What is the function of emergency solenoid valve of hydrogenerator?

1. What are the basic functions of the Governor? The basic functions of the governor are: (1) it can automatically adjust the speed of the hydro-generator set to make it run within the allowable deviation range of the rated speed to meet the requirements of the power grid for frequency quality; (2) It can make the hydro-generator set start quickly automatically or manually to meet the needs of power grid load increase or decrease, normal shutdown or emergency shutdown; (3) When the hydro-generator sets run in parallel in the power system, the governor can automatically undertake the scheduled load distribution. It can make each unit run economically. (4) It can meet the needs of dual coordinated regulation of propeller turbine and impulse turbine. 2. What are the types of impulse turbine governor series in China? The series spectrum of governor of impulse turbine mainly includes: (1) mechanical hydraulic monotonic governor, such as T- 100, YT- 1800, YT-300, YTT- 35, etc. (2) Electro-hydraulic monotonous governor, such as DT-80. Mechanical and hydraulic double-regulating governors, such as ST-80, ST- 150, etc. (4) Electro-hydraulic double regulating governors, such as DST-80 and DST-200. In addition, the medium-sized governor CT-40 of the former Soviet Union and the medium-sized governor CT- 1500 produced by Chongqing Hydraulic Turbine Factory are used as the series spectrum. The reasons other than the governor itself can be summarized as follows: (1) Hydraulic factors lead to the fluctuation of turbine speed due to the pressure fluctuation or vibration of water flow in the diversion system; (2) Mechanical factors cause the main engine to oscillate; (3) Electrical factors lead to uneven gap between generator rotors, unbalanced electromagnetic force, unstable excitation system and voltage oscillation. The poor quality of manufacturing and installation of permanent magnet motor leads to power supply signal pulsation. Faults caused by the governor itself: before dealing with such problems, we must first determine the types of faults, and then further narrow the scope of analysis and observation, so as to find out the causes of faults as soon as possible, so as to prescribe the right medicine and quickly eliminate faults. The problems encountered in production practice are often complicated and there are many reasons. This requires that besides mastering the basic principle of governor carefully, we should also check the manifestations of various faults. YT series governor is mainly composed of the following parts: (1) Automatic regulating mechanism includes flyweight and guide valve, buffer, permanent differential regulating mechanism, transmission lever device of feedback mechanism, main pressure distribution valve, relay, etc. (2) The control mechanism includes speed change mechanism, opening limit mechanism and manual operation mechanism. (3) Hydraulic equipment includes return oil tank, pressure oil tank, intermediate oil tank, screw oil pump set and its control electric contact pressure gauge, makeup valve, check valve and safety valve. (4) Protection devices include motor protection, limit switch, emergency stop solenoid valve, emergency low-pressure signal device of oil pressure equipment, etc. of speed change mechanism and opening limit mechanism. (5) Monitoring instruments and other indicators, including speed change mechanism, constant difference adjustment mechanism and opening limit mechanism, tachometer, pressure gauge, oil leakage device and oil pipeline, etc. YT (1) is a synthetic type, that is, the governor oil pressure equipment and relay are integrated into one, which is convenient for transportation and installation. (2) It can be applied to vertical or horizontal units in structure, and can be applied to hydraulic turbines by changing the assembly direction of the main pressure distribution valve and the feedback cone. Different opening and closing directions of mechanical devices. (3) It can meet the requirements of automatic adjustment and remote control, and can be operated manually to meet the needs of the start-up, accident and maintenance process of power stations with independent power supply. (4) The flying pendulum motor adopts an induction motor, and its power supply can be supplied by a permanent magnet generator installed on the shaft of the hydraulic turbine set, or by a generator outlet bus through a transformer, which can be selected according to the needs of the power station. (5) When the flying pendulum motor loses power and is in an emergency, the mechanism. (6) It can be modified to meet the needs of communication operation. (7) The operation mode of hydraulic equipment is intermittent. (8) The oil pressure equipment can automatically replenish the air in the pressure oil tank according to the oil level in the return oil tank within the working pressure range, so as to keep a certain proportion of oil and gas in the pressure oil tank. What are the main components of 6.6? TT series princes? It mainly consists of (1) flying pendulum and pilot valve, (2) constant sliding mechanism, speed change mechanism and its lever system, (3) buffer, (4) relay and manual operator, (5) oil pump, overflow valve, oil tank, connecting pipeline and cooling pipe. What are the main features of 7.7? TT series governor? (1) adopts a first-stage amplification system. The pilot valve driven by flying pendulum directly controls the actuator relay. (2) The pressure oil is directly supplied by the gear oil pump, and the pressure is kept constant by the overflow valve. The pilot valve has a positive overlapping structure. When not adjusted, the pressure oil is discharged from the safety valve. (3) The power supply of the flying pendulum motor and the oil pump motor is directly supplied by the generator bus terminal or through a special transformer. (4) It has been opened. (1) governor oil must meet the national quality standards. After initial installation or overhaul, run 1~2 months to change the oil, and then change the oil every other year or so, depending on the oil quality. (2) The amount of oil in the fuel tank and buffer should be within the allowable range. (3) The moving parts that cannot be lubricated automatically should be lubricated regularly. (4) Ensure that there is oil lubrication between the rotating sleeve, the outer plug and the fixed sleeve. (5) Before starting the governor after a long-term shutdown, first "jog" the oil pump motor to see if there is any abnormality, and at the same time supply lubricating oil to the pilot valve. Before starting the flying aid motor, move the flying pendulum by hand to check whether there is any jamming phenomenon. (6) The parts on the governor should not be disassembled frequently when unnecessary. However, it should be checked frequently. If abnormal phenomena are found, they should be repaired and eliminated in time. (7) Before starting the oil pump, open the inlet valve of the water pipe of the cooler to prevent the oil from rising too high, which will affect the regulation performance and accelerate the qualitative change of the oil. If the room temperature is low in winter, the water inlet valve (8) of the cooler water pipe should be opened after the oil temperature rises to about 20℃, and the appearance of the governor should always be kept clean. Tools and other items are not allowed on the governor, and other things are not allowed to pile up nearby. So as not to interfere with normal operation. (9) Always keep the environment clean, and pay special attention not to frequently open the shutter observation hole cover on the fuel tank and the plexiglass plate on the flying pendulum cover. (10) In order to protect the pressure gauge from damage, it is generally not advisable to open the cock of the pressure gauge when continuously checking the oil pressure. What are the main components of 9.9? GT series governor? GT series governor is mainly composed of the following parts: (l) centrifugal pendulum and pilot valve; (2) auxiliary relay and main pressure distribution valve; (3) main relay; (4) Instantaneous differential adjustment mechanism-buffer and transmission rod; (5) Permanent differential adjustment mechanism and its transmission lever; (6) local feedback device; (7) speed adjusting mechanism; (8) open. The main features of GT series governors are: (l) This series governors can meet the requirements of automatic regulation and remote control, and can also operate the handwheel of the opening limiting mechanism beside the machine to manually control the oil pressure, so as to meet the requirements of continuous power supply when the automatic regulating mechanism of governors fails. (2) In the structure, the installation needs of various hydraulic turbines are considered. Only the assembly direction of the main pressure distribution valve and the adjustment direction of the permanent and instantaneous pressure difference adjustment mechanism need to be changed. (3) The centrifugal pendulum motor adopts synchronous motor, and its power supply is provided by permanent magnet generator. (4) When the centrifugal pendulum motor loses power supply or other emergencies occur, the emergency stop solenoid valve can be pumped out to directly control the auxiliary servomotor and the main pressure distribution valve, so that the main servomotor can act and quickly close the guide vanes of the hydraulic turbine. (4) .5438+0 1.( 1) The oil used for the governor must meet the national quality standards, and the oil should be changed once a month after the initial installation and overhaul, and then every other year or depending on the oil quality. (2) The oil filter should be inspected and cleaned regularly. You can switch by operating the double oil filter handle, so that you can disassemble and clean without stopping the machine. During the initial installation and operation stage, it should be dismantled and cleaned once a day. After one month, it can be cleaned every three days. After half a year, check and clean regularly according to the situation. (3) The oil in the buffer must be clean and sufficient. (4) All piston parts and nozzles should be oiled regularly. (5) When the unit is tested after installation or before starting after overhaul, in addition to wiping off dust, removing impurities and keeping it clean, all rotating parts should be manually tested first. Look for jammed or loose parts. (6) During the trial operation, if there is any abnormal noise, it shall be handled in time. (7) Generally, it is not allowed to change and remove the structure and components of the governor at will. (8) The speed control cabinet and its surroundings shall be kept clean, sundries and tools shall not be placed on the speed control cabinet, and the front and rear doors shall not be opened at will. (9) Dismantled parts should be marked, and solutions should be found for those that are difficult to dismantle, and random padding is not allowed. (l) Automatic regulating mechanism includes centrifugal pendulum and pilot valve, auxiliary relay and main pressure distribution valve, generator relay, instantaneous differential regulating mechanism, buffer and its conversion lever, accelerating device and its conversion lever, local feedback regulating mechanism and its conversion lever and oil circuit system. (2) The control mechanism includes an opening limiting mechanism and a speed changing mechanism. (3) The protection device includes the opening limit mechanism, the travel limit switch of the speed change mechanism, the emergency stop solenoid valve and the pressure signal. Safety valve, spindle locking device of servo motor. (4) Monitoring instruments and other indicator boards, including opening limiting mechanism, speed changing mechanism and constant difference adjusting mechanism, electric revolution indicator, pressure gauge, oil filter, oil pipeline and its accessories and circuits. (5) Oil pressure equipment includes oil return tank, pressure oil tank, oil filter valve, screw oil pump, check valve and stop valve.