CN103225520A

CN103225520A - Turbine exhaust diffuser system manways

Info

Publication number: CN103225520A
Application number: CN2013100287242A
Authority: CN
Inventors: D.D.南达; P.E.科贝克
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 2012-01-25
Filing date: 2013-01-25
Publication date: 2013-07-31
Also published as: RU2013102779A; EP2620596A2; JP2013151934A; PL221113B1; PL397899A1; US20130189088A1

Abstract

A turbine exhaust diffuser system (188) includes a plurality of manways (202). The plurality of manways (202) each extend between an outer wall (198) of the turbine exhaust diffuser system (188) and an interior access tunnel (206) of the turbine exhaust diffuser system (188). The plurality of manways (202) extend between the outer wall (198) and the access tunnel (206) at an angle that is not perpendicular to a central axis (105) of the turbine exhaust diffuser system (188).

Description

Gas turbine exhaust diffuser system walkway

The cross reference of related application

The application requires to be called with the name that General Electric Company was submitted and transferred to the name of Deepesh Dinesh Nanda on January 25th, 2012 preference of Poland application No.P-397899 of " TURBINE EXHAUST DIFFUSER SYSTEM MANWAYS ", and this application is attached to herein by the mode that quotes in full.

Technical field

The present invention relates to the gas turbine exhaust diffuser system, and more specifically, relate to the walkway in the gas turbine exhaust diffuser system.

Background technique

Turbine system can comprise the exhaust diffuser system, and this exhaust diffuser system is attached to turbine section at the downstream part of turbine section.This turbine system can be gas turbine system or steam turbine system.For example, gas turbine system combustion fuel and AIR MIXTURES, to produce hot combustion gas, the hot combustion gas that is produced then drives one or more turbines.Particularly, hot combustion gas forces turbine vane rotation, live axle rotation such as (for example, generator) so that one or more load thus.The exhaust diffuser system receives exhaust from turbine.Along with blast air is crossed the convergence path of exhaust diffuser system, the dynamic pressure of blast air can make the static pressure in the exhaust diffuser increase.

The exhaust diffuser system can comprise the walkway, and described walkway radially extends to from outer wall by the exhaust diffuser system and holds interior hub or the inwall that enters the tunnel.The walkway can comprise the pipeline that lubricant oil and/or cooling air are provided to turbine system.Described pipe extension to entering in the tunnel and can limiting to enter and/or use of exhaust diffuser system enters the tunnel, for example enters by access door by stoping.In addition, the layout of walkway can make exhaust center on the mobile and generation wake flow in walkway.Wake flow may cause the vortex of not expecting comes off and this is not expected vortex to come off may influence the structure of exhaust diffuser system.In addition, vortex comes off may increase the pressure loss of exhaust diffuser system, increase the noise of exhaust diffuser system and the overall performance of reduction exhaust diffuser system.

Summary of the invention

To summarize some embodiment of the present invention below.Do not expect that these embodiments produce restriction to the scope of the present invention for required protection, on the contrary, these embodiments only aim to provide the brief overview to possibility form of the present invention.Really, the present invention can comprise may be similar or different with the embodiment who is hereinafter set forth various ways.

In first embodiment, a kind of gas turbine exhaust diffuser system comprises outer wall.This gas turbine exhaust diffuser system also comprises inwall, and inwall forms by assembling inner gateway.Gas turbine exhaust is configured to flow through the zone between outer wall and inwall.This gas turbine exhaust diffuser system comprises the first row of channels, and the first row of channels extends to inwall from outer wall.The first row of channels extends to inwall with such angle from outer wall: this angle not central axis with the gas turbine exhaust diffuser system is vertical.

In a second embodiment, a kind of gas turbine exhaust diffuser system comprises the outer wall of gas turbine exhaust path.This gas turbine exhaust diffuser system also comprises inlet passage, and inlet passage is by the inner wall limit of gas turbine exhaust path.Inlet passage is configured such that the operator can enter inlet passage so that the gas turbine exhaust diffuser system is safeguarded.This gas turbine exhaust diffuser system comprises a plurality of walkwaies, and described a plurality of walkwaies extend to inlet passage from the outer wall of gas turbine exhaust path.Everyone row of channels all extends to inlet passage with such angle from the outer wall of gas turbine exhaust path: this angle not central axis with the gas turbine exhaust diffuser system is vertical.

In the 3rd embodiment, a kind of gas turbine exhaust diffuser system comprises a plurality of walkwaies, and described a plurality of walkwaies enter between the tunnel with inside at outer wall with such angle extends: this angle not central axis with the gas turbine exhaust diffuser system is vertical.

Description of drawings

When the reference accompanying drawing is read hereinafter detailed description, these and other feature, aspect and advantage of the present invention will become better understood, and in the accompanying drawings, similar reference character is the similar part of representative in whole accompanying drawings, wherein:

Fig. 1 is the embodiment's of gas turbine engine a cross-sectional side view;

Fig. 2 is the embodiment's of the combustion turbine exhaust diffuser system that can use with the gas turbine engine of Fig. 1 a perspective view;

Fig. 3 is embodiment's the side view of the combustion turbine exhaust diffuser system of Fig. 2; And

Fig. 4 is the embodiment's of the combustion turbine exhaust diffuser system that can use with the gas turbine engine of Fig. 1 a cross-sectional side view.

Embodiment

Hereinafter will be described one or more specific embodiments of the present invention.For the succinct description to these embodiments is provided, may not can in the specification all features of actual mode of execution be described.Should understand, in the process of any this actual mode of execution of exploitation, as in any engineering or design object, must carry out the specific decision-making of numerous embodiments, with the specific objective (the relevant and commercial relevant constraint of the system of for example observing) of realizing the developer, described specific objective can change along with the mode of execution difference.In addition, will be appreciated that this development may be complicated and consuming time, in any case but, for benefiting from those of ordinary skills of the present invention, this is the normal work to do of design, processing and manufacturing.

When introducing various embodiments' of the present invention element, article " " and " described " are intended to represent to have the one or more elements in the element.Term " comprise " and " having " mean comprise and mean except listed element also may have other element.

As discussed below, some embodiment of gas turbine exhaust diffuser system comprises the walkway that extends through the exhaust diffuser system with such angle: this angle not central axis with the exhaust diffuser system is vertical.For example, the walkway can extend through the exhaust diffuser system with such angle: this angle is with respect to change (for example, the angle between walkway and the central axis can be in the scopes of roughly 95 to 115 degree, 93 to 105 degree or 100 to 120 degree) in the scopes of roughly 5 to 25 degree, 3 to 15 degree or 10 to 30 degree with the vertical line of the central axis of diffuser system.Particularly, in certain embodiments, the walkway can extend through the exhaust diffuser system with such angle: this angle is with respect to the vertical line of the central axis of diffuser system 15 degree roughly.Therefore, the central axis with the exhaust diffuser system is not vertical owing to the walkway, so be used for the amount of space increase that enters the tunnel that the operator enters the exhaust diffuser system.In addition, the walkway system vertical that contrast is had with the central axis of exhaust diffuser system, amplitude that vortex comes off and frequency (that is, centering on the unsettled blast air of walkway) reduce.So, described exhaust diffuser system not only helps safeguarding this exhaust diffuser system by human operators, also improves the operating characteristics of this exhaust diffuser system simultaneously.

Referring now to accompanying drawing and at first with reference to Fig. 1, wherein show the embodiment of gas turbine engine 100.Gas turbine engine 100 is 102 extensions in axial direction.Radial direction 104 shows the central axis 105 outward extending directions from gas turbine engine 100.In addition, circumferential direction 106 shows around the sense of rotation of the central axis 105 of gas turbine engine 100.Gas turbine engine 100 comprises one or more fuel nozzles 108, and described one or more fuel nozzles 108 are positioned at burner portion section 110 inboards.In certain embodiments, gas turbine engine 100 can comprise a plurality of burners 120, and described a plurality of burners 120 are provided with layout with annular (for example, circumferential 106) in burner portion section 110.In addition, each burner 120 can comprise a plurality of fuel nozzles 108, described a plurality of fuel nozzle 108 is provided with annular (for example, circumferential 106) or other setting is connected to the head end of each burner 120 or the head end of close each burner 120.

Air enters by air input part section 122 and is compressed by the compressor 124 of gas turbine engine 100.Pressurized air from compressor 124 then is directed in the burner portion section 110, in burner portion section 110 places, compressor air and fuel mix.The mixture of pressurized air and fuel is usually in burner portion section 110 internal combustion, and to produce the High Temperature High Pressure combustion gas, the High Temperature High Pressure combustion gas that produced are used for producing torque in the turbine section 130 of gas turbine engine 100.As mentioned above, a plurality of burners 120 circlewise (for example, along circumferential 106) be arranged in the burner portion section 110 of gas turbine engine 100.Each burner 120 all comprises transition piece 172, and transition piece 172 guides to hot combustion gas the turbine section 130 of gas turbine engine 100 from burner 120.Particularly, each transition piece 172 all defines the hot gas path of 130 nozzle assembly from burner 120 to turbine section in the first order 174 of the turbine section 130 that is included in gas turbine engine 100 substantially.

As shown in fig. 1, turbine section 130 comprises three independent levels or portion's section 174 (that is, the first order or portion's section), 176 (that is, the second level or portion's section) and 178 (that is, the third level or portion's section, perhaps the most last turbine bucket leaf portion section).Comprise three levels 174,176,178 although be shown, should be appreciated that in other embodiments that turbine section 130 can comprise any amount of level.Each grade 174,176 and 178 all comprises the wheel blade 180 that is attached to rotor wheel 182, and rotor wheel 182 is rotationally attached to axle 184.As understanding, each turbine vane 180 in the turbine vane 180 can be considered to turbine bucket leaf or bucket leaf.Each level 174,176 and 178 also comprises nozzle assembly 186, and nozzle assembly 186 directly is arranged in the upstream end of each group wheel blade 180.Nozzle assembly 186 is towards wheel blade 180 guiding hot combustion gas, and at wheel blade 180 places, hot combustion gas applies power so that wheel blade 180 rotations make axle 184 rotate thus to wheel blade 180.Therefore, wheel blade 180 and axle 184 are along circumferential direction 106 rotations.The heat combustor gas stream is crossed each level in the level 174,176 and 178, thereby applies power to wheel blade 180 in each level 174,176 and 178.Hot combustion gas then can leave in the exhaust diffuser system 188 that gas turbine portion section 130 enters gas turbine engine 100.Exhaust diffuser system 188 reduces the speed from the fluid stream of the discharging combustion gas of gas turbine portion section 130, and increases the static pressure of discharging combustion gas, to increase the merit that is produced by gas turbine engine 100.

In the illustrated embodiment, the most last turbine bucket leaf portion section 178 of turbine section 130 comprises gap 194, gap 194 is positioned at the end of the most last a plurality of turbine bucket impeller leaves 195 (for example, the most last wheel blade 180 of gas turbine portion section 130) and centers between the secure shroud 196 of a plurality of the most last turbine bucket impeller leaves 195 layouts.In addition, the outer wall 198 of exhaust diffuser system 188 extends from secure shroud 196.Pillar 200 is shown against outer wall 198.Pillar 200 is used to support the structure of exhaust diffuser portion section 188.

As shown in the figure, extend between the outer wall 198 of exhaust diffuser system 188 and inwall 204 walkway 202.In certain embodiments, walkway 202 can comprise pipeline or pipe, and described pipeline or pipe are used for the outside transporting fluid from exhaust diffuser system 188, to be used for use in exhaust diffuser system 188.Inwall 204 is formed by the outside that enters tunnel or convergence path 206.In certain embodiments, inwall 204 can extend with not parallel with central axis 105 angle 205.For example, the angle 205 between inwall 204 and the central axis 105 can be that roughly 5 to 10 degree, 3 to 7 degree or 8 to 15 are spent.As described in greater detail below, walkway 202 extends through exhaust diffuser system 188 with not vertical with central axis 105 angle.When exhaust (for example, from the discharging combustion gas of gas turbine portion section 130) when flowing through exhaust diffuser system 188, blast air is directed to leave exhaust diffuser system 188 around walkway 202.So, the vortex generation that comes off may be caused in walkway 202.Yet the amplitude that the vortex in the present embodiment comes off and frequency ratio have in the system of the walkway 202 vertical with central axis 105 low.Therefore, contrast has the system of the walkway 202 vertical with central axis 105, and present embodiment can reduce the pressure loss, reduces noise and improve overall diffuser performance.

Fig. 2 is the embodiment's of combustion turbine exhaust diffuser system 188 a perspective view.Particularly, pillar 200 arranges around the inwall 204 of exhaust diffuser system 188, and radially 104 extends to the outer wall 198 of exhaust diffuser system 188 and structurally support the outer wall 198 of exhaust diffuser system 188 thus from inwall 204.When gas turbine exhaust flowed in the exhaust diffuser system 188, blast air was crossed the zone between inwall 204 and outer wall 198.Therefore, exhaust is flowed around pillar 200, thereby changes blast air.Therefore, the exhaust characteristic that how to flow through exhaust diffuser system 188 is subjected to the shape of pillar 200 and the influence of position.Exhaust is further flowed around one or more walkwaies 202 in exhaust diffuser system 188.Equally, the characteristic how exhaust flows through exhaust diffuser system 188 is subjected to the shape of walkway 202 and the influence of position, as describing in more detail hereinafter.Fig. 3 is the embodiment's of combustion turbine exhaust diffuser system 188 a side view.Fig. 3 shows a plurality of pillars 200 and can how to arrange around the inwall 204 of exhaust diffuser system 188.In addition, walkway 202 is positioned at the rear portion (in exhaust diffuser system 188) of pillar 200.As shown in the figure, also extend between inwall 204 and outer wall 198 walkway 202, and can provide further supporting between inwall 204 and outer wall 198.Particularly, show three walkwaies 202, yet other embodiment of exhaust diffuser system 188 can have still less or more walkway 202.

Fig. 4 is the embodiment's of combustion turbine exhaust diffuser system 188 a cross-sectional side view.Particularly, show two walkwaies 202---the first row of channels 236 and second walkway 238.As mentioned above, walkway 202 extends to inwall 204 and extends through exhaust air flow zone 240 from outer wall 198, flows through exhaust air flow zone 240 from the gas turbine exhaust of turbine section 130.Have the substantially wall of racing track shape although walkway 202 is shown, walkway 202 walls can have any suitable shape (for example, cylindrical, aerofoil profile etc.).In addition, the shape of walkway 202 can be designed to realize centering on the best exhaust air flow of walkway 202.In certain embodiments,

pipeline

241 and 242 can be arranged in and extend to entering the tunnel 206 in the inwall 204 that is limited at exhaust diffuser system 188 in the walkway 202 and from walkway 202.As discussed above,

pipeline

241 and 242 can be used to transport will be by the fluid of gas turbine exhaust diffuser system 188 uses.For example, pipeline 241 can be used for by walkway 236 lubricating fluid (for example, oil) being transported to and enters tunnel 206, uses (for example, being used for lubricating bearings) to be deflated diffuser system 188.As another example, pipeline 242 can be used for by walkway 238 cooling air or fluid transport to entering tunnel 206, to be used to reduce the temperature of the parts in the exhaust diffuser system 188.

Pipeline 241 and 242 extends through from entry site 243 (for example, walkway 202 and the intersection that enters tunnel 206) towards the post area 244 that enters tunnel 206 and enters tunnel 206.As shown in the figure, enter tunnel 206 and form tapered shape, extend from entry site 243 towards post area 244 along with entering tunnel 206, the diameter of this tapered shape totally increases.Therefore, the distance between the

pipeline

241 and 242 246 can be led to the entry site 243 that enters in the tunnel 206 based on pipeline 241 and 242.As understanding, the distance 246 between the

pipeline

241 and 242 can exert an influence to the heat transfer that occurs between pipeline 241 and 242.In addition, distance 246 and

pipeline

241 and 242 and inwall 204 between distance can for example move through the ability that enters tunnel 206 to the operator and exert an influence for maintenance.So, in certain embodiments, extend from outer wall 198 towards inwall 204 with not vertical with central axis 105 angle walkway 202.Extend with not vertical angle by making walkway 202 with central axis 105, the position of walkway 202 can make pipeline 241 with 242 in that to enter diameter that tunnel 206 had bigger when entering tunnel 206 and extend with the angle vertical with central axis 105 than walkway 202, suppose that wherein walkway 202 all extends from the same area of outer wall 198 in both cases.Therefore, distance 246 may increase and to allow to be used for operator mobile space during entering tunnel 206 bigger.For example, distance 246 may increase, because

pipeline

241 and 242 can be from entering diameter entry site 243 extensions bigger than other entry site that tunnel 206 is had.Bigger diameter makes

pipeline

241 and 242 to enter in the tunnel 206 and keep bigger each other distance 246, remain close to inwall 204 and extend towards post area 244 along with extending to.In certain embodiments, the heat transfer between the

pipeline

241 and 242 may increase and reduce along with distance 246.

Enter the distance 248 be

pipeline

241 and 242 and access door 249 (being positioned at the downstream end that enters tunnel 206) between distance, this distance person of being operated is used for entering tunnel 206.As understanding, increase along with entering distance 248, exist bigger space to be used for the operator and enter tunnel 206 by access door 249.In the present embodiment to enter distance 248 bigger than the systems that walkway 202 and central axis 105 vertically extend, suppose equally that wherein walkway 202 is in both cases all from the same area extension of outer wall 198.

Everyone row of channels 202 all has both sides substantially.Particularly, upstream extremity 250 (for example, the side of the walkway 202 of the most close pillar 200) and downstream 252 (for example, away from the side of the walkway 202 of pillar 200).As shown in the figure, (for example can use upstream angle 254, angle between upstream extremity 250 and the central axis 105) or downstream angle 256 (for example, the downstream 252 of walkway 202 and the angle between the central axis 105) angle between walkway 202 and the central axis 105 is described.Upstream angle 254 can be any suitable angle (for example, out of plumb) greater than 90 degree, and downstream angle 256 can be any suitable angle (for example, out of plumb) less than 90 degree.For example, upstream angle 254 can be in roughly in the scopes of 95 to 115 degree, 93 to 105 degree or 100 to 120 degree.Particularly, upstream angle 254 can for roughly 105 the degree.On the other hand, downstream angle 256 can be in roughly in the scopes of 65 to 85 degree, 75 to 87 degree or 60 to 80 degree.Particularly, angle, downstream 256 degree can be 85 degree roughly.In addition, upstream angle 254 and downstream angle 256 supplementary angle (that is, addition equal 180 degree) each other.

As mentioned above, in 100 operation periods of gas turbine engine, blast air is crossed exhaust diffuser system 188.Exhaust enters exhaust diffuser system 188, flows, then flow through exhaust air flow zone 240 and center on walkway 202 before exhaust diffuser system 188 is left in exhaust around pillar 200 and flow.So, the vortex generation that comes off can be caused in walkway 202.Yet the amplitude that vortex comes off and frequency can be than low in the system with walkway 202 vertical with central axis 105.More specifically, because walkway 202 tilts away from impacting blast air, therefore contrast vertical walkway 202, amplitude that vortex comes off and frequency can significantly reduce.

In a word, technique effect of the present invention comprises be provided for the bigger access path that the operator enters tunnel 206 and handles in entering tunnel 206.In addition, along with pipeline moves away from each other in entering tunnel 206, the heat transfer that enters between the pipeline in the tunnel 206 reduces.In addition, the amplitude that comes off of vortex and frequency reduce (for example, less disturbed by the blast air of exhaust diffuser system 188).Therefore, contrast has the system of the walkway 202 vertical with central axis 105, and present embodiment can reduce the pressure loss, reduces noise and improve overall diffuser performance.

This written description usage example has carried out open (comprising optimal mode) to the present invention, and makes those skilled in the art can implement the present invention's (comprising making and use any device or system and any method that execution comprised).Patentable scope of the present invention limits by claim, and other the example that can comprise that those skilled in the art can expect.If this other example has the structural element as broad as long with the literal language of claim, do not have the equivalent structure element of substantive difference if perhaps this other example comprises the literal language with claim, expect that then this other example falls in the scope of claim.

Claims

1. gas turbine exhaust diffuser system, described gas turbine exhaust diffuser system comprises:

Outer wall;

Inwall, described inwall forms by assembling inner gateway, and wherein gas turbine exhaust is configured to flow through the zone between described outer wall and described inwall; And

The first row of channels, described the first row of channels extends to described inwall from described outer wall, and wherein said the first row of channels extends to described inwall with such angle from described outer wall: the described angle not central axis with described gas turbine exhaust diffuser system is vertical.

2. gas turbine exhaust diffuser system according to claim 1 is characterized in that, the angle between described the first row of channels and the described central axis is greater than 95 degree.

3. gas turbine exhaust diffuser system according to claim 1 is characterized in that, the angle between described the first row of channels and the described central axis is in 100 degree between 115 degree.

4. gas turbine exhaust diffuser system according to claim 1, it is characterized in that, described gas turbine exhaust diffuser system comprises second walkway, described second walkway extends to described inwall from described outer wall, and wherein said second walkway extends to described inwall with such angle from described outer wall: the described angle not described central axis with described gas turbine exhaust system is vertical.

5. gas turbine exhaust diffuser system according to claim 4, it is characterized in that, described gas turbine exhaust diffuser system comprises the 3rd walkway, described the 3rd walkway extends to described inwall from described outer wall, and wherein said the 3rd walkway extends to described inwall with such angle from described outer wall: the described angle not described central axis with described gas turbine exhaust system is vertical.

6. gas turbine exhaust diffuser system according to claim 5 is characterized in that, the angle between described the first row of channels, described second walkway and described the 3rd walkway and the described central axis is in roughly 95 degree to roughly between 115 degree.

7. gas turbine exhaust diffuser system according to claim 4 is characterized in that, described second walkway comprises the pipeline that is used for providing to turbo machine lubricating fluid.

8. gas turbine exhaust diffuser system according to claim 5 is characterized in that, described the 3rd walkway comprises the pipeline that is used for providing to turbo machine cooling fluid.

9. gas turbine exhaust diffuser system according to claim 1 is characterized in that, described convergence passway structure becomes to allow the operator to enter described convergence path by access door and moves in described convergence path.

10. gas turbine exhaust diffuser system, described gas turbine exhaust diffuser system comprises:

The outer wall of gas turbine exhaust path;

Inlet passage, described inlet passage are by the inner wall limit of described gas turbine exhaust path, and wherein said inlet passage is configured such that the operator can enter described inlet passage so that described gas turbine exhaust diffuser system is safeguarded; And

A plurality of walkwaies, described a plurality of walkway extends to described inlet passage from the described outer wall of described gas turbine exhaust path, and wherein everyone row of channels all extends to described inlet passage with such angle from the described outer wall of described gas turbine exhaust path: the described angle not central axis with described gas turbine exhaust diffuser system is vertical.

11. gas turbine exhaust diffuser system according to claim 10 is characterized in that, the angle between everyone row of channels and the described central axis is all greater than 95 degree.

12. gas turbine exhaust diffuser system according to claim 10 is characterized in that, the angle between everyone row of channels and the described central axis all is between 100 to 115 degree.

13. gas turbine exhaust diffuser system according to claim 10 is characterized in that described inlet passage comprises conical in shape, described conical in shape has less internal diameter towards the downstream of described inlet passage.

14. gas turbine exhaust diffuser system according to claim 10 is characterized in that, described a plurality of walkwaies comprise the first row of channels, second walkway and the 3rd walkway.

15. a gas turbine exhaust diffuser system, described gas turbine exhaust diffuser system comprises:

A plurality of walkwaies, described a plurality of walkwaies enter between the tunnel with inside at outer wall with such angle extends: the described angle not central axis with described gas turbine exhaust diffuser system is vertical.

16. gas turbine exhaust diffuser system according to claim 15 is characterized in that, everyone row of channels in described a plurality of walkwaies and the angle between the described central axis are all greater than 95 degree.

17. gas turbine exhaust diffuser system according to claim 15 is characterized in that, everyone row of channels in described a plurality of walkwaies and the angle between the described central axis all are between 100 to 115 degree.

18. gas turbine exhaust diffuser system according to claim 15, it is characterized in that, everyone row of channels in described a plurality of walkway all comprises upstream extremity and downstream, and described walkway forms first angle between described upstream extremity and the described central axis and second angle between described downstream and the described central axis.

19. gas turbine exhaust diffuser system according to claim 18 is characterized in that, described first angle is greater than described second angle.

20. gas turbine exhaust diffuser system according to claim 18 is characterized in that, described first angle is between 95 to 110 degree and described second angle is between 70 to 85 degree.