Welding tool for rotary displacement of exhaust cylinder of gas turbine

Abstract

The utility model belongs to the field of gas turbine exhaust cylinder machining equipment, and particularly provides a welding tool for rotary displacement of a gas turbine exhaust cylinder, which comprises two groups of displacement rollers, an assembling and welding platform is connected between the two groups of displacement rollers, and the gas turbine exhaust cylinder is positioned and welded on the assembling and welding platform when being assembled. The lower side of the displacement roller is placed on a roller of the welding roller frame, and the welding roller frame is used for driving the displacement roller to rotate. According to the tool and the method, the tangential supporting column can be vertically assembled and welded under the action of gravity, and the welding quality of the tangential supporting column and the size gap between the tangential supporting column and an outer cylinder opening are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of gas turbine exhaust cylinder processing equipment, and particularly relates to a welding tooling for the rotary displacement of a gas turbine exhaust cylinder. Background Art

[0002] The F-type gas turbine exhaust cylinder designed by a certain company mainly consists of components such as a bearing seat, an inner diffuser, an outer diffuser, an outer cylinder, tangential struts, and a tangential strut protective cover. The outer cylinders, outer diffusers, and inner diffusers of the upper and lower half exhaust cylinders are respectively provided with holes, and 3 tangential struts are used to connect the bearing seat and the outer cylinder in series. The design requirement is that each tangential strut is in a free state under the action of gravity during assembly and welding, as Figure 1 shown.

[0003] The structural feature of this type of exhaust cylinder is that it can only be manufactured separately for the upper and lower halves. First, the bearing seat, inner diffuser, tangential strut protective cover, outer diffuser, and outer cylinder are assembled, and finally, 3 tangential struts made of martensitic blade steel are welded. The weld seam requires 100% PT to be qualified, and the welding operation space is narrow. This is very different from the previous exhaust cylinders and can be said to completely subvert the manufacturing method of the company's gas turbine exhaust cylinders for more than twenty years. The existing processing equipment cannot meet this requirement at all. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a welding tooling for the rotary displacement of a gas turbine exhaust cylinder, which realizes the vertical assembly and welding of the tangential struts under the action of gravity, and ensures the welding quality of the tangential struts and the dimensional clearance with the outer cylinder openings.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a welding tooling for the rotary displacement of a gas turbine exhaust cylinder, which includes two groups of displacement rollers. A welding platform is connected between the two groups of displacement rollers. When the gas turbine exhaust cylinder is assembled, it is positioned and welded on the welding platform. The lower sides of the displacement rollers are placed on the rollers of a welding roller rack, and the welding roller rack is used to drive the rotation of the displacement rollers.

[0006] In a preferred solution, the welding platform includes a panel. A plurality of reinforcing ribs are provided at the bottom of the panel, and a plurality of support foot plates are provided below the panel. The support foot plates are arranged on the side of the reinforcing ribs away from the panel.

[0007] In a preferred solution, the reinforcing ribs include a plurality of longitudinal ribs that are consistent with the width direction of the panel, and a plurality of transverse ribs are provided between the longitudinal ribs.

[0008] In a preferred solution, a plurality of weight reduction holes are provided on the reinforcing ribs.

[0009] In a preferred embodiment, lifting holes are provided at the ends of two groups of the longitudinal bars, and the four lifting holes are symmetric about the two center lines of the panel both horizontally and vertically.

[0010] In a preferred embodiment, a number of rib plates are provided between the position-changing roller and the welding and assembling platform.

[0011] A welding fixture for the rotary position change of a gas turbine exhaust cylinder provided by the present utility model has the following beneficial effects:

[0012] 1. The welding roller frame is energized and operated to drive the position-changing roller, the welding and assembling platform, and the gas turbine exhaust cylinder to rotate synchronously. When the welding angle of one of the tangential struts rotates to the vertical state, the hoisting, assembly, and welding of this group of tangential struts are carried out, so as to realize the vertical welding of the tangential struts under the action of gravity.

[0013] 2. It meets the welding requirements at various angles of the exhaust cylinder. By using this device and method, the problem of the rotary position change of this type of single-half manufactured exhaust cylinder is solved with a relatively low cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the installation position of the tangential strut;

[0016] Figure 2 It is a schematic diagram of the assembly and installation structure of the gas turbine exhaust cylinder;

[0017] Figure 3 It is the front view of the present utility model;

[0018] Figure 4 It is the top view of the present utility model;

[0019] Figure 5 For Figure 4 The sectional view along the A-A plane;

[0020] Figure 6 It is the front view of the welding and assembling platform;

[0021] Figure 7 It is the bottom view of the welding and assembling platform;

[0022] Figure 8 It is the side view of the welding and assembling platform;

[0023] Figure 9 It is the schematic diagram of the structure of the position-changing roller;

[0024] Figure 10 It is the installation schematic diagram of the equal-height pad during the welding and assembling process of the position-changing roller;

[0025] Figure 11Schematic diagram of the welding process of the tangential strut

[0026] In the figure: position-changing roller 1, welding and assembly platform 2, panel 210, stiffening rib 220, longitudinal rib 221, transverse rib 222, weight-reducing hole 223, lifting hole 224, support foot bottom plate 230, welding roller frame 3, rib plate 4, gas turbine exhaust cylinder 5, bearing seat 501, inner diffuser 502, tangential strut protective cover 503, outer diffuser 504, outer cylinder 505, tangential strut 506, equal-height pad 6, rotation center 7 Specific implementation method

[0027] As Figures 2 - 9 shown, a rotating position-changing tooling for a gas turbine exhaust cylinder includes two groups of position-changing rollers 1, as Figure 9 shown. A welding and assembly platform 2 is connected between the two groups of position-changing rollers 1. Specifically, the position-changing roller 1 is welded to the welding platform 2. When assembling the gas turbine exhaust cylinder 5, it is positioned and spot-welded (welded) on the welding and assembly platform 2. The lower side of the position-changing roller 1 is placed on the rollers of the welding roller frame 3, and the welding roller frame 3 is used to drive the rotation of the position-changing roller 1. The welding roller frame 3 is a self-adjusting welding roller frame

[0028] After the welding roller frame 3 is powered on and starts for a test run, and after confirming that there is no error, the welding roller frame 3 continues to drive, and the position-changing roller 1, the welding and assembly platform 2, and the gas turbine exhaust cylinder 5 rotate synchronously. When rotating to the welding angle of one of the tangential struts 506 being in a vertical state, as Figure 1 shown, the welding roller frame 3 stops driving, and the hoisting, assembly, and welding of this group of tangential struts 506 are carried out. Then the welding roller frame 3 continues to drive, repeating the above operations, and successively completing the welding of the remaining two tangential struts 506, realizing the position-changing welding of the gas turbine exhaust cylinder, and realizing the vertical welding of the tangential struts under the action of gravity

[0029] Preferably, as Figures 6 - 8 shown, the welding and assembly platform 2 includes a panel 210. A number of stiffening ribs 220 are provided at the bottom of the panel 210, and a number of support foot bottom plates 230 are provided below the panel 210. The support foot bottom plates 230 are arranged on the side of the stiffening ribs 220 away from the panel 210. The support foot bottom plates 230 are used for cooperative placement with the equal-height pads 6

[0030] The length and width dimensions of the welding and assembly platform 2 are determined according to the projection size of the exhaust cylinder and the size of the manual walking passage during welding. When designing the platform height dimension, the height is appropriately reduced on the premise of ensuring the bending strength of the platform according to the weight of the exhaust cylinder, and the thickness of the panel 210 is 80 - 85 mm. When designing, it is considered that the flatness of the platform becomes poor after multiple uses and needs to be machined before being put into use

[0031] The reinforcing rib 220 includes a number of longitudinal ribs 221 that are consistent with the width direction of the panel 210, and a number of transverse ribs 222 are provided between the longitudinal ribs 221. The reinforcing rib 220 is designed with weight-reducing holes 223 for reducing weight, and lifting holes 224 are opened at the ends of two of the reinforcing ribs for hoisting. The four groups of lifting holes 224 are symmetrically arranged left and right and front and back along the two centerlines of the panel 210.

[0032] After the welding and assembly platform 2 is welded, annealing heat treatment is carried out. After the foot plate 230 and the panel ensure a flatness of 0.3 mm for the panel, it is put into use.

[0033] The diameters, widths and other dimensions of the two turning rollers 1 are determined by comprehensively considering the length of the welding and assembly platform 2, the height of the welding roller frame 3, and whether the body of the welding roller frame 3 interferes during rotation. Specifically, as Figure 5 shown, a number of rib plates 4 are provided between the turning roller 1 and the welding and assembly platform 2.

[0034] The operation process of this device is as follows: After the gas turbine exhaust cylinder 5 and the welding and assembly platform 2 are respectively three-dimensionally modeled, they are simulated and assembled, and the centroid of the entire assembled component is calculated as the rotation center 7. After the welding and assembly platform 2 is prepared, according to the projection position of the rotation center 7 on the panel 210, the ground line for assembling the exhaust cylinder is drawn, and the bearing seat 501, the inner diffuser 502, the tangential strut protection cover 503, the outer diffuser 504 and the outer cylinder 505 of the gas turbine exhaust cylinder 5 are assembled in sequence. After assembly, each component is welded and reinforced with the welding and assembly platform 2. The entire component composed of the gas turbine exhaust cylinder 5 and the welding and assembly platform 2 is horizontally lifted and leveled with the prepared equal-height pads 6, as Figure 10 shown. Lift the two turning rollers 1, and after the center of the turning roller 1 is concentric and perpendicular to the rotation center 7 of the component composed of the gas turbine exhaust cylinder 5 and the welding and assembly platform 2, it is tack-welded and connected to the welding and assembly platform 2. After checking the surrounding environment and confirming safety, the overall component composed of the turning roller 1, the welding and assembly platform 2 and the gas turbine exhaust cylinder 5 is hoisted and placed on the welding roller frame 3. The welding roller frame 3 is powered on and started for a test run. After confirming that there is no error, the welding roller frame 3 continues to drive, and the turning roller 1, the welding and assembly platform 2 and the gas turbine exhaust cylinder 5 rotate synchronously, as Figure 11 shown. When it rotates to the welding angle of one of the tangential struts 506 being in the vertical state, the welding roller frame 3 stops driving, and the hoisting, assembly and welding of this group of tangential struts 506 are carried out. Then the welding roller frame 3 continues to drive, and the above operations are repeated to complete the welding of the remaining two tangential struts 506 in sequence. When all the tangential struts are welded and the weld flaw detection is qualified, the overall component composed of the turning roller 1, the welding and assembly platform 2 and the gas turbine exhaust cylinder 5 is horizontally lifted from the welding roller frame 3 and placed on the previous equal-height pads 6. The turning roller 1 is removed, and after the gas turbine exhaust cylinder 5 is removed, it enters the next processing procedure.

[0035] The utility model uses a rigid welding platform to serially support each relatively independent exhaust cylinder component, calculates the centroid of the structural member by using computer three-dimensional modeling, thus manufactures a position-changing roller, and drives the rotation of the component by the rotation of the welding roller frame to meet the welding requirements of each angle of the exhaust cylinder. By this method, the problem of the rotary position change of such single-half manufactured exhaust cylinders is solved with a relatively low cost investment.

Claims

1. A welding tooling for the rotary displacement of a gas turbine exhaust cylinder, characterized in that The invention comprises two groups of displacement rollers (1), wherein a welding platform (2) is connected between the two groups of displacement rollers (1); when the exhaust cylinder (5) of a gas turbine is assembled, it is positioned and welded on the welding platform (2); the lower side of the displacement rollers (1) is placed on the rollers of a welding roller frame (3); and the welding roller frame (3) is used to drive the displacement rollers (1) to rotate.

2. The welding tooling for the rotary displacement of the exhaust cylinder of a gas turbine according to claim 1, characterized in that, The welding platform (2) comprises a panel (210), a plurality of reinforcing ribs (220) are arranged at the bottom of the panel (210), a plurality of supporting foot bottom plates (230) are arranged below the panel (210), and the supporting foot bottom plates (230) are arranged on a side of the reinforcing ribs (220) away from the panel (210).

3. A welding tooling for the rotary displacement of a gas turbine exhaust cylinder according to claim 2, characterized in that, The reinforcing ribs (220) include a plurality of longitudinal ribs (221) that are consistent with the width direction of the panel (210), and a plurality of transverse ribs (222) are provided between the longitudinal ribs (221).

4. A welding tooling for the rotation displacement of a gas turbine exhaust cylinder according to claim 2, characterized in that, A plurality of weight-reducing holes (223) are provided on the reinforcing rib (220).

5. A welding tooling for the rotary displacement of a gas turbine exhaust cylinder according to claim 3, characterized in that, Two groups of the longitudinal ribs (221) are provided with hoisting holes (224) at their ends, and the four groups of hoisting holes (224) are symmetrical left-right and front-back along two center lines of the panel (210).

6. A welding tooling for the rotation displacement of a gas turbine exhaust cylinder according to claim 1, characterized in that, A plurality of rib plates (4) are arranged between the displacement roller (1) and the welding platform (2).

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