JPH0564016B2 - - Google Patents
Info
- Publication number
- JPH0564016B2 JPH0564016B2 JP21975286A JP21975286A JPH0564016B2 JP H0564016 B2 JPH0564016 B2 JP H0564016B2 JP 21975286 A JP21975286 A JP 21975286A JP 21975286 A JP21975286 A JP 21975286A JP H0564016 B2 JPH0564016 B2 JP H0564016B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- bearing
- pump
- pressure
- flushing
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 44
- 238000011010 flushing procedure Methods 0.000 claims description 22
- 230000005856 abnormality Effects 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 230000010349 pulsation Effects 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフラツシング油ポンプを有するタービ
ン発電機の軸密封油装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shaft sealing oil system for a turbine generator having a flushing oil pump.
従来のタービン発電機の軸密封油装置は、特開
昭58−148641号公報に記載のように、常用および
非常用の密封油ポンプのいずれかにより密封油を
供給している。
Conventional shaft sealing oil devices for turbine generators supply sealing oil using either regular or emergency sealing oil pumps, as described in JP-A-58-148641.
この種の軸密封油装置を第３図に示している。
図示しない油タンクからの密封油は軸受給油ポン
プ２４、逆止弁１３ａ，１３ｂおよびレベル調節
弁９を介して真空槽８内に供給されており、この
真空槽８から定常状態では常用密封油ポンプ７、
逆止弁５ａ、密封油差圧調節弁４を介して軸密封
装置２へ供給されている。また常用密封油ポンプ
７の故障時に備えて非常用密封油ポンプ２０が設
けられ、常用密封用ポンプ７の故障を圧力継電器
６によつて検出し、遅延回路３１を介して非常用
密封油ポンプ２０が運転されるように構成されて
いた。 This type of shaft seal oil system is shown in FIG.
Seal oil from an oil tank (not shown) is supplied into the vacuum chamber 8 via a bearing oil supply pump 24, check valves 13a, 13b, and level control valve 9. 7,
The oil is supplied to the shaft sealing device 2 via the check valve 5a and the sealing oil differential pressure regulating valve 4. In addition, an emergency sealing oil pump 20 is provided in case the regular sealing oil pump 7 breaks down. was configured to be operated.
従来の軸密封油装置は上述の如き構成であつた
が、常用および非常用密封油ポンプ７，２０が共
に故障した場合については、十分な配慮がなされ
ていなかつた。つまり両密封油ポンプ７，２０の
故障に際しては、軸受給油ポンプ２４から逆止弁
１３ａ，１３ｂ、逆止弁１２および密封油差圧調
節弁４を介して軸密封装置２へ密封油を供給する
ことになるが、この軸受給油ポンプ２４からの密
封油は、例えば、1.8Kg／cm2と最小密封油圧力を
確保できるものの、密封油ポンプ７，２０の使用
時よりも圧力が低い。従つて、水素冷却装置の水
素ガスが軸受部３からリークしないように水素大
気放出弁２２を手動により開いて、機内水素ガス
を放出して圧力調整を行なう必要があり、これに
伴つて負荷を低下させてタービンランバツクをし
なければならなかつた。
Although the conventional shaft sealing oil device has the above-described configuration, sufficient consideration has not been given to the case where both the regular and emergency sealing oil pumps 7 and 20 fail. In other words, in the event of a failure in both sealing oil pumps 7 and 20, sealing oil is supplied from the bearing oil supply pump 24 to the shaft sealing device 2 via the check valves 13a and 13b, the check valve 12, and the sealing oil differential pressure regulating valve 4. Although the sealing oil from this bearing oil supply pump 24 can ensure a minimum sealing oil pressure of, for example, 1.8 kg/cm 2 , the pressure is lower than when the sealing oil pumps 7 and 20 are used. Therefore, in order to prevent hydrogen gas from the hydrogen cooling system from leaking from the bearing part 3, it is necessary to manually open the hydrogen atmosphere release valve 22 and release the hydrogen gas inside the machine to adjust the pressure. I had to lower the engine speed and perform a turbine runback.
本発明の目的は、密封油ポンプの台数を増やす
ことなく、常用および非常用密封油ポンプが故障
した場合でも負荷を低下させることなくタービン
発電機の継続運転を可能にしたタービン発電機の
軸密封油装置を提供するにある。 The object of the present invention is to provide a shaft seal for a turbine generator that enables continuous operation of the turbine generator without reducing the load even if regular and emergency seal oil pumps fail without increasing the number of seal oil pumps. Located in providing oil equipment.
本発明は上記目的を達成するために、常用およ
び非常用密封油ポンプの異常を検出する異常判定
回路を設け、この故障判定回路の検出によつてフ
ラツシング油ポンプを作動し、また上記故障判定
回路の検出によつて、フラツシング用ドレン弁を
軸受排油戻りライン側との接続に切替える切替装
置、および上記フラツシング油ポンプからの軸受
給油を所定の圧力に調整する軸受給油圧力調節弁
装置を設けたことを特徴とする。
In order to achieve the above object, the present invention provides an abnormality determination circuit for detecting abnormalities in regular and emergency sealed oil pumps, operates a flushing oil pump based on the detection of this failure determination circuit, and A switching device that switches the flushing drain valve to the bearing drain oil return line side upon detection of It is characterized by
本発明は上述の如く構成したため、常用および
非常用密封油ポンプに異常があつたことを異常判
定回路が検出すると、据付け時などに行なうフラ
ツシングのための現有のフラツシング油ポンプを
起動させ、これによつて密封油を供給することが
でき、新たに第３の密封油ポンプを付設すること
なく継続運転が可能である。
Since the present invention is configured as described above, when the abnormality determination circuit detects that there is an abnormality in the regular and emergency sealed oil pumps, it starts the existing flushing oil pump for flushing performed at the time of installation, etc. Therefore, sealing oil can be supplied, and continuous operation is possible without adding a third sealing oil pump.
以下本発明の実施例を第１図および第２図を用
いて説明する。
Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.
第１図に示すように、タービン発電機３２は、
機内温度上昇を防ぐため水素冷却装置と、回転子
軸が固定子を貫通する部分から機内水素が漏れな
いよう軸密封装置２とを併せ持つている。水素冷
却装置の水素圧力は水素圧力調節弁１５によつて
設定された圧力に制御している。また軸受給油ラ
インから真空槽８へ満された油は、真空ポンプ１
０により脱気された後、例えば交流電源の常用密
封油ポンプ７と、例えば直流電源の非常用密封油
ポンプ２０とにより昇圧される。昇圧された油
は、機内ガス圧よりも少し高い密封油圧力になる
よう密封油差圧調整弁４により制御された後、軸
密封油装置２へ供給される。 As shown in FIG. 1, the turbine generator 32 is
It is equipped with a hydrogen cooling device to prevent the temperature inside the machine from rising, and a shaft sealing device 2 to prevent hydrogen inside the machine from leaking from the part where the rotor shaft passes through the stator. The hydrogen pressure in the hydrogen cooling device is controlled to a set pressure by a hydrogen pressure control valve 15. Also, the oil filled into the vacuum tank 8 from the bearing oil supply line is transferred to the vacuum pump 1.
After being deaerated by 0, the pressure is increased by, for example, a regular seal oil pump 7 powered by an AC power source and an emergency seal oil pump 20 powered by a DC power source, for example. The pressurized oil is supplied to the shaft sealing oil device 2 after being controlled by the sealing oil differential pressure regulating valve 4 so that the sealing oil pressure is slightly higher than the in-machine gas pressure.
次に第３図との相違部分について説明する。非
常用密封油ポンプ２０の吐出側に圧力継電器１８
が付設され、この圧力継電器１８からの信号ある
いは常用密封油ポンプ７の吐出側の圧力継電器６
と圧力継電器１８との両信号によつて両密封油ポ
ンプ７，２０の異常を検出する異常検出回路３０
を構成している。またフラツシング用ドレン弁２
８は３方弁であるが、これを電気信号によつて機
械的に切替接続する装置、例えば電磁弁２９を設
け、後述する電気信号によつて定常状態で軸密封
装置２をドレンピツトへ接続していたのを軸受排
油戻りラインへ接続できるようにしている。更
に、真空槽８へ密封油を供給する軸受給油ライン
中に、軸受給油圧力調節弁２７を設け、この軸受
給油圧力調節弁２７は、軸受給油圧力調節計１６
と軸受圧力設定切替器１７とによつて軸受給油圧
力調節弁装置３６を構成している。前述の異常検
出回路３０は第２図で後述するように、両密油ポ
ンプ７，２０の異常を検出すると、フラツシング
用ポンプ２５への作動指令３３と、フラツシング
用ドレン弁２８が軸密封装置２を軸受排油戻りラ
インへ接続するよう切替えるための電磁弁２９へ
の指令３４と、軸受給油圧力調節弁装置３６が軸
受給油圧力を所定値にするように軸受圧力設定切
替器１７への動作指令３５とを与えるように構成
されている。 Next, the differences from FIG. 3 will be explained. A pressure relay 18 is installed on the discharge side of the emergency seal oil pump 20.
A signal from this pressure relay 18 or a pressure relay 6 on the discharge side of the regular sealed oil pump 7 is attached.
an abnormality detection circuit 30 that detects an abnormality in both sealed oil pumps 7 and 20 based on the signals from the and pressure relay 18;
It consists of In addition, drain valve 2 for flushing
Reference numeral 8 is a three-way valve, and a device, for example, a solenoid valve 29, is provided to mechanically switch and connect this using an electric signal, and the shaft sealing device 2 is connected to the drain pit in a steady state using an electric signal, which will be described later. It is now possible to connect the previously used bearing oil return line to the bearing drain oil return line. Furthermore, a bearing oil supply pressure regulating valve 27 is provided in the bearing oil supply line that supplies sealing oil to the vacuum tank 8, and this bearing oil supply pressure regulating valve 27 is connected to the bearing oil supply pressure regulator 16.
and the bearing pressure setting switch 17 constitute a bearing oil supply pressure regulating valve device 36. As will be described later with reference to FIG. 2, when the abnormality detection circuit 30 detects an abnormality in both the oil pumps 7 and 20, it issues an operation command 33 to the flushing pump 25 and the flushing drain valve 28 to the shaft sealing device 2. A command 34 to the solenoid valve 29 to connect the bearing oil return line to the bearing drain oil return line, and an operation command to the bearing pressure setting switch 17 so that the bearing oil supply pressure regulating valve device 36 sets the bearing oil supply pressure to a predetermined value. 35.
第１図の定常状態での密封油は、常用密封油ポ
ンプ７…逆止弁５ａ…密封油差圧調節弁４を介し
て軸密封装置２へ供給されている。常用密封油ポ
ンプ７に異常が生じた場合は、圧力継電器６がこ
れを検知し、後述する脈動による誤動作防止用の
遅延回路１９ａを介して非常用密封油ポンプ２０
が起動される。両密封油ポンプ７，２０に異常が
生じた場合は、詳細を後述するがフラツシング用
ポンプ２５を用い、逆止弁１３ｂ、逆止弁１２、
密封油差圧調節弁４を介して軸密封油が供給され
る。 In the steady state shown in FIG. 1, sealing oil is supplied to the shaft sealing device 2 via the regular sealing oil pump 7, the check valve 5a, and the sealing oil differential pressure regulating valve 4. If an abnormality occurs in the regular seal oil pump 7, the pressure relay 6 detects this, and the emergency seal oil pump 20 is activated via a delay circuit 19a for preventing malfunction due to pulsation, which will be described later.
is started. If an abnormality occurs in both sealed oil pumps 7 and 20, the flushing pump 25 will be used and the check valves 13b, 12,
Shaft sealing oil is supplied via the sealing oil differential pressure regulating valve 4 .
今、常用密封油ポンプ７の運転中吐出圧力が低
下すると、圧力継電器６が作動し、第２図に示す
ように異常検出回路３０内の脈動時動作防止用の
遅延継電器１９ａを介して、非常用密封油ポンプ
２０に自動起動指令が与えられる。しかし、何等
かの理由で非常用密封油ポンプ２０の吐出圧力が
低下すると、第１図の圧力継電器１８が作動す
る。通常、この段階は密封油ポンプ７，２０によ
る高圧密封油の供給は不可能となるが、圧力継電
器１８の信号はフラツシング用ポンプ２５の立上
り所要時間を考慮した遅延継電器１９ｂを介して
伝達され、AND回路２１の条件が成立しその出
力はフラツシング用ポンプ２５に信号３３として
与えられて自動起動が行なわれる。AND回路２
１から同時に与えられた信号３４，３５は電磁弁
２９と軸受圧力設定切替器１７に与えられる。フ
ラツシング用ポンプ２５の吐出圧力は、一般に軸
受給油ラインにも供給されるが、軸受給油ポンプ
２４による圧力よりも高いため、軸受給油圧力調
節計１６に軸受圧力設定切替器１７を接続し、所
定の軸受給油圧力が得られるように軸受圧力調節
弁２７にて圧力を一定に制御している。また信号
３４はOR回路３７を介して電磁弁２９に入力さ
れ、電磁弁２９はフラツシング用ドレン弁２８を
切替えて軸密封装置２と軸受排油戻りライン間を
接続する。 Now, when the discharge pressure of the regular sealed oil pump 7 decreases during operation, the pressure relay 6 is activated, and as shown in FIG. An automatic start command is given to the seal oil pump 20. However, if the discharge pressure of the emergency seal oil pump 20 decreases for some reason, the pressure relay 18 shown in FIG. 1 is activated. Normally, at this stage, it is impossible to supply high-pressure sealing oil by the sealing oil pumps 7 and 20, but the signal from the pressure relay 18 is transmitted via a delay relay 19b that takes into account the time required to start up the flushing pump 25. When the conditions of the AND circuit 21 are met, the output thereof is given as a signal 33 to the flushing pump 25 for automatic activation. AND circuit 2
The signals 34 and 35 given simultaneously from 1 are given to the solenoid valve 29 and the bearing pressure setting switch 17. The discharge pressure of the flushing pump 25 is generally also supplied to the bearing oil supply line, but since it is higher than the pressure from the bearing oil supply pump 24, a bearing pressure setting switch 17 is connected to the bearing oil supply pressure regulator 16 to set a predetermined value. The bearing pressure control valve 27 controls the pressure to be constant so that the bearing oil supply pressure is obtained. Further, the signal 34 is input to the solenoid valve 29 via the OR circuit 37, and the solenoid valve 29 switches the flushing drain valve 28 to connect the shaft sealing device 2 and the bearing drain oil return line.
こうした非常運転とは別に、据付時あるいは定
期点検時、配管および各装置内のフラツシングを
行なうが、このとき電磁弁２９の消磁によりフラ
ツシング用ドレン弁２８を開いて軸密封装置２と
ドレンピツト間を接続する。 Apart from such emergency operation, during installation or periodic inspection, the pipes and inside of each device are flushed. At this time, the flushing drain valve 28 is opened by demagnetizing the solenoid valve 29 to connect the shaft sealing device 2 and the drain pit. do.
以上説明したように本発明は、常用および非常
用密封油ポンプに異常が生じた場合、異常判定回
路によつてフラツシング油ポンプを起動し密封油
として供給するようにし、また軸受給油ライン中
に異常判定回路の検出によつて動作して所定の軸
受供給圧力を得るよう動作する軸受給油圧力調節
弁装置を設けたため、タービン発電機の機内水素
ガス圧力に見合つた密封油圧力を得ることがで
き、タービン発電機の負荷を低下してタービンラ
ンバツクすることなく正常な運転を継続させるこ
とができる。従つて、安全に運転を継続して信頼
性の向上と共に送電電力の変動を無くすことがで
きる。
As explained above, in the present invention, when an abnormality occurs in the regular and emergency sealing oil pumps, the flushing oil pump is activated by the abnormality determination circuit to supply sealing oil, and also when there is an abnormality in the bearing oil supply line. Since a bearing oil supply pressure regulating valve device is provided that operates based on the detection of the determination circuit to obtain a predetermined bearing supply pressure, it is possible to obtain a sealing oil pressure commensurate with the in-machine hydrogen gas pressure of the turbine generator. It is possible to reduce the load on the turbine generator and continue normal operation without causing the turbine to run back. Therefore, it is possible to safely continue operation, improve reliability, and eliminate fluctuations in transmitted power.
第１図は本発明の一実施例による軸密封油装置
の系統図、第２図は第１図の異常判定回路の回路
図、第３図は従来の軸密封油装置の系統図であ
る。
２……軸密封装置、３……軸受、４……密封油
差圧調節弁、７……常用密封油ポンプ、１８……
圧力継電器、２０……非常用密封油ポンプ、２４
……軸受給油ポンプ、２５……フラツシング油ポ
ンプ、２８……フラツシング用ドレン弁、２９…
…電磁弁、３０……異常判定回路、３６……軸受
給油圧力調節弁装置。
FIG. 1 is a system diagram of a shaft seal oil device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the abnormality determination circuit of FIG. 1, and FIG. 3 is a system diagram of a conventional shaft seal oil device. 2... Shaft sealing device, 3... Bearing, 4... Seal oil differential pressure control valve, 7... Regular seal oil pump, 18...
Pressure relay, 20...Emergency seal oil pump, 24
... Bearing oil supply pump, 25 ... Flushing oil pump, 28 ... Drain valve for flushing, 29 ...
... Solenoid valve, 30 ... Abnormality determination circuit, 36 ... Bearing oil supply pressure control valve device.
Claims (1)
ング油ポンプを連導する常用および非常用密封油
ポンプと、上記軸受給油ポンプと上記フラツシン
グ油ポンプに接続された軸受給油ラインと、上記
タービン発電機の軸受排油戻りラインの途中に設
けたフラツシング用ドレン弁とを有するタービン
発電機の軸密封油装置において、上記常用および
非常用密封油ポンプの異常を検出する異常判定回
路を設け、この異常判定回路の検出によつて上記
フラツシング油ポンプを起動するように構成し、
上記異常判定回路の検出により、上記フラツシン
グ用ドレン弁を上記軸受排油戻りラインに切替え
接続する装置および上記軸受給油ライン中に設け
られて所定の軸受給油圧力を得る軸受給油圧力調
節弁装置を設けたことを特徴とするタービン発電
機の軸密封油装置。 ２ 上記特許請求の範囲第１項記載のものにおい
て、上記異常判定回路は、上記非常用密封油ポン
プの吐出圧力を検出する圧力継電器と、密封油の
脈動による上記圧力継電器によつて動作するのを
防ぐ遅延継電器とを有することを特徴とするター
ビン発電機の軸密封油装置。[Scope of Claims] 1. Regular and emergency seal oil pumps that connect the bearing oil supply pump and flushing oil pump of the turbine generator, a bearing oil supply line that is connected to the bearing oil supply pump and the flushing oil pump, and the above-mentioned In a shaft sealing oil system for a turbine generator having a flushing drain valve provided in the middle of a bearing drain oil return line of the turbine generator, an abnormality determination circuit is provided to detect abnormalities in the regular and emergency sealing oil pumps, The flushing oil pump is configured to start based on the detection of this abnormality determination circuit,
A device for switching and connecting the flushing drain valve to the bearing drain oil return line upon detection by the abnormality determination circuit, and a bearing oil supply pressure regulating valve device installed in the bearing oil supply line to obtain a predetermined bearing oil supply pressure are provided. A shaft sealing oil device for a turbine generator, characterized by: 2. In the device described in claim 1, the abnormality determination circuit is operated by a pressure relay that detects the discharge pressure of the emergency seal oil pump and a pressure relay that detects the pulsation of the seal oil. A shaft sealing oil device for a turbine generator, characterized in that it has a delay relay that prevents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21975286A JPS6377340A (en) | 1986-09-19 | 1986-09-19 | Shaft seal oil device for turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21975286A JPS6377340A (en) | 1986-09-19 | 1986-09-19 | Shaft seal oil device for turbine generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6377340A JPS6377340A (en) | 1988-04-07 |
| JPH0564016B2 true JPH0564016B2 (en) | 1993-09-13 |
Family
ID=16740443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21975286A Granted JPS6377340A (en) | 1986-09-19 | 1986-09-19 | Shaft seal oil device for turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6377340A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5034638A (en) * | 1990-03-14 | 1991-07-23 | Westinghouse Electric Corp. | Generator auxiliary mode lubrication system and method |
-
1986
- 1986-09-19 JP JP21975286A patent/JPS6377340A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6377340A (en) | 1988-04-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |