Turbonator fan gap repairing and scraping device

Abstract

The utility model relates to a turbonator fan gap repairing and scraping device which comprises a fixing plate, a bearing plate is vertically welded to the front side of the fixing plate, two adjusting nuts are fixedly arranged on one side of the bearing plate and are arranged on the two sides of the fixing plate respectively, the adjusting nuts are in threaded connection with adjusting screw rods respectively, and the adjusting screw rods are in threaded connection with the bearing plate. The front end of the adjusting screw rod is fixedly connected with an adjusting plate, the adjusting plate is connected with the bearing plate through the connecting bolt, the front end of the adjusting plate is fixedly welded with a trimming knife head, and the rear side of the fixing plate is fixedly connected to a generator rotor through a fixing bolt. According to the utility model, the adjusting bolt is used for pushing the adjusting plate and the scraping knife head to adjust the scraping value of the wind guide ring when the rotor of the generator is turned, so that the clearance repairing process is completed. And during construction, the set scraping data can be completed by finely adjusting the adjusting bolt and turning the rotor, so that the data accuracy and the uniform gap are ensured, the personal workload is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator installation technology, and in particular to a steam turbine generator fan gap scraping device. Background Technology

[0002] The turbine generator fan clearance refers to the gap between the top of the fan blades on the steam side and excitation side of the generator and the guide ring. Due to the many assembly processes of the generator stator and rotor, this gap value is basically adjusted on-site to ensure accuracy. Therefore, the guide ring is left with a repair margin when it leaves the factory. After the generator is installed through the rotor and the end cover, and before the generator fan blades are installed, the guide ring is measured and scraped to ensure that the gap between the guide ring and the top of the generator rotor fan blades meets the design requirements.

[0003] The clearance between the air guide ring and the generator rotor fan blades is usually adjusted manually using a file or angle grinder. However, this manual grinding process, especially at various angles and due to the limited internal space of the generator, often results in inconsistent clearances. While it ensures the clearance is within the design range, the clearance can easily fall within either the upper or lower limit of the design value, leading to significant variations in the overall clearance. Furthermore, manually ground air guide rings often have poor aesthetics. Additionally, the manual grinding process generates a large amount of dust and particles, posing a significant health risk to workers and impacting equipment cleanliness. Utility Model Content

[0004] This utility model aims to address the shortcomings of existing technologies by providing a turbine generator fan clearance scraping device and its usage method.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a turbine generator fan clearance scraping device, comprising: a fixed plate, a bearing plate vertically welded to the front side of the fixed plate, two adjusting nuts fixedly disposed on one side of the bearing plate, the adjusting nuts being respectively disposed on both sides of the fixed plate, adjusting screws being screwed to the adjusting nuts respectively, an adjusting plate being fixedly connected to the front end of the adjusting screws, the adjusting plate being arranged parallel to the bearing plate, a U-shaped groove being formed on the adjusting plate, a connecting bolt being disposed at the U-shaped groove, the adjusting plate being connected to the bearing plate through the connecting bolt, a scraping head being fixedly welded to the front end of the adjusting plate, and the rear side of the fixed plate being fixedly connected to the generator rotor through fixing bolts.

[0006] Furthermore, the scraper head is made of tool steel.

[0007] The beneficial effects of this utility model are as follows: After assembling the fixed plate, bearing plate, adjusting plate, and scraping head, the adjusting plate and scraping head are pushed using adjusting bolts to adjust the scraping value of the air guide ring when the generator rotor is rotated, thus completing the gap adjustment process. During construction, by fine-tuning the adjusting bolts, the set scraping data can be completed by rotating the rotor, ensuring accurate data, uniform gap, and reducing individual workload. Work efficiency is improved, and the larger the gap adjustment data, the higher the efficiency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a schematic diagram of the installation structure when the present invention is in use. Figure 1 ;

[0010] Figure 3 This is a schematic diagram of the installation structure when the present invention is in use. Figure 2 ;

[0011] In the diagram: 1-Fixing plate; 2-Bearing plate; 3-Adjusting plate; 4-Scraping head; 5-Fixing bolt; 6-Adjusting bolt; 7-Connecting bolt; 8-Air guide ring; 9-Generator rotor; 10-Generator fan blade;

[0012] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments:

[0014] like Figures 1-3 As shown, a turbine generator fan clearance scraping device includes: a fixed plate 1, a bearing plate 2 vertically welded to the front side of the fixed plate 1, an adjusting plate 3 parallelly arranged above the front side of the bearing plate 2, a scraping head 4 fixedly welded to the front end of the adjusting plate 3, two adjusting screws 6 fixedly connected to the rear end of the adjusting plate 3, the adjusting screws 6 being respectively located on both sides of the fixed plate 1, and a matching nut screwed onto the adjusting screw 6, the nut being fixedly installed above the bearing plate 2, a U-shaped groove being formed on the adjusting plate 3, a connecting bolt 7 passing through the U-shaped groove, the adjusting plate 3 being connected to the bearing plate 2 by the connecting bolt 7, and the rear side of the fixed plate 1 being fixedly connected to the generator rotor 9 by fixing bolts 5.

[0015] Specifically, the fixing plate 1 securely fixes the entire device to the position where the fan of the generator rotor 9 should be installed by fixing bolts 5. After determining the scraping data, the adjusting plate 3 is pushed by rotating the adjusting screw 6 so that the scraping head 4 is pressed against the air guide ring 8. The air guide ring 8 can be scraped by rotating the generator rotor 9.

[0016] The scraper head 4 is made of tool steel.

[0017] A method of using a steam turbine generator fan clearance scraping device, the method comprising the following steps:

[0018] S1. Loosen the connecting bolt 7, rotate the adjusting screw 6 to move the adjusting plate 3 backward, ensuring that the scraper head 4 is withdrawn a certain distance, so that there is a certain gap between the scraper head 4 and the air guide ring 8.

[0019] S2. Install a generator fan blade 10 on the generator rotor 9. Rotate the generator rotor 9 one revolution. Measure the gap between the top of the generator fan blade 10 and the air guide ring 8 with a feeler gauge every 45° of rotation and record the value. After completion, determine the scraping value of the air guide ring 8 according to the design requirement range of the top of the generator fan blade 10 and the air guide ring 8.

[0020] S3. After determining the scraping value that the air guide ring 8 needs to be scraped, rotate the adjusting screw 6 to push the adjusting plate 3 forward. After confirming that the front end of the scraping head 4 is in close contact with the air guide ring 8, calculate the angle of the adjusting screw 6 to rotate again by adjusting the pitch of the adjusting screw 6, so that the distance the adjusting screw 6 advances is the scraping value of the air guide ring 8. After tightening the adjusting screw 6 to the calculated rotation angle, use the connecting bolt 7 to fix and lock the adjusting plate 3 and the bearing plate 2.

[0021] S4. Rotating the generator rotor 9 causes the scraping head 4 to scrape the air guide ring 8, performing 3-4 scraping passes with a scraping value of 0.1-0.2mm and 1 fine scraping pass with a scraping value of 0-0.05mm. During the scraping process, a vacuum cleaner moves alongside the scraping device. The vacuum cleaner removes the scraped powder and particles, reducing the impact of dust and particles on personnel and equipment.

[0022] Generally, based on the measured gap value between the air guide ring 8 and the fan blade 10 that needs to be scraped, the process of adjusting the gap between the generator air guide ring 8 and the fan blade 10 is completed after 3-4 scrapings and 1 fine scraping by adjusting this device, thus achieving high-efficiency and high-quality assembly.

[0023] The present invention has been described above by way of example. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A device for scraping the fan clearance of a steam turbine generator, characterized in that, include: A fixed plate (1) is provided, with a bearing plate (2) vertically welded to the front side of the fixed plate (1). An adjusting plate (3) is arranged parallel to the front side above the bearing plate (2). A scraping head (4) is fixedly welded to the front end of the adjusting plate (3). Two adjusting screws (6) are fixedly connected to the rear end of the adjusting plate (3). The adjusting screws (6) are respectively located on both sides of the fixed plate (1). A matching nut is screwed onto the adjusting screw (6). The nut is fixedly installed above the bearing plate (2). A U-shaped groove is provided on the adjusting plate (3). A connecting bolt (7) passes through the U-shaped groove. The adjusting plate (3) is connected to the bearing plate (2) through the connecting bolt (7). The rear side of the fixed plate (1) is fixedly connected to the generator rotor (9) through a fixing bolt (5).

2. The turbine generator fan clearance scraping device according to claim 1, characterized in that, The scraping head (4) is made of tool steel.

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