【Q&A Question 079】March 20, 2017
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This post was last edited by 955559 on 2017-7-21 at 22:31. [Q&A Question No. 079] What is the function of the secondary oil damper in the control system of a steam turbine? 2017.03.20 The reference answers will be visible after responding; scoring is granted by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) 1. To reduce the impact of large fluctuations in the secondary oil pressure on the actuator of the control valve, thereby preventing large amplitude variations. 2. By means of the throttling effect of the damping device, the intensity of changes in the secondary oil pressure is reduced, allowing for smoother operation of the turbine. 3. During shutdown, the secondary oil pressure is quickly released by the damping device pushing aside the steel balls, thus enabling rapid shutdown. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Third Phase of Haichuan’s Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemicals Forum)
Pressure fluctuations or oscillations that occur in the secondary oil circuit are attenuated through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such pressure fluctuations from being transmitted to the throttle spool of the hydraulic motor
The damper is installed on the secondary oil pipeline near the oil motor, and several grooves perpendicular to the flow channel are provided on the damper body. Thus, pressure fluctuations or oscillations that occur in the secondary oil circuit are damped through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such fluctuations from being transmitted to the throttle spool of the hydraulic motor.
The damper is installed on the secondary oil pipe near the oil motor, and several grooves perpendicular to the flow channel holes are provided on the damper body. Thus, pressure fluctuations or oscillations that occur in the secondary oil circuit are damped through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such fluctuations from being transmitted to the throttle spool of the hydraulic motor.
The damper is installed on the secondary oil pipeline near the oil motor, and slots perpendicular to the flow channel holes are provided in the damper. When pressure fluctuations or oscillations in the secondary oil circuit are attenuated through the labyrinthine flow channels formed by the holes and grooves in the damping element, this prevents such pressure fluctuations from reaching the throttle spool of the hydraulic motor.
It ensures the stability of the secondary oil pressure; in the event of a disruption in the secondary oil supply, it maintains a certain pressure that acts on the hydraulic actuator to close the quick-shut valve!
When pressure fluctuations or oscillations occur in the secondary oil circuit, they are damped through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such pressure fluctuations from being transmitted to the throttle spool of the hydraulic motor.
1. It reduces the impact of large fluctuations in secondary oil pressure on the actuator of the control valve, thereby preventing large swings. 2. Through the throttling effect of the damping device, the intensity of changes in secondary oil pressure is reduced, allowing for smoother operation of the turbine. 3. During shutdown, the secondary oil pressure is quickly released by the damping device pushing aside the steel balls, thus enabling rapid shutdown.
Pressure fluctuations or oscillations that occur in the secondary oil circuit are attenuated through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such pressure fluctuations from being transmitted to the throttle spool of the hydraulic motor
The damper is installed on the secondary oil pipeline near the oil motor, and slots perpendicular to the flow channel holes are provided in the damper. Thus, pressure fluctuations or oscillations that occur in the secondary oil circuit are attenuated through the labyrinthine flow channels formed by the holes and grooves in the damping element, thereby preventing such pressure fluctuations from being transmitted to the throttle spool of the hydraulic motor.
Speed sensing mechanism: It detects changes in the turbine speed and converts them into signals representing changes in displacement or oil pressure, which are then sent to the transmission amplification mechanism. Based on their principle, they are divided into three main categories: mechanical, hydraulic, and electronic.