KR20170002469U - Leak tester of nozzle for gas turbine - Google Patents

Leak tester of nozzle for gas turbine Download PDF

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Publication number
KR20170002469U
KR20170002469U KR2020150008650U KR20150008650U KR20170002469U KR 20170002469 U KR20170002469 U KR 20170002469U KR 2020150008650 U KR2020150008650 U KR 2020150008650U KR 20150008650 U KR20150008650 U KR 20150008650U KR 20170002469 U KR20170002469 U KR 20170002469U
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KR
South Korea
Prior art keywords
fuel nozzle
fluid
sealing member
gas turbine
fuel
Prior art date
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KR2020150008650U
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Korean (ko)
Inventor
김학열
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한국남부발전 주식회사
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Priority to KR2020150008650U priority Critical patent/KR20170002469U/en
Publication of KR20170002469U publication Critical patent/KR20170002469U/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/022—Test plugs for closing off the end of a pipe
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/35—Combustors or associated equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/12—Testing on a test bench

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The present invention relates to a leakage detection device for a fuel nozzle for a gas turbine, and more particularly, to a leakage detection device for a fuel nozzle for a gas turbine, comprising a first sealing member for sealingly closing one side of a fuel nozzle which is open to both sides for injecting fuel into compressed air, And a fluid supply part connected to the fluid supply part to check the pressure of the fluid supplied to the inside of the fuel nozzle and to measure a pressure change inside the fuel nozzle And a pressure detecting member for detecting the pressure of the fluid.
Unlike the prior art, the present invention prevents both sides of a fuel nozzle for a gas turbine and injects gas into the fuel nozzle, thereby enabling easy and reliable confirmation of leaks through pressure change. Defects can be prevented.

Figure P2020150008650

Description

TECHNICAL FIELD [0001] The present invention relates to a leakage detection device for a fuel nozzle for a gas turbine,

More particularly, the present invention relates to a leakage detection device for a fuel nozzle for a gas turbine, and more particularly to a leakage detection device for a fuel nozzle for a gas turbine, The present invention relates to a leakage detection device for a fuel nozzle for a gas turbine, which can prevent defects due to gas leakage of fuel nozzles.

Generally, thermal power generation refers to the development of a method of converting thermal energy obtained by burning fossil fuels such as coal, oil, and gas into mechanical energy and then converting it into electrical energy. Combined power generation burns natural gas in a gas turbine, And the exhaust gas is sent to the batch recovery boiler through the exhaust duct to operate the steam turbine with the steam generated in the steam generator.

In the thermal power generation system, there is a power generation system in which steam generated from heat generated by burning fuel is converted into steam and then steam is used to drive a steam turbine connected to the generator, and a power generation system using an internal combustion engine such as a diesel engine And a power generation system using a gas turbine as a prime mover.

Among these thermal power generation and combined power generation systems, a turbine facility such as a steam turbine or a gas turbine is a device for generating electricity by converting the thermal energy of a working medium into mechanical energy in a thermodynamic cycle using operating steam or gas to rotate the generator, Steam turbines and gas turbines are mainly used.

A steam turbine is an engine that converts the thermal energy of high pressure steam into mechanical energy. The operating principle is to accelerate the steam flow by ejecting and expanding the high temperature and high pressure steam produced by the boiler from a nozzle or a fixed blade, And the rotational force generated by the rotation of the rotary vane by the recoil is ultimately converted into electrical energy.

On the other hand, the gas turbine uses combustion gas instead of steam, and is a power generation facility that generates electricity using combustion gas of fuel.

Gas turbine for power generation is a combined use of natural gas and light oil. Compressed air is used for combustion of liquid fuel such as light oil. This compressed air atomizes liquid fuel particles as high-speed atomizing air into small particles to generate This helps complete combustion.

On the other hand, in the case of natural gas combustion, air is supplied to the liquid fuel passage to prevent flame stabilization and backfire, and the air is sucked into the air inlet and compressed by a compressor. In the combustion chamber, natural gas, light oil and air are mixed and burned And the gas turbine is driven by the combustion gas to be generated.

The gas turbine is composed of an air compressor, a combustor and a turbine. When compressed air, which is started by a separate power source, enters the combustion chamber, fuel is injected from the combustion chamber and ignited. And is converted into electric energy by using the rotational force generated by the rotation of the rotating blades due to the reaction of the turbine blades. In the gas turbine installation of such a power plant, the combustion chamber is provided with a fuel nozzle for injecting fuel.

In particular, Korean Utility Model Registration No. 20-0448437 (Registered on Apr. 5, 2010, entitled: Gas Turbine Fuel Nozzle Injection Test Apparatus) provides a prior art for identifying the spray characteristics of individual nozzles.

However, such a conventional nozzle for a gas turbine is difficult to accurately inspect gas leakage with a simple inspection equipment, and it is difficult to secure quality because combustion instability occurs due to gas leakage which is caused due to failure to perform accurate inspection.

The present invention has been conceived to solve the above problems. It is an object of the present invention to provide a gas turbine fuel injection system capable of easily and reliably visually checking whether a fuel nozzle is leaked through a gauge after a gas is injected into a fuel nozzle, And to prevent a failure due to gas leakage of the fuel nozzle, thereby providing a leakage detection device for a fuel nozzle for a gas turbine.

In addition, the present invention is able to accurately check whether a fuel nozzle leaks by immersing a sealed fuel nozzle in a water tank to inspect whether a minute amount of gas is leaking, and thus, the combustion instability due to a minute gas leakage can be confirmed And it is an object of the present invention to provide a leakage detection device for a fuel nozzle for a gas turbine to be eliminated.

According to the present invention, there is provided a leakage detection device for a fuel nozzle for a gas turbine, comprising: a first sealing member sealingly closing one side of a fuel nozzle which opens to both sides so as to guide fuel into compressed air; A second sealing member sealingly closes the other side of the fuel nozzle; A fluid supply unit for supplying a fluid to the inside of the fuel nozzle through the first sealing member to a set pressure; And a pressure detecting member connected to the fluid supply portion to check the pressure of the fluid supplied to the inside of the fuel nozzle and to detect a pressure change inside the fuel nozzle.

The fuel nozzle may be immersed in a water tank so that a minute amount of leakage of the fluid filled in both sides of the fuel nozzle can be confirmed.

The fluid supply part includes an on-off valve for blocking the supply of the fluid into the fuel nozzle or blocking the back flow.

Wherein the first sealing member comprises: a body having channels open to both sides; A flange extending from a circumferential surface of the body and bound to a side of the fuel nozzle; And a convex portion protruding from the body and contacting the open inner side surface of one side of the fuel nozzle to improve the sealing force.

The first sealing member may be fixed to the base plate.

As described above, according to the present invention, the leakage detection device for a fuel nozzle for a gas turbine is configured to prevent both sides of a fuel nozzle for a gas turbine from being leaked through a gauge after the gas is injected into the fuel nozzle, It is possible to easily and surely confirm whether or not the fuel nozzle is leaked due to the gas leakage of the fuel nozzle.

In addition, the present invention is able to accurately check whether a fuel nozzle leaks by immersing a sealed fuel nozzle in a water tank to inspect whether a minute amount of gas is leaking, and thus, the combustion instability due to a minute gas leakage can be confirmed Can be solved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram of a leakage detection device for a fuel nozzle for a gas turbine according to an embodiment of the present invention; Fig.
FIG. 2 is a configuration diagram showing a micro leakage amount detection state of a leakage detection device for a fuel nozzle for a gas turbine according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a fuel cell leakage detecting apparatus for a gas turbine according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions in the present invention, and this may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a configuration diagram of a fuel leakage detecting apparatus for a fuel nozzle for a gas turbine according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a micro leak amount detecting state of a fuel leakage detecting apparatus for a fuel nozzle for a gas turbine according to an embodiment of the present invention Fig.

Referring to FIGS. 1 and 2, a leakage sensing apparatus 100 of a fuel nozzle 10 for a gas turbine according to an embodiment of the present invention includes a first sealing member 110, a second sealing member 120, A supply portion 130 and a pressure detecting member 140. [

The first sealing member 110 serves to seal and close one side of the fuel nozzle 10. [ Particularly, the fuel nozzle 10 is used for a gas turbine, and serves to inject fuel into the compressed air. Thus, the fuel nozzle 10 is formed in a shape open to both sides. Of course, the fuel nozzle 10 can be applied in various shapes and various materials.

In particular, the first sealing member 110 includes a body 112, a flange 114, and a convex portion 116.

The body 112 forms an outer shape of the first sealing member 110 and forms a channel 113 that opens to both sides. One side of the channel 113 is the injection side of the fluid for leakage inspection and the other side of the channel 113 serves to guide the fluid to the fuel nozzle 10 as the discharge side of the fluid.

At this time, the body 112 can be applied in various shapes and various materials.

Here, the fluid is applicable to various gases or liquids.

A fluid supply part 130 is connected to one side of the channel 113. At this time, the fluid supply part 130 is connected to one side of the body 112 while being sealed.

The flange 114 extends from the peripheral surface of the body 112. Thus, the flange 114 is brought into contact with the one side edge of the fuel nozzle 10. Thereafter, one side edge of the flange 114 and the fuel nozzle 10 are bound together by the binding member 115. Thus, the first sealing member 110 and the fuel nozzle 10 are sealed. In particular, the binding member 115 can be applied in various ways such as a bolt.

In addition, although not shown, a packing may be provided between the flange 114 and one side edge of the fuel nozzle 10.

The convex portion 116 protrudes from the body 112 to the other side and comes into contact with the open inner side surface of one side of the fuel nozzle 10. [ Thus, the sealing ability of the contact portion between the body 112 and the fuel nozzle 10 is improved.

Of course, the convex portions 116 can be formed in various ways. The channel 113 is extended to the convex portion 116.

On the other hand, the second sealing member 120 serves to seal the other side of the fuel nozzle 10 in a sealed manner. At this time, the second sealing member 120 may be formed in the same shape as the first sealing member 110, or may be applied as a cap simply by blocking the other side of the fuel nozzle 10. For convenience, the second sealing member 120 is shown schematically.

The fluid supplying part 130 serves to supply the fluid to the inside of the fuel nozzle 10 through the first sealing member 110 up to the set pressure. Here, the fluid supply part 130 may include a hydraulic pump, a compressor, or the like.

In addition, the fluid supply part 130 includes an on-off valve 132 for blocking the fluid from being supplied into the fuel nozzle 10 or flowing back into the fuel nozzle 10.

The open / close valve 132 permits the fluid to be supplied to the fuel nozzle 10 in the open state, and the pressure inside the fuel nozzle 10 is reduced as the fluid is closed in a state filled with the set amount of the fluid inside the fuel nozzle 10 .

Accordingly, the fluid supplying portion 130 including the on-off valve 132 is controlled by the controller 170. [ That is, the controller 170 controls whether the open / close valve 132 is opened or closed and the operation of the hydraulic pump or the compressor of the fluid supplier 130.

In particular, the body 112 or the flange 114 of the first sealing member 110 may be secured to the base plate 160. Then, the first sealing member 110 binds the fuel nozzle 10. Therefore, when the fluid is supplied into the fuel nozzle 10 at a high pressure through the fluid supply part 130, the fuel nozzle 10 can be supported against the jetting pressure of the fuel nozzle 10.

Of course, the base plate 160 can be deformed into various shapes and fixes the first sealing member 110 in various ways.

The pressure detecting member 140 is connected to the fluid supplying unit 130 to check the pressure of the fluid supplied to the inside of the fuel nozzle 10 and detects a change in the pressure inside the fuel nozzle 10. That is, the pressure detecting member 140 is a gauge that detects the pressure inside the fuel nozzle 10 in real time.

Accordingly, the operator can observe the fuel nozzle 10 while observing the fuel nozzle 10 with the first sealing member 110 and the other side with the second sealing member 120 through the pressure detecting member 140, It is possible to check the internal pressure change of the fuel nozzle 10 after the set time or during the set time by supplying the fluid to the set pressure inside the fuel nozzle 10.

At this time, if the fuel nozzle 10 leaks the fluid finely, the pressure detecting member 140 may not accurately detect the pressure change.

Thus, the operator can immerse the fuel nozzle 10 in the water tank 150 so that a minute amount of leakage of the filled fluid can be confirmed while both sides of the fuel nozzle 10 are sealed. Thus, it can be confirmed whether or not the fuel nozzle 10 is leaking. At this time, the fuel nozzle 10 is sealed with the first sealing member 110 at one side, the second side is sealed with the second sealing member 120, and the fluid supplying unit 130 is connected.

In addition, since the fuel nozzle 10 is filled up to the set value in the fluid, the first sealing member 110 is separated from the base plate 160.

In particular, the fluid supply part 130 may supply the fluid into the fuel nozzle 10 through the second sealing member 120. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. I will understand. Therefore, the true technical protection scope of this invention should be determined by the following utility model registration claim range.

10: Fuel nozzle 100: Leak detection device
110: first sealing member 112: body
114: flange 116: convex portion
120: second sealing member 130: fluid-
132: opening / closing valve 140: pressure detecting member
150: water tank 160: base plate

Claims (5)

A first sealing member sealingly closes one side of a fuel nozzle which opens to both sides so as to guide fuel into the compressed air;
A second sealing member sealingly closes the other side of the fuel nozzle;
A fluid supply unit for supplying a fluid to the inside of the fuel nozzle through the first sealing member to a set pressure; And
And a pressure detecting member connected to the fluid supply part to check a pressure of the fluid supplied to the inside of the fuel nozzle and to detect a pressure change inside the fuel nozzle. .
The method according to claim 1,
Wherein the fuel nozzle is immersed in a water tank so that a minute amount of leakage of the fluid filled in both sides of the fuel nozzle can be confirmed.
3. The method according to claim 1 or 2,
Wherein the fluid supply unit includes an on-off valve for blocking the supply of the fluid into the fuel nozzle or the reverse flow of the fluid into the fuel nozzle.
3. The sealing member according to claim 1 or 2, wherein the first sealing member
A body having channels open to both sides;
A flange extending from a circumferential surface of the body and bound to a side of the fuel nozzle; And
And a convex portion protruding from the body and contacting the open inner side surface of one side of the nozzle to improve a sealing force.
The method according to claim 1,
Wherein the first sealing member is fixed to the base plate.



KR2020150008650U 2015-12-30 2015-12-30 Leak tester of nozzle for gas turbine KR20170002469U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111678652A (en) * 2020-06-23 2020-09-18 北京品驰医疗设备有限公司 Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device
KR20210121670A (en) * 2020-03-31 2021-10-08 비오티 주식회사 Apparatus for detecting gas leak and system using the same
US20220065736A1 (en) * 2020-08-28 2022-03-03 General Electric Company Systems and methods for detecting a fuel leak

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210121670A (en) * 2020-03-31 2021-10-08 비오티 주식회사 Apparatus for detecting gas leak and system using the same
CN111678652A (en) * 2020-06-23 2020-09-18 北京品驰医疗设备有限公司 Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device
US20220065736A1 (en) * 2020-08-28 2022-03-03 General Electric Company Systems and methods for detecting a fuel leak
US11940354B2 (en) * 2020-08-28 2024-03-26 Ge Infrastructure Technology Llc Systems and methods for detecting a fuel leak

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