Jiangkou Power Station is located in Fengkai County, Guangdong Province. The power station is equipped with two bulb-flowing water wheel hair-carrying units with a single unit capacity of 20. It is the largest single-capacity bulb tubular unit designed and manufactured by China. Its thrust shaft. The bearing structure is based on the bearing parameters of the 1+ internal and external 1 type unit, relying on the advantages and experience of our company to manufacture the bearing, and optimize the design, so that the thrust bearing structure of the Jiangkou Tubular Unit is reasonable, and the operation is stable at 75T, which is well received by users. The thrust bearing is a cross-flow unit main structure, which is arranged on the downstream side of the generator rotor and is composed of a forward and reverse thrust bearing guide bearing and is mounted on the turbine tubular seat through the bearing bracket. Positive thrust shaft. Under the continuous load of 30,1. The guide bearing is subjected to the generator rotor turbine runner and small shaft, 1 continuous load. The thrust bearing bears the impact load of 52, 1. The manufacturing quality of the thrust bearing is related to the operation of the unit. Many new processes and process improvements have been taken in the process of assembly and assembly, and good results have been achieved. 2 thrust bearing Jiangkou power station bulb tubular hydro-generator thrust bearing structure 1. 3 combined thrust bearing plus 1 process 1. Bearing cover 2. Bearing bracket 3. Radial bearing 4. Reverse thrust seat 5. Reverse thrust tile 6. Thrust bearing shell 7. Mirror plate 8. Forward thrust tile 9. Pillar nail 10 oil pressure jacks. Reverse rubber stamping 12. The outer diameter of the positive thrust bearing housing is similar to 500. It is the basis of the whole bearing, so its processing precision, the glaze dish Shi 73 broth jiangkou bulb tubular hydro-generator thrust bearing manufacturing process Li Qiang, Liu The analysis of the compact and rigid structure of the military-ranked Erbin Electric Machinery Co., Ltd. and Harbin 150040 in Heilongjiang Province was carried out. 3.2.1 Bearing bush The radial bearing sink structure is a steel-lined outer casing and an inner cast babbitt alloy. The lower valve wall is provided with a high-pressure oil hole in the axial direction, the upstream side end surface is provided with a temperature measuring hole, and the upper half-watt tungsten gold has an empty knife. Due to structural rigidity, etc. 3.2.1.1 乩 åŠ å·¥ 介 介 åŠ å·¥ åŠ å·¥ åŠ å·¥ 2 2 2 Milling to enlarge the structure brings great difficulty to the machining. Due to the processing, the rod milling cutter is long, and it is a single-blade cutting, processing, and the length is easy to be deformed. If the structure is slightly modified, the structure is very convenient to process. In order to reduce stress concentration and ensure strength, large and angular milling cutters can be used. The angle of the knife is 85. After the milling, the bottom of the boring tool is boring, the quality is up to the requirement, and the work is saved. The radial bearing bush has a diameter of 070, an axial height of 700, and a brick wall thickness of 55. The tile blank is formed by roll forming. Although the annealing process is performed, the stress still exists and one field is deformed. In addition, in the process of processing and casting tungsten gold, the nylon is disassembled several times. Although the positioning pin is positioned, the maximum deformation is up to 4.5 and the minimum is 1.2, and it is difficult to regroup after the splitting. If you add 1 art lacing hole, the lacing will be good for 4 before each splitting. Although it has slight deformation, it does not affect the quality. The diameter of the slab is similar to that of the 5 through holes. It is difficult to add 1 to it. Due to the depth of the hole up to 700, the machined surface cannot be drilled. It is necessary to machine on both sides of the CNC tire changing machine to reduce the ratio of the hole depth to the straight line. The machining is to ensure the position of the two sides of the hole to avoid misalignment, and during the processing. Every 15 drills, the depth must be removed from the drill bit. 3.2.1.2 Diameter bearing watts plus 1 watt blank cast tungsten gold 5, the towel is hot-deformed, the fiber is re-finished and the joint surface is finely reamed to eliminate the influence of deformation. In the turning process, the roughing and semi-finishing vehicles should be divided. After the rough car is controlled, the semi-finished car is drilled and then refined, so that the arrangement can minimize the deformation. After the car is finished, it cannot be disassembled, otherwise the deformation of the workpiece is difficult to retrieve. As long as the deformation of the radial bearing bush is controlled, the quality can be guaranteed. 3.2.2 Machining of the radial bearing shell machining to the bearing shell is also subject to deformation. The same measures can be taken to improve. The radial bearing shell adds 1 difficulty to the outer spherical surface of the ten outer spherical surface and the elastic arbor to grind the outer spherical surface, and the diameter is retained, and then the spherical surface is scraped to meet the requirements. 3.2.3 Reverse thrust bearing housing processing The reverse thrust bearing housing is difficult to machine on the inner spherical surface, with a lever knife and 13 bowl-shaped grinding wheel; it is matched with the radial bearing shell. Internal spherical processing is suitable for scraping. 3.3 Thrust bearing 3.3.1 Thrust tile processing Horizontal unit has two-way load due to axial direction, so there is a positive and negative thrust watt. The forward and reverse thrust sinking structures are the same, and are the fan-shaped sinks of the slab cast babbitt. The positive thrust bearing is subjected to a continuous load of 2950, ​​and is supported by a lattice steel ball strut bolt; the reverse thrust sink is subjected to an impact load of 5,100, and the rice is supported by a 5-thick reverse thrust weir made of an oil resistant rubber sheet. Tungsten gold, the shape of the tile is more mature in our company, and I will not go into details here. The mirror plate is a welded structure with a double mirror surface called a flap. The towel factory pushes the plate and pushes the positive push rod to push the column. The force of the butterfly shell and the seat bolt 4.1 is installed with the bearing tile to lift the lower valve diameter 1 bearing tile on the shaft. Push the square to place the jack, tighten the lower valve diameter to the bearing tile, and let go of the crane. Lift the upper valve diameter 1 bearing tile position and the lower valve radial bearing tile handle, then release the crane. 4.2 Install the radial bearing shell to lift the upper petal radial bearing shell beyond the square box, move in the axial direction at the radial bearing bush, and the jack is firmly fixed. The following steps are the same as the bearing installation of the bearing. 4.3 Reverse thrust bearing housing assembly 4.4 mirror plate assembly lower wheel work, 7 and 12 pillar bolt pad cylinder, the pillar bolt is used to adjust the gap of the positive thrust tile mirror plate. The shell is filled with oil, so the welding process must ensure a good seal. The thrust bearing shell should be machined from the thrust bearing housing to ensure dimensional accuracy. 4 bearing assembly horizontal unit type combination bearing is the first design and manufacture of our company, and consider the bulb tubular unit with compact structure and small size. In order to ensure the quality, the thrust bearing is pre-assembled in the factory. In order to ensure the overall pre-installation qualification, the following components are pre-installed separately. 1 bearing bracket and reverse thrust bearing seat pre-assembled; pre-assembled with bearing bracket and sealing cover; radial bearing pre-assembled; thrust bearing pre-assembled, pre-assembled, the whole two-petal to be pre-assembled. The main shaft cylinder and the rib are welded. The two-piece mirror plate is fixed with a bolt pin and the spindle transmits torque through a flat key. The mirror material is 25 forged steel, the outer diameter makes the 18 inner diameter structure 00, and the dry 50 double mirror structure mirror plate is more difficult. Before the mirror plate is ground, it must be checked with the spindle to check the swing. Since the mirror plate has been finished, there are only a few children, so it is very difficult to assemble and disassemble. Only with special lifting tools can be completed. After the positive thrust mirror is processed, it is difficult to turn over the counter thrust surface. Since the mirror surface that has been processed cannot fall on the pad cylinder, the special tire casing has to be processed in the process of being processed, and the protective surface of the machined surface must be equipped with a protective cover. 7. The design of the gland does not cause the grinding disc to rotate, or even reverse. The grinding effect is not good, and the mirror surface is slightly slippery. 1. Bit plate soil valve 2. Its shaft 3. Key 4. Flat lifting beam 5. Pair of rope 6. Manual Meng Lu 7. Hanging mirror plate 8. Goggle plate scare 1. Gland 2. Research disk polishing plate 3. Mirror plate 4. Abortion 5. Screw 柃 6. Protective cover 3.3.3 Thrust bearing shell and positive thrust bearing seat Jiading thrust bearing shell is steel plate welded structure, outer diameter is 12220, split. Each joint surface is sealed with a rubber strip. The bottom surface of the workpiece is reverse thrust. The thrust bearing is reversed. The radial bearing shell is made of the intertwined insulation punching process. The rotor coil is insulated like a thick melamine glass cloth board, which is thermally bonded to the copper row by brushing. Due to the difference between the air-cooled and hydrogen-cooled structures, the inter-turn insulation of the hydrogen-cooled structure is adhered to the copper row after punching the hole, and the air-cooled coil is to stick the pad to the copper row and then punch. This requires a punching tool for the animal. The punch is guided by the copper hole and punches the hole of the pad. If the gap is too small, the punch is easily scraped to the wall of the hole, causing burrs, causing a short circuit between the turns; Large, the insulation will produce burrs and affect ventilation. Through continuous evaluation, we finally found the best 4 vertical line and end combination welding. Because the thermal power rotor coil is the first to adopt the angular intermediate frequency induction welding, the structure of the ring-shaped whole is composed of the sub-rotor shaft, and the end width is from the top to the top. The bottom is gradually narrowed and the welding is difficult. The special combination welding tool adopts the positioning of the straight line and the end part respectively, and is realized by the device such as the cam slide rail and the short moving plate pressing plate, which not only ensures the verticality of the end portion and the straight portion, but also realizes the automatic blanking after the single-twist welding. Meet the process requirements. Combination welding tools such as 7. 5 Conclusions The rotor coil of this station adopts many new processes and equipments. After several tests of actual production and final off-line, it is confirmed that the coil indexes have completely met or exceeded the quality requirements, and achieved the expected goals, which proves that we adopt new Craftsmanship is scientifically achieved. At the same time, the trial production of the new structure of the fully cold rotor coil was successful, and the standard of the Harbin company's manufacturing level has reached a new level. Yesterday, Yang Pearl 4972 was graduated from Nanjing Liyi University in 1996. Now Harbin Electric Machinery Co., Ltd. is engaged in the manufacturing process of steam turbine generator coils. The standards meet the design requirements. Stopping page 34 4.5 Thrust bearing shell assembly 1 Lifting the lower-lobe thrust bearing shell assembly, after the position, the upstream side is connected with the thrust bearing housing, and the downstream side jack is firmly fixed. The phantom lifting upper thrust thrust bearing shell is assembled and seated with the lower flap, and then coupled with the reverse thrust bearing housing. After a thorough inspection, disassemble the components in the reverse order of installation. 5 Conclusion Through the manufacture and pre-assembly of the thrust bearing of the estrous turbine hydroelectric generator of Jiangkou, it is proved that the seven difficulties of the horizontal unit are that the overall size of the compact structure is thin and the workpiece is easy to be deformed, and the precision is higher than that in the factory. Site installation is more difficult. Our company's many sophisticated CNC equipment and complete process tooling ensure the successful manufacture of this difficult and high-tech children's unit. After two years of operation of the two units of Jiangkou Power Station, Ming, the performance index of the pendulum position temperature and noise, etc. Li Qiang 1972, graduated from Harbin Machinery Industry Manufacturing School in July 1993, majoring in mechanical manufacturing and process equipment. Currently working in Harbin Electric Machinery Co., Ltd. Licensing Company Hydropower Branch Factory Technology Exemption, engaged in hydro-generator manufacturing 1 art work, assistant engineer. Liu Zhanjun graduated from Harbin Electromechanical College in July 1993. He is currently working in the technical department of Hydropower Branch of Harbin Electric Machinery Co., Ltd., and is engaged in the manufacture of hydroelectric generators.
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