Technical Service – Press Section
技术支持–压榨部
•Press felt moisture profile 毛布水份曲线
•Press felt water permeability profile 毛布透水度曲线
•Press section dewatering analysis 压榨部脱水分析
•Air Flow measurement at Uhle box 真空吸水箱抽气速度
•Felt caliper measurement 毛布厚度测量
•Press felt conditioning system check 毛布清洗调整系统检查
•Press felt running size measurement 毛布运行尺寸测量
•Press section vibration survey (Supported through VFIP)振动测试
•Data Collection & Trend Analysis 数据采集和趋势分析
•Observations and Comments 观察和评价
•Discussion with Machine Crew & Manager 与纸机经理和员工的探讨
•Felt Moisture Profile毛布水份曲线
•Usually cross measurements are performed before and after each press nip (If possible) on the same side of felt
•It can be used To provide water balances around the felt loop
•To identify the source of cross profile variation
•用以分析毛布脱水效率,分析水份波动原因
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Felt Permeability Meter 毛布透水度测试仪
Felt Permeability Meter 毛布透水度测试仪
Felt Permeability Profile
毛布透水度曲线
An important factor is the hydraulic flow resistance in the press nip. A filled felt restricts water migration from the nip and reduces water removal efficiency.
透水度是指示毛布在压区水流阻力的重要参数。
堵塞的毛布将限制压区脱水降低脱水效率
It can be used to predict performance, monitor felt cleaning, and schedule clothing changes.
透水度可用于预测毛布运行性能，安排适时更换毛布
水分曲线和透水度曲线的解读
压辊中高过高
压辊中高不足
水分曲线和透水度曲线的解读
压榨部两端压力不一，操作侧偏轻
高压喷淋水摆动行程与喷嘴间距不匹配
震动曲线反映传动侧问题
纵向震动曲线与毛布运行周期匹配反映毛布质量问题
毛布横幅不均污染，局部严重
个别高压喷淋水喷头堵塞，局部严重污染
毛布局部压实（湿燃）完全不脱水
毛布局部严重磨损
Uele Box Vacuum – Poddymeter 真空吸水箱真空度测量
An indicator of the degree of felt openness Normal level - 15kPa to 50kPa
真空吸水箱真空度是毛布清洁开放程度的直观指示
100200300400500600700800
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Running Life (Days)
E c o -
F l o w D e w a t e r i n g (l /m i n )
Average 891 l/min
Tradeline Distortion 毛布标准线变形
Any distortion of the trade-line means a similar distortion in the weave which can cause the fabric to close up non-uniformly.
标准线的变形指示毛布结构的变形，影响毛布的均一性
A trade-line that is off 30cm or more for each 2.5m of fabric width changes permeability characteristics. Distortion of this magnitude may influence water removal, rate of filling with foreign material, fabric and sheet moisture profile, and fabric stability.
毛布每2.5m宽度标准线变形超过30cm将改变透气度，影响横幅脱水，杂质填充，影响纸页横幅水分，影响毛布稳定性
Speed Draw 速差The speed difference Wire~1P, 1P~2P, 2P~1D, Wire ~ Reel, etc.
The wetter the sheet, the higher the speed draw
纸页水分越高，速差越大
The higher press loading, the higher the speed draw
线压力越高，速差越大。