摘要
为解决离心调速器运行存在反复振荡、摩擦片易发热烧损等问题,将液压启闭机速度控制原理运用于快速卷扬式启闭机,采用液压阻尼调速器改进卷扬式启闭机的调速装置,论述液压阻尼调速器速度控制原理,建立调速器流体力学模型,推导流量及阻尼力矩计算公式.对QPK-2×160kN卷扬式启闭机安装2种调速器进行试验分析,结果表明:流量控制主要与阻尼孔的直径有关,阻尼力矩与阻尼孔面积的平方成反比例关系;阻尼力矩随阻尼器输入角速度的增大而增大;采用液压阻尼调速器具有良好的阻尼特性,能吸收负载振动、冲击,缩小扭矩和转速振荡的时间和范围,仅需经过2～3次振荡吸收便可实现扭矩平衡,防止设备共振,改善系统平顺性和稳定性,增加启闭机可靠性,使闸门能够匀速下降,延长其使用寿命,扩大快速卷扬式启闭机使用范围.
In order to solve repeated oscillations,heating and burning of friction plates in the operation of centrifugal governor,applying the speed control principle of hydraulic hoist to rapid winch-hoist,hydraulic damping governor is adopted to improve the winch-hoist governor.In this paper,the speed control principle of damping governor is expounded;and a fluid mechanics model of governor is established;flow and damping moment calculation formulae are deduced.The experiment results of QPK-2×160 kN type rapid winch-hoists,equipped with two different governors,were analyzed.The results show that fluid control is mainly related to the diameter of the damper;the damping moment is inversely proportional to the square of the damper area;the damping moment increases as the angular speed of the damper increases.The hydraulic damping governor has a good damping characteristics,which can absorb load vibration,impact,reduce moment and reduce time and range of the speed surging.Only moment balance can be achieved after 2-3 oscillation absorptions.The results also show that hydraulic damper governor can prevent equipment resonance,improve system smoothness and stability,enhance the hoist reliability of winch-hoist system,make gate descend at an even speed and prolong its service life,thus extend the application scope of rapid winch-hoist.
出处
《排灌机械工程学报》
EI
北大核心
2013年第6期506-510,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
江苏省水利科技重点资助项目(2011072
2012028)
