JPH06313711A - Apparatus for monitoring deflection of open type blade of rotary machine - Google Patents

Apparatus for monitoring deflection of open type blade of rotary machine

Info

Publication number
JPH06313711A
JPH06313711A JP12525193A JP12525193A JPH06313711A JP H06313711 A JPH06313711 A JP H06313711A JP 12525193 A JP12525193 A JP 12525193A JP 12525193 A JP12525193 A JP 12525193A JP H06313711 A JPH06313711 A JP H06313711A
Authority
JP
Japan
Prior art keywords
type blade
open
gap sensor
rotary machine
open type
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
Application number
JP12525193A
Other languages
Japanese (ja)
Other versions
JP2596885B2 (en
Inventor
Tsuneya Sugitani
恒也 杉谷
Takeshi Sugimoto
剛 杉本
Yutaka Masujima
裕 増島
Osamu Koda
理 香田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DENGIYOUSHIYA KIKAI SEISAKUSHO KK
KASEN PUMP SHISETSU GIJUTSU KY
KASEN PUMP SHISETSU GIJUTSU KYOKAI
Dengyosha Machine Works Ltd
Original Assignee
DENGIYOUSHIYA KIKAI SEISAKUSHO KK
KASEN PUMP SHISETSU GIJUTSU KY
KASEN PUMP SHISETSU GIJUTSU KYOKAI
Dengyosha Machine Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DENGIYOUSHIYA KIKAI SEISAKUSHO KK, KASEN PUMP SHISETSU GIJUTSU KY, KASEN PUMP SHISETSU GIJUTSU KYOKAI, Dengyosha Machine Works Ltd filed Critical DENGIYOUSHIYA KIKAI SEISAKUSHO KK
Priority to JP5125251A priority Critical patent/JP2596885B2/en
Publication of JPH06313711A publication Critical patent/JPH06313711A/en
Application granted granted Critical
Publication of JP2596885B2 publication Critical patent/JP2596885B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To measure and monitor the deflection value of an open type blade of a rotary machine in operation. CONSTITUTION:A gap sensor 12 is arranged at a position in proximity to a rotating surface of an open type blade 10 being directed to the open type blade 10. An output signal of the gap sensor 12 is converted to digital from analog by an A/D conversion means 16 and the results are smoothed and differentiated by a smoothing/differentiating means 20 to compare a plurality of data sampled before and after the resulting differentiated value is down to zero by a comparison means so that the data at the peak value is specified. The maximum and minimum values are specified by a maximum/minimum specifying means 28 among waveforms of output signals to be outputted from the gap sensor 12 while the open type blade 10 makes a turn. Moreover, the difference between the values is computed by a difference computing means 30 and is shown by a display means 24 as deflection value of the open type blade 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、回転機械の開放型羽根
の振れを運転状態において監視する回転機械の開放型羽
根の振れ監視装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open type blade runout monitoring device for a rotary machine, which monitors runout of an open type blade of a rotary machine in an operating state.

【0002】[0002]

【従来の技術】従来の回転機械にあっては、軸受ハウジ
ング部に振動センサを付設し、振動振幅や振動速度およ
び振動加速度等の大きさから、回転機械の状態の良否が
推測判定されている。または、回転軸に近接させて軸と
直交する面内で相対的な直角2方向に2個のギャップセ
ンサを設け、回転軸とギャップセンサの間の距離の変化
から回転機械の状態の良否が推測されている。
2. Description of the Related Art In a conventional rotary machine, a vibration sensor is attached to a bearing housing, and the state of the rotary machine is presumably judged from the magnitude of vibration amplitude, vibration velocity, vibration acceleration, and the like. . Alternatively, two gap sensors are provided close to the rotation axis and in two directions at right angles relative to each other in a plane orthogonal to the rotation axis, and the quality of the rotating machine is estimated from the change in the distance between the rotation axis and the gap sensor. Has been done.

【0003】[0003]

【発明が解決しようとする課題】上述のごとき従来の回
転機械の状態の良否の判定方法にあっては、回転機械の
内部で生ずる流体力学的または機械的原因による回転体
の挙動を外部でとらえようとするものであり、異常振動
が発生したときにその原因究明は推定の域を出ない。そ
して、立軸ポンプ等のごとく回転機械自体は床下の水中
にあり、床上部分にある回転軸から振動の検出がなされ
る場合には、立軸ポンプの据え付け状態により異なった
振動が生じ、しかも床によって振動が減衰されるなどに
より、原因究明は困難である。
In the conventional method for judging the quality of the rotating machine as described above, the behavior of the rotating body due to the hydrodynamic or mechanical cause generated inside the rotating machine is externally detected. When abnormal vibration occurs, the cause of it cannot be estimated. When a rotary machine such as a vertical shaft pump is in the water under the floor, and vibration is detected from the rotary shaft on the floor, different vibrations occur depending on the installation state of the vertical shaft pump, and moreover, vibrations occur depending on the floor. It is difficult to find out the cause, because it is attenuated.

【0004】本発明は、上述のごとき事情に鑑みてなさ
れたもので、運転状態で開放型羽根の振れ量を直接的に
測定するようにした回転機械の開放型羽根の振れ監視装
置を提供することを目的とする。
The present invention has been made in view of the above-mentioned circumstances, and provides an open type blade runout monitoring device for a rotary machine, which directly measures the runout amount of the open type blade in an operating state. The purpose is to

【0005】[0005]

【課題を解決するための手段】かかる目的を達成するた
めに、本発明の回転機械の開放型羽根の振れ監視装置
は、回転機械の開放型羽根の回転面に近接した位置で前
記開放型羽根に向けて配設したギャップセンサと、この
ギャップセンサの前を前記開放型羽根が通過する際に前
記ギャップセンサから出力される出力信号の各波形のピ
ーク値を検出するピーク値検出手段と、前記開放型羽根
が1回転する間の前記出力信号のピーク値の最大値と最
小値の差を算出する振れ量演算手段と、を備えて構成さ
れる。
In order to achieve the above object, the open type blade run-out monitoring apparatus for a rotary machine according to the present invention is provided with the open type blade at a position close to the rotating surface of the open type blade of the rotary machine. And a peak value detecting means for detecting a peak value of each waveform of an output signal output from the gap sensor when the open type blade passes in front of the gap sensor, And a shake amount calculating means for calculating a difference between the maximum value and the minimum value of the peak value of the output signal during one rotation of the open blade.

【0006】そして、前記ピーク値検出手段を、前記ギ
ャップセンサから出力される出力信号の波形をサンプリ
ングならびにA/D変換するA/D変換手段と、このA
/D変換手段から出力される離散量データを平滑化微分
する平滑化微分手段と、この平滑化微分値が零となる離
散量データを中心としてその前後でサンプリングされた
複数個の離散量データの大きさを比較して各波形におけ
るピーク値を特定する比較手段と、を備えて構成しても
良い。
And, the peak value detecting means is an A / D converting means for sampling and A / D converting the waveform of the output signal outputted from the gap sensor, and the A / D converting means.
Smoothing differentiating means for smoothing and differentiating the discrete quantity data output from the / D converting means, and a plurality of discrete quantity data sampled before and after the discrete quantity data whose smoothing differential value is zero. It may be configured by including a comparison unit that compares the magnitudes and specifies the peak value in each waveform.

【0007】また、前記ギャップセンサの前を前記開放
型羽根が通過する際に前記ギャップセンサから出力され
る出力信号の波形のピーク値の大きさより低いしきい値
を設定し、このしきい値より低い信号に対して前記ピー
ク値検出手段が動作しないように制御する動作制御手段
を備えて構成することもできる。
Further, a threshold value lower than the magnitude of the peak value of the waveform of the output signal output from the gap sensor when the open type blade passes in front of the gap sensor is set. An operation control means for controlling the peak value detection means so as not to operate with respect to a low signal may be provided.

【0008】さらに、前記ギャップセンサを羽根車のケ
ーシングに配設し、前記ギャップセンサの前記開放型羽
根に対向する感受面を非磁性体のセラミックスで覆って
構成することもできる。
Further, the gap sensor may be arranged in a casing of an impeller, and the sensing surface of the gap sensor facing the open blade may be covered with a non-magnetic ceramic material.

【0009】[0009]

【作 用】請求項1記載の回転機械の開放型羽根の振れ
監視装置にあっては、ギャップセンサから出力される出
力信号の波形のピーク値の大小の差により、開放型羽根
とギャップセンサの間のギャップの変化、すなわち開放
型羽根の振れ量が直接的に検出し得る。
According to another aspect of the present invention, in the open-type blade runout monitoring apparatus for a rotary machine according to claim 1, the open-type blade and the gap sensor are separated from each other due to a difference in peak value of a waveform of an output signal output from the gap sensor. The change in the gap between them, that is, the amount of swing of the open blade can be directly detected.

【0010】そして、請求項2記載の回転機械の開放型
羽根の振れ監視装置にあっては、出力信号がA/D変換
された離散量データに対して平滑化微分を行なうこと
で、出力信号の波形のピーク値を容易にディジタル処理
によって検出し得る。
According to another aspect of the present invention, there is provided an open-type blade shake monitoring apparatus for a rotary machine, wherein the output signal is smoothed and differentiated by performing A / D conversion on the discrete quantity data. The peak value of the waveform of can be easily detected by digital processing.

【0011】また、請求項3記載の回転機械の開放型羽
根の振れ監視装置にあっては、しきい値より低いレベル
の雑音等に対してピーク値検出手段が動作しないので、
雑音の波形のピーク値が最小値として誤って検出される
ことがない。
In the open type blade runout monitoring apparatus for a rotary machine according to the third aspect of the invention, the peak value detecting means does not operate for noise or the like having a level lower than the threshold value.
The peak value of the noise waveform will not be erroneously detected as the minimum value.

【0012】さらに、請求項4記載の回転機械の開放型
羽根の振れ監視装置にあっては、ギャップセンサの開放
型羽根に対向する感受面を非磁性体のセラミックスで覆
うので、覆うことによりギャップセンサからの出力信号
に影響を与えることなく、ギャップセンサの感受面を流
体による摩耗から保護し得る。
Further, in the shake monitoring apparatus for open type blades of a rotary machine according to a fourth aspect, since the sensing surface of the gap sensor facing the open type blades is covered with a non-magnetic ceramic, the gap is covered by covering. The sensitive surface of the gap sensor can be protected from wear by the fluid without affecting the output signal from the sensor.

【0013】[0013]

【実施例】以下、本発明の一実施例を図1ないし図5を
参照して説明する。図1は、本発明の回転機械の開放型
羽根の振れ監視装置の一実施例のブロック回路図であ
り、図2は、ギャップセンサの出力信号の波形図であ
り、図3(a)は、図2の波形の離散量データによる波
形図であり、図3(b)は、(a)の離散量データを平
滑化微分した微分値の波形図であり、図4は、本発明の
回転機械の開放型羽根の振れ監視装置の動作を説明する
フローチャートであり、図5は、ギャップセンサの感受
面をセラミックスで覆った要部断面図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block circuit diagram of an embodiment of an open-type blade shake monitoring device for a rotary machine according to the present invention, FIG. 2 is a waveform diagram of an output signal of a gap sensor, and FIG. FIG. 3 is a waveform diagram based on the discrete amount data of the waveform of FIG. 2, FIG. 3B is a waveform diagram of differential values obtained by smoothing and differentiating the discrete amount data of FIG. 3A, and FIG. FIG. 5 is a flowchart for explaining the operation of the open-type blade shake monitoring apparatus of FIG. 5, and FIG. 5 is a cross-sectional view of essential parts in which the sensing surface of the gap sensor is covered with ceramics.

【0014】まず、図1において、立軸ポンプや斜流ポ
ンプ等の回転機械の開放型羽根10の回転面に僅かなギ
ャップg(例えば1mm)を設けてギャップセンサ12
が配設される。このギャップセンサ12の出力信号は、
増幅手段14で適宜に増幅されてA/D変換手段16に
与えられる。このA/D変換手段16において、出力信
号は適宜なサンプリング周期(例えば96μs)でサン
プリングされてA/D変換される。さらに、このA/D
変換されて得られた離散量データが、動作制御手段18
と平滑化微分手段20と比較手段22および表示手段2
4にそれぞれ与えられる。動作制御手段18にあって
は、ギャップセンサ12の前に開放型羽根10が通過す
る際に出力される通常の出力信号の波形のピーク値の大
きさより低いしきい値Vrefが与えられ、このしきい
値Vref以上のレベルのピーク値を有する波形が選択
される。そして、しきい値Vref以上のピーク値の波
形が選択されたときにその旨の信号が、平滑化微分手段
20に与えられる。平滑化微分手段20は、しきい値V
ref以上のピーク値を有する出力信号の図3(a)の
ごとき離散量データからなる波形を平滑化微分し、図3
(b)のごとくその微分値が零となる離散量データk
(0)を検出する。この微分値が零となる離散量データ
k(0)が比較手段22に与えられる。なお、動作制御
手段18からしきい値Vref以上の旨の信号がなけれ
ば、平滑化微分手段20は、出力信号の波形を平滑化微
分することがない。比較手段22は、微分値が零となる
離散量データk(0)の前後でサンプリングされた複数
個の離散量データ(例えばk(0)とこれの前と後に3
個ずつの計7個)の大きさを比較し、最も大きいものを
ピーク値の離散量データとする。図3の例にあっては、
離散量データk(−1)がピーク値である。このピーク
値の離散量データk(−1)がピーク値記憶手段26に
与えられ、開放型羽根10が1回転する間にギャップセ
ンサ12から出力される出力信号の全ての波形のピーク
値の離散量データが記憶される。さらに、最大最小特定
手段28により、ピーク値記憶手段26に記憶された開
放型羽根10が1回転する間のピーク値のなかで最大値
(図2のMAX)と最小値(図2のMIN)のピーク値
となる離散量データがそれぞれ特定される。そして、差
演算手段30により、ピーク値の最大値と最小値の差
(図2の△)が演算され、表示手段24に与えられる。
表示手段24により、ピーク値の最大値と最小値の差
(△)とともに、出力信号の波形が適宜に表示される。
First, in FIG. 1, the gap sensor 12 is provided by providing a slight gap g (for example, 1 mm) on the rotating surface of the open type blade 10 of a rotary machine such as a vertical shaft pump or a mixed flow pump.
Is provided. The output signal of this gap sensor 12 is
It is appropriately amplified by the amplifying means 14 and given to the A / D converting means 16. In this A / D conversion means 16, the output signal is sampled at an appropriate sampling period (for example, 96 μs) and A / D converted. Furthermore, this A / D
The discrete quantity data obtained by the conversion is the operation control means 18
, Smoothing differentiating means 20, comparing means 22, and displaying means 2
4 are given respectively. In the operation control means 18, a threshold value Vref lower than the magnitude of the peak value of the waveform of the normal output signal output when the open type blade 10 passes in front of the gap sensor 12, is given. A waveform having a peak value at a level equal to or higher than the threshold value Vref is selected. Then, when a waveform having a peak value equal to or higher than the threshold value Vref is selected, a signal to that effect is given to the smoothing differentiating means 20. The smoothing differentiating means 20 has a threshold value V
The output signal having a peak value of ref or more is subjected to smoothing differentiation of a waveform composed of discrete amount data as shown in FIG.
Discrete amount data k whose differential value is zero as in (b)
(0) is detected. Discrete amount data k (0) whose differential value is zero is given to the comparison means 22. If there is no signal from the operation control means 18 indicating that the threshold value is Vref or more, the smoothing differentiating means 20 does not perform smoothing differentiating on the waveform of the output signal. The comparison means 22 includes a plurality of discrete quantity data (for example, k (0) and three or more before and after the discrete quantity data k (0) sampled before and after the discrete quantity data k (0) having a differential value of zero.
The size is compared with each other (7 in total), and the largest one is used as the discrete amount data of the peak value. In the example of FIG. 3,
The discrete quantity data k (-1) is the peak value. The discrete amount data k (-1) of the peak value is given to the peak value storage means 26, and the discrete peak values of all the waveforms of the output signal output from the gap sensor 12 while the open type blade 10 makes one rotation. Quantity data is stored. Further, by the maximum / minimum specifying means 28, the maximum value (MAX in FIG. 2) and the minimum value (MIN in FIG. 2) among the peak values stored in the peak value storage means 26 during one rotation of the open blade 10. The discrete amount data that is the peak value of is specified. Then, the difference calculating means 30 calculates the difference between the maximum value and the minimum value of the peak values (Δ in FIG. 2) and gives it to the display means 24.
The display means 24 appropriately displays the waveform of the output signal together with the difference (Δ) between the maximum and minimum peak values.

【0015】上記A/D変換手段16と動作制御手段1
8と平滑化微分手段20と比較手段22とピーク値記憶
手段26と最大最小特定手段28および差演算手段30
は、コンピュータ32によりソフト的処理がなされる。
そして、A/D変換手段16と動作制御手段18と平滑
化微分手段20および比較手段22により、ピーク値検
出手段が形成され、ピーク値記憶手段26と最大最小特
定手段28および差演算手段30により、振れ量演算手
段が形成される。なお、A/D変換手段16は、コンピ
ュータ32の外部に設けられていても良い。
The A / D conversion means 16 and the operation control means 1
8, smoothing differentiating means 20, comparing means 22, peak value storing means 26, maximum / minimum specifying means 28, and difference calculating means 30.
Is processed by software by the computer 32.
Then, the A / D converting means 16, the operation controlling means 18, the smoothing differentiating means 20 and the comparing means 22 form a peak value detecting means, and the peak value storing means 26, the maximum / minimum specifying means 28 and the difference calculating means 30. A shake amount calculation means is formed. The A / D conversion means 16 may be provided outside the computer 32.

【0016】かかる構成において、以下本発明の回転機
械の開放型羽根の振れ監視装置の動作を図4を参照して
説明する。まず、ギャップセンサ12の出力信号をサン
プリングしてデータの取り込みがなされ(ステップ
)、さらにA/D変換されて離散量データが出力され
る(ステップ)。そして、この離散量データがしきい
値Vrefより大きいレベルにあるか否かが動作制御手
段18で判別され、大きいレベルの波形のみが選択され
る(ステップ)。このしきい値Vrefより低いレベ
ルであれば、それはギャップセンサ12の前を開放型羽
根10が通過することで出力された出力信号でなく、雑
音とみなされる。
The operation of the shake monitoring device for the open type blade of the rotary machine according to the present invention having the above structure will be described below with reference to FIG. First, the output signal of the gap sensor 12 is sampled to capture the data (step), and further A / D converted to output discrete amount data (step). Then, the operation control unit 18 determines whether or not this discrete amount data is at a level higher than the threshold value Vref, and only the waveform of a high level is selected (step). If the level is lower than the threshold value Vref, it is regarded as noise, not the output signal output by the open type blade 10 passing in front of the gap sensor 12.

【0017】そして、しきい値以上の大きさの離散量デ
ータからなる波形が平滑化微分手段20により平滑化微
分される(ステップ)。この平滑化微分にあっては、
図3(a)のごとく波形がピーク値の離散量データk
(−1)を挟んで対称でない場合は、図3(b)のごと
く、ピーク値以外の離散量データk(0)で微分値が零
となる場合がある。しかし、この微分値が零となる前後
の狭い範囲内でサンプリングされた離散量データがピー
ク値となることが知られている。そこで、比較手段22
で微分値が零となる離散量データk(0)とその前後の
3個ずつの計7個の離散量データk(−3)〜k(3)
の大きさを比較してそのうちの最大の離散量データk
(−1)をピーク値と特定し(ステップ)、このピー
ク値がピーク値記憶手段26に記憶される。このステッ
プ,,の処理が、開放型羽根10が1回転する間
にギャップセンサ12から出力される出力信号の全ての
波形につき行なわれるまで繰り返される。全ての波形処
理が終了すると(ステップ)、最大最小特定手段28
によりピーク値記憶手段26に記憶されたピーク値が読
み出され、そのうちの最大値(図2のMAX)と最小値
(図2のMIN)が特定される。さらに、この最大値
(MAX)と最小値(MIN)の差(図2の△)が差演
算手段30により演算される(ステップ)。そして、
この差(△)が開放型羽根10の振れ量として表示手段
24で表示され(ステップ)、動作が終了する。
Then, the smoothing and differentiating means 20 smoothes and differentiates the waveform consisting of the discrete quantity data having a size equal to or larger than the threshold value (step). In this smoothing derivative,
As shown in FIG. 3 (a), the waveform is a discrete quantity data k having a peak value.
When not symmetrical with respect to (-1), the differential value may be zero in the discrete amount data k (0) other than the peak value as shown in FIG. However, it is known that discrete amount data sampled within a narrow range before and after the differential value becomes zero has a peak value. Therefore, the comparison means 22
The discrete quantity data k (0) whose derivative value is zero and three discrete quantity data k (-3) to k (3) before and after the discrete quantity data k (0)
Of the maximum discrete quantity data k
(-1) is specified as a peak value (step), and this peak value is stored in the peak value storage means 26. The processing of these steps is repeated until all the waveforms of the output signal output from the gap sensor 12 during one rotation of the open type blade 10. When all the waveform processing is completed (step), the maximum / minimum specifying means 28
Thus, the peak value stored in the peak value storage means 26 is read, and the maximum value (MAX in FIG. 2) and the minimum value (MIN in FIG. 2) of them are specified. Further, the difference (Δ in FIG. 2) between the maximum value (MAX) and the minimum value (MIN) is calculated by the difference calculating means 30 (step). And
This difference (Δ) is displayed on the display means 24 as the shake amount of the open type blade 10 (step), and the operation is completed.

【0018】なお、開放型羽根10がギャップセンサ1
2の前を通過する間以外で、ギャップセンサ12から図
2に示すごとき雑音等が出力されないならば、図1から
動作制御手段18が省かれ、図4からステップが省か
れても良い。
The open type blade 10 is the gap sensor 1.
If noise or the like as shown in FIG. 2 is not output from the gap sensor 12 except during the passage in front of 2, the operation control means 18 may be omitted from FIG. 1 and the steps may be omitted from FIG.

【0019】さらに、本発明の回転機械の開放型羽根の
振れ監視装置にあっては、ギャップセンサ12の感受面
の流体による摩耗を防いでギャップgの維持を図るため
に、図5のごとく、ギャップセンサ12の感受面12a
が非磁性体のセラミックス40で覆われている。このセ
ラミックス40で感受面12aが覆われたギャップセン
サ12は、ケーシング42に穿設した孔に嵌合されて開
放型羽根10に臨むように配置される。また、ギャップ
センサ12は、リティナー44に収納され、ギャップセ
ンサ12とセラミックス40およびリティナー44が、
エポキシ樹脂46の充填により一体化される。さらに、
一体化されたリティナー44とケーシング42との間に
は、Oリング48が配設されて水密構造が形成される。
Furthermore, in the open type blade runout monitoring apparatus of the rotary machine of the present invention, as shown in FIG. 5, in order to prevent the wear of the sensing surface of the gap sensor 12 due to the fluid and maintain the gap g, Sensing surface 12a of the gap sensor 12
Are covered with non-magnetic ceramics 40. The gap sensor 12 whose sensing surface 12a is covered with the ceramics 40 is fitted in a hole formed in the casing 42 and arranged so as to face the open-type blade 10. Further, the gap sensor 12 is housed in the retainer 44, and the gap sensor 12, the ceramics 40 and the retainer 44 are
It is integrated by filling with the epoxy resin 46. further,
An O-ring 48 is arranged between the integrated retainer 44 and the casing 42 to form a watertight structure.

【0020】なお、上記実施例にあっては、コンピュー
タ32によりディジタル処理を行なうためにギャップセ
ンサ12の出力信号をA/D変換手段16によりA/D
変換しているが、アナログ処理できるならば、A/D変
換手段16が不用であることは勿論である。さらに、コ
ンピュータ32のソフト的処理に代えて、その一部また
は全部をハード的処理で行なっても良い。そしてさら
に、ギャップセンサ12は、オービット軌跡(リサージ
ュ図形)表示のために回転体に対して直交してまたは対
向する相対位置に設けられた2個のギャップセンサのい
ずれか一方を兼用させることもできる。
In the above embodiment, the output signal of the gap sensor 12 is A / D converted by the A / D conversion means 16 in order to be digitally processed by the computer 32.
Although conversion is performed, it is needless to say that the A / D conversion means 16 is unnecessary if analog processing can be performed. Further, instead of the software processing of the computer 32, part or all of the processing may be performed by hardware processing. Further, the gap sensor 12 can also be used as either one of the two gap sensors provided at a relative position orthogonal to or facing the rotating body for displaying the orbit locus (Lissajous figure). .

【0021】[0021]

【発明の効果】以上説明したように、本発明の回転機械
の開放型羽根の振れ監視装置は構成されているので、以
下のごとき格別な効果を奏する。
As described above, since the open-type blade shake monitoring device for a rotary machine of the present invention is configured, the following special effects are achieved.

【0022】請求項1記載の回転機械の開放型羽根の振
れ監視装置にあっては、開放型羽根とギャップセンサの
間に設けられたギャップの変化を直接的に検出するの
で、開放型羽根の振れ量を直接検出することができ、異
常振動等の原因究明が確実かつ容易である。
In the open type blade runout monitoring apparatus of the rotating machine according to the first aspect of the invention, since the change in the gap provided between the open type blade and the gap sensor is directly detected, the open type blade of the open type blade can be detected. The amount of shake can be detected directly, and the cause of abnormal vibration can be investigated reliably and easily.

【0023】そして、請求項2記載の回転機械の開放型
羽根の振れ監視装置にあっては、ギャップセンサの出力
信号をディジタル信号として処理するので、コンピュー
タ等により迅速に開放型羽根の振れ量を演算することが
でき、振れ状況をリアルタイムで監視することができ
る。
Further, in the open type blade runout monitoring apparatus for a rotary machine according to the second aspect, since the output signal of the gap sensor is processed as a digital signal, the open type blade runout amount can be promptly measured by a computer or the like. The calculation can be performed, and the shake condition can be monitored in real time.

【0024】また、請求項3記載の回転機械の開放型羽
根の振れ監視装置にあっては、ギャップセンサの出力信
号等に重畳される虞のある雑音が排除されるので、雑音
により振れ量が誤って演算されることがなく、本発明の
回転機械の開放型羽根の振れ監視装置の信頼性が向上す
る。
Further, in the shake monitoring apparatus for open type blades of a rotary machine according to a third aspect of the present invention, noise that may be superimposed on the output signal of the gap sensor or the like is eliminated, so that the shake amount is increased by the noise. The reliability of the open-type blade shake monitoring device of the rotating machine of the present invention is improved without being erroneously calculated.

【0025】さらに、請求項4記載の回転機械の開放型
羽根の振れ監視装置にあっては、ギャップセンサの感受
面がセラミックスで覆われているので、ギャップセンサ
が流体により摩耗することがなく、開放型羽根とギャッ
プセンサの間のギャップを一定に維持することができ、
それだけ開放型羽根の振れ量の測定精度が長年月維持す
ることができ、実用上きわめて有益である。
Further, in the shake monitoring apparatus for the open type blade of the rotary machine according to the fourth aspect, since the sensing surface of the gap sensor is covered with the ceramic, the gap sensor is not worn by the fluid. The gap between the open blade and the gap sensor can be kept constant,
The measurement accuracy of the runout of the open blade can be maintained for many years, which is extremely useful in practice.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の回転機械の開放型羽根の振れ監視装置
の一実施例のブロック回路図である。
FIG. 1 is a block circuit diagram of an embodiment of an open-type blade shake monitoring apparatus for a rotary machine according to the present invention.

【図2】ギャップセンサの出力信号の波形図である。FIG. 2 is a waveform diagram of an output signal of the gap sensor.

【図3】(a)は、図2の波形の離散量データによる波
形図であり、(b)は、(a)の離散量データを平滑化
微分した微分値の波形図である。
3A is a waveform diagram based on the discrete amount data of the waveform of FIG. 2, and FIG. 3B is a waveform diagram of a differential value obtained by smoothing and differentiating the discrete amount data of FIG.

【図4】本発明の回転機械の開放型羽根の振れ監視装置
の動作を説明するフローチャートである。
FIG. 4 is a flowchart illustrating the operation of the open-type blade shake monitoring apparatus for a rotary machine according to the present invention.

【図5】ギャップセンサの感受面をセラミックスで覆っ
た要部断面図である。
FIG. 5 is a cross-sectional view of an essential part in which the sensing surface of the gap sensor is covered with ceramics.

【符号の説明】[Explanation of symbols]

10 開放型羽根 12 ギャップセンサ 12a 感受面 16 A/D変換手段 18 動作制御手段 20 平滑化微分手段 22 比較手段 26 ピーク値記憶手段 28 最大最小特定手段 30 差演算手段 40 セラミックス DESCRIPTION OF SYMBOLS 10 Open type blade 12 Gap sensor 12a Sensing surface 16 A / D conversion means 18 Operation control means 20 Smoothing differentiation means 22 Comparison means 26 Peak value storage means 28 Maximum / minimum specification means 30 Difference calculation means 40 Ceramics

───────────────────────────────────────────────────── フロントページの続き (72)発明者 杉本 剛 静岡県三島市緑町10番24号 株式会社電業 社機械製作所三島事業所内 (72)発明者 増島 裕 静岡県三島市緑町10番24号 株式会社電業 社機械製作所三島事業所内 (72)発明者 香田 理 静岡県三島市緑町10番24号 株式会社電業 社機械製作所三島事業所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Go Sugimoto 10-24 Midoricho, Mishima City, Shizuoka Electric Machinery Works, Ltd. Mishima Plant (72) Inventor Yu Masushima 10-24 Midoricho, Mishima City, Shizuoka Company Denkisha Machinery Works Mishima Works (72) Inventor Rika Kada 10-24 Midoricho, Mishima City, Shizuoka Prefecture Denkisha Machine Works Mishima Works

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 回転機械の開放型羽根の回転面に近接し
た位置で前記開放型羽根に向けて配設したギャップセン
サと、このギャップセンサの前を前記開放型羽根が通過
する際に前記ギャップセンサから出力される出力信号の
各波形のピーク値を検出するピーク値検出手段と、前記
開放型羽根が1回転する間の前記出力信号のピーク値の
最大値と最小値の差を算出する振れ量演算手段と、を備
えて構成したことを特徴とする回転機械の開放型羽根の
振れ監視装置。
1. A gap sensor arranged toward the open type blade at a position close to a rotating surface of the open type blade of a rotary machine, and the gap when the open type blade passes in front of the gap sensor. Peak value detecting means for detecting the peak value of each waveform of the output signal output from the sensor, and a shake for calculating the difference between the maximum value and the minimum value of the peak value of the output signal during one rotation of the open type blade. An open-type blade runout monitoring apparatus for a rotary machine, comprising: a quantity calculation means.
【請求項2】 請求項1記載の回転機械の開放型羽根の
振れ監視装置において、前記ピーク値検出手段を、前記
ギャップセンサから出力される出力信号の波形をサンプ
リングならびにA/D変換するA/D変換手段と、この
A/D変換手段から出力される離散量データを平滑化微
分する平滑化微分手段と、この平滑化微分値が零となる
離散量データを中心としてその前後でサンプリングされ
た複数個の離散量データの大きさを比較して各波形にお
けるピーク値を特定する比較手段と、を備えて構成した
ことを特徴とする回転機械の開放型羽根の振れ監視装
置。
2. The open-type blade runout monitoring apparatus for a rotary machine according to claim 1, wherein the peak value detecting means samples and A / D converts the waveform of the output signal output from the gap sensor. D conversion means, smoothing differentiating means for smoothing and differentiating the discrete quantity data output from this A / D converting means, and discrete quantity data whose smoothing differential value is zero are sampled before and after the center. An open-type blade run-out monitoring device for a rotary machine, comprising: a comparison unit that compares the sizes of a plurality of discrete amount data and specifies a peak value in each waveform.
【請求項3】 請求項1または2記載の回転機械の開放
型羽根の振れ監視装置において、前記ギャップセンサの
前を前記開放型羽根が通過する際に前記ギャップセンサ
から出力される出力信号の波形のピーク値の大きさより
低いしきい値を設定し、このしきい値より低い信号に対
して前記ピーク値検出手段が動作しないように制御する
動作制御手段を備えて構成したことを特徴とする回転機
械の開放型羽根の振れ監視装置。
3. The swing monitor device for an open type blade of a rotary machine according to claim 1, wherein a waveform of an output signal output from the gap sensor when the open type blade passes in front of the gap sensor. A rotation threshold value which is lower than the magnitude of the peak value and is provided with operation control means for controlling so that the peak value detection means does not operate with respect to a signal lower than this threshold value. An open-type blade runout monitoring device for machines.
【請求項4】 請求項1ないし3記載のいずれかの回転
機械の開放型羽根の振れ監視装置において、前記ギャッ
プセンサを羽根車のケーシングに配設し、前記ギャップ
センサの前記開放型羽根に対向する感受面を非磁性体の
セラミックスで覆って構成したことを特徴とする回転機
械の開放型羽根の振れ監視装置。
4. The open-type blade runout monitoring apparatus for a rotary machine according to claim 1, wherein the gap sensor is arranged in a casing of an impeller and faces the open-type blade of the gap sensor. An open-type blade shake monitoring device for a rotary machine, characterized in that the sensing surface is covered with non-magnetic ceramics.
JP5125251A 1993-04-28 1993-04-28 Open-type blade run-out monitoring device for rotating machinery Expired - Fee Related JP2596885B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5125251A JP2596885B2 (en) 1993-04-28 1993-04-28 Open-type blade run-out monitoring device for rotating machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5125251A JP2596885B2 (en) 1993-04-28 1993-04-28 Open-type blade run-out monitoring device for rotating machinery

Publications (2)

Publication Number Publication Date
JPH06313711A true JPH06313711A (en) 1994-11-08
JP2596885B2 JP2596885B2 (en) 1997-04-02

Family

ID=14905499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5125251A Expired - Fee Related JP2596885B2 (en) 1993-04-28 1993-04-28 Open-type blade run-out monitoring device for rotating machinery

Country Status (1)

Country Link
JP (1) JP2596885B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016092945A1 (en) * 2014-12-09 2016-06-16 三菱重工業株式会社 Rotary machine state observation device, rotary machine, and rotary machine state observation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5164948A (en) * 1974-10-09 1976-06-04 Siemens Ag Sadochu no taabinhane no jidomusetsushokushikitakasasokuteihoho
JPS5610202A (en) * 1979-07-06 1981-02-02 Citizen Watch Co Ltd Automatic eccentricity measuring method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5164948A (en) * 1974-10-09 1976-06-04 Siemens Ag Sadochu no taabinhane no jidomusetsushokushikitakasasokuteihoho
JPS5610202A (en) * 1979-07-06 1981-02-02 Citizen Watch Co Ltd Automatic eccentricity measuring method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016092945A1 (en) * 2014-12-09 2016-06-16 三菱重工業株式会社 Rotary machine state observation device, rotary machine, and rotary machine state observation method
JP2016109621A (en) * 2014-12-09 2016-06-20 三菱重工業株式会社 Rotary machine state monitoring apparatus, rotary machine, and rotary machine state monitoring method
KR20170071589A (en) * 2014-12-09 2017-06-23 미츠비시 쥬고교 가부시키가이샤 Rotary machine state observation device, rotary machine, and rotary machine state observation method
CN107003212A (en) * 2014-12-09 2017-08-01 三菱重工业株式会社 The state monitoring method of the state monitoring apparatus of rotating machinery, rotating machinery and rotating machinery
CN107003212B (en) * 2014-12-09 2019-03-22 三菱重工业株式会社 The state monitoring method of the state monitoring apparatus of rotating machinery, rotating machinery and rotating machinery
US10648477B2 (en) 2014-12-09 2020-05-12 Mitsubishi Heavy Industries, Ltd. Rotary machine state observation device, rotary machine, and rotary machine state observation method

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Publication number Publication date
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