Separation tool and method for nozzle section of gas turbine
By designing the nozzle section separation tool and using the design of hydraulic cylinder and push rod to match the barrier pin, the problem of nozzle removal difficulties in gas turbine engines is solved, safe and effective removal in high-temperature and high-pressure environments is achieved, and the maintenance process is simplified.
Patent Information
- Application Number
- CN202410690499.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-07-05
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-07
AI Technical Summary
The removal and replacement of nozzles in gas turbine engines is difficult and time-consuming, especially in high temperature and high pressure environments, and the nozzles are prone to stick together or stuck in the support structure, and the small gap limits the space for mechanical operation.
A nozzle section separation tool is designed, including a support plate, hydraulic cylinder, push rod, nozzle capture plate and barrier pin. Through the cooperation of hydraulic cylinder and push rod, the barrier pin is used to force the nozzle capture plate to contact and separate the adjacent nozzle with the barrier pin. , realize the effective removal of the nozzle.
The tool is able to safely and effectively separate and remove nozzles in high temperature and high pressure environments, simplifying maintenance processes and reducing time and labor intensity.
Smart Images
Figure CN119260654A_ABST
Abstract
Description
Technical Field
[0001] The present application and the resultant patent relate generally to gas turbine engines and, more particularly, to a separation tool for separating adjacent nozzle segments in preparation for removing the nozzle from a casing of the turbine for repair or replacement. Background Art
[0002] Gas turbine engines typically include a compressor for compressing ambient air and a combustor for mixing the air flow with a fuel flow to produce hot combustion gases. The turbine receives the hot combustion gas flow and extracts energy from it to provide power to the compressor and produce output power for external loads such as generators. Turbine components such as turbine nozzles and blades located along the hot gas path are not only subject to high combustion temperatures and pressures, but also to different types of dynamic forces. In view of this, these hot gas path components may be replaced and / or refurbished regularly to ensure efficient and safe performance.
[0003] Removing hot gas components such as nozzles can be difficult and time consuming. Each stage of the nozzle may typically be formed in multiple segments and placed end-to-end on a circumference to form a continuous ring around the casing of the turbine section. The high temperature and high pressure environment may cause the nozzles to stick together and / or become stuck in the supporting structure. However, the small gaps in the turbine section provide very little space to access the nozzles, and the other components provide much less space to apply any type of force to separate the nozzles prior to removal. Summary of the invention
[0004] Thus, the present application and the resulting patent provide a nozzle segment separation tool for use with a pair of adjacent nozzle segments in a housing of a turbine. The nozzle segment separation tool may include a pair of support plates, a hydraulic cylinder positioned within the pair of support plates, a push rod attached to the hydraulic cylinder, a nozzle capture plate positioned within the pair of support plates, and a blocking pin inserted through the housing. The blocking pin forces the nozzle capture plate to engage a first nozzle segment of the pair of adjacent nozzle segments and blocks movement of the push rod such that the nozzle capture plate separates the pair of adjacent nozzle segments.
[0005] The present application and the resulting patent also provide a method of separating a pair of adjacent nozzles in a housing of a turbine. The method may include the steps of sliding a nozzle segment separation tool around the pair of adjacent nozzles; inserting a blocking pin through the housing; forcing a nozzle capture plate of the nozzle segment separation tool to contact one of the pair of adjacent nozzles through the blocking pin; engaging the blocking pin with a push rod of the nozzle segment separation tool; and pulling one of the pair of adjacent nozzles through the nozzle capture plate.
[0006] The present application and the resulting patent may also provide a nozzle segment separation tool for use with a pair of adjacent nozzle segments in a housing of a turbine. The nozzle segment separation tool may include a pair of support plates, a hydraulic cylinder positioned within the pair of support plates, a push rod attached to the hydraulic cylinder, a spring-loaded nozzle capture plate positioned within the pair of support plates, and a blocking pin inserted through the housing. The blocking pin forces the spring-loaded nozzle capture plate to engage a first nozzle segment of the pair of adjacent nozzle segments and blocks movement of the push rod, so that the spring-loaded nozzle capture plate separates the pair of adjacent nozzle segments via a force applied by the hydraulic cylinder.
[0007] These and other features and improvements of the present application and the resultant patent will become apparent to one of ordinary skill in the art upon reading the following detailed description, taken in conjunction with the several drawings and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 is a schematic diagram of a gas turbine engine including a compressor, a combustor, a turbine, and an external load.
[0009] Figure 2 is a schematic diagram of the multiple stages positioned within the casing of the turbine.
[0010] Figure 3 is a perspective view of a nozzle segment separation tool as may be described herein.
[0011] Figure 4 yes Figure 3 Partial cross-sectional view of the nozzle segment separation tool.
[0012] Figure 5 yes Figure 3 A top plan view of the nozzle capture plate of the nozzle segment separation tool.
[0013] Figure 6 It is the nozzle segment separation tool Figure 5 Partial cross-sectional view of the nozzle capture plate.
[0014] Figure 7 yes Figure 3 Front plan view of the shroud plate of the nozzle segment separation tool.
[0015] Figure 8 is with Figure 3 A side plan view of a blocker pin used in conjunction with a nozzle segment separation tool.
[0016] Fig. 9 is a perspective view of a nozzle segment separation tool positioned around a nozzle segment.
[0017] Fig.10 is a partial plan view of the nozzle capture plate of the nozzle segment separation tool in use.
[0018] Fig.11 is another partial plan view of the nozzle capture plate and blocking pins of the nozzle segment separation tool in use.
[0019] Fig.12 is a perspective view of a nozzle segment separation tool in position around a nozzle segment. DETAILED DESCRIPTION
[0020] Referring now to the drawings, wherein like numerals refer to like elements throughout the several views, Figure 1 A schematic diagram of a gas turbine engine 10 that can be used herein is shown. The gas turbine engine 10 may contain a compressor 15. The compressor 15 compresses an incoming air flow 20. The compressor 15 delivers the compressed air flow 20 to a plurality of combustor cans 25. The combustor cans 25 mix the compressed air flow 20 with a pressurized fuel flow 30 and ignite the mixture, thereby producing a hot combustion gas flow 35. Although only a single combustor can 25 is shown, the gas turbine engine 10 may include any number of combustor cans 25 positioned in a circumferential array, etc. Alternatively, the combustor 25 may be an annular combustor. The combustion gas flow 35 is then delivered to a turbine 40. The combustion gas flow 35 drives the turbine 40 to produce mechanical work. The mechanical work produced in the turbine 40 drives the compressor 15 via a rotor shaft 45 and drives an external load 50 (such as a generator, etc.).
[0021] The gas turbine engine 10 can use natural gas, various types of synthetic gas, liquid fuels and / or other types of fuels and blends thereof. The gas turbine engine 10 can be any of a variety of different gas turbine engines provided by General Electric Company of Schenectady, New York, including but not limited to those of heavy-duty gas turbine engines such as the 7 series or 9 series. The gas turbine engine 10 can be part of a single cycle or combined cycle power generation system or other types of power generation systems. The gas turbine engine 10 can have different configurations and can use other types of components. Other types of gas turbine engines can also be used herein. Multiple gas turbine engines, other types of turbines, and other types of power generation equipment can also be used together herein.
[0022] Figure 24 is a partial cross-sectional view of the turbine 40. The turbine 40 includes a plurality of stages 52. In general, each stage 52 includes a fixed row 54 of nozzles 56 and a rotating row 58 of turbine blades 60. In this example, three stages 52 are shown, the first stage, the second stage, and the third stage. The turbine blades 60 in each row 58 are spaced circumferentially around the rotor disk 62 and extend radially outward from the rotor disk. Each rotor disk 62 is coupled to the rotor shaft 45. The turbine casing 64 extends circumferentially around the nozzles 56. The nozzles 56 are each coupled to the turbine casing 64, and each nozzle 56 extends radially inward from the turbine casing 64 toward the rotor shaft 45. Specifically, as will be described in more detail below, the nozzles 56 may be arranged in a plurality of sections 66 and may be attached to the turbine casing 64 via a plurality of shroud grooves 68 in a plurality of shrouds 70. A hot combustion gas path 72 may be defined between the turbine casing 64 and each rotor disk 62.
[0023] Figure 3 An example of a nozzle segment separation tool 100 as described herein is shown. The nozzle segment separation tool 100 may include a pair of support plates 110. The support plates 110 may be made of any substantially rigid material, such as stainless steel, etc. Positioned within the support plates 110 may be a hydraulic cylinder 120, a push rod 130, a nozzle capture plate 140, and connecting elements, as will be described in more detail below.
[0024] The hydraulic cylinder 120 may be of conventional design. Specifically, the hydraulic cylinder 120 may include a hydraulic fluid port 150 and an internal piston 160. The hydraulic cylinder 120 may provide a single stroke or a double stroke. An exemplary hydraulic cylinder may be a 5 ton capacity hydraulic cylinder sold by ENERPAC of Milwaukie, Wisconsin. Other types of hydraulic cylinders, other types of capacities, and other types of push or pull mechanisms may be used herein.
[0025] The push rod 130 may extend from the hydraulic cylinder 120 to below the nozzle capture plate 140 within the support plate 110. The push rod 130 may have an elongated shape and may be positioned at an angle within the support plate 110. The push rod 130 may be made of any type of substantially rigid material, such as stainless steel, etc. Figure 4As shown, the push rod 130 can be coupled to the hydraulic cylinder 120 via a threaded adapter 170 attached to the piston 160 and an L-shaped rod 180 bolted to the push rod 130. Specifically, the threaded adapter 170 and the L-shaped rod 180 can be coupled via a first bolt 190. The push rod 130 and the L-shaped rod 180 can also be coupled by a pair of second bolts 200. The push rod 130 and the L-shaped rod 180 can also be formed as a single element. Other types of connecting devices can be used. A spacer 210 or the like can also be used between the push rod 130 and the L-shaped rod 180. Other components and other configurations can also be used herein.
[0026] The nozzle capture plate 140 may be positioned at the other end of the support plate 110. Figure 5 and Figure 6 As shown, the nozzle capture plate 140 can have a pair of support arms 220 and a pair of capture arms 230. The support arms 220 and the capture arms 230 together form an L-shaped capture surface 240. The bottom of the capture arm 230 can have an inclined surface 250 that is inclined upward toward the push rod 130. The nozzle capture plate 140 can be engaged to the support plate 110 via a pair of pins 260 positioned in slots 270 in the support arms 220. Each slot 270 can have a spring 280 positioned therein that contacts the pin 260. The spring 280 is used to push the nozzle capture plate 140 downward within the support plate 110. The spring plunger 290 can also be used to limit the relative movement of the nozzle capture plate 140. Removing the spring plunger 290 also allows the nozzle capture plate 140 to be replaced for different stages with different configurations. Other components and other configurations can also be used herein.
[0027] The shield plate 300 may be positioned on the other end of the support plate 110 adjacent to the hydraulic cylinder 120. Figure 7 As shown, the shroud plate 300 may have a pair of shroud pins 310 on either side thereof. The shroud pins 310 are sized and positioned to be inserted into the shroud grooves 68 in the turbine shroud 70. The shroud plate 300 and shroud pins 310 are used to stabilize the nozzle segment separation tool 100 when adjacent to the segments 66 of the nozzle 56. Referring again to Figure 3 , the positioning tube 320 may be welded to the support plate 110. The positioning tube 320 may be used to position and move the nozzle segment separation tool 100 relative to the segment 66 of the nozzle 56. Other components and other configurations may also be used herein.
[0028] The nozzle segment separation tool 100 can be used together with the blocking pin 330. Figure 8 As shown, the blocking pin 330 may have a flat surface 340 sized to receive the push rod 130. The blocking pin 330 may be positioned with the turbine housing 64 via a blocking nut 350. Blocking pins 330 of different sizes and shapes may be used for different stages. Other components and other configurations may also be used herein.
[0029] In use, such as Figures 9 to 12 As shown, the nozzle segment separation tool 100 can be inserted into the shroud groove 68 of the turbine shroud 70 via the shroud plate 300 and the shroud pin 310. Likewise, the blocking pin 330 can be inserted into the turbine housing 64 and locked in place with the locking nut 350. When the nozzle segment separation tool 100 is positioned under or around the nozzle 56, the inclined surface 250 of the nozzle capture plate 140 rides along the blocking pin 330 until the capture surface 240 moves beyond the nozzle 56. The nozzle segment separation tool 100 continues to advance until the push rod 130 contacts the flat surface 340 of the blocking pin 330.
[0030] The nozzle segment separation tool 100 can thus be positioned so that the capture surface 240 of the nozzle capture plate 140 contacts the nozzle 56, and the push rod 130 contacts the flat surface 340 of the blocking pin 330. Once the push rod 130 is blocked, the hydraulic cylinder 120 can be activated to pull the support plate 110 and the nozzle capture plate 140 in the direction of arrow 360. This pulling action forces the nozzle 56 and / or nozzle segment 66 to separate. Once separated, the nozzle 56 can be removed in the usual manner.
[0031] It should be apparent that the foregoing relates only to certain embodiments of the present application and the resulting patent. Numerous changes and modifications may be made herein by one of ordinary skill in the art without departing from the general spirit and scope of the invention as defined by the appended claims and their equivalents.
[0032] Further aspects of the invention are provided by the subject matter of the following clauses:
[0033] 1. A nozzle segment separation tool for use with a pair of adjacent nozzle segments in a casing of a turbine, comprising: a pair of support plates; a hydraulic cylinder located within the pair of support plates; a push rod attached to the hydraulic cylinder; a nozzle capture plate located within the pair of support plates; and a blocking pin inserted through the casing, wherein the blocking pin forces the nozzle capture plate to engage a first nozzle segment of the pair of adjacent nozzle segments and blocks movement of the push rod, so that the nozzle capture plate separates the pair of adjacent nozzle segments.
[0034] 2. The nozzle segment separation tool according to any preceding clause, wherein the pair of support plates comprises stainless steel.
[0035] 3. The nozzle segment separation tool according to any preceding clause, wherein the push rod comprises stainless steel.
[0036] 4. The nozzle segment separation tool according to any preceding clause, wherein the hydraulic cylinder and the push rod are connected via a threaded adapter.
[0037] 5. The nozzle segment separation tool according to any preceding clause, wherein the hydraulic cylinder and the push rod are connected via an L-shaped rod.
[0038] 6. The nozzle segment separation tool according to any preceding clause, wherein the nozzle capture plate comprises a pair of capture arms and a pair of support arms.
[0039] 7. The nozzle segment separation tool according to any preceding clause, wherein the pair of capture arms and the pair of support arms comprise a capture surface for the first nozzle segment.
[0040] 8. The nozzle segment separation tool according to any preceding clause, wherein the pair of capture arms comprises an inclined surface for the push rod.
[0041] 9. The nozzle segment separation tool according to any preceding clause, wherein each support arm of the pair of support arms comprises a slot having a spring loaded pin therein.
[0042] 10. The nozzle segment separation tool according to any preceding clause, wherein the nozzle capture plate includes a spring plunger therein.
[0043] 11. The nozzle segment separation tool according to any preceding clause, further comprising a shroud plate positioned adjacent the pair of support plates.
[0044] 12. The nozzle segment separation tool according to any preceding clause, wherein the shroud plate comprises a plurality of shroud pins.
[0045] 13. The nozzle segment separation tool according to any preceding clause, wherein the blocking pin comprises a flat surface for the push rod.
[0046] 14. The nozzle segment separation tool according to any preceding clause, wherein the blocking pin comprises a blocking nut.
[0047] 15. A method for separating a pair of adjacent nozzles in a turbine casing, comprising: sliding a nozzle segment separation tool around the pair of adjacent nozzles; inserting a blocking pin through the casing; forcing a nozzle capture plate of the nozzle segment separation tool to contact one of the pair of adjacent nozzles through the blocking pin; engaging the blocking pin with a push rod of the nozzle segment separation tool; and pulling the one of the pair of adjacent nozzles through the nozzle capture plate.
[0048] 16. A nozzle segment separation tool for use with a pair of adjacent nozzle segments in a turbine housing, comprising: a pair of support plates; a hydraulic cylinder located within the pair of support plates; a push rod attached to the hydraulic cylinder; a spring-loaded nozzle capture plate located within the pair of support plates; and a blocking pin inserted through the housing, wherein the blocking pin forces the spring-loaded nozzle capture plate to engage a first nozzle segment in the pair of adjacent nozzle segments and blocks movement of the push rod, so that the spring-loaded nozzle capture plate separates the pair of adjacent nozzle segments via the hydraulic cylinder.
[0049] 17. The nozzle segment separation tool according to any preceding clause, wherein the pair of support plates and the push rod comprise stainless steel.
[0050] 18. The nozzle segment separation tool of claim 16, wherein the spring loaded nozzle capture plate comprises a pair of capture arms and a pair of support arms.
[0051] 19. The nozzle segment separation tool according to any preceding clause, wherein the pair of capture arms and the pair of support arms comprise a capture surface for the nozzle.
[0052] 20. The nozzle segment separation tool according to any preceding clause, wherein the blocking pin comprises a flat surface for the push rod.
Claims
1. A nozzle segment separation tool (100) for use with a pair of adjacent nozzle segments (66) in a casing (64) of a turbine (40), comprising: a pair of support plates (110); a hydraulic cylinder (120), the hydraulic cylinder being positioned within the pair of support plates (110); a push rod (130) attached to the hydraulic cylinder (120); a nozzle capture plate (140) positioned within the pair of support plates (110); and a blocking pin (330) inserted through the housing (64), wherein the blocking pin (330) forces the nozzle capture plate (140) to engage the first nozzle segment (66) of the pair of adjacent nozzle segments (66) and blocks the movement of the push rod (130), so that the nozzle capture plate (140) separates the pair of adjacent nozzle segments (66).
2. The nozzle segment separation tool (100) according to claim 1, wherein the pair of support plates (110) comprises stainless steel.
3. The nozzle segment separation tool (100) of claim 1, wherein the push rod (130) comprises stainless steel.
4. The nozzle segment separation tool (100) according to claim 1, wherein the hydraulic cylinder (120) and the push rod (130) are connected via a threaded adapter (170).
5. The nozzle segment separation tool (100) according to claim 1, wherein the hydraulic cylinder (120) and the push rod (130) are connected via an L-shaped rod (180).
6. The nozzle segment separation tool (100) according to claim 1, wherein: The nozzle capture plate (140) includes a pair of capture arms (230) and a pair of support arms (220).
7. The nozzle segment separation tool (100) of claim 6, wherein the pair of capture arms (230) and the pair of support arms (220) include a capture surface (240) for the first nozzle segment (66).
8. The nozzle segment separation tool (100) of claim 6, wherein the pair of capture arms (230) includes an inclined surface (250) for the push rod (130).
9. The nozzle segment separation tool (100) of claim 6, wherein each of the pair of support arms (220) includes a slot (270) having a spring loaded pin (260) therein.
10. The nozzle segment separation tool (100) according to claim 1, wherein: The nozzle capture plate (140) includes a spring plunger (290) therein.
11. The nozzle segment separation tool (100) of claim 1, further comprising a shroud plate (300) positioned adjacent the pair of support plates (110).
12. The nozzle segment separation tool (100) of claim 11, wherein the shroud plate (300) comprises a plurality of shroud pins (310).
13. The nozzle segment separation tool (100) according to claim 1, wherein: The blocking pin (330) includes a flat surface (340) for the push rod (130).
14. The nozzle segment separation tool (100) according to claim 1, wherein: The blocking pin (330) includes a blocking nut (350).
15. A method of separating a pair of adjacent nozzles (56) in a casing (64) of a turbine (40), comprising: sliding a nozzle segment separation tool (100) around the pair of adjacent nozzles (56); inserting a blocking pin (330) through the housing (64); forcing a nozzle capture plate (140) of the nozzle segment separation tool (100) to contact one of the pair of adjacent nozzles (56) by means of the blocking pin (330); engaging the blocking pin (330) with the push rod (130) of the nozzle segment separation tool (100); as well as The one nozzle of the pair of adjacent nozzles (56) is pulled by the nozzle capture plate (140).