JP2006170639A - Wind tunnel test system - Google Patents
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- JP2006170639A JP2006170639A JP2004359565A JP2004359565A JP2006170639A JP 2006170639 A JP2006170639 A JP 2006170639A JP 2004359565 A JP2004359565 A JP 2004359565A JP 2004359565 A JP2004359565 A JP 2004359565A JP 2006170639 A JP2006170639 A JP 2006170639A
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本発明は模擬移動路面となるムービングベルトを送風口と吸入口との相互間に設置して、そのベルト上の被測定車両に作用する空気力を測定する風洞実験装置に関する。 The present invention relates to a wind tunnel experimental apparatus in which a moving belt serving as a simulated moving road surface is installed between an air blowing port and a suction port, and an aerodynamic force acting on a vehicle to be measured on the belt is measured.
従来、走行中の車両に作用する空気力（抗力と揚力並びに横力）を測定する風洞実験装置では、その被測定車両をムービングベルト上に固定支持する方法として、図６に示すような測定胴の天井面をなす固定架台（１）から垂下させた剛性な支柱（２）によるストラット式か、又は特開平６−３４１９２０号の図５に見られるような多数本のワイヤー（３２）による吊り線式が採用されている。 Conventionally, in a wind tunnel experimental apparatus for measuring aerodynamic forces (drag, lift and lateral force) acting on a running vehicle, a measuring cylinder as shown in FIG. 6 is used as a method of fixing and supporting the vehicle to be measured on a moving belt. A strut type by a rigid column (2) suspended from a fixed mount (1) forming the ceiling surface of the above, or a suspension line by a large number of wires (32) as shown in FIG. 5 of JP-A-6-341920 The formula is adopted.
そして、その前者のストラット式では被測定車両（Ｍ）に内蔵させた分力天秤（３）により、又後者の吊り線式では天井面に設置した荷重計測器（３４）により、その被測定車両（Ｍ）（１１）に作用する空気力の就中揚力を測定・評価している通例である。
ところが、空気力を左右する最大の要因は車体の輪郭形状であって、その車体表面の凹凸により空気の方向性や流速が変化し、これに応じて空気力も変化することになるところ、上記ストラット式の固定支持方法では被測定車両（Ｍ）の車体表面から支柱（２）が張り出し垂立するため、その付近の空気力を測定・評価する精度に悪影響となる。 However, the biggest factor that affects the aerodynamic force is the contour shape of the vehicle body. The unevenness of the vehicle body surface changes the directionality and flow velocity of the air, and the aerodynamic force changes accordingly. With the fixed support method of the type, since the column (2) protrudes and hangs from the surface of the vehicle body of the vehicle (M) to be measured, the accuracy in measuring and evaluating the aerodynamic force in the vicinity is adversely affected.
他方、上記吊り線式の固定支持方法では多数本のワイヤー（３２）を使用する必要上、その支持状態を調整する作業が甚だ煩雑となり、たとえ特開平６−３４１９２０号発明の図１に示された１本のワイヤー（１７）とバネ（１６）を使用するだけにとどめたとしても、弾性を有する線材に依存する限り、その正確な調整状態を得ることが至難の業であることに変りはない。 On the other hand, in the above-described suspension type fixed support method, it is necessary to use a large number of wires (32), and the work of adjusting the support state becomes extremely complicated, even if shown in FIG. 1 of Japanese Patent Laid-Open No. 6-341920. Even if only one wire (17) and a spring (16) are used, as long as it depends on a wire having elasticity, it is difficult to obtain an accurate adjustment state. Absent.
何れにしても、被測定車両（Ｍ）（１１）をムービングベルト（４）（１２）上に固定支持する従来の方法では、その被測定車両（Ｍ）（１１）のタイヤ（５）（２７）と車体とが所謂縁切れ状態にあり、走行中のタイヤ設置面にかかる荷重を、ムービングベルト（４）（１２）の裏面（下方）から測定することができない。 In any case, in the conventional method of fixing and supporting the measured vehicle (M) (11) on the moving belt (4) (12), the tire (5) (27) of the measured vehicle (M) (11). ) And the vehicle body are in a so-called edge-cut state, and the load applied to the tire installation surface during traveling cannot be measured from the back surface (below) of the moving belts (4) and (12).
つまり、被測定車両（Ｍ）（１１）のタイヤ（５）（２７）がムービングベルト（４）（１２）上に設置されても、その荷重はベルト（４）（１２）の裏面に存在する固定板（固定床面）（６）（２４）によって支持されることとなり、その固定板（６）（２４）は測定機能を有さない結果、タイヤ自身の発生する揚力を測定・評価することができないのである。 That is, even if the tires (5) and (27) of the vehicle to be measured (M) and (11) are installed on the moving belts (4) and (12), the load exists on the back surfaces of the belts (4) and (12). The fixed plate (fixed floor surface) (6) (24) will be supported, and the fixed plate (6) (24) does not have a measurement function. As a result, the lift generated by the tire itself is measured and evaluated. It is not possible.
更に言えば、タイヤ（５）（２７）の荷重を受けたムービングベルト（４）（１２）が、その裏面の固定板（固定床面）（６）（２４）へ押し付けられることになり、大きな摩擦を発生するため、上記ムービングベルト（４）（１２）が早期に摩耗してしまい、その蛇行や損傷などの原因となる問題もある。 Furthermore, the moving belts (4) and (12) that have received the load of the tires (5) and (27) are pressed against the fixed plates (fixed floor surfaces) (6) and (24) on the back surface. Since the friction is generated, the moving belts (4) and (12) are worn at an early stage, and there is a problem of causing meandering and damage.
本発明はこのような問題点の改良を目的としており、その目的を達成するための構成上、請求項１では送風口と吸入口との相互間に設置されたムービングベルトを回走駆動し、その模擬移動路面となるベルト上の被測定車両に作用する空気力を測定する風洞実験装置において、 The present invention aims to improve such problems, and in order to achieve the object, in claim 1, the moving belt installed between the air blowing port and the suction port is driven to rotate, In the wind tunnel experiment device that measures the aerodynamic force acting on the vehicle to be measured on the belt serving as the simulated moving road surface,
上記ムービングベルトの回走運動に追従する転動ローラーと、その転動ローラーを介して被測定車両の全体荷重を受けるロードセルとを、その被測定車両のタイヤと対応位置する複数づつとして上記ベルトの下方へ配設し、 A rolling roller that follows the rotational movement of the moving belt and a load cell that receives the entire load of the vehicle under measurement via the rolling roller are arranged in a plurality corresponding to the tires of the vehicle under measurement. Arranged below,
上記被測定車両の車体のみならず、タイヤから発生する揚力をもムービングベルトの下方から上記ロードセルによって測定できるように定めたことを特徴とする。 It is characterized in that not only the vehicle body of the vehicle to be measured but also the lift generated from the tire can be measured by the load cell from below the moving belt.
又、請求項１に従属する請求項２では、ムービングベルトの下面をベルト吸着孔の多数が開口分布する固定天板と、そのベルト吸着孔へ空気を吸い込むベルト吸着チャンバーによって支持させると共に、
Further, in
上記固定天板とベルト吸着チャンバーが被測定車両のタイヤと対応位置する４個所において切り欠かれた空間へ、上記ベルトの回走運動に追従する転動ローラーの各個を臨ませたことを特徴とする。 The fixed top plate and the belt adsorption chamber have each of the rolling rollers that follow the rotational movement of the belt in spaces cut out at four positions corresponding to the tires of the vehicle to be measured. To do.
請求項１又は２に従属する請求項３では、被測定車両の前輪タイヤに対応位置する左右一対のロードセルと、同じく後輪タイヤに対応位置する左右一対のロードセルとを、各別の取付盤に固定設置すると共に、
In
その各取付盤を被測定車両におけるホイールベースの変化に応じて、前後方向へ位置調整できるように定めたことを特徴とする。 Each of the mounting boards is defined so that the position of the mounting board can be adjusted in the front-rear direction in accordance with the change of the wheel base in the vehicle to be measured.
更に、同じく請求項１又は２に従属する請求項３では、転動ローラーの一定幅を被測定車両におけるトレッドの変化に対応できる広幅な寸法として設定したことを特徴とする。
Further, according to
請求項１の上記構成によれば、被測定車両の荷重がその車体とタイヤとの全体として、ムービングベルトの下方から転動ローラーに受け持たれているため、そのベルトの回走運動に追従して被測定車両のタイヤと転動ローラーが回転することになり、風洞実験中の被測定車両に発生する揚力はタイヤの各個を経て、その真下位置の転動ローラーへ直かに伝わる結果、上記揚力を車体のみならずタイヤのそれも含む全体として、ロードセルにより正しく測定・評価することができる。 According to the above configuration of the first aspect, since the load of the vehicle to be measured is received by the rolling roller from below the moving belt as a whole of the vehicle body and the tire, it follows the rotational movement of the belt. As a result, the tire and rolling roller of the vehicle to be measured rotate, and the lift generated in the vehicle to be measured during the wind tunnel experiment is directly transmitted to the rolling roller immediately below the tire through each of the tires. As a whole, the lift including not only the body but also the tire can be measured and evaluated correctly by the load cell.
しかも、上記ムービングベルトを支持した転動ローラーは、そのベルトに追従して転動するため、摩擦力が大きく低減され、ベルト自身の早期な摩耗などを防止できる効果もあり、耐用性の向上に役立つ。 In addition, the rolling roller that supports the moving belt rolls following the belt, so the frictional force is greatly reduced and the belt itself can be prevented from being worn at an early stage. Useful.
この点、本発明では従来技術に挙げたストラット式や吊り線式の固定支持方法と異なって、剛性な支柱（ストラット）が被測定車両の車体表面から少しも張り出さないため、その揚力測定上の障害を受けるおそれがなく、又吊り線のような固定支持状態の煩雑な調整作業も一切不要となり、簡便な準備状態のもとに高精度な測定効果を得られるのである。 In this respect, in the present invention, unlike the strut-type and suspension-type fixed support methods mentioned in the prior art, the rigid struts do not protrude at all from the vehicle body surface of the vehicle to be measured. There is no risk of being damaged, and no complicated adjustment work of the fixed support state such as a hanging line is required, and a highly accurate measurement effect can be obtained under a simple preparation state.
特に、請求項２の構成を採用するならば、多数の吸着孔が開口分布する固定天板と、その吸着孔へ空気を吸い込むベルト吸着チャンバーによって、被測定車両の模擬移動路面となるムービングベルトを下方からほぼ水平状態に安定良く確保することができ、上記転動ローラーによる支持とも相俟って、そのベルトの安定な回走運動を得られる効果がある。
In particular, if the configuration of
更に、請求項３や請求項４の構成を採用するならば、各種被測定車両におけるホイールベースやトレッドの変化に便利良く対応することができ、風洞実験装置としての汎用性が昂まることになる。
Furthermore, if the structure of
以下、図面に基いて本発明の具体的構成を詳述すると、図１はその風洞実験装置における測定胴の模式的な側断面図、図２〜５は図１から抽出したムービングベルト機構（Ｂ）を示しており、これは送風口（１０）と吸入口（１１）との相互間に設置されて、被測定車両（Ｍ）の模擬移動路面を作り出す。（１２）はこれと向かい合う測定胴の天井面である。 The specific configuration of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic side sectional view of a measuring cylinder in the wind tunnel experimental apparatus, and FIGS. 2 to 5 are moving belt mechanisms (B) extracted from FIG. This is installed between the air blowing port (10) and the suction port (11) to create a simulated moving road surface of the vehicle to be measured (M). (12) is the ceiling surface of the measuring cylinder facing this.
即ち、（１３）（１４）は床面の架台（Ｆ）に軸架されたベルト駆動ローラーと従動ローラーとの並列する一対であり、これらに巻き掛けられた無端なムービングベルト（平ベルト）（１５）が、ベルト駆動モーター（１６）によって風の流れる方向（Ａ）へ回走駆動される。（１７）はそのベルト駆動モーター（１６）と駆動ローラー（１３）との伝動機構を示している。 That is, (13) and (14) are a pair of a belt driving roller and a driven roller which are mounted on a floor base (F) in parallel, and an endless moving belt (flat belt) (flat belt) ( 15) is driven to rotate in the direction of wind flow (A) by the belt drive motor (16). (17) shows a transmission mechanism between the belt drive motor (16) and the drive roller (13).
（１８）は上記ムービングベルト（１５）のテンションローラーであり、そのベルト（１５）の張力が油圧シリンダー（１９）によって調整される。その油圧シリンダー（１９）の作動用油圧ポンプは図示省略してある。又、（２０）（２１）は同じくムービングベルト（１５）の蛇行検知センサーと蛇行制御モーターであり、その蛇行量と蛇行速度を検知したセンサー（２０）からの出力信号を受けた蛇行制御コンピューター（図示省略）が、上記蛇行制御モーター（２１）の回転数を制御するようになっている。 (18) is a tension roller of the moving belt (15), and the tension of the belt (15) is adjusted by a hydraulic cylinder (19). The hydraulic pump for operating the hydraulic cylinder (19) is not shown. Similarly, (20) and (21) are a meandering detection sensor and a meandering control motor of the moving belt (15), and a meandering control computer (receiver) that receives an output signal from the sensor (20) that detects the meandering amount and meandering speed. (Not shown) controls the rotation speed of the meandering control motor (21).
（２２）は上記ムービングベルト（１５）の裏面（下面）に並列設置された複数の固定天板であり、その何れもベルト（１５）に向かって開口分布する多数の小さな吸着孔（２３）を備えている。 (22) is a plurality of fixed top plates installed in parallel on the back surface (lower surface) of the moving belt (15), each of which has a number of small suction holes (23) distributed toward the belt (15). I have.
又、（２４）はその固定天板（２２）の各個へ裏当て一体化されたベルト吸着チャンバーであって、中空の直方体型をなし、図外のベルト吸着ファンと連通状態に接続配管されている。そのベルト吸着ファンから吸引される空気力によって、上記ベルト（１５）が固定天板（２２）へ悉く吸着され、被測定車両（Ｍ）のほぼ水平な移動路面を形作り、ベルト自身の蛇行などを防止できるようになっている。 Also, (24) is a belt suction chamber integrated with each of the fixed top plate (22), which has a hollow rectangular parallelepiped shape and is connected and connected to a belt suction fan (not shown). Yes. Due to the aerodynamic force sucked from the belt suction fan, the belt (15) is attracted to the fixed top plate (22) to form a substantially horizontal moving road surface of the vehicle to be measured (M), and to meander the belt itself. It can be prevented.
但し、上記固定天板（２２）とベルト吸着チャンバー（２４）との複数づつは図２〜５から明白なように、被測定車両（Ｍ）のタイヤ（２５ｆ）（２５ｒ）と対応位置する４個所において、言わば切り欠かれた状態にあり、その４個所での隣り合う相互空間（Ｓ）に限っては、上記ムービングベルト（１５）の裏面（下面）が転動ローラー（２６）によって直接支持されている。（２７）はその各転動ローラー（２６）の軸受ステーであり、断面ほぼＵ字枠状をなしている。 However, as is apparent from FIGS. 2 to 5, the plurality of the fixed top plate (22) and the belt suction chamber (24) are located 4 corresponding to the tires (25f) and (25r) of the vehicle to be measured (M). The parts are in a cut-out state, and the back surface (lower surface) of the moving belt (15) is directly supported by the rolling roller (26) only in the adjacent space (S) at the four places. Has been. (27) is a bearing stay of each of the rolling rollers (26) and has a substantially U-shaped cross section.
しかも、このような転動ローラー（２６）とその軸受ステー（２７）は、その一定幅（Ｗ）の予じめ広幅な寸法に設定されており、これによって各種被測定車両（Ｍ）におけるトレッドの広狭変化に対応・吸収できるようになっている。 Moreover, the rolling roller (26) and its bearing stay (27) are set to have a predetermined wide width (W) and thereby a tread in various vehicles (M) to be measured. It is possible to cope with and absorb the wide and narrow changes.
更に、（２８）は各転動ローラー（２６）の軸受ステー（２７）を下方から支持する揚力測定用のロードセル（歪ゲージ式重量センサー）であり、その被測定車両（Ｍ）の前輪タイヤ（２５ｆ）に対応位置する左右一対と、同じく後輪タイヤ（２５ｒ）に対応位置する左右一対とが、各別の取付盤（２９）（３０）を介して上記架台（Ｆ）の中途高さ位置に搭載されている。 Further, (28) is a load cell (strain gauge type weight sensor) for lift measurement that supports the bearing stay (27) of each rolling roller (26) from below, and the front tire ( A pair of left and right positions corresponding to 25f) and a pair of left and right positions corresponding to the rear wheel tire (25r) are located at intermediate height positions of the gantry (F) via separate mounting plates (29) and (30). It is mounted on.
その場合、架台（Ｆ）の中途高さ位置からは左右一対のスライドガイドレール（３１）が上向き一体的に突設されており、これに沿って上記取付盤（２９）（３０）が被測定車両（Ｍ）の前後方向へ、各別にスライド作用できるようになっている。（３２）はその各取付盤（２９）（３０）を各種被測定車両（Ｍ）におけるホイールベースの変化に応じて、前後方向へスライド調整するためのボールネジ、（３３）はそのボールネジ（３２）の回転駆動用サーボモーターを示している。 In this case, a pair of left and right slide guide rails (31) are integrally projected upward from the midway height position of the gantry (F), and the mounting plates (29) and (30) are measured along this. The vehicle (M) can be individually slid in the front-rear direction. (32) is a ball screw for slidingly adjusting each of the mounting plates (29) and (30) in the front-rear direction according to the change of the wheel base in various vehicles (M) to be measured, and (33) is the ball screw (32). The servo motor for rotational drive is shown.
要するに、本発明の上記ムービングベルト機構（Ｂ）では被測定車両（Ｍ）の荷重をその車体（３４）のみならず、タイヤ（２５ｆ）（２５ｒ）のそれも含む全体として、真下方向から転動ローラー（２６）により受け持ち、その空気力の就中揚力をロードセル（２８）によって測定できるようになっているのである。しかも、上記ムービングベルト（１５）を直かに支持している転動ローラー（２６）は、そのベルト（１５）の回走運動に追従して転動するため、ベルト（１５）との摩擦力が低減され、そのベルト（１５）の耐用性も向上する。 In short, in the moving belt mechanism (B) of the present invention, the entire vehicle including the load of the vehicle to be measured (M) including that of the vehicle body (34) as well as that of the tires (25f) and (25r) is rolled from directly below. It is carried by the roller (26), and the lift force during the aerodynamic force can be measured by the load cell (28). Moreover, since the rolling roller (26) that directly supports the moving belt (15) rolls following the rotational movement of the belt (15), the frictional force with the belt (15) is obtained. And the durability of the belt (15) is improved.
他方、被測定車両（Ｍ）に作用する空気力のうち、その横力と抗力は被測定車両（Ｍ）における車体（３４）の両側面又はタイヤ（２５ｆ）（２５ｒ）を支持するサイドワイヤー（３５）と、その支持点の測定用サイドポスト（３６）によって、やはり正しく測定することができるようになっており、茲にサイド支持ワイヤー（３５）は線材であるため、上記揚力の測定精度に悪影響を及ぼすおそれがない。 On the other hand, of the aerodynamic forces acting on the vehicle to be measured (M), the lateral force and the drag force are the side wires that support both side surfaces of the vehicle body (34) or the tires (25f) and (25r) in the vehicle to be measured (M). 35) and the side post (36) for measuring the support point, it is possible to measure correctly, and the side support wire (35) is a wire rod. There is no risk of adverse effects.
本発明に係る風洞実験装置の使用により、被測定車両（Ｍ）の空気力を測定するに当っては、そのムービングベルト機構（Ｂ）の転動ローラー（２６）や揚力測定用ロードセル（２８）を、タイヤ（２５ｆ）（２５ｒ）の真下へ対応位置するように調整して、その被測定車両（Ｍ）のタイヤ（２５ｆ）（２５ｒ）を悉く転動ローラー（２６）に正しく受け持たせる。 In measuring the aerodynamic force of the vehicle to be measured (M) by using the wind tunnel experimental device according to the present invention, the rolling roller (26) of the moving belt mechanism (B) and the lift cell for load measurement (28). Is adjusted so as to correspond to a position directly below the tires (25f) and (25r), and the rolling rollers (26) that roll the tires (25f) and (25r) of the vehicle to be measured (M) are correctly supported.
そして、ムービングベルト（１５）を回走駆動することにより、被測定車両（Ｍ）のタイヤ（２５ｆ）（２５ｒ）を回転させると共に、風洞の送風口（１０）から一定量の風を図１の矢印方向（Ａ）に沿って、その被測定車両（Ｍ）に作用させるのである。そうすれば、車体（３４）の表面には正圧部と負圧部とが生成され、その圧力差によって空気力が発生することとなる。 Then, by rotating the moving belt (15), the tires (25f) (25r) of the vehicle under test (M) are rotated, and a certain amount of wind is blown from the air vent (10) of the wind tunnel in FIG. It acts on the measured vehicle (M) along the arrow direction (A). If it does so, a positive pressure part and a negative pressure part will be produced | generated on the surface of a vehicle body (34), and aerodynamic force will generate | occur | produce by the pressure difference.
このような風洞実験中、被測定車両（Ｍ）の荷重はタイヤ（２５ｆ）（２５ｒ）のそれも含む全体として、転動ローラー（２６）により受け持たれているため、ムービングベルト（１５）の回走運動に追従して、そのベルト（１５）の上面ではタイヤ（２５ｆ）（２５ｒ）が回転する一方、同じくベルト（１５）の下面（裏面）では転動ローラー（２６）が転動することになり、その過程において発生した揚力はタイヤ（２５ｆ）（２５ｒ）の各個を経て、その真下位置の転動ローラー（２６）へ直かに伝わるため、その揚力をロードセル（２８）により正しく測定・評価することができる。 During such a wind tunnel experiment, the load of the vehicle to be measured (M) is carried by the rolling roller (26) as a whole including that of the tires (25f) and (25r). The tire (25f) (25r) rotates on the upper surface of the belt (15) following the rotational movement, and the rolling roller (26) also rolls on the lower surface (back surface) of the belt (15). The lift generated in the process is directly transmitted to the rolling roller (26) directly below the tire (25f) (25r), so that the lift is correctly measured by the load cell (28). Can be evaluated.
しかも、上記転動ローラー（２６）とロードセル（２８）はタイヤ（２５ｆ）（２５ｒ）毎の個別に対応設置されているため、その測定値を図外のコンピューターにより演算すれば、被測定車両（Ｍ）のピッチングモーメントやローリングモーメントも求めることができることになる。 Moreover, since the rolling roller (26) and the load cell (28) are individually installed for each tire (25f) (25r), if the measured value is calculated by a computer outside the figure, the vehicle to be measured ( The pitching moment and rolling moment of M) can also be obtained.
又、被測定車両（Ｍ）の横力と抗力は車体（３４）の両側面又はタイヤ（２５ｆ）（２５ｒ）を支持するサイドワイヤー（３５）の支持点に設置された測定用サイドポスト（３６）によって測定・評価することができ、これも左右一対の個別に存在するため、そのサイドポスト（３６）での測定値をやはりコンピューターにより演算して、被測定車両（Ｍ）のヨーイングモーメントも求め得るのである。 Further, the lateral force and the drag of the vehicle to be measured (M) are measured on the side posts (36) installed on the both sides of the vehicle body (34) or on the support points of the side wires (35) that support the tires (25f) (25r). ), And there is also a pair of left and right separately, so the measured value at the side post (36) is also calculated by the computer, and the yawing moment of the measured vehicle (M) is also obtained. To get.
（１０）・送風口
（１１）・吸入口
（１２）・天井面
（１３）・駆動ローラー
（１４）・従動ローラー
（１５）・ムービングベルト
（１６）・ベルト駆動モーター
（１７）・伝動機構
（１８）・テンションローラー
（１９）・油圧シリンダー
（２０）・蛇行検知センサー
（２１）・蛇行制御モーター
（２２）・固定天板
（２３）・吸着孔
（２４）・ベルト吸着チャンバー
（２５ｆ）・前輪タイヤ
（２５ｒ）・後輪タイヤ
（２６）・転動ローラー
（２７）・軸受ステー
（２８）・ロードセル
（２９）（３０）・取付盤
（３１）・スライドガイドレール
（３２）・ボールネジ
（３３）・サーボモーター
（３４）・車体
（３５）・サイド支持ワイヤー
（３６）・サイドポスト
（Ｂ）・ムービングベルト機構
（Ｍ）・被測定車両
（Ｆ）・架台
（Ｓ）・空間
(10) ・ Blower port (11) ・ Suction port (12) ・ Ceiling surface (13) ・ Drive roller (14) ・ Drive roller (15) ・ Moving belt (16) ・ Belt drive motor (17) ・ Transmission mechanism ( 18) ・ Tension roller (19) ・ Hydraulic cylinder (20) ・ Meander detection sensor (21) ・ Meander control motor (22) ・ Fixing top plate (23) ・ Suction hole (24) ・ Belt suction chamber (25f) ・ Front wheel Tire (25r), Rear tire (26), Rolling roller (27), Bearing stay (28), Load cell (29) (30), Mounting board (31), Slide guide rail (32), Ball screw (33)・ Servo motor (34) ・ Car body (35) ・ Side support wire (36) ・ Side post (B) ・ Moving belt mechanism (M) ・ Measuring vehicle F) · frame (S) · space
Claims (4)
上記ムービングベルト（１５）の回走運動に追従する転動ローラー（２６）と、その転動ローラー（２６）を介して被測定車両（Ｍ）の全体荷重を受けるロードセル（２８）とを、その被測定車両（Ｍ）のタイヤ（２５ｆ）（２５ｒ）と対応位置する複数づつとして上記ベルト（１５）の下方へ配設し、
上記被測定車両（Ｍ）の車体（３４）のみならず、タイヤ（２５ｆ）（２５ｒ）から発生する揚力をもムービングベルト（１５）の下方から上記ロードセル（２８）によって測定できるように定めたことを特徴とする風洞実験装置。 A moving belt (15) installed between the air blowing port (10) and the suction port (11) is driven to rotate and acts on the vehicle to be measured (M) on the belt (15) serving as a simulated moving road surface. In a wind tunnel experiment device that measures the aerodynamic force
A rolling roller (26) that follows the rotational movement of the moving belt (15), and a load cell (28) that receives the entire load of the vehicle to be measured (M) via the rolling roller (26), A plurality of tires (25f) and (25r) corresponding to the measured vehicle (M) are disposed below the belt (15),
Not only the vehicle body (34) of the vehicle to be measured (M) but also the lift generated from the tires (25f) (25r) can be measured by the load cell (28) from below the moving belt (15). Wind tunnel test equipment characterized by
上記固定天板（２２）とベルト吸着チャンバー（２４）が被測定車両（Ｍ）のタイヤ（２５ｆ）（２５ｒ）と対応位置する４個所において切り欠かれた空間（Ｓ）へ、上記ベルト（１５）の回走運動に追従する転動ローラー（２６）の各個を臨ませたことを特徴とする請求項１記載の風洞実験装置。 The lower surface of the moving belt (15) is supported by a fixed top plate (22) in which a large number of belt suction holes (23) are distributed and a belt suction chamber (24) that sucks air into the belt suction holes (23).
The belt (15) is cut into four spaces (S) where the fixed top plate (22) and the belt adsorption chamber (24) are cut out at four positions corresponding to the tires (25f) and (25r) of the vehicle to be measured (M). The wind tunnel experimental device according to claim 1, wherein each of the rolling rollers (26) following the revolving motion of (1) is allowed to face.
その各取付盤（２９）（３０）を被測定車両（Ｍ）におけるホイールベースの変化に応じて、前後方向へ位置調整できるように定めたことを特徴とする請求項１又は２記載の風洞実験装置。 A pair of left and right load cells (28) positioned corresponding to the front tire (25f) of the vehicle to be measured (M) and a pair of left and right load cells (28) positioned corresponding to the rear wheel tire (25r) are mounted separately. While fixed to the panels (29) and (30),
The wind tunnel experiment according to claim 1 or 2, characterized in that each of the mounting plates (29) (30) is determined so that the position of the mounting plate (29) can be adjusted in the front-rear direction in accordance with the change of the wheel base in the vehicle to be measured (M). apparatus.
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