JPH04310500A - Heat resistant fixing device - Google Patents
Heat resistant fixing deviceInfo
- Publication number
- JPH04310500A JPH04310500A JP7620791A JP7620791A JPH04310500A JP H04310500 A JPH04310500 A JP H04310500A JP 7620791 A JP7620791 A JP 7620791A JP 7620791 A JP7620791 A JP 7620791A JP H04310500 A JPH04310500 A JP H04310500A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- resistant
- screw
- fixed
- heat resistant
- 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.)
- Withdrawn
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 230000008646 thermal stress Effects 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
Landscapes
- Bolts, Nuts, And Washers (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、宇宙航行体の耐熱部材
等の高温にさらされる部材を固着する耐熱性固着装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant fixing device for fixing members exposed to high temperatures, such as heat-resistant members of spacecraft.
【０００２】0002
【従来の技術】従来の宇宙往還機等の宇宙航行体におい
ては、大気圏再突入時に発生する空力加熱から機体をま
もる熱防護用として耐熱パネルを機体の外面に取付けて
いる。宇宙航行体の大気圏再突入時においては、耐熱パ
ネルの温度は千数百度に加熱されるために、耐熱パネル
としては、カーボン繊維強化カーボン複合材（以下ｃ／
ｃという）又は耐熱合金ハニカムサンドイッチパネル等
の耐熱性の高いものを用い、これを、グラファイト・ポ
リイミド複合材（以下Ｇｒ／Ｐｉ複合材という）又はア
ルミ合金製等の耐熱性が低い機体の主構造材に断熱材を
はさんで取付けている。この場合、前記耐熱パネルは前
記機体の主構造材に取付けられたフィッティングに固着
装置としての耐熱ファスナを介して取付けられている。2. Description of the Related Art In conventional space vehicles such as spacecraft, heat-resistant panels are attached to the outer surface of the spacecraft for thermal protection to protect the spacecraft from aerodynamic heating that occurs upon re-entry into the atmosphere. When a spacecraft re-enters the atmosphere, the temperature of the heat-resistant panel is heated to several hundred degrees.
The main structure of the fuselage is made of a material with low heat resistance such as graphite polyimide composite material (hereinafter referred to as Gr/Pi composite material) or aluminum alloy. It is installed by sandwiching insulation material between the materials. In this case, the heat-resistant panel is attached to a fitting attached to the main structural member of the fuselage via a heat-resistant fastener as a fixing device.
【０００３】この従来の耐熱ファスナを図６によって説
明する。耐熱パネル５の円錐状の穴に截頭円錐状の頭部
をもつ金属製の耐熱スクリュー２を挿入し、同耐熱スク
リュー２とナット又はナットプレート等のフィッティン
グ４に固定されたナット類３によって耐熱パネル５を機
体の主構造材に取付けられたフィッティング４に取付け
ている。またこの場合、耐熱スクリュー２と耐熱パネル
５との間には、セラミック短繊維を固めたセラミックペ
ーパー１１が介装される。This conventional heat-resistant fastener will be explained with reference to FIG. A metal heat-resistant screw 2 with a truncated conical head is inserted into the conical hole of the heat-resistant panel 5, and the heat-resistant screw 2 and nuts 3 fixed to a fitting 4 such as a nut or a nut plate are used to make the heat-resistant panel 5 heat-resistant. A panel 5 is attached to a fitting 4 attached to the main structural member of the fuselage. Further, in this case, a ceramic paper 11 made of hardened ceramic short fibers is interposed between the heat-resistant screw 2 and the heat-resistant panel 5.
【０００４】0004
【発明が解決しようとする課題】前記図６に示す耐熱フ
ァスナにおいては、図７（ａ）に示すように、耐熱スク
リュー２の頭部の截頭円錐の頂点が常温時に耐熱パネル
５内にある場合に、耐熱パネル５と耐熱スクリュー２が
高温になると、耐熱パネル５に比して熱膨張が大きい耐
熱スクリュー２は、図７（ｂ）に示すように軸方向へ伸
びてゆるみが発生する。また、図８（ａ）に示すように
、耐熱スクリュー２の頭部の截頭円錐の頂点が常温時に
ナット類３内にある場合に、耐熱パネル５と耐熱スクリ
ュー２が高温になると、耐熱スクリュー２の頭部が広が
り耐熱パネル５に熱応力が生ずる。[Problems to be Solved by the Invention] In the heat-resistant fastener shown in FIG. 6, as shown in FIG. 7(a), the apex of the truncated cone of the head of the heat-resistant screw 2 is within the heat-resistant panel 5 at room temperature. In this case, when the heat-resistant panel 5 and the heat-resistant screw 2 reach a high temperature, the heat-resistant screw 2, which has a larger thermal expansion than the heat-resistant panel 5, stretches in the axial direction and becomes loosened, as shown in FIG. 7(b). Moreover, as shown in FIG. 8(a), when the apex of the truncated cone of the head of the heat-resistant screw 2 is inside the nuts 3 at room temperature, when the heat-resistant panel 5 and the heat-resistant screw 2 become high temperature, the heat-resistant screw 2 2 expands, and thermal stress is generated in the heat-resistant panel 5.
【０００５】この耐熱ファスナにおいては、セラミック
ペーパー１１によって、耐熱パネル５に対して熱膨張が
大きい耐熱スクリュー２の前記の高温時の熱膨張による
ゆるみ、熱応力等を吸収しようとしているが、セラミッ
ク短繊維を固めたセラミックペーパー１１は面外方向弾
性率と復元力が低く、これを十分に吸収することができ
なく、また、耐熱パネル５と耐熱ファスナの変位等によ
りちぎれて飛散することがあった。In this heat-resistant fastener, the ceramic paper 11 is intended to absorb the loosening, thermal stress, etc. caused by the thermal expansion at high temperatures of the heat-resistant screw 2, which has a large thermal expansion relative to the heat-resistant panel 5. The ceramic paper 11 made of hardened fibers has a low out-of-plane modulus of elasticity and restoring force, and cannot sufficiently absorb this, and may be torn and scattered due to displacement of the heat-resistant panel 5 and heat-resistant fasteners. .
【０００６】本発明は、以上の問題点を解決することが
できる耐熱性固着装置を提供しようとするものである。The present invention aims to provide a heat-resistant fixing device that can solve the above problems.
【０００７】[0007]
【課題を解決するための手段】本発明は、被固着側部材
の錐状の穴に係合する截頭錐状の頭部を有し固着側部材
に固定される耐熱スクリューを備えた耐熱性固着装置に
おいて、前記耐熱スクリューがセラミッククロスワッシ
ャを介して固着側部材に固定され、かつ、前記耐熱スク
リューの頭部を形成する截頭錐形状の頂点が前記セラミ
ッククロスワッシャと固着側部材の接触面に位置するよ
うにした。[Means for Solving the Problems] The present invention provides a heat-resistant screw having a truncated cone-shaped head that engages with a conical hole of a member to be fixed, and a heat-resistant screw fixed to the member to be fixed. In the fixing device, the heat-resistant screw is fixed to the fixing-side member via a ceramic cross washer, and the apex of the frusto-conical shape forming the head of the heat-resistant screw is a contact surface between the ceramic cross washer and the fixing-side member. It was located at .
【０００８】[0008]
【作用】本発明では、耐熱スクリューは耐熱パネルより
熱膨張が大きいが、同耐熱スクリューの頭部を形成する
截頭錐の形状の頂点がセラミッククロスワッシャと固着
側部材の接触面に位置しているために、耐熱スクリュー
と耐熱パネルが高温になった場合耐熱スクリューの頭部
は耐熱パネルとの接触面である錐状の穴の面に沿って膨
張し、ゆるみ及び熱応力を発生することがない。[Function] In the present invention, the heat-resistant screw has a larger thermal expansion than the heat-resistant panel, but the apex of the truncated conical shape forming the head of the heat-resistant screw is located at the contact surface between the ceramic cross washer and the fixed side member. Therefore, when the heat-resistant screw and heat-resistant panel reach high temperatures, the head of the heat-resistant screw expands along the surface of the conical hole that is the contact surface with the heat-resistant panel, causing loosening and thermal stress. do not have.
【０００９】また、セラミッククロスワイヤは、面内方
向に高い強度を有し、固着装置の耐音響性と耐振性を高
めると共に、非線形の弾性率と復元性を有するために、
耐熱スクリューの締付けによって、耐熱パネルに不必要
な応力が発生することがない。[0009] Furthermore, the ceramic cross wire has high strength in the in-plane direction, improves the sound resistance and vibration resistance of the fixing device, and has nonlinear elastic modulus and restorability.
Tightening of the heat-resistant screws does not generate unnecessary stress on the heat-resistant panel.
【００１０】0010
【実施例】本発明の一実施例を図１ないし図５によって
説明する。本実施例は、図４に示すように、宇宙往還機
のＧｒ／Ｐｉ複合材又はアルミ合金製の主構造材８にボ
ルト６とナット７を介して取付けられたフィッティング
４にｃ／ｃ又は耐熱合金ハニカムサンドイッチパネル等
の耐熱パネル５を取付ける耐熱性の固着装置に係る。な
お、図４中、９は耐熱パネル５と主構造材８の間に充填
された断熱材である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained with reference to FIGS. 1 to 5. In this embodiment, as shown in FIG. 4, a C/C or heat-resistant This invention relates to a heat-resistant fixing device for attaching a heat-resistant panel 5 such as an alloy honeycomb sandwich panel. In addition, in FIG. 4, 9 is a heat insulating material filled between the heat-resistant panel 5 and the main structural member 8.
【００１１】本実施例では、図１ないし図３に示すよう
に、金属性の耐熱スクリュー２の頭部２ａは截頭円錐状
に形成され、この頭部が耐熱パネル５の円錐状の穴５ａ
に挿入されて係合する。フィッティング４と耐熱パネル
５の間には、セラミック長繊維を織成した織布を数枚重
ねて縫合わせた環状のセラミッククロスワッシャ１が介
装されている。前記耐熱スクリュー２の頭部２ａを形成
する截頭円錐形状の頂点は、常温時に、図１に示すよう
に、フィッティング４のセラミッククロスワッシャ１に
接触する面内に位置するように設定される。前記耐熱ス
クリュー２は、セラミッククロス１とフィッティング４
を貫通してフィッティング４のセラミッククロスワッシ
ャの反対側に取付けられたナット類（ナット又はナット
プレート）３に螺合され、これによって耐熱パネル５が
同耐熱スクリュー２を介してフィッティング４に固着さ
れる。In this embodiment, as shown in FIGS. 1 to 3, the head 2a of the metal heat-resistant screw 2 is formed in the shape of a truncated cone, and this head fits into the conical hole 5a of the heat-resistant panel 5.
is inserted and engaged. An annular ceramic cross washer 1 is interposed between the fitting 4 and the heat-resistant panel 5. The annular ceramic cloth washer 1 is made of several layers of woven fabric made of ceramic long fibers and sewn together. The apex of the frustoconical shape forming the head 2a of the heat-resistant screw 2 is set to be located within the plane that contacts the ceramic cross washer 1 of the fitting 4, as shown in FIG. 1, at room temperature. The heat-resistant screw 2 has a ceramic cloth 1 and a fitting 4.
The heat-resistant panel 5 is fixed to the fitting 4 via the heat-resistant screw 2. .
【００１２】以上のように構成された本実施例では、耐
熱パネル５は耐熱スクリュー２を介してフィッティング
４に固着される。耐熱パネル５と金属製の耐熱スクリュ
ー２が高温になった場合、耐熱パネル５より熱膨張率の
大きい耐熱スクリュー２には大きい熱膨張（通常３〜１
０倍の熱膨張）が発生するが、図１及び図５に示すよう
に、常温時に耐熱スクリュー２の頭部２ａの截頭円錐状
の形状の頂点はフィッティング４の上面（図５では便宜
上セラミッククロスワッシャの図示が省略されている）
にあるために、図５（ｂ）に示すように、同頭部２ａは
耐熱パネル５の円錐状の穴５ａの面に沿って膨張する。
従って、耐熱パネル５に熱応力が発生することがない。In this embodiment constructed as described above, the heat-resistant panel 5 is fixed to the fitting 4 via the heat-resistant screw 2. When the heat-resistant panel 5 and the metal heat-resistant screw 2 reach a high temperature, the heat-resistant screw 2, which has a higher coefficient of thermal expansion than the heat-resistant panel 5, has a large thermal expansion coefficient (usually 3 to 1
However, as shown in FIGS. 1 and 5, at room temperature, the apex of the truncated conical shape of the head 2a of the heat-resistant screw 2 is located on the upper surface of the fitting 4 (for convenience, in FIG. (The illustration of the cross washer is omitted)
5(b), the head 2a expands along the surface of the conical hole 5a of the heat-resistant panel 5. Therefore, no thermal stress is generated in the heat-resistant panel 5.
【００１３】また、フィッティング４と耐熱パネル５と
の間にはセラミック長繊維を織成した織布を縫合わせた
セラミッククロスワッシャ１が介装されており、このセ
ラミッククロスワッシャ１は面外方向に適当な非線形の
弾性率と復元性を有しているために、装着時における耐
熱パネル５の板厚の誤差によるガタを防止し、また耐熱
スクリュー締付け時に耐熱パネル５に応力が発生するこ
とを防止することができる。[0013] Also, a ceramic cross washer 1 made of a woven fabric made of ceramic filaments sewn is interposed between the fitting 4 and the heat-resistant panel 5, and the ceramic cross washer 1 has a suitable shape in the out-of-plane direction. Since it has a non-linear elastic modulus and restorability, it prevents rattling due to an error in the thickness of the heat-resistant panel 5 during installation, and also prevents stress from being generated in the heat-resistant panel 5 when tightening the heat-resistant screws. be able to.
【００１４】また更に、前記セラミッククロスワッシャ
１は、面内方向の強度が高くてちぎれ飛散することがな
く、本耐熱ファスナの耐音響性と耐振性を高めることが
できる。Furthermore, the ceramic cross washer 1 has high strength in the in-plane direction and does not tear and scatter, thereby improving the sound resistance and vibration resistance of the heat-resistant fastener.
【００１５】なお、前記実施例では、耐熱スクリューの
頭部を截頭円錐状とし、これに対応して耐熱パネルの穴
を円錐状にしているが、これらを角錐状とすることがで
きる。In the above embodiment, the head of the heat-resistant screw is shaped like a truncated cone, and the hole in the heat-resistant panel is shaped like a truncated cone, but these can also be shaped like a pyramid.
【００１６】[0016]
【発明の効果】本発明に係る耐熱性固着装置は請求項１
に記載された構成を有することによって、以上説明した
ように、高温時における熱膨張によるゆるみ及び熱応力
の発生を防止することができ、また耐音響性と耐振性を
向上させることができる。[Effect of the invention] The heat-resistant fixing device according to the present invention is as claimed in claim 1.
By having the configuration described in , as explained above, it is possible to prevent loosening and generation of thermal stress due to thermal expansion at high temperatures, and it is also possible to improve acoustic resistance and vibration resistance.
【図１】本発明の一実施例の縦断面図である。FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
【図２】同実施例の耐熱スクリューを示し、図２（ａ）
はその正面図、図２（ｂ）はその平面図である。FIG. 2 shows the heat-resistant screw of the same example, and FIG. 2(a)
is its front view, and FIG. 2(b) is its plan view.
【図３】同実施例のセラミッククロスワッシャを示し、
図３（ａ）はその平面図、図３（ｂ）はその側面図であ
る。FIG. 3 shows the ceramic cloth washer of the same example,
FIG. 3(a) is a plan view thereof, and FIG. 3(b) is a side view thereof.
【図４】同実施例の固着装置により耐熱パネルを宇宙往
還機の主構造材に取付けた状態を示す説明図である。FIG. 4 is an explanatory diagram showing a state in which the heat-resistant panel is attached to the main structural member of the spacecraft using the fixing device of the same embodiment.
【図５】図５（ａ）は同実施例の常温時の状態、図５（
ｂ）は同実施例の高温時の状態をそれぞれ示す説明図で
ある。FIG. 5(a) shows the state of the same example at room temperature, FIG.
b) is an explanatory diagram showing the state of the same example at high temperature.
【図６】従来の耐熱ファスナの縦断面図である。FIG. 6 is a longitudinal cross-sectional view of a conventional heat-resistant fastener.
【図７】同従来の耐熱ファスナの耐熱スクリューの頭部
の截頭円錐の頂点が耐熱パネル内にある場合の状態を示
し、図７（ａ）は常温時、図７（ｂ）の高温時の状態の
説明図である。FIG. 7 shows the state when the apex of the truncated cone of the head of the heat-resistant screw of the conventional heat-resistant fastener is inside the heat-resistant panel, with FIG. 7(a) at room temperature and FIG. 7(b) at high temperature. FIG.
【図８】同従来の耐熱ファスナの耐熱スクリューの頭部
の截頭円錐の頂点がナット類内にある場合の状態を示し
、図８（ａ）は常温時、図８（ｂ）は高温時の状態の説
明図である。FIG. 8 shows the state when the apex of the truncated cone of the head of the heat-resistant screw of the conventional heat-resistant fastener is inside the nut, FIG. 8(a) is at normal temperature, and FIG. 8(b) is at high temperature. FIG.
１ セラミッククロスワッシャ ２ 耐熱スクリュー ２ａ 耐熱スクリューの頭部 ３ ナット類 ４ ファスナ ５ 耐熱パネル ５ａ 耐熱パネルの穴 ８ 主構造材 1 Ceramic cross washer 2 Heat-resistant screw 2a Heat-resistant screw head 3 Nuts 4 Fastener 5 Heat-resistant panel 5a Heat-resistant panel hole 8 Main structural material
Claims (1)
頭錐状の頭部を有し固着側部材に固定される耐熱スクリ
ューを備えた耐熱性固着装置において、前記耐熱スクリ
ューがセラミッククロスワッシャを介して固着側部材に
固定され、かつ、前記耐熱スクリューの頭部を形成する
截頭錐形状の頂点が前記セラミッククロスワッシャと固
着側部材の接触面に位置することを特徴とする耐熱性固
着装置。1. A heat-resistant fixing device comprising a heat-resistant screw that has a truncated conical head that engages with a conical hole of a member to be fixed and is fixed to the member to be fixed, wherein the heat-resistant screw is fixed to the member to be fixed. The screw is fixed to the fixed side member via a ceramic cross washer, and the apex of the frusto-conical shape forming the head of the heat-resistant screw is located at the contact surface between the ceramic cross washer and the fixed side member. Heat resistant fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7620791A JPH04310500A (en) | 1991-04-09 | 1991-04-09 | Heat resistant fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7620791A JPH04310500A (en) | 1991-04-09 | 1991-04-09 | Heat resistant fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04310500A true JPH04310500A (en) | 1992-11-02 |
Family
ID=13598724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7620791A Withdrawn JPH04310500A (en) | 1991-04-09 | 1991-04-09 | Heat resistant fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04310500A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021080702A1 (en) * | 2019-10-23 | 2021-04-29 | Applied Materials, Inc. | Spring-loaded fastening system for process chamber liners |
-
1991
- 1991-04-09 JP JP7620791A patent/JPH04310500A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021080702A1 (en) * | 2019-10-23 | 2021-04-29 | Applied Materials, Inc. | Spring-loaded fastening system for process chamber liners |
| US11313404B2 (en) | 2019-10-23 | 2022-04-26 | Applied Materials, Inc. | Spring-loaded fastening system for process chamber liners |
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