 and a rear box front bottom A23 are eliminated and replaced by the conical common bottom 4, and meanwhile, the common bottom heat insulation layer 5 is adopted to replace the existing double-layer common bottom vacuum structure; thereby significantly simplifying the structure and also reducing the weight.
Referring to fig. 1a to fig. 1d, in an embodiment of the present invention, the rocket body mainly includes a first-stage rocket body structure a, a second-stage rocket body structure B, a fairing C, and the like, wherein the first-stage rocket body structure a mainly includes a first-stage power cabin A5, a first-stage section A4, and a storage tank structure of the conical common-bottom rocket of the present invention. The invention relates to a conical common-bottom rocket storage tank, which comprises a storage tank front conical bottom 1 at the upper end and a storage tank rear conical bottom 2 at the lower end, wherein a front tank shell A15 is connected below the storage tank front conical bottom 1 through a front r-shaped ring 6, and a rear tank shell A25 is connected above the storage tank rear conical bottom 2 through a rear r-shaped ring 7.
As shown in fig. 1a, is a schematic cross-sectional view of portion E of fig. 1 c. The front box shell A15 and the rear box shell A25 are connected through a common-bottom r-shaped ring 3, the upper end of the inner side of the common-bottom r-shaped ring 3 is connected with a conical common-bottom 4, the conical common-bottom 4 is in an upward protruding cone shape, and a common-bottom heat insulation layer 5 is arranged on the lower surface of the conical common-bottom 4 in a fitting mode. The section of the common bottom r-shaped ring 3 is r-shaped, and the outer side surfaces of the front box shell A15, the rear box shell A25 and the common bottom r-shaped ring 3 are flush, so that the assembly is convenient and the aerodynamic resistance is reduced. The co-bottom heat insulation layer 5 is a plate-shaped structure made of heat insulation materials such as PMI foam materials, aerogel, basalt or ceramic fiber composite materials and the like with low temperature resistance. The bottom-sharing heat insulation layer 5 is attached to the lower surface of the conical bottom-sharing ring 4 and extends to the lower end of the bottom-sharing r-shaped ring 3 in an attaching mode, and therefore the heat insulation effect is guaranteed. The storage tank is hermetically separated by a conical common bottom 4, and a front conical bottom 1 of the storage tank and a rear conical bottom 2 of the storage tank are conical surfaces protruding upwards and downwards respectively. The conical bottom 4 is formed with a front box above for storing an oxidizing agent such as liquid oxygen and a rear box below for storing a combustion agent such as methane.
Please refer to fig. 1b, which is a schematic cross-sectional view of portion D in fig. 1 c. The front cone bottom 1 of the storage box is connected with the front box shell A15 through a front r-shaped ring 6, and the upper end of the front r-shaped ring 6 is connected with a stage section A4; the rear cone bottom 2 of the storage box is connected with the rear box shell A25 through a rear r-shaped ring 7, and the lower end of the rear r-shaped ring 7 is connected with the power cabin A5, so that a stable integrally fixed arrow body structure is formed.
The front r-shaped ring 6 and the rear r-shaped ring 7 are connected with the adjacent stage section A4 or the power cabin A5 through respective first butt-joint ends 8; first butt joint end 8 has seted up first connecting hole 9, has all seted up second connecting hole 10 on stage section A4 and the power compartment A5, and first connecting hole 9 and second connecting hole 10 align and penetrate and be provided with bolt or rivet.
Preferably, as shown in fig. 1b and fig. 2, the front r-shaped ring 6 and the rear r-shaped ring 7 are both provided with grooves 11 from the outer side to the inner side or from the inner side to the outer side, so as to reduce weight.
The front r-shaped ring 6 and the rear r-shaped ring 7 are connected with the adjacent front box shell A15 or rear box shell A25 through respective second butt joint ends 12; the front r-shaped ring 6 and the rear r-shaped ring 7 are connected with the adjacent front cone bottom 1 of the storage tank or the rear cone bottom 2 of the storage tank through respective third butt ends 13.
In the embodiment shown in fig. 1b, the second butt end 12 and the third butt end 13 are both butt welded to the same thickness of the connected components. Preferably, as shown in fig. 2, the second butt joint end 12 and the third butt joint end 13 are each provided with a ring groove 14 so as to be engaged with and welded to the connected components. The ring groove 14 is an inward recessed ring groove for accommodating the end of the connected plates, or it can be understood that an annular baffle is additionally arranged on the inner side based on the structure shown in fig. 1 b; in a word, the area of the front r-shaped ring 6 attached to the connecting part is increased through the structure, and the sealing of a welding line can be guaranteed through the welding of a lock bottom welding line.
In another embodiment as shown in fig. 3, the first abutting end 8 has a ring groove structure, and the end of the stage section A4 and the ring groove are correspondingly provided with through holes, such as two rows of holes distributed uniformly in the circumferential direction, and the through holes are fixed by rivets or bolts. The front r-shaped ring 6 is welded with the front cone bottom 1 of the storage tank and the front tank shell A15 through butt welding seams.
It can be understood that the connection mode of the three ends of the r-shape of the front r-shaped ring 6 and the rear r-shaped ring 7 and whether the grooves are formed can be selected and combined according to the requirement. The r-shaped ring can be connected with the storage tank shell and the storage tank bottom through bolts or rivets, and can be welded with the stage section A4/the power cabin A5, and in consideration of the assembly convenience and the subsequent use of the whole structure, the r-shaped ring is preferably directly welded and fixed with the storage tank shell and the storage tank bottom to form a structure connected with the storage tank main body, and is detachably connected with the stage section A4/the power cabin A5 through bolts, so that the maintenance and other work are facilitated. Further, the above is given only as an example for the one-stage arrow body structure, and it is conceivable that the present invention can be applied also to the two-stage arrow body structure and the like.
In addition, in terms of materials, a project adopts 2195 aluminum alloy materials with higher strength, a storage tank adopting composite materials or composite structures, and a storage tank structure adopting stainless steel materials for ultra-large rockets. The common-bottom storage box provided by the invention preferably adopts 2A14 aluminum alloy materials with better comprehensive performance and better cost performance. As a storage tank of a liquid oxygen and methane rocket, the low-temperature strength of the 2A14 aluminum alloy is close to 500MPa, and the low-temperature characteristic is better; and the relatively low density helps to reduce rocket weight; in addition, the 2A14 aluminum alloy is relatively low in cost and is a preferable material. And a solid-phase welding process of friction stir welding is adopted, so that the strength coefficient of a welding seam can be effectively improved, and quality defects such as welding pores, impurities, cracks and the like are reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The conical-bottom rocket storage tank structure is characterized in that the conical-bottom rocket storage tank structure is a conical common-bottom rocket storage tank with a simplified structure, the conical common-bottom rocket storage tank comprises a storage tank front conical bottom (1) at the upper end and a storage tank rear conical bottom (2) at the lower end, a front tank shell (A15) is connected below the storage tank front conical bottom (1), and a rear tank shell (A25) is connected above the storage tank rear conical bottom (2); the front box shell (A15) is connected with the rear box shell (A25) through a common bottom r-shaped ring (3); the inner side of the common-bottom r-shaped ring (3) is connected with a conical common bottom (4), the conical common bottom (4) is in a conical shape protruding upwards or downwards, and a common-bottom heat insulation layer (5) is arranged on the lower surface of the conical common bottom (4) in a fitting mode.
2. The cone-type bottom fire arrow storage box structure according to claim 1, characterized in that the cone-type common bottom (4) is in a cone shape protruding upwards, and the lower end of the cone-type common bottom (4) is butted with the upper end of the inner side of the common bottom r-shaped ring (3); the common-bottom heat insulation layer (5) is attached to the lower surface of the conical common bottom (4) and extends to the lower end of the common-bottom r-shaped ring (3) in an attaching mode.
3. The cone-type bottom fire arrow storage box structure according to claim 1, characterized in that the common bottom heat insulation layer (5) is a plate-shaped structure made of PMI foam material, aerogel, basalt or ceramic fiber composite material with low temperature resistance.
4. The storage box structure for the cone-type bottom rocket according to claim 2, wherein the front cone bottom (1) and the rear cone bottom (2) of the storage box are respectively in a cone shape protruding upwards and downwards.
5. The cone-type primer tank structure according to any one of claims 1-4, wherein the front cone bottom (1) of the tank and the front tank shell (A15) are connected through a front r-shaped ring (6), and the upper end of the front r-shaped ring (6) is connected with a stage section (A4); the rear cone bottom (2) of the storage box is connected with the rear box shell (A25) through a rear r-shaped ring (7), and the lower end of the rear r-shaped ring (7) is connected with a power cabin (A5).
6. The cone-type primer arrow tank structure according to claim 5, characterized in that the front r-shaped ring (6) and the rear r-shaped ring (7) are connected with the adjacent stage section (A4) or the power compartment (A5) through respective first butt ends (8); the first butt joint end (8) is provided with a first connecting hole (9), the stage section (A4) and the power cabin (A5) are both provided with a second connecting hole (10), and the first connecting hole (9) and the second connecting hole (10) are aligned and are provided with bolts or rivets in a penetrating mode.
7. The cone-type primer arrow storage box structure according to claim 5, characterized in that the front r-shaped ring (6) and the rear r-shaped ring (7) are both provided with grooves (11) from the outer side to the inner side or from the inner side to the outer side.
8. The cone-type primer arrow tank structure according to claim 5, characterized in that the front r-type ring (6) and the rear r-type ring (7) are each connected to the adjacent front tank housing (A15) or rear tank housing (A25) by respective second butt ends (12); the front r-shaped ring (6) and the rear r-shaped ring (7) are connected with the adjacent front cone bottom (1) or the rear cone bottom (2) of the storage tank through respective third butt ends (13).
9. The cone-type primer rocket tank structure according to claim 8, wherein the second butt end (12) and the third butt end (13) are both grooved (14) to engage with connected components and connected by a lock bottom weld.
10. The cone-type primer rocket tank structure according to claim 8, wherein the second butt end (12) and the third butt end (13) are the same thickness as the connected components and are connected by a butt weld.
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