The role of generator governor
The electronic governor is used to keep the speed of the diesel engine stable. In the process of the load change of the diesel engine, its speed is changed accordingly. When the speed decreases, if the governor is not adjusted, the diesel engine will eventually stop; when the speed increases, if the governor is not adjusted, the diesel engine will eventually be unable to withstand the excessive centrifugal force and be damaged. The role of governor is to keep the speed of diesel engine stable. In addition, the governor can also maintain the minimum speed and maximum speed of the diesel engine to prevent stalling when running at low speed and mechanical damage caused by flying when running at high speed.
The role of generator governor in power-frequency regulation?
The role of the generator governor in the generator power-frequency adjustment is: when the system frequency changes, within the technical conditions of the generator set, automatically change the steam intake of the turbine or water intake of the turbine, so as to increase or decrease the output of the generator (this reflects the relationship between the change in frequency and the change in output of the generator set, called the frequency static characteristics of the generator speed control system), and the system frequency is adjusted with a difference. Automatic adjustment of system frequency.
What are the common faults of generator governor and how to solve them?
Generator governor is an important accessory for generators, governor failure when there are mainly the following most common situations, we briefly introduced, generator tuning corresponding to the exclusion method.
Flying car (speed regulation of its sudden failure, so that the speed exceeds the calibrated speed of more than 110%)
(1) the speed is too high
Elimination method: should be immediately emergency stop, disconnect the fuel to stop the oil or cut off the air intake and other measures to make the diesel engine stop
2）Adjusting gear lever or throttle lever jammed
Removal method: check the parts, disassemble the high-speed restriction screw seal after re-adjusting the seal
(3) adjust the gear rod and tie rod connection pin off
Exclusion method: Overhaul
4) Tie rod screw off
Removal method: Reinstall or replace
(5) Tie rod screw off
Exclusion method: Reinstall or replace
6）The speed control spring is broken
Removal method: Reassemble or replace
7）Speed control spring is broken
Exclusion method: Reassemble or replace
(8) adjust the gear rod and tie rod connection pin off
Removal method: repair
How to adjust the generator governor?
Generator governor is mainly for the adjustment of the closing voltage and the adjustment of the regulation value.
1, the closing voltage adjustment
Use battery (12v), ammeter in series, connected to the battery terminals on the governor. Start the generator accessories and gradually increase the speed, in the interceptor contact closure to observe the tractor on the ammeter pointer. If the ammeter pointer to “+” direction swing, said the closure voltage is high, should reduce the spring tension; If the ammeter pointer to “-” direction swing, said the closure voltage is low, should increase the spring tension. So repeatedly adjust until the interceptor contact closure when the ammeter pointer is almost not swing, then the closing voltage is appropriate.
2, the generator governor voltage adjustment value
Use two dry cell batteries and batteries, ammeter in series, connected to the battery terminals in the governor. Start the engine, gradually increase the speed. When the regulator is working, observe the ammeter pointer. If the ammeter pointer to “+” direction swing, that the regulator value is high, should reduce the spring tension; If the ammeter pointer to “-” direction swing, that the regulator value is low, should increase the spring tension. This repeatedly adjusted until the regulator works, the ammeter pointer is almost not swinging, it means that the regulator value is appropriate.
The principle of the generator regulator adjustment method：
Dry cell and battery in series, there is a certain potential, and the generator is issued a certain voltage, when the two are not equal to produce current. The former potential is higher than the latter, the ammeter pointer to the “-” direction, and vice versa to the “+” direction. Only when the two potentials are almost equal, the ammeter pointer does not swing.
Why does the governor affect the parallel operation of the generator? How to deal with it?
Answer : The generator governor does not affect the merging work during the merging process, but will affect the distribution of the system load after the merging. The generator set with hard characteristics will bear a larger load, and it is possible that the The softer unit has not reached the rated load, while the unit with harder characteristics has been overloaded; the solution is to adjust the regulators of the original engines of each generator set to make their characteristics as close as possible.