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JP3586568B2 - Hydraulic control device - Google Patents

Hydraulic control device Download PDF

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Publication number
JP3586568B2
JP3586568B2 JP20655598A JP20655598A JP3586568B2 JP 3586568 B2 JP3586568 B2 JP 3586568B2 JP 20655598 A JP20655598 A JP 20655598A JP 20655598 A JP20655598 A JP 20655598A JP 3586568 B2 JP3586568 B2 JP 3586568B2
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Japan
Prior art keywords
oil
control
path
control oil
hydraulic control
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JP20655598A
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JP2000038905A (en
Inventor
優 高松
秀一 永井
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、ガスタービン、蒸気タービン等、高圧の制御油を用いて油圧制御を行なう原動機における油圧制御装置に関する。
【0002】
【発明が解決しようとする課題】
ガスタービンや蒸気タービンにおける油圧制御用の制御油は、制御弁を迅速作動させ、またサーボ弁へ清浄な制御油を供給する観点から、高圧かつ高い清浄度(例えば圧力100kg/cm でNSA6級の清浄度)が要求される。
また、かかる油圧制御用の制御油は高圧であるため、万一漏洩した際にこれが霧状に飛散して引火し、火災が発生するのを防止するため、通常のタービン油は使用困難とされている。このため、蒸気タービン用の制御油としては、万一漏洩しても引火の恐れの無いリン酸エステル系の難燃性作動油が使用され、またガスタービンにおいても前記タービン油は使用されていない。
【0003】
然るに、前記リン酸エステル系難燃油は、前記のように漏洩に対する安全性は良好であるが、油の中和価の調整を必要とし、そのため活性白土フィルターを通して油の劣化を防止して制御油タンクに戻すことを要する。
また、かかるリン酸エステル系難燃油は高価であり、汎用性も少ないため、随時入手するのが困難とされており、さらには、高価な油であるためこれを洗練するためのポリッシュ装置を必要とする。
【0004】
以上のように、かかる従来技術にあっては、前記リン酸エステル系難燃油を制御油として使用するには、前記のような白土フィルターやポリッシュ装置を使用するため装置が複雑となるとともに、油自体が高価であることと相まって装置コスト及び運転コストが高騰し、さらにはメインテナンスに困難性があり、また油自体が随時入手困難であるという問題点があった。
【0005】
本発明はかかる従来技術の課題に鑑み、前記リン酸エステル系難燃油に代えて、通常のタービン油を火災発生等の危険を伴なうことなく安全に使用可能として、装置コスト及び運転コストが低減され、メインテナンス性が向上した制御油圧装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明はかかる課題を解決するため、その第1発明として、図1に示すように、制御弁、サーボ弁等の油圧制御系の制御油として高圧油を使用する原動機において、
前記制御油にタービン油を使用し、該タービン油を前記油圧制御系に供給する制御油供給路1(1a、1b)と、前記油圧制御系より制御油タンク9へ戻る制御油戻り路6とを具え、
制御油供給路1の上流側が、前記原動機20に直結駆動される主油ポンプ2の吐出側路1aとモータ25により駆動される補助油ポンプ3の吐出側路1bとを並列に設置してなる制御油供給路1(1a、1b)であるとともに、
前記主油ポンプ吐出側路1aと補助油ポンプ吐出側路1b夫々に油圧制御弁10、10を介して前記制御油戻り路6とバイパスするバイパス路21、21を設け、更に主油ポンプ2は前記制御油タンク9へ直接戻る戻り油路31を介装したことを特徴とする油圧制御装置を提案する。
【0007】
また第2発明は、図2に示すように、制御弁、サーボ弁等の油圧制御系の制御油として高圧油を使用する原動機において、
前記制御油にタービン油を使用し、該タービン油を前記油圧制御系に供給する制御油供給路1(1a、1b)と、前記油圧制御系より制御油タンク9へ戻る制御油戻り路6とを具え、
制御油供給路1の上流側が、モータ26により駆動される主油ポンプ2の吐出側路1aとモータ25により駆動される補助油ポンプ3の吐出側路1bとを並列に設置してなる制御油供給路1(1a、1b)であるとともに、
主油ポンプ吐出側路と補助油ポンプ吐出側路の集合点より下流側の制御油供給路に油圧制御弁を介して前記制御油戻り路とバイパスするバイパス路を設け、更に主油ポンプと補助ポンプ夫々に前記制御油タンクへ直接戻る戻り油路31、28を介装したことを特徴とする油圧制御装置を提案する
【0008】
第3発明は前記第1・第2発明に加えて、前記制御油供給路及び前記油圧制御系から制御油タンクへの制御油戻り路に、制御油濾過用のフィルターをそれぞれ設けてなる。
【0009】
かかる発明によれば、通常運転時には、主機あるいはモータで駆動される主油ポンプによって油圧制御系に制御油が所要の流量・圧力で以って供給され、主機の起動時、主油ポンプの故障あるいは能力低下時、制御油量の増加を要する時等には、モータ駆動の補助油ポンプが運転されるので、如何なる運転状態においても、前記2つの油ポンプが並行してあるいは単独に運転されて、通常所要の制御油を油圧制御系に供給できる。
また、制御油は該制御油の油圧制御系への供給路及び油圧制御系からの戻り路の双方に設けたフィルターによって、二重に異物が濾過されることによりその性状が良好に保持される。
【0010】
従って、かかる発明によれば、タービン油を制御油として使用しても、制御油の供給量、供給圧力が正確に制御されるとともに、性状の低下が最少限に保持され、運転操作に誤りや急変があっても制御油の漏れの発生の無い油圧制御装置が得られる。
【0011】
よって、かかる発明によれば、タービン油の使用によっても、制御油の状態が安定した漏れの無い運転が可能となり、リン酸エステル系難燃油使用時における白土フィルターやポリッシュ装置等の装置が不要となり、装置が簡単化されるとともに、装置コストが低減され、また高価なリン酸エステル系難燃油の使用を不要とすることにより運転コストも低減される。さらに、メインテナンスが容易な汎用のタービン油を使用できるので、メインテナンス性も向上する。
【0012】
【発明の実施の形態】
以下、図面を参照して本発明の好適な実施形態を例示的に詳しく説明する。但しこの実施形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がないかぎりは、この発明の範囲をそれに限定する趣旨ではなく、単なる説明例にすぎない。
【0013】
図1は本発明の第1実施形態に係るガスタービン用油圧制御装置の系統図である。
図1において、20はガスタービン即ち主機、2は該主機20に直結駆動される主油ポンプ、3はモータ25に直結駆動される補助油ポンプである。
1aは前記主油ポンプ2からの吐出油路である制御油供給管路、1bは前記補助油ポンプ3からの吐出油路である制御油供給管路であり、この2つの供給路1a及び1bが合流して、油圧制御系(不図示)に接続される制御油供給管路1となっている。
【0014】
従って前記主油ポンプ2と補助油ポンプ3とは制御油供給管路1に対して並列に設けられ、双方の油ポンプ2及び3を同時にあるいは個別に作動可能となっている。
5、5は供給制御油を濾過する供給油フィルターで、前記制御油供給管路1中に並列に2個(1個でも良い)設けられている。22(DP)は前記供給油フィルター5、5前後流間の制御油の差圧を計測するための差圧計である。
【0015】
33は前記主油ポンプ2の吐出圧力監視用の圧力計、34は前記補助油ポンプ3の吐出圧力監視用の圧力計である。
4は前記制御油供給管路1の途中に設けられた蓄圧用のアキュムレータである。
9は制御油が収容される制御油タンク、32は該制御油タンク9と前記主油ポンプ2の吸込口とを接続する主吸込管、27は該制御油タンク9と前記補助油ポンプ3とを接続する補助吸込管である。
【0016】
6は前記油圧制御系からの制御油戻り管路で前記制御油タンク9に接続されている。
7、7は前記戻り管路6中に並列に2個設けられた(1個でもよい)制御油の戻り油濾過用の戻り油フィルターである。
23(DP)は前記戻り油フィルター7、7前後の差圧を計測するための差圧計である。
8は戻り油を冷却するための油冷却器で、前記制御油戻り管路6の前記戻り油フィルター7、7の後流側(制御油タンク9側)に設けられている。
【0017】
21は前記主油ポンプ2側の制御油供給管路1a及び補助油ポンプ3側の制御油供給管路1bと制御油戻り管路6とを接続するバイパス管路、10、10は該バイパス管路21の主油ポンプ側分管21a及び補助ポンプ側分管21bに夫々設けられた油圧制御弁である。
また、31は前記主油ポンプ2からの調圧機構(不図示)からの戻り油を前記制御油タンク9に戻すための戻り油路である。
そしてかかる実施形態においては、制御油としてタービン油を使用している。
尚、図中51は確実なラインエア抜き用のエアブリーザ、52はラインの逆流防止用の逆止弁、53は通常開の手動弁、54は通常閉の手動弁、55はフィルタ目詰り時のライン保護用安全弁、56はタンク9内の油のレベル異常警報用のレベルスイッチ、57はタンクレベル現場計、58はタンクヒータ59のON/OFF用温度スイッチ、60はフィルタ、61は金属物吸着用マグネットである。これらにより本装置の技術的安全さを確実化できる。
【0018】
かかる構成からなるガスタービンの油圧制御装置において、ガスタービン即ち主機20の運転中は、該主機20に直結駆動される主油ポンプ2により制御油タンク9から主吸込管32を介して吸入され、吐出された制御油は、制御油供給管路1a及び1を通り、並列に設けられた供給油フィルター5、5で異物が濾過された後、油圧制御系(不図示)へ送られ、該油圧制御系の作動に供給される。
そして、油圧制御系で使用された後の制御油は制御油戻り管路6を通って戻され、並列に設けられた戻り油フィルター7、7によって再度異物を濾過された後、油冷却器8にて冷却・降温されて制御油タンク9に戻される。
【0019】
また、主機20の起動時、主油ポンプ2の故障あるいは能力低下時、あるいは多くの制御油量を要する際等には電動モータ25駆動の補助油ポンプ3が運転されて制御油タンク9から補助吸込管27を経て制御油を吸入・吐出し制御油供給管路1b及び1を経て油圧制御系に制御油を供給する。
従って如何なる運転状態においても、主・補助の2つのポンプ2、3によって常時所要の制御油が油圧制御系に送られることとなり、安定した油圧制御がなされる。
【0020】
また、前記制御油供給管路1a、1b内の制御油は、バイパス管路21a、21bを通って油圧制御弁10、10に達し、該油圧制御弁10、10によって圧力調整された後、バイパス管路21を通って制御油戻り管路6に溢出することにより、制御油の圧力は所要の圧力に保持される。
尚、制御油供給管路1の圧力の変動はアキュムレータ4によって吸収する。
また、前記供給油フィルター5、5の目詰まりの有無は差圧計22により検知し、戻り油フィルター7、7の目詰まりの有無は差圧計23で検知する。
【0021】
図2は本発明の第2実施形態を示すガスタービンの油圧制御装置の系統図である。
この実施形態においては、主油ポンプ2をモータ26によって直結駆動し、制御油供給管路1a及び1に制御油を供給するように構成されている。尚、28は補助油ポンプ3から制御油タンク9への戻り油路である。
上記以外の構成は図1に示す第1実施形態と同様であり、これと同一の部材は同一の符号にて示す。
【0022】
この実施形態においては、主油ポンプ2をモータ26によって駆動しているので、主機20の運転状態に異常が発生した場合においても、これに支障されることなく制御油を制御油供給管路1a及び1を介して油圧制御系に送り、油圧制御系を安定して作動させることができる。
【0023】
【発明の効果】
以上記載のごとく、本発明によれば、主油ポンプと補助油ポンプとを並列に設けることにより、ガスタービン等の主機の運転状態の変化、主油ポンプの故障や能力低下等の事態に支障されることなく、如何なる運転においても、常時所要の制御油を油圧制御系に供給できるとともに、制御油供給系及び戻り系の双方に設けたフィルターにより制御油の状態を良好に保持することができる。
【0024】
これによって、制御油としてタービン油を使用しても、制御油の供給量、供給圧力が正確に制御されるとともに性状の低下が最少限に保持され、運転操作に誤りや急変があっても、制御油の漏れの無い運転が可能となる。
【0025】
従って、本発明によれば、従来のリン酸エステル系難燃油に代えてタービン油を使用することが可能となり、白土フィルターやポリッシュ装置が不要となって装置が簡単化されるとともに装置コストを低減することができる。
【0026】
また高価で汎用性の無いリン酸エステル系難燃油の使用を不要とし、廉価で汎用性の大なるタービン油を使用することにより、運転コストを低減することができるとともに、メインテナンス性も向上する。
【図面の簡単な説明】
【図1】本発明の第1実施形態に係るガスタービン用油圧制御装置の系統図である。
【図2】本発明の第2実施形態に係るガスタービン用油圧制御装置の系統図である。
【符号の説明】
1、1a、1b 制御油供給管路
2 主油ポンプ
3 補助油ポンプ
4 アキュムレータ
5 供給油フィルター
6 制御油戻り管路
7 戻り油フィルター
8 油冷却器
9 制御油タンク
10 油圧制御弁
20 主機
21、21a、21b バイパス管路
22、23 差圧計
25、26 モータ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hydraulic control device for a prime mover such as a gas turbine or a steam turbine that performs hydraulic control using high-pressure control oil.
[0002]
[Problems to be solved by the invention]
Control oil for oil pressure control in gas turbines and steam turbines has a high pressure and a high degree of cleanliness (for example, NSA class 6 at a pressure of 100 kg / cm 2) from the viewpoint of quickly operating a control valve and supplying clean control oil to a servo valve. Cleanliness) is required.
In addition, since the control oil for hydraulic control is at a high pressure, it is difficult to use ordinary turbine oil in order to prevent the oil from being scattered in the form of a mist and igniting in the event of a leak. ing. For this reason, as a control oil for a steam turbine, a phosphate ester-based flame-retardant hydraulic oil that does not cause ignition even if it leaks is used, and the turbine oil is not used in a gas turbine. .
[0003]
However, the phosphate ester-based flame-retardant oil has good safety against leakage as described above, but requires adjustment of the neutralization value of the oil. It needs to be returned to the tank.
In addition, such phosphate ester-based flame-retardant oils are expensive and have low versatility, so it is considered difficult to obtain them at any time. Further, since they are expensive oils, a polishing device is required to refine them. And
[0004]
As described above, in the related art, in order to use the phosphate ester-based flame-retardant oil as a control oil, the device becomes complicated because the above-described clay filter or polish device is used, and the oil is used. In addition to the fact that the oil itself is expensive, there has been a problem that the equipment cost and the operating cost have increased, the maintenance has been difficult, and the oil itself has been difficult to obtain at any time.
[0005]
In view of the problems of the prior art, the present invention makes it possible to safely use ordinary turbine oil in place of the phosphate-based flame-retardant oil without danger such as fire occurrence, thereby reducing equipment cost and operation cost. It is an object of the present invention to provide a control hydraulic device that is reduced and has improved maintainability.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention, as a first invention, as shown in FIG. 1, in a prime mover using high-pressure oil as a control oil for a hydraulic control system such as a control valve and a servo valve,
A control oil supply path 1 (1a, 1b) that uses turbine oil as the control oil and supplies the turbine oil to the hydraulic control system; and a control oil return path 6 that returns from the hydraulic control system to the control oil tank 9. With
On the upstream side of the control oil supply path 1, the discharge side path 1a of the main oil pump 2 directly connected to the prime mover 20 and the discharge side path 1b of the auxiliary oil pump 3 driven by the motor 25 are installed in parallel. Control oil supply path 1 (1a, 1b),
The main oil pump discharge side path 1a and the auxiliary oil pump discharge side path 1b are respectively provided with bypass paths 21 and 21 that bypass the control oil return path 6 via hydraulic control valves 10 and 10, respectively. A hydraulic control device is proposed in which a return oil passage 31 that directly returns to the control oil tank 9 is interposed .
[0007]
Further, as shown in FIG. 2 , the second invention is a motor that uses high-pressure oil as a control oil for a hydraulic control system such as a control valve and a servo valve.
A control oil supply path 1 (1a, 1b) that uses turbine oil as the control oil and supplies the turbine oil to the hydraulic control system; and a control oil return path 6 that returns from the hydraulic control system to the control oil tank 9. With
A control oil in which an upstream side of the control oil supply path 1 is provided in parallel with a discharge side path 1a of a main oil pump 2 driven by a motor 26 and a discharge side path 1b of an auxiliary oil pump 3 driven by a motor 25. Supply path 1 (1a, 1b),
A control oil supply path downstream of the point where the main oil pump discharge side path and the auxiliary oil pump discharge side path meet is provided with a bypass path that bypasses the control oil return path via a hydraulic control valve via a hydraulic control valve. A hydraulic control device is proposed in which return oil passages 31, 28 that return directly to the control oil tanks are interposed in the respective pumps .
[0008]
According to a third aspect of the invention, in addition to the first and second aspects, a filter for filtering control oil is provided in the control oil supply path and the control oil return path from the hydraulic control system to the control oil tank.
[0009]
According to this invention, during normal operation, control oil is supplied at a required flow rate and pressure to the hydraulic control system by the main oil pump driven by the main engine or the motor. Alternatively, when the capacity is reduced, when the control oil amount needs to be increased, the motor-driven auxiliary oil pump is operated, so that the two oil pumps are operated in parallel or independently in any operation state. Usually, required control oil can be supplied to the hydraulic control system.
Further, the properties of the control oil are favorably maintained by the double filtration of foreign matter by the filters provided on both the supply path of the control oil to the hydraulic control system and the return path from the hydraulic control system. .
[0010]
Therefore, according to the invention, even when the turbine oil is used as the control oil, the supply amount and the supply pressure of the control oil are accurately controlled, and the deterioration of the properties is kept to a minimum, and the operation operation may be mistaken. Even if there is a sudden change, it is possible to obtain a hydraulic control device that does not leak control oil.
[0011]
Therefore, according to the invention, even with the use of the turbine oil, the state of the control oil can be stably operated without leakage, and devices such as a clay filter and a polish device when using a phosphate ester-based flame-retardant oil are unnecessary. In addition, the apparatus is simplified, the apparatus cost is reduced, and the operation cost is reduced by eliminating the need for using expensive phosphate ester-based flame retardant oil. Further, since general-purpose turbine oil that is easy to maintain can be used, the maintainability is also improved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only.
[0013]
FIG. 1 is a system diagram of a gas turbine hydraulic control device according to a first embodiment of the present invention.
In FIG. 1, reference numeral 20 denotes a gas turbine, that is, a main engine, reference numeral 2 denotes a main oil pump directly driven to the main engine 20, and reference numeral 3 denotes an auxiliary oil pump directly driven to a motor 25.
1a is a control oil supply line which is a discharge oil passage from the main oil pump 2; 1b is a control oil supply line which is a discharge oil passage from the auxiliary oil pump 3; these two supply lines 1a and 1b Are combined to form a control oil supply line 1 connected to a hydraulic control system (not shown).
[0014]
Therefore, the main oil pump 2 and the auxiliary oil pump 3 are provided in parallel with the control oil supply line 1, and both oil pumps 2 and 3 can be operated simultaneously or individually.
Reference numerals 5 and 5 denote supply oil filters for filtering supply control oil, and two (or one) oil supply filters are provided in the control oil supply pipe 1 in parallel. Reference numeral 22 (DP) denotes a differential pressure gauge for measuring the differential pressure of the control oil between the supply oil filters 5 and 5.
[0015]
33 is a pressure gauge for monitoring the discharge pressure of the main oil pump 2, and 34 is a pressure gauge for monitoring the discharge pressure of the auxiliary oil pump 3.
Reference numeral 4 denotes an accumulator for accumulating pressure provided in the control oil supply pipe 1.
9 is a control oil tank for storing control oil, 32 is a main suction pipe connecting the control oil tank 9 and a suction port of the main oil pump 2, and 27 is a control oil tank 9 and the auxiliary oil pump 3. Auxiliary suction pipe for connecting
[0016]
A control oil return line 6 from the hydraulic control system is connected to the control oil tank 9.
Reference numerals 7 and 7 denote return oil filters provided in parallel in the return line 6 (or one return oil filter) for filtering return oil of control oil.
23 (DP) is a differential pressure gauge for measuring the differential pressure across the return oil filters 7, 7;
Reference numeral 8 denotes an oil cooler for cooling the return oil, which is provided in the control oil return line 6 on the downstream side of the return oil filters 7 and 7 (the control oil tank 9 side).
[0017]
21 is a bypass line connecting the control oil supply line 1a on the main oil pump 2 side and the control oil supply line 1b on the auxiliary oil pump 3 side to the control oil return line 6; Hydraulic control valves provided on the main oil pump side branch pipe 21a and the auxiliary pump side branch pipe 21b of the passage 21, respectively.
Reference numeral 31 denotes a return oil passage for returning the return oil from the pressure adjusting mechanism (not shown) from the main oil pump 2 to the control oil tank 9.
In this embodiment, turbine oil is used as control oil.
In the drawing, reference numeral 51 denotes an air breather for surely bleeding the line air, 52 denotes a check valve for preventing backflow of the line, 53 denotes a normally opened manual valve, 54 denotes a normally closed manual valve, and 55 denotes a filter when the filter is clogged. A line protection safety valve, 56 is a level switch for alarming the oil level in the tank 9, 57 is a tank level on-site meter, 58 is a temperature switch for ON / OFF of a tank heater 59, 60 is a filter, and 61 is a metal object adsorption. It is a magnet for use. These ensure the technical safety of the device.
[0018]
In the gas turbine hydraulic control device having such a configuration, during operation of the gas turbine, that is, the main engine 20, the main oil pump 2 which is directly connected to the main engine 20 is sucked from the control oil tank 9 through the main suction pipe 32, The discharged control oil passes through control oil supply pipes 1 a and 1, and after foreign substances are filtered by supply oil filters 5 and 5 provided in parallel, the control oil is sent to a hydraulic control system (not shown). It is supplied to the operation of the control system.
Then, the control oil used in the hydraulic control system is returned through the control oil return line 6 and foreign substances are again filtered by the return oil filters 7, 7 provided in parallel. Is cooled and the temperature is returned to the control oil tank 9.
[0019]
When the main engine 20 is started, when the main oil pump 2 is out of order, or when the capacity of the main oil pump 2 is reduced, or when a large amount of control oil is required, the auxiliary oil pump 3 driven by the electric motor 25 is operated to control the auxiliary oil pump 9 The control oil is sucked and discharged through the suction pipe 27, and is supplied to the hydraulic control system through the control oil supply pipes 1b and 1.
Therefore, in any operation state, the required control oil is always sent to the hydraulic control system by the two main and auxiliary pumps 2 and 3, and stable hydraulic control is performed.
[0020]
The control oil in the control oil supply pipes 1a and 1b reaches the hydraulic control valves 10 and 10 through the bypass pipes 21a and 21b. The pressure of the control oil is maintained at a required pressure by overflowing the control oil return line 6 through the line 21.
In addition, the fluctuation of the pressure in the control oil supply line 1 is absorbed by the accumulator 4.
The presence or absence of clogging of the supply oil filters 5 and 5 is detected by a differential pressure gauge 22, and the presence or absence of clogging of the return oil filters 7 and 7 is detected by a differential pressure gauge 23.
[0021]
FIG. 2 is a system diagram of a gas turbine hydraulic control device according to a second embodiment of the present invention.
In this embodiment, the main oil pump 2 is directly driven by a motor 26 to supply control oil to the control oil supply pipes 1a and 1. Reference numeral 28 denotes a return oil passage from the auxiliary oil pump 3 to the control oil tank 9.
The configuration other than the above is the same as that of the first embodiment shown in FIG. 1, and the same members are denoted by the same reference numerals.
[0022]
In this embodiment, since the main oil pump 2 is driven by the motor 26, even if an abnormality occurs in the operation state of the main engine 20, the control oil is supplied to the control oil supply line 1a without any trouble. And 1 to the hydraulic control system to stably operate the hydraulic control system.
[0023]
【The invention's effect】
As described above, according to the present invention, by providing the main oil pump and the auxiliary oil pump in parallel, changes in the operation state of the main engine such as a gas turbine, troubles of the main oil pump, performance deterioration, and the like are hindered. In any operation, the required control oil can always be supplied to the hydraulic control system, and the state of the control oil can be favorably maintained by the filters provided in both the control oil supply system and the return system. .
[0024]
As a result, even if the turbine oil is used as the control oil, the supply amount and the supply pressure of the control oil are accurately controlled, and the deterioration of the properties is kept to a minimum. Operation without control oil leakage becomes possible.
[0025]
Therefore, according to the present invention, it is possible to use turbine oil in place of the conventional phosphoric ester-based flame retardant oil, which eliminates the need for a clay filter and a polish device, simplifies the device, and reduces the cost of the device. can do.
[0026]
In addition, the use of expensive and non-versatile phosphate ester-based flame-retardant oil is not required, and the use of inexpensive and highly versatile turbine oil can reduce operating costs and improve maintainability.
[Brief description of the drawings]
FIG. 1 is a system diagram of a gas turbine hydraulic control device according to a first embodiment of the present invention.
FIG. 2 is a system diagram of a gas turbine hydraulic control device according to a second embodiment of the present invention.
[Explanation of symbols]
1, 1a, 1b Control oil supply line 2 Main oil pump 3 Auxiliary oil pump 4 Accumulator 5 Supply oil filter 6 Control oil return line 7 Return oil filter 8 Oil cooler 9 Control oil tank 10 Hydraulic control valve 20 Main engine 21, 21a, 21b Bypass lines 22, 23 Differential pressure gauge 25, 26 Motor

Claims (3)

制御弁、サーボ弁等の油圧制御系の制御油として高圧油を使用する原動機において、
前記制御油にタービン油を使用し、該タービン油を前記油圧制御系に供給する制御油供給路と、前記油圧制御系より制御油タンクへ戻る制御油戻り路とを具え、
制御油供給路の上流側が、前記原動機に直結駆動される主油ポンプの吐出側路とモータにより駆動される補助油ポンプ3の吐出側路とを並列に設置してなる制御油供給路であるとともに、
前記主油ポンプ吐出側路と補助油ポンプ吐出側路夫々に油圧制御弁を介して前記制御油戻り路とバイパスするバイパス路を設け、更に主油ポンプ側に前記制御油タンクへ直接戻る戻り油路を介装したことを特徴とする油圧制御装置。
In motors that use high-pressure oil as control oil for hydraulic control systems such as control valves and servo valves,
A control oil supply path that uses turbine oil for the control oil and supplies the turbine oil to the hydraulic control system; and a control oil return path that returns from the hydraulic control system to the control oil tank.
The upstream side of the control oil supply path is a control oil supply path in which a discharge side path of a main oil pump directly connected to the prime mover and a discharge side path of an auxiliary oil pump 3 driven by a motor are installed in parallel. With
The control oil return path is bypassed with the control oil return path via a hydraulic control valve on each of the main oil pump discharge side path and the auxiliary oil pump discharge side path, and the return oil directly returns to the control oil tank on the main oil pump side. A hydraulic control device characterized by interposing a road .
制御弁、サーボ弁等の油圧制御系の制御油として高圧油を使用する原動機において、
前記制御油にタービン油を使用し、該タービン油を前記油圧制御系に供給する制御油供給路と、前記油圧制御系より制御油タンクへ戻る制御油戻り路とを具え、
制御油供給路の上流側が、モータにより駆動される主油ポンプの吐出側路とモータにより駆動される補助油ポンプ3の吐出側路とを並列に設置してなる制御油供給路であるとともに、
主油ポンプ吐出側路と補助油ポンプ吐出側路の集合点より下流側の制御油供給路に油圧制御弁を介して前記制御油戻り路とバイパスするバイパス路を設け、更に主油ポンプと補助ポンプ夫々に前記制御油タンクへ直接戻る戻り油路を介装したことを特徴とする油圧制御装置。
In motors that use high-pressure oil as control oil for hydraulic control systems such as control valves and servo valves,
A control oil supply path that uses turbine oil for the control oil and supplies the turbine oil to the hydraulic control system; and a control oil return path that returns from the hydraulic control system to the control oil tank.
The upstream side of the control oil supply path is a control oil supply path in which the discharge side path of the main oil pump driven by the motor and the discharge side path of the auxiliary oil pump 3 driven by the motor are installed in parallel,
A control oil supply path downstream of the point where the main oil pump discharge side path and the auxiliary oil pump discharge side path meet is provided with a bypass path that bypasses the control oil return path via a hydraulic control valve via a hydraulic control valve. A hydraulic control device , wherein return oil passages directly returning to the control oil tanks are interposed in the respective pumps .
前記制御油供給路や前記油圧制御系から制御油タンクへの制御油戻り路に、制御油濾過用のフィルターをそれぞれ設けてなる請求項1または2記載の油圧制御装置。3. The hydraulic control device according to claim 1, wherein a filter for filtering control oil is provided in the control oil supply path or a control oil return path from the hydraulic control system to the control oil tank. 4.
JP20655598A 1998-07-22 1998-07-22 Hydraulic control device Expired - Fee Related JP3586568B2 (en)

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CN106237684A (en) * 2016-09-28 2016-12-21 华北电力科学研究院有限责任公司 A kind of thermal power plant's high pressure fireresistant oil system and on off control method thereof

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JP4698852B2 (en) * 2001-02-06 2011-06-08 三菱重工業株式会社 Servo valve cleaning method
JP2004183539A (en) * 2002-12-02 2004-07-02 Toshiba Corp Hydraulic generator
FR2925594B1 (en) * 2007-12-20 2014-05-16 Hispano Suiza Sa SYSTEM FOR CONTROLLING A TURBOMACHINE
KR102505868B1 (en) * 2022-03-24 2023-03-03 주식회사 쉐카이나 Hydraulic failure diagnosis system for power plants and industrial machines

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Publication number Priority date Publication date Assignee Title
CN106237684A (en) * 2016-09-28 2016-12-21 华北电力科学研究院有限责任公司 A kind of thermal power plant's high pressure fireresistant oil system and on off control method thereof
CN106237684B (en) * 2016-09-28 2018-12-18 华北电力科学研究院有限责任公司 A kind of thermal power plant's high pressure fireresistant oil system and its start-up and shut-down control method

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