JPH04153502A - Expansion turbine protector - Google Patents
Expansion turbine protectorInfo
- Publication number
- JPH04153502A JPH04153502A JP27633190A JP27633190A JPH04153502A JP H04153502 A JPH04153502 A JP H04153502A JP 27633190 A JP27633190 A JP 27633190A JP 27633190 A JP27633190 A JP 27633190A JP H04153502 A JPH04153502 A JP H04153502A
- Authority
- JP
- Japan
- Prior art keywords
- tachometer
- turbine
- value
- expansion turbine
- specified value
- 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.)
- Pending
Links
- 230000001012 protector Effects 0.000 title 1
- 238000000034 method Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 abstract description 4
- 230000005856 abnormality Effects 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101001125878 Autographa californica nuclear polyhedrosis virus Per os infectivity factor 2 Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
Abstract
Description
【発明の詳細な説明】 〔ｆ葉上の利用分野〕 本発明は膨張タービンの保護ＭＷに関するものである。[Detailed description of the invention] [Usage field on f leaf] The present invention relates to a protective MW of an expansion turbine.
膨張ターピノの保護システムの一つとして一般に使用さ
れるのは、過速度回転時にタービン入口弁を閉にするシ
ステムである。従来、このシステムにおいて、回転針か
らの出力が興！（過速度回転等）であればタービン入口
弁を閉としている。One commonly used protection system for expansion turpinoes is a system that closes the turbine inlet valve during overspeed rotation. Conventionally, in this system, the output from the rotating needle was (overspeed rotation, etc.), the turbine inlet valve is closed.
なお、この種の装置として関連するものには。In addition, related to this type of device.
例えば、特開昭６ｌ−２４３２５８４ｉ！公報等が挙げ
られる。For example, JP-A-6L-2432584i! Examples include public notices, etc.
〔発明が解決しようとするａｊＩＩｌ〕上記従来技術で
は、回転計本体に起因するトラブルの内、センサー先１
ａ部の破損による断線、謹るいは、トリガーレベル設定
不良、センサー段重隙間不良等においては異常信号では
なく回転数力Ｏｒｐｍの指示をするものもある。[AjIIl to be solved by the invention] In the above conventional technology, among the troubles caused by the tachometer body, the sensor point 1
In some cases, such as disconnection due to damage to part a, faulty trigger level setting, faulty sensor stage clearance, etc., an instruction is given to the rotational speed force Orpm instead of an abnormal signal.
このようなトラブルを有している回転計な彫りタービン
保瞳システムに採用すると、過速度回転になつても１回
転計指示はＯｒｐｍのままであるからタービン入口弁閉
の停止システムが作動せず４回転により膨張タービンを
損傷することがある。If this system is applied to a tachometer-carved turbine keeping system that has such troubles, the tachometer indication will remain at Orpm even if it rotates at overspeed, so the stop system that closes the turbine inlet valve will not operate. Four revolutions can damage the expansion turbine.
本発明の目的は、回転計システムが不良となった場合に
おいても、回転計により制御を行っている膨張タービン
が過速度回転することなく停止、又は低速回転する膨張
タービン保護装置を提供することにある。An object of the present invention is to provide an expansion turbine protection device that allows an expansion turbine controlled by a tachometer to stop or rotate at a low speed without overspeeding even if the tachometer system becomes defective. be.
〔１ＩｉＩを解決するための手段〕
上記目的を達成するために、タービン入口と出口の圧力
を圧力計で測定し、この圧力差が規定値以上で、なおか
つ回転計の回転数指示が規定値以下であれば回転計異常
を出力し、タービン入口弁を全閉にするか又は規定の最
少開度に保持する制御手段を有するものである。[Means for solving 1IiI] In order to achieve the above objective, the pressure at the turbine inlet and outlet is measured with a pressure gauge, and the pressure difference is above a specified value, and the rotation speed indication on the tachometer is below the specified value. If so, it has a control means that outputs a tachometer abnormality and either fully closes the turbine inlet valve or maintains it at a specified minimum opening.
また、タービンに流れている流量を測定し、この流量が
規定値以上で、なおわつ回転数指示が規定値以下であれ
ば回転計異常を出力し、タービン入口弁な全閉にするか
又は規定の最少開度に保持するものである。In addition, the flow rate flowing into the turbine is measured, and if this flow rate is above the specified value and the rotation speed indication is below the specified value, a tachometer error is output and the turbine inlet valve is fully closed or This is to maintain the specified minimum opening.
また、タービン回転軸の軸振動を検出し、この振動値が
規定値以上で、なおかつ回転数指示が規定値以下であれ
ば回転計異常を出力し、タービン入口弁を全閉にするか
又は規定の最少開度に保持するものである。In addition, shaft vibration of the turbine rotating shaft is detected, and if this vibration value is above a specified value and the rotation speed indication is below the specified value, a tachometer error is output, and the turbine inlet valve is fully closed or set as specified. The valve is held at the minimum opening degree.
膨張タービンが回転を始める条件として、まずタービン
翼車内へプロセスガスが導かれることが必要である。タ
ービン翼車内での断熱ｊｌ侵エネルギーは、タービンの
出入口圧力差が大きくなれば、処理ガス流量も増加する
ので大きくなり、回転数も上昇する。上記の点を考慮し
、膨張タービンが低速回転を始める時のタービン出入口
圧力を事前に確認しておき、これを規定値（Ｌｐ）とし
てこの圧力差以上でなおかつ、回転数指示が規定ｔＩＬ
（例えば０．ｒｐｍ）以下の場合には回転計異常を出力
し、タービン入口弁を全閉にするか、又はタービン入口
弁を規定の最少開度に保持する。As a condition for the expansion turbine to start rotating, it is first necessary that process gas be introduced into the turbine wheel. As the pressure difference between the inlet and the outlet of the turbine increases, the flow rate of the processing gas also increases, so the adiabatic erosive energy inside the turbine blade wheel increases, and the rotational speed also increases. Considering the above points, check in advance the turbine inlet and outlet pressures when the expansion turbine starts rotating at low speed, and set this as the specified value (Lp).
(for example, 0.rpm) or less, outputs a tachometer abnormality and either fully closes the turbine inlet valve or maintains the turbine inlet valve at a specified minimum opening.
または、低速回転を始める時のタービン流量を事前にＪ
１認し、これを規定値（ＬＱ）として、上記と同様の動
作をする。Alternatively, you can set the turbine flow rate to J in advance when starting low-speed rotation.
1 is recognized, this is set as the specified value (LQ), and the same operation as above is performed.
覧たは、低速回転時の軸振動値を事前に確認し、これを
規定値（Ｌｖ ）として、上記と同様の動作をする。Alternatively, check the shaft vibration value during low speed rotation in advance, set this as the specified value (Lv), and perform the same operation as above.
以上の如く、動作するので、回転計本体に不良が生じ回
転数指示（出力信号）が０ｒｐｔｏとなっても、タービ
ンが回転する可能性がある条件（タービン出入口差、タ
ービン流量、軸振動）が成立している場合は、回転計の
指示を異常とみなしタービン入口弁を全閉か、又は規定
の最少開度に保持するため、過速度回転になることはな
い。As it operates as described above, even if there is a defect in the tachometer body and the rotation speed indication (output signal) becomes 0 rpm, the conditions that may cause the turbine to rotate (turbine entrance and exit difference, turbine flow rate, shaft vibration) are maintained. If this is true, the tachometer reading is considered abnormal and the turbine inlet valve is kept fully closed or at the specified minimum opening, so overspeed rotation will not occur.
以下、本発明の一実施例を第１図およびｊｆｉＺ図によ
り説明する。An embodiment of the present invention will be described below with reference to FIG. 1 and a jfiZ diagram.
まず構成について説明する。膨張タービン翼車１は回転
軸２、減速１！１３、発電後４と連結される。First, the configuration will be explained. The expansion turbine wheel 1 is connected to a rotating shaft 2, a speed reducer 1!13, and a power generator 4.
タービンのプロセスガス入口部には、タービン入口弁５
、入口圧力計７、入口ａ置針８、可変ノズル機構６が設
けられている。プロセスガス出口側には出口圧力計Ｕが
設けられている。また回転軸には非接触型の回転計１０
、振動計９が８＆すられ、これらの計器類からの信号は
−」御器臆に伝えられる。A turbine inlet valve 5 is installed at the process gas inlet of the turbine.
, an inlet pressure gauge 7, an inlet a positioner 8, and a variable nozzle mechanism 6 are provided. An outlet pressure gauge U is provided on the process gas outlet side. In addition, there is a non-contact tachometer 10 on the rotating shaft.
, the vibrometer 9 is run 8&, and the signals from these instruments are transmitted to the instrument.
次−こ動作について説明する。The next-this operation will be explained.
可変ノズル機構６を最小規定開度（５〜２ｏチ程度）ま
で開けた後、タービン入口弁５を開はタービンを回転さ
せる。回転計Ｗの指示値が規定値（例えばＯｒｐｍ ）
以下であっても、タービンの出入口圧力計７．１１の差
圧（ＰＩＦ２）が規定値以上、又はタービン処理ガス流
量計８の指示値が規定値以上、又は軸振動値が規定値以
上であれば。After the variable nozzle mechanism 6 is opened to the minimum prescribed opening degree (approximately 5 to 2 degrees), the turbine inlet valve 5 is opened to rotate the turbine. The indicated value of the tachometer W is the specified value (for example Orpm)
Even if the differential pressure (PIF2) of the turbine inlet and outlet pressure gauges 7.11 is above the specified value, or the indicated value of the turbine processing gas flow meter 8 is above the specified value, or the shaft vibration value is above the specified value, even if Ba.
回転計の誤指示とみなし、タービン入口弁５を全閉にす
るか、あるいは可変ノズル機構６を最小規定開度にする
。It is assumed that the tachometer has erroneously indicated, and the turbine inlet valve 5 is fully closed, or the variable nozzle mechanism 6 is set to the minimum prescribed opening degree.
回転計１０の指示値が規定値（ＬＬ） を超えている
場合は可変ノズル機構６の開度な徐々に上昇させ膨張タ
ービンの回転数を上昇させる。発電機４は１回転計Ｗの
指示値が同期速度になった時点で電源が投入され発電を
開始するので、膨張タービンの回転数は一定となる。ま
た電源不良により同期ｊ！度を超えてホバースピード（
ＨＨ）になった場合も、インターロックシステムが作動
しタービン入口弁が全閉となる。If the indicated value of the tachometer 10 exceeds the specified value (LL), the opening of the variable nozzle mechanism 6 is gradually increased to increase the rotational speed of the expansion turbine. Since the generator 4 is powered on and starts generating electricity when the indicated value of the 1-tachometer W reaches the synchronous speed, the rotational speed of the expansion turbine becomes constant. Also, due to a power failure, the synchronization j! Exceeding hover speed (
HH), the interlock system is activated and the turbine inlet valve is fully closed.
第２図は制御器りの論理回路を示しており、タービン出
入口圧力差、タービン処理ガス流量、軸振動値、の三つ
の内いずれか一つが規定値より大で、かつ回転数指示が
規定値より４１であれば、回転計誤指示とみなし保護シ
ステムが作動することを示している。また、回転数が規
定値（）ＩＨ）を超えてオーバースピードになった場合
にも、この保護システムが作動する。Figure 2 shows the logic circuit of the controller, and shows that any one of the following three factors: pressure difference at the turbine inlet and outlet, turbine processing gas flow rate, and shaft vibration value is greater than the specified value, and the rotation speed instruction is at the specified value. If the number is 41, it is assumed that the tachometer has erroneously indicated and the protection system is activated. This protection system is also activated when the rotational speed exceeds the specified value (IH) and becomes overspeed.
従って、上記の実施例では、タービン出入口圧力差、タ
ービン処理ガス流量、軸振動値の三つを測定しているが
、いずれか一つを測定し同様のシステムを構成すること
もできる。Therefore, in the above embodiment, three of the following are measured: the turbine inlet and outlet pressure difference, the turbine processing gas flow rate, and the shaft vibration value, but a similar system may be constructed by measuring any one of them.
また、制動方式としてコンプレッサー翼車を回転軸の他
端に装着したタービンの保護装置としても利用できる。It can also be used as a protection device for a turbine that has a compressor wheel attached to the other end of the rotating shaft as a braking system.
本実施例によれば、回転計本体の不良により、回転数指
示が０ｒｐｔｎとなった場合に、タービン入口弁が全閉
、又は最小規定開度になり、また可変ノズルを最小規定
関度口するため１回転数が過速度となることを防ぐこと
ができる。According to this embodiment, when the rotation speed indication becomes 0 rpm due to a defect in the tachometer body, the turbine inlet valve is fully closed or reaches the minimum specified opening, and the variable nozzle is opened at the minimum specified opening. Therefore, it is possible to prevent the number of rotations from becoming overspeed.
本発明によれば、回転計システムが不良となった場合１
こおいても、回転計により制御を行っている膨張タービ
ンが過速度回転することなく停止、又は低速回転させる
二とができるので、膨張ター施例のフローを示す図、第
２図はｊ１１図に示される制御器内の論理構成を示す図
である。According to the present invention, if the tachometer system becomes defective, 1
In this case as well, the expansion turbine, which is controlled by the tachometer, can be stopped without overspeeding or rotated at low speed. FIG. 2 is a diagram showing a logical configuration within the controller shown in FIG.
ｌ・−・・・・タービン翼車、４・・・・・・発電機、
５・・曲タービン入口弁、
６ ・−・・・・
ｏＪ変ノズルＩＩ！構、
７・・・・・・入
ロ圧力針、
８・・・・・・流量針、
９・・・・・・Ｓ、１ＩＩＪ計、
イ
！
閃l... Turbine wheel, 4... Generator,
5... Curved turbine inlet valve, 6... oJ bent nozzle II! Structure, 7...Input pressure needle, 8...Flow rate needle, 9...S, 1IIJ meter, A! flash
Claims (1)
寒冷を発生する膨張タービンにおいて、前記タービン翼
車の出入口側に圧力計を設けるとともに、前記膨張ター
ビンの回転数を検出する回転計を設け、前記圧力計で検
出した圧力差が規定値以上で、前記回転計の出力値が規
定値以下であれば、回転計異常と判断し信号を出力し、
タービン入口弁を遮断又は規定の最少開度に保持制御手
段を有することを特徴とする膨張タービン保護装置。 ２、前記１項記載の膨張タービン保護装置において、膨
張タービン出入口側に設けた圧力計に替えて、タービン
流量計を設け、該流量計の指示値が規定値以上で、前記
回転計の出力値が規定値以下であれば、同様の作動を行
う膨張タービン保護装置。 ３、前記１項記載の膨張タービン保護装置においいて、
膨張タービン出入口側に設けた圧力計に替えて、回転軸
の軸振動検出用振動計を設け、振動値が規定値以上で、
前記回転計の出力値が規定値以下であれば、同様の作動
を行う膨張タービン保護装置。[Claims] 1. Expanding high-pressure process gas in a turbine wheel;
In an expansion turbine that generates cold, a pressure gauge is provided on the entrance and exit side of the turbine impeller, and a tachometer is provided to detect the rotation speed of the expansion turbine, and when the pressure difference detected by the pressure gauge is equal to or higher than a specified value, If the output value of the tachometer is below the specified value, it is determined that the tachometer is abnormal and a signal is output;
An expansion turbine protection device comprising a control means for shutting off or maintaining a turbine inlet valve at a predetermined minimum opening. 2. In the expansion turbine protection device according to item 1 above, a turbine flow meter is provided in place of the pressure gauge provided on the expansion turbine inlet/outlet side, and when the indicated value of the flow meter is equal to or higher than a specified value, the output value of the tachometer is Expansion turbine protection device that performs the same operation if is below the specified value. 3. In the expansion turbine protection device according to item 1 above,
In place of the pressure gauge installed on the expansion turbine inlet/outlet side, a vibration meter is installed to detect shaft vibration of the rotating shaft, and when the vibration value exceeds the specified value,
An expansion turbine protection device that performs a similar operation if the output value of the tachometer is below a specified value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27633190A JPH04153502A (en) | 1990-10-17 | 1990-10-17 | Expansion turbine protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27633190A JPH04153502A (en) | 1990-10-17 | 1990-10-17 | Expansion turbine protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04153502A true JPH04153502A (en) | 1992-05-27 |
Family
ID=17567959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27633190A Pending JPH04153502A (en) | 1990-10-17 | 1990-10-17 | Expansion turbine protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04153502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014047729A (en) * | 2012-08-31 | 2014-03-17 | Mitsubishi Heavy Ind Ltd | Internal combustion engine system, ship including the same, and method of controlling internal combustion engine system |
-
1990
- 1990-10-17 JP JP27633190A patent/JPH04153502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014047729A (en) * | 2012-08-31 | 2014-03-17 | Mitsubishi Heavy Ind Ltd | Internal combustion engine system, ship including the same, and method of controlling internal combustion engine system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8152496B2 (en) | Continuing compressor operation through redundant algorithms | |
| US8342794B2 (en) | Stall and surge detection system and method | |
| US3868625A (en) | Surge indicator for turbine engines | |
| US4454754A (en) | Engine failure detector | |
| JP2008261335A (en) | Turbomachine | |
| JPH0561479B2 (en) | ||
| US10082445B2 (en) | Method for monitoring the change in state of a valve by measuring pressure | |
| JP6005181B2 (en) | Preventing pump surging in compressors | |
| JP5471407B2 (en) | Vibration monitoring device for rotating body | |
| RU2634993C1 (en) | Method to detect valve failure in gas turbine engine | |
| KR102241902B1 (en) | Starter issue detection | |
| JPH04153502A (en) | Expansion turbine protector | |
| US2929547A (en) | Method and apparatus for detection and prevention of overspeed and surge conditions in a compressor | |
| RU2602644C1 (en) | Method for protection of dual-frow turbojet engine against low pressure turbine spin-up | |
| Boyer et al. | Stall inception in single stage, high-speed compressors with straight and swept leading edges | |
| Madhavan et al. | Rotating stall caused by pressure surface flow separation on centrifugal fan blades | |
| US6075685A (en) | Speed protection system for a machine and a method thereof | |
| EP0573186B1 (en) | Control device for a gas turbine system and control method therefor | |
| JPH02286899A (en) | Stall predicting and preventing device for turbo machine | |
| JPH10339663A (en) | Method for triggering protective means at time of vibration generation of rotating apparatus | |
| RU2214535C2 (en) | Method to control bypass of air in compressor of two-shaft by-pass gas-turbine engine | |
| JP3110258B2 (en) | Surge detector with asymmetric centrifugal compressor diffuser | |
| JP4184849B2 (en) | Steam turbine ship main turbine warm-up / warm-pipe system and warm-up / warm-pipe method | |
| Serena et al. | Experimental Characterization of a Centrifugal Compressor in Second Quadrant Operation | |
| JPS60111093A (en) | Surging preventing apparatus for axial-flow compressor |