Abstract
A mathematical model and simulation analysis on main control valve mechanism of LNG ship steam turbine are carried out. A reasonable modeling division of main control valve mechanism is achieved in accordance with the idea of modular modeling, and all the models are established respectively. The modeling division includes cam lifting mechanism, oil actuator and double-valve body. The state space equations are used successfully to describe the servo system of main hydraulic valves and to reveal their dynamic process. Finally, the simulation modules are combined according to the structure and function of main control valve mechanism in Matlab/Simulink environment. By comparing experimental data and calculated data, the simulation results meet the accuracy requirements.
Highlights
LNG ship steam power plant is very different from the traditional ship diesel engine in control and manipulation
This paper takes some research on modeling and simulation about steam turbine main control valve hydraulic servo mechanism of LNG ship including cam lifting gear, oil actuator, doublevalve and the flow characteristics for main control valve to reveal the dynamic characteristics, static characteristics and operation rules of steam turbines in the regulation process
The steam turbine main control valve is a key equipment to achieve the manipulation for LNG ship main propulsion plant, its basic components are shown in Fig. (1), including the cam angle signal box, cam gear, lifting lever mechanism, pilot valve, oil actuator, open valve lever and double-valve body
Summary
LNG ship steam power plant is very different from the traditional ship diesel engine in control and manipulation. The modeling and simulation research work on relevant power of its institutions and propulsion control system need to be carried out urgently. This paper takes some research on modeling and simulation about steam turbine main control valve hydraulic servo mechanism of LNG ship including cam lifting gear, oil actuator, doublevalve and the flow characteristics for main control valve to reveal the dynamic characteristics, static characteristics and operation rules of steam turbines in the regulation process. 2. REGULATION PRINCIPLE OF STEAM TURBINE MAIN CONTROL VALVE HYDRAULIC SERVO MECHANISM. The steam turbine main control valve is a key equipment to achieve the manipulation for LNG ship main propulsion plant, its basic components are shown in Fig. (1), including the cam angle signal box, cam gear, lifting lever mechanism, pilot valve, oil actuator (servo cylinder), open valve lever and double-valve body (ahead valve and astern valve). When the servo motor drives the cam to turn a certain clockwise angle, the lifting lever moves up and drives the
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
