Steam turbine is a common kind of mechanical equipment, generally speaking, equipment speed control system for operation has an important role. Therefore, we need to focus on this aspect in production.
1. improve the static characteristics of the speed control system, so that it meets the requirements. Mainly make speed variation rate and delay rate qualified.
2. Eliminate the intightness of the steam regulating valve. If the steam valve is not strict, it will cause the overspeed after the load rejection of the unit.
3. shorten the distance from the exhaust port to the exhaust check door, reduce the middle volume, but also eliminate the tightness of the check door.
4. Increase the flow area of the wrong throttle, increase the oil intake and improve the closing speed of the oil motor.
5. for the intermediate reheat type unit, due to the short speed rise time, the intermediate volume time constant is large, so in order to improve the dynamic quality of the speed control system, can be set in the speed control system differentiator and electric accelerator device, in order to limit the overspeed after the load rejection.
The above is the main content of how to adjust the speed control system of the steam turbine. When the equipment is running, the speed is different according to different needs.
