发电机安装使用维护说明书 英文

1 Operation of generator1.1 Preparations before start-up, including:a) Clean the work-yard and the generator set from any debris.b) Check the tightening condition, lock the gasket tightly, tack weld if necessary; keep therotatable parts clean.c) Check the inlet and outlet water pipelines, oil pipelines and valves, in order to know ifthere are leakages and problems of water flow in the pipe.d) Check the level of lubricating oil, oil number, oil quality, water pressure, and recordthe water temperature and ambient temperature.e) Check each connecting cable, to make sure that the joints contact well and withoutrust, connection is right, and the marks are complete and distinct.f) Check if the equipments of high-pressure oil and the brake run normally, and if thebrake pressure can meet the relevant requirements.g) Check the fire extinguishing system and other protecting facilities, to ensure security.h) Check the gaps between rotating parts and stationary parts, especially when there aredimension requirements.i) Make preparation work of recording before start-up.1.2 Initial no-load start-up operationThe time of initial start-up of generator, operating sequence and the general commandershall be determined through consultation among the buyer, the seller and the installationentity.1.2.1 Under the organization of the general commander, the operators and monitors shallget ready.1.2.2 Before start-up, first open the cooling water of the upper and lower oil cooler and aircooler. The temperature of the oil in the oil tank shall not be lower than 100C, andthat in the plastic bush tank shall not be lower than 50C.1.2.3 Push the rotor upward with high-pressure oil, and make the thrust pad lubricate toavoid dry friction.1.2.4 Manually start the generator and let the rotating speed increase to 30% ~ 50% of thenominal speed, so that the oil-bound film can be quickly formed. Let it run for aperiod of time and check the bearing temperature every 1 min., until the value keepsstable. There shall be no sharp increase of bearing temperature. At the same time,monitor the sound and observe every part to see if an abnormity occurs.1.2.5 When the generator running becomes stable and bearing temperature is normal,increase the rotating speed to the nominal speed gradually. Make the detectingrecords timely:a) bearing temperatureb) temperature of inlet cooling water and outlet cooling waterc) oil leveld)vibration of rack1.2.6 If the vibrationg of the generator meets the requirements (otherwise balance test willbe needed), and the temperature of the bearing bush keeps stable, the machine canbe stopped for check.1.2.7 Checking after the generator stopsa) looseness, etc. in the parts of the rotor;b) resetting of the brake;c) Leakage of oil and water, and oil splashing of the upper and lower oil pipe.1.3 Initial on-load run1.3.1 Before the initial on-load run, the approval of relevant authority is needed, and thechecking work of the phase sequence of network and the generator shall be welldone. At the same time, open all the cooling water, and check water pressure andflow, level of lubricating oil, winding of stator and rotor, bearing, etc., and makegood preparation before start-up.1.3.2 Increase exciting current gradually at the nominal rotating speed. Only whengenerator’s voltage, frequency and phase angle meet the requirement of network,synchronize them and switch on, and then increase loads in phases, and at thesame time make good records, like increase of temperature, vibration, etc.1.3.3 If there are no abnormalities, bring the load to rated power, maintain hour running,and check carefully the following items:a) temperature of stator and rotor winding;b) temperature of thrust bearing and guide bearing;c) temperature of inlet and outlet wind;d) vibration of the rack;e) electric spark at the bus rings;f) Excitation data at the condition of no-load and on-load;1.3.4 Set the technical parameters according to relevant technical requirements.2 maintenance of generator2.1 The personnel of operation and maintenance of power station shall know and master thegenerator’s structure and performance, and shall have a certain professional level on theoperation and maintenance of generator, so as to guarantee the normal running of thegenerator. The operator shall record the service data on time, if the following phenomenonoccur, shall stop it and check:a) vibrating and shaking abnormally;b) there is knocking sound;c) bearing temperature increasing suddenly, or oil level rising and loweringd) discontinuance of cooling water;e) temperature of the stator and the rotor rise too much;f) There are abnormal oil mist, smog, empyreuma, etc.2.2 Keep the inside of the generator clean and dry, without dust, oil, water, etc., so that canmake the ventilation and elimination of heat of the motor easier, improve the insulationresistance, and prolong the operating life span of the motor.2.3 Wash periodically the oil tanks of upper and lower rack and the copper pipe cooler, andcheck if there is leakage, in order to guarantee safe operation.2.4 Take samples periodically and test the quality of lubricating oil.2.5 Check the pressure of collector rings, brush yokes and electric brush periodically andobserve the wearing condition of carbon brush and electric spark.2.6 Check the braking system regularly for air pressure, oil pressure and wearing condition ofbraking-shoe.2.7 Check all the connecting cables and joints periodically for looseness, poor contact, etc.causing overheating, rust, etc.2.8 The maintenance of stator includes:a) check insulation resistance of stator coil regularly;b) observe if there is heating at the ends of stator, looseness of the insulating parts,abnormal heating at the joints of stator, and deformation at the ends of winding;c) if there is looseness and abnormal noise of iron core of stator;d) if there is looseness at slot wedge, loose weld between the pressed disc of stator andventilation grid, etc.e) If there are looseness of the fastening parts in the base, or loose weld between thepressed disc of stator and ventilation grid, etc.2.9 The maintenance of rotor includes:a) check periodically if there is deformation of rotor, especially after runaway;b) shall regularly check the insulation resistance of rotor winding to see if there isshort-circuit.c) check the damping bar and damping ring to see if there is loose weld anddeformation.d) check if there are looseness of all the fastening parts at the rotating parts.e) observe if the iron core of magnetic pole is loose, and if the coil of magnetic polemovedf) check if the leading wire of rotor and leading wire between the poles of magnetic coiljoint well and no loose.g) observe regularly the inside of the rotor support, and the space between thelaminations of magnetic yoke to avoid the entry of foreign matters.2.10 The maintenance of generator bearing includes:a) Generally, the temperature of tungsten bearing bush shall be less than 650C, and themaximum temperature can not exceed 700C. The temperature of hot oil in the plasticbearing bush can not exceed 500C, the temperature of the body of thrust bearing bushcan not exceed 550C, during the running of generator, the value of resistancethermometer alarm and set stop value can be 10K~15K and 15K~20K higher thanthe normal running temperature respectively; and not to exceed the above mentionedvalue.b) When start the generator in winter, the oil temperature in the oil tank can not be lessthan 100C. For the plastic bearing bush, start-up is allowed if the oil tank temperatureis 50C and above.c) If not in use for over 48h, before start the generator, push the rotor upward to avoiddry friction and bush-burning. For plastic bush, the generator can be started directlywithout pushing the rotor within 30 days.d) To switch off, in case of tungsten bearing bush, only when the rotating speed slowsdown to 20%~30% of nominal speed, can the generator be braked off, while in caseof plastic bush, 10% of nominal speed is allowable.2.11 During the normal running of the generator, generally, the personnel of operation andmaintenance shall not enter the doors of upper and lower cover plate to avoid danger. 2.12 Do not stop the generator if the braking system is abnormal.2.13 During maintenance of the generator, brake the rotor or push the rotor upward to avoidself-rotation caused by leakage of water.2.14 Clean the air cooler periodically to keep good exchange of heat. In winter, reduce coolingwater appropriately according to the temperature rise to avoid moist on the coolingwater pipe.2.15 All the automation components and metering devices of the generator shall be monitoredand measured periodically.2.16 Pay attention to the alarm signal in order to handle them timely.2.17 All the spare parts shall be kept and stored well.。