JPS5812446B2 - Turbine speed increase control device - Google Patents
Turbine speed increase control deviceInfo
- Publication number
- JPS5812446B2 JPS5812446B2 JP49096108A JP9610874A JPS5812446B2 JP S5812446 B2 JPS5812446 B2 JP S5812446B2 JP 49096108 A JP49096108 A JP 49096108A JP 9610874 A JP9610874 A JP 9610874A JP S5812446 B2 JPS5812446 B2 JP S5812446B2
- Authority
- JP
- Japan
- Prior art keywords
- turbine
- speed increase
- oil
- speed
- control device
- 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
Links
Landscapes
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】
本発明はタービン振動防止装置に係り、特にタービン昇
速時に発生する振動を予知・予防するに好適なタービン
昇速制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turbine vibration prevention device, and more particularly to a turbine speed increase control device suitable for predicting and preventing vibrations occurring during turbine speed increase.
本発明に関する従来技術として、軸受給油温度の制御装
置がある。As a prior art related to the present invention, there is a bearing oil supply temperature control device.
この装置は軸受温度が低過ぎると油膜が切れやすく不安
定になり、また軸受温度が高過ぎると軸受焼損に到る恐
れがあるので、軸受給油温度を油冷却器の冷却水量を調
整することによって制御している。In this device, if the bearing temperature is too low, the oil film will easily break and become unstable, and if the bearing temperature is too high, the bearing may burn out. Therefore, the bearing oil supply temperature is adjusted by adjusting the amount of cooling water in the oil cooler. It's in control.
しかし、タービン昇速時においてオイルホイツプ発生を
防ぐためには潤滑油が適当な温度になっている必要があ
るが、潤滑油の熱容量が大きいために昇速時において冷
却水量を零にしても潤滑油温度を上昇させることが出来
ない。However, in order to prevent oil whip when the turbine speeds up, the lubricating oil needs to be at an appropriate temperature, but because the lubricating oil has a large heat capacity, even if the amount of cooling water is zero when the turbine speeds up, the lubricating oil temperature will be low. cannot be raised.
また、オイルホイップはタービン回転軸の偏心率が大き
過ぎることによって発生しやすくなるが、従来、昇速時
に検出している偏心量は回転軸のたわみ量を推定するた
めのもので、軸受における偏心率を検出することは出来
ない。In addition, oil whip is likely to occur when the eccentricity of the turbine rotating shaft is too large. Conventionally, the amount of eccentricity detected during speed increase is used to estimate the amount of deflection of the rotating shaft. rate cannot be detected.
本発明の目的は、タービン昇速時に、潤滑油温度の変化
及びタービン回転数の変化と伴に変化するオイルホイッ
プ発生回転数に対し、該回転数に達しないようにタービ
ンを昇速させ、オイルホイップによる軸受焼損を避ける
ことである。An object of the present invention is to increase the speed of the turbine so as not to reach the rotational speed at which oil whip occurs, which changes with changes in lubricating oil temperature and turbine rotational speed when the turbine speeds up. The aim is to avoid bearing burnout due to whipping.
本発明の特徴は、タービン昇連中の潤滑油温度を測定し
、この測定値とタイピン回転数とから、オイルホイップ
発生回転数を求め、該求めた回転数を越えないようにタ
ービンの昇速率を制御することにある。The feature of the present invention is to measure the lubricating oil temperature during turbine raising, determine the number of revolutions at which oil whip occurs from this measured value and the number of rotations of the tie pin, and adjust the speed-up rate of the turbine so as not to exceed the determined number of revolutions. It's about controlling.
第１図は本発明の一実施例を説明するためのプロツク線
図である。FIG. 1 is a block diagram for explaining one embodiment of the present invention.
図で１は主タービン、２は軸受、３ぱ主油タンク、４は
主油ポンプ、５は油冷却器、６は冷却水タンク、７は加
減弁、８は冷却水加減弁、９はタービン昇速制御装置、
１０は給油温度制御装置、１１は主蒸気流量、１−２は
回転数、１３は排油温度検出器、１４は給油温度検出器
、１５は回転数信号、１６は排油温度信号、１７は給油
温度信号、１Ｂは加減弁開度信号、１９は冷却水加減弁
開度信号であり、本発明になるタービン振動防止装置２
０の構成で、２１は粘性係数計算装置、２２は偏心率計
算装置、２３は昇速率発生装置であり、また、２４は粘
性係数信号、２５は偏心率信号を示す。In the figure, 1 is the main turbine, 2 is the bearing, 3 is the main oil tank, 4 is the main oil pump, 5 is the oil cooler, 6 is the cooling water tank, 7 is the control valve, 8 is the cooling water control valve, 9 is the turbine acceleration control device,
10 is an oil supply temperature control device, 11 is a main steam flow rate, 1-2 is a rotation speed, 13 is a drain oil temperature detector, 14 is a feed oil temperature detector, 15 is a rotation speed signal, 16 is a drain oil temperature signal, and 17 is a An oil supply temperature signal, 1B a control valve opening signal, 19 a cooling water control valve opening signal, and the turbine vibration prevention device 2 according to the present invention.
0, 21 is a viscosity coefficient calculation device, 22 is an eccentricity calculation device, 23 is an acceleration rate generation device, 24 is a viscosity coefficient signal, and 25 is an eccentricity rate signal.
本発明になる装置の動作および作用について、第２図で
説明する。The operation and effect of the device according to the invention will be explained with reference to FIG.
図において実線の折線で示される昇速パターンで回転数
Ｎを上昇させて行く時実線の曲線で示されるように排油
温度Ｔｏは遅れて上昇する。When the rotational speed N is increased in the speed increasing pattern shown by the solid broken line in the figure, the drain oil temperature To increases with a delay as shown by the solid curve.
本発明なる装置によれば、時刻ｔ８においてオイルホイ
ップ発生を検知すれば、回転数をホールドする。According to the device of the present invention, if the occurrence of oil whip is detected at time t8, the rotation speed is held.
そして、排油温度の上昇を待って時刻ｔ２にてもとの昇
速率に戻す。Then, after waiting for the exhaust oil temperature to rise, the speed increase rate is returned to the original speed increase rate at time t2.
−さらに詳細に本発明の動作につき説明する。- The operation of the present invention will be explained in more detail.
粘性係数算出装置２１は、第３図で示すような関数μ（
Ｔｏ）を内蔵し、排油温度Ｔｏ１６に対応した潤滑油の
粘性係数を表わす粘性係数信号２４を出力する。The viscosity coefficient calculating device 21 calculates a function μ(
It has a built-in lubricating oil viscosity coefficient signal 24 that represents the viscosity coefficient of the lubricating oil corresponding to the exhaust oil temperature To16.
ここで、μ（ Ｔｏ ）は潤滑油の種類によって実験的
に定められる。Here, μ(To) is determined experimentally depending on the type of lubricant.
偏心率計算装置２２では、まず、回転数信号１５と粘性
係数信号２４を入力して、（１）式に従ってゾンマーフ
エルト数Ｓを求める。The eccentricity calculation device 22 first inputs the rotational speed signal 15 and the viscosity coefficient signal 24, and calculates the Sommerfeld number S according to equation (1).
Ｓ一（Ｄ／Ｃ）２・μ・Ｎ／ｐ ………（１）ここ
で、μ：粘性係数、Ｓ：ゾンマーフエルト数、Ｄ：ジャ
ーナル径、Ｃ：直径間隙、ｐ；軸受面圧（一定とする）
。S1 (D/C)2・μ・N/p (1) where μ: viscosity coefficient, S: Sommerfeld number, D: journal diameter, C: diameter gap, p: bearing surface pressure (assumed to be constant)
.
次いで、第４図に従って偏心率εを求めて偏心率信号２
５を出力する。Next, the eccentricity ε is determined according to FIG. 4, and the eccentricity signal 2 is obtained.
Outputs 5.
昇速率発生装置２３は、第５図で示すような関数を内蔵
して、粘性係数信号２４−、回転数信号１５及び偏心率
信号２５を入力して昇速率信号２６を出力する。The speed increase rate generating device 23 has built-in functions as shown in FIG.
図において、現在のμ．εから（２）式によって許容回
転数ＮＭＡＸを求める。In the figure, the current μ. The allowable rotation speed NMAX is determined from ε using equation (2).
ＮＭＡＸ＝Ｎ（μ・ε） ………（２）さらに許
容回転数ＮＭＡＸと現在の回転数Ｎとの扁差が、一定値
以下になったことで、オイルホイップ発生の危険性を知
り、昇速率を零（ホーノレド）とする昇速率信号２６を
発生する。NMAX = N (μ・ε) ...... (2) Furthermore, when the difference between the allowable rotation speed NMAX and the current rotation speed N became less than a certain value, we learned that there was a danger of oil whip occurring, and A speed increase rate signal 26 that sets the speed rate to zero (honored) is generated.
尚，本発明の変形例として、オンラインで粘性係数μや
偏心率εを求めることはしないで、第３図、第４図、第
５図を利用して、回転数に対する排油温度Ｔの許容最小
値ＴＯＭＩＮ（Ｎ）を算出することが出来、オンライン
ではＴとＴＯＭＩＮとの偏差を監視する方法であっても
よい。As a modification of the present invention, instead of calculating the viscosity coefficient μ and eccentricity ε online, the allowable drain oil temperature T with respect to the rotational speed is determined using Figs. 3, 4, and 5. The minimum value TOMIN(N) can be calculated, and the deviation between T and TOMIN may be monitored online.
更に、本発明の実施例では、昇速率な零にして（回転数
ホールド）いるが、他の方法として昇速率を減少、昇速
率を負にすることも可能である。Further, in the embodiment of the present invention, the speed increase rate is set to zero (rotation speed held), but it is also possible to reduce the speed increase rate or make the speed increase rate negative as another method.
以上説明し−た本発明によれば、次記の効果を得ること
ができる。According to the present invention described above, the following effects can be obtained.
（１）タービン起動時に生じやすいオイルホイップ現象
を予防することができる。(1) It is possible to prevent the oil whip phenomenon that tends to occur when starting the turbine.
（２）オンラインで粘性係数μや偏心率εを算出して、
時々刻々、不安定に到るまでの余裕
（ＨＭＡＸ一Ｎ）を求めているので、誤動作が少ない。(2) Calculate the viscosity coefficient μ and eccentricity ε online,
Since the margin (HMAX - N) before reaching instability is sought from moment to moment, there are fewer malfunctions.
第１図は、本発明の一実施例を示すブロック線図、第２
図は、本発明の動作、作用を説明するための図、第３図
は、本発明で利用している潤滑油の特性図、第４図は、
本発明で利用している軸受の特性図、第５図は、本発明
で利用している軸受の特性図である。
符号の説明、１……主タービン、２……軸受、３……主
油タンク、４……主油ポンプ、５……油冷却器、６……
冷却水タンク、７……加減弁、８……冷却水加減弁、９
……タービン昇速制御装置、１０……給油温度制御装置
、１３……排油温度検出器、１４……給油温度検出器、
２０……タービン振動防止装置、２１……粘性係数計算
装置、２２……偏入率計算装置、２３……昇速率発生装
置。FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is a diagram for explaining the operation and effect of the present invention, Figure 3 is a characteristic diagram of the lubricating oil used in the present invention, and Figure 4 is a diagram for explaining the operation and effect of the present invention.
FIG. 5 is a characteristic diagram of the bearing used in the present invention. FIG. 5 is a characteristic diagram of the bearing used in the present invention. Explanation of symbols, 1...Main turbine, 2...Bearing, 3...Main oil tank, 4...Main oil pump, 5...Oil cooler, 6...
Cooling water tank, 7...Adjustment valve, 8...Cooling water adjustment valve, 9
... Turbine speed increase control device, 10 ... Oil supply temperature control device, 13 ... Drain oil temperature detector, 14 ... Oil supply temperature detector,
20... Turbine vibration prevention device, 21... Viscosity coefficient calculation device, 22... Deviation rate calculation device, 23... Acceleration rate generation device.
Claims (1)
排油温度を測定する検出器と、該タービンの回転数を測
定する検出器と、該排油温度測定値と該回転数測定値と
からオイルホイップ発生回転数を求める演算器と、該オ
イルホイップ発生回転数とタービンの回転数とを比較し
て該タービン回転数が該オイルホイップ発生回転数を超
えないように昇速率を求める昇速率発生装置とを備え、
該求められた昇速率で昇速することを特徴としたタービ
ン昇速制御装置。1. In a turbine speed increase control device, a detector that measures the turbine bearing exhaust oil temperature, a detector that measures the rotation speed of the turbine, and an oil whip based on the exhaust oil temperature measurement value and the rotation speed measurement value. a computing unit that calculates the number of revolutions that occur; a speed increase rate generating device that compares the number of revolutions that generate oil whip with the number of revolutions of a turbine and determines a speed increase rate so that the number of rotations of the turbine does not exceed the number of revolutions that generate oil whip; Equipped with
A turbine speed increase control device that increases speed at the determined speed increase rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49096108A JPS5812446B2 (en) | 1974-08-23 | 1974-08-23 | Turbine speed increase control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49096108A JPS5812446B2 (en) | 1974-08-23 | 1974-08-23 | Turbine speed increase control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5124402A JPS5124402A (en) | 1976-02-27 |
| JPS5812446B2 true JPS5812446B2 (en) | 1983-03-08 |
Family
ID=14156180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49096108A Expired JPS5812446B2 (en) | 1974-08-23 | 1974-08-23 | Turbine speed increase control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812446B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52107590A (en) * | 1976-03-05 | 1977-09-09 | Japan Storage Battery Co Ltd | Device for indicating number of uses of connector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842202A (en) * | 1971-10-01 | 1973-06-20 |
-
1974
- 1974-08-23 JP JP49096108A patent/JPS5812446B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842202A (en) * | 1971-10-01 | 1973-06-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5124402A (en) | 1976-02-27 |
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