Vertical joint structure of the outer casing and gas turbine

Abstract

The present invention relates to a vertical joint coupling structure of a casing and a gas turbine. In one aspect, a vertical joint coupling structure of a casing is described, which includes a first casing in which a gas flows inside, a second casing connected to the first casing, a vertical joint installed in the second casing and coupled to the first casing, a plurality of bolts fastened to the vertical joint and the first casing, a plurality of jack screws inserted into the vertical joint to secure a gap between the first casing and the vertical joint when the first and second casings are disassembled or assembled, and a shim inserted into the gap between the first casing and the vertical joint.

Description

Technical Field

[0001] This invention discloses a vertical joint connection structure for an outer casing and a gas turbine containing therein. More specifically, a gap is ensured between the vertical joint of the first and second outer casings using jacking screws, thereby enabling the vertical joint connection structure for the outer casing and the gas turbine containing therein to be easily disassembled and assembled even without hydraulic jacks and auxiliary clamps. Background Technology

[0002] A turbine is a mechanical device that uses the flow of compressible fluids such as steam or gas to obtain rotational force through impact or reaction force. It mainly includes steam turbines that use steam and gas turbines that use high-temperature gas.

[0003] A gas turbine mainly includes a compressor, a combustion chamber, and a turbine. The compressor is equipped with an air inlet for introducing air, and multiple compressor stationary blades and compressor blades are arranged in a cross pattern inside the compressor casing.

[0004] The combustion chamber supplies fuel to the compressed air compressed by the compressor and generates high-temperature, high-pressure gas by ignition using a combustion device.

[0005] The turbine has multiple turbine blades and turbine blades arranged in a crisscross pattern within its casing. Furthermore, a rotor is positioned at the center of the compressor, combustion chamber, turbine, and exhaust chamber.

[0006] The rotor is supported by bearings at both ends and can rotate. Furthermore, multiple discs are fixed on the rotor to connect the individual blades, and a drive shaft for a generator or the like is also connected to the end on the exhaust chamber side.

[0007] Because this gas turbine lacks a reciprocating motion mechanism such as a piston in a four-stroke internal combustion engine, it does not have mutual friction parts such as piston-cylinder, and therefore consumes very little lubricating oil. This significantly reduces the amplitude of one of the characteristics of reciprocating motion, thus enabling high-speed motion.

[0008] The following is a brief explanation of the operation of a gas turbine. The compressed air and fuel are mixed and burned to produce high-temperature gas, which is then injected into the turbine side. As the injected gas passes through the turbine blades and turbine vanes, it generates rotational force, thereby driving the rotor to rotate.

[0009] On the other hand, gas turbines consist of multiple interconnected outer shells, and hydraulic jacks are used to ensure the necessary clearance when disassembling or assembling the vertical joints of two shells. However, the use of high-pressure hydraulic jacks presents safety issues and requires additional hydraulic equipment, clamps, and attachments, making the operation complex and time-consuming. Summary of the Invention

[0010] Technical problems to be solved

[0011] The purpose of this invention is to provide a vertical joint connection structure for the outer casing and a gas turbine containing it, which uses jacking screws to ensure a gap between the vertical joint of the first and second outer casings, so that it can be easily disassembled and assembled even without hydraulic jacks and auxiliary clamps.

[0012] Technical solutions to solve technical problems

[0013] The vertical connector assembly structure of the housing of the present invention, which can achieve the stated purpose, includes: a first housing in which gas flows; a second housing connected to the first housing; a vertical connector mounted on the second housing and coupled to the first housing; a plurality of bolts fastened to the vertical connector and the first housing; a plurality of jacking screws inserted into the vertical connector to ensure a gap between the first housing and the vertical connector when the first housing and the second housing are disassembled or assembled; and a gap filler inserted into the gap between the first housing and the vertical connector.

[0014] The vertical connector may include: a hub having a circular tube shape; a plurality of connecting portions radially connected on the outer peripheral surface of the hub; and a connector portion integrally formed at the end of the connecting portions and attached to the second housing.

[0015] The vertical connector may also include a plurality of connecting rods disposed on the outer peripheral surface of the second housing and coupled between the ends of the plurality of connecting parts.

[0016] The connecting rod may include: a pair of flanges fastened to the end sides of the plurality of connecting portions; and a plurality of ribs integrally connected between the pair of flanges.

[0017] The sump packing may include: multiple through holes for the multiple bolts to pass through; and multiple screw slots formed from the edge to allow the lifting screws to pass through.

[0018] The first housing may include: a body portion having a circular tube shape with varying diameter; and a pair of flange portions extending radially from both ends of the body portion along its length.

[0019] The slug can be installed by inserting it between one side flange and the joint.

[0020] The first housing is a turbine housing located downstream of the turbine, and the second housing may be a diffuser.

[0021] A gas turbine according to one embodiment of the present invention includes: a compressor for drawing in and compressing external air; a combustion chamber for mixing and burning the air compressed by the compressor with fuel; and a turbine for rotating by means of the gas discharged from the combustion chamber; the turbine includes: a first housing in which gas flows; a second housing connected to the first housing; a vertical joint mounted on the second housing and coupled to the first housing; a plurality of bolts fastened to the vertical joint and the first housing; a plurality of jacking screws inserted into the vertical joint to ensure a gap between the first housing and the vertical joint when the first housing and the second housing are disassembled or assembled; and a chuck inserted into the gap between the first housing and the vertical joint.

[0022] The vertical connector may include: a hub having a circular tube shape; a plurality of connecting portions radially connected on the outer peripheral surface of the hub; and a connector portion integrally formed at the end of the connecting portions and attached to the second housing.

[0023] The vertical connector may also include a plurality of connecting rods disposed on the outer peripheral surface of the second housing and coupled between the ends of the plurality of connecting parts.

[0024] The plurality of connecting members may include: a pair of flanges fastened to the end sides of the plurality of connecting members; and a plurality of ribs integrally connected between the pair of flanges.

[0025] The sump packing may include: multiple through holes for the multiple bolts to pass through; and multiple screw slots formed from the edge to allow the lifting screws to pass through.

[0026] The first housing may include: a body portion having a circular tube shape with varying diameter; and a pair of flange portions extending radially from both ends of the body portion along its length.

[0027] The slug can be installed by inserting it between one side flange and the joint.

[0028] The first housing may be a turbine housing located downstream of the turbine, and the second housing may be a diffuser.

[0029] Beneficial effects

[0030] According to the aforementioned vertical joint connection structure of the housing and the gas turbine containing it, a gap is ensured between the vertical joints of the first housing and the second housing using jacking screws, so that the vertical joints of the housing can be easily disassembled and assembled even without hydraulic jacks and auxiliary clamps. Attached Figure Description

[0031] Figure 1 This is a partial sectional perspective view of a gas turbine according to an embodiment of the present invention.

[0032] Figure 2 This is a cross-sectional view showing a schematic structure of a gas turbine according to an embodiment of the present invention.

[0033] Figure 3 This is a partial perspective view showing the vertical joint connection structure of the housing according to an embodiment of the present invention.

[0034] Figure 4 This is a perspective view showing a vertical connector according to an embodiment of the present invention.

[0035] Figure 5 This is a partial perspective view showing the connection structure of the first housing and the vertical joint, viewed from the outside in the radial direction.

[0036] Figure 6 This is a partial perspective view showing the connection structure between the first housing and the vertical joint.

[0037] Figure 7 It is a partial cross-sectional view showing the gap between the first housing and the connector ensured by tightening the jacking screws. Detailed Implementation

[0038] This invention can be modified and implemented in various ways. Specific embodiments are illustrated below and described in detail in the description of the invention. However, this is not intended to limit the invention to a specific implementation. All variations, equivalents, and even substitutions included within the scope of the concept and technology of this invention should be interpreted as belonging to this invention.

[0039] The terminology used in this invention is for illustrative purposes only and is not intended to limit the invention. Unless clearly distinguishable in the context of the sentence, expressions not specifically indicating singular or plural include plural cases; for example, the expression "comprising a first housing" can mean "comprising one or more first housings." The terms "comprising" or "having" in this invention merely specify the presence of features, numbers, steps, actions, constituent elements, parts, or combinations thereof described in the specification, and should not be construed as pre-excluding the presence or additional possibilities of one or more other features, numbers, steps, actions, constituent elements, parts, or combinations thereof.

[0040] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In these drawings, the same reference numerals are used as much as possible to indicate the same constituent elements. Furthermore, descriptions of well-known structures or functions that may obscure the spirit of the invention will be omitted. For the same reason, some constituent elements may be exaggerated, schematically illustrated, or omitted in the drawings.

[0041] Figure 1 This is a partial sectional perspective view of a gas turbine according to an embodiment of the present invention. Figure 2This is a cross-sectional view showing a schematic structure of a gas turbine according to an embodiment of the present invention.

[0042] like Figure 1 As shown, a gas turbine 1000 according to one embodiment of the present invention includes a compressor 1100, a combustion chamber 1200, and a turbine 1300. The compressor 1100 has a plurality of blades 1110 arranged radially. The compressor 1100 drives the blades 1110 to rotate, and the rotation of the blades 1110 causes air to be compressed and moved. The size and installation angle of the blades 1110 can vary depending on the installation position. In one embodiment of the present invention, the compressor 1100 is directly or indirectly connected to the turbine 1300, receives a portion of the power generated on the turbine 1300, and can use it for the rotation of the blades 1110.

[0043] The compressed air from the compressor 1100 moves toward the combustion chamber 1200. The combustion chamber 1200 includes a plurality of combustion chambers 1210 arranged in a ring and a fuel nozzle module 1220.

[0044] like Figure 2 As shown, a gas turbine 1000 according to one embodiment of the present invention has a housing 1010, and a diffuser 1400 is provided at the rear of the housing 1010 to discharge the gas that has passed through the turbine. Moreover, a combustion chamber 1200 is arranged at the front of the diffuser 1400 to receive compressed air and burn it.

[0045] Based on the direction of air flow, the compressor section 1100 is located upstream of the casing 1010, while the turbine section 1300 is located downstream. Furthermore, a torque tube unit 1500 is disposed between the compressor section 1100 and the turbine section 1300. This torque tube unit 1500 acts as a torque transmission component, transmitting the rotational torque generated in the turbine section 1300 to the compressor section 1100.

[0046] The compressor section 1100 is provided with a plurality of (e.g., 14) compressor rotor discs 1120, each compressor rotor disc 1120 being fastened in the axial direction without isolation by means of a tie rod 1600.

[0047] Specifically, each compressor rotor disc 1120 is aligned with each other along the axial direction with a tie rod 1600, which forms the axis of rotation, passing through its approximate central portion. Here, adjacent compressor rotor discs 1120 are configured to prevent relative rotation because their opposing surfaces are pressed together by the tie rod 1600.

[0048] The outer circumferential surface of the compressor rotor disk 1120 is radially connected with multiple blades 1110. Each blade 1110 is provided with a dovetail portion 1112 and is fastened to the compressor rotor disk 1120.

[0049] Each rotor disk 1120 is provided with stationary blades (not shown) fixed to the housing. Unlike the rotor disks, the stationary blades are fixed and do not rotate. They guide the flow of compressed air through the blades of the compressor rotor disk to the blades of the downstream rotor disk after regulating the airflow.

[0050] The dovetail portion 1112 can be fastened in either a tangential or axial manner. The method can be selected based on the required structure of the commercial gas turbine, and it can have a well-known dovetail or fir-tree shape. Alternatively, other fastening devices such as keys or bolts can be used to fasten the blades to the rotor disk, depending on the situation.

[0051] The tie rod 1600 is disposed through the center of the plurality of compressor rotor disks 1120 and turbine rotor disk 1320. The tie rod 1600 can be composed of one tie rod or multiple tie rods. One end of the tie rod 1600 is fastened to the compressor rotor disk located at the upstream end, and the other end of the tie rod 1600 is fastened by a fixing nut 1450.

[0052] The form of the tie rod 1600 can be configured in various ways depending on the gas turbine, and therefore is not limited to a specific type. Figure 2 The revealed form can be a single tie rod running through the center of the rotor disk, as shown in the figure, or it can be multiple tie rods arranged on the circumference, or a combination of both.

[0053] Although not illustrated, in order to align the flow angle of the fluid entering the combustion chamber after the fluid pressure is increased with the design flow angle, a stationary blade that acts as a guide vane can be installed in the compressor of a gas turbine at the position below the diffuser. This is called a deswirler.

[0054] The combustion chamber 1200 mixes and burns the incoming compressed air and fuel to generate high-energy, high-temperature, and high-pressure gas. Through the isobaric combustion process, the gas temperature is raised to the heat resistance limit that the combustion chamber and turbine components can withstand.

[0055] Multiple combustion chambers constituting the combustion system of a gas turbine can be arranged inside a shell-shaped casing. Each combustion chamber includes a burner equipped with fuel injection nozzles, a combustion chamber flame tube forming the combustion chamber, and a transition section serving as the connection between the combustion chamber and the turbine.

[0056] Specifically, the flame tube provides a combustion space where fuel injected by the fuel nozzle and compressed air from the compressor mix and burn. The flame tube may include: a tube body providing the combustion space for the combustion of the air-fuel mixture; and a flow guide bushing that encloses the tube body to form an annular space. Furthermore, the front end of the flame tube is connected to a fuel nozzle, and the sidewalls are connected to spark plugs.

[0057] On the other hand, the rear end of the flame tube is connected to a transition section to transfer the combustion gases, which are burned by the spark plug, to the turbine side. The outer wall of this transition section is cooled by compressed air from the compressor to prevent damage from the high temperature of the combustion gases.

[0058] For this purpose, the transition section is provided with cooling holes to inject air into the interior. The compressed air cools the body located inside the interior through the holes and then flows towards the flame tube side.

[0059] The cooling air that has cooled the aforementioned transition section flows in the annular space of the flame tube. Outside the guide bushing, compressed air is supplied as cooling air through the cooling holes provided in the guide bushing and can collide with the outer wall of the flame tube.

[0060] On the other hand, the high-temperature, high-pressure gas from the combustion chamber is supplied to the aforementioned turbine 1300. The supplied high-temperature, high-pressure gas expands and collides with the turbine's rotor blades, generating a reaction force that produces a rotational torque. This rotational torque is then transmitted to the compressor via the aforementioned torque tube. Any power exceeding the power required to drive the compressor is used to drive the generator, etc.

[0061] The turbine 1300 is basically similar in structure to a compressor. That is, the turbine 1300 also has multiple turbine rotor disks 1320 similar to those of a compressor rotor disk. Therefore, each turbine rotor disk 1320 also includes multiple turbine blades 1340 arranged radially. The turbine blades 1340 can also be attached to the turbine rotor disk 1320 in a dovetail-like manner. Simultaneously, turbine level blades 1330 fixed to the housing are also provided between the blades 1340 of the turbine rotor disk 1320 to guide the flow direction of the combustion gas passing through the blades.

[0062] The turbine rotor disk 1320 is roughly disc-shaped, with multiple mating grooves formed on its outer periphery. The mating grooves are formed with a fir-tree-shaped zigzag surface.

[0063] Turbine blade 1340 is fastened to the mating groove. Turbine blade 1340 may have a plateau portion in the shape of a flat plate at a roughly central location. The plateau portion and the plateau portions of adjacent turbine blades function to maintain the spacing between blades because their sides are in contact with each other.

[0064] The bottom surface of the platform portion has a blade root portion. The blade root portion has an axial-type shape that is inserted into the mating groove of the rotor disk 1320 along the axial direction of the rotor disk 1320.

[0065] The leaf root has a bend that roughly resembles a fir tree shape, formed in a manner corresponding to the bend formed in the joint groove. However, the joint structure of the leaf root does not necessarily have to be in the shape of a fir tree; it can also be formed in a swallowtail shape.

[0066] The upper surface of the platform section is formed with blade sections. The blade sections are formed with an airfoil optimized according to the specifications of a gas turbine, and have a leading edge arranged on the upstream side and a trailing edge arranged on the downstream side based on the direction of gas flow.

[0067] Here, unlike the compressor blades, the turbine blades are in direct contact with the high-temperature, high-pressure combustion gas. Since the combustion gas temperature can reach as high as 1700°C, cooling is required. Therefore, a cooling flow path is provided that draws compressed air from a portion of the compressor and supplies it to the turbine blades.

[0068] The cooling flow path can extend outside the housing (external flow path) or extend through the interior of the rotor disk (internal flow path), or both external and internal flow paths can be used. The surface of the blade portion has multiple thin-film cooling holes, which are connected to the cooling flow path (not shown) formed inside the blade portion to supply cooling air to the surface of the blade portion.

[0069] On the other hand, the turbine blades rotate inside the housing using combustion gases, and a gap exists between the tip of the blades and the inner surface of the housing to allow the blades to rotate smoothly. However, as mentioned earlier, combustion gases can leak through this gap, so a sealing mechanism is required to prevent leakage.

[0070] Both turbine blades and stator blades are airfoil-shaped, consisting of a leading edge, trailing edge, suction surface, and pressure surface. The interior of both stator blades and turbine blades contains a complex labyrinthine structure that forms the cooling system. The cooling circuit within the stator blade and the blade itself receives cooling fluid (e.g., air) from the turbine engine's compressor, allowing the fluid to pass through the ends of the stator blade and the blade itself, which are attached to the stator blade and blade holder. The cooling circuit typically includes multiple flow paths designed to maintain a relatively uniform temperature across all surfaces of the turbine blade and the blade itself. At least a portion of the fluid passing through these cooling circuits is discharged through openings in the leading edge, trailing edge, suction surface, and pressure surface of the stator blade.

[0071] The gas turbine 1000 of the present invention has a compressor 1100, a combustion chamber 1200, and a turbine 1300, each with an outer casing. The multiple casings can be connected to each other by multiple fasteners such as bolts and screws.

[0072] Figure 3 This is a partial perspective view showing the vertical joint connection structure of the housing according to an embodiment of the present invention. Figure 4 This is a perspective view illustrating a vertical connector according to an embodiment of the present invention. Figure 5 This is a partial perspective view showing the assembly structure of the first housing and the vertical joint, viewed from the outside in the radial direction. Figure 6 This is a partial perspective view showing the connection structure between the first outer shell and the vertical joint. Figure 7 It is a partial cross-sectional view showing the gap between the first housing and the connector ensured by tightening the jacking screws.

[0073] A vertical connector assembly structure for a housing according to one embodiment of the present invention includes: a first housing 100 in which gas flows; a second housing 200 connected to the first housing; a vertical connector 300 mounted on the second housing and coupled to the first housing; a plurality of bolts 400 fastened to the vertical connector and the first housing; a plurality of jacking screws 450 inserted into the vertical connector to ensure a gap between the first housing and the vertical connector when the first housing and the second housing are disassembled or assembled; and a liner 500 inserted into the gap between the first housing and the vertical connector.

[0074] like Figure 2 and Figure 3 As shown, the first housing 100 can be a turbine housing disposed downstream of the turbine 1300. The first housing 100 may include: a body portion 110 having a circular tube shape with varying diameter; and a pair of flange portions 120 extending radially from both ends of the body portion in the longitudinal direction. The first housing 100 is a turbine housing, and the body portion 110 may have a shape where the diameter of the circular tube is approximately reduced and then increased. The pair of flange portions 120 may be formed by extending radially with an increased diameter on the outer peripheral surfaces at both ends of the body portion 110 in the longitudinal direction.

[0075] The second housing 200 can be a diffuser 1400 connected downstream of the turbine housing. However, the first housing 100 and the second housing 200 are not limited to the turbine housing and the diffuser 1400. The present invention can also be applied to the connection structure between the two housings in other locations, as long as the sprue is inserted into the gap between the two housings and bolted together.

[0076] like Figure 3 and Figure 4 As shown, the vertical connector 300 can be installed in the second housing 200 and coupled to the flange 120 of the first housing 100. The vertical connector 300 can be installed both outside and inside the second housing 200.

[0077] The vertical connector 300 may include: a hub 310 having a circular tube shape; a plurality of connecting portions 320 that are radially connected on the outer peripheral surface of the hub; and a connector portion 330 that is integrally formed at the end of the connecting portion and attached to the second housing 200.

[0078] The hub 310 is located in the center of the diffuser 1400 and can have a circular tube shape.

[0079] Multiple connecting parts 320 can be integrally connected radially on the outer peripheral surface of the hub 310. Figure 4 The illustration shows five connecting parts 320, but the number of connecting parts 320 is not limited to five; it can also be four to six.

[0080] The connector portion 330 can be integrally formed by bending at the outer end of each connecting portion 320. The connector portion 330 can be formed in a way that is roughly "T" shaped when viewed from the outside in the radial direction. Moreover, the connector portion 330 can have a surface on its upstream side in the axial direction that corresponds to the flange portion 120 of the first housing 100.

[0081] like Figure 5 and Figure 6 As shown, multiple bolts 400 can be fastened to the flange 120 of the vertical connector 300 and the first housing 100. Of the multiple bolts 400, a pair of bolts 400 penetrates the vertical connector 300 and the first housing 100 and is fastened to both circumferential sides of the vertical connector 300, while a single bolt 400 penetrates the first housing 100 at the circumferential center of the vertical connector 300 and is fastened to the vertical connector 300. A pair of bolts 400 can consist of a bolt and a nut, while a single bolt 400 can consist only of a bolt with a hexagonal head.

[0082] like Figure 7 As shown, multiple lifting screws 450 can be inserted into the vertical connector 300 during the disassembly or assembly of the first housing 100 and the second housing 200 to ensure a gap between the flange portion 120 of the first housing 100 and the connector portion 330 of the vertical connector 300. Figure 5 and Figure 6 As shown, two lifting screws 450 can be inserted into each of the connector portions 330. The lifting screws 450 are fastened to the screw holes 334 formed through the connector portions 330, allowing the connector portions 330 to move away from the first housing 100. For this purpose, the inner circumferential surface of the screw holes 334 can be formed with threads corresponding to the outer circumferential threads of the lifting screws 450.

[0083] like Figure 5 and Figure 6As shown, the caulking plate 500 can be installed by inserting into the gap between the first housing 100 and the vertical connector 300. The caulking plate 500 is generally formed in the shape of a rectangle with its two long sides corresponding to the outer and inner arcs of the connector portion 330. Each caulking plate 500 is inserted into the connector portion 330 and tightened by the lifting screw 450, thereby widening the gap between the flange portion 120 of the first housing 100 and the connector portion 330 of the vertical connector 300.

[0084] On the other hand, such as Figure 4 As shown, the vertical connector 300 may also include a plurality of connecting rods 350 disposed on the outer peripheral surface of the second housing 200 and coupled between the ends of the plurality of connecting portions 320.

[0085] Multiple connecting rods 350 can be connected between the circumferential sides of multiple connecting parts 320 to support the vertical joint 300 and the second housing 200.

[0086] Each link 350 may include: a pair of flanges 352 fastened to the end sides of a plurality of connecting portions 320; and a plurality of ribs 354 integrally connected between the pair of flanges.

[0087] The flange 352 can be fastened to the circumferential side of the end of the connector 320 by means of multiple bolts.

[0088] Multiple ribs 354 can be integrally connected between a pair of flanges 352. Three ribs 354 can be integrally connected between each pair of flanges 352.

[0089] A connecting rod 350 can be combined between the two connecting parts 320, but it can also be as follows: Figure 4 As shown, the middle part of the connecting rod 350 is separated and each has a flange 352, and they are fastened and connected to each other by bolts and nuts.

[0090] like Figure 6 As shown, the sprue 500 may include: a plurality of through holes 520 for passing through a plurality of bolts 400; and a plurality of screw slots 530 formed from the edge to allow the lifting screws 450 to pass through.

[0091] The body plate 510 of the sprue 500 can be formed in a shape where the two long sides of the rectangle correspond to the outer and inner arcs of the flange 120. The body plate 510 is formed with a certain thickness and can form three through holes 520 and two screw slots 530.

[0092] The through hole 520 can be formed in a circular manner near both ends and the center of the body plate 510.

[0093] The screw slot 530 is cut from the inner edge of the body plate 510 in the radial direction outward and formed between the three through holes 520. With the shape of the screw slot 530, the sizing plate 500 can be inserted or removed without interference even when the lifting screw 450 is tightened.

[0094] The foregoing has described one embodiment of the present invention. However, those skilled in the art to which this invention pertains may modify and alter the present invention in various ways, such as by adding, altering, deleting, or adding constituent elements, without departing from the spirit of the invention as set forth in the claims. All such modifications and alterations should be interpreted as falling within the scope of the claims of this invention.

[0095] List of reference numerals

[0096] 1000: Gas turbine; 1010: Casing

[0097] 1100: Compressor; 1110: Compressor blades

[0098] 1112: Dovetail section; 1120: Compressor rotor disc

[0099] 1200: Combustion chamber; 1210: Combustion cavity

[0100] 1220: Fuel Nozzle Module

[0101] 1300: Turbine; 1320: Turbine rotor disc

[0102] 1330: Transparent blade 1340: Transparent blade

[0103] 1400: Diffuser 1450: Fixing nut

[0104] 1500: Torque tube unit; 1600: Tie rod

[0105] 100: First outer shell

[0106] 110: Body part; 120: Flange part

[0107] 200: Second outer shell

[0108] 300: Vertical joint; 310: Hub

[0109] 320: Connecting part; 330: Joint part

[0110] 332: Fastening hole; 334: Screw hole

[0111] 350: Connecting rod; 352: Flange portion

[0112] 354: Ribs

[0113] 400: Bolt; 450: Pull-up screw

[0114] 500: Gap filler plate; 510: Body plate

[0115] 520: Fastening hole; 530: Screw slot

Claims

1. A vertical head coupling structure of a casing, comprising: a first casing in which gas flows; a second casing coupled to the first casing; a vertical head installed in the second casing and coupled to the first casing; a plurality of bolts fastened to the vertical head and the first casing; a plurality of jack screws inserted into the vertical head to secure a gap between the first casing and the vertical head when the first and second casings are disassembled or assembled; and a gasket inserted into the gap between the first casing and the vertical head, wherein the first casing includes: a body portion having a circular tube shape with a varying diameter; and a pair of flange portions extending in a radial direction at both ends of the body portion in a length direction, wherein the vertical head includes: a hub portion having a circular tube shape; a plurality of connecting portions connected in a radial direction at an outer circumferential surface of the hub portion; and a joint portion integrally formed at an end of the connecting portion and coupled to the second casing, wherein the gasket is formed in a substantially rectangular shape with both long sides corresponding to an outer side arc and an inner side arc of the flange portion, and is installed by being inserted between one flange portion and the joint portion, wherein the gasket includes: a plurality of through holes through which the plurality of bolts pass; and a plurality of screw grooves formed from an edge so as to allow the jack screws to pass, and wherein the plurality of jack screws are fastened to screw holes formed through the joint portion so as to allow the joint portion to move away from the first casing.

2. The vertical head coupling structure of a casing according to claim 1, wherein the vertical head further includes a plurality of link members disposed at an outer circumferential surface of the second casing and coupled between ends of the plurality of connecting portions.

3. The vertical head coupling structure of a casing according to claim 2, wherein the link member includes: a pair of flange portions fastened at side surfaces of the ends of the plurality of connecting portions; and a plurality of rib portions integrally connected between the pair of flange portions.

4. The vertical head coupling structure of a casing according to claim 1, wherein the first casing is a turbine casing disposed downstream of a turbine, and the second casing is a diffuser.

5. A gas turbine, comprising: a compressor which sucks and compresses external air; a combustor which mixes and combusts air compressed by the compressor with fuel; and a turbine which rotates by gas discharged from the combustor, wherein the turbine includes: a first casing in which gas flows; a second casing coupled to the first casing; a vertical head installed in the second casing and coupled to the first casing; a plurality of bolts fastened to the vertical head and the first casing; a plurality of jack screws inserted into the vertical head to secure a gap between the first casing and the vertical head when the first and second casings are disassembled or assembled; and a gasket inserted into the gap between the first casing and the vertical head, wherein the first casing includes: a body portion having a circular tube shape with a varying diameter; and a pair of flange portions extending in a radial direction at both ends of the body portion in a length direction, wherein the vertical head includes: a hub portion having a circular tube shape; a plurality of connecting portions connected in a radial direction at an outer circumferential surface of the hub portion; and a joint portion integrally formed at an end of the connecting portion and coupled to the second casing, wherein the gasket is formed in a substantially rectangular shape with both long sides corresponding to an outer side arc and an inner side arc of the flange portion, and is installed by being inserted between one flange portion and the joint portion, wherein the gasket includes: a plurality of through holes through which the plurality of bolts pass; and a plurality of screw grooves formed from an edge so as to allow the jack screws to pass, and wherein the plurality of jack screws are fastened to screw holes formed through the joint portion so as to allow the joint portion to move away from the first casing. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The vertical joint includes: a hub portion having a circular tube shape; a plurality of connection portions connected in a radial manner on an outer circumferential surface of the hub portion; and a joint portion integrally formed at an end of the connection portion and coupled to the second casing, wherein the gasket is formed in a substantially rectangular shape with two long sides corresponding to the outer and inner arc shapes of the flange portion, and is installed by being inserted between the one side flange portion and the joint portion, wherein the gasket includes: a plurality of through holes through which the plurality of bolts pass; and a plurality of screw grooves formed from an edge so as to allow the jacking screws to pass, and wherein the plurality of jacking screws are fastened to screw holes formed through the joint portion so as to allow the joint portion to move away from the first casing.

6. The gas turbine according to claim 5, wherein: the vertical joint further includes a plurality of link members disposed on an outer circumferential surface of the second casing and coupled between the ends of the plurality of connection portions.

7. The gas turbine according to claim 6, wherein: the plurality of link members include: a pair of flange portions fastened to the end sides of the plurality of connection portions; a plurality of rib portions integrally connected between the pair of flange portions.

8. The gas turbine according to claim 5, wherein: the first casing is a turbine casing disposed downstream of a turbine, the second casing is a diffuser.

Images