Turbonator fan gap repairing and scraping device and using method

Abstract

The invention relates to a turbonator fan gap repairing and scraping device and a using method, the turbonator fan gap repairing and scraping device 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, the adjusting nuts 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. The adjusting bolt is used for pushing the adjusting plate and the scraping knife head, the scraping value of the wind guide ring is adjusted when the rotor of the generator is turned, and 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] The invention relates to the technical field of steam turbine generator installation, and in particular to a steam turbine generator fan gap scraping device and a use method thereof. Background Art

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

[0003] Usually, the gap between the air guide ring and the fan blade of the generator rotor is adjusted by manual grinding with a file or an angle grinder. Due to the limitation of the narrow internal space of the generator during long-term manual grinding and at different angles, the entire circle gap between the air guide ring and the top of the fan blade is manually scraped out. Although the gap can be within the design range, the entire circle gap is prone to being within the upper or lower limit of the design value, and the data of the entire circle gap has a large range. In addition, the air guide ring that has been manually scraped has problems such as poor appearance. At the same time, a large amount of dust and particles are generated during the manual grinding process, which has a great harm and impact on the health of construction workers and the cleanliness of equipment. Summary of the invention

[0004] The present invention aims to solve the deficiencies of the prior art and provides a steam turbine generator fan gap scraping device and a use method.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a steam turbine generator fan gap scraping device, comprising: a fixing plate, a bearing plate is vertically welded to the front side of the fixing plate, two adjusting nuts are fixedly provided on one side of the bearing plate, the adjusting nuts are respectively arranged on both sides of the fixing plate, the adjusting nuts are respectively screwed with adjusting screws, the front end of the adjusting screws is fixedly connected to the adjusting plate, the adjusting plate is arranged parallel to the bearing plate, a U-shaped groove is opened on the adjusting plate, a connecting bolt is arranged at the U-shaped groove, the adjusting plate is connected to the bearing plate via the connecting bolt, a scraping blade head is fixedly welded to the front end of the adjusting plate, and the rear side of the fixing plate is fixedly connected to the generator rotor via fixing bolts.

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

[0007] A method for using a fan gap scraping device for a steam turbine generator, the method comprising the following steps:

[0008] S1. Loosen the connecting bolts and rotate the adjusting screw to move the adjusting plate backwards to ensure that the scraping head is withdrawn a certain distance, leaving a certain gap between the scraping head and the air guide ring;

[0009] S2. Install a generator fan blade on the generator rotor, rotate the generator rotor one circle, and measure the gap value between the top of the generator fan blade and the air guide ring with a feeler gauge every 45° rotation and keep a record. After completion, determine the scraping value of the air guide ring according to the design requirement value range of the top of the generator fan blade and the air guide ring;

[0010] S3. After determining the scraping value that needs to be scraped for the air guide ring, rotate the adjustment screw to push the adjustment plate forward, and after confirming that the front end of the scraping blade head is in close contact with the air guide ring, calculate the angle of the adjustment screw to be rotated again by adjusting the pitch of the screw so that the distance the adjustment screw is pushed forward is the scraping value for the air guide ring. After the adjustment screw is screwed to the calculated rotation angle, the adjustment plate and the bearing plate are fixed and locked with the connecting bolts;

[0011] S4. Rotate the generator rotor so that the scraper head scrapes the air guide ring. Perform 3-4 scrapings with a scraping value of 0.1-0.2mm and 1 fine scraping with a scraping value of 0-0.05mm. During the scraping process, a vacuum cleaner is used to follow the scraping device.

[0012] The beneficial effect of the present invention is that after the fixing plate, the bearing plate, the adjustment plate and the scraping blade head are assembled, the adjustment bolt is used to push the adjustment plate and the scraping blade head, and the scraping value of the air guide ring is adjusted when the generator rotor is rotated to complete the gap repair process. During construction, the set scraping data can be completed by fine-tuning the adjustment bolt and rotating the rotor, ensuring accurate data, uniform gaps, and reducing personal workload. The work efficiency is improved, and the larger the gap adjustment data, the higher the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 The installation structure of the present invention is shown in FIG. Figure 1 ;

[0015] Figure 3 The installation structure of the present invention is shown in FIG. Figure 2 ;

[0016] In the figure: 1-fixed plate; 2-carrying plate; 3-adjusting plate; 4-scraping blade head; 5-fixing bolt; 6-adjusting bolt; 7-connecting bolt; 8-air guide ring; 9-generator rotor; 10-generator fan blade;

[0017] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with embodiments:

[0019] like Figure 1 to Figure 3 As shown, a steam turbine generator fan gap scraping device comprises: a fixed plate 1, a bearing plate 2 is vertically welded to the front side of the fixed plate 1, an adjustment plate 3 is arranged in parallel to the upper front side of the bearing plate 2, a scraping blade head 4 is fixedly welded to the front end of the adjustment plate 3, and two adjusting screws 6 are fixedly connected to the rear end of the adjustment plate 3, the adjusting screws 6 are respectively arranged on both sides of the fixed plate 1, and matching nuts are screwed on the adjusting screws 6, and the nuts are fixedly installed above the bearing plate 2, a U-shaped groove is opened on the adjustment plate 3, and a connecting bolt 7 is passed through the U-shaped groove, the adjusting plate 3 is connected to the bearing plate 2 through the connecting bolt 7, and the rear side of the fixed plate 1 is fixedly connected to the generator rotor 9 through the fixing bolt 5.

[0020] Specifically, the fixing plate 1 firmly fixes the entire device at the position where the fan of the generator rotor 9 should be installed through the fixing bolts 5. After the scraping data is determined, the adjusting screw 6 is rotated to push the adjusting plate 3 so that the scraping head 4 is close to the air guide ring 8, and the generator rotor 9 can be rotated to scrape the air guide ring 8.

[0021] The scraper head 4 is made of tool steel.

[0022] A method for using a fan gap scraping device for a steam turbine generator, the method comprising the following steps:

[0023] S1. Loosen the connecting bolt 7, rotate the adjusting screw 6 to move the adjusting plate 3 backward, ensure that the shaving blade head 4 is withdrawn a certain distance, and leave a certain gap between the shaving blade head 4 and the air guide ring 8;

[0024] S2. Install a generator fan blade 10 on the generator rotor 9, rotate the generator rotor 9 one circle, and measure the gap value between the top of the generator fan blade 10 and the air guide ring 8 with a feeler gauge every 45° rotation and make a record. After completion, determine the scraping value of the air guide ring 8 according to the design requirement value range of the top of the generator fan blade 10 and the air guide ring 8;

[0025] S3. After determining the scraping value that needs to be scraped on the air guide ring 8, rotate the adjusting screw 6 to push the adjusting plate 3 forward. After confirming that the front end of the scraping blade head 4 is in close contact with the air guide ring 8, calculate the angle of the adjusting screw 6 to be rotated again by adjusting the pitch of the screw 6, so that the distance advanced by the adjusting screw 6 is the scraping value of the air guide ring 8. After the adjusting screw 6 is screwed to the calculated rotation angle, the adjusting plate 3 and the bearing plate 2 are fixed and locked with the connecting bolts 7.

[0026] S4, rotating the generator rotor 9, so that the scraping blade head 4 scrapes the air guide ring 8, a total of 3-4 scrapings with a scraping value of 0.1-0.2mm and 1 fine scraping with a scraping value of 0-0.05mm, during the scraping process, a vacuum cleaner is used to follow the scraping device. The vacuum cleaner sucks away the scraped powder and particles to reduce the impact of dust and particles on human body and equipment.

[0027] Generally, according to the measured gap value between the air guide ring 8 and the fan blade 10 that needs to be scraped, by adjusting the device to perform 3-4 scrapings and 1 fine scraping, the gap repair process between the generator air guide ring 8 and the fan blade 10 is completed, achieving high-efficiency and high-quality process assembly.

[0028] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A fan gap scraping device for a steam turbine generator, characterized in that: include: A fixing plate (1), a bearing plate (2) is vertically welded to the front side of the fixing plate (1), an adjustment plate (3) is arranged in parallel to the upper front side of the bearing plate (2), a scraper head (4) is fixedly welded to the front end of the adjustment plate (3), and two adjustment screws (6) are fixedly connected to the rear end of the adjustment plate (3), the adjustment screws (6) are respectively arranged on both sides of the fixing plate (1), and matching nuts are screwed on the adjustment screws (6), and the nuts are fixedly installed above the bearing plate (2), a U-shaped groove is opened on the adjustment plate (3), and a connecting bolt (7) is passed through the U-shaped groove, and the adjustment plate (3) is connected to the bearing plate (2) through the connecting bolt (7), and the rear side of the fixing plate (1) is fixedly connected to the generator rotor (9) through the fixing bolt (5).

2. A steam turbine generator fan gap scraping device according to claim 1, characterized in that: The material of the scraper head (4) is tool steel.

3. The method for using the fan gap scraping device of a steam turbine generator according to claim 2, characterized in that: The method of use comprises the following steps: S1. Loosen the connecting bolt (7), rotate the adjusting screw (6) to move the adjusting plate (3) backward, ensure that the shaving blade head (4) is withdrawn a certain distance, and leave a certain gap between the shaving blade head (4) and the air guide ring (8); S2. Install a generator fan blade (10) on the generator rotor (9), rotate the generator rotor (9) one circle, and measure the gap value between the top of the generator fan blade (10) and the air guide ring (8) with a feeler gauge every 45° rotation and keep a record. After completion, determine the scraping value of the air guide ring (8) according to the design requirement value range of the top of the generator fan blade (10) and the air guide ring (8); S3. After determining the scraping value that needs to be scraped for the air guide ring (8), rotate the adjusting screw (6) to push the adjusting plate (3) forward, and after confirming that the front end of the scraping blade head (4) is in close contact with the air guide ring (8), calculate the angle at which the adjusting screw (6) is rotated again by adjusting the pitch of the screw (6) so that the distance the adjusting screw (6) is pushed forward is the scraping value for the air guide ring (8). After the adjusting screw (6) is screwed to the calculated rotation angle, the adjusting plate (3) and the bearing plate (2) are fixed and locked with the connecting bolt (7); S4, rotating the generator rotor (9) so that the scraper head (4) scrapes the air guide ring (8), performing 3-4 scrapings with a scraping value of 0.1-0.2 mm and 1 fine scraping with a scraping value of 0-0.05 mm. During the scraping process, a vacuum cleaner is used to follow the scraping device.

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