Design And Research On The Power Generation Device Acquiring Vibration Energy For Railway Cars Based On Double Slider-crank Mechanism

Since 2018,China has implemented the "Three-Year Action to Defend the Blue Sky" to adjust the transportation structure and increase railway traffic.It is of great significance to serve the high-quality development of the economy and reduce pollution environmental pollutant emissions,especially to win the blue sky defense.In 2020,the national railways delivered 3.58 billion tons of cargo,with an average daily loading of 161,000 vehicles,respectively increasing 12.2%and 14.1%from the 3.19 billion tons and 149,000 vehicles in 2018.With the rapid increase in the number of vehicles loaded,the high-speed operation of freight cars puts high demands on the safety of freight cars.At this stage,the electronic equipment of railway freight cars is mainly powered by batteries.Battery replacement and charging management is extremely tedious,and prone to mistakes,leading to safety risks.Therefore,research on power generation device acquiring vibration energy is carried out in this paper.The power generation device scheme based on the double slider-crank mechanism converts the mechanical energy generated by the operation of the railway freight car into electric energy and stores it,and supplies power to the electronic equipment on the railway freight car.Various on-board monitoring devices can be used normally,so as to obtain various data when the truck is running,and ensure the safety of the railway freight car.First of all,we read related literature and compare the advantages and disadvantages of the three power generation devices:electrostatic power generation device,piezoelectric power generation device and electromagnetic power generation device.Aiming at the application status of the transportation industry,a new type of power generation device based on a oneway overrunning clutch and a double slider-crank mechanical rectifier mechanism are designed in the paper.The structure of the power generation device is designed with a modular design idea,including suspension vibration energy input module,transmission module,generators module and energy storage module.Secondly,the kinematics and dynamics analysis of the power generation device based on the double slider-crank mechanism is carried out.The kinematics and dynamics mathematical model of the power generation device based on the double slider-crank mechanism is established,and the indicator characteristics and power output characteristics of the new power generation device are analyzed.By using Solidworks modeling software and Matlab/Simulink mathematical simulation software,three-dimensional modeling simulation and sinusoidal excitation simulation analysis are carried out.Finally,the MTS electro-hydraulic servo fatigue test platform was used to test the prototype of the power generation device based on the double slider-crank mechanism.According to the test data,the damping coefficient,indicator characteristics and power generation characteristics of the system are analyzed,and the simulation results are verified.Studies have shown that the power generation device based on the double-crank slider mechanism proposed in this paper has achieved the expected effect.It can not only meet the damping and vibration reduction requirements of railway freight cars,but also effectively acquire the vertical vibration energy of the freight car bogies.The research in this paper provides a new solution for the power supply of on-board monitoring device in railway freight cars.