JPH03124946A - Rocket motor case made of frp - Google Patents
Rocket motor case made of frpInfo
- Publication number
- JPH03124946A JPH03124946A JP26017389A JP26017389A JPH03124946A JP H03124946 A JPH03124946 A JP H03124946A JP 26017389 A JP26017389 A JP 26017389A JP 26017389 A JP26017389 A JP 26017389A JP H03124946 A JPH03124946 A JP H03124946A
- Authority
- JP
- Japan
- Prior art keywords
- motor case
- frp
- pressure
- rocket motor
- joining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 description 12
- 239000003380 propellant Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009730 filament winding Methods 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004761 kevlar Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920003319 Araldite® Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ＦＲＰ製の固体ロケットモータ用ケースに関
するものであり、より詳しくはＦＲＰ製モータケースの
端部部品の接合方法を改良して耐圧を向上すると共によ
り肉厚が薄く、より軽量であるＦＲＰ製モータケースに
関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a case for a solid rocket motor made of FRP, and more specifically to a pressure-resistant case by improving the joining method of end parts of an FRP motor case. The present invention relates to an FRP motor case that is thinner and lighter in weight as well as having improved performance.
〈従来の技術〉
固体ロケットモータは普通耐圧容器内に固体推進薬を充
填し、点火装置により推進薬に着火させ、発生する高温
高圧の燃焼ガスをノズルから噴出させて推進力を得るも
のである。このロケットモータに用いるモータケースは
燃焼ガスの圧力に充分耐える必要があると同時により薄
くして内部により多くの推進薬を充填できるようにする
こと、飛翔時に発生する曲げに耐えることが必要とされ
る。さらには、高速飛翔が要求されたり、多段のロケッ
トモータではより軽量化することが望ましい。これらの
要求を満たすためにより強度の大きい金属を使用し肉厚
を薄くする研究がなされると共に、複合材料、特にＦＲ
Ｐを用いる方法が研究されている又、モータケースの後
部にはノズル、前部にはロケットモータの内圧に耐える
鏡板を取り付けるがロケ・ントモータの製造時には、こ
の後部のノズル（ノズル鏡板）もしくは前部の鏡板の少
なくとも片方を取り外して推進薬を充填するのが普通で
ある。従って、モータケースの端面の少なくとも一方は
取り外しが自在にできなければならない。<Conventional technology> A solid rocket motor normally has a pressure-resistant container filled with solid propellant, ignites the propellant using an ignition device, and generates high-temperature, high-pressure combustion gas that is ejected from a nozzle to obtain propulsive force. . The motor case used for this rocket motor needs to be able to withstand the pressure of the combustion gas, and at the same time, it needs to be thinner so that more propellant can be filled inside, and it needs to be able to withstand the bending that occurs during flight. Ru. Furthermore, high-speed flight is required, and it is desirable to reduce the weight of a multi-stage rocket motor. In order to meet these demands, research has been conducted to use stronger metals and thinner walls, and composite materials, especially FR
In addition, a nozzle is attached to the rear of the motor case, and a head plate that can withstand the internal pressure of the rocket motor is attached to the front of the motor case. It is common practice to remove at least one of the end plates and fill with propellant. Therefore, at least one end face of the motor case must be removable.
ＦＲＰ製のモータケースでも、この両端に部品を接合し
少なくとも一方は取り外し可能とするため、接合用の家
具を取り付けるのが一般的である。その接合法は、例え
ば特開昭６３−７４６２８で開示されているが、第１図
に示す通り、接合用金具１に凹部２を設け、この凹部に
胴部ＦＲＰ４をかみ込ませる方法が取られていた。Even in a motor case made of FRP, parts are joined to both ends of the case and at least one of the parts is made removable, so it is common to attach furniture for joining. The joining method is disclosed in, for example, Japanese Patent Laid-Open No. 63-74628, and as shown in FIG. was.
〈発明が解決しようとする問題点〉
しかしながら、これらの方法では、接合部の集中応力の
ため胴部の圧力より接合部の耐力が弱く、必要な耐力を
もたせるために、胴部全体の肉厚を厚くさせるを得す、
結果として肉厚が厚く、推進薬充填量が少ないモータケ
ースとなっていた。本発明は、ＦＲＰ製ロケットモータ
ケースにおいて、前部鏡板または後部ノズルの接合用金
具を取り付ける際のＦＲＰの接合部の耐力が大きく、か
つ、より薄い肉厚の軽量なモータケースを提供するもの
である。<Problems to be Solved by the Invention> However, in these methods, the yield strength of the joint is weaker than the pressure of the body due to concentrated stress at the joint, and in order to provide the necessary yield strength, the wall thickness of the entire body must be increased. To make it thicker,
The result was a motor case with thick walls and a small amount of propellant. The present invention provides an FRP rocket motor case that has a large yield strength at the FRP joints when attaching the front mirror plate or the rear nozzle joint fittings, and is lightweight with a thinner wall thickness. be.
〈問題点を解決するための手段〉
本発明は、ロケットモータケースにおいて、端部に前部
鏡板及びノズルを接合するに際し、この部品の受圧面積
をモータケース胴部断面積の３０〜８０％とし、胴部Ｆ
ＲＰを曲面状に絞り込み該部品と重ね合わせることを特
徴とするＦＲＰロケットモータケースである。胴部ＦＲ
Ｐと重ね合わせ部のモータケース内側接触部に薄いゴム
シートを介在させるとより有効となり、又、この重ね合
わせ部のモータケース外側近傍にモータケースの接線方
向の巻き付けを胴部より多く巻き付けると更に有効とな
るものである。<Means for Solving the Problems> The present invention provides a rocket motor case in which, when joining the front end plate and the nozzle to the end, the pressure receiving area of these parts is set to 30 to 80% of the cross-sectional area of the body of the motor case. , trunk F
This is an FRP rocket motor case characterized by narrowing RP into a curved shape and overlapping it with the parts. Torso FR
It will be more effective if a thin rubber sheet is interposed between the inside contact part of the motor case at the overlapped part, and it will be even more effective if the motor case is wrapped more tangentially around the outside of the motor case at this overlapped part than the body. It is valid.
本発明で用いるＦＲＰはいわゆる繊維強化プラスチック
で、繊維としては例えばガラス、ケブラ、カーボン等の
材料が用いられる。軽量で強い点からケブラ、カーボン
繊維が好ましく、この中でも弾性率も大きいカーボン繊
維が最も好ましい。これらの繊維を組み合わせて使用す
ることもできる。樹脂としては、一般にＦＲＰの製造に
用いられる硬化性樹脂が用いられる。The FRP used in the present invention is a so-called fiber-reinforced plastic, and the fibers used include materials such as glass, Kevlar, and carbon. Kevlar and carbon fiber are preferable from the viewpoint of being lightweight and strong, and among these, carbon fiber having a high elastic modulus is most preferable. Combinations of these fibers can also be used. As the resin, a curable resin generally used for manufacturing FRP is used.
エポキシ、ポリエステル、ウレタン、フェノール、ポリ
イミド、ビスマレクミド等の樹脂を例に掲げることがで
きる。モータケースは一般にはフィラメントワインディ
ング法で製造される。Examples include resins such as epoxy, polyester, urethane, phenol, polyimide, and bismalecamide. Motor cases are generally manufactured using a filament winding method.
ロケットは、一般にロケットモータが運搬する物体を含
む前部分、推進薬を充填したロケットモータによる後部
分で構成される。又、後部分のロケットモータは、前部
鏡板、点火装置、モータケース、推進薬、ノズル等より
構成される。前部鏡板やノズルは、モータケースの端部
に接合されるが、ＦＲＰ製モータケースを用いる場合、
これらを取り外し可能にするために、後部端ではノズル
取り付は用の部品をＦＲＰと接合し、前部端では前部鏡
板取り付は用の部品をＦＲＰと接合する。尚、前部鏡板
は、点火装置を取り付けたり、ロケットモータが運搬す
る物体を装置可能にしたりする構成になっていることが
多い。A rocket generally consists of a front section containing the object carried by the rocket motor, and a rear section consisting of the rocket motor filled with propellant. The rear rocket motor is composed of a front end plate, an ignition device, a motor case, a propellant, a nozzle, etc. The front end plate and nozzle are joined to the end of the motor case, but when using an FRP motor case,
In order to make these parts removable, the nozzle attachment part is joined to FRP at the rear end, and the front end plate attachment part is joined to FRP at the front end. Note that the front head plate is often configured to attach an ignition device or to enable an object to be carried by the rocket motor.
これらの部品は推進薬が燃焼時燃焼ガス圧力を受けるが
、この部品の受圧面積の最大面積（第３図のＡ部）と胴
部の内断面積（第３図のＢ部）の比を考えると、受圧面
積を変えた場合、その比が３０〜８０％、好ましくは５
０〜７０％とすることにより、充分な接合強度を得るこ
とが可能となる。この面積比Ａ／Ｂが８０％を越えると
モータケースの耐圧が予測よりはるかに小さくなり肉厚
をより厚くしなければならなくなる。この原因は非常に
つかみにくいが、有限要素法による応力解析では、接合
部のＦＲＰの内表面に強い力が加わり、まずこの薄い面
が破壊され、続いて次の層が破壊し、この現象が繰り返
し起こるものと推定される。フィラメントワインデング
法では繊維フィラメントをモータケースの軸方向に対し
ある角度をもたせて巻き付けるいわゆる斜め巻き層だけ
で構成する場合と、斜め巻き層とモータケースの円周方
向に巻き付けるいわゆる円周方向巻き層の複数層で構成
する場合がある。モータケースが受ける内圧及び曲げに
よってケースの壁に発生する軸方向応力は、主に斜め巻
き層が負担し耐力となっている。しかし、この斜め巻き
層が内側から順次切断されるので、接合部のみを補強す
るための層を設けても有効でないことが判明した。本発
明のようにＦＲＰモータケースの端部を絞り込んで受圧
面積が小さい部品と重ね合わせ部を作ることにより、接
合部発生応力が小さくなることは容易に推定されるが、
絞り込みの大きさを上記面積比Ａ／Ｂが８０％以下、好
まし７くは７０％以下となるようにすることにより、集
中応力を小さくできる事が発見でき、斜め巻き層が内側
から順次切断する現象を完全に抑えることができるよう
になった。又、この絞り込みをＡ／Ｂが３０％以下にな
るようにすると、モータケースの曲げに対する耐力が急
激に減少し、ミサイルでは特に急角度旋回をするときに
発生する曲げに耐えられなくなる。又、同時にモータケ
ース端部のＦＲＰの絞り込みが多くなるため、本来なら
推進薬を充填できる容積が減少するので、ロケットモー
タとしてはこの絞り込みを少なくすることが好ましい。These parts receive combustion gas pressure when the propellant is combusted. If you think about it, if you change the pressure receiving area, the ratio will be 30 to 80%, preferably 5.
By setting it to 0 to 70%, it becomes possible to obtain sufficient bonding strength. If this area ratio A/B exceeds 80%, the withstand pressure of the motor case will be much smaller than expected, and the wall thickness will have to be increased. The cause of this is very difficult to understand, but stress analysis using the finite element method shows that a strong force is applied to the inner surface of the FRP at the joint, and this thin surface is destroyed first, followed by the next layer. It is presumed that this occurs repeatedly. In the filament winding method, there are cases in which the fiber filament is wound at a certain angle to the axial direction of the motor case, so-called diagonal winding layer only, and diagonal winding layer and so-called circumferential winding layer in which it is wound in the circumferential direction of the motor case. It may consist of multiple layers. The axial stress generated on the wall of the case due to the internal pressure and bending that the motor case receives is mainly borne by the diagonally wound layer, which provides the strength. However, since this diagonally wound layer is sequentially cut from the inside, it has been found that providing a layer for reinforcing only the joints is not effective. It is easily assumed that the stress generated at the joint will be reduced by narrowing the end of the FRP motor case to create an overlapping part with a component with a small pressure-receiving area as in the present invention.
It was discovered that the concentrated stress can be reduced by adjusting the size of the narrowing so that the above area ratio A/B is 80% or less, preferably 70% or less, and the diagonally wound layer is sequentially cut from the inside. This phenomenon can now be completely suppressed. Furthermore, if the narrowing down is made so that A/B is 30% or less, the bending strength of the motor case will decrease rapidly, and the missile will not be able to withstand the bending that occurs especially when turning at a steep angle. At the same time, since the FRP at the end of the motor case becomes more constricted, the volume that can normally be filled with propellant decreases, so it is preferable to reduce this constriction for a rocket motor.
モータケース端部と接合される部品は第３図及び端部拡
大図第４図のように重ね合わせ部を設けるが、この重ね
合わせ部の深さＬは任意に設計してよい。しかし、少な
くともＦＲＰの肉厚の２倍、薄肉の小径のものでは３倍
以上必要である。これより深さが浅い場合は集中応力が
発生し耐力が減少する。The parts to be joined to the end of the motor case are provided with an overlapping part as shown in FIG. 3 and FIG. 4, which is an enlarged view of the end, but the depth L of this overlapping part may be designed as desired. However, it needs to be at least twice the thickness of FRP, and three times or more for thin and small diameter ones. If the depth is shallower than this, concentrated stress will occur and the yield strength will decrease.
このような構成において、部品とＦＲＰの重ね合わせ部
のモータケース内側接触部に第４図の１０ａのように薄
いゴム弾性層を介在させると、各繊維のテンションが均
一にできるので発生する応力を各繊維が均等に負担でき
、接合部の耐力が増加する。ゴム弾性層はゴム弾性をも
つシートを核部に張りつけたり、ゴムのり状にしたもの
を核部に塗布したのち加熱乾燥もしくは硬化させること
により設けることができる。In such a configuration, if a thin rubber elastic layer is interposed at the contact part inside the motor case of the overlapped part of the component and FRP as shown in 10a in Fig. 4, the tension of each fiber can be made uniform and the stress generated can be reduced. Each fiber can bear the load evenly, increasing the yield strength of the joint. The rubber elastic layer can be provided by pasting a sheet with rubber elasticity on the core, or by applying a rubber paste to the core and then drying or curing it by heating.
この時ゴムの厚さは０．０５ ｍｍ〜１．０ ｍ程度で
よい。At this time, the thickness of the rubber may be about 0.05 mm to 1.0 m.
又、以上の構成において胴部ＦＲＰと部品の重ね合わせ
部のモータケース外側に、モータケースの接線方向に円
周巻き層を第４図のｌｌａのように胴部より多く巻き付
け、ＦＲＰの絞り込み端部を締め付けることにより、接
合部の耐力がより大きくなるので更に有効である。In addition, in the above configuration, a circumferentially wound layer is wound on the outer side of the motor case at the overlapping part of the body part FRP and the parts in the tangential direction of the motor case in a larger amount than the body part as shown in lla in FIG. By tightening the parts, the proof strength of the joint parts becomes larger, which is more effective.
〈実施例〉 以下、実施例によって本発明を具体的に説明する。<Example> Hereinafter, the present invention will be specifically explained with reference to Examples.
第３図に示すような内径２００鰭、長さ６００鴫のモー
タケースのＦＲＰ （以下ＣＦＲＰという）製の本体部
をカーボン繊維（Ｔ ８００８１１−６０００−４０Ｂ
ＴＯＲＡＹ）を用いたフィラメントワインディングに
より作成した。繊維は軸に対し±２５゜の角度で１．６
１ｍｍ、９０°の角度で１．８９＋ｎｍの厚さでワイン
ディングした。マトリックス樹脂にはチバガイキー社の
エポキシ樹脂アラルダイト樹脂ＭＹ２０（硬化剤ＨＹ９
０６）を用いた。繊維樹脂の体積比は６３／３７であっ
た。端部は半球伏の鏡板さし、第３図の左端については
部品直径りを変え、端部拡大図第４図のように更に部品
１ａとＣＦＲＰの重ね合わせ部に０．１ｍｍのゴムＦｉ
、１０ａを入れたものと入れないもの及び第４図のＬ部
に円周巻きがあるものとないものを合計１６個つくり、
部品１ａを固定したのち蓋２０の加圧口２１より静水圧
をかけた。静水圧が２１０ ｋｇｆ／ｃｉに耐えたもの
はＭ２ＯのＱ部に曲げ力を１０００ｋｇ −ｍまで上げ
ていき、この曲げ力に耐えたものは更に曲げ力をかけた
まま静水圧を上げて破壊する圧力を求めた。この結果を
第１表のＮα５〜２０に示す。尚、比較例として第２図
のような従来の接合構造をもつモータケース本体を４木
製作した。この製作方法は上記第３図と同一とした。直
径りを変え、重ね合わせ部１０ａには０．１ｍｍのゴム
板を施した。この供試体についても前記と同様に耐圧試
験を行なった。The main body of the motor case, which has an inner diameter of 200 mm and a length of 600 mm as shown in Fig.
TORAY) by filament winding. 1.6 at an angle of ±25° to the axis
Winding was performed at a thickness of 1 mm at a 90° angle to a thickness of 1.89+nm. The matrix resin is Ciba Gaiki's epoxy resin Araldite resin MY20 (hardening agent HY9).
06) was used. The volume ratio of fiber resin was 63/37. The end part is a hemispherical mirror plate, and the diameter of the part is changed for the left end in Figure 3, and as shown in Figure 4, which is an enlarged view of the end, 0.1 mm of rubber Fi is added to the overlapping part of part 1a and CFRP.
, a total of 16 pieces were made, with and without 10a, and with and without circumferential winding in the L section of Fig. 4.
After the component 1a was fixed, hydrostatic pressure was applied through the pressure opening 21 of the lid 20. For those that can withstand a hydrostatic pressure of 210 kgf/ci, the bending force is increased to 1000 kg -m on the Q part of M2O, and for those that can withstand this bending force, the hydrostatic pressure is increased while the bending force is applied further and it is destroyed. I asked for pressure. The results are shown in Nα5-20 in Table 1. As a comparative example, a four-piece motor case body having a conventional joining structure as shown in FIG. 2 was manufactured. The manufacturing method was the same as that shown in FIG. 3 above. The diameter was changed and a 0.1 mm rubber plate was applied to the overlapping portion 10a. This specimen was also subjected to a pressure test in the same manner as described above.
この結果を第１表のＮｏ、 １〜４に示す。The results are shown in Nos. 1 to 4 in Table 1.
この結果、従来構造では耐圧が１８０ ｋｇｆ／ｃＪな
のに対し、端部を曲面状に絞り込んで受圧部の面積（第
３図のＡ部）とモータケースの胴部断面積（第３図のＢ
部）の面積比Ａ／Ｂが８０〜３０％のものは目標の２１
０ ｋｇｆ／ｃｉ、曲げｍｔ力１０００ｋｇ・ｍに耐え
、特にこの面積比Ａ／Ｂが５０〜７０％とすると目標を
充分満足できる優れた接合力を示した。薄いゴム板を入
れること及び円周巻き層をＬ部に設けることでより優れ
た接合を行なうことができることが判明した。As a result, while the conventional structure has a withstand pressure of 180 kgf/cJ, by narrowing the end to a curved surface, the area of the pressure receiving part (section A in Figure 3) and the cross-sectional area of the body of the motor case (B in Figure 3) have been reduced.
The area ratio A/B of part) is 80 to 30%, which is the target of 21.
It withstood a bending mt force of 0 kgf/ci and a bending mt force of 1000 kg·m, and exhibited excellent bonding strength that fully satisfied the target, especially when the area ratio A/B was 50 to 70%. It has been found that better joining can be achieved by inserting a thin rubber plate and providing a circumferentially wound layer on the L portion.
〈発明の効果〉
本発明の部品接合を特徴とするＦＲＰ製ロケットモータ
ケースは次に示すような効果を発揮する。<Effects of the Invention> The FRP rocket motor case featuring the component joining of the present invention exhibits the following effects.
１） 端部に部品を接合するに際し、胴部ＦＲＰを曲面
状に絞り込むことによって、接合部の耐力を増加させる
ことが可能である。本実施例において、従来の構造では
耐圧が１８０ｋｇｆ／ｃｆｆｌなのに対し、本発明の方
式では２１０ｋｇｆ／ｃｎｌ、曲げ耐力１０００ ｋｇ
−ｍに耐えうろことが判明した。1) When joining parts to the ends, it is possible to increase the yield strength of the joint by narrowing the body FRP into a curved shape. In this example, the conventional structure has a withstand pressure of 180 kgf/cffl, while the method of the present invention has a withstand pressure of 210 kgf/cnl and a bending strength of 1000 kg.
It was found that it could withstand -m.
２） 更に、ＦＲＰと部品の重ね合わせ内側接触部に薄
いゴムシートを介在させることによって、又、この重ね
合わせのモータケース外側近傍にモータケースの接線方
向に円周巻き層を胴部より多く巻き付けることによって
、接合部の耐力がより大きくなることが判った。2) Furthermore, by interposing a thin rubber sheet at the inner contact area of the overlap between the FRP and the parts, and by wrapping more of the circumferential winding layer in the tangential direction of the motor case near the outside of the motor case in this overlap than the body. It was found that this increased the yield strength of the joint.
３） 以上の接合部の強度増加によって、より肉厚が薄
く、より軽量なモータケースを完成することができた。3) By increasing the strength of the joints described above, we were able to create a thinner and lighter motor case.
第１図は従来の接合構造をもつＦＲＰ製ロケットモータ
ケースの紺断面図であり、第２図は同じ構造で耐圧及び
曲げ試験に用いられたモーフケスである。
第３図は本発明の接合構造をもつＦＲＰ製ロテロケント
モータケース耐圧及び曲げ試験に用いられたもので、第
４図はその接合部の拡大図である。
１ａ−−・接合用金具（モータケース前部端）■ｂ ・
接合用金具（モータケース後部端）２ａ −接合用金具
四部（モータケース前部端）２ｂ−一接合用金具凹部（
モータケース後部端）３− 前部鏡板、４−胴部ＦＲＰ
、５−ノズル、１０ａ−ゴム板（モータケース前部端）
１０ｂ−−ゴム板（モータケース後部端）１１ａ−重ね
合わせ部円周巻き層（モータケース前部端）
ｉｔｂ・・−重ね合わせ部円周巻き層（モータケース後
部端）
２０− ・ノズル側蓋、 ２１−静水圧加圧口Ａ−・−
接合用金具１ａの受圧最大面積Ｂ −一−−−−胴部の
内断面積
Ｄ・−接合用金具１ａの受圧部直径
Ｐ及びＱ−負荷時固定端及び負荷端
（以下余白）
３２８−Figure 1 is a dark blue sectional view of an FRP rocket motor case with a conventional joint structure, and Figure 2 is a morph case with the same structure used for pressure resistance and bending tests. FIG. 3 shows an FRP Rotelokent motor case having the joint structure of the present invention used for pressure resistance and bending tests, and FIG. 4 is an enlarged view of the joint. 1a--Joining metal fittings (front end of motor case) ■b ・
Joining fittings (rear end of motor case) 2a - Four joining fittings (front end of motor case) 2b - One joining fitting recess (
Motor case rear end) 3- Front head plate, 4- Body FRP
, 5-nozzle, 10a-rubber plate (front end of motor case)
10b--Rubber plate (rear end of motor case) 11a--overlapping part circumferentially wound layer (motor case front end) itb...-overlapping part circumferentially wound layer (motor case rear end) 20--Nozzle side lid , 21-Isostatic pressure pressurization port A-・-
Maximum pressure-receiving area B of the joining fitting 1a -1 - Internal cross-sectional area D of the body - Diameter P and Q of the pressure-receiving part of the joining fitting 1a - Fixed end under load and loaded end (hereinafter referred to as margin) 328-
Claims (1)
及びノズルを接合するに際し、この部品の受圧面積をモ
ータケースの胴部断面積の３０％ないし８０％とし、胴
部ＦＲＰを曲面状に絞り込み該部品の受圧面と重ね合わ
せることを特徴とするＦＲＰ製モータケース。(1) When joining the front mirror plate and nozzle to the end of the rocket motor case, the pressure-receiving area of these parts is set to 30% to 80% of the cross-sectional area of the body of the motor case, and the body FRP is narrowed into a curved shape. An FRP motor case characterized by being overlapped with the pressure receiving surface of the component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1260173A JPH0668260B2 (en) | 1989-10-06 | 1989-10-06 | FRP rocket motor case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1260173A JPH0668260B2 (en) | 1989-10-06 | 1989-10-06 | FRP rocket motor case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03124946A true JPH03124946A (en) | 1991-05-28 |
| JPH0668260B2 JPH0668260B2 (en) | 1994-08-31 |
Family
ID=17344335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1260173A Expired - Fee Related JPH0668260B2 (en) | 1989-10-06 | 1989-10-06 | FRP rocket motor case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0668260B2 (en) |
-
1989
- 1989-10-06 JP JP1260173A patent/JPH0668260B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0668260B2 (en) | 1994-08-31 |
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