JP3596641B2 - Operating method of lubricating device for steam turbine - Google Patents

Operating method of lubricating device for steam turbine Download PDF

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Publication number
JP3596641B2
JP3596641B2 JP9060196A JP9060196A JP3596641B2 JP 3596641 B2 JP3596641 B2 JP 3596641B2 JP 9060196 A JP9060196 A JP 9060196A JP 9060196 A JP9060196 A JP 9060196A JP 3596641 B2 JP3596641 B2 JP 3596641B2
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Japan
Prior art keywords
oil
turning
lubricating oil
lubricating
steam turbine
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Expired - Lifetime
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JP9060196A
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Japanese (ja)
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JPH09256807A (en
Inventor
佳史 加藤
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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Priority to JP9060196A priority Critical patent/JP3596641B2/en
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Description

【0001】
【発明の属する技術分野】
この発明は、蒸気タービンの潤滑装置、特にターニング運転時に油ターニング装置へ潤滑油を供給する潤滑装置の運転方法に関する。
【0002】
【従来の技術】
図3は、従来の油ターニング装置を備えた蒸気タービンの潤滑装置の系統図である。
蒸気タービンの潤滑系統は制御油系統の一部をも兼ねているのが一般的である。図3に示すように、蒸気タービンの制御部への制御油圧はタービン軸端に直結された電動主潤滑油ポンプ1により油タンク2から配管1aを介して供給されるが、この電動主潤滑油ポンプ1の事故あるいはタービンの起動時で回転数が低いため、充分な油圧がでない場合には前記した電動主潤滑油ポンプ1と同一容量の補助潤滑油ポンプ3により油圧が確保されるように構成されている。
【0003】
そして、蒸気タービンの軸受部には、前記の電動主潤滑油ポンプ1の配管1aに連通する配管1bを介して、冷却器4によって冷却された後にフイルタ5を通る潤滑油系統により供給される。この場合に、軸受部の油圧の低下は軸受への潤滑油の減少をきたし、軸受の焼損等の大きな事故に結びつくため、前記の電動主潤滑油ポンプ1,補助潤滑油ポンプ3の他に、軸受関係だけに潤滑油を供給する非常潤滑ポンプ6が設けられており、この非常潤滑ポンプ6は交流電源喪失時にも軸受に潤滑油を供給できるように一般に直流電源により駆動される。
【0004】
さて、図3に示すように、蒸気タービンの潤滑装置には、タービンの起動・停止時に油圧により回転子を低速回転させ、回転子の温度分布を一様にして回転子軸の曲がりを防ぐための油ターニング装置が設けられている。この油ターニング装置の駆動は、ターニング油ポンプ7により油タンク2から油ターニング装置の駆動部及び軸受部に潤滑油を供給して行うようにしている。この油圧により回転子を駆動する油ターニング装置は、電動式のターニング装置と比して、高速(80〜120rpm) 回転できるために、軸受部に油膜が形成されやすく、回転子の曲げが生じにくいという特徴を有している。そして、このターニング油ポンプ7はタービン運転中に軸受油圧が規定値以下に低下すれば自動起動して軸受の焼損を防止するようになっている。
また、タービンの低速回転域における油膜の確保を容易にし、軸受メタルの保護をするように高圧油を給油して回転子をジャッキアップするジャッキング油ポンプ8をも油タンク2に備えている。
【0005】
【発明が解決しようとする課題】
前記したように、蒸気タービンの潤滑装置は、各種アクチュエータの制御部、軸受部及び油ターニング装置等へ潤滑油を供給する潤滑油系統からなっているが、このなかで油ターニング装置への供給は、油タンク2の潤滑油を前記油ターニング装置に供給するために設けられた専用のターニング用ポンプ7とジャッキング油ポンプ8の駆動により行われ、また、前記のターニング用ポンプ7は油ターニング装置の駆動部と軸受部の2つへ潤滑油を供給する構成からなっているために、潤滑系統の構成機器が多くなり装置の信頼性に劣り、保守管理に時間を要するという問題があった。
【0006】
このために、ターニング油ポンプ7を省略して、ターニング運転時に使用しない前記した電動主潤滑油ポンプ1あるいは補助潤滑油ポンプ3の何れかを用いて、油ターニング装置の駆動部と軸受部とにターニング油と軸受潤滑油とを供給する構成を採用する場合もあるが、この場合には前記のターニング油供給のために電動主潤滑油ポンプ1あるいは、補助潤滑油ポンプ3の容量を大きくする必要があり、また信頼性にも難点があった。
【0007】
この発明の課題は、前記の問題を解決し故障のもとになる潤滑装置を構成する構成機器の運転を減らすとともに、構成機器の大容量化による信頼性の低下を招くことがなく、かつ補機動力を消費する前記構成機器の潤滑油供給ポンプの容量を小さくすることができる蒸気タービンの潤滑装置の運転方法を提供することにある。
【0008】
【課題を解決するための手段】
上記した課題を解決するために、この発明は、油ターニング装置を備えた蒸気タービンの潤滑装置において、蒸気タービンのターニング運転時に、電動主潤滑油ポンプと補助潤滑油ポンプとを同時に運転して油タンク内から油ターニング装置の駆動部と軸受部とにターニング油と軸受潤滑油とを同時に供給するようにする。
これにより、従来の油ターニング装置の駆動部及び軸受部に潤滑油を供給するための専用のターニング用ポンプを用いない構成からなる蒸気タービンの潤滑装置とすることが可能となる。
【0009】
また、蒸気タービンのターニング運転時に、電動主潤滑油ポンプと補助潤滑油ポンプとを同時に運転して油タンク内から油ターニング装置の駆動部にターニング油を供給し、ターニング油ポンプにて前記ターニング装置の軸受部に軸受潤滑油を供給するようにすることにより、ターニング油ポンプと補助ポンプ両方の容量を小さくすることができる。
【0010】
【発明の実施の形態】
以下この発明の実施の形態を図に基づいて説明する。
実施の形態1
図1は、この発明の第1の実施の形態を示す潤滑装置の系統図である。
この潤滑装置は、図1に示すように、蒸気タービンの各制御部へ油タンク2から潤滑油の制御油圧を供給する配管1aに電磁弁9を介して油ターニング装置の駆動部及び軸受部へ連結する配管1cを設けて、油ターニング装置へ潤滑油を供給するように構成している。
そして、ターニング運転時には、蒸気タービンの起動あるいは停止前後の回転数を検出して、ジャッキング油ポンプ8で油タンク2からの高圧潤滑油で蒸気タービンの回転子をジャッキアップして、前記した電動主潤滑油ポンプ1と補助潤滑油ポンプ3とを同時に駆動させるとともに、電磁弁9を作動させて前記配管1aと配管1cを連通させることにより、油ターニング装置の駆動部及び軸受部へ油タンク2から潤滑油を供給するようにする。
したがって、この実施の形態による潤滑装置の運転では、従来の油ターニング装置へ潤滑油を供給するターニング用ポンプ7(図3参照)を用いることを必要としないので、この専用のターニング用ポンプ7を省略することができる。
【0011】
実施の形態2
図2は、この発明の第2の実施の形態を示す潤滑装置の系統図である。
この第2の実施の形態と前記第1の実施の形態の潤滑装置の運転方法の違いは、従来と同様にターニング用ポンプ7を設けて、このターニング用ポンプ7を油ターニング装置の軸受部の軸受潤滑油の供給用にのみ使用することにある。
即ち、図2に示すように、油ターニング装置の軸受部は、ターニング油ポンプ7からの配管1dに連結され、そして、蒸気タービンの制御部へ制御油圧を供給する配管1aには電磁弁10が設けられ、この電磁弁10に蒸気タービンの軸受部潤滑系統へ連結する配管1bと、油ターニング装置の駆動部へ連結する配管1eとがそれぞれ設けられている。
【0012】
そして、ターニング運転時には、実施の形態1と同様にジャッキング油ポンプ8と、前記したターニング油ポンプ7とを駆動させるとともに、電動主潤滑油ポンプ1と補助潤滑油ポンプ3との2台を同時に駆動させ、電磁弁10を作動させて前記の制御部への制御油圧を供給する配管1aと配管1eとを連通させることにより、油ターニング装置の駆動部へ油タンク2の潤滑油を圧油供給するようにする。
この第2の実施の形態での潤滑装置の運転では、油ターニング装置の駆動部と軸受部への潤滑油の供給系統を分けて運転しているので、従来の潤滑装置によるものよりも補助潤滑油ポンプ3及びターニング用ポンプ7の容量のいずれも小さくすることができる。
【0013】
【発明の効果】
以上のように、この発明においては、油ターニング装置を備えた蒸気タービンの潤滑装置において、蒸気タービンのターニング運転時に、電動主潤滑油ポンプと補助潤滑油ポンプとを同時に駆動させて油タンク内から油ターニング装置の駆動部及び軸受部にターニング油及び軸受潤滑油とを同時に供給するようにしたので、油ターニング装置専用のターニング用ポンプを省略でき、潤滑装置の構成機器を減らすことができ、潤滑装置の保守管理を容易化することができる。
【0014】
また、電動主潤滑油ポンプと補助潤滑油ポンプとで油ターニング装置の駆動部へ潤滑圧油を供給し、ターニング油ポンプからは前記ターニング装置の軸受部のみに軸受潤滑油を供給するようにするように運転することにより、潤滑装置の構成機器の大容量化による装置の信頼性の低下を招くことがなく、かつ補機動力を消費する前記した潤滑油供給ポンプの容量を小さくした経済的な潤滑装置を得ることができる。
【図面の簡単な説明】
【図1】この発明の第1の実施の形態を示す油ターニング装置を備えた蒸気タービンの潤滑装置の系統図である。
【図2】この発明の第2の実施の形態を示す油ターニング装置を備えた蒸気タービンの潤滑装置の系統図である。
【図3】従来の油ターニング装置を備えた蒸気タービンの潤滑装置の系統図である。
【符号の説明】
1 電動主潤滑油ポンプ
1a 配管
1b 配管
1c 配管
1d 配管
1e 配管
2 油タンク
3 補助潤滑油ポンプ
6 非常潤滑油ポンプ
7 ターニング油ポンプ
8 ジャッキング油ポンプ
9 電磁弁
10 電磁弁
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of operating a lubricating device for a steam turbine, and particularly to a lubricating device that supplies lubricating oil to an oil turning device during a turning operation.
[0002]
[Prior art]
FIG. 3 is a system diagram of a lubricating device for a steam turbine provided with a conventional oil turning device.
Generally, a lubrication system of a steam turbine also serves as a part of a control oil system. As shown in FIG. 3, the control oil pressure to the control unit of the steam turbine is supplied from an oil tank 2 via a pipe 1a by an electric main lubricating oil pump 1 directly connected to a turbine shaft end. If the oil pressure is not sufficient because the rotation speed is low at the time of the accident of the pump 1 or the startup of the turbine, the hydraulic pressure is secured by the auxiliary lubricating oil pump 3 having the same capacity as the electric main lubricating oil pump 1 described above. Have been.
[0003]
The lubricating oil system is cooled by the cooler 4 and then passed through the filter 5 to the bearing of the steam turbine via a pipe 1b communicating with the pipe 1a of the electric main lubricating oil pump 1 described above. In this case, a decrease in the oil pressure of the bearing part causes a decrease in the amount of lubricating oil to the bearing and leads to a major accident such as burning of the bearing. Therefore, in addition to the electric main lubricating oil pump 1 and the auxiliary lubricating oil pump 3, An emergency lubrication pump 6 for supplying lubricating oil only to the bearings is provided, and this emergency lubrication pump 6 is generally driven by a DC power supply so as to be able to supply lubricating oil to the bearing even when AC power is lost.
[0004]
As shown in FIG. 3, a lubricating device for a steam turbine has a rotor for rotating at a low speed by hydraulic pressure when the turbine is started and stopped to make the temperature distribution of the rotor uniform and to prevent the bending of the rotor shaft. Oil turning device is provided. The driving of the oil turning device is performed by supplying lubricating oil from the oil tank 2 to the driving portion and the bearing portion of the oil turning device by the turning oil pump 7. Since the oil turning device that drives the rotor by the hydraulic pressure can rotate at a high speed (80 to 120 rpm) as compared with the electric turning device, an oil film is easily formed on the bearing portion, and the rotor is hardly bent. It has the feature of. The turning oil pump 7 automatically starts up when the bearing oil pressure falls below a specified value during turbine operation to prevent burnout of the bearing.
The oil tank 2 also includes a jacking oil pump 8 that facilitates securing an oil film in a low-speed rotation region of the turbine and supplies high-pressure oil to jack up the rotor so as to protect the bearing metal.
[0005]
[Problems to be solved by the invention]
As described above, a lubricating device for a steam turbine includes a lubricating oil system that supplies lubricating oil to a control unit of various actuators, a bearing unit, an oil turning device, and the like. This is performed by driving a dedicated turning pump 7 and a jacking oil pump 8 provided to supply the lubricating oil in the oil tank 2 to the oil turning device. The turning pump 7 is an oil turning device. However, since the lubricating oil is supplied to the two drive units and the bearing unit, the number of components of the lubrication system increases, the reliability of the device becomes poor, and there is a problem that time is required for maintenance management.
[0006]
For this purpose, the turning oil pump 7 is omitted, and either the above-mentioned electric main lubricating oil pump 1 or the auxiliary lubricating oil pump 3 which is not used during the turning operation is used for the driving portion and the bearing portion of the oil turning device. In some cases, a configuration in which turning oil and bearing lubricating oil are supplied is adopted. In this case, however, it is necessary to increase the capacity of the electric main lubricating oil pump 1 or the auxiliary lubricating oil pump 3 for supplying the turning oil. And there were also difficulties in reliability.
[0007]
An object of the present invention is to solve the above-described problems and reduce the operation of the components constituting the lubricating device that causes a failure, and without reducing the reliability by increasing the capacity of the components, and It is an object of the present invention to provide a method for operating a lubricating device for a steam turbine, which can reduce the capacity of a lubricating oil supply pump of the component device which consumes mobility.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention relates to a steam turbine lubricating device provided with an oil turning device, in which during operation of the steam turbine turning operation, the electric main lubricating oil pump and the auxiliary lubricating oil pump are simultaneously operated to obtain oil. Turning oil and bearing lubricating oil are simultaneously supplied from the tank to the drive unit and the bearing unit of the oil turning device.
This makes it possible to provide a steam turbine lubrication device having a configuration that does not use a dedicated turning pump for supplying lubricating oil to the driving unit and the bearing unit of the conventional oil turning device.
[0009]
Further, during the turning operation of the steam turbine, the electric main lubricating oil pump and the auxiliary lubricating oil pump are simultaneously operated to supply turning oil from the oil tank to the drive unit of the oil turning device, and the turning device is turned by the turning oil pump. By supplying the bearing lubricating oil to the bearing portion of the above, it is possible to reduce the capacity of both the turning oil pump and the auxiliary pump.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
FIG. 1 is a system diagram of a lubricating device showing a first embodiment of the present invention.
As shown in FIG. 1, this lubricating device is connected to a drive unit and a bearing unit of an oil turning device via a solenoid valve 9 to a pipe 1a for supplying a control oil pressure of lubricating oil from an oil tank 2 to each control unit of a steam turbine. A connecting pipe 1c is provided to supply lubricating oil to the oil turning device.
During the turning operation, the number of revolutions before and after the start or stop of the steam turbine is detected, and the rotor of the steam turbine is jacked up with the high-pressure lubricating oil from the oil tank 2 by the jacking oil pump 8, and the electric motor is turned on. By driving the main lubricating oil pump 1 and the auxiliary lubricating oil pump 3 at the same time, and operating the solenoid valve 9 to communicate the pipes 1a and 1c, the oil tank 2 is connected to the driving section and the bearing section of the oil turning device. To supply the lubricating oil.
Therefore, in the operation of the lubricating device according to the present embodiment, it is not necessary to use the turning pump 7 (see FIG. 3) for supplying the lubricating oil to the conventional oil turning device. Can be omitted.
[0011]
Embodiment 2
FIG. 2 is a system diagram of a lubricating device showing a second embodiment of the present invention.
The difference between the method of operating the lubricating device of the second embodiment and the method of operating the lubricating device of the first embodiment is that a turning pump 7 is provided in the same manner as in the prior art, and the turning pump 7 is mounted on the bearing of the oil turning device. It is to be used only for supplying bearing lubricating oil.
That is, as shown in FIG. 2, the bearing of the oil turning device is connected to the pipe 1d from the turning oil pump 7, and the solenoid valve 10 is connected to the pipe 1a for supplying control oil pressure to the control unit of the steam turbine. The solenoid valve 10 is provided with a pipe 1b connected to a lubrication system of a bearing portion of the steam turbine and a pipe 1e connected to a drive section of the oil turning device.
[0012]
During the turning operation, the jacking oil pump 8 and the above-described turning oil pump 7 are driven as in the first embodiment, and the two units of the electric main lubricating oil pump 1 and the auxiliary lubricating oil pump 3 are simultaneously operated. The lubricating oil in the oil tank 2 is supplied to the drive unit of the oil turning device by driving the solenoid valve 10 to operate the solenoid valve 10 to connect the pipe 1a and the pipe 1e for supplying the control oil pressure to the control unit. To do.
In the operation of the lubricating device according to the second embodiment, since the lubricating oil supply system to the driving portion and the bearing portion of the oil turning device is separately operated, the auxiliary lubricating device is more lubricated than the conventional lubricating device. Both the capacity of the oil pump 3 and the capacity of the turning pump 7 can be reduced.
[0013]
【The invention's effect】
As described above, according to the present invention, in the steam turbine lubrication device provided with the oil turning device, during the turning operation of the steam turbine, the electric main lubricating oil pump and the auxiliary lubricating oil pump are driven at the same time, and from inside the oil tank. Turning oil and bearing lubricating oil are simultaneously supplied to the drive unit and the bearing unit of the oil turning device, so a turning pump dedicated to the oil turning device can be omitted, and the number of components of the lubrication device can be reduced, and lubrication can be reduced. The maintenance of the device can be facilitated.
[0014]
Further, the electric main lubricating oil pump and the auxiliary lubricating oil pump supply lubricating pressure oil to the driving portion of the oil turning device, and the turning oil pump supplies bearing lubricating oil only to the bearing portion of the turning device. By operating as described above, the reliability of the device is not reduced due to the increase in the capacity of the components of the lubricating device, and the capacity of the lubricating oil supply pump that consumes auxiliary power is reduced. A lubrication device can be obtained.
[Brief description of the drawings]
FIG. 1 is a system diagram of a lubrication device for a steam turbine provided with an oil turning device according to a first embodiment of the present invention.
FIG. 2 is a system diagram of a lubricating device for a steam turbine including an oil turning device according to a second embodiment of the present invention.
FIG. 3 is a system diagram of a lubrication device for a steam turbine provided with a conventional oil turning device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric main lubricating oil pump 1a Piping 1b Piping 1c Piping 1d Piping 1e Piping 2 Oil tank 3 Auxiliary lubricating oil pump 6 Emergency lubricating oil pump 7 Turning oil pump 8 Jacking oil pump 9 Solenoid valve 10 Solenoid valve

Claims (2)

油タンク内の潤滑油を油ターニング装置を備えた蒸気タービンの制御部、軸受部及び前記油ターニング装置の駆動部のそれぞれに供給する電動主潤滑油ポンプ、補助潤滑油ポンプ、非常潤滑油ポンプ、ターニング油ポンプ及びジャッキング油ポンプ並びに油フイルター、油冷却器、油清浄器等から構成される蒸気タービンの潤滑装置において、蒸気タービンのターニング運転時に、電動主潤滑油ポンプと補助潤滑油ポンプとを同時に運転して、油タンク内から油ターニング装置の駆動部と軸受部とにターニング油と軸受潤滑油とを同時に供給することを特徴とする蒸気タービンの潤滑油装置の運転方法。An electric main lubricating oil pump, an auxiliary lubricating oil pump, an emergency lubricating oil pump that supplies lubricating oil in an oil tank to a control unit, a bearing unit, and a driving unit of the oil turning device of a steam turbine having an oil turning device. In a lubricating device for a steam turbine including a turning oil pump, a jacking oil pump, an oil filter, an oil cooler, an oil purifier, and the like, the electric main lubricating oil pump and the auxiliary lubricating oil pump are used during the turning operation of the steam turbine. A method for operating a lubricating oil device for a steam turbine, wherein the lubricating oil device for a steam turbine is simultaneously operated to simultaneously supply turning oil and bearing lubricating oil from inside an oil tank to a driving portion and a bearing portion of the oil turning device. 油タンク内の潤滑油を油ターニング装置を備えた蒸気タービンの制御部、軸受部及び前記油ターニング装置の駆動部のそれぞれに供給する電動主潤滑油ポンプ、補助潤滑油ポンプ、非常潤滑油ポンプ、ターニング油ポンプ及びジャッキング油ポンプ並びに油フイルター、油冷却器、油清浄器等から構成される蒸気タービンの潤滑装置において、蒸気タービンのターニング運転時に、電動主潤滑油ポンプと補助潤滑油ポンプとを同時に運転して、油タンク内から油ターニング装置の駆動部にターニング油を供給し、ターニング油ポンプにて前記油ターニング装置の軸受部に軸受潤滑油を供給することを特徴とする蒸気タービンの潤滑装置の運転方法。An electric main lubricating oil pump, an auxiliary lubricating oil pump, an emergency lubricating oil pump that supplies lubricating oil in an oil tank to a control unit, a bearing unit, and a driving unit of the oil turning device of a steam turbine having an oil turning device. In a lubricating device for a steam turbine including a turning oil pump, a jacking oil pump, an oil filter, an oil cooler, an oil purifier, and the like, the electric main lubricating oil pump and the auxiliary lubricating oil pump are used during the turning operation of the steam turbine. A lubrication system for a steam turbine, wherein the lubricating oil is supplied to a driving portion of an oil turning device from inside an oil tank, and turning oil is supplied to a bearing portion of the oil turning device by a turning oil pump. How to operate the device.
JP9060196A 1996-03-19 1996-03-19 Operating method of lubricating device for steam turbine Expired - Lifetime JP3596641B2 (en)

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Application Number Priority Date Filing Date Title
JP9060196A JP3596641B2 (en) 1996-03-19 1996-03-19 Operating method of lubricating device for steam turbine

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JP3596641B2 true JP3596641B2 (en) 2004-12-02

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Publication number Priority date Publication date Assignee Title
US6286299B1 (en) * 1999-04-26 2001-09-11 General Electric Co. Gas turbine combined lift/hydraulic system
CN105545382A (en) * 2016-01-08 2016-05-04 湖南创元铝业有限公司 Lubricating system for steam turbine of thermal generator set
US11293313B2 (en) 2018-09-19 2022-04-05 Saudi Arabian Oil Company Turbomachinery lubrication system improvement gravity rundown tanks
CN109026203A (en) * 2018-10-26 2018-12-18 山东南山铝业股份有限公司 A kind of oil supply system of turbo-engine lube and the lube plant of gas turbine

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