Development And Uniform Loading Characteristics Study On High-torque Loading Device Of Closed Test System

In recent years, with the rapid development of the shipbuilding industry, China’s shipbuildingindustry has entered a rapid development stage, it has had the capabilities of the design on thebulk carriers,oil tankers, container ships ship’s,in this context,the new high power marinereducer may be developed, with in-depth study on the marine reducer transmission technology.Adapted closed-test system usually is designed in order to assess the performance of the newhigh power marine reducer, it can simulate the conditions of the high-speed and heavyload.The research of the high-torque loading device is particularly important because it is themost important components of the closed-test system. The dissertation is the project of theChina Shipbuilding Industry Corporation,carry out applied research the high-torque loadingdevice, and develop a new series-in high-torque loading device, to provide technicalassurance of building the marine reducer closed-test system.Paper reviews the development of domestic and international profile loading devicetechnology. On this paper, the focus of the experimental mechanical torque loading devicetechnology research and development status were analyzed.A new loading device technologywas proposed, based on the comparative analysis of the advantages and disadvantages.With the in-depth analysis of the load characteristics of the closed-test system, andaccording to the technical specifications of the project, proposed the design of the loadingdevice drive transmission technology, build a three-dimensional model of transmission.Describes the loading process, and makes the finite element analysis of the key components,and the dynamic parameters, and anti-process self-locking, and energy consumption werestudied. Verify the design feasibility by the stability test.According to the analysis of the planetary gear transmission internal excitation, study theinternal time-varying mesh stiffness, and derive the time-varying mesh stiffness formula.Analyze the incentives of the system incentives installation error and manufacturing error, anddetermine error excitation function of the gear mesh, and give the error excitation formula,and lay the foundation for determine the internal excitation forces.Paper derive the meshing pair relative displacement in the meshing line based on theanalysis of planetary gear transmission elastic deformation, and establish the sun gear, planetary gear, planet carrier and ring gear sub-structural dynamics model by the dynamicsub-structural modeling method. Establish the translational-twist coupling dynamics model byusing of the relative displacement conditions, with considering the time-varying meshstiffness, integrated error of gear tooth contact, the bearing support stiffness and the otherfactors, and give the vector expressions. Derive the equations of the free vibration motion onthe basis of differential equations of motion, make the foundation for the analysis of thedynamic loading characteristics.Calculate the system’s static and dynamic loading coefficient by using Fourier solutionmethod, and analyze the influence trend of the gear manufacturing error and installation errorand the meshing stiffness and support stiffness on the static and dynamic loading coefficient.Determine the main characteristics, and provide the theoretical basis for improving uniformloading characteristics.Design loading device control system based on the wireless communications by usingthe hierarchical control,and designe two subsystems of the real-time detection loading andexternal control panel. Each subsystem is divided into the corresponding function modules, tocontrol the loading device, detect and display the operational information.Using two-sided balance method to improve the balance quality level loading device bythe experiment, and determine the ideal loading area. Verify the performance of the loadingdevice making any loading angle by the angle detection experiments.Verify the accuracy ofthe loading torque by static loading testing, and verify the accuracy of the loading torque onthe conditions of different speeds by dynamic loading testing.