Research On Key Technologies Of Ship Propeller Static Balance Detection System

As the core component of ship navigation power,marine propeller is very important in ship power system.Its manufacturing accuracy is directly related to the propulsion efficiency and service life of the ship,and the overall performance of the ship will be directly affected by the static balance characteristics of its propeller.Therefore,the detection and processing of propeller static balance is essential and crucial in the manufacturing process of marine propeller.At present,most domestic enterprises adopt vertical static balance detection method.Due to the large mass and volume of ship propeller,this detection device still adopts manual counterweight method,which is inconvenient to operate,and the detection accuracy and efficiency are low.Secondly it is prone to core shaft deformation when detecting large tonnage propeller.Based on the full investigation and analysis of the use and demand of enterprises,and combined with the research status of propeller static balance detection technology at home and abroad,this thesis designs a new type of ship propeller static balance detection system.The main research contents of this thesis are as follows:(1)According to the design goal,the static balance detection system of ship propeller is studied,the overall structure design is completed,and the corresponding research and design work is carried out on the key mechanism.In the design of hydraulic system,the overall hydraulic circuit is designed to complete the hydraulic principle design and the calculation and selection of key hydraulic components.(2)The synchronous control of the weighing mechanism is studied,the hydraulic system design of the weighing mechanism is completed,and the control algorithm is studied.By AMESim and Simulink co-simulation,compared with Proportional、Integral、Differential(PID)and fuzzy PID algorithm,the accuracy of synchronous control is realized.(3)Combined with the working principle of the design scheme,a new static balance detection algorithm is studied.In order to improve the positioning accuracy of the system,the calibration process is designed to reduce the structural installation error.The detection accuracy is improved by measuring the propeller gravity coordinate.Finally,the unbalanced mass decomposition algorithm is proposed and the data processing results are summarized.(4)The control system of ship propeller static balance detection system is studied.By sorting out the control objects,dividing the control system steps,determining the controller type,and completing the design of the control system scheme,including the selection of the control system hardware,the I/O distribution of PLC,the hardware circuit connection and the overall wiring design.At the same time,the system software is developed,and the software module design,communication mode design and software interface design are completed.The realization of key functions of the system software is studied,and the specific example programming is given.