CN112747636B - Anti-collision ring reinforcing structure and preparation method thereof - Google Patents
Anti-collision ring reinforcing structure and preparation method thereof Download PDFInfo
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- CN112747636B CN112747636B CN202011614242.1A CN202011614242A CN112747636B CN 112747636 B CN112747636 B CN 112747636B CN 202011614242 A CN202011614242 A CN 202011614242A CN 112747636 B CN112747636 B CN 112747636B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
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Abstract
The invention provides an anti-collision ring reinforcing structure and a preparation method thereof, wherein the anti-collision ring reinforcing structure comprises a plurality of groups of reinforcing rings on the inner wall surface of an anti-collision ring, each reinforcing ring comprises a plurality of reinforcing ribs, gaps are reserved among the reinforcing ribs, the sections of the reinforcing ribs are T-shaped, the wide surfaces of the reinforcing ribs are attached to the inner wall surface of the anti-collision ring, a connecting assembly is arranged between every two adjacent reinforcing ribs and comprises connecting plates symmetrically arranged on the two sides of the narrow surface of each reinforcing rib, kidney-shaped holes are formed in the two ends of each connecting plate, through holes are formed in the reinforcing ribs, bolts are matched with the kidney-shaped holes and the through holes to connect the two adjacent reinforcing ribs through the connecting plates, and the two symmetrical connecting plates are provided with mutually close arched parts. The reinforcing ribs and the connecting plates are arranged in a split mode, so that the reinforcing ribs are always attached to the inner wall surface of the anti-collision ring when the reinforcing ribs expand with heat and contract with cold, the oppositely arranged arched parts of the connecting plates are close to each other and are tightly attached to each other when the anti-collision ring is impacted by external force, and the pressure is dispersed through the arched structures, so that the structural strength of the reinforcing rings is improved.
Description
Technical Field
The invention relates to the technical field of rocket anti-collision rings, in particular to an anti-collision ring reinforcing structure and a preparation method thereof.
Background
The anti-collision ring of the rocket engine has high requirements on strength and rigidity, and meanwhile, the required weight is light, the structural space of the anti-collision ring is more tightly limited because of meeting the requirements on pneumatic appearance, and in order to meet the requirements on the strength and rigidity of the anti-collision ring, a plurality of annular metal reinforcing ribs are usually arranged on the inner wall surface of the anti-collision ring to increase the structural strength of the anti-collision ring.
However, the metal reinforcing ribs are heavy and easily cause instability of the engine, and meanwhile, the metal reinforcing ribs have high thermal expansion coefficients and easily cause structural instability to influence the normal operation of the rocket engine. Therefore, those skilled in the art are urgently required to develop a reinforcing structure of an anti-collision ring, which has light weight, low thermal expansion coefficient, and strong structural strength and rigidity, so as to ensure stable operation of a rocket engine.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects that in the prior art, annular metal reinforcing ribs are adopted in a rocket anti-collision ring, the weight is large, and the reinforcing ribs are easy to cause structural instability when expanding with heat and contracting with cold, the invention provides an anti-collision ring reinforcing structure and a preparation method thereof.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an anticollision ring additional strengthening, is including locating the multiunit beaded finish on the anticollision intra-annular wall, the multiunit the beaded finish sets up along anticollision ring length direction interval, the beaded finish includes a plurality of strengthening ribs that evenly set up along anticollision intra-annular wall circumference, leave the clearance between the strengthening rib, the strengthening rib cross-section is the T style of calligraphy, anticollision intra-annular wall is located in the subsides of strengthening rib broadside, adjacent two be equipped with coupling assembling between the strengthening rib, coupling assembling locates the connecting plate of strengthening rib leptoprosopy both sides including the symmetry, the connecting plate both ends are equipped with waist shape hole, be equipped with on the strengthening rib with waist shape hole complex through-hole, the bolt with waist shape hole and through-hole cooperation pass through the connecting plate with adjacent two strengthening ribs and connect, two that the symmetry set up the connecting plate interlude is equipped with the hunch-up portion that is close to each other.
The reinforcing rings are arranged in the anti-collision rings and used for enhancing the structural strength of the anti-collision rings, each reinforcing ring is composed of a plurality of reinforcing ribs and a connecting plate between the reinforcing ribs, the connecting plates and the reinforcing ribs penetrate through the through holes and the waist-shaped holes through bolts and are used for ensuring that the bolts at two ends of each reinforcing rib can move in the waist-shaped holes of the connecting plates when the reinforcing ribs expand with heat and contract with cold, so that the reinforcing ribs are ensured to be always attached to the inner walls of the anti-collision rings; when the anti-collision ring is suddenly collided by external force, the bolts at the two ends of the reinforcing rib are clamped with the waist-shaped holes on the connecting plates, the arched parts on the two connecting plates are pressed to be mutually attached, the arched parts play a role of dispersing pressure, and the deformation resistance of the reinforcing ring is improved; if the external force is too large, the connecting plate is collapsed and deformed, and only the connecting plate needs to be replaced during subsequent maintenance, so that the cost is saved.
Further, the minimum clearance between the two arched parts is not more than 1.5mm.
Further, for install the strengthening rib on the anticollision intra-annular wall, the strengthening rib is connected with the bonding of anticollision intra-annular wall. The reinforcing ribs are adhered with the inner wall surface of the anti-collision ring by the E-120HP glue.
Furthermore, be equipped with first connecting hole on the broad face of strengthening rib intermediate position department, be equipped with on the anticollision ring lateral wall with first connecting hole complex second connecting hole, wear to be equipped with the screw in first connecting hole and the second connecting hole, fix the strengthening rib on the anticollision ring through nut and screw cooperation.
After the reinforcing rib and the inner wall surface of the anti-collision ring are glued and bonded by the E-120HP glue, the glue can not be immediately solidified and stick the reinforcing rib, the screw penetrates through the first connecting hole and the second connecting hole to be matched with the nut, the position of the reinforcing rib is fixed, the reinforcing rib position is prevented from being deviated in the glue solidification process, the middle position of the reinforcing rib arranged by the first connecting hole, namely the middle position of the reinforcing rib fixed by the screw, and the slight expansion capability of the reinforcing rib during expansion with heat and contraction with cold can not be influenced.
The invention also provides a preparation method of the anti-collision ring reinforcing structure,
the method comprises the following steps: preparing a reinforcing rib, wherein the reinforcing rib prepreg is T300/XY7521 carbon fiber plain cloth prepreg and is 0.2mm in single layer thickness, two L-shaped pieces are laid firstly, 8 layers of the L-shaped pieces are laid together, the thickness of each L-shaped piece is 1.6mm, the length of each L-shaped piece is determined according to specific conditions, the radian of each L-shaped piece is the same as that of the inner wall surface of an anti-collision ring, the long sides of the L-shaped pieces are attached back to back after the laying of the two L-shaped pieces is finished, one straight-shaped piece is laid on the L-shaped short sides of the two L-shaped pieces, the thickness of the 8 layers of the L-shaped pieces is laid together, the length of the straight-shaped piece is the same as that of the L-shaped piece, the width of the straight-shaped piece is equal to the sum of the short sides of the two L-shaped pieces, the radian of the straight-shaped piece is the same as that of the inner wall surface of the anti-collision ring, the straight-shaped pieces and the two L-shaped pieces are thermally cured in a hot-pressing tank mode, and the curing parameters of the reinforcing rib are as follows: vacuum not less than 0.085MPa, heating to 95 deg.C at a temperature not higher than 2.0 deg.C/min, pressurizing to 0.3MPa, and maintaining for 180min (125-130 deg.C); finally, the temperature is reduced to below 60 ℃ at a speed of not more than 2 ℃/min and the steel plate is taken out of the furnace;
step two: processing waist-shaped holes at two ends of the connecting plate, and processing through holes matched with the waist-shaped holes at two ends of the reinforcing ribs;
step three: assembling the reinforcing ring, coating le tai E-120HP glue on the inner wall surfaces of the reinforcing ribs and the anti-collision ring for bonding, leaving gaps between the reinforcing ribs, trying to assemble and polishing the reinforcing ribs to ensure, assembling two connecting plates between the two reinforcing ribs, oppositely arranging the two connecting plates on two sides of the narrow surfaces of the reinforcing ribs, oppositely arranging the arch parts on the connecting plates, and fixing the positions of the connecting plates by passing through the through holes and the waist-shaped holes through bolts.
The carbon fiber composite material has strong designability, the physical and chemical properties of the carbon fiber composite material, such as mechanics, machinery, heat, corrosion resistance, ageing resistance and the like, can replace the metal reinforcing ribs to play a role, is consistent with the composite material anti-collision ring material, meets the material and structure uniformity, and does not generate chemical reaction on material components in the processing process. The carbon fiber composite material has high tensile strength, large modulus, small density, high specific strength and high specific modulus; compared with the traditional metal material, the carbon fiber composite material has the advantages of light weight, high strength and high toughness, has an obvious effect on reducing the weight of the whole rocket engine, and can effectively improve the rocket range; the carbon fiber composite material has good high and low temperature resistance and higher heat conductivity coefficient, and has the tendency of shrinkage along with the rise of temperature, good size temperature and good fatigue resistance; the carbon fiber is corrosion resistant, ageing resistant and long in service life, can resist acid, alkali, salt, partial organic solvent and other corrosive erosion, has incomparable superiority in the field of corrosion prevention compared with other metals, and has good water resistance, ageing resistance and long service life. The composite material anti-collision ring reinforcing ribs can improve the overall rigidity of the anti-collision ring, have the effect of reducing weight compared with metal reinforcing ribs, and can improve the stability of the whole rocket engine.
The invention has the beneficial effects that: according to the anti-collision ring reinforcing structure and the manufacturing method thereof, the multiple groups of reinforcing rings are arranged in the anti-collision ring to improve the structural strength of the anti-collision ring, the reinforcing ribs and the connecting plates are arranged in a split mode to ensure that the reinforcing ribs are always attached to the inner wall surface of the anti-collision ring when the reinforcing ribs expand with heat and contract with cold, the oppositely arranged arch parts of the connecting plates are close to each other and are tightly attached to each other when the anti-collision ring is impacted by external force, pressure is dispersed through the arch structures, the structural strength of the reinforcing rings is improved, and only the connecting plates need to be replaced after general impact, so that the cost is saved.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic cross-sectional view of a preferred embodiment of the present invention;
FIG. 2 is a side view of the preferred embodiment of the present invention;
FIG. 3 is an enlarged schematic view of A in FIG. 2;
FIG. 4 is a schematic view of a nut and a screw for fastening a reinforcing rib to the anti-collision ring;
fig. 5 is a schematic illustration of the preparation of a reinforcing bar.
In the figure: 1. the anti-collision device comprises an anti-collision ring, 2 parts of reinforcing ribs, 2-1 parts of L-shaped parts, 2-2 parts of straight-line-shaped parts, 3 parts of connecting plates, 3-1 parts of kidney-shaped holes, 3-2 parts of arched parts, 4 parts of bolts, 5 parts of screws, 6 parts of nuts.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
As shown in fig. 1-5, the anti-collision ring reinforcing structure of the invention comprises three groups of reinforcing rings arranged on the inner wall surface of an anti-collision ring 1, the outer diameter of the anti-collision ring 1 is phi 1900mm, the product structure is a honeycomb sandwich structure, the thickness is 5mm, the three groups of reinforcing rings are arranged at intervals along the length direction of the anti-collision ring 1, each reinforcing ring comprises three reinforcing ribs 2 uniformly arranged along the circumferential direction of the inner wall surface of the anti-collision ring 1, the theoretical arc length of each section of reinforcing rib 2 is about 1980mm, a gap is reserved between the reinforcing ribs 2, the cross section of each reinforcing rib 2 is in a T shape, the wide surface of each reinforcing rib 2 is attached to the inner wall surface of the anti-collision ring 1, a connecting component is arranged between two adjacent reinforcing ribs 2, the connecting component comprises connecting plates 3 symmetrically arranged on two sides of the narrow surface of each reinforcing rib 2, waist-shaped holes 3-1 are arranged at two ends of the connecting plates 3, through holes matched with the waist-shaped holes 3-1 are arranged on the reinforcing ribs 2, bolts 4 are matched with the waist-shaped holes 3-1 to connect the two adjacent reinforcing ribs 2 through the connecting plates 3, and the symmetrically arranged two connecting plates 3-2 are provided with the mutually close-2, and arc-shaped connecting plates are provided with the connecting plates 3-2.
The minimum clearance between the two arched parts 3-2 is not more than 1.5mm.
The reinforcing rib 2 is connected with the inner wall surface of the anti-collision ring 1 in a glued joint mode.
The reinforcing rib 2 is characterized in that a first connecting hole is formed in the wide face of the middle position of the reinforcing rib 2, a second connecting hole matched with the first connecting hole is formed in the side wall of the anti-collision ring 1, a screw 5 penetrates through the first connecting hole and the second connecting hole, and the reinforcing rib 2 is fixed on the anti-collision ring 1 through the matching of a nut 6 and the screw 5.
The preparation method of the reinforced structure of the anti-collision ring comprises the following steps:
the method comprises the following steps: preparing a reinforcing rib 2, wherein the reinforcing rib 2 is made of T300/XY7521 carbon fiber plain cloth prepreg, the single-layer thickness is 0.2mm, two L-shaped pieces 2-1 are laid firstly, the long side is 28.4mm, the short side is 16mm, 8 layers are laid in total, the thickness of the L-shaped pieces is 1.6mm, the length of the L-shaped pieces 2-1 is determined according to specific conditions, the radian of the L-shaped pieces 2-1 is the same as that of the inner wall surface of an anti-collision ring 1, the long sides of the L-shaped pieces 2-1 are attached back to back after the laying of the two L-shaped pieces is finished, a straight-line-shaped piece 2-2 is laid on the short side of the two L-shaped pieces 2-1, the width is 32mm, the thickness of the L-shaped pieces 1.6mm is laid in total, the length of the straight-line-shaped piece 2-2 is consistent with the length of the L-shaped piece 2-1, the width of the straight-shaped piece is equal to the sum of the widths of the short sides of the two L-shaped pieces 2-1, the straight-line-shaped piece 2-2 radian is the same as that of the inner wall surface of the anti-collision ring 1, then the straight-shaped pieces 2-2 and the straight-2 and the two L-1 are thermally cured, the curing mode is a hot-2, the curing mode is a hot-pot, the curing mode: vacuum not less than 0.085MPa, heating to 95 deg.C at a temperature not higher than 2.0 deg.C/min, pressurizing to 0.3MPa, and maintaining for 180min (125-130 deg.C); finally, the temperature is reduced to below 60 ℃ at a speed of not more than 2 ℃/min and the steel plate is taken out of the furnace;
step two: processing waist-shaped holes 3-1 at two ends of the connecting plate 3, and processing through holes matched with the waist-shaped holes 3-1 at two ends of the reinforcing ribs 2;
step three: assembling the reinforcing ring, coating le tai E-120HP glue on the inner wall surfaces of the reinforcing ribs 2 and the anti-collision ring 1, adhering, leaving gaps between the reinforcing ribs 2, and ensuring through trial assembly and polishing, assembling two connecting plates 3 between the two reinforcing ribs 2, wherein the two connecting plates 3 are oppositely arranged on two sides of the narrow surfaces of the reinforcing ribs 2, the arch parts 3-2 on the connecting plates 3 are oppositely arranged, and the bolts 4 penetrate through the through holes and the waist-shaped holes 3-1 to fix the positions of the connecting plates 3.
The mechanical properties of the T300/XY7521 carbon fiber plain cloth prepreg laminated plate are shown in the following table 1;
table 1 prepreg laminate mechanical property data
| Item | Unit of | Mean value of test |
| 0 degree tensile strength | MPa | 689 |
| Tensile strength of 90 DEG | MPa | 665 |
| 0 degree compressive strength | MPa | 583 |
| 90 degree compressive strength | MPa | 576 |
| Interlaminar shear strength | MPa | 65 |
| 0 degree bending strength | MPa | 712 |
| Tensile modulus | GPa | 59.7 |
| Flexural modulus | GPa | 58.2 |
Directions and references (e.g., up, down, left, right, etc.) may be used in the present disclosure only to aid in the description of features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The preparation method of the anti-collision ring reinforcing structure is characterized by comprising the following steps: the anti-collision device comprises a plurality of groups of reinforcing rings arranged on the inner wall surface of an anti-collision ring (1), wherein the groups of reinforcing rings are arranged at intervals along the length direction of the anti-collision ring (1), each reinforcing ring comprises a plurality of reinforcing ribs (2) uniformly arranged along the circumferential direction of the inner wall surface of the anti-collision ring (1), gaps are reserved between the reinforcing ribs (2), the cross sections of the reinforcing ribs (2) are T-shaped, the wide surfaces of the reinforcing ribs (2) are attached to the inner wall surface of the anti-collision ring (1), a connecting component is arranged between every two adjacent reinforcing ribs (2), each connecting component comprises connecting plates (3) symmetrically arranged on two sides of the narrow surface of each reinforcing rib (2), waist-shaped holes (3-1) are formed in the two ends of each connecting plate (3), through holes matched with the waist-shaped holes (3-1) are formed in the reinforcing ribs (2), bolts (4) are matched with the waist-shaped holes to connect the two adjacent reinforcing ribs (2) through the connecting plates (3), and arch parts (3-2) close to each other are formed in the middle sections of the two symmetrically arranged connecting plates (3);
the method comprises the following steps: preparing a reinforcing rib (2), wherein the prepreg of the reinforcing rib (2) adopts T300/XY7521 carbon fiber plain cloth prepreg, the single-layer thickness is 0.2mm, two L-shaped pieces (2-1) are laid firstly, the thickness of the totally laid 8 layers is 1.6mm, the length of the L-shaped piece (2-1) is determined according to specific conditions, the radian of the L-shaped piece (2-1) is the same as that of the inner wall surface of an anti-collision ring (1), the long sides of the L-shaped pieces (2-1) are tightly pasted back to back after the laying of the two L-shaped pieces is finished, a straight-shaped piece (2-2) is laid on the L-shaped short sides of the two L-shaped pieces (2-1), the thickness of the totally laid 8 layers is 1.6mm, the length of the straight-shaped piece (2-2) is the same as that of the L-shaped piece (2-1), the width of the straight-shaped piece (2-2) is equal to the sum of the widths of the short sides of the two L-shaped pieces (2-1), the radian of the straight-shaped piece (2-shaped piece is the same as that of the inner wall surface of the anti-collision ring (1), and then, the straight-shaped piece (2-2) and the reinforcing rib and the two L-1), the curing mode is a hot-shaped piece, and the curing mode is a hot-pressing curing tank, and the curing parameter: vacuum is not less than 0.085MPa, the temperature is raised to 95 ℃ at the temperature rise rate of not more than 2.0 ℃/min, the pressure is 0.3MPa, and the temperature is kept for 180min; finally, the temperature is reduced to below 60 ℃ at the speed of not more than 2 ℃/min, and the mixture is discharged;
step two: waist-shaped holes (3-1) are processed at two ends of the connecting plate (3), and through holes matched with the waist-shaped holes (3-1) are processed at two ends of the reinforcing rib (2);
step three: the assembling of beaded finish, strengthening rib (2) and crashproof ring (1) inner wall face scribble happy tai E-120HP and glue and bond, leave the clearance between strengthening rib (2), the accessible tries on clothes and polishes and guarantee, assemble two connecting plates (3) between two strengthening ribs (2), two connecting plates (3) set up in strengthening rib (2) leptoprosopy both sides relatively, hunch portion (3-2) on connecting plate (3) set up in opposite directions, pass through-hole and waist shape hole (3-1) through bolt (4) with connecting plate (3) fixed in position.
2. A method of making an impact ring reinforcement structure as defined in claim 1, wherein: the minimum clearance between the two arched parts (3-2) is not more than 1.5mm.
3. A method of manufacturing an impact ring reinforcement structure as claimed in claim 1 or 2, wherein: the reinforcing rib (2) is connected with the inner wall surface of the anti-collision ring (1) in a glued joint mode.
4. A method of making a bumper ring reinforcement structure in accordance with claim 1, wherein: be equipped with first connecting hole on the broad face of strengthening rib (2) intermediate position department, be equipped with on anticollision ring (1) lateral wall with first connecting hole complex second connecting hole, wear to be equipped with screw (5) in first connecting hole and the second connecting hole, fix strengthening rib (2) on anticollision ring (1) through nut (6) and screw (5) cooperation.
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| CN112747636B true CN112747636B (en) | 2023-02-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204163196U (en) * | 2014-09-29 | 2015-02-18 | 同济大学 | A kind of embedded concrete-filled steel square tubular column in T-steel top flange and steel beam connecting joint |
| CN204977495U (en) * | 2015-08-31 | 2016-01-20 | 江苏恒神股份有限公司 | T type adds a curing molding device of muscle wallboard |
| CN109263086A (en) * | 2018-10-18 | 2019-01-25 | 江苏三强复合材料有限公司 | Carbon fibre composite frame member and forming method |
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2020
- 2020-12-30 CN CN202011614242.1A patent/CN112747636B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204163196U (en) * | 2014-09-29 | 2015-02-18 | 同济大学 | A kind of embedded concrete-filled steel square tubular column in T-steel top flange and steel beam connecting joint |
| CN204977495U (en) * | 2015-08-31 | 2016-01-20 | 江苏恒神股份有限公司 | T type adds a curing molding device of muscle wallboard |
| CN109263086A (en) * | 2018-10-18 | 2019-01-25 | 江苏三强复合材料有限公司 | Carbon fibre composite frame member and forming method |
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