Rotary displacement tool and method for exhaust cylinder of gas turbine

Abstract

The invention belongs to the field of gas turbine exhaust cylinder machining equipment, and particularly provides a gas turbine exhaust cylinder rotating deflection tool and method.The gas turbine exhaust cylinder rotating deflection tool comprises two deflection rollers, an assembling and welding platform is connected between the two deflection rollers, and the gas turbine exhaust cylinder is positioned and welded to the assembling and welding platform during assembling; 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 invention relates to the field of gas turbine exhaust cylinder processing equipment, and in particular to a gas turbine exhaust cylinder rotation displacement tool and method. Background Art

[0002] The F-type gas turbine exhaust cylinder designed by a company is mainly composed of bearing seat, inner diffuser, outer diffuser, outer cylinder, tangential strut and tangential strut protection cover. The openings on the outer cylinder, outer diffuser and inner diffuser of the upper and lower cylinders are connected in series by three tangential struts. The design requires that each tangential strut be in a free state under the action of gravity during assembly and welding. Figure 1 shown.

[0003] The structural feature of this type of exhaust cylinder is that it can only be made in two halves: the bearing seat, inner diffuser, tangential strut protection cover, outer diffuser and outer cylinder are assembled first, and finally the three tangential struts made of martensitic blade steel are welded. The welds are required to be 100% PT qualified and the welding operation space is small. This is very different from the previous exhaust cylinders, and it can be said that it completely subverted the company's production method for gas turbine exhaust cylinders for more than 20 years. The existing processing equipment cannot meet this requirement at all. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gas turbine exhaust cylinder rotation displacement tool and method, so as to realize the vertical welding of the tangential strut under the action of gravity, and ensure the welding quality of the tangential strut and the size gap with the outer cylinder opening.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a gas turbine exhaust cylinder rotation displacement tooling, including two groups of displacement rollers, the two groups of displacement rollers are connected to the welding platform, the gas turbine exhaust cylinder is positioned and welded on the welding platform when assembled, the lower side of the displacement roller is placed on the roller of the welding roller frame, and the welding roller frame is used to rotate and drive the displacement roller.

[0006] In a preferred solution, the welding platform includes a panel, a plurality of reinforcing ribs are arranged at the bottom of the panel, a plurality of supporting foot bottom plates are arranged below the panel, and the supporting foot bottom 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 which are consistent with the width direction of the panel, and a plurality of transverse ribs are arranged between the longitudinal ribs.

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

[0009] In a preferred solution, two groups of the longitudinal ribs have ends provided with hanging holes, and the four groups of hanging holes are symmetrical left-right and front-back along two center lines of the panel.

[0010] In a preferred embodiment, the thickness of the panel is 80-85 mm.

[0011] In a preferred embodiment, the flatness of the upper side of the panel and the lower side of the support foot bottom plate is 0.3 mm.

[0012] In a preferred solution, a plurality of ribs are arranged between the displacement roller and the welding platform.

[0013] The present invention also provides a method for rotating and displacing an exhaust cylinder of a gas turbine, comprising the following steps: Step 1: After the gas turbine exhaust cylinder and the welding platform are three-dimensionally modeled, the assembly is simulated and the center of mass of the entire component after assembly is calculated as the rotation center; Step 2: After the welding platform is prepared, the cylinder assembly ground sample line is drawn on the panel according to the projection position of the rotation center line, and the bearing seat, inner diffuser, tangential strut protection cover, outer diffuser and outer cylinder of the gas turbine exhaust cylinder are assembled in sequence. After assembly, each component is welded and reinforced with the welding platform; Step 3: hoist the entire component consisting of the gas turbine exhaust cylinder and the welding platform horizontally, and use the prepared equal height pads to level it, hoist two displacement rollers, find the center of the displacement roller concentric with the rotation center of the component consisting of the gas turbine exhaust cylinder and the welding platform, find verticality, and then perform positioning welding to connect it with the welding platform; Step 4: After checking the surrounding environment and confirming that it is safe, the integral component consisting of the displacement roller, the welding platform and the gas turbine exhaust cylinder is hoisted and placed on the welding roller frame. The welding roller frame is powered on and started for trial operation. After confirmation, the welding roller frame continues to drive, and the displacement roller, the welding platform and the gas turbine exhaust cylinder rotate synchronously. When the welding angle of one of the tangential pillars is rotated to a vertical state, the welding roller frame stops driving, and the group of tangential pillars is hoisted, assembled and welded. Then the welding roller frame continues to drive, and the above operations are repeated to complete the welding of the remaining two tangential pillars in turn. Step 5: When the tangential struts are all welded and the welds are inspected and qualified, the integral component consisting of the displacement roller, welding platform and gas turbine exhaust cylinder is hoisted down from the welding roller frame and placed on the previous equal height pad. The displacement roller and gas turbine exhaust cylinder are removed and then enter the next processing step.

[0014] The present invention provides a gas turbine exhaust cylinder rotation displacement tool and method, which has the following beneficial effects: 1. The welding roller frame is powered on to drive the displacement roller, welding platform and gas turbine exhaust cylinder to rotate synchronously. When the welding angle of one of the tangential pillars is vertical, the group of tangential pillars is hoisted, assembled and welded to achieve vertical welding of the tangential pillars under gravity.

[0015] 2. Satisfy the welding requirements of exhaust cylinders at all angles. This device and method solve the problem of rotation displacement of such single-half exhaust cylinders at a relatively low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 The figure is a schematic diagram of the installation position of the tangential support; Figure 2 The figure is a schematic diagram of the assembly and installation structure of the gas turbine exhaust cylinder; Figure 3 It is a front view of the present invention; Figure 4 A top view of the present invention; Figure 5 for Figure 4 Section view along plane AA; Figure 6 This is a front view of the welding platform; Figure 7 This is a bottom view of the welding platform; Figure 8 It is a side view of the welding platform; Fig. 9 It is a schematic diagram of the displacement roller structure; Fig.10 This is a schematic diagram of the installation of the equal height pad during the welding process of the displacement roller; Fig.11 Schematic diagram of the welding process of the tangential support; In the figure: displacement roller 1, welding platform 2, panel 210, reinforcing rib 220, longitudinal rib 221, transverse rib 222, weight reduction 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 protection cover 503, outer diffuser 504, outer cylinder 505, tangential strut 506, equal height pad 6, rotation center 7. DETAILED DESCRIPTION

[0017] like Figures 2~9 As shown, a gas turbine exhaust cylinder rotation displacement tooling includes two sets of displacement rollers 1, such as Fig. 9 As shown. The welding platform 2 is connected between the two groups of displacement rollers 1. Specifically, the displacement rollers 1 are welded to the welding platform 2. When the gas turbine exhaust cylinder 5 is assembled, it is positioned and welded on the welding platform 2. The lower side of the displacement roller 1 is placed on the roller of the welding roller frame 3. The welding roller frame 3 is used to drive the displacement roller 1 to rotate. The welding roller frame 3 uses a self-adjusting welding roller frame.

[0018] The welding roller frame 3 is powered on and started for trial operation. After confirmation, the welding roller frame 3 continues to drive, and the displacement roller 1, the welding platform 2 and the gas turbine exhaust cylinder 5 rotate synchronously. When the welding angle of one of the tangential pillars 506 is vertical, as shown in FIG. Figure 1 As shown, the welding roller frame 3 stops driving, and the group of tangential struts 506 are hoisted, assembled and welded. 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 turn, thereby realizing the displacement welding of the gas turbine exhaust cylinder and realizing the vertical welding of the tangential struts under the action of gravity.

[0019] Preferably, Figures 6-8 As shown, the welding platform 2 includes a panel 210, a plurality of reinforcing ribs 220 are arranged at the bottom of the panel 210, a plurality of foot bottom plates 230 are arranged below the panel 210, and the foot bottom plates 230 are arranged on the side of the reinforcing ribs 220 away from the panel 210. The foot bottom plates 230 are used for being placed in cooperation with the contour pads 6.

[0020] The length and width of the welding platform 2 are determined according to the projection size of the exhaust cylinder and the size of the manual walking channel during welding. The height of the platform is designed based on the weight of the exhaust cylinder to ensure the bending strength of the platform and the height is appropriately reduced. The thickness of the panel 210 is 80~85mm. During the design, it is considered that the flatness of the platform will deteriorate after repeated use and needs to be machined before it can be put into use.

[0021] The reinforcing ribs 220 include a plurality of longitudinal ribs 221 in the same width direction as the panel 210, and a plurality of transverse ribs 222 are arranged between the longitudinal ribs 221. The reinforcing ribs 220 are designed with weight-reducing holes 223 for reducing weight, and hoisting holes 224 are opened at the ends of two of the reinforcing ribs for lifting and hoisting, and the four groups of hoisting holes 224 are symmetrical left-right and front-back along the two center lines of the panel 210.

[0022] After welding, the welding platform 2 is subjected to annealing heat treatment, and the foot base plate 230 and the panel are put into use after ensuring the flatness of the panel is 0.3 mm.

[0023] The diameter, width and other dimensions of the two displacement rollers 1 are determined by comprehensively considering the length of the welding platform 2, the height of the welding roller frame 3 and whether the welding roller frame 3 interferes with each other during rotation. Figure 5 As shown, a plurality of ribs 4 are arranged between the displacement roller 1 and the welding platform 2 .

[0024] A method for rotating and displacing an exhaust cylinder of a gas turbine comprises the following steps: Step 1: After the gas turbine exhaust cylinder 5 and the welding platform 2 are three-dimensionally modeled, the assembly is simulated and the center of mass of the entire component after assembly is calculated as the rotation center 7.

[0025] Step 2: After the welding platform 2 is prepared, the cylinder assembly ground sample line is drawn on the panel 210 according to the projection position of the rotation center 7, and the bearing seat 501, inner diffuser 502, tangential strut protection cover 503, outer diffuser 504 and 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 platform 2.

[0026] Step 3: The entire structure consisting of the gas turbine exhaust cylinder 5 and the welding platform 2 is hoisted horizontally and leveled with the prepared equal height pads 6, such as Fig.10 Two displacement rollers 1 are hoisted, and the center of the displacement roller 1 is aligned with the rotation center 7 of the component composed of the gas turbine exhaust cylinder 5 and the welding platform 2, and then positioned and welded to connect with the welding platform 2.

[0027] Step 4: After checking the surrounding environment and confirming that it is safe, the integral component consisting of the displacement roller 1, the welding 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 trial operation. After confirmation, the welding roller frame 3 continues to drive, and the displacement roller 1, the welding platform 2 and the gas turbine exhaust cylinder 5 rotate synchronously. Fig.11 As shown, when the welding angle of one of the tangential pillars 506 is rotated to a vertical state, the welding roller frame 3 stops driving, and the group of tangential pillars 506 are hoisted, assembled and welded, and then the welding roller frame 3 continues to drive, repeating the above operations to complete the welding of the remaining two tangential pillars 506 in turn.

[0028] Step 5: When the tangential struts are all welded and the welds are inspected and qualified, the integral component consisting of the displacement roller 1, the welding platform 2 and the gas turbine exhaust cylinder 5 is horizontally suspended from the welding roller frame 3 and placed on the previous equal-height pad 6. The displacement roller 1 and the gas turbine exhaust cylinder 5 are removed and then enter the next processing step.

[0029] The present invention uses a rigid welding platform to support each relatively independent exhaust cylinder component in series, and uses computer three-dimensional modeling to calculate the center of mass of the structural component, so as to manufacture a displacement roller, and use the rotation of the welding roller frame to drive the rotation of the component to meet the welding requirements of various angles of the exhaust cylinder. This method solves the problem of rotation displacement of this type of single-half-manufactured exhaust cylinder at a relatively low cost.

[0030] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A gas turbine exhaust cylinder rotation displacement tool, 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. A gas turbine exhaust cylinder rotation displacement tooling 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 gas turbine exhaust cylinder rotation displacement tool as claimed in 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 gas turbine exhaust cylinder rotation displacement tool as claimed in claim 2, characterized in that: A plurality of weight-reducing holes (223) are provided on the reinforcing rib (220).

5. A gas turbine exhaust cylinder rotation displacement tool as claimed in 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 gas turbine exhaust cylinder rotation displacement tool as claimed in claim 2, characterized in that: The panel (210) has a thickness of 80-85 mm.

7. A gas turbine exhaust cylinder rotation displacement tool as claimed in claim 2, characterized in that: The flatness of the upper side of the panel (210) and the lower side of the foot base plate (230) is 0.3 mm.

8. A gas turbine exhaust cylinder rotation displacement tool as claimed in claim 1, characterized in that: A plurality of rib plates (4) are arranged between the displacement roller (1) and the welding platform (2).

9. A method for rotating and displacing an exhaust cylinder of a gas turbine, characterized in that: The gas turbine exhaust cylinder rotation displacement tooling according to any one of claims 1 to 8 is used for rotation displacement, comprising the following steps: Displacement roller (1), welding platform (2), panel (210), reinforcing 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), equal height pad (6) Step 1: After the gas turbine exhaust cylinder (5) and the welding platform (2) are three-dimensionally modeled, the assembly is simulated and the center of mass of the entire component after assembly is calculated as the rotation center (7); Step 2: After the welding platform (2) is prepared, a cylinder assembly ground sample line is drawn on the panel (210) according to the projection position of the rotation center (7), 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 platform (2); Step 3: The entire component consisting of the gas turbine exhaust cylinder (5) and the welding platform (2) is hoisted horizontally and leveled with a prepared equal height pad (6), and two displacement rollers (1) are hoisted. The center of the displacement roller (1) is aligned with the rotation center (7) of the component consisting of the gas turbine exhaust cylinder (5) and the welding platform (2), and then the center of the circle is aligned and vertically aligned with the rotation center (7) of the component consisting of the gas turbine exhaust cylinder (5) and the welding platform (2), and then the components are connected to the welding platform (2). Step 4: After checking the surrounding environment and confirming that it is safe, the integral component consisting of the displacement roller (1), the welding 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 and tested. After confirmation, the welding roller frame (3) continues to drive, and the displacement roller (1), the welding platform (2) and the gas turbine exhaust cylinder (5) rotate synchronously. When the welding angle of one of the tangential pillars (506) is rotated to a vertical state, the welding roller frame (3) stops driving, and the group of tangential pillars (506) is hoisted, assembled and welded. Then the welding roller frame (3) continues to drive, and the above operations are repeated to complete the welding of the remaining two tangential pillars (506) in sequence; Step 5: After the tangential struts are all welded and the welds are inspected and qualified, the integral component consisting of the displacement roller (1), the welding platform (2) and the gas turbine exhaust cylinder (5) is suspended horizontally from the welding roller frame (3) and placed on the previous equal height pad (6). The displacement roller (1) and the gas turbine exhaust cylinder (5) are removed and then enter the next processing step.

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