摘要
基于盘式磨浆机磨浆间隙测控的纤维级，精确性、实时性的需要，讨论了磨浆盘齿结构与运行间隙的特点；研究了电涡流传感器用于直接测量盘式磨浆机磨浆间隙的安装边界效应、探头的缩进效应，输出特性及其最佳特性曲线拟合方程，测量仪表的原理与间隙对应的数据算法及标度变换。研究表明，传感器安装在盘周边界应大于3mm；对于通常盘片磨齿尺寸为齿高2～7mm、齿宽2．4-4．5mm、槽宽1．5-4．0mm的盘式磨浆机，选用直径Ф11mm、灵敏度2V／mm、线性范围5mm的电涡流传感器动态测量磨浆间隙较宜；进退盘时传感器输出特性重现性好；不同浆种、不同浓度与流量对输出电压测量与示值稳定可靠。
Based on the need for precise, fiber-scale and on-fine measure of disc refiner＇s refining gap （DRRG） in papermaking industry, the characteristics of structure and refining gap of disc refiner were firstly discussed; and a new method with Eddy Current Sensor （ECS）, of on-fine, precise and direct measurement of DRRG was studied systematically and for the first time, including ECS＇s fixing edge and indent effect, ECS＇s Response Characteristics （RC） and the optimized linearity characteristic regression equation, the measuring principle and DRRG data process, as well as the display instrument＇s scale transformation. The followings were indicated ： ECS＇s fixing edge is no less than 3mm; the ECS with diameter of Фllmm, sensitivity of 2 V/mm and linearity of 5mm is fit to DRRG measurement for the refining disc with, as a rule, tooth height of 2 -7mm, tooth width of 2.4 -4. 5mm and groove width of 1.5 -4. 0 mm; ECS＇s RC recurs very well while rotating disc advances and retreats ; ECS＇s RC is not relative to the kind, consistence, and flux of pulp, which makes for measurement dependability.
出处
《中国造纸学报》
CAS
CSCD
2008年第1期85-89,共5页
Transactions of China Pulp and Paper
基金
华南理工大学制浆造纸工程国家重点实验室资助项目(编号:200539)
关键词
盘式磨浆机
电涡流传感器
齿盘间隙
在线测量
特性曲线
标度变换
disc refiner
eddy current sensor
refining gap
on-line measurement
response curve
scale transformation
