JP2000009040A - Main engine driving main oil pump - Google Patents
Main engine driving main oil pumpInfo
- Publication number
- JP2000009040A JP2000009040A JP10180281A JP18028198A JP2000009040A JP 2000009040 A JP2000009040 A JP 2000009040A JP 10180281 A JP10180281 A JP 10180281A JP 18028198 A JP18028198 A JP 18028198A JP 2000009040 A JP2000009040 A JP 2000009040A
- Authority
- JP
- Japan
- Prior art keywords
- main
- main oil
- oil pump
- pump
- suction
- 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.)
- Withdrawn
Links
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、蒸気タービン等主
機の駆動部の潤滑等を行うため、主機によって直接又は
間接に駆動され、駆動部に潤滑油等を供給するようにし
た主機駆動主油ポンプに係わり、特に、主機設置の制約
上主油ポンプの設置に制限が生じ、吸込揚程が不足する
のを、主油ポンプ吸込口と主油タンクとの間に設けられ
る吸込ラインに、主油ポンプから吐出される油の一部等
を使って作動させ、吸込揚程を主油ポンプが必要とする
吸込揚程以上にすることのできるエゼクタを設けるよう
にした主機駆動主油ポンプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main engine drive main oil which is driven directly or indirectly by a main engine to supply a lubricating oil or the like to a drive section of a main engine such as a steam turbine for lubrication. In connection with the pump, in particular, the installation of the main oil pump is restricted due to the restriction of the main engine, and the shortage of the suction lift is caused by the fact that the main oil pump is installed in the suction line provided between the main oil pump inlet and the main oil tank. The present invention relates to a main engine driven main oil pump provided with an ejector which is operated by using a part of oil discharged from a pump or the like so that a suction head can be equal to or more than a suction head required by a main oil pump.
【０００２】[0002]
【従来の技術】例えば、主機の駆動部である各摺動部を
潤滑するために、主機によって直接駆動され、各摺動部
に潤滑油を供給するようにした主機駆動主油ポンプが、
従来から使用されている。このような、主機駆動主油ポ
ンプは、直接駆動を行う主機と略同一レベルに設置され
ることになるが、この主油ポンプに潤滑油を供給する主
油タンクは、主機の設置高さ以上の位置に設置できない
場合が多く、このため、吸込揚程が、殆どない遠心型ポ
ンプを主油ポンプとして採用するのを避け、吸込揚程を
発生させることのできるスクリューポンプ、ギヤポンプ
等の容積型ポンプを、主油ポンプとして使用するように
して、主油タンクの設置場所によっては生じることのあ
る吸込揚程の不足により生じる不具合を若干でも緩和す
るようにしている。2. Description of the Related Art For example, a main engine drive main oil pump driven directly by a main engine to supply lubricating oil to each sliding section in order to lubricate each sliding section which is a driving section of the main engine,
It has been used for some time. Such a main engine drive main oil pump will be installed at substantially the same level as the main engine that directly drives, but the main oil tank that supplies lubricating oil to this main oil pump must be at least as high as the installation height of the main engine. In many cases, it is not possible to install a centrifugal pump having almost no suction lift as a main oil pump, and a positive displacement pump such as a screw pump or a gear pump that can generate a suction lift can be used. By using the pump as a main oil pump, a problem caused by a shortage of the suction lift, which may occur depending on the installation location of the main oil tank, is mitigated to some extent.
【０００３】しかしながら、容積型ポンプを主油ポンプ
として使用するようにした場合においても、主油ポンプ
の吸込揚程には限度があり、スクリュー式の場合で４〜
５ｍの吸込揚程であり、主機と主油タンクの据付位置高
さの差が、この主油ポンプの吸込揚程以下になるように
限定され、主機を設けるようにしたプラントの設計に制
約が生じることがあった。[0003] However, even when a positive displacement pump is used as the main oil pump, the suction lift of the main oil pump is limited.
The suction head is 5 m, and the height difference between the installation position of the main engine and the main oil tank is limited so as to be equal to or less than the suction head of the main oil pump, which restricts the design of the plant in which the main engine is installed. was there.
【０００４】すなわち、図３に示すように、主機として
の蒸気タービン０１と歯車で連結され、蒸気タービン０
１で直接駆動されるようにした、従来のスクリュー式等
を採用した容積型主油ポンプ０２は、蒸気タービン０１
の設置高さより下方に設置された主油タンク０５より、
容積型主油ポンプ０２の吸込口０３と主油タンク０５と
の間に連結された吸込ライン０６を介して、主油タンク
０５内の潤滑油を吸入して、加圧した後、吐出口０４よ
り吐出ライン０７へ吐出し、油系統ライン０８を介し
て、付属機器を含む蒸気タービン０１の駆動部の各摺動
部へ潤滑油を供給するようにしている。That is, as shown in FIG. 3, a steam turbine 01 as a main engine is connected by gears,
1 is a direct displacement driven main oil pump 02 employing a conventional screw type or the like.
From the main oil tank 05 installed below the installation height of
After sucking and pressurizing the lubricating oil in the main oil tank 05 through a suction line 06 connected between the suction port 03 of the positive displacement main oil pump 02 and the main oil tank 05, the discharge port 04 The oil is further discharged to a discharge line 07, and lubricating oil is supplied to each sliding portion of a drive unit of the steam turbine 01 including an accessory through an oil system line 08.
【０００５】また、蒸気タービン０１の始動前、もしく
は停止後、すなわち、蒸気タービン０１により主油ポン
プ０２が駆動できないときに、蒸気タービン０１の各摺
動部の予潤滑、又は各摺動部の余熱を除去して冷却を行
う潤滑油を供給するために、容積型主油ポンプ０２と同
様に主油タンク０５内の潤滑油を吸入し、油系統ライン
０８に吐出させるようにした電動式の補助油ポンプ０９
を設けるようにしている。[0005] Before or after the start of the steam turbine 01, that is, when the main oil pump 02 cannot be driven by the steam turbine 01, the pre-lubrication of each sliding portion of the steam turbine 01 or the pre-lubrication of each sliding portion of the steam turbine 01 is performed. In order to supply the lubricating oil for cooling by removing the residual heat, the lubricating oil in the main oil tank 05 is sucked and discharged to the oil system line 08 similarly to the positive displacement main oil pump 02. Auxiliary oil pump 09
Is provided.
【０００６】しかしながら、上述したように、主油ポン
プを吸込揚程を殆んど発生できない遠心型ポンプから、
スクリュー式等の容積型ポンプ０２に変更しても、蒸気
タービン０１の各摺動部に潤滑油を供給する容積型主油
ポンプ０５の吸込揚程は、上述した程度の吸込揚程に限
定され、このために、蒸気タービン０１で直接駆動する
ようにしている容積型主油ポンプ０２の吸込口０３と主
油タンク０５内の潤滑油の液面との間には、この容積型
主油ポンプ０２の吸込揚程以上の差を設けることができ
ず、蒸気タービン０１と主油タンク０５の据付位置高さ
の差は、吸込揚程以内にしなければならないという配置
上の制約を受ける不具合がある。However, as described above, the main oil pump is moved from a centrifugal pump which can hardly generate a suction lift.
Even if the displacement is changed to a positive displacement pump 02 such as a screw type, the suction lift of the positive displacement main oil pump 05 that supplies lubricating oil to each sliding portion of the steam turbine 01 is limited to the above-described suction lift. Therefore, between the suction port 03 of the positive displacement main oil pump 02 which is driven directly by the steam turbine 01 and the level of the lubricating oil in the main oil tank 05, the positive displacement of the positive displacement main oil pump 02 A difference larger than the suction head cannot be provided, and there is a problem in that the difference between the installation position heights of the steam turbine 01 and the main oil tank 05 must be within the suction head, which is a restriction on arrangement.
【０００７】すなわち、通常、架台０１０上に設置され
る蒸気タービン０１の設置高さから、吸込揚程以下にな
る高さの位置にしか主油タンク０５を設置することがで
きず、主油タンク０５の設置高さが制限を受けることと
なり、また、主油タンク０５の容積が嵩ばることもあっ
て、このような蒸気タービン０１を設けるようにしたプ
ラントの設計が、制約を受けることになるという不具合
がある。なお、図において、０１１は吐出ライン０７と
油系統ライン０８との間に介装された逆止弁、０１２は
吸込ライン０６の下端に設けた吸込マウスである。[0007] That is, the main oil tank 05 can be installed only at a position below the suction height of the steam turbine 01 normally installed on the gantry 010, and the main oil tank 05 The installation height of the steam turbine 01 is limited, and the design of the plant in which such a steam turbine 01 is provided is limited because the volume of the main oil tank 05 is large. There is a defect. In the drawing, 011 is a check valve interposed between the discharge line 07 and the oil system line 08, and 012 is a suction mouse provided at the lower end of the suction line 06.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、主機の駆動
部の潤滑を行うために、主機により駆動され、駆動部に
潤滑油等を吐出させる主油ポンプを設けるようにした、
従来の主機駆動主油ポンプの不具合、すなわち、主油ポ
ンプの吸込揚程が低いために、主機もしくは主油ポンプ
の設置高さに制限を受け、プラントの設計等に制約を受
けることになる不具合を解消するため、主油ポンプに主
油タンクから潤滑油を供給するために配設される吸込ラ
インにエゼクタを設け、このエゼクタにより主油ポンプ
の吸込揚程を向上させ、主機もしくは主油ポンプの設置
高さの制限をなくし、すなわち、主油ポンプの吸込口と
主油タンク内の液面との差が大きくなるようなことがあ
っても、主油ポンプを稼動させることができ、主機もし
くは主油ポンプの高さを任意に設定できる、主機を設け
るようにしたプラントの設計上の制約をなくすることが
できるようにした、主機駆動主油ポンプを提供すること
を課題とする。SUMMARY OF THE INVENTION The present invention provides a main oil pump which is driven by a main engine and discharges lubricating oil and the like to the driving section in order to lubricate a driving section of the main engine.
The problem of the conventional main engine driven main oil pump, that is, the problem that the installation height of the main engine or main oil pump is limited due to the low suction lift of the main oil pump, which limits the plant design etc. In order to solve this problem, an ejector is provided in the suction line that is provided to supply the main oil pump with lubricating oil from the main oil tank, and this ejector improves the suction lift of the main oil pump and installs the main engine or main oil pump. The height restriction is eliminated, that is, even if the difference between the suction port of the main oil pump and the liquid level in the main oil tank becomes large, the main oil pump can be operated and the main engine or the main engine can be operated. It is an object of the present invention to provide a main engine driven main oil pump capable of arbitrarily setting the height of an oil pump and eliminating restrictions on design of a plant provided with a main engine.
【０００９】[0009]
【課題を解決するための手段】このため、本発明の主機
駆動主油ポンプは、次の手段とした。Therefore, the main engine driven main oil pump of the present invention has the following means.
【００１０】（１）主機によって、直接若しくは間接的
に駆動される、主機駆動の主油ポンプの吸込口と主油タ
ンクとの間に設置された吸込ラインの主油タンク内の吸
込部近傍に、主油ポンプの吐出油の一部若しくは全部を
注入することにより作動させ、主油ポンプの吸込揚程を
向上させるエゼクタを設けた。[0010] (1) A suction line, which is directly or indirectly driven by the main engine and is provided between the suction port of the main oil pump driven by the main engine and the main oil tank, in the vicinity of a suction portion in the main oil tank of the main oil tank. An ejector is provided which is operated by injecting part or all of the discharge oil of the main oil pump to improve the suction lift of the main oil pump.
【００１１】（ａ）これにより、本発明の主機駆動主油
ポンプでは、主油ポンプとして、吸込揚程を殆んど発生
させることのできない遠心型ポンプが使用できるように
なるとともに、容積型ポンプを使用する場合において
も、主油ポンプの吸込揚程以上になる下方になる位置に
主油タンクを設置するようにしても、主油ポンプは主油
タンク内の潤滑油を吸入出来るようになり、主油ポンプ
の設置高さ、延いては、主油ポンプを駆動する主機の高
さの制限がなくなり、主機もしくは主油ポンプの設置高
さを自在に選択することができるようになり、従来のプ
ラントの設計等で制約を受けることのあった機器配置上
等で生じる不具合を解消することができる。(A) Thus, in the main engine driven main oil pump of the present invention, a centrifugal pump that can hardly generate a suction lift can be used as the main oil pump, and a positive displacement pump can be used. Even when the main oil pump is used, even if the main oil tank is installed at a position lower than the suction head of the main oil pump, the main oil pump can suck the lubricating oil in the main oil tank, The installation height of the oil pump, and hence the height of the main unit that drives the main oil pump, is no longer restricted, and the installation height of the main unit or the main oil pump can be freely selected. It is possible to eliminate a problem that occurs in the arrangement of devices and the like, which is restricted by the design and the like.
【００１２】また、本発明の主機駆動主油ポンプは、次
の手段とした。 （２）主機の駆動部の潤滑等を行うために、主機によっ
て直接駆動され、駆動部に潤滑油を吐出させるようにし
た容積型の主油ポンプの吸込口と、容積型主油ポンプに
潤滑油を供給するために設けられた主油タンクとの間に
設置された潤滑油の吸込ラインに、主油タンクから吸入
され、容積型主油ポンプによって主機の駆動部に吐出さ
れる潤滑油の一部を分岐させて、主油タンクに戻される
潤滑油の流体力で吸引力を発生させ、容積型主油ポンプ
の吸込揚程を向上させるようにしたエゼクタを設けた。The main engine driven main oil pump of the present invention employs the following means. (2) In order to lubricate the drive unit of the main engine, the suction port of the positive displacement main oil pump which is directly driven by the main engine and discharges the lubricating oil to the drive unit, and the positive displacement main oil pump are lubricated. The lubricating oil suction line is installed between the main oil tank and the main oil tank provided to supply the oil. The lubricating oil is drawn from the main oil tank and discharged to the drive unit of the main engine by the positive displacement main oil pump. An ejector is provided in which a part is branched and a suction force is generated by the fluid force of the lubricating oil returned to the main oil tank to improve the suction lift of the positive displacement main oil pump.
【００１３】（ｂ）これにより、本発明の主機駆動主油
ポンプでは、容積型主油ポンプから吐出され、主油タン
クに戻される潤滑油の流体力の吸引力の発生によって、
上述（ａ）と同様に、主油ポンプおよび主油ポンプを直
接駆動する主機の高さの制限がなくりり、これらの設置
高さが自在に選択でき、プラントの設計等の制約を受け
る不具合をなくすることができる。また、本発明の主機
駆動主油ポンプでは、エゼクタに発生する容積型主油ポ
ンプの吸込揚程が、エゼクタの容量にもよるが、略２倍
の１０ｍ程度にまで向上し、容積型主油ポンプの設置高
さと略同じになる主機の設置された位置より、容積型主
油ポンプの吸込揚程以上、下方になる位置に主油タンク
を設置するようにしても、主油ポンプは主油タンク内の
潤滑油を吸入出来るようになる。(B) Thus, in the main engine driven main oil pump of the present invention, the suction force of the fluid force of the lubricating oil discharged from the positive displacement main oil pump and returned to the main oil tank is generated.
As in the above (a), there is no limitation on the height of the main oil pump and the main machine that directly drives the main oil pump. Can be eliminated. Further, in the main engine driven main oil pump of the present invention, the suction head of the positive displacement main oil pump generated in the ejector is improved to about 10 m, which is almost doubled, depending on the capacity of the ejector. Even if the main oil tank is installed at a position lower than the suction position of the positive displacement main oil pump by more than the suction position of the main engine, which is almost the same as the installation height of the main engine, the main oil pump is Lubricating oil can be inhaled.
【００１４】さらに、本発明の主機駆動主油ポンプは、
上述（２）に加え、次の手段とした。Further, the main engine driven main oil pump of the present invention
In addition to the above (2), the following means was used.
【００１５】（３）エゼクタが、上述（２）の手段にお
ける容積型主油ポンプから吐出される潤滑油の一部を分
岐させて、主油タンクに戻される潤滑油によって作動さ
せることができるとともに、容積型主油ポンプと同様
に、主油タンクから吸入され電動補助油ポンプから駆動
部に吐出させる潤滑油の一部を分岐させて、主油タンク
に戻される潤滑油によっても、作動させることができ、
容積型主油ポンプの吸込揚程を大きくできるものにし
た。(3) The ejector is capable of diverting a part of the lubricating oil discharged from the positive displacement main oil pump in the above-mentioned means (2) and operating it by the lubricating oil returned to the main oil tank. In the same manner as the positive displacement main oil pump, a part of the lubricating oil sucked from the main oil tank and discharged from the electric auxiliary oil pump to the drive unit is branched and operated by the lubricating oil returned to the main oil tank. Can be
The suction head of the positive displacement main oil pump can be increased.
【００１６】（ｃ）これにより、本発明の主機駆動主油
ポンプでは、上述（ｂ）に加え、主機の始動前もしくは
停止後、すなわち、主機が停止して主油ポンプが作動し
てなく、しかも、駆動部が冷却等のために潤滑油の供給
を必要とするときにおいても、駆動部への潤滑油の供給
ができるようになるとともに、主機の停止時において
も、容積型主油ポンプの吸込揚程を大きくしておくこと
ができるので、主機の始動とともに、主油ポンプは主油
タンク内の潤滑油を吸入して、速やかに、主油ポンプに
よって駆動部への潤滑油の供給ができるようになる。(C) Accordingly, in the main engine driven main oil pump according to the present invention, in addition to the above (b), before or after starting the main engine, that is, the main engine stops and the main oil pump does not operate. Moreover, even when the drive unit needs to supply the lubricating oil for cooling or the like, the lubricating oil can be supplied to the drive unit, and even when the main engine is stopped, the displacement of the positive displacement main oil pump is reduced. Since the suction lift can be increased, the main oil pump sucks the lubricating oil in the main oil tank when the main engine starts, and the lubricating oil can be quickly supplied to the drive unit by the main oil pump. Become like
【００１７】[0017]
【発明の実施の形態】以下、本発明の主機駆動主油ポン
プの実施の一形態を、図面にもとづき説明する。図１は
本発明の主機駆動主油ポンプの実施の第１形態を示すブ
ロック図である。なお、図３で示した部材と同一の部
材、もしくは類似の部材には同一符号を付して、説明は
極力省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a main engine driven main oil pump according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a main engine driven main oil pump according to the present invention. The same or similar members as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted as much as possible.
【００１８】図に示すように、主機としての蒸気タービ
ン０１と歯車で連結され、蒸気タービン０１で直接駆動
されるようにした、スクリュー式を採用した容積型主油
ポンプ３０によって、蒸気タービン０１の設置高さより
下方に設置された主油タンク０５より、容積型主油ポン
プ３０の吸込口０３と主油タンク０５との間に連結され
た吸込ライン０６を介して、主油タンク０５内の潤滑油
を吸入し、加圧した後、容積型主油ポンプ３０の吐出口
０４より吐出ライン０７へ吐出するようにしている。As shown in FIG. 1, a positive displacement type main oil pump 30 adopting a screw type, which is connected to a steam turbine 01 as a main engine by a gear and is directly driven by the steam turbine 01, allows the steam turbine 01 to be driven. Lubrication in the main oil tank 05 from the main oil tank 05 installed below the installation height via a suction line 06 connected between the suction port 03 of the positive displacement main oil pump 30 and the main oil tank 05. After the oil is sucked and pressurized, it is discharged from the discharge port 04 of the positive displacement main oil pump 30 to the discharge line 07.
【００１９】また、蒸気タービン０１の始動前、もしく
は停止後、すなわち、蒸気タービン０１により容積型主
油ポンプ３０が駆動できないときに、容積型主油ポンプ
３０とは別に設けられた電動式の補助油ポンプ０９によ
り、蒸気タービン０１の各摺動部の予潤滑、又は各摺動
部の冷却を行う潤滑油と供給するために、主油タンク０
５内の潤滑油を吸入し、加圧された後、補助油ポンプ０
９の吐出口より吐出ラインへ吐出するようにしている。Before or after the start of the steam turbine 01, that is, when the positive displacement main oil pump 30 cannot be driven by the steam turbine 01, an electrically driven auxiliary oil pump provided separately from the positive displacement main oil pump 30 is provided. The main oil tank 0 is used for supplying lubricating oil for pre-lubricating each sliding portion of the steam turbine 01 or cooling each sliding portion by the oil pump 09.
After sucking the lubricating oil in 5 and pressurizing, the auxiliary oil pump 0
No. 9 discharges to a discharge line.
【００２０】これら吐出ライン０７に吐出されて、吐出
ライン０７から油系統ライン０８に供給される潤滑油の
一部は、油系統ライン０８に連結された戻しライン２０
を介して主油タンク０５に返されるようにしている。一
方、主油タンク０５内に収容された潤滑油に、下端が浸
漬された吸込ライン０６の下端部には、戻しライン２０
を介して主油タンク０５内に返される潤滑油の流体力で
作動させるようにしたエゼクタ２１が設けられている。A part of the lubricating oil discharged to the discharge line 07 and supplied from the discharge line 07 to the oil system line 08 is returned to the return line 20 connected to the oil system line 08.
Through the main oil tank 05. On the other hand, a return line 20 is provided at the lower end of the suction line 06 whose lower end is immersed in the lubricating oil stored in the main oil tank 05.
There is provided an ejector 21 which is operated by the fluid force of the lubricating oil returned into the main oil tank 05 via the.
【００２１】このエゼクタ２１は、図２に示すように、
案内部２２、のど部２３および末広部２４からなり、戻
しライン２０から主油タンク０５内に返され、戻しライ
ン２０の先端に設置されたノズル２５から案内部２２に
流速Ｕａで噴出される圧力Ｐｎおよび流量Ｇａの潤滑油
の流れによって、主油タンク０５内の圧力Ｐｓの潤滑油
を吸引して、ノズル２５と案内部２２との隙間には、流
速Ｕｂの流れが生じ、流量Ｇｂの主油タンク０５内の潤
滑油が、戻しライン２０からノズル２５内に噴出された
流量Ｇａの潤滑油とともに吸込ライン０６に流出する。This ejector 21, as shown in FIG.
A pressure which is composed of a guide portion 22, a throat portion 23 and a divergent portion 24, is returned from the return line 20 into the main oil tank 05, and is ejected to the guide portion 22 at a flow rate Ua from a nozzle 25 installed at the end of the return line 20. By the flow of the lubricating oil of Pn and the flow rate Ga, the lubricating oil of the pressure Ps in the main oil tank 05 is sucked, and the flow of the flow velocity Ub is generated in the gap between the nozzle 25 and the guide portion 22, and the main flow of the flow rate Gb The lubricating oil in the oil tank 05 flows out to the suction line 06 together with the lubricating oil having the flow rate Ga ejected into the nozzle 25 from the return line 20.
【００２２】すなわち、流量比μ＝Ｇｂ／Ｇａ、圧力比
σ＝（Ｐｅ−Ｐｓ）／（Ｐｎ−Ｐｅ）としたとき、流量
比μと圧力比σとの間には、流量比μの増大に伴って圧
力比σが低下する、略直線的な関係が成り立ち、吸込ラ
イン０６には、（Ｐｎσ＋Ｐｓ）／（１＋σ）の正圧Ｐ
ｅを発生させることができる。従って、この吸込ライン
０６に発生する正圧Ｐｅを利用することによって、容積
型主油ポンプ３０自身が持っている吸込揚程以上の、主
油ポンプ吸込高さを得ることができるようになる。That is, when the flow ratio μ = Gb / Ga and the pressure ratio σ = (Pe−Ps) / (Pn−Pe), the flow ratio μ increases between the flow ratio μ and the pressure ratio σ. , A substantially linear relationship is established, and a positive pressure P of (Pnσ + Ps) / (1 + σ) is applied to the suction line 06.
e can be generated. Therefore, by utilizing the positive pressure Pe generated in the suction line 06, it becomes possible to obtain a main oil pump suction height higher than the suction head of the positive displacement main oil pump 30 itself.
【００２３】また、圧力比σと流量比μの関係は、ノズ
ル２５の出口面積ｆａと、のど部２３の断面積ｆｔとの
比によって根本的に左右され、エゼクタ２１ののど部２
３の面積に対するノズル出口面積の比である、ｆａ／ｆ
ｔが大きいときは、流量比μが小さく、圧力比σが大、
さらに、この面積比が小さいときは、μが大でσが小と
なるので、エゼクタ２１の設計において、ｆａ／ｆｔの
値が適宜な値になるようにエゼクタ２１を設計すること
によって、上述したように、エゼクタ２１を吸込ライン
０６に設置しない場合、吸込揚程が４〜５ｍであったも
のが、本実施の形態のように、のど部２３の断面積ｆｔ
とノズル部２５の出口面積ｆａの比を適宜の値に選定し
たエゼクタ２１を、吸込ライン０６の下端部に設けるこ
とによって、吸込揚程を略２倍程度にまで大きくするこ
とができる。The relationship between the pressure ratio .sigma. And the flow ratio .mu. Is fundamentally determined by the ratio between the outlet area fa of the nozzle 25 and the cross-sectional area ft of the throat portion 23.
3, which is the ratio of the nozzle exit area to the area of 3
When t is large, the flow ratio μ is small, the pressure ratio σ is large,
Further, when this area ratio is small, μ is large and σ is small. Therefore, in the design of the ejector 21, the ejector 21 is designed so that the value of fa / ft becomes an appropriate value. As described above, when the ejector 21 is not installed in the suction line 06, the suction lift is 4 to 5 m, but the cross-sectional area ft of the throat 23 is changed as in the present embodiment.
By providing the ejector 21 in which the ratio of the outlet area fa of the nozzle section 25 to an appropriate value is provided at the lower end of the suction line 06, the suction lift can be increased to about twice.
【００２４】さらに、容積型主油ポンプ３０の吸込揚程
を大きくする必要がある場合は、このエゼクタ２１を２
段にわたって設けて、エゼクタ２１によって吸込ライン
０６に発生する正圧Ｐｅを、さらに大きくできて吸込揚
程をさらに大きくすることができる。Further, if it is necessary to increase the suction lift of the positive displacement main oil pump 30,
The positive pressure Pe generated in the suction line 06 by the ejector 21 can be further increased over the stages, so that the suction lift can be further increased.
【００２５】このように、本実施の形態の主機駆動主油
ポンプによれば、主機駆動主油ポンプである、容積型主
油ポンプ３０の吸込ライン０６管にエゼクタ２１を設
け、容積型主油ポンプ３０から油系統ライン０８に吐出
される潤滑油の一部を、また蒸気タービン０１が作動し
てない容積型主油ポンプ３０の非作動時には、補助油ポ
ンプ０９から油系統ライン０８に吐出される潤滑油の一
部を、このエゼクタ２１に注入し、作動させることによ
り吸込ライン０６内の負圧を、エゼクタ２１の作動で発
生する正圧Ｐｅによって、若干正圧側へ高めることによ
り、容積型主油ポンプ３０の吸込揚程を大きくする事が
出来る。As described above, according to the main engine driving main oil pump of the present embodiment, the ejector 21 is provided in the suction line 06 of the positive displacement main oil pump 30, which is the main engine driving main oil pump. A part of the lubricating oil discharged from the pump 30 to the oil system line 08 is discharged from the auxiliary oil pump 09 to the oil system line 08 when the positive displacement main oil pump 30 in which the steam turbine 01 is not operating is not operated. By injecting a part of the lubricating oil into the ejector 21 and operating it, the negative pressure in the suction line 06 is slightly increased to the positive pressure side by the positive pressure Pe generated by the operation of the ejector 21, so that the positive displacement The suction lift of the main oil pump 30 can be increased.
【００２６】これにより、蒸気タービン０１本体と主油
タンク０５の据付位置の相互関係が、容積型主油ポンプ
０２の吸込揚程による制約を受けなくなり、蒸気タービ
ン０１を設置するようにしたプラントの設計上の制約が
緩和されることになる。さらに、エゼクタ２１により容
積型、主油ポンプ３０の吸込ライン０６に正圧を発生さ
せて、吸込揚程を大きくできるので、容積型主油ポンプ
３０の容量を過大とすることなく、高吸込揚程を得るこ
とができるものにすることができ、容積型主油ポンプ３
０の小型化も可能になる。As a result, the mutual relationship between the installation position of the steam turbine 01 and the main oil tank 05 is not restricted by the suction head of the positive displacement main oil pump 02, and the design of the plant in which the steam turbine 01 is installed The above restrictions will be eased. Further, since a positive pressure is generated in the suction line 06 of the positive displacement main oil pump 30 by the ejector 21 to increase the suction lift, a high suction lift can be achieved without increasing the capacity of the positive displacement main oil pump 30. That can be obtained, positive displacement main oil pump 3
0 can be reduced in size.
【００２７】[0027]
【発明の効果】以上説明したように、本発明の主機駆動
主油ポンプは、蒸気タービン等の主機によって、直接若
しくは間接的に駆動される、主機駆動の主油ポンプの吸
込口と主油タンクとの間に設置された吸込ラインの主油
タンク内の吸込部近傍に、主油ポンプの吐出油の一部若
しくは全部を注入することにより、作動させて主油ポン
プの吸込揚程を向上させるエゼクタを設けるものとし
た。これにより、主油ポンプとして吸込揚程を殆んど発
生させることのできない遠心型ポンプが使用できるよう
になり、また、容積型主油ポンプを使用するようにした
場合においても、主油ポンプの吸込揚程以上の下方位置
に主油タンクを設置するようにしても、主油ポンプは主
油タンク内の潤滑油を吸入出来るようになり、主機もし
くは主油ポンプの設置高さを自在に選択することがで
き、従来のプラントの設計等で制約を受けていた不具合
を解消することができる。As described above, the main engine-driven main oil pump of the present invention is directly or indirectly driven by the main engine such as a steam turbine, and has a suction port and a main oil tank of the main engine-driven main oil pump. An ejector that operates the main oil pump by improving the suction lift of the main oil pump by injecting part or all of the discharge oil of the main oil pump into the vicinity of the suction portion in the main oil tank of the suction line installed between Is provided. As a result, a centrifugal pump that can hardly generate a suction lift can be used as the main oil pump, and even when a positive displacement main oil pump is used, the suction of the main oil pump can be performed. Even if the main oil tank is installed below the head, the main oil pump can suck the lubricating oil in the main oil tank, and the installation height of the main engine or main oil pump can be freely selected. Thus, it is possible to solve the problem which is restricted by the conventional plant design or the like.
【００２８】また、本発明の主機駆動主油ポンプは、主
機の駆動部の潤滑等を行うために、主機によって直接駆
動され、駆動部に潤滑油を吐出させるようにした容積型
の主油ポンプの吸込口と主油タンクとの間に設置された
潤滑油の吸込ラインに、主油タンクから吸入され、容積
型主油ポンプによって主機の駆動部に吐出される潤滑油
の一部を分岐させて主機タンクに戻される潤滑油の流体
力で吸引力を発生させ、容積型主油ポンプの吸込揚程を
向上させるようにしたエゼクタを設けるものとした。The main engine driven main oil pump according to the present invention is a positive displacement main oil pump driven directly by the main engine to discharge the lubricating oil to the driving section in order to lubricate the driving section of the main engine. A part of the lubricating oil sucked from the main oil tank and discharged to the drive unit of the main engine by the positive displacement main oil pump is branched into the lubricating oil suction line installed between the suction port of the main oil tank and the main oil tank. In addition, an ejector is provided which generates suction force by the fluid force of the lubricating oil returned to the main engine tank to improve the suction lift of the positive displacement main oil pump.
【００２９】これにより、容積型主油ポンプから吐出さ
れ、主油タンクに戻される潤滑油の流体力によりエゼク
タに生じる吸引力によって、吸込揚程が向上し、主油ポ
ンプおよび主油ポンプの設置高さが自在に選択できるよ
うになり、プラントの設計等の制約を受ける不具合を解
消できる。As a result, the suction lift is improved by the suction force generated in the ejector by the fluid force of the lubricating oil discharged from the positive displacement main oil pump and returned to the main oil tank, and the height of the main oil pump and the main oil pump is increased. Can be freely selected, and a problem that is restricted by plant design or the like can be solved.
【００３０】さらに、エゼクタに発生する容積型主油ポ
ンプの吸込揚程が、エゼクタの容量にもよるが、略２倍
の１０ｍ程度になり、容積型主油ポンプの吸込揚程以上
の下方位置に主油タンクを設置するようにしても、主油
ポンプは主油タンク内の潤滑油を吸入出来るようにな
る。Further, the suction head of the positive displacement main oil pump generated in the ejector is approximately doubled to about 10 m, depending on the capacity of the ejector, and the main pump is located at a position lower than the suction head of the positive displacement main oil pump. Even if an oil tank is installed, the main oil pump can suck the lubricating oil in the main oil tank.
【００３１】また、本発明の主機駆動主油ポンプは、エ
ゼクタが、容積型主油ポンプから吐出される潤滑油およ
び主油タンクから吸入され電動補助油ポンプから駆動部
に吐出させる潤滑油の一部を分岐させて主油タンクに戻
される潤滑油によって作動させることができ、容積型主
油ポンプの吸込揚程を大きくできるものにした。In the main engine driven main oil pump according to the present invention, the ejector includes one of a lubricating oil discharged from the positive displacement main oil pump and a lubricating oil sucked from the main oil tank and discharged from the electric auxiliary oil pump to the drive unit. The pump can be operated by lubricating oil returned to the main oil tank by branching the section, and the suction head of the positive displacement main oil pump can be increased.
【００３２】これにより、本発明の主機駆動主油ポンプ
では、主機の始動前もしくは停止後においても、駆動部
の潤滑ができるようになるとともに、主機の停止時にお
いても容積型主油ポンプの吸込揚程を大きくしておくこ
とができ、主機の始動とともに主機ポンプは主油タンク
内の潤滑油を吸入でき、速やかに主油ポンプによって駆
動部への潤滑油の供給ができるようになる。Thus, the main engine driven main oil pump according to the present invention can lubricate the drive unit before or after the main engine is started, and can suction the positive displacement main oil pump even when the main engine is stopped. The head can be increased, and the main engine pump can draw in the lubricating oil in the main oil tank when the main engine starts, so that the main oil pump can quickly supply the lubricating oil to the drive unit.
【図１】本発明の主機駆動主油ポンプの実施の第１形態
を示すブロック図、FIG. 1 is a block diagram showing a first embodiment of a main engine driven main oil pump of the present invention,
【図２】図１に示すエゼクタの詳細を示す断面図、FIG. 2 is a sectional view showing details of the ejector shown in FIG. 1;
【図３】従来の主機駆動主油ポンプの１例を示すブロッ
ク図である。FIG. 3 is a block diagram showing an example of a conventional main engine drive main oil pump.
０１ 蒸気タービン ０２ 容積型主油ポンプ ０３ 吸込口 ０４ 吐出口 ０５ 主油タンク ０６ 吸込ライン ０７ 吐出ライン ０８ 油系統ライン ０９ 補助油ポンプ ０１０ 架台 ０１１ 逆止弁 ０１２ 吸込マウス ２０ 戻しライン ２１ エゼクタ ２２ 案内部 ２３ のど部 ２４ 末広部 ２５ ノズル ３０ 主油ポンプ 01 steam turbine 02 positive displacement main oil pump 03 suction port 04 discharge port 05 main oil tank 06 suction line 07 discharge line 08 oil system line 09 auxiliary oil pump 010 gantry 011 check valve 012 suction mouth 20 return line 21 ejector 22 guide 23 Throat part 24 Suehiro part 25 Nozzle 30 Main oil pump
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０４Ｆ 5/10 Ｆ０４Ｆ 5/10 Ａ Ｆターム(参考） 3G013 AB00 BB18 BC00 BD46 CA00 CA06 3H044 AA02 BB08 CC06 CC07 DD11 3H071 AA03 BB02 BB13 CC36 CC47 DD32 DD42 DD72 DD89 3H079 AA15 AA23 BB10 CC30 DD02 DD12 DD22 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F04F 5/10 F04F 5/10 A F-term (Reference) 3G013 AB00 BB18 BC00 BD46 CA00 CA06 3H044 AA02 BB08 CC06 CC07 DD11 3H071 AA03 BB02 BB13 CC36 CC47 DD32 DD42 DD72 DD89 3H079 AA15 AA23 BB10 CC30 DD02 DD12 DD22
Claims (3)
ンプにおいて、主油タンクと主油ポンプの吸込口との間
に設置された吸込ラインにエゼクタを設け、前記主油ポ
ンプの吐出油を前記エゼクタに注入することにより、前
記エゼクタを作動させ、前記主油ポンプの吸込揚程を大
きくしたことを特徴とする主機駆動主油ポンプ。In a main engine driven main oil pump driven by a main engine, an ejector is provided in a suction line installed between a main oil tank and a suction port of the main oil pump, and discharge oil of the main oil pump is supplied to the main oil pump. A main engine driven main oil pump characterized in that the ejector is actuated by being injected into the ejector to increase the suction lift of the main oil pump.
によって直接駆動され、前記駆動部に潤滑油を吐出させ
る容積型主油ポンプを設けるようにした主機駆動主油ポ
ンプにおいて、主油タンクと前記容積型主油ポンプの吸
込口との間に設置された吸込ラインに、前記容積型主油
ポンプから吐出される前記潤滑油の一部を分岐させ前記
主油タンクに戻される前記潤滑油で作動し、前記容積型
主油ポンプの吸込揚程を大きくするエゼクタを設けたこ
とを特徴とする主機駆動主油ポンプ。2. A main engine driving main oil pump which is directly driven by the main engine to lubricate a driving section of the main engine and which is provided with a positive displacement main oil pump for discharging lubricating oil to the driving section. A part of the lubricating oil discharged from the positive displacement main oil pump is branched into a suction line installed between a tank and a suction port of the positive displacement main oil pump, and the lubrication returned to the main oil tank is returned to the main oil tank. A main engine driven main oil pump, which is provided with an ejector which operates with oil and increases a suction lift of the positive displacement main oil pump.
から吐出される前記潤滑油の一部に加え、前記主油タン
クから吸入され電動補助油ポンプによって前記駆動部に
吐出される前記潤滑油の一部を分岐させ前記主油タンク
に戻される前記潤滑油で作動し、前記容積型主油ポンプ
の吸込揚程を大きくできるものであることを特徴とする
請求項２の主機駆動主油ポンプ。3. The lubricating oil that is ejected from the main oil tank and discharged to the drive unit by an electric auxiliary oil pump in addition to a part of the lubricating oil discharged from the positive displacement main oil pump. 3. The main engine driven main oil pump according to claim 2, wherein the main oil pump is operated by the lubricating oil that branches a part of the main oil tank and is returned to the main oil tank to increase a suction lift of the positive displacement main oil pump. 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10180281A JP2000009040A (en) | 1998-06-26 | 1998-06-26 | Main engine driving main oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10180281A JP2000009040A (en) | 1998-06-26 | 1998-06-26 | Main engine driving main oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000009040A true JP2000009040A (en) | 2000-01-11 |
Family
ID=16080484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10180281A Withdrawn JP2000009040A (en) | 1998-06-26 | 1998-06-26 | Main engine driving main oil pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000009040A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6622495B2 (en) | 2000-07-13 | 2003-09-23 | Mitsubishi Heavy Industries, Ltd. | Ejector and refrigerating machine |
| JP2009047158A (en) * | 2007-07-10 | 2009-03-05 | Voith Patent Gmbh | Method and apparatus for controlling steam cycle |
| FR2961856A1 (en) * | 2010-06-25 | 2011-12-30 | Snecma | Depression setting device for enclosure of aircraft turboshaft engine, has lubrication oil circuit formed by nozzle supplied with fluid and degasification tube connected to oil recovery circuit to set depression of enclosure |
| WO2016136923A1 (en) * | 2015-02-24 | 2016-09-01 | Nobuyoshi Morimoto | Hybrid cargo handling method of oil tanker and cargo pump prime mover system for the method |
-
1998
- 1998-06-26 JP JP10180281A patent/JP2000009040A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6622495B2 (en) | 2000-07-13 | 2003-09-23 | Mitsubishi Heavy Industries, Ltd. | Ejector and refrigerating machine |
| JP2009047158A (en) * | 2007-07-10 | 2009-03-05 | Voith Patent Gmbh | Method and apparatus for controlling steam cycle |
| FR2961856A1 (en) * | 2010-06-25 | 2011-12-30 | Snecma | Depression setting device for enclosure of aircraft turboshaft engine, has lubrication oil circuit formed by nozzle supplied with fluid and degasification tube connected to oil recovery circuit to set depression of enclosure |
| WO2016136923A1 (en) * | 2015-02-24 | 2016-09-01 | Nobuyoshi Morimoto | Hybrid cargo handling method of oil tanker and cargo pump prime mover system for the method |
| JP2018507351A (en) * | 2015-02-24 | 2018-03-15 | 信吉 森元 | Oil tanker hybrid cargo handling method and cargo pump prime mover system used in the method |
| US10189547B2 (en) | 2015-02-24 | 2019-01-29 | Nobuyoshi Morimoto | Hybrid cargo handling method of oil tanker and cargo pump prime mover system for the method |
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