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22 stator structure and installation 21 stator structure features stator frame agricultural general steel plate welded structure, divided into 4 lobes, transported one by the small joint plate at the seat of the splitter machine to synthesize, body. The difference with the stator frame of a similar motor made in China is that the Dingguang machine is not in the top ring plate of the combined frame; the positioning rib on the stator machine is double-block structure, and most of the positioning ribs are welded in the factory. Finished, only the locating ribs at the joints are drawn and welded at the construction site, and the welding requirements are very high. The stator core tensioning screw windshield and the horizontal adjustment screw are also welded in the factory. The stator core is tightly constructed into a small toothed plate structure made of stainless steel.
The stator coil is a single-turn double-stacked winding with a total of 972 winding bars. An interference fit is used between the stator bars and the core slots, which is different from the interference fit of the commonly used plug semiconductor pads and the interference fit of the slot liner. Moreover, the structure of the wire rod adopts the special anti-halation structure of the company 0, and the resin is a kind of temperature-cured semiconductor silicone rubber, which has good elasticity and thermal conductivity.
The stator bars are fixed in the slots and are slotted. Oblique corrugated plate structure. The corrugated board is compressed by the cross-bend to compress the wire rod, and the bobbin which is produced by the compression of the corrugated board is effectively prevented from loosening by the operation of the unit 1. The bus ring is connected to the stator wire and the agricultural multi-strand copper wire.
2.2 Stator mounting 1 Stator base assembly The stator base is transported to the installation site. When assembling the circle, first check the combined surface clearance. It is acceptable to insert with a 0.041 feeler gauge. Adjust the level and elevation of the stator frame by adjusting the elevation screw level. Then use the lead hammer piano line method to re-test the semi-finished technology of the positioning ribs in the factory. Difficult to straighten, etc., to remember the distribution centerline of the positioning ribs behind the circle of the base. Taking this as the center, according to the company, the locating rib radius deviation allowed by the company allows the 6380.69±0.84mm chord deviation to allow the 218.78±0.125 perpendicularity to exceed the requirement of 1 in the full length range, and the joint of the welded stator frame is mounted. Position the ribs. For example, if the dimensions of the locating ribs are inconsistent, it must be adjusted in the hall, and the first part should be reloaded. 2.2.2 Stator core loading 2.22.1 Lower pressure plate installation and adjustment 81 pieces of lower tooth plate The level and elevation requirements of the upper tooth platen specified on the paper. Adjust the adjusting top wire of the outer circle of the tooth pressure plate so that the inner side of the pressing finger is higher than the outer side 6.4, and the allowable deviation is ±0.13mm.
22.2.2 The total weight of the stator core assembled core is 3651. Before the formal stacking, the appearance quality of the stator silicon steel sheet and the ventilation groove sheet is first checked, and the silicon steel sheet or the ventilation groove sheet with the embossed curled edge is not allowed. . The stacking method is a counterclockwise spiral rise stack. The first silicon steel sheet of each layer is half a whole piece of 6 groove distances, and the whole piece of 12 grooves is staggered with 14 pieces of silicon steel sheets. When stacking, the molybdenum sulfide is coated on the dovetail of the positioning rib. This can reduce the friction between the silicon steel sheet and the positioning rib during stacking, facilitate stacking, and check the punching burr of each silicon steel sheet at any time. During the stacking process, two locating pins are placed on each silicon steel sheet for positioning. Used to make a trough shape. And as the height of the core increases, the positioning pin is alternately raised, and if the groove shape is found to be bad. Insert the auxiliary positioning pin, and the side of the stack is called a metal hammer such as a wooden hammer nylon hammer to strike the inner circle of the silicon steel sheet, so that the silicon steel sheet and the positioning rib are pressed tightly. At the same time, in order to improve the integrity of the stator core, when stacking the end silicon steel sheets at the ends of the iron 5, the 6277 epoxy resin is applied on the sheet. After the stator core stacking is compacted, the deviation is found to be large, and the adjusting gasket can be inserted at a low position. The padding pads on each layer should not exceed the layer. The padded adjustment pad is not thrown on the positioning rib. According to the system, 6277 epoxy resin is used for fixing.
22.23 Stator core compression stator core is divided into 7 times, each pressing is 450-50. The last pressing height is iron core stacking to about 100,1 height from the top of the core. Before each compaction, the steel core is tightened with a steel plate to tighten the screw and steel pipes of different lengths. Tighten the screw 1 and apply some 4327 molybdenum sulfide. When tightening, press each time (1), and gradually increase the tightening force until the final tightening torque of 12801 is reached. To avoid cattle production. For more people's volatility, press the clockwise one turn counterclockwise one turn. The stator core can be pressed and tested to remove the compacting work, and should be reduced by 200 times! Tightening the torque, counterclockwise one turn clockwise requires the loose sweat to tighten the screw. In order to prevent the tensioning screw from suddenly losing the tightening force, the core rebounds less than 1 after the stator core is finished. After the magnetization test, all the tightening screws are tightened once according to the tightening torque of 1280.1. 1 9 22.2.4 Stator core At the time of checking the stacking process, use the grooved rod to check the groove at any time. Draw the grooved rod with the groove, insert the adjusting rod, and use a wooden hammer or nylon hammer to adjust the alignment to make the silicon steel sheet groove aligned.
1. Each time the stator core is tightened. It is necessary to test the tensioning screw 3 stator bar installation 3.1 before the wire is processed before the wire core is processed. In order to make the iron core stable, 6277 epoxy resin is applied to the teeth of the core silicon steel sheet. Note that the epoxy resin can not be brushed into the groove. After the epoxy resin is cured, both sides of the core groove are polished, and the 80 diamond paper fixed on the wooden board is used from the bottom to the top. After grinding, the resistance value of the iron core to the stator base is measured, and the qualified value should be polished about 5 times for the small corpse. Remove all the dust and grinding particles from the stator with the clean high-pressure wind.
The self-adhesive tape is adhered to the inner core of the iron core and the upper and lower tooth pressure plates. 1235 semiconductor paint can only be sprayed on the bottom and sides of the core groove, and other parts should be cleaned if it is painted. After the 1235 semiconductor lacquer is cured, remove the self-adhesive tape and mark the slot number. It is very important to mark the slot number on the stator core of the paper, because it can prevent the builder from accidentally misplaced or misplace the temperature measurement and resistance KTD. For the grid. If the grooved bar passes too tightly, according to the paper requirements, first fix the iron core, insert 5 or 6 lower layer wires in the length of each end hoop, and pour the end hoop base plate. For the bracket end hoop, adjust the gap between the end of the bar and the end hoop to 512.5, and then install the end hoop. The secondary end hoop is placed against the inside of the branch.
Weld the end of the end hoop and wrap the insulation.
22.3.3, the 纟 line bar is embedded in the first inspection of the apricots, the number is old. It is necessary to sneak into semiconductors. It is required that the factory end and the iron core are flat on the grid, and the outer core of the iron core is not taken out. Push the wire to the slot. Use the label to find the bar. 6 Use the lower wire machine to smoothly pour the wire into the bottom of the groove, and check that the gap between the two sides of the bar and the groove does not exceed 0.13. After passing the pass, the wedge is fixed to the lower wire bar. The lower end is tied, first filled with polyester felt between the oblique sides of the bar between the lower line end hoops. Then, the glass fiber fiber immersed in the epoxy tree boat glue is used for binding. When the wire is fastened by the upper end ligating material, the temporary groove wedge can be removed. 2.
2 in the slot structure and the line in the slot fixed in the slot die 2 oblique 3 corrugated 14 pad 5 upper layer bar; 6 layer pad or generation, 22.3.4, 0 component mounting and upper wire bar embedded according to paper It is required to load the qualified temperature measurement 7RlUtSttriitftl50nmrtJ in the corresponding tank; the JI line into the hall is painted with the semiconductor paint in the step of embedding the layer bar to install the wire rod.
22.3.5 Installation of wedge wedges and wedges are phenolic glass fiber compression plastics, and the corrugated board is loaded with the front and rear bars of the purchased parts. Place the corrugated plate wedge. The length of the corrugated board should be greater than the length of the four wedges.
The joints that actually install the two sections of corrugated sheets must be staggered from the joints of the mats. It should be noted that the direction of the grooved venting groove should be all clockwise in a plan view, and flush with the inner circular surface of the iron core, and the iron core cannot be protruded.
The iron core cannot be grown at both ends, otherwise it will be processed. Then apply a layer on the contact surface between the oblique mold and the wedge wedge, 108 glue, and drive into the wedge. In order to prevent the wedge from swaying, the wedge at both ends of the core is applied to the contact of the grooved dovetail, 108 glue, and the groove wedge is adhered to the stator core.
After the wedge is installed, the small hand hammer is used to tap the slot mold to check the tightness of the blood. Except for the no-sound of the wedges at both ends, the other wedges allow for 25 long empty sounds. Since the structure adopts a corrugated board, it can also be used. The special tool provided by the company checks whether the compression amount of the corrugated plate at the stator core ventilation slot reaches 1.3, and the above requirements.
2.2.3.6 Stator Winding End Convergence Ring Welding Stator bar end and bus ring welding is also done by a brazing machine using a brazing machine.
In addition to the debugging of the brazing machine before welding, the upper and lower wire rods and the confluence ring joints are aligned with the shaping tools to meet the requirements of the company 0. Clean the contact surface of the welded parts with oxide layer and epoxy glue. After cleaning, wipe off with alcohol or acetone. At the same time, the insulating part is also covered with asbestos cloth to prevent the high heat generated by the welding from damaging the insulation. When welding, the welding efficiency is required to reach 70 or more. All the welds are filled with solder, no pores are formed, and the 90-degree corner should be in the shape of a natural crescent. When it is found that the insulating part of the welded part has burn carbonization, it must be scraped. And should avoid the quality of the welding is not qualified, and the number of re-welding more than 2 times.
3.7 The insulation treatment of the stator bar ends is designed according to the domestic. The insulation treatment of the lower end of the stator bar uses a double-twist ring, which is glued to the liquid glue. It is not necessary to open the filling hole in the insulating box, and it is necessary to block the leak at the lower end of the box. In actual operation, the effect is not ideal, 1 operation and location. More fatherly. In the insulation treatment of the upper end of the No. 2 machine, the 5936 component epoxy putty epoxy adhesive curing agent and 8 thixotropic materials provided by the company 0 were used. This potting material is putty-like after mixing and has high thixotropy and stagnation properties. During the construction, only a part of the epoxy putty insulating insulation box in the end of the rod and the insulating box should be applied to the end of the rod. Push in the insulation box to remove the excess epoxy putty that is squeezed out. 8 is cured at room temperature. This wire rod end insulation process contains materials worthy of analysis and research applications.
2.2.4 Electrical test According to the installation standard of China, the blood-throwing position should be measured under the voltage of the register after the embedded layer rod of the stator is embedded. = The power station of the beach power station is fixed. After the wire rod is embedded, the potential of the tank is not evaluated. Instead, the resistance value of the rod surface and the stator core at 5 points is measured at less than 5 000. The AC withstand voltage test of 47 was made by the wire rod embedded factory.
The test items after the stator windings are completely installed are as follows. a DC resistance measurement. In the current measurement of each branch, the current measurement to the 10 input is not greater than the minimum value of 2 to correct the error caused by the difference in the length of the corpse lead, and measure the insulation resistance and polarization index of the phase-to-ground winding. The company requires that the insulation resistance value of each phase be converted to 40, when 29.6 mountains, and the + evaluation absorption ratio, but the test polarization refers to the C AC-DC withstand voltage test. This test is basically the same as the requirements of China's standards, except that the DC withstand voltage test is carried out at 3.5 times the rated voltage.
d Use 250 to measure the resistance of the resistance thermometer.
During the start-up test run of the unit, the company specifically requested a one-flow withstand voltage test on the stator winding phase after the overspeed test to verify the stator winding in the overspeed test. The insulation sense is recognized. 1. During the test, the voltage is increased step by step according to 0.5 times of rated voltage. Each section stays 1. The phase winding has a relative error of 50 DC leakage current on the high voltage side of the test voltage, which meets the standard requirements.
3 Conclusion The structure of the generators of the Danshui Hydropower Station, the structure and installation characteristics of the generators, especially the stator part have many differences with the units designed and installed by China. For example, the positioning ribs are mostly completed in the factory, and only the positioning ribs at the joints of the construction site are welded. In this way, the quality of the positioning ribs can be strictly controlled, and the installation period of the construction site can be shortened.
In the stator core stacking process, compensating sheets are used to compensate for the uneven thickness of the punching sheets and the wave width generated by the stacking, and we usually use the punching strips on both sides of the rod. 70. Room temperature refinement of semiconductor silica gel for anti-halation treatment, the material has good elasticity and thermal conductivity to compensate the expansion of the wire rod due to the heat of operation of the unit. The stator bar end joint is insulated. The use of greasy epoxy resin makes the process simple and requires no plugging and no pollution. The inner fixing of the wire rod groove is effective for fixing the wire bar corrugated plate or the like by the elasticity generated by the compression. These structural materials and corresponding processes are worthy of our study and research.
Su Shuzhen, male, bachelor. Helper. Mainly engaged in large and medium-sized hydroelectric generating sets installation technology and commissioning work. Received date 20010525 connected to the 35th heart 46.9 river boundary 0.12 and 68.9 river 10.1 out, it is the comprehensive power generation capacity for the load shedding and unit performance and multiple power failures when saving people, Hui Wei, Fang Yi folder weird The northeast network adjustment can be carried out according to the actual situation of the power system, the switching of the control mode, the use of the control performance evaluation standard, and the evaluation before the interconnection. Standards, as conditions mature, gradually adjust to the team's new evaluation criteria 51052 =; is a project, a heterogeneous system 1 process. In order to achieve the desired effect of the special operation, only the controllable conditions of the generator set are not enough, and the refinery has done a lot of intensive work. In order to improve; adjust the quality, we study the characteristics of the generator, the load and transmission of the grid, and adjust the number of people on the basis of this to make it fit the actual situation of the grid.
Through the trial operation of the period, the automatic power generation control is entered into 0. The system plays an important role in maintaining the frequency of the northeast power grid and regulating the power of the Jiangjiaying line between the North China Power Grid and the labor intensity of the good operating personnel. When the load is flat, it basically replaces the dispatcher to adjust the tie line. When the load peaks, it can provide the dispatcher with the pre-set time, so that the dispatcher has more time to make manual adjustments. People 0. After the operation, the dispatching automation system of the Northeast Power Grid has taken an excessive step from the 500 to the 18 system.
It also prompts dispatchers to transform from simple experience to intelligent, and improves the modern operation level of the power grid.
4 Conclusions to introduce the successful application of the Northeast Network Tuning System before and after the cross-person 1 domain network in the northeast of Bibei, and now with the development of technology. Especially in combination with load dumping, the dispatching department makes reasonable arrangements for the power generation plan and maintenance plan of the unit within the network based on the load forecasting work, so that the point 1 power and daily load curve of the machine 1. Consistently, the units arranged in the grid, the heart-adjusted capacity is allowed to use the 0 function will play an increasingly important role in the joint network.
Hey, female, engineer. Mainly engaged in power grid dispatching automation,
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