JPH06101499A - Starting method for gas bearing turbine - Google Patents
Starting method for gas bearing turbineInfo
- Publication number
- JPH06101499A JPH06101499A JP24960192A JP24960192A JPH06101499A JP H06101499 A JPH06101499 A JP H06101499A JP 24960192 A JP24960192 A JP 24960192A JP 24960192 A JP24960192 A JP 24960192A JP H06101499 A JPH06101499 A JP H06101499A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- turbine
- gas
- starting
- valve
- 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
Landscapes
- Separation By Low-Temperature Treatments (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気分離装置，窒素発生
装置…等の低温装置に使用されているガス軸受タービン
の起動方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting a gas bearing turbine used in a low temperature device such as an air separation device, a nitrogen generation device.
【０００２】[0002]
【従来の技術】ガス軸受タービンの軸受排気ガスを有効
利用する従来技術としては、例えば、特公昭６２−０４
６７８５号公報に掲載されている。これは軸受部に供給
された後で外部に排気される軸受ガスを制動ファンの吸
入側に供給したものである。この従来技術の目的は、軸
受ガスが停止した場合に排気ラインから大気の湿気が軸
受内に入り込む恐れを防ぐこと、また制動ガスの温度上
昇を防ぐことである。2. Description of the Related Art As a conventional technique for effectively utilizing the bearing exhaust gas of a gas bearing turbine, for example, Japanese Patent Publication No. 62-04.
6785. In this, the bearing gas, which is supplied to the bearing portion and then exhausted to the outside, is supplied to the suction side of the braking fan. The purpose of this prior art is to prevent the risk of atmospheric humidity entering the bearing from the exhaust line when the bearing gas is stopped, and to prevent the temperature rise of the braking gas.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術のガス軸
受タービンは、軸受ガスにドライな圧縮ガスを用いてお
り、潤滑油を使用した場合のように、プロセス中へ油分
の混入などの汚染の心配がなく利用範囲は近年徐々に拡
大している。しかし、油軸受に比べ軸受剛性が小さく、
外乱による軸受損傷を生じやすい欠点もある。このため
上記公知例の如くタービン保護装置を設置することが慎
重に検討される。特に、軸受部へゴミや水分が入った状
態で、タービンを高速回転すると瞬時に軸受の焼付を生
じる可能性がある。このようなトラブルは特にタービン
起動時に多く発生している。The above-mentioned conventional gas bearing turbine uses the dry compressed gas as the bearing gas, and as in the case of using the lubricating oil, contamination such as mixing of oil component in the process is caused. There are no worries and the range of use has expanded gradually in recent years. However, bearing rigidity is smaller than that of oil bearings,
There is also a drawback that bearing damage is likely to occur due to disturbance. For this reason, it is carefully considered to install the turbine protection device as in the above-mentioned known example. In particular, when the turbine is rotated at a high speed in a state where dust or water is contained in the bearing portion, seizure of the bearing may occur instantly. Such troubles often occur especially when the turbine is started.
【０００４】本発明の目的は、ガス軸受タービンの回転
軸が軸受ガスにより正常に浮上したことを確認した後、
起動操作を行うことにより軸受損傷等のタービン起動時
のトラブルを防止するガス軸受タービンの起動方法を提
供することにある。An object of the present invention is to confirm that the rotating shaft of a gas bearing turbine has normally levitated by the bearing gas, and
It is an object of the present invention to provide a method for starting a gas bearing turbine that prevents troubles such as bearing damage at the time of starting the turbine by performing a starting operation.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、軸受部へ供給された後外部へ排気される軸受ガス
を、タービン入口に導きタービン起動用のガスとして利
用する手段と、タービンが低速でスムースに回転するこ
とを確認する手段と、この確認後タービン起動操作を次
のステップに移行させる手段とを設けるようにしたもの
である。In order to achieve the above object, a means for guiding a bearing gas, which is supplied to the bearing portion and then exhausted to the outside, to a turbine inlet and utilizing it as a gas for starting a turbine, and a low speed turbine. Thus, a means for confirming that the turbine rotates smoothly and a means for shifting the turbine starting operation to the next step after the confirmation are provided.
【０００６】[0006]
【作用】上記各手段を設けることにより、軸受ガスによ
りタービンの回転軸が正常に浮上し、排気ガスがタービ
ン入口へ導かれ、タービン翼車を通過する。この排気ガ
スのエネルギーによりタービンは低速回転し、これを回
転数検出器で検知することによりタービンが正常に浮上
していることを判断する。この判断により、次の起動操
作ステップに移行し、タービン入口弁を開きタービンを
定格回転数まで上昇させる。By providing each of the above means, the rotating shaft of the turbine is normally levitated by the bearing gas, the exhaust gas is guided to the turbine inlet, and passes through the turbine impeller. The energy of the exhaust gas causes the turbine to rotate at a low speed, and the rotation speed detector detects this to determine that the turbine is normally flying. Based on this determination, the process proceeds to the next starting operation step, the turbine inlet valve is opened, and the turbine is raised to the rated speed.
【０００７】なを、排気ガスのエネルギーでタービンの
回転数が規定値に達しない場合タービンは正常に浮上し
ていないと判断し、起動操作の次のステップへ移行しな
い。If the turbine speed does not reach the specified value due to the energy of the exhaust gas, it is determined that the turbine is not flying normally, and the process does not proceed to the next step of the starting operation.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１により説明す
る。まず構成について述べる。図１において、１は制動
ファン，２はガス軸受，３は回転軸，４はタービン翼
車，５はタービン入口弁，６はタービン出口ライン，７
は起動弁，８は軸受ガス供給弁，９は軸受ガス排気弁，
１０は冷却器，１１は制御弁，１２は軸受ガス排気ライ
ン，１３は回転数検出器，１４は軸受ガス供給圧力検出
器，１５は制御器，１６は制御器への入力信号，１７は
制御器からの出力信号。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. First, the configuration will be described. In FIG. 1, 1 is a braking fan, 2 is a gas bearing, 3 is a rotating shaft, 4 is a turbine impeller, 5 is a turbine inlet valve, 6 is a turbine outlet line, and 7 is a turbine outlet line.
Is a starting valve, 8 is a bearing gas supply valve, 9 is a bearing gas exhaust valve,
10 is a cooler, 11 is a control valve, 12 is a bearing gas exhaust line, 13 is a rotation speed detector, 14 is a bearing gas supply pressure detector, 15 is a controller, 16 is an input signal to the controller, 17 is a control Output signal from the vessel.
【０００９】次に動作について述べる。起動操作として
まず入口弁が閉であることが確認される。次に高圧の軸
受ガスは、軸受ガス供給弁８よりガス軸受２ａ，ｂへ供
給される。ガス軸受２ａ，ｂで回転軸３を浮上させた
後、低圧のガスとなって一部は排気ライン１２を通り制
動ファン１の吸込部へ導かれる。残りの流れは、起動弁
７を通りタービン入口よりタービン翼車４へ導かれた
後、タービンを回転させタービン出口ライン６へ流れ
る。制動ガスは、タービンの回転により循環を始め制動
ファン１で昇圧された後、冷却器１０で冷却され再び制
動ファン１の吸込部へ戻る。冷却器１０出口に設けられ
た制動弁１１により回転数を制御する。また、軸受排気
ライン１２により、制動ガスラインに供給された排気ガ
スは、制動ファン１を通った後、軸受排気弁９より排気
される。回転数は回転数検出器１３により検出され、ま
た軸受ガス供給圧力は、圧力検出器１４により検出され
それぞれ出力信号１６ａ，ｂを制御器１５へ伝達する。Next, the operation will be described. As a starting operation, it is first confirmed that the inlet valve is closed. Next, the high pressure bearing gas is supplied from the bearing gas supply valve 8 to the gas bearings 2a and 2b. After the rotating shaft 3 is levitated by the gas bearings 2a and 2b, it becomes low-pressure gas, and a part of it is guided to the suction part of the braking fan 1 through the exhaust line 12. The remaining flow is guided to the turbine wheel 4 from the turbine inlet through the start valve 7 and then rotates the turbine to flow to the turbine outlet line 6. The braking gas begins to circulate due to the rotation of the turbine, is pressurized by the braking fan 1, is cooled by the cooler 10, and then returns to the suction portion of the braking fan 1 again. The rotation speed is controlled by a braking valve 11 provided at the outlet of the cooler 10. Further, the exhaust gas supplied to the braking gas line by the bearing exhaust line 12 is exhausted from the bearing exhaust valve 9 after passing through the braking fan 1. The rotation speed is detected by the rotation speed detector 13, and the bearing gas supply pressure is detected by the pressure detector 14, and output signals 16a and 16b are transmitted to the controller 15, respectively.
【００１０】起動操作の第１ステップとして軸受ガス圧
力を規定値まで上昇させ、上記動作によりタービンを低
速回転させる。軸受ガス供給圧力及び回転数が規定値で
あれば、制御器１５により回転軸は正常に浮上している
と判断する。次に第２ステップとして制御器１５より操
作信号を出し、起動弁７を閉とし、さらにタービン入口
弁５を除開し、タービンを定格回転数まで上昇させる。As the first step of the starting operation, the bearing gas pressure is raised to a specified value, and the turbine is rotated at a low speed by the above operation. If the bearing gas supply pressure and the rotational speed are specified values, the controller 15 determines that the rotating shaft is normally levitated. Next, as a second step, an operation signal is issued from the controller 15, the starting valve 7 is closed, the turbine inlet valve 5 is further opened, and the turbine is raised to the rated speed.
【００１１】なお、本実施例では、回転数検出器を用い
ているか、回転数検出器の代りに軸振動検出器を設ける
場合も同様の制御が可能である。本実施例の第１ステッ
プにおいて、軸受部にゴミや水分…等の異物が混入して
いた場合、軸受排気ガスではエネルギーが小さくタービ
ンはほとんど回転しない。従って、第２ステップに移行
できないので軸受損傷や回転体損傷を防止することがで
きる。In this embodiment, the same control can be performed when the rotation speed detector is used or when a shaft vibration detector is provided instead of the rotation speed detector. In the first step of this embodiment, if foreign matter such as dust or water is mixed in the bearing portion, the energy of the bearing exhaust gas is small and the turbine hardly rotates. Therefore, since it is not possible to move to the second step, it is possible to prevent bearing damage and rotor damage.
【００１２】[0012]
【発明の効果】本発明により、回転軸が規定軸受により
正常に浮上したことを確認し、タービンの起動操作が行
なわれるため、起動時の軸受損傷等のトラブルが防止で
きる。According to the present invention, since it is confirmed that the rotary shaft has normally levitated by the specified bearing and the turbine is started up, troubles such as bearing damage at startup can be prevented.
【００１３】また、軸受排気ガス９を全閉にし、軸受ガ
スを全量タービン側へ導くことにより、タービン翼車部
の加温操作も可能となる。Further, by fully closing the bearing exhaust gas 9 and guiding all the bearing gas to the turbine side, it is possible to heat the turbine impeller.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.
１…制動ファン、２ａ，２ｂ…ガス軸受、３…回転軸、
４…タービン翼車 ５……タービン入口弁、６…タービン出口ライン、７…
起動用弁、８…軸受ガス供給弁、９…軸受ガス排気弁、
１０…冷却器、１１…制動弁、１２…軸受ガス排気ライ
ン、１３…回転数検出器、１４…圧力検出器、１５……
制御器、１６…入力信号、１７…出力信号。1 ... Braking fan, 2a, 2b ... Gas bearing, 3 ... Rotating shaft,
4 ... Turbine impeller 5 ... Turbine inlet valve, 6 ... Turbine outlet line, 7 ...
Starting valve, 8 ... Bearing gas supply valve, 9 ... Bearing gas exhaust valve,
10 ... Cooler, 11 ... Braking valve, 12 ... Bearing gas exhaust line, 13 ... Rotation speed detector, 14 ... Pressure detector, 15 ...
Controller, 16 ... Input signal, 17 ... Output signal.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 橋本 一孝 山口県下松市大字東豊井794番地 株式会 社日立製作所笠戸工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazutaka Hashimoto 794 Azuma Higashitoyo, Kudamatsu City, Yamaguchi Prefecture Stock Company Hitachi Ltd. Kasado Plant
Claims (1)
転軸を浮上させる静圧型気体軸受を用いた低温装置等の
ガス軸受タービンの起動方法において、軸受部に供給さ
れた後外部へ排気される軸受ガスをタービン起動用のガ
スとして使用することを特徴とするガス軸受タービンの
起動方法1. In a method for starting a gas bearing turbine such as a low temperature device using a static pressure type gas bearing in which a rotary shaft is levitated by supplying a high pressure bearing gas, the gas bearing turbine is supplied to a bearing portion and then exhausted to the outside. Method for starting a gas bearing turbine, characterized in that the bearing gas is used as a gas for starting the turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24960192A JPH06101499A (en) | 1992-09-18 | 1992-09-18 | Starting method for gas bearing turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24960192A JPH06101499A (en) | 1992-09-18 | 1992-09-18 | Starting method for gas bearing turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06101499A true JPH06101499A (en) | 1994-04-12 |
Family
ID=17195450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24960192A Pending JPH06101499A (en) | 1992-09-18 | 1992-09-18 | Starting method for gas bearing turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06101499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200033551A (en) * | 2018-09-20 | 2020-03-30 | 한국생산기술연구원 | Rankine cycle power generation and its operation method |
| WO2020148010A1 (en) * | 2019-01-16 | 2020-07-23 | Robert Bosch Gmbh | Fuel cell system |
-
1992
- 1992-09-18 JP JP24960192A patent/JPH06101499A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200033551A (en) * | 2018-09-20 | 2020-03-30 | 한국생산기술연구원 | Rankine cycle power generation and its operation method |
| WO2020148010A1 (en) * | 2019-01-16 | 2020-07-23 | Robert Bosch Gmbh | Fuel cell system |
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