Assembly tool for overall delivery module general assembly of steam turbine and use method of assembly tool

Abstract

The invention discloses a steam turbine overall delivery module general assembly tool and a using method thereof, and belongs to the technical field of steam turbine assembly. The technical problems that an existing steam turbine assembling and transporting mode is large in workload and low in efficiency are solved. The device comprises an upper half positioning plate, a lower half positioning plate, a tightening screw and a measuring block assembly. The upper half positioning plate and the lower half positioning plate are both semicircular, threaded holes are formed in the end face of the upper half positioning plate, the end face of the lower half positioning plate and the end face of the cylinder, the upper half positioning plate is installed on the upper portion of the end face of the cylinder through matching of fastening screws and the threaded holes, and the lower half positioning plate is installed on the lower portion of the end face of the cylinder through matching of fastening screws and the threaded holes. The outer arc-shaped wall of the lower half positioning plate is provided with a measuring groove, the measuring groove is a through groove, the measuring block assembly is installed in the measuring groove, the upper surface of the inner arc-shaped wall of the lower half positioning plate is provided with a brass coating, and an external rotor is installed on the brass coating. And the assembly and transportation efficiency is improved. The method is used for overall delivery of turbines.

Description

Technical Field

[0001] The invention relates to an assembly tool for an integral delivery module of a steam turbine and a use method thereof, belonging to the technical field of steam turbine assembly. Background Art

[0002] Currently, the steam turbine unit manufacturing field generally adopts the pre-assembly process in the steam turbine factory to improve the accuracy of on-site installation and reduce quality risks.

[0003] The existing process has the following technical pain points: the bearing box and the outer cylinder need to be assembled in an integrated manner during the final assembly of the steam turbine in the factory, which requires the bearing box to be assembled in the factory as a rotor support; however, the foundation of the bearing box must be installed first during the power plant construction phase, forcing the bearing box assembly to be shipped separately in advance, resulting in a conflict in the supply sequence between the final assembly in the steam turbine factory and the on-site installation. This structural contradiction leads to two major technical defects: first, the assembly of the steam turbine in the factory requires the installation of the rotor, flow and "external reverse value" measurement, and the data accuracy must be guaranteed and transmitted to the site to restore the relative position of the rotor and the cylinder, resulting in a certain amount of repeated work; second, the supply cycle of the key path equipment is difficult to coordinate, which directly affects the overall construction progress of the power plant.

[0004] In summary, the existing steam turbine assembly and transportation methods have technical problems such as heavy workload and low efficiency. Summary of the invention

[0005] The present invention aims to solve the technical problems of heavy workload and low efficiency in existing steam turbine assembly and transportation methods, and further provides a steam turbine integral delivery module final assembly tool and a use method.

[0006] The technical solution of the present invention is a steam turbine integral delivery module assembly tool, which includes an upper positioning plate, a lower positioning plate, a tightening screw, and a measuring block assembly;

[0007] The external cylinder sleeve is mounted on the outside of the external rotor, the upper positioning plate and the lower positioning plate are both semicircular, and threaded holes are arranged on the end faces of the upper positioning plate, the lower positioning plate and the cylinder. The upper positioning plate is mounted on the upper end face of the cylinder by means of tightening screws and threaded holes, and the lower positioning plate is mounted on the lower end face of the cylinder by means of tightening screws and threaded holes. A measuring groove is provided on the outer arc wall of the lower positioning plate, and the measuring groove is a through groove. The measuring block assembly is mounted in the measuring groove. A brass coating is provided on the upper surface of the inner arc wall of the lower positioning plate, and the external rotor is mounted on the brass coating.

[0008] As another improvement of the present invention, the brass coating is welded to the upper surface of the inner arc-shaped wall of the lower half positioning plate by using a surfacing process.

[0009] As another improvement of the present invention, the back sides of the upper positioning plate and the lower positioning plate are both provided with stoppers, and the cylinder limits the upper positioning plate and the lower positioning plate through the stoppers.

[0010] As another improvement of the present invention, an adjusting gasket is installed at the stopper.

[0011] As another improvement of the present invention, a plurality of measuring windows are evenly provided on the inner arc-shaped wall of the lower half positioning plate.

[0012] As another improvement of the present invention, the number of the measurement windows is 3 to 5.

[0013] As another improvement of the present invention, it also includes a rotor axial fixing screw. A threaded through hole is provided on the side of the lower positioning plate. The axial positioning of the rotor is achieved by the cooperation between the rotor axial fixing screw and the threaded through hole.

[0014] As another improvement of the present invention, the measuring block assembly includes a measuring block, a mounting screw and a positioning pin. The cross section of the measuring block is an inverted L-shape. The measuring block is connected to the cylinder via the mounting screw, and the measuring block is axially positioned via the positioning pin.

[0015] The present invention also provides a method of use, comprising the following steps:

[0016] S1. Assemble the turbine in the factory. Place the cylinder on the assembly platform, install the lower half positioning plate and adjust the center of the lower half positioning plate.

[0017] S2. Assemble and adjust the relative position and size of various components of the steam turbine;

[0018] S3. Fix the steam turbine as a whole and the upper positioning plate, and then ship the steam turbine as a whole to the power plant site.

[0019] As another improvement of the present invention, S2 comprises the following steps:

[0020] S21. Put the rotor in place on the lower positioning plate, and measure and adjust the flow clearance between the rotor and other parts of the steam turbine;

[0021] S22, rotate the rotor and push and pull the rotor axially to ensure that there is no collision or wear between the rotor and other parts of the steam turbine;

[0022] S23. Use the measuring window and measuring block assembly on the tooling to measure the axial and radial relative position data of the rotor and the cylinder.

[0023] Beneficial effects of the present invention:

[0024] Through innovative tooling design and usage methods, the supply process is optimized to ensure a more reasonable delivery sequence of each component and improve the overall project advancement efficiency. The steam turbine factory assembly data is fully and accurately transmitted to the site, reducing the workload of secondary adjustments on site, improving the accuracy and efficiency of on-site installation, and reducing installation costs and time losses. Coordinate the supply cycle of key path equipment to avoid affecting the overall construction progress of the power plant due to uncoordinated supply cycles, ensure that the power plant construction project can proceed smoothly as planned, shorten the construction cycle, and improve economic benefits. On the premise of ensuring assembly quality, shorten the in-plant assembly cycle, improve production efficiency, and enhance the company's market competitiveness in the field of steam turbine manufacturing.

[0025] Compared with the prior art, the present invention shortens the in-factory assembly cycle by 20%. By using the positioning plate tooling to replace the rotor bearing function of the traditional bearing box, the assembly process is simplified, and the complex operations and waiting time caused by the integrated assembly of the bearing box and the outer cylinder are reduced. At the same time, the use method of the present invention improves the measurement efficiency, avoids repeated assembly adjustments caused by inaccurate measurement, further shortens the assembly cycle, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an assembly tool for an integral delivery module of a steam turbine according to the present invention.

[0027] Figure 2 yes Figure 1 Schematic diagram of the cross section at AA in the middle.

[0028] Figure 3 yes Figure 1 Schematic diagram of the cross section at BB in the middle. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0030] In the present application, "external reflection value" refers to the relative position parameters between various components of the steam turbine during the assembly process.

[0031] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. The present embodiment is a steam turbine integral delivery module assembly tool, which comprises an upper half positioning plate 1, a lower half positioning plate 2, a tightening screw 3 and a measuring block assembly;

[0032] The external cylinder set is outside the external rotor. The upper half positioning plate 1 and the lower half positioning plate 2 are both semi-circular rings. Threaded holes are provided on the end faces of the upper half positioning plate 1, the lower half positioning plate 2, and the cylinder. The upper half positioning plate 1 is installed on the upper part of the end face of the cylinder by mating the tightening screw 3 with the threaded hole, and the lower half positioning plate 2 is installed on the lower part of the end face of the cylinder by mating the tightening screw 3 with the threaded hole. A measuring groove 10 is formed on the outer arc wall of the lower half positioning plate 2. The measuring groove 10 is a through groove, and the measuring block assembly is installed in the measuring groove 10. A brass coating 7 is provided on the upper surface of the inner arc wall of the lower half positioning plate 2, and the external rotor is installed on the brass coating 7.

[0033] The upper surface of the inner arc wall of the lower half positioning plate is provided with a brass coating for constructing a part of the virtual bearing support position during the assembly process of the steam turbine. On the one hand, the brass material is relatively soft, which can effectively avoid damaging the rotor during the in-plant assembly process. On the other hand, its good wear resistance and self-lubrication can ensure smooth turning of the rotor when it is rotated by barring at the support position. By constructing a virtual bearing support position in the outer cylinder of the steam turbine, the positioning plate tooling completely replaces the bearing box in the traditional process to bear the rotor during in-plant assembly, realizes the decoupling of the in-plant assembly link and the on-site installation link, and solves the contradiction between the delivery sequence of the bearing box assembly and the in-plant general assembly in the traditional process.

[0034] Specific Embodiment 2: Combining Figures 1 to 3 To illustrate this embodiment, the difference between this embodiment and Specific Embodiment 1 is that the brass coating 7 is welded on the upper surface of the inner arc wall of the lower half positioning plate 2 by surfacing welding. The function of such a design is that the surfacing welding process is stable and reliable, the process is simple, and the reliability is high. Other components and connection methods are the same as those in Specific Embodiment 1.

[0035] Specific Embodiment 3: Combining Figures 1 to 3 To illustrate this embodiment, the difference between this embodiment and Specific Embodiment 1 is that a stop groove 11 is provided on the back sides of the upper half positioning plate 1 and the lower half positioning plate 2, and the cylinder limits the upper half positioning plate 1 and the lower half positioning plate 2 through the stop groove 11. Other components and connection methods are the same as those in Specific Embodiment 1 or 2.

[0036] Specific Embodiment 4: Combining Figures 1 to 3 To illustrate this embodiment, the difference between this embodiment and Specific Embodiment 1 is that an adjusting gasket 9 is installed at the stop groove 11. The function of such a design is that the adjusting gasket is used to accurately position the upper half positioning plate 1 and the lower half positioning plate 2. Other components and connection methods are the same as any one of Specific Embodiments 1 to 3.

[0037] Specific Embodiment 5: Combining Figures 1 to 3Regarding this embodiment, the difference between this embodiment and the first specific embodiment is that a number of measurement windows 12 are evenly provided on the inner arc-shaped wall of the lower positioning plate 2, which are used to measure the position dimensions of the rotor during and after the assembly process. The other components and connection methods are the same as any one of the first to fourth specific embodiments.

[0038] Specific embodiment six: Figures 1 to 3 Regarding this embodiment, the difference between this embodiment and the first specific embodiment is that the number of measurement windows 12 is 3 to 5. Such a design is to facilitate multi-position measurement of the rotor. The other components and connection methods are the same as any one of the first to fifth specific embodiments.

[0039] Specific embodiment seven: Figures 1 to 3 Regarding this embodiment, the difference between this embodiment and the first specific embodiment is that this embodiment further includes a rotor axial fixing screw 13. A threaded through hole is provided on the side surface of the lower positioning plate 2, and the axial limit of the external rotor is achieved by the cooperation of the rotor axial fixing screw 13 and the threaded through hole. The other components and connection methods are the same as any one of the first to sixth specific embodiments.

[0040] Specific embodiment eight: Figures 1 to 3 Regarding this embodiment, the difference between this embodiment and the first specific embodiment is that the measuring block assembly includes a measuring block 4, a mounting screw 5 and a positioning pin 6. The cross-section of the measuring block 4 is an inverted L shape. The measuring block 4 is connected to the cylinder by the mounting screw 5, and the axial positioning of the measuring block 4 is achieved by the positioning pin 6. The other components and connection methods are the same as any one of the first to seventh specific embodiments.

[0041] Specific embodiment nine: Figures 1 to 3 Regarding this embodiment, this embodiment provides a usage method for an overall shipping module general assembly and assembly tooling of a steam turbine based on any one of the first to eighth specific embodiments, including the following steps:

[0042] S1. Assembly within the steam turbine factory: Place the cylinder on the assembly platform, install the lower positioning plate 2 and adjust the center of the lower positioning plate 2;

[0043] S2. General assembly and adjustment of the relative position dimensions between the various components of the steam turbine;

[0044] S3. Fix the overall steam turbine and the upper positioning plate 1, and ship the overall steam turbine to the power plant site.

[0045] Compared with the prior art, the assembly cycle in the factory is shortened by 20% in this embodiment. By using the positioning plate tooling to replace the rotor bearing function of the traditional bearing box, the assembly process is simplified, and the complex operations and waiting time caused by the integrated assembly of the bearing box and the outer cylinder are reduced. At the same time, the new "outer reverse value" measurement scheme improves the measurement efficiency, avoids repeated assembly adjustments caused by inaccurate measurement, further shortens the assembly cycle, and improves the production efficiency. The innovative tooling combines the functions of transportation and fixation, changes the situation that the bearing box components need to be shipped separately in advance in the traditional process, realizes the coordination of the in-factory general assembly and the on-site installation supply timing, and eliminates the risk of supply conflicts of key path equipment. Ensure that each equipment in the power plant infrastructure stage can be supplied in a reasonable order in time, ensure that the overall construction progress of the power plant is not affected, and improve the stability and controllability of the project construction.

[0046] The new "outer reverse value" measurement method ensures the accuracy of the in-factory assembly data, enabling the complete and accurate transfer of the steam turbine factory assembly data to the site. The on-site installation personnel can carry out the installation based on these accurate data, reducing the on-site secondary adjustment workload, improving the accuracy of on-site installation, reducing the installation cost and quality risk, and enhancing the overall installation quality of the steam turbine. The shortening of the assembly cycle and the reduction of the on-site secondary adjustment workload reduce the labor and material costs. At the same time, it avoids project delays caused by supply conflicts, reduces the additional costs caused by delays, and improves the economic benefits of the enterprise.

[0047] Combined with Figures 1 to 3 To illustrate this embodiment, the difference between this embodiment and the ninth specific embodiment is that step S2 includes the following sub-steps:

[0048] S21. The rotor is placed on the lower half positioning plate, and the through-flow clearance between the rotor and other components of the steam turbine is measured and adjusted.

[0049] S22. Rotate the rotor and push and pull the rotor axially to ensure that there is no rubbing between the rotor and other components of the steam turbine.

[0050] S23. Use the measurement window 12 and the measurement block assembly to measure the axial and radial relative position data between the rotor and the cylinder.

[0051] The new "outer reverse value" measurement scheme ensures the accuracy of the in-factory assembly data, enabling the complete and accurate transfer of the factory assembly data to the site. The on-site installation personnel can carry out the installation based on these accurate data, reducing the on-site secondary adjustment workload, improving the accuracy of on-site installation, reducing the installation cost and quality risk, and enhancing the overall installation quality of the steam turbine.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A steam turbine integral delivery module final assembly tool, characterized in that It comprises an upper positioning plate (1), a lower positioning plate (2), a tightening screw (3) and a measuring block assembly; The external cylinder is sleeved on the outside of the external rotor. The upper positioning plate (1) and the lower positioning plate (2) are both semicircular. The upper positioning plate (1), the lower positioning plate (2) and the end faces of the cylinder are all provided with threaded holes. The upper positioning plate (1) is installed on the upper end face of the cylinder by means of a tightening screw (3) in cooperation with the threaded hole. The lower positioning plate (2) is installed on the lower end face of the cylinder by means of a tightening screw (3) in cooperation with the threaded hole. The outer arc-shaped wall of the lower positioning plate (2) is provided with a measuring groove (10). The measuring groove (10) is a through groove. The measuring block assembly is installed in the measuring groove (10). The upper surface of the inner arc-shaped wall of the lower positioning plate (2) is provided with a brass coating (7). The external rotor is installed on the brass coating (7).

2. The assembly tool for the steam turbine integral delivery module according to claim 1, characterized in that: The brass coating (7) is welded to the upper surface of the inner arc-shaped wall of the lower half positioning plate (2) by using a surfacing welding process.

3. The assembly tool for the steam turbine integral delivery module according to claim 1, characterized in that: The back sides of the upper positioning plate (1) and the lower positioning plate (2) are both provided with stoppers (11), and the cylinder limits the upper positioning plate (1) and the lower positioning plate (2) through the stoppers (11).

4. The steam turbine integral delivery module final assembly tool according to claim 3, characterized in that: An adjusting gasket (9) is installed at the stopper (11).

5. The steam turbine integral delivery module final assembly tool according to claim 1, characterized in that: A plurality of measuring windows (12) are evenly arranged on the inner arc-shaped wall of the lower half positioning plate (2).

6. The steam turbine integral delivery module final assembly tool according to claim 5, characterized in that: The number of the measurement windows (12) is 3 to 5.

7. The steam turbine integral delivery module final assembly tool according to claim 1, characterized in that It also includes a rotor axial fixing screw (13). A threaded through hole is provided on the side of the lower half positioning plate (2). The axial position of the external rotor is limited by the cooperation between the rotor axial fixing screw (13) and the threaded through hole.

8. The steam turbine integral delivery module final assembly tool according to claim 1, characterized in that: The measuring block assembly comprises a measuring block (4), a mounting screw (5) and a positioning pin (6); the cross section of the measuring block (4) is an inverted L-shape; the measuring block (4) is connected to the cylinder via the mounting screw (5); and the measuring block (4) is axially positioned via the positioning pin (6).

9. A method of use, characterized in that The method of use is based on the steam turbine integral delivery module assembly tooling according to claim 1, and comprises the following steps: S1. Assembling the turbine in the factory: placing the cylinder on the assembly platform, installing the lower half positioning plate (2) and adjusting the center of the lower half positioning plate (2); S2. Assemble and adjust the relative position and size of various components of the steam turbine; S3. Fix the steam turbine as a whole and the upper positioning plate (1), and then ship the steam turbine as a whole to the power plant site.

10. A method of use according to claim 9, characterized in that: Step S2 includes the following steps: S21. Put the rotor in place on the lower positioning plate, and measure and adjust the flow clearance between the rotor and other parts of the steam turbine; S22, rotate the rotor and push and pull the rotor axially to ensure that there is no collision or wear between the rotor and other parts of the steam turbine; S23, using the measuring window (12) and the measuring block assembly to measure the axial and radial relative position data of the rotor and the cylinder.

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