KR100450283B1 - A overhaul method of a water turbine generator - Google Patents

Abstract

The present invention is installed in a water power plant (WATER POWER PLANT) to perform a more efficient and systematically when performing repairs for a certain period of time generators that generate electricity by using hydroelectric power (FRANCIS) generator breakdown inspection and repair The method is to disassemble the generator and aberrations sequentially, and after disassembling and inspecting each of the disassembled parts, assemble them in the reverse order, but set the fixed body in the correct position and assemble the rotating body. Can be carried out efficiently and accurately, and the time for overhaul and maintenance can be shortened, thereby maintaining the performance of the water turbine generator and extending its life.

Description

A OVERHAUL METHOD OF A WATER TURBINE GENERATOR}

The present invention relates to a method of repairing a water turbine generator for more efficiently and systematically when a water turbine generator installed in a water power plant (WATER POWER PLANT) to generate electricity by using hydraulic power for maintenance at regular intervals. A method for overhauling and repairing a FRANCIS aberration generator is provided.

To explain this in more detail, the Francis aberration generator has aberrations in which electric generators (GNERATER) and aberrations (HYDRAULIC TURBINE), a rotating machine that converts the potential energy of water into mechanical (rotary) energy, are installed on the same vertical line. Powered by the generator, the generator produces electricity.

The above-mentioned aberration (Francis aberration) generators are decomposed every 5 to 10 years in order to maintain the performance of the power generation equipment and its related equipment properly and to prevent the occurrence of various accidents in order to operate more safely and efficiently. The overhaul is carried out, and the overhaul of the aberration generator is generally performed by disassembling the generator and the aberration, performing a maintenance and disassembly inspection of the disassembled equipment, and assembling the repaired aberration and the generator. Will be implemented.

However, in the related art, in performing repair work on the aberration generator as described above, it was simply carried out only by a function of skill. Therefore, the repair period can be estimated by disassembling and assembling without setting the order according to the repair. There was a problem that required a lot of time and manpower, and it did not set clear standard according to the repair, so it was not possible to assemble the disassembled parts correctly in place when performing the assembly, and some parts were precise Due to the need for processing, many difficulties arise in the work, which results in a problem that the performance is weakened or the parts are easily broken and the maintenance is frequently performed, thus wasting time and money.

In particular, even after the maintenance was completed, the work was not performed precisely and the parts were not assembled correctly, so the main shaft, etc., was not installed vertically, so axial vibration occurred during operation, and vibration caused by aberration vibration, and hot run There were many problems, such as axial vibration.

When vibration occurs in the driven generator, the wear of the parts is severe, and thus, there is a problem in that the waste of equipment costs, such as a significant shortening of the life of the generator, need to be replaced early.

The present invention is to provide a method of repairing a water turbine generator that can solve the above problems.

An object of the present invention is to provide a method of repairing a generator for more efficiently and systematically when performing repairs at regular intervals, and in particular, to provide a method of repairing a Francis generator.

Another object of the present invention is to clearly set the standards and the order of disassembly and assembly according to the repair, to extend the life of the generator, and to reduce the time and cost of repair (FRANCIS) aberration The present invention provides a method for repairing a generator.

Another object of the present invention is to accurately assemble the disassembled parts in place to prevent the phenomenon that some parts can not be assembled to prevent the phenomenon of performance degradation or easily broken parts, time and cost of repair It is to provide a repair method of the FRANCIS water turbine generator, which can prevent the waste.

The above and other objects of the present invention,

In disassembling, inspecting and assembling the aberration generator, a preparation process (200-1) for inspecting, manipulating and separating various equipments and devices in order to disassemble the Francis aberration generator 1 more easily and efficiently, Generator disassembly process (200-2) for disassembling the base (2) and maintenance and repair of various components, and aberration disassembly process (200-3) for disassembling the aberration unit (3) sequentially and repairing and repairing the disassembled various components (200-3). And inspection of the disassembly device for inspecting and repairing the components and auxiliary devices of the generator part 2 and the aberration part 3 disassembled by the generator disassembling process 200-2 and the aberration disassembling process 200-3. Generator 239, an aberration assembly step 200-4 for assembling the parts of the dismantled and repaired aberration part 3 sequentially, and a generator for assembling the various parts of the disassembled and repaired power generation part 2 in order. The assembling process (200-5) and the assembled aberration generator (1) are finally And a check is accomplished by a repair process of the aberration generator characterized in that to carry out checks to test a variety of tests required for operation, and a test process (200-6) sequentially.

1 is a cross-sectional view showing the structure of the Francis aberration generator repaired by the present invention.

Figure 2a and Figure 2b is an enlarged cross-sectional view of the generator portion and the water turbine turbine portion of the Francis water turbine generator repaired by the present invention.

3a to 3h is a process diagram showing a method of repairing a water turbine generator according to the present invention.

Explanation of symbols on the main parts of the drawings

1. Francis Wheel Generator 2. Generator

3. Turbine turbine part 200. Disassembly inspection repair process

200-1. Preparation process 200-2. Generator decomposition process

200-3. Aberration Decomposition Process 200-4. Aberration Assembly Process

200-5. Generator Assembly Process 200-6. Inspection and test process

The above and other objects and features of the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

Figures 1 to 3h is an exemplary view showing a specific embodiment of the repair method of the aberration generator according to the present invention, Figure 1 is a cross-sectional view showing the structure of the Francis aberration generator to be inspected and repaired by the present invention, Figure 2a And FIG. 2B is an enlarged cross-sectional view of the generator unit and the water turbine turbine unit of the Francis water turbine generator illustrated in FIG. 1, and FIGS. 3A to 3H are process diagrams of a method of repairing a water turbine generator according to the present invention.

The overhaul of the generator is carried out regularly, and if it is carried out at a different time for each device, several times of power failure will be required, resulting in power generation loss due to a decrease in facility operation rate. Therefore, it is very effective and important to plan and implement the entire equipment inside the power plant for a certain period of time, and thus, to complete such OVERHAUL safely and efficiently in a shorter time, the aberration generator and the aberration generator are dismantled. Various equipments (equipment) such as overhead cranes for assembly should be thoroughly inspected, and a detailed plan should be thoroughly prepared in advance so that multiple processes of disassembly and inspection can be carried out without any problems.

Aberration generator disassembly inspection and repair process 200 according to the present invention, in order to disassemble the aberration generator after assembly, inspection, maintenance, check the various equipment and devices in order to more easily and efficiently disassemble the Francis aberration generator (1) And the preparation process 200-1 for operating and separating the generator, the generator disassembling process 200-2 for disassembling the generator unit 2 and maintaining and repairing various components, and the aberration unit 3 in order. And aberration disassembly process (200-3) for repairing and repairing various disassembled parts, aberration assembly process (200-4) for assembling parts of disassembled and repaired aberration parts (3) in order, and disassembly repair Generator assembly step (200-5) for sequentially assembling the various parts of the generated power generation unit (2) in reverse order, and inspection and test process for finally inspecting the assembled water wheel generator (1) and testing various tests required for operation Sequential (200-6) Will be performed.

As illustrated in FIG. 3A, the preparatory process 200-1 includes a pre-disassembly operation state checking process 201, an internal tank gate closing process 202, and a draft tube gate closing process ( 203), an oil / coolant / drain valve operation step 204, and an in-flight wiring separation operation step 205.

The operation state checking process 201 before disassembly checks the AUTO START & STOP state and the OUT PUT state and the like (TEST).

After completion of the operation state inspection before disassembly (201), the main dam field operation panel communicates wirelessly with the switchboard and operates it manually to perform the INTAKE GATE closing process 202, but in this case, the bypass valve ( BY-PASS VALVE) and GATE RUBBER SRAL status must be clearly checked, and the gate of the waterproof path is normally caught by the stopper, so use the GANTRY CRANE to open the gate. Move (GATE) to check the pressure of SPIRAL CASING and then close (CLOSER) and operate various devices while checking TAG.

After performing the INTAKE GATE closing process 202, the PENSTOCK, SPIRAL CASING, and DRAFT TUBE of the DRAFT TUBE GATE closing process 203 is performed to collect the water filled in the drainage PIT to operate the drainage pump.

In particular, when draining the water inside the PENSTOCK, the water inlet is closed and the PENSTOCK DRAIN VALVE connected to the waterproof opening is opened to open the water level of the PENSTOCK equal to the level of the waterproof path. The drainage pump is operated and drained. When the pump is operated and drained, the drainage pump is completely drained while monitoring the drainage situation so that the drainage PIT is not flooded due to abnormalities of the pump and the valve.

In addition, the casing and draft tube manholes are opened (CASING & DRAFT TUBE MANHOLE OPEN), and the guide vane gap and the runner gap are fully opened and closed. Check it.

After the draft tube gate closing step 203 is performed, each part oil / coolant / drain valve operation step 204 and in-flight wiring separation operation step 205 are performed.

When carrying out the in-flight wiring disconnection process 205, pay careful attention not to damage the cable, attach markings and number tags to the separated wires, store them with taping, and complete the work. When wiring afterwards, perform a sequence test to prevent malfunction during operation. In particular, prepare a sack or basket before disassembly and store the disassembled bolts / nuts and washers after marking to avoid mixing or losing them, and clean them to prevent foreign substances from entering the pipe before disassembling. After wrapping, wrap the vinyl or rags and store it with taping.

After completing the preparation process as described above, the generator decomposition step (200-2) to sequentially disassemble the generator unit (2: GENERATOR) in the following order, and the generator decomposition step (200-2) Silver PMG decomposition extraction process (206), COLLECTOR RING COVER decomposition process (207), TOP COVER decomposition process (208), STUB SHAFT and BUS BAR connecting bolt STUB SHAFT take-out step 209, UP BRACKET decomposition take-out step 211, UPC coil cover take-out step, rotor decomposition take-out step 212) LOWER OIL GUIDE Explode Extraction Process (213), Generator Guide Bearing (GEN, GUIDE BEARING) Extraction Process (214), Generator Shaft (GEN, SHARFT) Extraction Settlement Process (215), Traverse Bearing ( Draw-Bearing Settlement Process (216), Lower Bracket Disassembly Draw-Out Settlement Process (217), Lower Air Deflector Emitter (LOWER AIR DEFLECTOR) subjected to decomposition withdrawal process 218 in sequential order.

The PMG decomposition drawing process 206 disassembles the cover 11 by disassembling the eight bolts of the cover 11 provided with the signal lamp 10, and removes the lead wire and the PMG lead wire of the signal lamp 10. After measuring the insulation state of permanent magnet alternator with 500V, 1000MEGGER insulation resistor, PMG (12: PERMANENT MAGNET GENERATOR) consisting of rotor (13) and PMG stator (14) using a crane (5 tons) Detection generator) for detection and withdrawal.

COLLECTOR RING COVER Disassembly process (207) is to disassemble generator carbon brushes (36), pack them in small size, dry them, store them in a safe place, and store DC bus bar and dust collector Disassemble the eight bolts of the COLLECTOR RING JOINT, remove the support of the jack up limit switch and the cables for pilot bus (PB1, PB2), and the dust collector ring Disassemble the fixing bolts (24 pieces) of the cover (COLLECTOR RING COVER), and in particular, the crane (5 tons) protected with a gasket sheet (GASKET SHEET) to prevent damage to the collector ring face. ), Slowly raise (UP) while surrounding and settle.

The top cover disassembly process (208) disassembles the top cover (20: TOP COVER) after marking the top cover joint (TOP COVER JOINT). The cover support fixing bolt 16 is disassembled, and the top cover (8 pieces) is taken out and placed using a crane, and then the top cover supports (8) are removed.

STUB SHAFT and BUS BAR connection bolt separation process and STUB SHAFT take-out process 209 are performed as follows.

Disassemble the PMG ball joint coupling, remove the insulation tape of the bus bar joint, remove the fixing bolt, and remove the bolts of the brush support copper plate and the collector ring connection. Then, remove the bus bar connecting the stub shaft and the rotor 24 with a gas torch and remove it, but check the level of the stub shaft before removing the bus bar. Remove the support. Disassemble the stub shaft and the generator main shaft coupling bolt, and slowly pull out the stub shaft using a crane to settle it, but change the position of the wire rope.COLLECTOR RING FACE), be careful not to damage.

The upper bracket disassembly and withdrawal step 211, which disassembles and pulls out the upper bracket 22, measures the level LEVEL before disassembly, and fastens the upper bracket 22 to the stator frame. After disassembling one foundation bolt and dowel pin, take out and place upper bracket 22 including upper coil cover. Install it.

The rotor disassembly takeout stabilization step 212 for disassembling and drawing out the rotor 24 of the generator is performed as follows.

Before disassembling the rotor 24, measure the air gap (D1: AIR GAP) between the rotor 24 and the stator 30 (STATOR) and the gap between the rotor 24 and the brake (Brake) and stop the rotor fixing bolt stopper. After dismantling by grinding the weld, remove the fixing bolt, but disassemble it while checking the pressure by using a hydraulic oil pump (HYDRAULIC OIL PUMP).

After installing and cleaning the device (DEVICE) which can take out the rotor 24, apply grease to the surface of the base to prevent rust from occurring, and quickly settle the rotor 24. Arrange the RIM SUPPORT and JACK at regular intervals to support it.

Since the gap D1 between the rotor 24 and the stator 30 is about 14 mm, the rotor pole, the stator core 35 and the coil may be damaged when the rotor 24 is taken out. In order to prevent (DAMAGE), the personnel should be placed at intervals of 1 ~ 2m, and the wooden boards should be sufficiently prepared (16 ~ 20), and the wooden boards may be pulled out by shaking the wooden boards up, down, left, and right when pulling out the rotor 24. Draw out while protecting the 24 and the stator 30 from contact, but each time the rotor 24 is taken out sequentially (1 to 2 times), the level (LEVEL) is repeatedly checked and adjusted while the crane is stopped. After drawing out the rotor 24 completely, the support SUPPORT is installed while the fiber sheet is developed on the rotor mounting base.

Disassemble the hook of the crane, apply grease to prevent rust on the projecting part of the contact surface (COUPLING surface, ROTOR SPOKE surface) for storage until disassembly and assembly, and foreign matter penetrates into the rotor RIM. To prevent moisture from occurring, cover it with a small window and install the inspection ladder so that the lower bracket (45: LOWER BRACKET) can be inspected after the rotor 24 is taken out. (30) is covered in small windows so as to prevent foreign matter from penetrating or generating moisture.

The lower oil guide (LOWER OIL GUIDE) decomposition drawing-out process 213 which disassembles and draws out the lower oil guide 43 is performed as follows.

The oil filled in the thrust bearing tank 44 is connected to the auxiliary tank provided at the rear end of the tank drain valve and the hose, and then the pump is operated to drain and the thrust bearing (49: THRUST BEARING). Oil remaining in the oil piping of the pipe) is opened by opening the drain valve installed in the pipeline and removing and draining the pipe flange. Remove manholes and thrust bearing RTDs and thermometers, and pack and store them in small size. Remove generator conduits and wirings, cut and remove conduit support, and drained oil is filtered using an oil filter.

TRUST RUNNER (40: THRUST RUNNER) checks the level (LEVEL) before disassembling and draws together when pulling out the generator shaft (GEN 'SHAFT) and then wraps it in a small window to prevent foreign matter from penetrating.

THRUST OIL COVER measures LABYRINTH GAP before disassembling it, removes the lower guide bearing RTD and thermometer and packs it in small size, and removes air supply and exhaust pipe. Loosen and remove the seizure cover fixing bolts, and then disassemble and install the thrust oil cover (41: THRUST OIL COVER).

Generator guide bearing (GEN, GUIDE BEARING) take-out process (214) is dismantled and dismantled the fixing bolts for fixing the cover of the generator guide bearing 42, and before disassembling the generator guide bearing 42, the guide bearing adjustment bolt (GUIDE) Measure the guide bearing gap between bearing bearing and bearing with a gap gauge, and after dismantling the adjusting bolt locking nut supporting the generator guide bearing 42, A separate eyebolt is drawn out on the top of each of the sixteen generator guide bearings 42.

After pulling out the generator guide bearing 42, the main coupling bolt 51 should be removed, and the process for removing the generator guide bearing 42 is performed in the following order.

Inside the turbine pit, the scaffold is securely installed at the appropriate height so that the main coupling bolt 51 can be easily disassembled and the work can be carried out easily. Place the plywood on it and fix it so that it does not come off.

Disassemble and disassemble the fixed bolt of the lower air deflector on the shaft side, and fasten the eye bolt to the lower oil tube fixing bolt hole. BLOCK) is installed on the left and right sides, supports the WOODEN BLOCK between the coupling and the cover, and lifts up after disassembling the fixing bolt of the upper cover by using the already installed chain block. , Remove the bolt fastened inside the cover and divide it out. After measuring the length of the coupling fixing bolt, disassemble the lower cover fixing bolt and put it on the top of the supporting neck.

For the bearings manufactured separately between the runner and the bottom ring and the wear ring to prevent the damaging when the shaft and the runner are moved and moved down. The taper carter supports a number of places, and the folded part of the coupling bolt washer is unfolded.

Install the tool to separate the coupling bolt and nut, and measure the disassembly pressure by using the hydraulic pump, and adjust the 12 coupling bolts / nuts in diagonal order in consideration of the influence by the main shaft and other devices. After disassembling sequentially, after tightening the eye bolts to each coupling bolt, the coupling bolts (12 pieces) are taken out, and the remaining coupling bolts (4 pieces) which are diagonal to each other are impacted by the runner blades ( DAMAGE) As a preventer bolt, the load of the RUNNER acts, so to reduce the load on the coupling bolt and to prevent the swing or deformation of the main shaft, four withdrawal bolts with a square plate 4, 5, Tighten to holes 12 and 13.

Install the jack lam in the center of the plate and fix it by applying pressure (600kg / km), but be careful not to move the jack pump hose until the work is completed. Disassemble the two coupling bolts / nuts, take out the coupling bolts using a chain block, and remove the coupling bolts and screws (8).

Since the jaw of the main shaft, which is the connection part between the turbine shaft and the generator shaft (50: GEN 'SHAFT), is about 12mm, slowly drain the oil from the jack pump that is connected. MOVING-DOWN so that the gap between RUN and TURBIN SHAFT is 13 ~ 14mm, remove 4 spare bolts for removing, plate and jack ram After disassembling the coupling bolts, measure the length of the bolts. After dismantling the coupling bolts and dismantling and dismantling of the equipment on the generator side, remove the scaffold installed in the turbine fittings.

The generator shaft 50: GEN 'SHAFT drawout settling step 215 for drawing out the generator shaft 50: GEN'SHAFT is carried out as follows.

Disassemble the fixing bolts of the thrust bearing (49) and the lower oil tube base, and evenly distribute the support neck on the top of the generator shaft flange (GEN 'SHAFT PLANGE) to prevent it from falling, and The RTD and the thermometer of the bearing 49 are dismantled and packaged and stored in small windows, and the lifting device (LIFTING DEVICE) is fastened to the top of the generator shaft (GEN 'SHAFT) and hanged on the crane using a wire rope.

When pulling out the generator shaft, the gap between the outer diameter of the lower oil tube base and the outer diameter of the shaft is 20 mm and is drawn out with the various components installed inside the thrust bearing tank. And take out gradually while keeping the level, and after the withdrawal, transport it to the designated place and place the various parts provided inside the thrust bearing tank on the top of the prepared pedestal, but place the generator shaft (GEN 'SHAFT) to prevent the flange hole from moving. 4 bolts are held at equal intervals, and the generator shaft is completely settled, and then rust-treated with oil and wrapped with wood.

THRUST BEARING withdrawal settling process (216), which disassembles and removes a bearing bearing (40: THBEARING), dismantles and removes the bearing stopper key bolt, and the thrust bearing pad (49-1) Take care not to damage the (12) faces, take them out with a crane, set them up, and then wrap them in a small window to protect them.

The lower bracket decomposition drawing-out settling step 217, which draws out the lower bracket 45 (LOWER BRACKET), is carried out as follows.

Check level (LEVEL) before disassembly. FOUNDATION BOLT to completely separate the oil cooler pipe 47 and other wiring through the oil cooler, disassemble the lower air deflector 48 and the support bolt fixed to the lower bracket 45, and fix the bracket frame. ) Remove the fixing bolt that joins the middle part of the dowel pin and the lower coil cover.

Pull out the lower bracket 45 (including the lower coil cover) slowly with a crane, but withdraw the gap while keeping the left and right gaps appropriately so as not to damage the stator 30 of the generator. After applying the grease for prevention, place the support neck in an evenly arranged condition, check the dimension of the liner of the lower bracket 45, mark it so that its position does not change, and then carry out the crushing work. keep it.

The lower air deflector disassembly and take-off process 218, which disassembles and draws out the lower air deflector 48, disassembles the bolts (3 places) and the fixing bolts of the lower air deflector joint, and removes the lower air deflector. In order to prevent bending in 48, wires are hooked to the crane and drawn out one by one while maintaining the level.

By doing in this way, the generator decomposition process 200-2 of the generator part 2 is completed.

The aberration disassembly process 200-3, which sequentially disassembles the aberration turbine unit 3 and repairs and disassembles the various parts, disassembles the turbine fit walkway and the grease line separation process 220. , SHEAR PIN and GUIDE VANE LEVER PIN disassembly process (221), GUIDE VANE CAP, GUIDE VANE AMY KEY disassembly process (222), guide van thrust bearing (GUIDE VANE THRUST BRG ') Disassembly process (223), Guide bearing cover (GUIDE BEARING COVER) Disassembly process (224), Bearing cover support (BEARING COVER SUPPORT) Disassembly process (225), Turbine guide bearing oil cooler (TURBIN) GUIDE BRG 'OIL COOLER) Disassembly and Extraction Process (226), Packing and Packing Box Disassembly and Extraction Process (227), Coupling Bolt Cover Disassembly Process (228), Main Coupling Bolt (MAIN COUPLING BOLT) Disassembly (229), Guide Van Lever (GUIDE VANE LEVER) Extraction (230), Guide Vanstem Housing (GUIDE VANE STEM H) OUSING) drawing process (231), guiding ring drawing process (232), head cover (HEAD COVER) disassembly drawing process (233), guide vane servo motor (GUIDE VANE SERVO MOTER) drawing out process (234), Guide vane withdrawal settling process (235), bottom ring withdrawal settling process (236), runner and shaft (RUNNER & SHAFT) separation settling process (237), turbine shaft (TURBIN SHAFT) separation settling process (238), the decomposition apparatus inspection step (239) is performed in this order.

In order to perform the aberration decomposition process (200-3), the manhole of the spiral casing (100: SPIRAL CASING) and the manhole of the draft tube (101: DRAFT TUBE) must be honked.

After completion of the cabin drainage, disassemble the two fixing bolts that hold the spiral casing manhole with a spanner, remove the fixing plate, and push the spiral casing manhole by hand to casing. Open to the inside of the door and install a ladder to safely enter and exit the casing after opening the manhole.

DRAFT TUBE MANHOLE Fixing bolts are disassembled using impact wrench and spanner, and the draft tube manhole is opened and scaffolding is installed using lumber, scaffolding, and plywood. Pay attention to safety such as slipping by wearing it.In order to check the sealing state of the waterway by waterproofing the inside of the draft tube, a ladder is installed at the entrance of the manhole in case of emergency and flooded on the footboard of the draft tube. It is preferable to install a prohibition sign board so that a plurality of people (three or more) can be prevented from entering and leaving as much as possible.

In addition, the gap GAP of the guide van 140 (GUIDE VANE) and the runner GRUNN are measured.

The operator enters the spiral casing manhole while the guide van 140 is completely closed, and between the guide van 140 and the head cover of the upper part and the bottom ring 144 of the lower part. Measuring the gap (GAP), measuring the gap (GAP) between the bottom ring (144: BOTTOM RING) and the gap between the guide van 140, and measure and record the servo motor stroke (SERVOR MOTOR STROKE) Then, the distance between the runner 110 and the head cover 143 of the wear ring (WEARING), the bottom ring 144 (BOTTOM RING), the bottom ring wear ring (BOTTOM RING WEARING RING) is measured.

In order to measure the distance between the guide van gap and the guide van 140, the guide van 140 is fully opened in the following manner.

First, operate the oil pump manual (OPERATING), switch the turbine control switch from AUTO to MANUAL, and spring the paper (PAPER) so that the upward force is applied to the converter upper spring. Insert it into (SPRING), then operate solenoid valves manually (20WC: CLOSE OPEN, 65S: SHUT RELEASE, 74LS: SHUT RELEASE), and manually operate the ROAD LIMITER KNOB to guide slowly. Opening the van 140, the monitor is placed on the turbine feet (TURBINE PIT) to open (FULL OPEN).

Subsequently, the gap between the guide vans 140 is measured while the guide van 140 is fully open, and after completion of the measurement, slowly using the ROAD LIMITER KNOB while the worker is withdrawn. Close the guide van 140, close the main valve of the oil presser tank (CLOSE), and turn off the oil presser pump power from the manual in the MCC panel.

In particular, the gap between the runner 110 and the bottom ring wear ring (BOTTOM RING WEARING) is measured after installing the scaffold in the draft tube (DRAFT TUBE) to measure, the guide van (140) in the state that the guide van (full open) When measuring the distance between the 140 and the worker enters between the guide vans 140 to perform the work by inserting a stopper on top of the distribution valve (DISTRIBUTING VALVE) DISTRIBUTING VALVE Should not be closed by the stopper even if it receives a closing signal.

Turbine fit walkway 106 and grease line separation process 220 are carried out as follows.

Disassemble and dismantle the fixed rails of HANDAIL, RADDER, and WALKWAY (106: WALKWAY SUPPORT) and OUTDOOR WALL installed inside the turbine pit 101. Remove the foot of OUTSIDE WALKWAY and dismantle the fixing bolt of INSIDE WALKWAY.

Then, the grease line of copper pipe, flexible hose and carbon steel pipe was removed, and the distribution valve and swivel connector were removed. ) And general connectors are removed, and the check valve and runner air supply pipe line and the cooling water pipeline of the stuffing box are removed, and the runner crown and sealing water are removed. Remove the copper pipe for pressure measurement.

The SHEAR PIN and GUIDE VANE LEVER PIN disassembly process 221 and the GUIDE VANE CAP and GUIDE VANE AMY KEY disassembly process 222 are performed.

GUIDE VANE THRUST BRG 'disassembly process (223), guide bearing cover (GUIDE BEARING COVER) disassembly process (224) and bearing cover support (BEARING COVER SUPPORT) The process 225 and the TURBIN GUIDE BRG 'OIL COOLER decomposition take-out process 226 are performed as follows.

A tank oil of the turbine guide bearing 120 is drained using a conventional oil filter, and an oil level switch, an oil level switch and sight gauge, an oil contamination detector, and a vibration detector are provided. Dismantle and dismantle, disassemble the joints and fixing bolts to couple the guide bearing cover 122.

Measure the guide bearing gap (GUIDE BEARING GAP). Then, hang the wire rope firmly on the top flange of the turbine shaft to hook the chain block, and withdraw the guide bearing cover 122 using the chain block, but withdraw the guide bearing. The bearing cover support (121: BEARING COVER SUPPORT) side is placed and placed so as not to cause any troubles. The turbine guide bearing (RTD) and the thermometer are removed, and the packaging is kept straight and separated from the wiring.

Disassemble the fixed bolt of the turbine guide bearing 120, and slowly raise it up with a chain block to disassemble and withdraw the bearing joint bolt, but before disassembling the turbine guide bearing support level (TURBINE GUIDE BEARING SUPPORT) LEVEL).

Remove the oil remaining in the turbine guide bearing tank and remove the cooling coil by disassembling the fixing bolt of the guide bearing cooling coil flange (2 sets). Remove the fixing bolt of the guiding bearing oil basin and disassemble and take out the oil basin.

The packing and packing box disassembling and extraction process (227) for disassembling and pulling out the stuffing box is performed as follows: First, the shaft sleeve and the packing box are as follows. Check the gap between them in several places, take out the packing box cover, coil spring and packing holder, and take it out so as not to damage the carbon packing. Withdraw with care and take out the packing box on the upper side, disassemble the coil spring, packing holder and carbon packing, and lower packing box. In addition, coil springs, packing holders and packing cartons are taken out, and packing box supports are disassembled and taken out.

A guide that disassembles and removes the guide ring 130 and the guide mechanism after performing the coupling bolt cover disassembly process (228) and the main coupling bolt disassembly process (229). The ring takeout process 232 is performed as follows.

Remove all grease lines installed in the guide ring 130 and the guide van 140, and remove the two stoppers by cutting the welding part of the road pin stopper. The two rod pins of the connecting rod connecting to the servo motor are disassembled and drawn out using the hydraulic operation key.

After disassembling and taking out the shear pins (20 SHEAR PIN) and the eccentric link pins (ECCENTRIC RINK PIN: 20) of the guide vane link (GUIDE VANE LINK) connecting the guide ring 130 and the guide van 140, Take out the GUIDE VANE LINK, disassemble the guide ring holder (20 pieces), remove the holder (HOLDER), and remove the guide ring (130) when the scaffold in the turbine pit 101 is removed. Pull out with a crane, and clean the grease (GREASE) of the friction portion of the guide ring 130 and the head cover (143: HEAD COVER).

Guide van lever (GUIDE VANE LEVER) withdrawal process (230) and guide vane steam housing (GUIDE VANE STEM HOUSING) withdrawal process (231) and guide van (GUIDE VANE) The drawout settling step 235 is performed as follows.

Open the oil drain valve (OPEN) before the operation to completely drain the oil, then disassemble the OPEN / CLOSE pipeline (PIPE LINE) of the guide vane servo motor, and guide van servomotor oil. Dismantle the fixing bolts of the pipeline flange (GUIDE SERVOMOTOR PIPE LINE FLANGE) and dismantle the pipe, but before disassembling the fixing bolts of the GUIDE VANE SERVOMOTOR, the chain block (CHAIN) 2) hooks, hooks on the body of the servomotor, wire ropes on the cranes, the servomotors are bundled with the main body, and the fixing bolts of the guide vane servo motors are disassembled. Pull out the chain block to grasp the center of gravity, and slowly lower the guide block and pull out the servo motor until it is completely discharged horizontally. It gives up.

In the head cover disassembly and withdrawal process 233 for disassembling and drawing the head cover 143, the head cover fixing pin is disassembled and the head cover fixing bolt is displaced using a blow wrench. After disassembling, while holding the four wire ropes evenly on the crane and leveling the crane, the crane is operated to take out the head cover (143: HEAD COVER) slowly while being careful not to lift the guide van 140. When taking out the cover (143: HEAD COVER), be careful that the gap between the aberration chamber wall is narrow and be careful not to contact or collide with the accessory equipment installed on the wall.After placing the head cover (143: HEAD COVER) Disassemble the guide van U-type packing.

The bottom ring 144 drawout step 236 measures the level LEVEL before disassembly, disassembles the fixing bolts and the dowel pins of the bottom ring 144, and pulls out the device for taking out the crane ( DEVICE), the bottom ring 144 (BOTTOM RING) is taken out and placed in place, and then the withdrawal device (DEVICE) is removed.

The runner and shaft separation and settling process 237 and the turbine shaft separation and settling process 238, which disassemble and run the runner 110 and the turbine shaft 160, are as follows. Do as follows.

Before lifting the scaffold in the turbine pit 101, assemble the lifting device at the upper end of the turbine shaft coupling, insert the hook of the crane into the lifting device, and then join it. The tightening bolt (JOINTING BOLT) is fastened, and before the runner 110 is drawn out, the personnel are placed in the bottoming base at intervals of 2 m, and the asbestos gasket is attached to the runner 110 and the bottom ring wear ring. After sandwiching between the gaskets up, down, left and right, carefully runner 110 and turbine shaft 160 withdrawal and pay attention not to bias the runner 110 to one side, and after settling the top of the runner 110 A ladder is installed on the crane to disengage the hook of the crane fastened to the lifting device.

By performing in this way, the aberration decomposition process 200-3 which disassembles the aberration turbine part 3 sequentially and maintains and repairs the various parts which were disassembled is completed.

The components and auxiliary equipments of the generator unit 2 and the aberration turbine unit 3 decomposed by the generator decomposition process 200-2 and the aberration decomposition process 200-3 perform a decomposition apparatus inspection process 239. Repair is performed.

The inspection and maintenance of auxiliary equipment is carried out as follows.

First, the centering of the stationary body is performed. Centering work is carried out to make the gap between the rotating part and the fixing part accurate and even.The measuring line, like the piano wire, is lowered and fixed to the center of the generator, and the dimension between the piano wire and each fixed part is inside the micrometer. Measured by (INSIDE MICROMETER), etc.The tools required for centering measurement include piano wire (PIANO WIRE: 0.3mm, 20M), centering device (CENTERING DEVICE: 1SET), inside micrometer (INSIDE MICROMETER: 1 / 100mm, 2 SET), DIAL GAUGE: (1 / 5mm, 1 / 100mm, including MARNETNET BASE), Headphones (HEAD PHONE: 1), Battery (4FM 6V, 1), Weight (WEIGHT: 15Kg 1), Precision Square level (1 / 100mm, 1 piece), vinyl cord wire (25m), oily magic (2 pieces), oil container (1 piece), oil (oil uses less viscous: 20L), A tool is required.

The following items should be checked and prepared for measuring the centering.

PIANO WIRE must be free of seams or kinks. WEIGHT must be completely immersed in oil, and 4 wings are attached to WEIGHT to prevent the PIANO WIRE from flowing, which increases resistance and connects to CENTERING DEVICE. Do not allow foreign substances to enter or penetrate the oil, but install the WEIGHT so that it floats about 1/3 of the bottom of the sump, rather than directly touching the bottom of the sump.

Install DEVICE FRAME on top of UPPER BRACKET, connect "+" side of battery to CENTERING DEVICE and "-" side UPPER BRACKET for earth Connect the headphones with the headphone. Install a dial gauge in the center detector, and measure the four diagonal points of the upper bracket with the inside micrometer to approach the "o" point. Adjust it with the adjusting bolt of and fix it, and check the horizontal state of each part to be measured.

Distribute the circumference into quarters (or eighths, if necessary), mark them on the dividing line so that they can be accurately repeated at the same point, and keep the orientation of the dividing lines unchanged and keep the centers on all the circumferences. Marking should be done in the same order in order to hold CENTER, but when measuring a series of measuring points, the same person must carry out a personal error (3 out of 4 measuring points are carried out by person A and the other point is Error caused by person B) should be minimized.

The distance between the measuring point and the piano wire is measured by the inside micrometer (INSIDE MICROMETER). At this time, a headphone is used to check whether the micrometer is in contact with the piano wire.

Parts that are easily deformed into elliptical shapes, such as BOTTOM RING, should be measured after dividing the circumference into 8 parts in order to minimize errors due to ellipses, and whether the surface of the measuring part is smooth during centering. When performing other work due to temperature change on the day, the piano wire vibrates and measurement error occurs. Therefore, make the measurement in the morning, afternoon or night with the smallest temperature change as much as possible. It is preferably carried out in a stopped state and preferably carried out by an experienced person.

Judgment and adjustment by centering shall be carried out as follows.

Plot the value measured by the inside micrometer to SECTION PAPER to draw a gentle curve. By plotting it to SECTION PAPER, the measurement error and INNER surface It is not only to prevent the error caused by the irregularity of the measured value due to the poor finish quality of, but also to easily know which position is the best at the center. Just move / 2.

In the case of an ellipse, a bimodal curve is not obtained and becomes an irregular curve, but if only half of the ruler of the maximum and minimum values of the curve is moved, it becomes close to the bimodal curve. It is possible to calculate the center by obtaining the normal upper curve, especially when it is necessary to move and adjust each part with the jack and jack bolt. If you do not do this, the fixture is heavy, so that the whole does not move and the part pressed down by the jack (JACK) may occur, so be careful.

The centering procedure is carried out as follows.

Head cover (HEAD COVER) and upper and lower brackets (UPPER.LOWER BRACKET) are assembled and placed, the centering device (CENTERING DEVICE) is installed, the PIANO WIRE SUSPENSION is selected, but the turbine guide bearing Adjust the PIANO WIRE SUSPENSION so that the deviation of the measured value from the symmetry point of the TURBINE GUIDE BEARING HOUSING is less than 3/100 mm, and at this time, consider the relationship with the bottom ring to check whether the tolerance is allowed. do.

Then, the level (LEVEL) and the distance of each part are measured. Measure upper bracket level and distance, measure upper and lower distances of generator stator, lower bracket level, generator guide bearing support and GEN 'GUIDE BEARING SUPPORT Measure the distance between TURBIN GUIDE BEARING SUPPORT LEVEL and the distance between BOTTOM RING and WEARING RING.

Adjust the parts. Float each adjustment data (DATA) on section paper to check eccentricity and direction, compare installation and final inspection data (DATA), and fix bolts and tapers when eccentricity and movement amount are determined. Pull out the TAPER PIN and move it to the jack.

Each member is measured. When the adjustment is completed, precisely measure the level and distance of each part to check whether it is within the allowable value, dow pin processing and pin hole reaming, and if the reaming work is difficult because of too large adjustment range, bolt hole (bolt) HOLE) and PIN HOLE should be drilled in different locations. In this case, make sure that the test is carried out sufficiently.

After inserting the processed DOWEL PIN and tightening the fixing bolts, the inspection is finally carried out, and the centering procedure is completed by disassembling and taking out the parts in the reverse order of assembly.

After completing the centering operation, the maintenance of the wear ring of the bottom ring 144 is performed. The wear amount of the bottom ring ring is checked and the touch part is touched. After dividing into 80, measure the deflection by measuring the micrometer from the piano wire, and grind the part in contact with the rotating body to reduce the roundness variation of the bearing ring so that it is close to the source.

Inspect and repair the air cooler and its peripheral equipment as follows.

Open the air cooler drain valve (OPEN) to drain it completely, disassemble the fastening bolt of cooling water INLET and OUTLET FLANGE (65A), and remove the flange that is in close contact. Remove the pipe for the AIR VENT. Remove the air cooler drain flange, wire wire to the lifting lug on the top of the air cooler, pull it out with a crane, lay it on the side, and place it in the water box. Dismantle the cover by disassembling the fixing bolt of WATER BOX COVER and dismantle by removing the fixing bolt of the lower water box. Clean the inside of the lower water box.

After removing the fan inside the cooling tube hole and cleaning it cleanly, check the condition of each part visually, and paint the inside of the upper water box, the cover and the lower water box with epoxy paint, and air AIR COOLER GASKET is made of rubber to replace the gasket of the lower water box, assemble the water box, replace the gasket of the water box cover, and assemble the cover.

AIR COOLER removes dust, etc. using an external air, assembles an AIR COOLER hydraulic test device and performs tests, assembles an AIR COOLER using a crane, and COOLING Replace the gaskets of WATER INLET and OUTLET FLANGE and tighten the flanges, assemble the air vent life, and replace the gaskets of the AIR COOLER coolant drain flange before tightening the flanges.

Inspect and repair the generator brake and its peripherals as follows.

Disassemble the shoe by removing the brake shoes fixing springs (4), disassemble the fixing bolt of the piston cover for the air, and remove the cover. Disassemble and withdraw the piston while avoiding damage to the O-ring, and disassemble the piston for air.

Clean the oil inside the cylinder, clean the disassembled parts with cleaning oil, check the O-ring and bolts and parts, check the thickness of the brake shoe and replace it if worn over 15mm If the surface of the shoe is damaged due to scratches or damage, replace it regardless of the degree of wear.

Assemble the piston for air and the piston for oil, assemble the piston cover for air, assemble the brake shoe, fasten the fixed spring, and when the final inspection is completed after assembling the water turbine generator, Perform an operation test by supplying air and oil.

Disassembly and inspection of the oil cooler for the thrust bearing (49) and its peripherals shall be carried out as follows.

Install steel plate scaffolding to disassemble the water box, open the oil cooler drain valve (15A) to drain it completely, disassemble the fixing bolt of the water box and remove the cover Disassemble the bolt for fixing the CLEANING COVER at the bottom of the oil cooler and remove the cover.

Check the condition of the cooling tube and shell, remove and clean the inside of the cooling tube hole to clean it, clean the inside of the water box, assemble the cover of the water box and Remove the scaffolding, assemble the WATER BOX CLEANING COVER and apply the combination paint on the assembled cover.

GOVERNOR disassembles the oil filter in the GOVERNOR CUBICLE with a hexagon wrench, cleans and assembles the oil filter with a cleaning agent, and checks the operation status of each restoration mechanism.

For disassembly and inspection of the coolant filter, remove the main filter and remove the main filter, clean it with a wire brush and water, and remove the sealing water filter (STRAINER: 2 units). Clean with brush and water, and assemble after painting with epoxy paint to prevent corrosion of the body before assembling the STRAINER. After completing the assembly, the outside of the STRAINER is painted with a combination paint ( Blue).

Disassembly and inspection of the oil press tank opens the pressure tank drain valve and drains all the oil into the pump tank, and the manhole of the pressure tank is connected to the chain block. In the state of hanging, the fixing bolts of the manhole are disassembled and opened, and the inside of the tank is cleaned by using rags and small bowels, and the manhole packing is replaced and then closed.

Disassembly and inspection of the sump tank is carried out by transferring the oil from the "A" tank to the "B" tank using an oil filter, dismantling the cover by disassembling the fixing bolt of the sump tank cover, and return oil filter ( Take out return oil and magnet filter and wash oil and foreign substances cleanly by using gasoline or cleaning agent and dry them, and clean inside of tank, but after cleaning the inside of tank 'A', Assemble the filter and return oil filter, fasten the cover, filter the oil from tank "B" to tank "A" using oil filter, clean the tank "B" and clean the tank. After that, check and adjust the oil level gauge of the dial type.

Disassembly and inspection of the main breaker shall be carried out as follows.

Open the air tank drain valve slowly to open the air, drain the air, separate the SUPISTOR RESISTANCE, and disassemble the nut. When disassembling the SILENCER-COOLER and the brake part coupling nut, Since pressure is working, one person presses the SILENCER-COOLER and finally disassembles the nut. .

Check for damage of disassembled parts such as mobile contactor, fixed contactor, sliding contactor and spring, clean with cleaning agent, and A, B in combination with SLIDING SURFACE of DISCONNECTING PART In the order of C, the combination of MOVING CONTACT and SLIDING CONTACT is settled, and the guide and the spring are settled, the stopper and the spring of the SILENCER-COOLER are assembled with the stopper, the nut is tightened, and the SUPPRESSOR RESISTANCE is installed. The valves are closed, the air drain valve is closed, the air supply line valve is opened, and the date of operation test (DATER) performed after assembly is compared with the data before disassembly.

The maintenance of each part of the generator (2: GENERATOR) is performed as follows.

PMG (12) is packed with asbestos sheet (SHEET) and stored until assembly to prevent the loss of magnetic force due to impact and contact with external metal (METAL), and the ball bearing (BALL BEARING) during continuous operation Since the service life of is generally 3 years, its defects are checked.

COLLECTOR and its ring cover clean the carbon brushes (36 CARBON BRUSH) cleanly in small size and measure the amount of wear by using the vernier calipers, and the measured value is the length of the brush holder. Replace if the value minus 25cm is within 10mm, clean the carbon inside the dust collector ring cover, and damage the ghost mark and stop wear, including spike traces on the surface of the collector ring. If there are scratches or light scratches on the sliding surface of the ring, remove the marks with a fine mesh send paper (FINE-MESH (# 150 ~ 200) SAND PAPER). Brush is fragile, so pack it in small size and put silica gel (SILICAGEL) in tin and store it in dry place until assembly.

Top cover (20: TOP COVER) to clean the lower part with a rag and cleaning agent.

Excitation bus and bus shafts should be cleaned with dust and debris from the stub shafts with rags and cleaning agents, and then wrapped in plastic and stored as bus bars. ) Check the condition of fixing bolt and washer and replace the defective product. After heating the bus part with bust, remove lead and polish it by polishing (using polishing paper and string).

The upper bracket 22 (UPPER BRACKET) cleans the upper bracket 22 and the upper coil cover (UPPER COIL COVER) with a rag and a cleaning agent and paints with a combination paint.

The generator rotor (24) measures the insulation resistance with a 500V 1000 MEGGER to determine the insulation state of the rotor, measures the voltage sharing between pole pieces, and smoothes the surface of the rotor. After cleaning, use AIR to remove any residual dust and check the deformed state of the insulator (insulation color at the top and insulation of the coil bracket). Check the windings for looseness, check the cracks, loosening, excessive contamination and bending of insulators from the wires and cable leads from the windings to the dust collector ring, and the DAMPER BAR SHORT-CIRCUIT RING and coil Check if there is no crack or abnormal state in the coil bracket, check the deformation or loosening of the coating key between the rim and the spoke and check the sliding surface. Check the bracket ring to find burnt traces or abnormalities. In case of severe friction traces, perform grinding work. Check loosening or deformation of balancing weights. Check bolt nuts for looseness. In order to prevent moisture or corrosion, windings should be carefully checked to see if the varnish applied is damaged by oil or natural deterioration, and then clean the surface. Apply varnish to the skin.

The generator stator measures the insulation resistance before and after disassembly of the rotor with a 1000V 2000MEGGER to check the status of the stator, and checks the stator winding, iron core and air duct for contamination. Clean the black powder adhering to the surface of the small window cleanly and then remove the remaining dust using air, and vacuum the black powder and dust adhering to the air duct. Compressed air. Clean with a paintbrush and rags. Carefully inspect the wedges for loosening or cracking, carefully inspect the areas where insulation varnishes are not dropped or treated, clean the surface, apply varnish, and clean the surface. In order to prevent the occurrence of moisture or moisture, it is covered with small window covering. The maintenance of the stator is performed with the lower bracket temporarily assembled.

The oil and piping of the thrust bearing (29: THRUST BEARING) are stored in vinyl to filter the oil using an oil filter, to clean the oil pipe flange surface and to prevent foreign matter from penetrating. do.

The Thrust Oil Cover (41: THE OIL COVER) cleans the deposits attached to the oil cover with rags and washing water and keeps it wrapped in plastic to prevent foreign matter from penetrating.

The lower guide bearing (42: LOWER GUIDE BEARING) checks the friction of the surface of the guide bearing, and the contact surface of the bearing is cleaned by applying light oil to the small window and scraping the friction part. In order to prevent the damage, cover it with small window.

Main Coupling Bolt (51: MAIN COUPLING BOLT) is polished with abrasive paper to clean the surface and packed with vinyl to prevent foreign matter from penetrating, and bent the washer of coupling bolt. Store the site flat.

The lower bracket (45: LOWER BRACKET) is cleaned after removing the rust of the lower bracket with abrasive paper and applying grease to prevent rusting.The lower bracket (45) and the lower coil cover are cleaned with rags and cleaning agents. After that, paint with a combination paint.

The lower air deflector (48: LOWER AIR DEFLECTOR) is cleaned by rinsing the rags with clean water and painting with a combination paint.

The thrust bearing (29: THRUST BEARING) measures the thickness of six surfaces of the thrust bearing pad (PAD) with an outside micrometer before scraping, and passes through the contact surface of the bearing pad. After cleaning clean with small intestine, mix infant oil and rice paddle and bury it in small intestine bundle and apply it evenly on the surface plate. Rub the oil pad contact surface against the surface plate and rub it 3 or 4 times so that the pad of the bearing pad is buried and Scrape the site to 0.02mm in depth and 20 ~ 30mm in width, disassemble the coil spring, clean and clean it with light oil and small size, and cover it with small size to prevent foreign substances from penetrating. (COVERING)

Maintenance of the water turbine turbine unit 3 is carried out as follows.

SPIRAL CASING and DRAFT TUBE MANHOLE remove rust of Spiral Casing Manhole, clean O-ring groove cleanly, remove Draft Tube Manhole Gasket and remove rust Replace the draft tube manhole gasket.

Wakeway 106 (WALK WAY) of the turbine pit 101 (TURBINE PIT) paints the combination paint after cleaning the lower part of the wakeway 106 (WALK WAY) with a rag and a cleaning agent.

Grease line and piping should check the damage condition of copper pipe and flexible hose to prepare necessary materials, and clean the flange surface of cooling water and air pipe to clean foreign materials. Store it in plastic to prevent it.

STUFFING BOX cleans disassembled parts with loofah and water and cleans them.Measures the amount of wear of CARBON PACKING and replaces them with new ones if the wear condition is 8mm or more. Check and make asbestos gaskets between packing box joints and replace them separately. Check the corrosion status of bolts and pins. Remove rust from the packing box support and paint with epoxy paint.

Turbine guide bearing (120: TURBINE GUIDE BEARING) is settled in the state where the guide bearing is divided into two sides. Therefore, tighten the joint bolt to make it cylindrical, and check the friction state of the surface of the guide bearing to make the contact surface clean and light. After cleaning, scrape the friction part and measure the top, middle, and bottom of the inner diameter of the guide bearing before and after the scraping, and after completion, disassemble the joint bolt and divide it into 2 sides. To prevent the infiltration of foreign substances, cover and store them in a small window. Remove rust at the bottom of oil basin and paint epoxy paint.

The guide ring 130 and the guide mechanism remove grease from the guiding ring rod pin and the ECCENTRIC RINK PIN fastening part, and grind the welding part of the stopper. Remove grease from pin fastening part of guide van link, remove rust of link body, and remove grease of guide ring holder and holder fastening part.

The guide van 140 and the operating mechanism check the damage of the guide van 140 to remove rust, and then paint epoxy paint, and the upper steam and the lower steam of the guide van 140 are lowered. STEM) checks the wear condition, injects air into the grease hole of the guide van, removes the internal dirt and conducts penetration test at the same time. UPBRUSH and lower brush of the guide vans housing Measure inner diameter of (LOWER BRUSH) surface, check for damage by friction, check damage state of guide vankey groove, grind friction part, guide vankey, arm, thrust bearing, steam housing and various bolts. Check the damaged state of the machine and clean it cleanly, and check the damaged state of the U-type packing and the corrosion state of the packing grand.

The head cover 143 removes grease and foreign substances from the head cover 143, removes rust from the bottom and bottom of the head cover with a wire cup brush, and then paints with epoxy paint. If the amount of wear is over the allowable range (DESIN VALVE: 0.7mm, TOLERANCE: 0.3mm), replace it if it is over the allowable range.Check the damaged state of the packing and polish it if there are cracks and damages. After assembling the head cover 143, the combination paint is applied to a predetermined place when performing the painting work.

Bottom ring (144: BOTTOM RING), remove the bottom ring grease and foreign matter, remove the rust on the side and bottom of the bottom ring with a wire cup brush (WIRE CUP BRUSH) and then paint the epoxy paint, packing After the rust is removed and rust is removed, it is painted with epoxy paint, and the amount of wear of the head cover packing is measured to replace it if it is over the allowable range (DESIN VALVE: 0.7mm, TOLERANCE: 0.3mm), and the packing is damaged. Check the condition and grind if there are cracks and damages, replace severe points, clean bottoming base, bolts and pinholes with cleaning agent, clean with TOOL AIR, and then remove rust prevention liquid to base. After coating, wipe down the bottom ring bushing with a cleaning agent and clean it with TOOL AIR, check the bushing for damage, and measure the inside diameter of the bushing with an inside micrometer.

The runner 110 and the turbine shaft 160 clean the runner 110 with the rags and the hera, and check whether the fitting phenomenon caused by the runner blade cavitation phenomenon occurs. In detail, check whether the runner blade is corroded or cracked closely. If it is severe, paint with epoxy paint after repairing the welder. Remove rust on the COUPLING COVER and paint with epoxy paint.

Spiral casing (100: SPIRAL CASING) and STAY VANE checks whether there are any corrosion or wear parts, and checks the cooling water trap rack and leakage on the top of the penstock. Remove rust on the rust area and paint with epoxy paint.

DISCHARGE RING and STAY RING remove rust and paint with epoxy paint.

DRAFT TUBE LINER, DRAFT TUBE AND GATE check the sealing condition of the waterway passage and NATURAL AIR HOLE, and check the corrosion and cracking condition.

In this way, after the inspection and maintenance of each device is carried out assembling, the assembly is carried out the aberration assembly process (200-4) from the aberration unit (3) to the reverse of the disassembly.

RUNNER & TURBINE SHAFT is assembled by inserting crane hook into lifting device, tightening joint bolt, and runner 110 not biased to one side. After placing enough personnel at regular intervals between the BOTTOM RING WEARING RING and the runner 110, shake the copper liner (LINER) to the left and right to lower it slowly while being careful not to eccentric the runner 110 to one side. Insert tape cutter in between and settle down, disassemble the fixing bolts (4 pieces) of lifting device and hang the device on the hook, and then remove the device joint bolt. To dismantle.

Assembling the bottom ring (144: BOTTOM RING) replaces the O-rings at the top and bottom of the bottom ring base (BOTTOM RING BASE), and installs the device for drawing (DEVICE) in the crane, and then pin the bottom ring 144 to the pinhole ( Settle according to the PIN HOLE), remove the device, fix the DOWEL PIN (4), remove the 20 fixing bolts while assembling the bottom ring (144) while measuring the bottom level (LEVEL) Measure, wipe the bushing clean with a cleaning agent, clean with TOOL AIR, and apply grease to the inside.

Assemble the guide van 140 (GUIDE VANE) by mounting the wire rope and the chain block on the crane with the tool for pulling out and the eye bolt on the upper guide vane STEM (LOWER GUIDE). Lower the chain block so as to be close to the VANE STEM BUSING HOLE, and insert and assemble the guide vans (140: 20) so that two people shake the guide vans 140 from side to side to prevent damage to the bushings. SHUTTER surfaces between the vans 140 are closely attached to each other, and then the drawing tool and the eye bolt are removed.

To assemble the head cover (143: HEAD COVER), replace the O-ring on the STAY RING, apply the anti-rust solution to the head cover base, and complete the maintenance on the bottom of the head cover. Place one guide vans housing, seat the head cover 143, evenly distribute the four wire ropes to the crane to check the horizontal and raise the crane (UP) and then the head cover 143 by the signal Move slowly, take care that the gap between the aberration chamber wall is narrow when assembling, be careful not to come in contact with the accessories installed on the wall, keep the head cover 143 from contact with the upper guide vans and maintain the horizontal state While down, the pinholes are settled down and the pinholes (4) are fixed.Then, the fixing bolts are tightened while measuring the head cover level. LEVEL).

To assemble the guide van (140: guide vane) operating mechanism, use the guide vane u-type packing (20 pieces) inserting tool to seal the outer diameter of the upper guide vane on the head cover (143). Apply grease to PACKING, insert grease to GUIDE VANE STEM HOUSING BUSING, and then fasten stem housing (SOCKET HEAD BOLT) to fix stem housing (20 pieces). Hook up the van arms (20 pieces) to the crane and chain them down and slowly put them down on the upper guide vanes to assemble them horizontally. Assemble the guide vane thrust bearings and tighten the fixing bolts (6 pieces). Assemble after coating MOLYCOTE to prevent rust on 40 GUIDE VANE ARM KEY: Assemble and assemble HEX 'NUT, measure guide gap 140 upper and lower gap of guide van 140 Adjusting ADJUSTING LINER so that it is located in the middle of upper and lower part And phase. The material for the gap. After checking the lower semi-tightening the nut when the lower portion of the gap to be accurate.

Assemble the guide vane servo motor (150: GUIDE VANE SERVOMOTOR) by hooking the wire rope to the crane so that it does not move on the body of the servo motor, lifting the crane up and down to the assembly position, and chaining the hooks on the ceiling of the servo motor. Hook the block and hook the body of the servomotor, pull the chain block slowly to fit the fixed bolt hole, and fasten the fixed bolts (12 pcs) with the center of gravity with the chain block, and the servo motor oil pipe. Tighten the flange to open / close the hydraulic piping work, and tighten the flange of the oil drain pipe line.

The assembly of the guide ring 130 and its operating mechanism is carried out as follows.

Before assembling the guide ring 130, insert the ECCENTRIC RINK PIN of the guide van link, assemble the link, apply grease to the head cover bushing, and then assemble the guide ring 130 with a crane, and guide ring holder. Assemble (GUIDE RING HOLDER: 10 pieces) and tighten the bolts (40 pieces). Use the hydraulic operation key to match the connecting rod with the rod pin hole of the servo motor, apply grease to the rod pin bushing of the connecting rod, and then assemble the rod pins (2). Insert the rod pin stopper and weld it with the connecting rod to fix the rod pin. Apply grease to the guide van link bushing, match the guide pin with the shear pin hole, and insert the shear pins (20 pieces). Tighten the nut and lock it by tightening the guide vane arm locking bolt. Adjust the gap of the guide van shooter, adjust the closed contact between the guide vans, adjust the eccentricity of ECCENTRIC RINK PIN, and guide the chain block while pulling the chain block by hanging the wire rope in the middle of the guide van body. Make sure the van shooter surface is in contact with each other, adjust the guide van's No.1 link to the standard length, and close the NO1 and NO2, NO2 and NO3, ----- NO19 and NO20 Adjust each link (LINK) of the guide van not adjusted so that the gap between the contact surfaces is "0" but the gap between the guide vans NO20 and NO1 is ± g but is "0". The gap between guide vans NO20 and NO19 can be reduced to near zero when repeated adjustments are made as described with reference to the guide vans NO20 to reduce the gap ± g.

After adjusting the gap of the shooter surface, fix the ECCENTRIC RINK PIN STOPPER and fix the link pin by welding with the guide ring.

Assemble the stuffing box as follows.

Install the packing box support divided into 4 pieces on the head cover so that the connection part and the bolt hole coincide, and put the seat gasket into the connection part and assemble it. Lift the packing box support and lift the head Replace ROUND RUBBER PACKING on cover.

Assemble the packing box support to the head cover, check the sealing water supply flange, align the resin packing to the box support, and tightly adhere to the shaft, but maintain the gap between packings, and the gap between packing holders. Align regularly, insert the coil spring, and replace the round louver packing of the packing box support.

Assemble the packing box (BOTTOM) as described above, align the packing holder with the spring using the four packing holder setting boards, draw out the setting board and pack the packing holder tensioning tool. The holder is tensioned by using, and the packing holder is pulled out using the packing holder spacer (SPACER) and the tension tool is removed.

Align the carbon packing tightly to the shaft, replace the round rubber packing of BOTTOM, assemble the packing box in the same way as described above, packing holder, Assemble coil spring, carbon packing, replace round rubber packing of packing box, assemble packing box cover and sealing water supply pipe, gap between shaft slide and packing box after assembly Four checks are also performed.

The assembly of the turbine guide bearing (120: TURBINE GUIDE BEARING) is carried out as follows. Replace the oil barrel round rubber packing, assemble the oil cylinders (2), fasten the fixing bolts (64), and check the oil to check for abnormalities after completing the assembly of the oil cylinders. Fill the bottom of the tank with 40 liters of diesel oil and carry out LEAKAGE TEST for about 12 hours. Clean the diesel oil after the test is completed.

Assemble the cooling coil (2SET), fasten the fixing bolts (16 pieces) to the flanges, assemble the guide bearings by tightening the turbine guide bearing joint bolts (10 pieces), and fasten the fixing bolts (20 pieces), and guide them after assembly. Measure the bearing gap, assemble the guide bearing RTD and thermometer, and connect the wiring.

Replace the guide bearing cover base round rubber packing (Guide BEARING COVER BASE ROUND RUBBER PACKING), align the guide bearing cover (2 pieces) with the oil level gauge hole, and replace the joint bolts (14) and fixing bolts (80). Assemble the oil level switch, sight gauge and oil contactor detector, assemble the vibration detector (2 pieces) and fill the turbine guide bearing tank with oil.

The assembly of grease line and pipe line connects copper pipe line for pressure measurement of RUNNER CROWN and sealing water, and stuffing box cooling water pipeline and RUNNER AERATION SUPPLY It connects pipe line and assembles check valve and swivel connector, general connector and distributing valve, and copper pipe. Flexible hose. Connect grease line of carbon steel pipe.

The assembling of the turbine pit (101: TURBINE PIT) of the wakeway (106: WALK WAY), assembling the support (106-1) of the hawkway (106: WALK WAY) and fixing the outer side walkway (OUTSIDE WALK WAY) , Install the foot of INSIDE WALK WAY, fasten the fixing bolt, and install the ladder, the foot (two places) and the hand rail (HAND RAIL) in the turbine pit 101.

The gap measurement of the guide van 140 (GUIDE VANE) and the runner 110 (RUNNER) is performed as follows.

When the overhaul and repair of the turbine part (TURBINE PART) is completed, the gap between the guide van 140 and the runner 110 is finally measured in the same manner as before disassembly. The operator enters the spiral casing manhole to measure the gap between the guide van 140 and the upper head cover and the lower bottom ring, measure and record the gap between the guide van 140 and the servomotor stroke, and runner and head cover. WEARING, BOTTOM RING, BOTTOM RING Measure the distance from the WEARING RING.

To open the gap between guide van gap and guide van, open it as follows. Operate the manual of the oil pump, switch the turbine control switch (AUTO / MANUAL), insert a paper spring so that the force is applied upward to the converter upper spring (OPEN direction), and solenoid valves. Switch to manual operation (20WC: CLOSE / OPEN, 65S: SHUT / RELASE, 74LS: SHUT / RELASE), and manually open the guide van 140 by operating the load limiter knob (OPENTER KNOB). The monitor is placed on the turbine feet to open full.

Measure the gap between the guide vans 140 in the state in which the guide vans 140 are fully open, and when the measurement is completed, the guide vans 140 are gradually closed by using a rod limit knob while the personnel are withdrawn. Close the main valve of the pressure tank, and turn off the power of the oil pressure pump from MANUAL in the MCC PANEL.

As a safety management, the gap measurement between the runner and the BOTTOM RING WEARING RING is measured after the scaffold is safely installed in the draft tube, and the gap of the guide van 140 when the guide van is fully open is measured by the operator. Since the work is carried out between the guide van 140 is closed in case of danger, the stopper should be inserted in the upper part of the distributing valve so that the distributing valve is not closed by the stopper even if it receives a closing signal.

Combination of Spiral Casing 110 and Draft Tube Manhole 101 cleans foreign substances in the casing and removes ladders when the internal inspection of Spiral Casing is completed. Replace and pull the manhole round louver packing to close it, tighten the fixing plate and bolt of the casing manhole, remove the scaffold and ladder when the internal inspection of the draft tube is completed, close the draft tube manhole and tighten the fixing bolt The casing and draft tube manholes are closed, followed by background treatment and coating with the combination paint (grey).

By performing in this way, the assembly of the water turbine unit 3 is completed, and then, a generator assembly step 200-5 for assembling the components of the power generation unit 2 is performed.

First, the scaffold is installed in the turbine pit 101 as follows. Install the coupling bolt, lower air deflector and oil pipe inside the turbine pit 101 at a convenient height, and set up the scaffolding and pipe scaffold at a suitable height, and place the scaffolding and pipe scaffolding on the upper part. Install the scaffolding by tying it up, install the plywood on the upper part and fix it so that it does not come off, and prepare the assembly work by transporting coupling bolts and nuts, covers, oil pipes, sleepers and tools.

To assemble the lower air deflector (48: LOWER AIR DEFLECTOR), one side of the lower air deflector (48: LOWER AIR DEFLECTOR) is horizontally hung on the crane using a wire rope, and then the crane is raised slowly to be settled. Then, fix the bolts and joint bolts by placing the second and third in the same way.

Assemble the lower bracket (45: LOWER BRACKET) as follows.

Evenly distribute the wire rope and hang the lower bracket (45: LOWER BRACKET) on the crane to raise the crane while maintaining the horizontal state, then lower the lower bracket (45: LOWER BRACKET) gradually and lower the lower bracket (45: lower coil cover included) ) And set it to the pinhole, apply MOLYCOTE to DOWEL PIN (6 pieces), fix it, and then fasten the fixing bolts (12 pieces) while checking the level of the bracket, and measure the level after assembly.

Tighten the fixing bolt to the middle joint part of the lower coil cover, and fix the lower air deflector and the support to the lower bracket by tightening the bolt.Tighten the oil pipeline flange through the oil cooler and pipe the lower bracket. Clean the inside of the engine (thrust bearing tank).

THRUST BEARING (49: THRUST BEARING) assembles 12 bearing pads using a crane, checks the position and quantity of coil springs and tightens the bearing pad stopper.

The assembly of the generator shaft 50 including the trust runner 40 is performed as follows.

After lifting the crane horizontally by lifting the lifting device to the crane using a wire rope, the generator shaft (50: including the thrust runner 40) is gradually moved, and the lower oil well is placed when the generator shaft 50 is settled. The gap between the outer diameter of the WELL TUBE and the outer diameter of the shaft is 20mm, and the various parts are assembled together in the inside of the thrust bearing tank. Apply MOLYCOTE to the inner part of upper part.

Tighten the fixing bolts of the thrust bearing 49 and the lower oil well tube base, clean the thrust bearing pad, apply oil after assembly, and remove the lifting device.

Straighten the bent part of the thrust bearing RTD, and then fix the RTD HEAD correctly to the bearing position to prevent the RTD PIPE from being bent.Use the bond on the flange of the through bracket of the lower bracket to prevent oil leakage. Also connect thermometers of thrust bearings and various wiring.

The main coupling bolts (51: MAIN COUPLING BOLT) are assembled as follows.

Four spare bolts for assembly are fastened together with a square plate on NO4, 5, 12, and 13, and a jack jack is installed at the center of the plate to raise the jack up to 600kg / ㎢. Close the flange surface, and fasten the eye bolt to the fixing bolt hole of the lower oil well tube to install a pair of chain blocks on the left and right, and put the main coupling bolt washers (8 pieces) on the flange and coupling with the chain block. Lift and insert the bolt, install the coupling bolt and nut assembling tool and measure the tightening pressure (300Kg / 하여) using the hydraulic pump while considering the influence on the main shaft and other equipment. After tightening the nuts (12 pieces) of the coupling bolts in sequence, remove the 4 spare bolts, the plate and the jack ram.

Tighten the remaining four coupling bolts and nuts, remove the hydraulic pump and the assembly tool, and measure the length of the coupling bolts after assembly.

After tightening the joint bolt of the upper cover of the coupling bolt divided into two sides, lift it up with the chain block and fasten the fixing bolt, and then tighten the joint bolt of the lower cover of the coupling bolt divided into two sides and then lift the joint bolt into the chain block. After mounting, fasten the fixing bolts, remove the chain block, assemble the lower air deflector on the shaft side, and then remove the scaffold of the turbine pit.

Lower oil guard (43: LOWER OIL GUARD) cleans the thrust bearing tank cleanly and inserts the lower oil guard.

Assemble the lower guide bearing (42: LOWER GUIDE BEARING) to assemble the bearings (16 pieces) by fastening the eye bolts on the upper part of the bearings, and fasten the ADJUSTING BOLT (16 pieces) so that the gap is 24 ~ 27m / m. Afterwards, measure the gap between the bearing and the adjusting bolt with a gap gauge, and tighten the guide bearing cover (16 pieces).

Thrust oil cover (41: THRUST OIL COVER) assembles oil cover after checking the direction of air pipe flange of thrust oil cover, pipes air supply and exhaust pipe, and assembles LABYRINTH GAP after assembling lower guide bearing RTD and thermometer. Measure

The trust runner 40 measures the level LEVEL after assembly.

For thrust bearing tank oil and generator room piping, fasten the manhole for checking the bearing oil tank, and refill the thrust bearing tank (connect the auxiliary tank and hoses prepared at the rear of the valve installed on the outer wall of the generator room and operate the pump to fill the thrust bearing tank). Accurately check whether there is leakage after finite), weld the support of the generator room conduit and connect the wires and wiring.

The assembly of the generator rotor is performed as follows.

After inserting the crane hook into the rota lifting device, fasten the joint bolts, raise the crane with the rota (24) fastened to the crane, and when the overhead crane is loaded, measure the level to accurately level and move slowly. After lowering, the small window is installed to prevent the inflow of dust and foreign matter in the stator (30).

In order to avoid contact between the core of the rotapol and the stator 30, the coil, etc., a sufficient number of members is placed, and the wooden board is inserted between the rota 24 and the stator 30 to rock the rotor 24 up, down, left, and right. Protect the pole, core and coil at the same time, maintain the gap between the rota spoke and the generator shaft flange at about 10mm, match the bolt holes correctly with the crane paused, lower the crane completely and remove the lifting device.

The fixing bolt of the rotor 24 is fastened by measuring the tightening pressure (300Kg / ㎢) using the hydraulic pump in the diagonal order, and the stopper is welded to the fixing bolt of the rotor 24 to prevent loosening. The air gap of the rotor 24 and the stator 30 and the gap between the rotor 24 and the brake are measured for 6 to 8 points.

In the assembly of the upper bracket 22 (UPPER BRACKET), the wire rope is evenly distributed to the crane, the upper bracket 22 is suspended and the crane is raised while raising the crane, and then the upper bracket 22 is gradually lowered, and the upper bracket ( 22: Set the upper coil cover) to the pinhole, apply MOLYCOTE to the dowel pin (8 pieces), fix the foundation bolts (FOUNDATION BOLT: 16 pieces) while keeping the bracket horizontal, and secure the upper coil cover. Tighten the fixing bolts and measure the level after completing the assembly.

The assembly of the STUB SHAFT and the EXCITATION power supply bus bar shall be carried out as follows.

Tighten the eye bolts (two) on the shaft flange, wire rope to the crane, set the stub shaft to the bolt, tighten the fixing bolt of the stub shaft, and measure the level after assembly.

Fasten and assemble PMG ball joint coupling fixing bolts (8 pcs), fasten bus bar support and bus bar fixing bolts. After complete tightening, after the solder is completely hardened, retighten the bolts. Tap BUS BAR MICA TAPE in about 4 layers, tape it to about 8 layers with asbestos tape, and apply varnish.

The assembly of the top cover 20 is assembled by moving to the crane in order to fasten the fixing bolts, and assemble the support of the top cover 20.

Assemble the collector ring cover as follows.

Use crane to slowly down to the bolt hole, protect with dust gasket sheet to prevent damaging the surface of dust collector ring, and then slowly lower the crane to settle, and fix bolt of dust collector ring cover ( Tighten 4).

Connect the wires for pilot brush (PB1, PB2), fix the jack up limit switch (JACK UP LIMIT SWITCH) support, fasten DC bus bar and dust collector ring joint bolts (8 pcs), generator carbon brush Assemble the CARBON BRUSH.

The PMG 12 is assembled by using a crane to assemble the PMG 12 in accordance with the bolt hole, tightening the PMG fixing bolt, measuring insulation resistance with the PMG 500/1000 MEGGER, and drawing the lead wire and the PMG lead wire of the signal lamp. After wiring, put on the cover of the signal lamp and fasten the fixing bolts (8 pcs.).

In this way, the assembly of the generator unit 2 is completed by completing the construction. When the assembly of each apparatus of the aberration generator is completed, the construction and rearranging work to withdraw the air ducts and materials and arrange them in place, check and test process (200-6). ).

After cleaning each part of the top cover, generator room, and turbine feet, paint the combination paint, clean the floor of each floor in the power plant, and return the equipment operated before disassembly.

Addition work is carried out as follows. Open and fill the balance valves (W67, 68) for filling in the draft turbine, open the draft tube gate after checking the pressure in the draft tube, and open the intake bypass valve (INTAKE BY-PASS VALVE) While filling the inside of the PENSTOCK, operate the air vent valve from the turbine feet to discharge the air.

After checking the internal pressure of PENSTOCK, open the intake gate to add water and when the water is completed, manually operate the coolant electric valve to check the flow of coolant and check the following.

Check for leaks in the spiral casing and draft tube manholes, check (check) for excess leakage in the packing box of the spindle and guide vanstem (STEM), and check that the oil gauge of the main guide bearing oil reservoir is correctly adjusted. Check that the accuracy of all pressures and all thermometers are correctly indicated, check that the protective device is not in the trip (TRIP) position, check whether the draft tube-air intake system is ready for operation, grease Recheck that the timer is adjusted for correct operation of the supply system.

After the rearranging is completed, the generator section (2), turbine section (3) and general inspection items are measured and tested to see if the generator can operate normally.

The generator unit 2 measures PMC insulation resistance, MEASUREMENT OF CARBON BRUSH ABRASION capacity, ROTOR POLE PIECE voltage check, generator rotor and stator air gap check, pressure measurement when disassembling / assembling the rotor fixing bolt, and rotor and stator insulation resistance measurement. Check the thickness of the thrust bearing pad, the generator guide bearing gap check, the trust oil cover LABYRINTH gap check, the MEASUREMENT OF GAP FOR BRAKE SHOE AND RING, MEASUREMENT OF THICKNESS FOR BRAKE SHOE, MEASUREMENT RESISTANCE CHECK AND ANXILIARY.

The turbine section 3 includes a gap check of each runner, a turbine guide van gap (upper and lower) check, a measurement of guide vane AO check, measurement of pressure and bolt extension during coupling bolt disassembly and assembly, and guide van stem housing bushing. Inner diameter measurement (upper and lower), lower guide ban stem inner diameter measurement, bottom ring and head cover packing wear measurement, fixed centering, MEASUREMENT OF PACKING BOX GAP, MEASUREMENT OF THICKNESS FOR CARBON PACKING, MEASUREMENT OF TURBINE GUIDE Measure the inner diameter of bearing gap and turbine guide bearing.

In general, SETTING VALUE ADJUSTMENT OF LEVEL SWITCH FOR BRG 'OIL BOX, OPERATION TEST GENERATOR AIR BRAKE, SETTING VALUE ADJUST OF LIMIT SWITCH FOR GOVERNOR, ADJUSTMENT AND SETTING OF CONTROL VALVE, MEASUREMENT OF LEAKAGE FOR PRESSURE OIL SYSTEM, CALIBRATION PRESSURE GAUGE, SETTING VALUE ADJUST OF PRESSURE SWITCH FOR AIR SYSTEM, MEASUREMENT OF LEAKAGE FOR AIR TANK & AIR LINE, SETTING VALUE ADJUST OF REDUCING VALVE FOR AIR SYSTEM, DISCHARGE TEST OF AIR COMPRESSOR, MOTOR VALUE OPERATION CHECK, DISCHARGE TEST DRAINAGE PUMP VALUE ADJUSTMENT OF LEVEL SWITCH FOR DRAINAGE PIT, SETTING VALUE ADJUSTMENT OF PRESSURE RELAY FOR OIL SYSTEM, SETTING VALUE ADJUSTMENT OF LEVEL SWITCH FOR PRESSURE OIL SYSTEM, DISCHARGE TEST OF PRESSURE OIL PUMP.

By performing various measurements and tests in this way, completion of the inspection and test process (200-6) for the aberration generator is completed (295).

As described above, in the repair method of the aberration generator according to the present invention, the generator and the aberration are sequentially disassembled and assembled in the reverse order after inspecting, maintaining and repairing the disassembled parts, but the fixed body is correctly set in the correct position and the rotating body. By assembling the assembly, it is possible to carry out disassembly and maintenance inspection efficiently and accurately, and to shorten the disassembly and maintenance inspection time. Therefore, it is possible to continuously maintain the performance of the aberration generator and extend its life.

Claims (4)

delete Preparation process 200-1, generator decomposition process 200-2, aberration decomposition process 200-3, decomposition equipment inspection process 239, aberration assembly process 200-4, generator assembly In carrying out the process 200-5 and the inspection and test process 200-6 sequentially, The preparation step (200-1) is a pre-disassembly operation state check step (201), the INTAKE GATE closing step 202, the draft tube gate (DRAFT TUBE GATE) closing step 203, each part oil / coolant / Performing the drain valve (OIL / COOL WATER / DRAIN VALVE) operation step 204 and the in-flight wiring separation operation step 205; The generator decomposition process 200-2 includes PMG decomposition withdrawal process 206, COLLECTOR RING COVER decomposition process 207, TOP COVER decomposition process 208, and STUB SHAFT. And STUB SHAFT take-out process (209), upper bracket decomposition take-out process (211), upper coil cover (UPPER COIL COVER) disassembly process ROTOR decomposition drawing out process 212, lower oil guide decomposition drawing out process 213, generator guide bearing drawing process 214, generator shaft drawing out GEN, SHAFT The settling process (215), the THRUST BEARING withdrawal settling process (216), the lower bracket (LOWER BRACKET) disassembly withdrawal settling process (217), and the lower air deflector disassembly withdrawal process (218) in sequence Carrying out; The aberration decomposition process (200-3) hoists the manhole of the spiral casing (100: SPIRAL CASING) and the manhole of the draft tube (101: DRAFT TUBE), and the gap of the guide van 140 (GUIDE VANE) After measuring the gap between GAP) and RUNNER, Turbine Pit WALK WAY and Grease Line Separation Process 220, Shear Pin and Guide Van Lever Pin (GUIDE VANE LEVER PIN) Disassembly Process (221), Guide Van Cap, GUIDE VANE AMY KEY Disassembly Process (222), Guide Van Trust Bearing (GUIDE VANE THRUST BRG ') Disassembly Process (223) GUIDE BEARING COVER Disassembly Drawing Process (224), Bearing Cover Support (BEARING COVER SUPPORT) Disassembly Drawing Process (225), Turbine Guide Bearing Oil Cooler (TURBIN GUIDE BRG 'OIL COOLER) Disassembly Drawing Process (226) , Packing and packing box disassembly drawing process (227), coupling bolt cover (COUPLING BOLT COVER) disassembling process (228), main coupling bolt (MAIN CO) UPLING BOLT) Decomposition process (229), GUIDE VANE LEVER take-out process (230), GUIDE VANE STEM HOUSING take-out process (231), guide ring (GUIDE RING) take-out process (232) HEAD COVER Exploded Drawing Process (233), Guide Van Servo Motor (GUIDE VANE SERVO MOTER) Withdrawal Settlement Process (234), Guide Van (GUIDE VANE) Withdrawal Settlement Process (235), BOTTOM RING Sequentially carrying out the drawout settling step 236, the runner and shaft separation settling step 237, the turbine shaft separation settling step 238, and the decomposition equipment inspection step 239. Repair method of a water generator. The method according to claim 2, The rotor disassembly take-out settling step 212 for disassembling and drawing out the rotor 24 of the generator, Measuring the air gap D1: AIR GAP between the rotor 24 and the stator 30 and the gap between the rotor 24 and the brake before disassembling the rotor 24; After dismantling the welding part of the rotor fixing bolt stopper, remove the fixing bolt and disassemble it while checking the pressure by using a hydraulic oil pump (HYDRAULIC OIL PUMP), Rim support and jacks are arranged at regular intervals in order to assemble and install a device that can take out the rotor 24 and to quickly support it when the rotor 24 is settled. One thing, In order to prevent the rotor poles, stator cores (35: STATOR CORE), coils, etc. from being damaged when the rotor 24 is pulled out, the personnel are arranged at intervals of 1 to 2 m. When pulling out the rotor 24, the wooden board is pulled out while shaking up, down, left, and right, and the drawer is removed while protecting the rotor 24 and the stator 30 from contacting each other, but the crane is stopped every time the rotor 24 is sequentially taken out. Withdrawal while checking and adjusting level LEVEL repeatedly Apply grease to prevent rust on the protrusions of the drawn rotor contact surface (COUPLING surface, ROTOR SPOKE surface), and cover it with small window to prevent foreign matter from penetrating into the rotor rim or moisture. (COVERING) repair method of a water-powered generator characterized in that it comprises. The method according to claim 2, The method of centering the fixture in the aberration assembly step 200-4 is to install a support across the upper sides of the generator fixture, install a centering device in the center, and then use the piano wire as the measurement reference line. Suspending the weight to the lower end of the piano wire so as to be located on the center line of the ring, and repairing the aberration generator, characterized in that measuring the dimension between the piano wire and each of the fixing parts (INSIDE MICROMETER).