作者：戚天博1,2, 王楠1,2, 杨利涛1,2
作者单位：1. 陕西理工大学机械工程学院，陕西 汉中 723001;
2. 陕西省工业自动化重点实验室，陕西 汉中 723001
关键词：水润滑轴承;水膜压力;无线监测;能量收集方法
摘要：
针对水润滑轴承水膜压力无线监测节点的供电问题，提出一种旋转能量收集方法并设计能量收集装置。旋转能量收集方法应用永磁发电机将转轴旋转产生的机械能转化为电能，并由能量收集装置（整流、降压、充电管理电路与锂电池）将电能进行转换与存储后为节点在线供电。首先对能量收集装置中的各电路进行仿真，然后建立节点能量模型并对节点能耗进行分析，最后进行旋转能量收集试验。研究结果表明：轴转速是影响能量收集效果的主要因素，转速为1200 r/min时，锂电池充电时间低于节点工作时间，充电过程中电池电能逐渐变大，电压逐渐上升，但进入恒压阶段后充电功率逐渐降低，转速1200 r/min比1000 r/min条件下充电效果更加显著。
Research on power supply methods for wireless monitoring node of water-film pressure in water-lubricated bearing
QI Tianbo1,2, WANG Nan1,2, YANG Litao1,2
1. School of Mechanical Engineering, Shaanxi University of Science and Technology, Hanzhong 723001, China;
2. Shaanxi Key Laboratory of Industrial Automation, Hanzhong 723001, China
Abstract: Aiming at the electric power supply problem of wireless monitoring node for water film pressure of water lubricated bearing, a rotating energy collection method had been proposed, and an energy collection device had been designed. The rotating energy collection used the permanent magnet generator to convert the mechanical energy, which was generated by rotating shaft, into electrical energy. The energy was converted and stored by the energy collection device (rectifier, buck, charging management circuit and lithium battery) to supply power for the node. Firstly, simulating the circuit of the energy collection device, and then establishing the node energy model to analyse the energy consumption of the node. Finally, carrying out the rotating energy collection tests. The results show that the shaft speed is the main factor that influences the energy collection effect, which brings a fact that when the rotate speed is 1200 r/min, the charging time of the lithium battery is lower than the working time of the node. During the charging process, the battery power gradually increases and the voltage rises, but the charging power decreases after entering the constant voltage stage. The charging effect under the condition speed of 1200 r/min is more significant than that of 1000 r/min.
Keywords: water-lubricated bearing;water film pressure;wireless monitoring;energy collection method
2021, 47(2):13-18 收稿日期: 2020-07-12;收到修改稿日期: 2020-09-24
基金项目: 国家自然科学基金项目(51605269)；陕西省高校青年杰出人才支持计划(SLGQD1802)
作者简介: 戚天博(1994-),男,陕西西安市人,硕士研究生,专业方向为机电设备监测与控制
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