基于液压系统的风机叶片液压自调角系统  

Hydraulic self-adjusting angle system of fan blades based on hydraulic system

作　　者：赵倩 郭德鹏 陈建平[1,2] 朱恩龙 郝亮[1,2] ZHAO Qian;GUO De-peng;CHEN Jian-ping;ZHU En-long;HAO Liang(College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300222,China;Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry&Food Machinery and Equipment,Tianjin 300222,China)

机构地区：[1]天津科技大学机械工程学院,天津300222 [2]天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津300222

出　　处：《机电工程》2023年第1期76-82,共7页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51975411)。

摘　　要：为确保冷却塔循环水系统安全可靠地运行,冷却塔风机转速以及叶片安装角度均按照最大换热量设定。但受生产工艺、环境温度等相关因素的影响,冷却塔风机的换热量在时刻变化,因此,冷却塔风机冷却能力与实际需求不匹配,造成大量能源浪费,为此,提出了一种基于液压系统的冷却塔风机叶片自调角的新型节能方法。首先,对自调角系统的工作原理进行了分析,利用Solidworks软件对自调角机构进行了结构设计,并对液压驱动系统工作原理进行了分析;然后,借助风力机气动载荷的计算方法,得到了液压系统提供的驱动力随安装角度变化的曲线;最后,利用AMESim仿真软件探究了多种液压回路自调角的工作特性,分析了调速阀内部元件节流阀开度对液压回路稳定性的影响。研究结果表明:自调角装置可以实现风机在不停机的工况下调节叶片的安装角度;采用PID调速阀液压回路可提高系统工作的精度和稳定性;当调速阀内部节流口的开度K=0.08时,可有效减少振荡时间,减小振荡峰值。In order to ensure the safe and reliable operation of the circulating water system of the cooling tower,the fan speed and blade installation angle of the cooling tower were set according to the maximum heat exchange.However,due to the influence of production process,ambient temperature and other related factors,the heat exchange of the cooling tower fan changes from time to time.Therefore,the cooling capacity of the cooling tower fan does not match the actual demand,resulting in a large amount of energy waste,therefore a new energy saving scheme based on the self-adjustment of the cooling tower fan blade based on the hydraulic system was proposed.Firstly,the working principle of the self-adjusting angle system was analyzed,and the structure of the self-adjusting angle mechanism was designed by using Solidworks software,and the working principle of the hydraulic drive system was analyzed.Then,the curve of the driving force provided by the hydraulic system with the change of installation angle was obtained by the method of calculating the aerodynamic load of the wind turbine.Finally,AMESim was used to explore the working characteristics of self-adjusting angle of various hydraulic circuits,and the influence of throttle valve opening on the stability of hydraulic circuits was analyzed.The research results show that the device can adjust the blade installation angle of the fan without stopping the machine.The PID speed regulating valve hydraulic circuit improves the accuracy and stability of the system.When the speed regulating valve internal throttle opening K equals 0.08,it can effectively reduce the shock time,and reduce the shock peak.

关 键 词：轴流风机 节能方法 液压系统驱动力 自调角装置 调速阀 节流阀开度 液压回路稳定性 载荷分析 

分 类 号：TH43[机械工程—机械制造及自动化] TH137.5[电气工程—电力系统及自动化] TM621