A gas turbine combustor flame tube spray tooling fixture

Abstract

The application discloses a kind of gas turbine combustion chamber flame tube spraying tool clamps in the technical field of spraying tool, including clamping unit, including the abutting component of abutting at flame tube port, grid component is set to the center position of the abutting component, and the lower end of the grid component extends to below the abutting component, eight groups of clamping parts are set on the abutting component and are annularly distributed with the grid component as center circle.This application can stably and effectively clamp the gas turbine combustion chamber flame tube in the preparation process of inner surface thermal barrier coating, guarantee its stability in the spraying process, and through the grid design, increase the channel of air exchange inside and outside the flame tube, improve the cooling efficiency of the flame tube wall, and can adjust the clamping fixing range of the device according to the actual size of the flame tube port, meet more use requirements.

Description

Technical Field

[0001] This invention relates to the field of spraying fixture technology, and in particular to a spraying fixture for the combustion chamber flame tube of a gas turbine. Background Technology

[0002] The three core hot-end components of a gas turbine are turbine blades, combustion chamber, and turbine disk. From an operating perspective, the combustion chamber is the component that withstands the highest temperatures in a gas turbine. It consists of the intake system, casing, flame tube, nozzles, and igniter. Among these, the flame tube is the core component that encloses the main gas flow and is most severely affected by the high-temperature environment and airflow. The mainstream model is the F-class gas turbine, where the combustion chamber flame tube operates at temperatures exceeding 1400℃. The inner surface of the flame tube is coated with a heat barrier coating using plasma spraying technology for thermal insulation.

[0003] Currently, domestic plasma spraying technology can automate the spraying of complex curved surfaces. However, due to the rotating structure of the flame tube, the spraying space for the inner surface coating is limited, making it impossible to guarantee a consistently 90° vertical spraying angle throughout the process. Furthermore, the spraying gas generates turbulence inside the flame tube, which can easily lead to a loose coating structure. In addition, the flame tube is a thin-walled component, resulting in high substrate temperatures during spraying. Therefore, to achieve perfect coating of the thermal barrier coating on the inner surface of the flame tube in a heavy-duty gas turbine combustor, it is necessary to design tooling and fixtures suitable for plasma spraying to ensure precise positioning of the component surface and the performance and quality of the coating during the spraying process. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned gas turbine combustion chamber flame tube spraying tooling fixtures, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a tooling fixture for spraying the combustion chamber flame tube of a gas turbine, which aims to enable the thermal barrier coating on the inner surface of the combustion chamber flame tube to rotate stably coaxially with the spraying worktable during the preparation process, and to cool the flame tube wall during the spraying process.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a clamping unit, comprising an abutting member abutting against the port of the flame tube, a grid member disposed at the center of the abutting member and the lower end of the grid member extending below the abutting member, eight sets of clamping members disposed on the abutting member and arranged in a ring around the grid member, an adjusting member disposed below the abutting member and sleeved below the grid member at its center, and a driving member disposed on one side below the abutting member.

[0007] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the abutting component includes a sleeve located above the grid component, eight sets of arc-shaped plates distributed in a ring below the sleeve, a limiting groove located between each two adjacent sets of the abutting components, and a limiting piece disposed in the limiting groove.

[0008] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the sleeve is a hollow circular tube structure, and the grid component is disposed inside the circular tube structure of the sleeve. The two ends of the limiting piece located in the limiting groove are respectively fixedly connected to the arc-shaped plates on both sides.

[0009] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the grid component includes a central disk located at the center of the sleeve, the central disk extending downward, eight sets of reinforcing ribs distributed in a ring on the outside of the central disk, a limiting disk disposed below the central disk, and an airflow channel passing through the center of the central disk.

[0010] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, wherein: the end of the reinforcing rib is fixedly connected to the inner side of the arc plate, there is a flow groove between each two adjacent sets of reinforcing ribs, and the flow groove is connected to the inside of the sleeve, so that gas can flow in the flow groove and the sleeve.

[0011] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the clamping component includes a slider located in the limiting groove, a clamping plate disposed above the slider, a limiting slot opened laterally on the slider, meshing teeth evenly distributed below the slider, a sliding slot located between each two adjacent sets of meshing teeth, and a friction groove opened on the inner wall of the clamping plate.

[0012] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, wherein: the limiting plate is slidably connected in the limiting slot, and the slider is limited in the vertical direction by the limiting plate, and the two sides of the slider are limited by the arc plate, and can only slide within the limiting groove.

[0013] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the adjusting component includes: a collar sleeved on the central disk, an adjusting disk located outside the collar, eight sets of fixing rods arranged in a ring between the collar and the adjusting disk with the collar as the center, a spiral rack set on the adjusting disk, and multiple sets of teeth evenly distributed on the outer wall of the adjusting disk.

[0014] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, wherein: the worm gear rack has a worm structure and the number of worm turns is two, the upper end of the worm gear rack is located in the sliding groove, and the two sides of the worm gear rack abut against the meshing teeth, and a flow groove is spaced between each two adjacent sets of fixed rods, and the flow groove is connected to the circulation groove.

[0015] As a preferred embodiment of the gas turbine combustion chamber flame tube spraying fixture of the present invention, the driving component includes two sets of fixed ears fixedly connected to the underside of one of the arc-shaped plates, a rotating shaft laterally arranged between the two sets of fixed ears, a helical rack spirally wrapped around the rotating shaft and the outer diameter of the helical rack extending to the teeth, and a knob fixedly arranged at one end of the rotating shaft.

[0016] The beneficial effects of this invention are: it can stably and effectively clamp the gas turbine combustion chamber flame tube during the preparation of the internal surface thermal barrier coating, ensuring its stability during the spraying process; and through the grid design, it increases the channel for air exchange between the inside and outside of the flame tube, improving the cooling efficiency of the flame tube wall; and it can adjust the clamping and fixing range of the device according to the actual size of the flame tube port, meeting more usage needs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 This is a schematic diagram of the overall structure of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0019] Figure 2 This is a schematic diagram of the clamping unit of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0021] Figure 4 This is a schematic diagram of the upward-view structure of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0022] Figure 5 This is a schematic diagram of the abutting component of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0023] Figure 6 This is a schematic diagram of the contact component of the gas turbine combustion chamber flame tube spraying fixture of the present invention from an upward perspective.

[0024] Figure 7 This is a schematic diagram of the clamping component of the gas turbine combustion chamber flame tube spraying fixture of the present invention.

[0025] Figure 8 This is a schematic diagram of the adjustment component of the gas turbine combustion chamber flame tube spraying fixture of the present invention. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] Example 1

[0031] Reference Figures 1-2This invention provides a first embodiment of a gas turbine combustor flame tube spraying fixture. The fixture includes a clamping unit 100, comprising an abutting member 101 abutting against the flame tube port, a grid member 102 disposed at the center of the abutting member 101 with its lower end extending below the abutting member 101, eight sets of clamping members 103 disposed on the abutting member 101 and arranged in a ring around the grid member 102, and a clamping unit 103 disposed below the abutting member 101 with its center positioned... The adjustment component 104 is attached below the grille component 102, and the drive component 105 is located on one side below the abutment component 101. The grille component 102 is fixedly connected to the center of the abutment component 101. The adjustment component 104 is sleeved on the grille component 102, and the two are rotatably connected. The clamping component 103 is slidably connected to the clamping component 103. Because the temperature is too high during the spraying process, the entire tooling fixture is made of high-temperature stainless steel alloy or high-temperature alloy material that can withstand temperatures above 400℃.

[0032] During use, the port of the flame tube is pressed against the contact component 101, so that the grid component 102 is inserted into the flame tube. The rotating adjustment component 104 will push the eight sets of clamping components 103 distributed in a ring on the contact component 101 to gradually move inward and converge. The clamping components 103 moving inward and converge can abut against the outer wall of the flame tube from eight directions, and finally clamp and fix the flame tube to the device. Then, the bottom end of the grid component 102 of the device is connected to the rotating shaft by bolts, so as to achieve the purpose of coaxial rotation with the rotating shaft. The rotating shaft is connected to the spraying worktable, so that the flame tube and the spraying worktable rotate coaxially, so that the spraying angle between the spray gun and the inner surface of the flame tube is always kept at 90°, and the flame tube is kept stable and rotated at a uniform speed during the rotation, so as to realize the automated spraying of the thermal barrier coating on the surface of the gas turbine blade.

[0033] Example 2

[0034] Reference Figures 5-6 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the open connection between the clamp and the flame tube provides a path for air circulation between the inside and outside of the flame tube, thereby improving heat dissipation efficiency.

[0035] Compared to Embodiment 1, the further embodiment includes a sleeve 101a located above the grid component 102, eight sets of arc-shaped plates 101b arranged in a ring below the sleeve 101a, a limiting groove 101c located between each two adjacent sets of abutting components 101, and a limiting piece 101d disposed in the limiting groove 101c. The inner top surfaces of the eight sets of arc-shaped plates 101b are all fixedly connected to the bottom of the sleeve 101a, but the bottom of the sleeve 101a is not blocked, so that it still maintains the hollow tubular structure inside.

[0036] Among them, the sleeve 101a is a hollow circular tube structure, and the grid component 102 is disposed in the circular tube structure of the sleeve 101a. The two ends of the limiting piece 101d located in the limiting groove 101c are fixedly connected to the arc plate 101b on both sides, so the eight sets of arc plates 101b are fixedly connected together by the eight sets of corresponding limiting pieces 101d.

[0037] During use, the sleeve 101a has a structure that is thicker at the top and thinner at the bottom, which facilitates the insertion of the flame tube. The clamping component 103 is located in the limiting slide groove 101c and is limited by the arc plates 101b on both sides of the limiting slide groove 101c. It can only slide within the limiting slide groove 101c. The inner end of the limiting slide groove 101c extends towards the sleeve 101a. Therefore, when the clamping component 103 slides inward or outward within the limiting slide groove 101c, it can perform the action of moving closer to clamping or moving away from the flame tube sleeved on the sleeve 101a.

[0038] The grille component 102 includes a central disk 102a located at the center of the sleeve 101a, with the central disk 102a extending downward, eight sets of reinforcing ribs 102b distributed in a ring on the outside of the central disk 102a, a limiting disk 102c located below the central disk 102a, and an airflow channel 102d that passes through the center of the central disk 102a.

[0039] The end of the reinforcing rib 102b is fixedly connected to the inner side of the arc plate 101b. There is a flow groove 102e between each pair of adjacent reinforcing ribs 102b, and the flow groove 102e is connected to the inside of the sleeve 101a, so that gas can flow in the flow groove 102e and the sleeve 101a.

[0040] During use, the bottom end of the limiting plate 102c is connected to the rotating shaft by a thread. An air extraction pipe is opened inside the rotating shaft and is connected to the airflow channel 102d. The air extraction pipe can be extended into the flame tube through the airflow channel 102d. An air extraction pump is connected to the rear end of the air extraction pipe to suppress the turbulence generated by the sprayed gas inside the flame tube and improve the performance and quality of the thermal barrier coating. The flow groove 102e, which is connected to the inside of the sleeve 101a, keeps the part of the device that abuts against the flame tube port in an open state. The open state setting can promote the rapid flow of gas inside the flame tube, thereby playing an auxiliary role in cooling.

[0041] The remaining structure is the same as that in Example 1.

[0042] Example 3

[0043] Reference Figures 1 to 8This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the purpose of clamping and fixing the flame tube port is achieved by adjusting the convergence range of the clamping component 103, and the purpose of adjusting the clamping range according to the size of the flame tube is realized.

[0044] Compared to Embodiment 2, the clamping component 103 further includes a slider 103a located in the limiting groove 101c, a clamping plate 103b disposed above the slider 103a, a limiting slot 103c laterally opened on the slider 103a, meshing teeth 103d evenly distributed below the slider 103a, a sliding slot 103e located between each adjacent set of meshing teeth 103d, and a friction groove 103f opened on the inner wall of the clamping plate 103b. The friction groove 103f directly contacts the outer wall of the flame tube, which can increase the friction between the two, thereby further increasing the overall clamping and fixing force of the clamping component 103.

[0045] The limiting piece 101d is slidably connected in the limiting slot 103c, and the slider 103a is limited by the vertical direction of the limiting piece 101d. The two sides of the slider 103a are limited by the arc plate 101b, and it can only slide within the limiting groove 101c.

[0046] The adjusting component 104 includes a collar 104a sleeved on the central disk 102a, an adjusting disk 104b located outside the collar 104a, eight sets of fixing rods 104c arranged in a ring between the collar 104a and the adjusting disk 104b with the collar 104a as the center, a spiral rack 104d set on the adjusting disk 104b, and multiple sets of teeth 104e evenly distributed on the outer wall of the adjusting disk 104b.

[0047] The worm gear rack 104d has a worm structure with two worm turns. The upper end of the worm gear rack 104d is located in the sliding groove 103e, and the two sides of the worm gear rack 104d abut against the meshing teeth 103d. There is a flow groove 104f between each pair of adjacent fixed rods 104c, and the flow groove 104f is connected to the flow channel 102e.

[0048] During use, when the adjusting component 104 rotates, the meshing teeth 103d below the clamping component 103 are squeezed by the spiral rack 104d of the adjusting component 104. At this time, the adjusting component 104 will apply a rotational forward force to the clamping component 103 as a whole through the spiral shape of the spiral rack 104d. However, the two sides of the clamping component 103 are limited by the arc plate 101b, so the clamping component 103 can only slide along the limiting slide groove 101c. According to the rotation direction of the adjusting component 104, the clamping component 103 will gradually move towards the flame tube sleeved on the sleeve 101a to clamp or move away from it to release. The eight sets of clamping components 103 move synchronously, which can realize the strong clamping and fixing of the flame tube. At the same time, the distance of movement of the clamping component 103 can be controlled according to the number of rotations of the adjusting component 104, thereby achieving the purpose of adjusting the clamping range according to the size of the flame tube and meeting more usage needs.

[0049] The drive component 105 includes two sets of fixed ears 105a fixedly connected to the lower part of an arc plate 101b, a rotating shaft 105b horizontally arranged between the two sets of fixed ears 105a, a helical rack 105c spirally wrapped around the rotating shaft 105b and the outer diameter of the helical rack 105c extends to the teeth 104e, and a knob 105d fixedly arranged at one end of the rotating shaft 105b.

[0050] During use, the helical structure of the helical rack 105c meshes with the teeth 104e. When the rotating shaft 105b rotates, it drives the helical rack 105c to rotate. The rotating helical rack 105c squeezes and actuates the teeth 104e, thereby causing the adjusting component 104 to be actuated and rotate around the central disk 102a. The rotating adjusting component 104 pushes the clamping component 103 to perform clamping or releasing actions. When the driving component 105 does not rotate, the helical shape of the helical rack 105c limits the teeth 104e. At this time, the teeth 104e are limited and cannot rotate. Therefore, the rotation of the adjusting component 104 cannot drive the helical rack 105c to rotate. Thus, the helical rack 105c can be unidirectionally limited and fixed, thereby locking the working state of the clamping component 103.

[0051] The remaining structure is the same as that in Example 2.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fixture for spraying the flame tube of a gas turbine combustion chamber, characterized in that: include, The clamping unit (100) includes an abutting member (101) that abuts against the port of the flame tube, a grid member (102) disposed at the center of the abutting member (101) and the lower end of the grid member (102) extending below the abutting member (101), eight sets of clamping members (103) disposed on the abutting member (101) and arranged in a ring around the grid member (102), an adjusting member (104) disposed below the abutting member (101) and sleeved below the grid member (102) at its center, and a driving member (105) disposed on one side below the abutting member (101). The abutting component (101) includes a sleeve (101a) located above the grid component (102), eight sets of arc-shaped plates (101b) distributed in a ring below the sleeve (101a), a limiting groove (101c) located between each two adjacent sets of abutting components (101), and a limiting piece (101d) disposed in the limiting groove (101c). The sleeve (101a) is a hollow cylindrical structure, and the grid component (102) is disposed inside the cylindrical structure of the sleeve (101a). The two ends of the limiting piece (101d) located in the limiting groove (101c) are fixedly connected to the arc plate (101b) on both sides respectively. The grille component (102) includes a central disk (102a) located at the center of the sleeve (101a), with the central disk (102a) extending downward, eight sets of reinforcing ribs (102b) distributed in a ring around the outside of the central disk (102a), a limiting disk (102c) disposed below the central disk (102a), and an airflow channel (102d) that passes through the center of the central disk (102a). The end of the reinforcing rib (102b) is fixedly connected to the inner side of the arc plate (101b). There is a flow groove (102e) between each pair of adjacent reinforcing ribs (102b), and the flow groove (102e) is connected to the inside of the sleeve (101a). Gas can flow in the flow groove (102e) and the sleeve (101a). The clamping component (103) includes a slider (103a) located in the limiting groove (101c), a clamping plate (103b) disposed above the slider (103a), a limiting slot (103c) laterally opened on the slider (103a), meshing teeth (103d) evenly distributed below the slider (103a), a sliding slot (103e) located between every two adjacent sets of meshing teeth (103d), and a friction groove (103f) opened on the inner wall of the clamping plate (103b). The limiting piece (101d) is slidably connected in the limiting slot (103c), and the slider (103a) is limited in the vertical direction by the limiting piece (101d). The two sides of the slider (103a) are limited by the arc plate (101b), and it can only slide within the limiting groove (101c). The adjusting component (104) includes a collar (104a) sleeved on the central disk (102a), an adjusting disk (104b) located outside the collar (104a), eight sets of fixing rods (104c) arranged in a ring between the collar (104a) and the adjusting disk (104b) with the collar (104a) as the center, a spiral rack (104d) set on the adjusting disk (104b), and multiple sets of teeth (104e) evenly distributed on the outer wall of the adjusting disk (104b). The spiral rack (104d) has a spiral structure with two spiral turns. The upper end of the spiral rack (104d) is located in the sliding groove (103e), and the two sides of the spiral rack (104d) abut against the meshing teeth (103d). There is a flow groove (104f) between each two adjacent sets of fixed rods (104c), and the flow groove (104f) is connected to the flow channel (102e). The drive component (105) includes two sets of fixed ears (105a) fixedly connected to the underside of one of the arc-shaped plates (101b), a rotating shaft (105b) laterally arranged between the two sets of fixed ears (105a), a helical rack (105c) spirally wrapped around the rotating shaft (105b) and the outer diameter of the helical rack (105c) extending to the teeth (104e), and a knob (105d) fixedly arranged at one end of the rotating shaft (105b).

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