Jiangkou Power Station is located in Fengkai County, Guangdong Province. The power station is equipped with two bulb-bulb turbine units with a single capacity of 20 units. It is the largest single-bulb capacity tubular unit designed and manufactured by China. Its thrust shaft. The bearing structure is based on the bearing parameters of 1 type of internal and external units, relying on the advantages and experience of the bearings manufactured by our company to optimize the design, so that the structure of the thrust bearing of Jiangkou Tubular Unit is reasonable, and the operation is stable at 75T, which is well received by users. The thrust bearing is a tune-in-duty unit configuration. It is installed on the downstream side of the generator rotor. It is composed of positive and negative thrust bearing guide bearings and is mounted on the turbine seat through a bearing bracket. Positive thrust shaft. Bearing continuous loads of 30,1. The guide bearing bears the rotor of the generator rotor and the small shaft, 1 continuous load. The counter thrust bearing bears an impact load of 52,1. The manufacturing quality of thrust bearings is related to the operation of the unit. Many new processes and process improvements have been taken during the process of assembly and assembly, and good results have been achieved. 2 thrust bearing Jiangkou Power Station bulb tubular turbine generator thrust bearing structure 1. 3 Combination thrust bearing plus 1 process 1. Bearing cover 2. Bearing support 3. Radial bearing 4. Reverse thrust seat 5. Reverse thrust shroud 6. Thrust bearing housing 7. Mirror plate 8. Forward thrust shroud 9. Peg nail 10 hydraulic jacks. Reverse rubber stamping 12. The outer diameter of the positive thrust bearing housing is 500. It is the basis of the entire bearing. Therefore, its processing precision is as follows: Shi Qing Qing Shi 73 brewing jiangkou bulb tubular hydroelectric generator thrust bearing manufacturing process Li Qiang, Liu Zhan Junzhe Erbin Motor Factory Co., Ltd., Harbin 150040, Heilongjiang, China The characteristics of compactness and stiffness were analyzed and studied. 3.2.1 The bearing bearing radial bearing sinking structure is a steel liner shell and cast babbitt alloy. The lower valve shoe is provided with a high-pressure oil hole along the axial direction, and the upstream end face is provided with a temperature measurement hole, and the upper half-wail tungsten gold free knife. Due to structural rigidity, etc. Milling to enlarge the structure will bring great difficulties to processing. Due to the processing, the rod milling cutter is longer, single-edged cutting, machining, and the length of the rod is easily deformed. If the structure is slightly modified, the structure 3 is very convenient to process. In order to reduce the stress concentration and ensure the strength, large, angle cutters can be used, and a few corners of the cutters can be used for 85. After milling, the boring burrs are used to reach the bottom and the quality meets the requirements. At the same time, the work is saved. The radial bearing pads have a diameter of 070, an axial height of 700, and a wall thickness of 55. The slabs are formed by rolling the steel sheet. Although the stress is still present after annealing, one field is deformed. In addition, during the processing and casting of tungsten gold, the nylon is dismantled several times during the process. Although there are positioning pins, the maximum deformation is 4.5, which is a minimum of 1.2. It is difficult to regroup after splitting. If you add an artifice lacing hole, you can use the lacing good 4 before each split. Although there is a slight deformation, it does not affect the quality. Tile blanks are similar to 5 through holes, plus 1 is more difficult. Because the hole depth reaches 700, it cannot be drilled on the machined surface. It must be processed on both sides of the NC rotary lathe to reduce the ratio of hole depth and straightness. What should be done in order to ensure the position of both sides of the drilling to avoid misalignment and during processing For each drill 15, you must leave the drill bit deeply. 3.2.1.2 Diameter Bearings Wages 1 Wafer Blank Internally Cast Tungsten Gold 5, the towel is heat deformed, and the fleece renews the fly joint surface and refines the hinge pin hole to eliminate distortion effects. The rough semi-finishing car should be divided during turning. After the roughing, the injury is controlled. After the semi-finishing, the drilling and attack sequence is performed and then the finishing vehicle is arranged. This arrangement can minimize deformation. After finishing the car can not be opened, otherwise the deformation of the workpiece is difficult to get back to the original state. In the process of bearing bushings, the quality can be guaranteed as long as the deformation is controlled. 3.2.2 Machining of bearing shells Radial bearing shells are also subject to deformation. The same measures can be taken to improve them. Radial bearing shell plus a difficult to add in the ten spherical surface of the mold and the elastic cutter grinding grinding ball, the diameter of the amount, and then scratch the ball to meet the requirements. 3.2.3 Counter-thrust bearing seats The machining of counter-thrust seats is difficult on the inner spherical surface. Grinding with a 13-disc grinding wheel with a guillotine cutter; Inner spherical processing suitable scraping research fan. 3.3 Thrust Bearings 3.3.1 Thrust Tile Machining Horizontal units have positive and negative thrust watts due to the axial bearing of two-way load. The positive and negative thrust sinks are the same as the standing station wood, and all are the fan-shaped sinkers of the babbitt cast steel. The positive thrust bearing is subjected to 2950 continuous load, and is supported by grid steel ball strut bolts; the reverse thrust bearing is subjected to 5100 shock load and the rice is supported by a 5 thick reverse thrust concrete made of oil-resistant rubber sheet. Tungsten gold and tile-shaped tiles are more mature in our company. The mirror plate is a double-mirror welding structure called a flap. The towel factory pushes the positive push and pushes the column force butterfly shell seat bolt 4.1. The bearing diameter lifts the lower valve diameter 1 bearing tile on the shaft in place. Push the pad into a square jack, tighten the lower flap diameter to the bearing bush, and let go of the crane. After lifting the upper valve diameter bearing bushing in place with the lower radial bearing bushing, release the crane. 4.2 Mounting the Radial Bearing Shell Lift the upper flap radial bearing shell beyond the square box and move it in the axial direction to place it in the radial bearing bush. The jack top is fixed. The following steps are the same as the diameter of the bearing bush. 4.3 Reverse thrust bearing housing assembly 4.4 Mirror plate assembly for the next wheel work, 7 and 12 stud bolts, the stud bolts are used to adjust the clearance of the positive thrust tile mirror plate. The shell is filled with oil, so the welding process must ensure good sealing. The thrust bearing shell should be machined from the thrust bearing seat to ensure dimensional accuracy. 4Bearing Assembly Horizontal Unit Human-type combined bearing is designed and manufactured by our company for the first time. It is considered that the bulb-type turbine unit has compact structure and small size. In order to ensure the quality, the thrust bearing is most determined to be pre-installed in the factory. In order to ensure that the entire pre-assembly is qualified, the following components are pre-installed separately. 1 Bearing bracket and counter-thrust bearing seat pre-installed; Pre-installed with bearing bracket and sealing cap; Radial bearing pre-installed; Thrust bearing pre-installed, pre-assembled and divided into two overall to be pre-installed. Spindle cylinder and ribs welded together. The two-valve mirror plate is bolted to the spindle and transmits torque through the flat keys. The mirror material is 25 forged steel, the outer diameter is 18, the inner diameter is 00, and it is more difficult to dry the mirror with 50 double mirrors. Before the grinding of the mirror plate, it is necessary to check the pendulum with the spindle. Since the mirror plate has been finely processed, there are only a few children, and it is very difficult for the assembly and disassembly. Only with a special lifting equipment can be completed 6. After the positive thrust mirror is machined, it is difficult to turn over the reverse thrust surface. Since the mirrors that have been processed cannot fall on the pad, the special sets of the tires are processed into the dies, and the processed surfaces are equipped with the protective covers. 7. The cover design will not cause the grinding disc to turn, and even when it is reversed, Causes the grinding effect to be poor, and the mirror surface is slightly slippery. 1. Position plate earth valve 2. It shaft 3. Key 4. Flat hanging beam 5. Pair rope 6. Manually Meng Lu 7. Hanging mirror board 8. Mirror plate scaring flap 1. Grip 2. Grinding plate Polishing plate 3. Mirror plate 4. Abortion 5. Snail 6. Protective cover 3.3.3 Axial bearing housing and positive thrust bearing housing and butyl thrust bearing housing are steel plate welded structures with an outer diameter of 12220, splitting. Each joint surface is sealed with a rubber strip. The bottom surface of the workpiece hits the reverse thrust pad. Reverse thrust bearing seat Radial bearing shell The gap between the diaphanous turns Insulation punching process The rotor coil turns into insulating material like a melamine glass cloth plate, and is thermally bonded to the copper bar by brushing. Due to the difference between the air cooling and hydrogen cooling structure, the inter-turn insulation of the hydrogen-cooled structure is punched and then adhered to the copper bar. The air-cooled coil is glued to the copper bar and then punched. This requires a special punching tool for the livestock. The punch is guided by a copper row hole and punches the strip hole. If the gap is too small, the punch can easily scrape to the wall of the hole, causing burrs and causing a short circuit between the turns. Large, the insulation will produce flash, affect ventilation. Through continuous investigation, we finally found out that the best combination of 4 vertical lines and end welding is due to the fact that the first coil of the thermal rotor coil adopts the angular intermediate frequency induction welding to form a ring-type structure, which is related to the sub-rotor shaft. The end width is from the top to the bottom. The bottom sill gradually becomes narrower and welding is more difficult. The special combination welding tool adopts linear and end positioning and clamping respectively, and is realized by means of a cam slide long and short moving plate press plate, which ensures the perpendicularity of the end part and the straight part, and realizes automatic blanking after single-spark welding. Satisfy the process requirements. Composite welding tools such as 7. 5 Conclusions The rotor coil of this station has adopted many new processes and equipments. After actual production and many tests after final release, it is confirmed that the various indicators of the coil completely meet or exceed the quality requirements, achieving the expected goals and proving the new Craftsmanship co-occurrence. At the same time, the successful trial production of the new structure of the full cold rotor coil also marks a new stage in the company's manufacturing level. Yesterday's introduction Yang Zhuo 4972, graduated from Nanjing Li 1 University in 1996. He is currently working on the process technology of the turbine generator coil. Standards meet the design requirements. Page 34 4.5. Axial Bearing Shell Assembling 1 Assemble the lower lobe thrust bearing shell assembly. After positioning, connect the upstream side with the counter-thrust bearing seat and the jack on the downstream side. The phantom lifting upper flap thrust bearing shell is assembled with the lower flap and is connected with the reverse thrust bearing seat. After passing the full inspection, disassemble the parts in the reverse order of installation. 5 Conclusions The manufacture and pre-assembly of thrust bearings for turbulent hydro-generators in Jiangkou bulbs proves that the 7-difficulty of horizontal-type units is due to the small overall size and compactness of the workpieces. The thin and easy-deformed machining requires higher precision than in-plant assembly and Site installation is more difficult. Many of our company's sophisticated numerical control equipment and complete process equipment guarantee the successful manufacture of this highly sophisticated high-tech child-bearing unit. After two years of operation, the two units of the Jiangkou Power Station have been operating for many years. Ming, the index of vibration, temperature and noise, etc. Introduction Li Qiang 1972, graduated from Harbin Machinery Industry Manufacturing School in July 1993, specialized in machinery manufacturing and process equipment. He is currently working in the Harbin Electric Machinery Plant Liability Company's hydropower branch technology exemption. He is engaged in the manufacture of hydro-generators and an assistant engineer. Liu Zhanjun 197 In July 1993, he graduated from the Department of Electrical Engineering of Harbin Electromechanical College. He now works in the technical department of the hydropower branch of Harbin Electric Machinery Co., Ltd., engaged in the manufacture of hydroelectric generators.
In the modern industries, advanced ceramic component is very commonly used in many, many electron vacuum devices, like electron tubes, high voltage feedthru, high current feedthru, vacuum interrupter, vacuum capacitors/Thyristors, X-ray tubes and power switches and so on.
The key point is what a metal coating covers on the surface of ceramic body, or ceramic base to achieve the vacuum hermetical and sealing, such as nickle plating, sliver plating, gold plating, copper plating and Tin plating. The main features for Vacuum Ceramic Component as below:
-Extremely high bond/brazing strengths
-High mechanical strength
-Minimum electric resistance and vacuum tightness
-Excellent insulation
The typical form for vacuum ceramic component is to be as an insulator, ceramic packaging and ceramic body etc.
Vacuum Ceramic Component Vacuum Ceramic Component,High Current Vacuum Ceramic Component,High Temperature Vacuum Component,Advanced Vacuum Chamber Ceramic Components Jinghui Industry Ltd. , https://www.ceramictek.com