JPH034721B2 - - Google Patents
Info
- Publication number
- JPH034721B2 JPH034721B2 JP15260182A JP15260182A JPH034721B2 JP H034721 B2 JPH034721 B2 JP H034721B2 JP 15260182 A JP15260182 A JP 15260182A JP 15260182 A JP15260182 A JP 15260182A JP H034721 B2 JPH034721 B2 JP H034721B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- state
- auxiliary axle
- discharge system
- 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
- 239000003921 oil Substances 0.000 claims description 155
- 238000001514 detection method Methods 0.000 claims description 9
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、油ポンプの補助車軸切損検出装置に
係り、特に、蒸気タービンの如く、慣性の大きな
主回転機とポンプの補助車軸が結合されている油
ポンプに於て、ポンプの補助車軸が切損したこと
を検知する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a breakage detection device for an auxiliary axle of an oil pump, and in particular, the present invention relates to a breakage detection device for an auxiliary axle of an oil pump, and is particularly applicable to systems where a main rotating machine with large inertia and an auxiliary axle of a pump are connected, such as a steam turbine. The present invention relates to a device for detecting breakage of the auxiliary axle of the pump in a conventional oil pump.
従来の装置は、油ポンプの補助車軸切損等の異
常を、蒸気タービンなどの回転機側に付加した主
車軸の回転数を検出する検出器と、油ポンプの補
助車軸の回転数を検出する検出器とにより検知
し、両方の検出器に検知される主車軸と油ポンプ
の補助車軸との回転数の差によつて判別してい
た。
Conventional equipment detects abnormalities such as breakage of the auxiliary axle of the oil pump by using a detector that detects the rotation speed of the main axle attached to a rotating machine such as a steam turbine, and a detector that detects the rotation speed of the auxiliary axle of the oil pump. The difference in rotational speed between the main axle and the auxiliary axle of the oil pump, which is detected by both detectors, is used for discrimination.
上記従来技術は、経済性が考慮されていないた
め、価格が高いという問題があつた。
The above-mentioned conventional technology has a problem in that it is expensive because it does not take economic efficiency into account.
本発明の目的は、油ポンプの補助車軸の切損を
安価に入手できる圧力スイツチの組み合せにより
検知可能な、油ポンプの補助車軸切損検出装置を
提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide an oil pump auxiliary axle breakage detection device capable of detecting breakage of an auxiliary axle of an oil pump using a combination of an inexpensively available pressure switch.
本発明は、補助車軸を介して回転機に接続さ
れ、回転機の軸受潤滑油を吐出系統を介して供給
する油ポンプと、油ポンプの吐出系統から分岐さ
れた第１の油管に接続され、検出した吐出系統の
油圧が第１の油圧設定値よりも低いときに第１の
状態となり、それ以外のときに第２の状態となる
第１の圧力スイツチと、前記油ポンプの吐出系統
から分岐された第２の油管に接続されたオリフイ
ス及び油室と、オリフイスと油室の接続部から油
管を介して接続され、検出された吐出系統の油圧
が前記第１の油圧設定値よりも高く設定された第
２の油圧設定値以上であるときに第１の状態とな
り、それ以外のときに第２の状態となる第２の圧
力スイツチと、第１の圧力スイツチと第２の圧力
スイツチとがともに第１の状態であるとき、前記
補助車軸の切損を検出する判別器とから構成され
る。
The present invention provides an oil pump that is connected to a rotating machine via an auxiliary axle and supplies bearing lubricating oil for the rotating machine via a discharge system, and a first oil pipe that is branched from the discharge system of the oil pump, A first pressure switch that is in a first state when the detected oil pressure of the discharge system is lower than a first oil pressure setting value and is in a second state otherwise, and a first pressure switch that is branched from the oil pump's discharge system. an orifice and an oil chamber connected to the second oil pipe, and a hydraulic pressure of a discharge system that is connected via an oil pipe from a connecting part of the orifice and the oil chamber, and the detected oil pressure is set higher than the first oil pressure setting value. a second pressure switch that is in the first state when the hydraulic pressure is equal to or higher than a second oil pressure set value, and is in the second state otherwise; the first pressure switch and the second pressure switch. and a discriminator that detects breakage of the auxiliary axle when both are in the first state.
本発明は、上記構成を有し、回転機が通常に停
止する場合は、油ポンプの吐出系統の油圧の降下
はゆるやかとなり、両方の圧力スイツチが同時に
第一の状態を示すことはないので、補助車軸は正
常と判定し、危急停止装置は作動しない。
The present invention has the above configuration, and when the rotating machine normally stops, the oil pressure in the oil pump discharge system drops slowly, and both pressure switches do not exhibit the first state at the same time. The auxiliary axle is determined to be normal and the emergency stop device does not operate.
一方、油ポンプの運転中に補助車軸が切損する
と油ポンプが急に停止し、油ポンプの吐出系統の
油圧が急激に低下する。しかし、オリフイスを介
して、この吐出系統に連通している油室の圧力の
低下は、ゆるやかであるため、第２の油圧設定値
の第２の圧力スイツチは第一の状態を保つが、第
１の油圧設定値の第１の圧力スイツチは、吐出系
統の油圧の低下により第二の状態から第一の状態
に切り換り、両方の圧力スイツチが同時に第一の
状態を示すことになり、補助車軸の切損を検知す
る。 On the other hand, if the auxiliary axle breaks while the oil pump is in operation, the oil pump suddenly stops and the oil pressure in the oil pump's discharge system drops rapidly. However, since the pressure in the oil chamber communicating with this discharge system via the orifice decreases slowly, the second pressure switch for the second oil pressure setting maintains the first state; The first pressure switch with one oil pressure setting value switches from the second state to the first state due to a decrease in the oil pressure of the discharge system, and both pressure switches simultaneously indicate the first state, Detects breakage of the auxiliary axle.
ここで、回転機が通常停止する場合、油ポンプ
の吐出系統の油圧の降下がゆるやかな理由は、回
転機の通常停止時は、油ポンプと回転機等との機
構が結合しているので、慣性が大きくなり油圧の
降下はゆるやかとなる。補助車軸切損直後は、上
記の場合とは逆に、油ポンプと回転機等との機構
が切断されるので、慣性が小さくなりポンプの吐
出圧は急激に低下する。一方、オリフイスを介し
て吐出系統に連通する油室の圧力は、ほぼ一定の
時間遅れで吐出系統の圧力に追従する。 Here, when the rotating machine normally stops, the reason why the oil pressure in the oil pump's discharge system drops gradually is because when the rotating machine normally stops, the mechanisms of the oil pump and the rotating machine etc. are coupled. The inertia increases and the oil pressure drops slowly. Immediately after the auxiliary axle is broken, contrary to the above case, the mechanism between the oil pump and the rotating machine is disconnected, so the inertia decreases and the pump discharge pressure drops rapidly. On the other hand, the pressure in the oil chamber communicating with the discharge system via the orifice follows the pressure in the discharge system with a substantially constant time delay.
以下、本発明の一実施例を第１図により説明す
る。
An embodiment of the present invention will be described below with reference to FIG.
第１図は、蒸気タービンの保護トリツプ装置に
本発明装置を組み込んだものを示す全体構成図で
ある。 FIG. 1 is an overall configuration diagram showing a protection trip device for a steam turbine incorporating the device of the present invention.
蒸気タービン１２の回転軸は、通常、翼車を有
する単数又は複数個の主車軸１３及び回転数の制
御機構の検出部を有する補助車軸１６から構成さ
れ、主車軸１３と補助車軸１６とはカツプリング
１４を介して接続されている。 The rotating shaft of the steam turbine 12 is usually composed of one or more main axles 13 having impellers and an auxiliary axle 16 having a detection unit for a rotation speed control mechanism, and the main axle 13 and the auxiliary axle 16 are coupled. 14.
油ポンプ１１より吐出された油は、油ポンプ１
１の吐出系統である油管１７、逆止弁１８を経
て、制御機器用としての高圧油と蒸気タービン１
２等の軸受潤滑油としての低圧油とを供給する。 The oil discharged from the oil pump 11 is
High-pressure oil for control equipment and steam turbine 1 are passed through an oil pipe 17 and a check valve 18, which are the discharge system of 1.
Supplies low pressure oil as second class bearing lubricating oil.
オイルタービン１９は、蒸気タービン１２等の
軸受潤滑油としての低圧油の系統に設置され、油
ポンプ１１の吐出油によつて駆動される。またブ
ースターポンプ２２は、カツプリング２１を介し
てオイルタービン１９に接続し、オイルタービン
１９で回収されたエネルギーによつて駆動し、油
タンク２３より油を吸上げ油管２４を経て油ポン
プ１１に油を供給している。 The oil turbine 19 is installed in a low-pressure oil system as bearing lubricating oil for the steam turbine 12 and the like, and is driven by oil discharged from the oil pump 11 . The booster pump 22 is connected to the oil turbine 19 via a coupling ring 21 and is driven by the energy recovered by the oil turbine 19 to suck up oil from the oil tank 23 and supply oil to the oil pump 11 through the oil pipe 24. supplying.
油ポンプ１１を駆動する補助車軸１６の先端に
は、調速機３１が設置され、調速機３１は蒸気タ
ービン１２へ入る作動流体、つまり蒸気タービン
１２に送られる蒸気の流入量を制御する加減弁３
４を開閉する。 A speed governor 31 is installed at the tip of the auxiliary axle 16 that drives the oil pump 11, and the speed governor 31 controls the amount of working fluid entering the steam turbine 12, that is, the amount of steam sent to the steam turbine 12. Valve 3
Open and close 4.
油ポンプ１１と逆止弁１８との間の油管１７
に、第１の油管２８（以下単に油管２８という）
及び弁３２を介して第１の圧力スイツチ２６（以
下単に圧力スイツチ２６という）を設置する。ま
た、油管１７より分岐した第２の油管２９（以下
単に油管２９という）、側にはオリフイス４２を
介して油室４１を設け、油室４１とオリフイス４
２間に弁３３を介して連通して、第２の圧力スイ
ツチ２７（以下単に圧力スイツチ２７という）が
設けられる。 Oil pipe 17 between oil pump 11 and check valve 18
, the first oil pipe 28 (hereinafter simply referred to as oil pipe 28)
A first pressure switch 26 (hereinafter simply referred to as pressure switch 26) is installed via the valve 32. Further, an oil chamber 41 is provided on the side of a second oil pipe 29 branched from the oil pipe 17 (hereinafter simply referred to as oil pipe 29) via an orifice 42, and the oil chamber 41 and the orifice 4
A second pressure switch 27 (hereinafter simply referred to as pressure switch 27) is provided in communication between the two via a valve 33.
両方の圧力スイツチ２６，２７の油圧設定値は
次のようになつている。すなわち第２図におい
て、油圧P1とP2が第１の油圧設定値、P3とP4が
第２の油圧設定値であり、いわゆるヒステリシス
特性を持たせるための動作に転じるときと復帰に
転じるときとで、油圧設定値に僅かに差を持たせ
ている。なお、オリフイスと油室を介して油圧を
検出する圧力スイツチ２７の第２の油圧設定値
P3とP4は、第１の油圧設定値P1とP2よりも高く
設定してある。具体的には第２図では、油ポンプ
１１がタービン起動に伴い徐々に回転数が上り吐
出圧力が徐々に上る場合、圧力スイツチ２６は第
１の油圧設定値P2で第１の状態（図ではOFFが
第１の状態とし、以下単にOFFあるいは、OFF
状態という）から、第２の状態（図ではONが第
２の状態とし、以下単にONあるいは、ON状態
という）に変り、圧力スイツチ２７は更に高い圧
力P4においてONからOFFに変るように設定され
ている。同様にタービンが通常運転から停止され
るとき圧力スイツチ２７はP4とほぼ同じ値のP3
でOFFからONに変り、圧力スイツチ２６はP2と
ほぼ同じ値のP1でONからOFFに変る。つまり両
方の圧力スイツチ２６，２７は逆特性を有する。 The oil pressure settings for both pressure switches 26, 27 are as follows. In other words, in Fig. 2, oil pressures P 1 and P 2 are the first oil pressure setting values, and P 3 and P 4 are the second oil pressure setting values. There is a slight difference in the oil pressure setting value depending on when the vehicle is turned. Note that the second oil pressure setting value of the pressure switch 27 that detects oil pressure via the orifice and the oil chamber
P 3 and P 4 are set higher than the first oil pressure set values P 1 and P 2 . Specifically, in FIG. 2, when the rotation speed of the oil pump 11 gradually increases as the turbine starts and the discharge pressure gradually increases, the pressure switch 26 is in the first state (see FIG. 2) at the first oil pressure setting value P2. In this case, OFF is the first state, and hereinafter simply OFF or OFF
The pressure switch 27 is set to change from ON to OFF at an even higher pressure P4 . has been done. Similarly, when the turbine is shut down from normal operation, the pressure switch 27 is set to P 3 which is approximately the same value as P 4 .
The pressure switch 26 changes from ON to OFF at P1 , which is approximately the same value as P2 . In other words, both pressure switches 26, 27 have opposite characteristics.
本発明の車軸切損検出装置は以上のように構成
されており、ここで圧力スイツチ２７の入口部の
油圧は、オリフイスと油室を介して伝播されるた
めに圧力スイツチ２６の入口部の油圧に較べて遅
れて追従する。勿論この遅れ時間T1はオリフイ
スと油室の大きさによつて定まる。一方、通常の
速度変化率に従つて油ポンプを起動あるいは停止
した場合、吐出系統の油圧が第１の油圧設定値か
ら第２の油圧設定値に至る（あるいはその逆方向
への油圧変化）までの時間T2も予め知り得る。
従つて、第２図に示すように通常起動によつて油
圧上昇する時、圧力スイツチ２６が第１の油圧設
定値P2を検出してから圧力スイツチ２７がP4を
検出するまでの時間T0はT2とT1の和（T0＝T2
＋T1）となり、逆に通常停止によつて油圧低下
する時、圧力スイツチ２７が第２の油圧設定値
P3を検出してから圧力スイツチ２６がP1を検出
するまでの時間T0はT2とT1の差（T0＝T2−
T1）となる。ただし、起動時と停止時で油圧変
化率および検出する油圧差は等しいとする。この
ように圧力スイツチの一方が状態変化（ONから
OFFあるいはOFFからON）してから他方の圧力
スイツチが状態変化するまでの時間T0は起動時
と停止時で相違するが、ここで油圧の低下が急激
であることを想定すると、油圧変化率で定まる時
間T2が遅れて時間T1よりも短くなることがあ
り、この場合２つの圧力スイツチが共に第１の状
態となる。すなわち詳細は後述するが、第２図の
破線右側に図示されているように、両者圧力スイ
ツチが共にOFFの状態となる。本発明ではこの
関係を利用して補助車軸の切損を検出する。 The axle breakage detection device of the present invention is constructed as described above. Here, the hydraulic pressure at the inlet of the pressure switch 27 is propagated via the orifice and the oil chamber, so the hydraulic pressure at the inlet of the pressure switch 26 is Follows up later than . Of course, this delay time T1 is determined by the size of the orifice and oil chamber. On the other hand, when the oil pump is started or stopped according to the normal speed change rate, the oil pressure in the discharge system reaches from the first oil pressure setting value to the second oil pressure setting value (or the oil pressure changes in the opposite direction). The time T2 can also be known in advance.
Therefore, as shown in FIG. 2, when the oil pressure increases due to normal startup, the time T0 from when the pressure switch 26 detects the first oil pressure setting value P2 until the pressure switch 27 detects P4 . is the sum of T2 and T1 (T0=T2
+T1), and conversely, when the oil pressure decreases due to normal stop, the pressure switch 27 changes to the second oil pressure setting value.
The time T0 from when P 3 is detected until the pressure switch 26 detects P 1 is the difference between T2 and T1 (T0 = T2 -
T1). However, it is assumed that the oil pressure change rate and the detected oil pressure difference are the same at startup and stop. In this way, one side of the pressure switch changes state (from ON to
The time T0 from turning OFF (or from OFF to ON) until the other pressure switch changes state differs between starting and stopping, but assuming that the oil pressure decreases rapidly, the rate of change in oil pressure The determined time T2 may be delayed and become shorter than the time T1, in which case both pressure switches will be in the first state. That is, although details will be described later, both pressure switches are in the OFF state, as shown on the right side of the broken line in FIG. In the present invention, this relationship is utilized to detect breakage of the auxiliary axle.
第２図は、第１図に示した蒸気タービン１２の
保護トラツプ装置における油圧設定値が異なる二
種類の圧力スイツチ２６，２７のON状態及び
OFF状態を示すと同時に、判別器３６の判別条
件を示したものである。 FIG. 2 shows the ON states and states of two types of pressure switches 26 and 27 with different oil pressure settings in the protective trap device of the steam turbine 12 shown in FIG.
It shows the OFF state and the discrimination conditions of the discriminator 36.
ここで、図中の実線は油ポンプ１１の吐出系統
つまり油管１７における油圧設定値の低い圧力ス
イツチ２６の油圧の変化状態を示し、図中の点線
はオリフイス４２によつて遅れ時間を生じた油室
４１内における油圧設定値の高い圧力スイツチ２
７の油圧の変化状態を示したものである。 Here, the solid line in the figure shows the change state of the oil pressure of the pressure switch 26 with a low oil pressure setting value in the discharge system of the oil pump 11, that is, the oil pipe 17, and the dotted line in the figure shows the change in oil pressure caused by the delay time caused by the orifice 42. Pressure switch 2 with high oil pressure setting value in chamber 41
7 shows the state of change in the oil pressure.
判別器３６は、圧力スイツチ２６，２７の信号
が同時にOFF状態を示した時のみ作動され、危
急遮断弁３７を作動させる信号を出力する。 The discriminator 36 is activated only when the signals of the pressure switches 26 and 27 simultaneously indicate the OFF state, and outputs a signal that activates the emergency shutoff valve 37.
第２図の左部、蒸気タービン１２が通常停止す
る時は、油管１７及び油室４１内の油圧はゆるや
かに降下するため、圧力スイツチ２６，２７は同
時にOFF状態を示すことはなく、判別器３６は
出力信号を出さない。 On the left side of Fig. 2, when the steam turbine 12 normally stops, the oil pressure in the oil pipe 17 and the oil chamber 41 drops slowly, so the pressure switches 26 and 27 do not indicate the OFF state at the same time, and the discriminator 36 does not output an output signal.
一方第２図右部、補助車軸１６の切損直後は、
油ポンプ１１が急に停止し、吐出系統の圧力は実
線にて示す如く、通常停止時の圧力低下に比べて
数倍の速い速度で低下する。一方、油室４１内の
圧力は一定の時間遅れをもつて、吐出系統の圧力
に追加するので、圧力スイツチ２６，２７の動作
の順番が通常停止に比べて逆転し、圧力スイツチ
２６の方が先にONからOFFになるので、この時
点で両方の圧力スイツチは同時にOFFとなる。
圧力スイツチ２６，２７の信号は、判別器３６に
導かれ、前記両圧力スイツチがOFF状態である
と出力信号を出し危急遮断弁３７を作動させ、蒸
気タービン１２の加減弁３４が閉じ、蒸気タービ
ン１２を停止させる。 On the other hand, on the right side of Figure 2, immediately after the auxiliary axle 16 is broken,
The oil pump 11 suddenly stops, and the pressure in the discharge system drops at a rate several times faster than the pressure drop when it normally stops, as shown by the solid line. On the other hand, since the pressure in the oil chamber 41 is added to the pressure in the discharge system with a certain time delay, the order of operation of the pressure switches 26 and 27 is reversed compared to the normal stop, and the pressure switch 26 is Since it goes from ON to OFF first, both pressure switches are turned OFF at the same time.
The signals from the pressure switches 26 and 27 are guided to the discriminator 36, and when both pressure switches are in the OFF state, an output signal is issued and the emergency shutoff valve 37 is activated, the control valve 34 of the steam turbine 12 is closed, and the steam turbine is closed. 12 is stopped.
蒸気タービン１２の起動時は、蒸気タービン１
２の速度上昇に伴い油管１７の油圧も上昇する。
圧力スイツチ２６は、油管１７の油圧がP2以上
に上昇したときOFF状態を解除する。圧力スイ
ツチ２７は、油室４１内の油圧がP4以上に上昇
したときOFF状態を確立する。 When starting the steam turbine 12, the steam turbine 1
2, the oil pressure in the oil pipe 17 also increases.
The pressure switch 26 releases the OFF state when the oil pressure in the oil pipe 17 rises to P2 or higher. The pressure switch 27 establishes an OFF state when the oil pressure in the oil chamber 41 rises above P4 .
蒸気タービン１２の通常運転時は、油管１７及
び油室４１内の油圧はほぼＰを維持する。 During normal operation of the steam turbine 12, the oil pressure in the oil pipe 17 and the oil chamber 41 is maintained at approximately P.
蒸気タービン１２の通常停止前後は、蒸気ター
ビン１２の速度降下に伴い油管１７の油圧もゆる
やかに降下する。圧力スイツチ２６は、油管１７
の油圧がP1以下に降下したときOFF状態を確立
する。圧力スイツチ２７は、油室４１内の油圧が
P3以下に降下したときOFF状態を解除する。 Before and after the steam turbine 12 normally stops, the oil pressure in the oil pipe 17 also gradually decreases as the speed of the steam turbine 12 decreases. The pressure switch 26 is connected to the oil pipe 17
The OFF state is established when the oil pressure of the pump drops below P1 . The pressure switch 27 controls the oil pressure in the oil chamber 41.
The OFF state is canceled when the temperature drops below P3 .
即ち、通常の起動・運転及び停止において、圧
力スイツチ２６，２７が同時にOFF状態を確立
することはなく、判別器３６が作動することはな
い。 That is, during normal startup, operation, and shutdown, the pressure switches 26 and 27 do not establish an OFF state at the same time, and the discriminator 36 does not operate.
通常運転中において補助車軸１６が切損したと
仮定する。油ポンプ１１はただちに停止し、油管
１７の油圧は急激に低下する。圧力スイツチ２６
は油管１７の油圧がP1以下に低下したときOFF
状態を確立し、圧力スイツチ２７は油室４１内の
油圧がP3以下に低下したときOFF状態を解除す
る。 Assume that the auxiliary axle 16 breaks during normal operation. The oil pump 11 immediately stops, and the oil pressure in the oil pipe 17 drops rapidly. Pressure switch 26
turns OFF when the oil pressure in oil pipe 17 drops below P1 .
The pressure switch 27 releases the OFF state when the oil pressure in the oil chamber 41 drops below P3 .
このとき、油圧設定値の高い圧力スイツチ２７
の系統において、油管１７と油室４１との間に設
置されたオリフイス４２は、油管１７の油圧に対
する油室４１内の油圧の変化を遅らせる。 At this time, the pressure switch 27 with a high oil pressure setting value
In this system, the orifice 42 installed between the oil pipe 17 and the oil chamber 41 delays the change in the oil pressure in the oil chamber 41 with respect to the oil pressure in the oil pipe 17.
このようにオリフイス４２の性質によつて、圧
力スイツチ２７はOFF状態解除の時間が遅れ、
圧力スイツチ２６，２７が同時にOFF状態を確
立し、判別器３６が作動し、危急遮断弁３７を動
かす。 As described above, due to the nature of the orifice 42, the pressure switch 27 has a delay in releasing the OFF state.
The pressure switches 26 and 27 simultaneously establish an OFF state, the discriminator 36 is activated, and the emergency shutoff valve 37 is activated.
本発明は、簡便な装置で、油ポンプ吐出系統の
油圧の急激な降下によつて、間接的に補助車軸切
損を検知するので、回転機の事故に至る前に危急
停止させることができると共に、次の効果を有す
る。
The present invention is a simple device that indirectly detects breakage of the auxiliary axle based on a sudden drop in oil pressure in the oil pump discharge system, making it possible to stop the rotating machine in an emergency before an accident occurs. , has the following effect.
本発明では、油ポンプが完全に停止して、油ポ
ンプ吐出系統の油圧が零を示すと自動的に回転機
危急停止信号は解除され、リセツト状態となる。
従つて別にリセツト用のスイツチを設置する必要
はない。 In the present invention, when the oil pump completely stops and the oil pressure in the oil pump discharge system shows zero, the rotating machine emergency stop signal is automatically canceled and the system enters a reset state.
Therefore, there is no need to install a separate reset switch.
また、本発明では、複数の圧力スイツチが同時
にOFFの状態を示したときに、回転機が危急停
止することにしているので、圧力スイツチの電源
がたたれる等の事故時には、回転機が危急停止と
なり、安全側の動作ともなる。 In addition, in the present invention, the rotating machine is brought to an emergency stop when multiple pressure switches are turned off at the same time, so in the event of an accident such as power failure of the pressure switches, the rotating machine will come to an emergency stop. This is a safe operation.
従つて、本発明では、回転機と油ポンプとが連
結している装置における補助車軸の故障を即座に
検知し、回転機を自動的に停止し得るので、回転
機の制御が不可能になる事態を未然に防止する効
果を奏する。 Therefore, in the present invention, failure of the auxiliary axle in a device in which a rotating machine and an oil pump are connected can be immediately detected and the rotating machine can be automatically stopped, making it impossible to control the rotating machine. This has the effect of preventing situations from occurring.
第１図は、本発明の補助車軸切損検知装置によ
り蒸気タービンをトリツプさせる保護装置を示す
全体構成図であり、第２図は、第１図に示した補
助車軸切損検知装置における油圧設定値が異なる
２種類の圧力スイツチのON状態及びOFF状態を
示す説明図である。
１１……油ポンプ、１２……蒸気タービン、１
６……補助車軸、２６，２７……圧力スイツチ、
３４……加減弁、３６……判定器、３７……危急
遮断弁、４１……油室、４２……オリフイス。
FIG. 1 is an overall configuration diagram showing a protection device for tripping a steam turbine using the auxiliary axle breakage detection device of the present invention, and FIG. 2 shows the oil pressure settings in the auxiliary axle breakage detection device shown in FIG. FIG. 3 is an explanatory diagram showing ON and OFF states of two types of pressure switches with different values. 11...Oil pump, 12...Steam turbine, 1
6... Auxiliary axle, 26, 27... Pressure switch,
34...Adjustment valve, 36...Judgment device, 37...Emergency shutoff valve, 41...Oil chamber, 42...Orifice.
Claims (1)
転機の軸受潤滑油を吐出系統を介して供給する油
ポンプの補助車軸の切損を検出する油ポンプの補
助車軸切損検出装置において、 油ポンプの吐出系統から分岐された第１の油管
に接続され、検出した吐出系統の油圧が第１の油
圧設定値よりも低いときに第１の状態となり、そ
れ以外のときに第２の状態となる第１の圧力スイ
ツチ、 前記油ポンプの吐出系統から分岐された第２の
油管に接続されたオリフイスと油室、オリフイス
と油室の接続部から油管を介して接続され、検出
された吐出系統の油圧が前記第１の油圧設定値よ
りも高く設定された第２の油圧設定値以上である
ときに第１の状態となり、それ以外のときに第２
の状態となる第２の圧力スイツチ、 前記第１の圧力スイツチと前記第２の圧力スイ
ツチとがともに第１の状態であるとき、前記補助
車軸の切損を検出する判別器、 から構成される油ポンプの補助車軸の切損検出装
置。[Scope of Claims] 1. An oil pump auxiliary axle disconnection system that detects breakage of the auxiliary axle of an oil pump that is connected to a rotating machine via an auxiliary axle and supplies bearing lubricating oil to the rotating machine via a discharge system. The loss detection device is connected to a first oil pipe branched from the oil pump's discharge system, and enters the first state when the detected oil pressure of the discharge system is lower than the first oil pressure setting value, and otherwise enters the first state. a first pressure switch that is in a second state, an orifice and an oil chamber connected to a second oil pipe branched from the discharge system of the oil pump, and a first pressure switch connected via an oil pipe from a connection between the orifice and the oil chamber The first state is reached when the detected oil pressure of the discharge system is equal to or higher than the second oil pressure setting value, which is set higher than the first oil pressure setting value, and the second state is reached at other times.
A discriminator that detects breakage of the auxiliary axle when both the first pressure switch and the second pressure switch are in the first state. Breakage detection device for oil pump auxiliary axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15260182A JPS5943906A (en) | 1982-09-03 | 1982-09-03 | Oil pump auxiliary axle breakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15260182A JPS5943906A (en) | 1982-09-03 | 1982-09-03 | Oil pump auxiliary axle breakage detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5943906A JPS5943906A (en) | 1984-03-12 |
| JPH034721B2 true JPH034721B2 (en) | 1991-01-23 |
Family
ID=15543976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15260182A Granted JPS5943906A (en) | 1982-09-03 | 1982-09-03 | Oil pump auxiliary axle breakage detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5943906A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292225A (en) * | 1992-09-18 | 1994-03-08 | Westinghouse Electric Corp. | Overspeed protection apparatus for a turbomachine |
-
1982
- 1982-09-03 JP JP15260182A patent/JPS5943906A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5943906A (en) | 1984-03-12 |
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