JP6934599B2 - Thrust measuring device and thrust measuring method using it - Google Patents

Thrust measuring device and thrust measuring method using it Download PDF

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JP6934599B2
JP6934599B2 JP2017229827A JP2017229827A JP6934599B2 JP 6934599 B2 JP6934599 B2 JP 6934599B2 JP 2017229827 A JP2017229827 A JP 2017229827A JP 2017229827 A JP2017229827 A JP 2017229827A JP 6934599 B2 JP6934599 B2 JP 6934599B2
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pedestal
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利裕 古岡
利裕 古岡
将 村山
将 村山
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、軸流送風機やジェットエンジン等の推力測定方法に関するものである。 The present invention relates to a method for measuring thrust of an axial blower, a jet engine, or the like.

従来、この種の測定装置は、例えば、特許文献１のようなものが知られている。 Conventionally, a measuring device of this type is known, for example, as in Patent Document 1.

以下、その測定装置について図３を参照しながら説明する。 Hereinafter, the measuring device will be described with reference to FIG.

図３に示すように、図示しない設備の天井面などに固定された固定架台１０１に板ばね１０７を介して揺動架台１０３がつながれている。揺動架台１０３にはブラケット１０５が取り付けられており、固定架台１０２に取り付けられたロードセル１０４と接している。揺動架台１０３の下面には連結部材１０６、支持部材１０９を介してジェットエンジン１１０が取り付けられている。ジェットエンジン１１０を運転することによって発生する推力は支持部材１０８、揺動架台１０３、ブラケット１０５に伝播し、ロードセル１０４を押す。その力をロードセル１０４によって電気的に計測することで推力を測定することが出来る。 As shown in FIG. 3, a swinging pedestal 103 is connected to a fixed pedestal 101 fixed to a ceiling surface or the like of equipment (not shown) via a leaf spring 107. A bracket 105 is attached to the rocking pedestal 103, and is in contact with the load cell 104 attached to the fixed pedestal 102. A jet engine 110 is attached to the lower surface of the rocking gantry 103 via a connecting member 106 and a supporting member 109. The thrust generated by operating the jet engine 110 propagates to the support member 108, the swing mount 103, and the bracket 105, and pushes the load cell 104. The thrust can be measured by electrically measuring the force with the load cell 104.

特開平６−５０８４９号公報Japanese Unexamined Patent Publication No. 6-50849

このような従来の測定装置においては、測定装置全体が大きくなり、重量も重いものとなる。その重量を支えるために測定装置を支える設備全体や天井面は頑丈でなければならないという課題があった。また、推力測定時は図４の推力Ｆ０が発生することにより、揺動架台１０３は板ばね１０７の円弧上に沿って斜め上の方向に移動するため、揺動架台１０３が重力の作用によって元の位置に戻ろうとする力Ｆ４が発生する。これによりロードセル１０４の計測値は真の推力Ｆ０からＦ４の水平方向成分であるＦ２を引いた値Ｆ１となる。そのため、推力Ｆ０を求めるためにＦ１とＦ２を加算する必要がある。Ｆ２を算出するために板ばね１０７の長さと水平方向の移動量Ｘを正確に測定する必要があるという課題があった。
そこで本発明は、上記従来の課題を解決するものであり、簡易的な装置で精度よく推力の測定を行うことができる装置を提供することを目的とする。 In such a conventional measuring device, the entire measuring device becomes large and heavy. In order to support the weight, there is a problem that the entire equipment supporting the measuring device and the ceiling surface must be sturdy. Further, when the thrust is measured, the thrust F 0 in FIG. 4 is generated, so that the swing pedestal 103 moves diagonally upward along the arc of the leaf spring 107, so that the swing pedestal 103 is affected by the action of gravity. force F 4 of returning to the original position is generated. As a result, the measured value of the load cell 104 becomes the value F 1 obtained by subtracting F 2 which is the horizontal component of F 4 from the true thrust F 0. Therefore, it is necessary to add F 1 and F 2 in order to obtain the thrust F 0. There is a problem that it is necessary to accurately measure the length of the leaf spring 107 and the amount of movement X in the horizontal direction in order to calculate F 2.
Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an apparatus capable of accurately measuring thrust with a simple apparatus.

そして、この目的を達成するために、本発明は、
送風機を固定するための取付架台と、
前記取付架台の下側に位置する中間架台と、
前記中間架台の下側に位置するベース架台と、前記取付架台と前記中間架台との間に設けた第１の水平直進移動手段と、前記中間架台と前記ベース架台との間に設けられ、前記第１の水平直進移動手段の移動方向と平行に移動可能にした第２の水平直進移動手段と、前記中間架台を水平往復運動させるための駆動手段と、前記中間架台の往復運動の方向と平行でかつ、前記送風機の吹出し方向にかかる力を測定するために前記取付架台に接続された推力測定手段を備えたことを特徴とする推力測定装置としたものであり、これにより所期の目的を達成するものである。 And, in order to achieve this object, the present invention
A mounting stand for fixing the blower and
An intermediate pedestal located below the mounting pedestal,
A base pedestal located below the intermediate pedestal, a first horizontal straight-moving means provided between the mounting pedestal and the intermediate pedestal, and provided between the intermediate pedestal and the base pedestal, said. A second horizontal straight-moving means that can move in parallel with the moving direction of the first horizontal straight-moving means, a driving means for horizontally reciprocating the intermediate pedestal, and parallel to the direction of the reciprocating movement of the intermediate pedestal. Moreover, the thrust measuring device is provided with a thrust measuring means connected to the mounting frame in order to measure the force applied in the blowing direction of the blower. It is something to achieve.

本発明によれば、装置全体を吊下げて支えるための設備が不要となり、推力を直接計測することが出来る。 According to the present invention, the equipment for suspending and supporting the entire device is not required, and the thrust can be directly measured.

本発明の実施の形態１の推力測定装置の構成を示す説明図Explanatory drawing which shows the structure of the thrust measuring apparatus of Embodiment 1 of this invention 本発明の実施の形態１の推力測定装置の構成を示す詳細図Detailed view showing the structure of the thrust measuring apparatus of Embodiment 1 of this invention. 従来の推力測定装置の構成を示す説明図Explanatory drawing which shows the structure of the conventional thrust measuring apparatus 従来の推力測定装置の構成を示す説明図Explanatory drawing which shows the structure of the conventional thrust measuring apparatus

本発明に係る推力測定装置は、送風機を固定するための取付架台と、
前記取付架台の下側に位置する中間架台と、
前記中間架台の下側に位置するベース架台と、前記取付架台と前記中間架台との間に設けた第１の水平直進移動手段と、前記中間架台と前記ベース架台との間に設けられ、前記第１の水平直進移動手段と平行に移動可能にした第２の水平直進移動手段と、前記中間架台を水平往復運動させるための駆動手段と、前記中間架台の往復運動の方向と平行でかつ、前記送風機の吹出し方向にかかる力を測定するために前記取付架台に接続された推力測定手段を備えたことを特徴としたものである。 The thrust measuring device according to the present invention includes a mounting base for fixing the blower and a mounting base.
An intermediate pedestal located below the mounting pedestal,
A base pedestal located below the intermediate pedestal, a first horizontal straight-moving means provided between the mounting pedestal and the intermediate pedestal, and provided between the intermediate pedestal and the base pedestal, said. A second horizontal straight-moving means that can move in parallel with the first horizontal straight-moving means, a driving means for horizontally reciprocating the intermediate gantry, and parallel to the direction of the reciprocating movement of the intermediate gantry and It is characterized in that it is provided with a thrust measuring means connected to the mounting base in order to measure the force applied in the blowing direction of the blower.

これにより、装置全体を吊下げて支えるための設備が不要となり、推力を直接計測することが出来る。 This eliminates the need for equipment to suspend and support the entire device, and can directly measure thrust.

以下、本発明の実施の形態について図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施の形態１）
図１は、本実施の形態の推力測定装置１の全体構成を示す説明図である。図２は、図１における中間架台の移動の状態を示す説明図である。 (Embodiment 1)
FIG. 1 is an explanatory diagram showing an overall configuration of the thrust measuring device 1 of the present embodiment. FIG. 2 is an explanatory diagram showing a state of movement of the intermediate gantry in FIG.

図１に示すように、本実施の形態による推力測定装置１は、被測定物である送風機２を乗せて固定するための取付架台３の下に中間架台４があり、その下にベース架台５がある構成となっている。送風機２は、一方向へ気流を発生させるものであって、例えば、円筒内に軸流送風機を配したジェットファンである。 As shown in FIG. 1, the thrust measuring device 1 according to the present embodiment has an intermediate pedestal 4 under a mounting pedestal 3 for mounting and fixing a blower 2 as an object to be measured, and a base pedestal 5 under the mounting pedestal 3. There is a configuration. The blower 2 is for generating an air flow in one direction, and is, for example, a jet fan in which an axial blower is arranged in a cylinder.

取付架台３の下面には車輪６が備わっており、それに対応するように中間架台４の上面にレール７が備わっている。この取付架台３の車輪６と中間架台４のレール７によって第１の水平直進移動手段が構成されている。同様に中間架台４の下面にも車輪６が備わっており、それに対応するようにベース架台５の上面にレール７が備わっている。この中間架台４の車輪６とベース架台５のレール７によって第２の水平直進移動手段が構成されている。取付架台３には連結ワイヤ１０を介してロードセル９が接続されており、ロードセル９の反対側にはベース架台５から延長された金具と接続されている。ロードセル９は、引張り力または圧縮力を電気信号に変えて測定するものである。本説明ではロードセル９の一端を固定して他端が引張られることによりその力を測定する。中間架台４には空圧シリンダ８が接続されており、空圧シリンダ８の反対側にはベース架台５から延長された金具と接続されている。 Wheels 6 are provided on the lower surface of the mounting base 3, and rails 7 are provided on the upper surface of the intermediate base 4 so as to correspond to the wheels 6. The wheels 6 of the mounting base 3 and the rails 7 of the intermediate base 4 constitute the first horizontal straight-moving means. Similarly, the wheels 6 are provided on the lower surface of the intermediate pedestal 4, and the rails 7 are provided on the upper surface of the base pedestal 5 so as to correspond to the wheels 6. The wheels 6 of the intermediate gantry 4 and the rails 7 of the base gantry 5 form a second horizontal straight-moving means. A load cell 9 is connected to the mounting base 3 via a connecting wire 10, and a metal fitting extended from the base base 5 is connected to the opposite side of the load cell 9. The load cell 9 measures by converting a tensile force or a compressive force into an electric signal. In this description, one end of the load cell 9 is fixed and the other end is pulled to measure the force. A pneumatic cylinder 8 is connected to the intermediate pedestal 4, and a metal fitting extended from the base pedestal 5 is connected to the opposite side of the pneumatic cylinder 8.

取付架台３の可動方向と中間架台４の可動方向とは同一方向になるように、中間架台４、ベース架台５に設けられたレール７は平行になっている。また、送風機２は、吹出し風１１の吹き出し方向とレール７の長手方向とが平行になるように固定される。 The rails 7 provided on the intermediate pedestal 4 and the base pedestal 5 are parallel so that the movable direction of the mounting pedestal 3 and the movable direction of the intermediate pedestal 4 are in the same direction. Further, the blower 2 is fixed so that the blowing direction of the blowing wind 11 and the longitudinal direction of the rail 7 are parallel to each other.

送風機２を運転すると、吹出し風１１が送風機２から吹出され、その反力として吹出し方向と逆の方向に推力１３が発生する。本実施の形態では、送風機２の駆動による推力１３は、ロードセル９に対して引張り力加えるように配置されている。ロードセル９が圧縮力を測定する場合には、送風機２の吹き出し方向を反対にするとよい。送風機２を乗せた取付架台３は連結ワイヤ１０を介してロードセル９と接続されているため、推力１３の発生方向に移動することはなく、結果的に取付架台３が移動しようとする力をロードセル９で測定することができる。ただし、この状態では、取付架台３と中間架台４とは静止しており、このときロードセル９が測定した値には取付架台３と中間架台４との間で発生する静摩擦の成分が含まれている。静摩擦は摩擦面が静止しているときに発生するもので、その値を正確に測定することは原理的に困難である。そこで、空圧シリンダ８を駆動させてロードセル９にかかる引張り力を測定することによって、推力１３を算出する。 When the blower 2 is operated, the blown wind 11 is blown out from the blower 2, and a thrust 13 is generated as a reaction force in the direction opposite to the blowing direction. In the present embodiment, the thrust 13 driven by the blower 2 is arranged so as to apply a tensile force to the load cell 9. When the load cell 9 measures the compressive force, the blowing direction of the blower 2 may be reversed. Since the mounting base 3 on which the blower 2 is mounted is connected to the load cell 9 via the connecting wire 10, the mounting base 3 does not move in the direction in which the thrust 13 is generated, and as a result, the force that the mounting base 3 tries to move is applied to the load cell. It can be measured at 9. However, in this state, the mounting pedestal 3 and the intermediate pedestal 4 are stationary, and the value measured by the load cell 9 at this time includes a component of static friction generated between the mounting pedestal 3 and the intermediate pedestal 4. There is. Static friction occurs when the friction surface is stationary, and it is difficult in principle to accurately measure its value. Therefore, the thrust 13 is calculated by driving the pneumatic cylinder 8 and measuring the tensile force applied to the load cell 9.

すなわち、送風機２を運転した状態で空圧シリンダ８を駆動させて中間架台４を図１の中間架台移動方向１２の方向に移動させると、取付架台３と中間架台４との間に発生する摩擦は動摩擦となる。動摩擦は静摩擦に比べて値が小さく、摩擦面の条件が均一であれば動作中の値は一定であるという特性がある。このときにロードセル９が測定する引張り力の値は（推力１３−動摩擦力）（＝Ｆａとする）となる。中間架台４が動作端まで達したら空圧シリンダ８を逆方向に駆動させると中間架台４は図２における中間架台移動方向１４の方向に移動する。このときにロードセル９が測定する引張り力の値は（推力１３＋動摩擦力）（＝Ｆｂとする）となる。空圧シリンダ８の駆動により、中間架台４を推力と同じ方向に動かすことと、推力と反対方向に動かすことを連続的に行うことによって、中間架台４は往復運動をすることになる。中間架台４が連続往復運動を行っているときにロードセル９によって連続的に測定を行うと、その測定値はＦａ（推力１３−動摩擦力）とＦｂ（推力１３＋動摩擦力）の値を繰り返すことになる。すなわち、動摩擦力が相殺されて推力１３のみの値を知ることができ、求める推力１３はＦａとＦｂの和の１／２である。実際の測定においては、往復運動を繰り返し、Ｆａ，Ｆｂの測定を複数回行い、これを平均化するとよい。 That is, when the pneumatic cylinder 8 is driven to move the intermediate pedestal 4 in the direction of the intermediate pedestal moving direction 12 in FIG. 1 while the blower 2 is operating, the friction generated between the mounting pedestal 3 and the intermediate pedestal 4 is generated. Becomes dynamic friction. The value of dynamic friction is smaller than that of static friction, and if the conditions of the friction surface are uniform, the value during operation is constant. At this time, the value of the tensile force measured by the load cell 9 is (thrust 13-dynamic friction force) (= Fa). When the intermediate pedestal 4 reaches the operating end, the pneumatic cylinder 8 is driven in the opposite direction, and the intermediate pedestal 4 moves in the direction of the intermediate pedestal moving direction 14 in FIG. At this time, the value of the tensile force measured by the load cell 9 is (thrust 13 + dynamic friction force) (= Fb). By driving the pneumatic cylinder 8, the intermediate gantry 4 is reciprocated by continuously moving the intermediate gantry 4 in the same direction as the thrust and in the direction opposite to the thrust. When continuous measurement is performed by the load cell 9 while the intermediate gantry 4 is performing continuous reciprocating motion, the measured values repeat the values of Fa (thrust 13-dynamic friction force) and Fb (thrust 13 + dynamic friction force). Become. That is, the dynamic friction force is offset and the value of only the thrust 13 can be known, and the desired thrust 13 is 1/2 of the sum of Fa and Fb. In the actual measurement, it is advisable to repeat the reciprocating motion, measure Fa and Fb a plurality of times, and average them.

本発明にかかる推力測定装置は、道路トンネル用の送風機だけでなく、取付架台に乗せることが可能で一方向に推力を発生するものであればどのようなものでも測定することができる。 The thrust measuring device according to the present invention can measure not only a blower for a road tunnel but also any one that can be mounted on a mounting base and generates thrust in one direction.

１ 推力測定装置
２ 送風機
３ 取付架台
４ 中間架台
５ ベース架台
６ 車輪
７ レール
８ 空圧シリンダ
９ ロードセル
１０ 連結ワイヤ
１１ 吹出し風
１２ 中間架台移動方向
１３ 推力
１４ 中間架台移動方向 1 Thrust measuring device 2 Blower 3 Mounting pedestal 4 Intermediate pedestal 5 Base pedestal 6 Wheels 7 Rail 8 Pneumatic cylinder 9 Load cell 10 Connecting wire 11 Blow-out wind 12 Intermediate pedestal moving direction 13 Thrust 14 Intermediate pedestal moving direction

Claims (2)

送風機を固定するための取付架台と、
前記取付架台の下側に位置する中間架台と、
前記中間架台の下側に位置するベース架台と、
前記取付架台と前記中間架台との間に設けた第１の水平直進移動手段と、
前記中間架台と前記ベース架台との間に設けられ、前記第１の水平直進移動手段の移動方向と平行に移動可能にした第２の水平直進移動手段と、
前記中間架台を水平往復運動させるための駆動手段と、
前記中間架台の往復運動の方向と平行でかつ、前記送風機の吹出し方向にかかる力を測定するために前記取付架台に接続された推力測定手段を備えたことを特徴とする推力測定装置。 A mounting stand for fixing the blower and
An intermediate pedestal located below the mounting pedestal,
The base pedestal located below the intermediate pedestal and
A first horizontal straight moving means provided between the mounting frame and the intermediate frame, and
A second horizontal straight-moving means provided between the intermediate pedestal and the base pedestal and capable of moving in parallel with the moving direction of the first horizontal straight-moving means, and a second horizontal straight-moving means.
A driving means for horizontally reciprocating the intermediate frame and
A thrust measuring device comprising a thrust measuring means connected to the mounting pedestal in order to measure a force applied in the blowing direction of the blower while being parallel to the direction of the reciprocating motion of the intermediate pedestal. 請求項１記載の推力測定装置を用いた推力測定方法であって、
測定対象となる前記送風機を測定対象の運転条件で運転させ、
前記駆動手段によって前記中間架台を一方向に移動させるときに前記推力測定手段で検出される力と、前記駆動手段によって前記中間架台を前記一方向とは反対方向に移動させるときに前記推力測定手段で検出される力とを用いて推力を算出する推力測定方法。 A thrust measuring method using the thrust measuring device according to claim 1.
Operate the blower to be measured under the operating conditions to be measured.
The force detected by the thrust measuring means when the intermediate gantry is moved in one direction by the driving means, and the thrust measuring means when the intermediate gantry is moved in the direction opposite to the one direction by the driving means. A thrust measurement method that calculates thrust using the force detected in.
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