Assembly tool for overall delivery module general assembly of steam turbine

Abstract

The utility model 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] This utility model relates to a steam turbine overall delivery module assembly tooling and its usage method, belonging to the field of steam turbine assembly technology. Background Technology

[0002] Currently, the turbine manufacturing industry generally adopts pre-assembly processes in turbine factories to improve the accuracy of on-site installation and reduce quality risks.

[0003] The existing process suffers from the following technical challenges: During turbine assembly at the turbine plant, the bearing housing and outer cylinder must be integrated, requiring the bearing housing, as a rotor support, to participate in the turbine plant assembly. However, during the power plant infrastructure construction phase, the bearing housing foundation must be installed first, forcing the bearing housing components to be shipped separately in advance, causing a supply sequence conflict between turbine plant assembly and on-site installation. This structural contradiction leads to two major technical defects: First, turbine plant assembly requires rotor installation, flow path measurement, and "external reflection" measurement, necessitating accurate data transmission to the field for restoring the relative positions of the rotor and cylinder, resulting in repetitive work. Second, the supply cycle of critical path equipment is difficult to coordinate, directly impacting the overall power plant construction progress.

[0004] In summary, the existing methods for assembling and transporting steam turbines suffer from technical problems such as excessive workload and low efficiency. Utility Model Content

[0005] This utility model aims to solve the technical problems of excessive workload and low efficiency in existing steam turbine assembly and transportation methods, and provides a steam turbine overall delivery module assembly tooling and usage method.

[0006] The technical solution of this utility model is a steam turbine overall delivery module assembly tooling, which includes an upper positioning plate, a lower positioning plate, a tightening screw, and a measuring block assembly.

[0007] An externally mounted cylinder is installed on the outside of an externally mounted rotor. Both the upper and lower positioning plates are semi-circular rings. Threaded holes are provided on the end faces of the upper and lower positioning plates and the cylinder. The upper positioning plate is installed on the upper part of the cylinder end face by means of a tightening screw engaging with the threaded hole. The lower positioning plate is installed on the lower part of the cylinder end face by means of a tightening screw engaging with the threaded hole. A measuring groove is provided on the outer arc-shaped wall of the lower positioning plate. The measuring groove is a through groove. The measuring block assembly is installed in the measuring groove. A brass coating is provided on the upper surface of the inner arc-shaped wall of the lower positioning plate. The externally mounted rotor is installed on the brass coating.

[0008] As another improvement of this utility model, the brass coating is welded to the inner arc-shaped wall surface of the lower positioning plate using a welding process.

[0009] As another improvement of this utility model, both the upper and lower positioning plates are provided with stop edges on their back sides, and the cylinder limits the upper and lower positioning plates through the stop edges.

[0010] As another improvement of this utility model, an adjusting shim is installed at the stop.

[0011] As another improvement of this utility model, several measuring windows are evenly provided on the inner arc-shaped wall of the lower positioning plate.

[0012] As another improvement of this utility model, the number of measuring windows is 3 to 5.

[0013] As another improvement of this utility model, it also includes a rotor axial fixing screw, and a threaded through hole is provided on the side of the lower half positioning plate. The rotor axial fixing screw and the threaded through hole are used to achieve axial positioning of the rotor.

[0014] As another improvement of this utility model, the measuring block assembly includes a measuring block, mounting screws and positioning pins. The measuring block has an inverted L-shaped cross section. The measuring block is connected to the cylinder by mounting screws and is axially positioned by positioning pins.

[0015] The beneficial effects of this utility model are:

[0016] By innovating tooling design and usage methods, the supply process is optimized, ensuring a more rational delivery sequence for each component and improving overall project efficiency. Complete and accurate transmission of turbine factory assembly data to the site is achieved, reducing on-site adjustments, improving installation accuracy and efficiency, and lowering installation costs and time. The supply cycles of critical path equipment are coordinated to avoid disruptions to the overall power plant construction schedule due to supply cycle discrepancies, ensuring the project progresses smoothly according to plan, shortening the construction period, and improving economic benefits. While maintaining assembly quality, the in-plant assembly cycle is shortened, production efficiency is improved, and the company's market competitiveness in the turbine manufacturing field is enhanced.

[0017] Compared to existing technologies, this invention reduces the assembly cycle in the factory by 20%. By using a positioning plate tooling to replace the rotor bearing function of the traditional bearing housing, the assembly process is simplified, reducing the complex operations and waiting time caused by the integrated assembly of the bearing housing and outer cylinder. Simultaneously, the method of this invention improves measurement efficiency, avoiding repeated assembly adjustments due to inaccurate measurements, further shortening the assembly cycle and improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a steam turbine overall delivery module assembly tooling according to the present invention.

[0019] Figure 2yes Figure 1 A cross-sectional view at point AA.

[0020] Figure 3 yes Figure 1 A cross-sectional view of section BB. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0022] In this utility model application, "external reverse value" refers to the relative positional parameters between the various components of the steam turbine during the assembly process.

[0023] Specific implementation method one: Combining Figures 1 to 3 This embodiment describes a steam turbine overall delivery module assembly tooling, which includes an upper positioning plate 1, a lower positioning plate 2, a tightening screw 3, and a measuring block assembly.

[0024] An externally mounted cylinder is installed on the outside of an externally mounted rotor. Both the upper positioning plate 1 and the lower positioning plate 2 are semi-circular rings. Threaded holes are provided on the end faces of the upper positioning plate 1, the lower positioning plate 2, and the cylinder. The upper positioning plate 1 is installed on the upper part of the cylinder end face by means of a tightening screw 3 engaging with the threaded hole. The lower positioning plate 2 is installed on the lower part of the cylinder end face by means of a tightening screw 3 engaging with the threaded hole. A measuring groove 10 is provided on the outer arc-shaped wall of the lower positioning plate 2. The measuring groove 10 is a through groove. 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-shaped wall of the lower positioning plate 2. The externally mounted rotor is installed on the brass coating 7.

[0025] The inner arc-shaped wall surface of the lower positioning plate is coated with brass to construct the virtual bearing support position during turbine assembly. On one hand, brass is relatively soft, effectively preventing rotor damage during factory assembly; on the other hand, its excellent wear resistance and self-lubricating properties ensure smooth rotor rotation at the support position. By constructing a virtual bearing support position on the outer cylinder of the turbine, the positioning plate fixture completely replaces the traditional bearing housing's load-bearing function during factory assembly, decoupling the factory assembly process from the on-site installation process. This resolves the conflict between the bearing housing component delivery sequence and the factory final assembly in traditional processes.

[0026] Specific Implementation Method Two: Combining Figures 1 to 3This embodiment differs from Specific Embodiment 1 in that the brass coating 7 is welded to the inner arc-shaped wall surface of the lower positioning plate 2 using a welding process. This design ensures a stable and reliable welding process, simplicity, and high reliability. Other components and connection methods are the same as in Specific Embodiment 1.

[0027] Specific implementation method three: Combining Figures 1 to 3 This embodiment differs from specific embodiment one in that both the upper positioning plate 1 and the lower positioning plate 2 have a stop 11 on their back sides, through which the cylinder limits the movement of the upper positioning plate 1 and the lower positioning plate 2. Other components and connection methods are the same as in specific embodiment one or two.

[0028] Specific implementation method four: Combination Figures 1 to 3 This embodiment differs from specific embodiment one in that an adjusting shim 9 is installed at the stop 11. The purpose of this design is to allow the adjusting shim to precisely position the upper positioning plate 1 and the lower positioning plate 2. Other components and connection methods are the same as in any one of specific embodiments one to three.

[0029] Specific Implementation Method Five: Combining Figures 1 to 3 This embodiment differs from specific embodiment one in that it has a plurality of measuring windows 12 evenly distributed on the inner arc-shaped wall of the lower positioning plate 2. These windows are used to measure the position and dimensions of the rotor during and after assembly. Other components and connection methods are the same as any one of specific embodiments one to four.

[0030] Specific Implementation Method Six: Combination Figures 1 to 3 This embodiment differs from specific embodiment one in that it has 3 to 5 measuring windows 12. This design facilitates multi-position measurement of the rotor. Other components and connections are the same as in any one of specific embodiments one through five.

[0031] Specific implementation method seven: Combination Figures 1 to 3 This embodiment differs from specific embodiment one in that it also includes a rotor axial fixing screw 13, and a threaded through hole is provided on the side of the lower positioning plate 2. The rotor axial fixing screw 13 engages with the threaded through hole to achieve axial positioning of the external rotor. Other components and connection methods are the same as any one of specific embodiments one to six.

[0032] Specific implementation method eight: Combination Figures 1 to 3This embodiment differs from specific embodiment one in that the measuring block assembly includes a measuring block 4, mounting screws 5, and locating pins 6. The measuring block 4 has an inverted L-shaped cross-section. The measuring block 4 is connected to the cylinder via the mounting screws 5, and the measuring block 4 is axially positioned via the locating pins 6. Other components and connection methods are the same as any one of specific embodiments one to seven.

[0033] Compared to existing technologies, this implementation method shortens the in-plant assembly cycle by 20%. By using positioning plate tooling to replace the rotor bearing function of the traditional bearing housing, the assembly process is simplified, reducing the complex operations and waiting time caused by the integrated assembly of the bearing housing and outer cylinder. Simultaneously, the new "external reflection value" measurement scheme improves measurement efficiency, avoids repeated assembly adjustments due to inaccurate measurements, further shortens the assembly cycle, and improves production efficiency. The innovative tooling also has a transport and fixing function, changing the traditional process where bearing housing components need to be shipped separately in advance. This achieves coordination between in-plant final assembly and on-site installation supply sequences, eliminating the risk of supply conflicts for critical path equipment. It ensures that all equipment during the power plant's infrastructure construction phase can be supplied in a timely manner according to a reasonable sequence, guaranteeing that the overall construction progress of the power plant is not affected and improving the stability and controllability of the project.

[0034] The new "external reflection value" measurement method ensures the accuracy of assembly data within the factory, enabling complete and accurate transmission of turbine assembly data from the plant to the site. On-site installation personnel can then perform installations based on this accurate data, reducing the workload of secondary adjustments, improving on-site installation accuracy, lowering installation costs and quality risks, and enhancing the overall installation quality of the turbine. The shortened assembly cycle and reduced on-site adjustments lower labor and material costs. Simultaneously, it avoids project delays caused by supply conflicts, reducing additional costs incurred due to delays and improving the company's economic efficiency.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tooling for the overall assembly of a steam turbine delivery module, characterized in that... It includes an upper positioning plate (1), a lower positioning plate (2), a tightening screw (3), and a measuring block assembly; An external cylinder is mounted on the outside of an 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 cylinder end face by means of a tightening screw (3) and a threaded hole. The lower half positioning plate (2) is installed on the lower part of the cylinder end face by means of a tightening screw (3) and a threaded hole. A measuring groove (10) is provided on the outer arc wall of the lower half positioning plate (2). The measuring groove (10) is a through groove. 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). The external rotor is installed on the brass coating (7).

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

3. The assembly tooling for a steam turbine integrated delivery module according to claim 1, characterized in that, Both the upper positioning plate (1) and the lower positioning plate (2) have a stop (11) on their back sides. The cylinder limits the upper positioning plate (1) and the lower positioning plate (2) through the stop (11).

4. The assembly tooling for a steam turbine integral delivery module according to claim 3, characterized in that, An adjusting shim (9) is installed at the stop (11).

5. The assembly tooling for a steam turbine integrated delivery module according to claim 1, characterized in that, Several measuring windows (12) are evenly provided on the inner arc-shaped wall of the lower positioning plate (2).

6. The assembly tooling for a steam turbine integrated delivery module according to claim 5, characterized in that, The number of measurement windows (12) is 3 to 5.

7. The assembly tooling for a steam turbine integrated delivery module according to claim 1, characterized in that... It also includes a rotor axial fixing screw (13), and a threaded through hole is provided on the side of the lower positioning plate (2). The rotor axial fixing screw (13) cooperates with the threaded through hole to achieve axial positioning of the external rotor.

8. The assembly tooling for a steam turbine integrated delivery module according to claim 1, characterized in that, The measuring block assembly includes a measuring block (4), mounting screws (5) and locating pins (6). The measuring block (4) has an inverted L-shaped cross section. The measuring block (4) is connected to the cylinder by mounting screws (5) and is axially positioned by locating pins (6).

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