JP4869008B2 - Vibration diagnosis system for rotating machinery - Google Patents

Vibration diagnosis system for rotating machinery Download PDF

Info

Publication number
JP4869008B2
JP4869008B2 JP2006265560A JP2006265560A JP4869008B2 JP 4869008 B2 JP4869008 B2 JP 4869008B2 JP 2006265560 A JP2006265560 A JP 2006265560A JP 2006265560 A JP2006265560 A JP 2006265560A JP 4869008 B2 JP4869008 B2 JP 4869008B2
Authority
JP
Japan
Prior art keywords
signal
vibration
rotation
reference signal
rotation reference
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.)
Expired - Fee Related
Application number
JP2006265560A
Other languages
Japanese (ja)
Other versions
JP2008082967A (en
Inventor
健二 山口
秀則 小坂
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP2006265560A priority Critical patent/JP4869008B2/en
Publication of JP2008082967A publication Critical patent/JP2008082967A/en
Application granted granted Critical
Publication of JP4869008B2 publication Critical patent/JP4869008B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Description

本発明は、例えば発電用タービンや発電機等の回転機械の軸やケーシングの異常を診断する回転機械の振動診断システムに関する。   The present invention relates to a vibration diagnosis system for a rotating machine that diagnoses an abnormality in a shaft or casing of a rotating machine such as a power generation turbine or a generator.

火力発電所には、数百トンもの大重量のロータが高速度で回転する主タービン・発電機を始めとして数多くの回転機械が設置されている。   Thermal power plants are equipped with a large number of rotating machines, including a main turbine / generator that rotates a heavy rotor of several hundred tons at high speed.

このような回転機械において、特に高速度の回転機械では、運転中に発生する異常の多くは振動現象の変化として現れることが多く、また急激に進展して重大な事故に発展する危険性があることから、運転監視装置と異常時の保護・制御装置を備えている。   In such a rotating machine, especially in a high-speed rotating machine, many of the abnormalities that occur during operation often appear as changes in the vibration phenomenon, and there is a risk of sudden progress and a serious accident. Therefore, it is equipped with an operation monitoring device and a protection / control device for abnormal conditions.

特に、近年では、電力需要の多様化・効率的運用などから、頻繁な起動・停止、急激な負荷変動等の多用な運用が求められ、発電機器には、これまで以上にストレスがかかるとともに、機器設備の異常の徴候を早期に検知し、原因を分析して運用制限などの状態を速やかに修復できることが、より強く要請されるようになってきた。   In particular, in recent years, due to diversification of power demand and efficient operation, etc., frequent operation such as frequent start / stop and rapid load fluctuation is required, and power generation equipment is more stressed than before, There has been a strong demand for early detection of signs of abnormalities in equipment, analysis of the cause, and quick restoration of conditions such as operational restrictions.

このため、例えば、回転機械の軸振動診断に関しては、特許第２８５０９１７号公報に「回転機械の異常診断方法」が開示されている（例えば、特許文献１参照。）。   For this reason, for example, regarding shaft vibration diagnosis of a rotating machine, Japanese Patent No. 2850917 discloses a “rotating machine abnormality diagnosis method” (see, for example, Patent Document 1).

７図は、従来の回転機械の振動診断装置を、火力発電回転機械のタービン・発電機に適用した例を示している。   FIG. 7 shows an example in which a conventional vibration diagnosis device for a rotary machine is applied to a turbine / generator of a thermal power generation rotary machine.

同図において、タービン・発電機１は、発電機１ａ及びタービン２ａ乃至２ｃを備え、その各ロータ（回転体）及びロータを支える各回転軸受部には、回転軸振動を検出する振動検出器３ａ乃至３ｆが取付けられている。   In FIG. 1, a turbine / generator 1 includes a generator 1a and turbines 2a to 2c, and each rotor (rotary body) and each rotary bearing portion supporting the rotor have a vibration detector 3a for detecting rotation shaft vibration. Thru 3f are attached.

また、タービン・発電機１内には、図示しない回転機械の回転数を検出する回転計、各軸受部での振動位相角を検出するための基準となるパルスを発信する位相角基準信号発生器４が設置されている。   Further, in the turbine / generator 1, a tachometer for detecting the rotational speed of a rotating machine (not shown), and a phase angle reference signal generator for transmitting a pulse serving as a reference for detecting a vibration phase angle at each bearing portion. 4 is installed.

振動検出器３ａ乃至３ｆ、及び位相角基準信号発生器４からの信号は振動監視・診断装置７を介して、図示しない制御用計算機に送られて運転員の制御操作を支援する。   Signals from the vibration detectors 3a to 3f and the phase angle reference signal generator 4 are sent to a control computer (not shown) via the vibration monitoring / diagnosis device 7 to assist the operator in controlling the operation.

すなわち、振動監視・診断装置７では、振動検出器３ａ乃至３ｆ、及び位相角基準信号発生器４からの１回転基準信号に基づいて、ロータ及び各回転軸受部における振動状態を判断し、規定の信号レベル以上であると判定すると、警報信号またはタービントリップ信号を制御用計算機へ伝達する。
特許第２８１８１７２号公報 That is, the vibration monitoring / diagnosis device 7 determines the vibration state in the rotor and each rotary bearing portion based on the one rotation reference signal from the vibration detectors 3a to 3f and the phase angle reference signal generator 4, If it is determined that the signal level is greater than or equal to the signal level, an alarm signal or a turbine trip signal is transmitted to the control computer.
Japanese Patent No. 2818172

上述したような従来の回転機械の振動監視・診断装置においては、位相角基準信号発生器からの１回転基準信号は、この位相角基準信号発生器自身の故障や、位相角基準信号発生器から振動監視・診断装置との接続線の断線等によって欠損することが考えられる。   In the conventional rotating machine vibration monitoring / diagnostic apparatus as described above, one rotation reference signal from the phase angle reference signal generator is generated by the failure of the phase angle reference signal generator itself or from the phase angle reference signal generator. It may be lost due to disconnection of the connection line with the vibration monitoring / diagnostic device.

万が一このような事態となった場合には、全ての振動監視や振動診断の情報が得られなくなり、タービン・発電機の状態が監視できなくなる問題がある。   If this happens, there is a problem that all vibration monitoring and vibration diagnosis information cannot be obtained, and the state of the turbine / generator cannot be monitored.

そのため、位相角基準信号発生器からの１回転基準信号が欠損となった場合に備えて、位相角基準信号発生器に相当する補助の１回転検出器を設けたり、また、位相角基準信号発生器が破損した場合には、タービン・発電機を停止したりするなどの対策が採られているが、このような１回転基準信号の欠損時の対策は、設備の追加や発電停止を伴う問題がある。   Therefore, in preparation for the case where the one-turn reference signal from the phase angle reference signal generator is lost, an auxiliary one-turn detector corresponding to the phase angle reference signal generator is provided, or the phase angle reference signal is generated. Measures such as shutting down turbines / generators are taken in case of damage to equipment, but such countermeasures for loss of one-rotation reference signal are a problem that involves adding equipment or stopping power generation. There is.

本発明は上述した課題を解決するためになされたもので、回転機械の1回転基準信号が欠損しても、自動的に回転機械の１回転基準信号の代替となる信号を提供することのできる回転機械の振動診断システムを提供することを目的とする。   The present invention has been made to solve the above-described problems, and can automatically provide a signal that can substitute for the one-rotation reference signal of the rotating machine even if the one-rotation reference signal of the rotating machine is lost. An object of the present invention is to provide a vibration diagnosis system for a rotating machine.

上記目的を達成するために、本発明による回転機械の振動診断システムは、回転機械の運転に伴う振動を検出してこれを表す振動信号を生成する振動検出手段と、前記回転機械の１回転を検出してこれを表す１回転基準信号を生成する位相角基準信号発生手段と、前記振動検出手段の振動信号を所定の信号に波形整形し、前記回転機械の１回転信号を生成する波形整形手段と、前記１回転基準信号の有無を判定し、該１回転基準信号が無いと判定された時に前記波形成形手段から送出される前記１回転信号に切替える回転基準信号選択回路と、前記振動検出手段の振動信号と前記回転基準信号選択回路で選択された前記１回転基準信号または前記１回転信号とから前記回転機械の振動の異常を監視・診断する振動監視・診断装置とを備えることを特徴とする。   In order to achieve the above object, a vibration diagnosis system for a rotating machine according to the present invention includes vibration detecting means for detecting vibrations accompanying the operation of the rotating machine and generating a vibration signal representing the vibration, and one rotation of the rotating machine. Phase angle reference signal generating means for detecting and generating one rotation reference signal representing this, and waveform shaping means for shaping the vibration signal of the vibration detection means into a predetermined signal and generating one rotation signal of the rotating machine A rotation reference signal selection circuit that determines the presence or absence of the one rotation reference signal and switches to the one rotation signal sent from the waveform shaping means when it is determined that there is no one rotation reference signal; and the vibration detection means And a vibration monitoring / diagnosis device for monitoring / diagnosing abnormal vibrations of the rotating machine from the vibration signal of the rotation and the one rotation reference signal or the one rotation signal selected by the rotation reference signal selection circuit. The features.

以上説明したように、本発明によれば、位相角基準信号発生器からの回転機械の１回転基準信号が消失した場合、振動検出器からの１回転信号に自動的に切り替える回転基準信号選択回路を備えたので、何らかの原因によって１回転基準信号が消失しても回転機械の振動監視・診断を継続して運転を継続することが可能な回転機械の振動診断システムを提供することが出来る。   As described above, according to the present invention, when one rotation reference signal of the rotating machine from the phase angle reference signal generator disappears, the rotation reference signal selection circuit that automatically switches to one rotation signal from the vibration detector. Therefore, it is possible to provide a vibration diagnosis system for a rotating machine that can continue the operation by continuously monitoring and diagnosing the vibration of the rotating machine even if the one-rotation reference signal disappears for some reason.

以下、本発明の実施例について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

本発明に係る実施例について、図面を参照して説明する。図１は、本発明の回転機械の振動診断システムの構成図である。   Embodiments according to the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a vibration diagnosis system for a rotating machine according to the present invention.

図１において、タービン発電機１は、タービン２ａ乃至２ｃ及び発電機１ａを備え、その各ロータを支える軸受部には、軸振動を検出する振動検出器３ａ乃至３ｆが取付けられている。   In FIG. 1, a turbine generator 1 includes turbines 2a to 2c and a generator 1a, and vibration detectors 3a to 3f for detecting shaft vibration are attached to bearings supporting the rotors.

また、タービン・発電機１内には、ロータの回転数を検出する図示しない回転計、各軸受部での振動位相角を検出するための基準となる１回転基準信号を発信する位相角基準信号発生器４、及び発電機の出力や蒸気温度、軸受温度等の回転機械の運転状態を検出する図示しない各種センサー群が設置されている。   Further, in the turbine / generator 1, a tachometer (not shown) for detecting the rotational speed of the rotor, and a phase angle reference signal for transmitting one rotation reference signal as a reference for detecting the vibration phase angle at each bearing portion. The generator 4 and various sensor groups (not shown) for detecting the operating state of the rotating machine such as the output of the generator, the steam temperature, and the bearing temperature are installed.

また、振動検出器３ｆの振動信号から１回転信号を生成する波形生成回路５と、位相角基準信号発生器４からの１回転基準信号が欠損した時に波形生成回路５で生成された１回転信号に切替える回転基準信号選択回路６とを備える。   In addition, the waveform generation circuit 5 that generates one rotation signal from the vibration signal of the vibration detector 3f and the one rotation signal generated by the waveform generation circuit 5 when the one rotation reference signal from the phase angle reference signal generator 4 is lost. And a rotation reference signal selection circuit 6 for switching to.

そして、振動検出器３ａ乃至３ｆからの振動信号と回転基準信号選択回路６から選択送出される１回転基準信号または１回転信号とは、振動監視・診断装置７に供給され、振動監視・診断装置７では、振動検出器３ａ乃至３ｆ、及び位相角基準信号発生器４からの信号に基づいて各軸受部における振動状態を診断し、規定の信号レベル以上であると判定すると、警報信号またはタービントリップ信号を図示しない回転機械の制御用計算機へ伝達する。   The vibration signals from the vibration detectors 3a to 3f and the one-rotation reference signal or one-rotation signal selectively transmitted from the rotation reference signal selection circuit 6 are supplied to the vibration monitoring / diagnostic device 7, and the vibration monitoring / diagnosis device 7, the vibration state in each bearing portion is diagnosed based on the signals from the vibration detectors 3 a to 3 f and the phase angle reference signal generator 4. The signal is transmitted to a computer for controlling a rotating machine (not shown).

次に、振動検出器３ｆから１回転信号を生成する波形成形回路５について、図２を参照して説明する。   Next, the waveform shaping circuit 5 that generates one rotation signal from the vibration detector 3f will be described with reference to FIG.

波形成形回路５は、図２１（ａ）に示すような微弱な振動信号の直流成分を除くハイパスフィルター５ａと、ハイパスフィルター５ａの出力から所定の信号レベルの方形波信号に変換する波形成形レベル変換回路５ｂと、方形波信号のエッジを捉えるハイパスフィルター５ｃと、エッジ信号の半波整流回路５ｄとからなる。   The waveform shaping circuit 5 includes a high pass filter 5a excluding the DC component of the weak vibration signal as shown in FIG. 21A, and waveform shaping level conversion for converting the output of the high pass filter 5a into a square wave signal of a predetermined signal level. The circuit 5b includes a high-pass filter 5c that captures an edge of a square wave signal, and a half-wave rectifier circuit 5d for the edge signal.

次に、夫々の詳細回路について説明する。ハイパスフィルター５ａは、受動ＣＲフィルターで、コンデンサＣ５ａと抵抗Ｒ５ａとからなる。   Next, each detailed circuit will be described. The high-pass filter 5a is a passive CR filter and includes a capacitor C5a and a resistor R5a.

波形成形レベル変換回路５ｂは、非反転増幅回路であって、オペアンプＡ５ｂ１とその外部抵抗Ｒ５ｂ１及びＲ５ｂ２からなり、ハイパスフィルター５ａの出力が、所定の増幅度に設定され、非反転増幅される。増幅された状態の波形を図２（ｂ）に示す。   The waveform shaping level conversion circuit 5b is a non-inverting amplifier circuit, and includes an operational amplifier A5b1 and its external resistors R5b1 and R5b2. The output of the high-pass filter 5a is set to a predetermined amplification degree and is non-inverted and amplified. The waveform in the amplified state is shown in FIG.

そして、増幅された信号は、さらにコンパレータ５ｂ２で図２（ｃ）に示すような方形波に成形される。   The amplified signal is further shaped into a square wave as shown in FIG. 2C by the comparator 5b2.

方形波に変換された信号は、インバータＴＬ５ｂ３及びプルアップ抵抗Ｒ５ｂ３からなるレベル変換回路５ｂ３によって、図２（ｄ）に示す論理回路レベルの信号に変換される。   The signal converted into the square wave is converted into a logic circuit level signal shown in FIG. 2D by the level conversion circuit 5b3 including the inverter TL5b3 and the pull-up resistor R5b3.

さらに、ＣＲフィルターを構成するコンデンサＣ４ｃと抵抗Ｒ５ｃとからなるハイパスフィルター５ｃで図２（ｅ）に示すようなエッジ信号とし、さらに、ツェナーダイオードＺＤ５ｄと抵抗Ｒ５ｄとからなる半波整流回路５ｄを解して図２（ｆ）に示すような論理回路レベルのパルス状の１回転信号に成形される。   Further, an edge signal as shown in FIG. 2 (e) is obtained by a high-pass filter 5c comprising a capacitor C4c and a resistor R5c constituting a CR filter, and a half-wave rectifier circuit 5d comprising a Zener diode ZD5d and a resistor R5d is further solved. Then, it is formed into a pulse-like single rotation signal at the logic circuit level as shown in FIG.

次に、位相角基準信号発生器４からの１回転基準信号が欠損した時に波形生成回路５で生成された１回転信号に切替える回転基準信号選択回路６について、図３を参照して説明する。   Next, the rotation reference signal selection circuit 6 that switches to the one rotation signal generated by the waveform generation circuit 5 when one rotation reference signal from the phase angle reference signal generator 4 is lost will be described with reference to FIG.

回転基準信号選択回路６は、位相角基準信号発生器４からの１回転基準信号と振動検出器３の振動信号を波形成形して生成された１回転信号との位相差をパルス幅信号に変換する位相差パルス幅変換回路６ａと、変換されたパルス幅信号を所定の積分定数で積分し、この積分値が予め定められた基準値以上か否かを判定し、基準値に満たない場合には１回転基準信号は存在しないと判定する位相角基準信号判定回路６ｂとからなる。   The rotation reference signal selection circuit 6 converts the phase difference between one rotation reference signal from the phase angle reference signal generator 4 and one rotation signal generated by shaping the vibration signal of the vibration detector 3 into a pulse width signal. When the phase difference pulse width conversion circuit 6a and the converted pulse width signal are integrated with a predetermined integration constant, it is determined whether or not the integration value is equal to or greater than a predetermined reference value. Comprises a phase angle reference signal determination circuit 6b for determining that there is no one rotation reference signal.

さらに、位相角基準信号判定回路６ｂからの１回転基準信号が無いと判定された時に、振動監視・診断装置７に供給する１回転基準信号を振動検出器３ｆからの１回転信号に切替える１回転信号切替スイッチ６とからなる。   Further, when it is determined that there is no one rotation reference signal from the phase angle reference signal determination circuit 6b, one rotation reference signal supplied to the vibration monitoring / diagnosis device 7 is switched to one rotation signal from the vibration detector 3f. And a signal changeover switch 6.

次に、位相角基準信号発生器４の詳細構成について説明する。位相差パルス幅変換回路６ａは、１回転基準信号でセット、１回転信号でリセットされるフリップフロップＦ６と、フリップフロップＦ６の出力をベースに接続し、エミッターを抵抗Ｒ６ａ１とツェナーダイオードＺＤ６ａを縦列接続して所定のパルス波高値の信号に変換する定電流回路と、さらに、ツェナーダイオードＺＤ６ａの両端の出力をボリュームＶＲａと抵抗Ｒ６ａ２とで分圧し、調整された波高値の１回転信号をボリュームＶＲａの中間タップ位置から送出する分圧回路とからなる。   Next, the detailed configuration of the phase angle reference signal generator 4 will be described. The phase difference pulse width conversion circuit 6a is connected with a flip-flop F6 that is set by one rotation reference signal and reset by one rotation signal, the output of the flip-flop F6 is connected to the base, and an emitter is connected in series with a resistor R6a1 and a Zener diode ZD6a. Then, the constant current circuit for converting the signal into a predetermined pulse peak value signal, and further, the output at both ends of the Zener diode ZD6a is divided by the volume VRa and the resistor R6a2, and the single rotation signal having the adjusted peak value is output from the volume VRa. It consists of a voltage dividing circuit that sends out from the intermediate tap position.

そして、ボリュームＶＲａの中間タップ位置から送出された位相差パルス幅変換回路６ａの出力を抵抗Ｒ６ｂとコンデンサＣ６ｂからなるＲＣ積分回路と、この積分回路で積分された値が予め設定される基準値ＥＲ６ｂに達するか否かを判定する比較器ＣＯ６ｂとからなる。   Then, the output of the phase difference pulse width conversion circuit 6a sent from the intermediate tap position of the volume VRa is an RC integration circuit composed of a resistor R6b and a capacitor C6b, and a reference value ER6b in which a value integrated by this integration circuit is preset. Comparator CO6b for determining whether or not

そして、比較器ＣＯ６ｂの出力は、１回転信号切替スイッチ６ｃに供給される。   The output of the comparator CO6b is supplied to the one rotation signal changeover switch 6c.

次に、この用に構成された、位相角基準信号発生器４の動作について、図４及び図５を参照して説明する。   Next, the operation of the phase angle reference signal generator 4 configured for this purpose will be described with reference to FIGS.

図４は、図４（ａ）に示す１回転基準信号と図２（ｂ）に示す１回転信号とが存在する時の位相角基準信号発生器４の動作を示す。同図（ｃ）は、フリップフロップＦ６の出力で、１回転基準信号でセットされ１回転信号でリセットされ、位相差がパルス幅信号に変換された様子を図示したものである。   FIG. 4 shows the operation of the phase angle reference signal generator 4 when the one rotation reference signal shown in FIG. 4A and the one rotation signal shown in FIG. 2B exist. FIG. 4C shows the state where the output of the flip-flop F6 is set by one rotation reference signal, reset by one rotation signal, and the phase difference is converted into a pulse width signal.

さらに、パルス幅信号に変換された信号は、図４（ｄ）に示すように積分回路で所定の積分時定数で積分され、この積分値が基準値（Ｖｒ）以上になると、スイッチは図４（ｅ）に示すように１回転基準信号を選択する。   Further, the signal converted into the pulse width signal is integrated with a predetermined integration time constant by an integration circuit as shown in FIG. 4D, and when this integration value becomes equal to or higher than the reference value (Vr), the switch is changed to FIG. As shown in (e), one rotation reference signal is selected.

図５は、図５（ａ）に示すように破線で示す１回転基準信号が存在せず図５（ｂ）に示す１回転信号のみが存在する時の位相角基準信号発生器４の動作を示す。同図（ｃ）は、１回転基準信号が存在しないのでフリップフロップＦ６の出力がリセットされた状態を示す。   FIG. 5 shows the operation of the phase angle reference signal generator 4 when the single rotation reference signal indicated by the broken line does not exist as shown in FIG. 5A and only the single rotation signal shown in FIG. 5B exists. Show. FIG. 6C shows a state in which the output of the flip-flop F6 is reset because there is no one rotation reference signal.

すると、パルス幅信号が存在しないので、図５（ｄ）に示すように積分回路の積分値は基準値（Ｖｒ）以上とならないので、スイッチは図５（ｅ）に示すように１回転信号を選択する。   Then, since there is no pulse width signal, the integration value of the integration circuit does not exceed the reference value (Vr) as shown in FIG. 5 (d), so the switch outputs one rotation signal as shown in FIG. 5 (e). select.

以上説明したように、１回転基準信号が欠落すると、回転基準信号選択回路６は、自動的に１回転信号を選択し、この回転信号が振動監視・診断装置７に送信され回転機械の振動診断システムの動作が継続される。   As described above, when one rotation reference signal is missing, the rotation reference signal selection circuit 6 automatically selects one rotation signal, and this rotation signal is transmitted to the vibration monitoring / diagnosis device 7 to diagnose vibration of the rotating machine. System operation continues.

本発明の回転機械の振動診断システムの実施例２について、図６を参照して説明する。実施例２の各部について、図１乃至図５に示す実施例１の各部と同一部分は同一符号で示し、その説明を省略する。   A second embodiment of the vibration diagnosis system for a rotating machine according to the present invention will be described with reference to FIG. In each part of the second embodiment, the same parts as those of the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.

実施例２が、実施例１と異なる点は、実施例１では、複数の振動検出器３ａ乃至３ｆの１つの振動検出器３ｆのみの振動信号を波形整形して回転基準信号選択回路６に供給したが、本実施例２では、２つの振動検出器３ｄ及び３ｆの振動信号の夫々を波形整形する波形成形回路５ａ１及び５ａ２を備え、さらにこれらの１回転信号のいずれか１つを選択する振動信号選択回路８を設け、いずれかの振動信号が欠落した場合でも１回転信号を回転基準信号選択回路６に供給するようにした点にある。   The second embodiment is different from the first embodiment in that the vibration signal of only one vibration detector 3f of the plurality of vibration detectors 3a to 3f is waveform-shaped and supplied to the rotation reference signal selection circuit 6 in the first embodiment. However, in the second embodiment, the waveform shaping circuits 5a1 and 5a2 for shaping the respective vibration signals of the two vibration detectors 3d and 3f are provided, and the vibration for selecting any one of these one rotation signals is provided. A signal selection circuit 8 is provided, and one rotation signal is supplied to the rotation reference signal selection circuit 6 even when any vibration signal is lost.

したがって、１回転基準信号及び初期選択された１回転信号が欠落した場合でも、もう１つの１回転信号が正常に検出できていれば、回転機械の振動診断システムの運転が継続できる。   Therefore, even when the one rotation reference signal and the initially selected one rotation signal are missing, the operation of the vibration diagnosis system for the rotating machine can be continued if another one rotation signal can be detected normally.

本発明は上述したような各実施例に何ら限定されるものでなく、全ての振動検出器のいずれか１つを選択できるように構成しても良く、また、１回転信号は回転機械の回転に同期した信号であれば代替が可能で、適宜変更することが出来る。   The present invention is not limited to the above-described embodiments, and any one of all vibration detectors may be selected, and one rotation signal is a rotation of a rotating machine. Any signal can be used as long as it is synchronized with the signal and can be changed as appropriate.

本発明の回転機械の振動診断システムの構成図。The block diagram of the vibration diagnosis system of the rotary machine of this invention. 本発明の振動検出器の信号の波形成形回路の構成図。The block diagram of the waveform shaping circuit of the signal of the vibration detector of this invention. 本発明の回転基準信号選択回路の構成図。The block diagram of the rotation reference signal selection circuit of this invention. 本発明の回転基準信号選択回路の動作を説明するタイムチャート。The time chart explaining operation | movement of the rotation reference signal selection circuit of this invention. 本発明の回転基準信号選択回路の動作を説明するタイムチャート。The time chart explaining operation | movement of the rotation reference signal selection circuit of this invention. 本発明の回転機械の振動診断システムの振動検出器信号の振動信号を選択する振動信号選択回路を備えた回転機械の振動診断システムの構成図。The block diagram of the vibration diagnosis system of a rotary machine provided with the vibration signal selection circuit which selects the vibration signal of the vibration detector signal of the vibration diagnosis system of the rotary machine of this invention. 本発明の従来の回転機械の振動診断システムの構成図。The block diagram of the vibration diagnostic system of the conventional rotary machine of this invention.

符号の説明Explanation of symbols

１ タービン発電機
２（２ａ、２ｂ、２ｃ） タービン
３（３ａ乃至３ｆ） 振動検出器
４ 位相角基準信号発生器
５（５ａ１、５ａ２） 波形成形回路
５ａ ハイパスフィルター
５ｂ 波形成形レベル変換回路
５ｃ ハイパスフィルター
５ｄ 半波整流回路
６ 回転基準信号選択回路
６ａ 位相差パルス幅変換回路
６ｂ 位相角基準信号判定回路
６ｃ １回転信号切替スイッチ
７ 振動監視・診断装置
８ 振動信号選択回路 1 Turbine generator 2 (2a, 2b, 2c) Turbine 3 (3a to 3f) Vibration detector 4 Phase angle reference signal generator 5 (5a1, 5a2) Waveform shaping circuit 5a High pass filter 5b Waveform shaping level conversion circuit 5c High pass filter 5d Half-wave rectifier circuit 6 Rotation reference signal selection circuit 6a Phase difference pulse width conversion circuit 6b Phase angle reference signal determination circuit 6c 1 Rotation signal selector switch 7 Vibration monitoring / diagnostic device 8 Vibration signal selection circuit

Claims (3)

回転機械の運転に伴う振動を検出してこれを表す振動信号を生成する振動検出手段と、
前記回転機械の１回転を検出してこれを表す１回転基準信号を生成する位相角基準信号発生手段と、
前記振動検出手段の振動信号を所定の信号に波形整形し、前記回転機械の１回転信号を生成する波形整形手段と、
前記１回転基準信号の有無を判定し、該１回転基準信号が無いと判定された時に前記波形成形手段から送出される前記１回転信号に切替える回転基準信号選択回路と、
前記振動検出手段の振動信号と前記回転基準信号選択回路で選択された前記１回転基準信号または前記１回転信号とから前記回転機械の振動の異常を監視・診断する振動監視・診断装置と
を備えることを特徴とする回転機械の振動診断システム。 Vibration detecting means for detecting vibration associated with the operation of the rotating machine and generating a vibration signal representing the vibration;
Phase angle reference signal generating means for detecting one rotation of the rotating machine and generating one rotation reference signal representing the rotation;
Waveform shaping means for shaping the vibration signal of the vibration detection means into a predetermined signal and generating one rotation signal of the rotating machine;
A rotation reference signal selection circuit that determines the presence or absence of the one rotation reference signal and switches to the one rotation signal sent from the waveform shaping means when it is determined that there is no one rotation reference signal;
A vibration monitoring / diagnostic device that monitors and diagnoses vibration abnormality of the rotating machine from the vibration signal of the vibration detection means and the one rotation reference signal or the one rotation signal selected by the rotation reference signal selection circuit; A vibration diagnosis system for a rotating machine. 前記回転基準信号選択回路は、前記１回転基準信号と前記振動信号から波形成形された前記１回転信号との位相差を、前記１回転基準信号を基点とするパルス幅信号に変換する位相差パルス幅変換回路と、
前記パルス幅信号の有無を判定し、前記１回転基準信号の有無を判定する位相角基準信号判定回路と、
前記１回転基準信号が存在する場合には該１回転基準信号に、そうでない場合には、前記１回転信号に切替える１回転信号切替スイッチと
を備えることを特徴とする請求項１に記載の回転機械の振動診断システム。 The rotation reference signal selection circuit converts a phase difference between the one rotation reference signal and the one rotation signal waveform-shaped from the vibration signal into a pulse width signal based on the one rotation reference signal. A width conversion circuit;
A phase angle reference signal determination circuit for determining the presence or absence of the pulse width signal and determining the presence or absence of the one-rotation reference signal;
2. The rotation according to claim 1, further comprising a one-rotation signal change-over switch that switches to the one-rotation reference signal when the one-rotation reference signal exists, and to switch to the one-rotation signal when the one-rotation reference signal does not exist. Mechanical vibration diagnosis system. 複数の前記振動検出手段の出力のいずれか１つを選択する振動信号選択回路を備え、該振動信号選択回路で選択された前記１回転信号と前記位相角基準信号とを前記回転基準信号選択回路で選択するようにしたことを特徴とする請求項１に記載の回転機械の振動診断システム。   A vibration signal selection circuit that selects any one of the outputs of the plurality of vibration detection means; and the rotation reference signal selection circuit that selects the one rotation signal and the phase angle reference signal selected by the vibration signal selection circuit. The vibration diagnosis system for a rotary machine according to claim 1, wherein the vibration diagnosis system is selected.
JP2006265560A 2006-09-28 2006-09-28 Vibration diagnosis system for rotating machinery Expired - Fee Related JP4869008B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006265560A JP4869008B2 (en) 2006-09-28 2006-09-28 Vibration diagnosis system for rotating machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006265560A JP4869008B2 (en) 2006-09-28 2006-09-28 Vibration diagnosis system for rotating machinery

Publications (2)

Publication Number Publication Date
JP2008082967A JP2008082967A (en) 2008-04-10
JP4869008B2 true JP4869008B2 (en) 2012-02-01

Family

ID=39353978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006265560A Expired - Fee Related JP4869008B2 (en) 2006-09-28 2006-09-28 Vibration diagnosis system for rotating machinery

Country Status (1)

Country Link
JP (1) JP4869008B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10132369B2 (en) 2017-01-27 2018-11-20 Hamilton Sundstrand Corporation Automatically actuated disconnect couplings

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56158921A (en) * 1980-05-14 1981-12-08 Hitachi Ltd Method for generating revolution synchronizing pulse
JPS59187229A (en) * 1983-04-06 1984-10-24 Nissan Motor Co Ltd Vibration analytical apparatus for vehicle
JPH03189351A (en) * 1989-12-20 1991-08-19 Nissan Motor Co Ltd Fuel injection system for internal combustion engine
JPH04109125A (en) * 1990-08-30 1992-04-10 Toshiba Corp Vibration phase angle measuring device
JP3337426B2 (en) * 1998-08-28 2002-10-21 三菱重工業株式会社 Rotation axis bending monitoring device
JP3530474B2 (en) * 2000-09-22 2004-05-24 三菱重工業株式会社 Wing vibration measurement method and wing vibration monitoring system using the same
JP3735059B2 (en) * 2001-11-06 2006-01-11 住友ベークライト株式会社 Adhesive film, semiconductor package or semiconductor device using the same, and method for manufacturing semiconductor package or semiconductor device

Also Published As

Publication number Publication date
JP2008082967A (en) 2008-04-10

Similar Documents

Publication Publication Date Title
JP5994305B2 (en) Rotary encoder and error detection method for rotary encoder
JP4968069B2 (en) Encoder with abnormality detection device and control system therefor
JP4381612B2 (en) Axis voltage and current monitoring system
JP4105692B2 (en) Vibration information transmitting apparatus and vibration monitoring analysis system
JPS58500605A (en) Method and device for monitoring tool status of a machine tool that performs periodic machining
WO2017163839A1 (en) State monitoring device and wind power electricity generating facility equipped with same, and electrical noise removing method
JP6542735B2 (en) Management system, spindle failure detection method and computer program
JP2018205213A (en) Composite processing machine with defect anticipating function
JP6944285B2 (en) Abnormal cause identification system for devices with rotating members
JP6628609B2 (en) Diagnosis device for wind power generation
KR20110072123A (en) Apparatus for monitoring fault of driving equipment
JP4869008B2 (en) Vibration diagnosis system for rotating machinery
JP2009133810A (en) Vibration monitoring device
JP5952535B2 (en) Failure information transmission device and motor device
JP6457589B2 (en) Abnormality diagnosis apparatus and abnormality diagnosis method
JP6577394B2 (en) Abnormality diagnosis equipment for wind power generation facilities
JP2018080924A (en) Method and system for diagnosing abnormality of bearing
JP5370397B2 (en) Motor speed monitoring device
JPH02232529A (en) Method and apparatus for diagnosing vibration of rotary machine
CN105865713A (en) Dynamic balance optimizing device and method for high-medium-pressure rotor of steam turbine generator unit
KR101134139B1 (en) Method and driver monitoring system for continuing operation of turbine generator on loss of speed pick unit
KR101801299B1 (en) Drive control device for motor using fault diagnosis information
EP3526870B1 (en) A liquid system tool having an integrated residual current device
CN113202575B (en) Rotor axial vibration protection method of steam turbine unit
JP3256324B2 (en) Rotary machine abnormality diagnosis method and apparatus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090409

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20111017

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111025

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111115

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141125

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees