under hydraulics ppt模板
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过滤基础
砂滤池的滤料规格及运行设计参数
类 别 粒径(mm) 单层石英 砂滤料 双层滤料 dmax＝1.2 dmin＝0.5 无烟煤 dmax＝1.8 dmin＝0.8 石英砂 dmax＝1.2 dmin＝0.5 无烟煤 dmax＝1.6 dmin＝0.8 石英砂 dmax＝0.8 dmin＝0.5 重质矿石 dmax＝0.5 dmin＝0.25 滤料组成 不均匀系数 K80 <2.0 <2.0 <2.0 厚度(mm) 700 300-400 400 8-10 10-14 滤速(m/h) 强制滤速 (m/h) 10-14 14-18
过滤
Granular Medium Filtration
饮用水处理过滤过程 过滤的作用、 快滤池结构、 快滤池的运行和反冲洗
过 滤
饮用水处理过滤原理 Operation of filters Hydraulics of flow through granular media Particle removal in rapid filtration
过滤理论
滤层结构
•单层滤池通常以石英砂(sand)做为滤料。 •双层滤池是在石英砂滤料的上面再放一层 粒度比较粗的无烟煤(anthracite)。 •三层滤池是在双层滤池的基础上再在石英 砂滤料的下面放一层粒度更细、比重更大 的滤料，一般用磁铁矿(magnetite)。
过滤理论
单层滤池的滤料层结构
• 过滤过程是原水由 上到下通过一定厚 度的由一定粒度的 粒状介质组成的床 层，由于粒状介质 之间存在大小不同 的孔隙，废水中的 悬浮物被这些孔隙 截留而除去。
原水
滤料
过滤水
• 到一定程度时过滤不 能进行，需要进行反 洗。反洗是通过上升 水流的作用使滤料呈 悬浮状态，滤料间的 孔隙变大，污染物随 水流带走，反洗完成 后再进行过滤。所以 深层过滤过程是间断 进行的。
Unit 10 Hydraulic System
Unit 10 Hydraulic System10单元液压系统The history of hydraulic power is a long one，dating from man’s prehistoric efforts to harness the energy in the world around him．The only sources readily available were thewater and the wind—two free and moving streams.液压动力的历史由来已久，始于人类为利用他周围的能源而作出的努力。
来源只有现成的水和风—两种自由移动流。
The watermill，the first hydraulic motor，was an early invention·One is pictured on a mosaic at the Great Palace in Byzantium，dating from the early fifth century·The mill had been built by the Romans．But the first record of a watermill goes back even further, to around 100 BC，and the origins may indeed have been much earlier·The domestication of grain began some 5000 years before and some enterprising farmer is bound to have becometired of pounding or grinding the grain by hand．Perhaps，in fact，the inventor was some farmer’s wife，since she often drew the heavy jobs·水车，第一台液压马达，是一种早期的发明。
《液体压强》人教版八年级初二物理下册PPT课件
PA=PB=PC， ＦA＞ＦB＞ＦC，
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人教版物理八年级下册（初中）
第九章 压强
感谢各位的聆听
MENTAL HEALTH COUNSELING PPT
讲解人：办公资源 时间：2020.5.20
皮膜将 ( B )
A．逐渐下凸
B．逐渐上凸
C．保持不变 D．不好判断．
分析:由于液体内部各方向都有压强，玻璃筒插入水中时，下端 橡皮膜应受到向上的压强作用，而且越向下时，压强越大．
课堂练习
2、 杯子中装有120g水，水深10cm，当杯子底面积为10cm2时，杯子 底受到压强为多少？杯子底受到压力为多少？
四、解释生活中的现象
带鱼生活在深海中。为什么我们在鱼市上看不到活带鱼？
四、解释生活中的现象
工程师们为什么要把拦河坝设计成下宽上窄的形状? 液体内部的压强随深度的增加而增大，下部较宽的大 坝能承受更大的压强。上部较窄的大坝既能承受压强 又能节省材料。
五、连通器 1、定义：上端开口、下端连通的容器
二、液体内部压强的特点
Chapter2Lesson3PPT课件
可变容积液压系统包含有为了适应不同需要而改变输出的 泵。可将机械控制，电流控制，和气压控制组合起来控制 油的流量。可变容积液压系统通常不需要设置溢流阀和流 量控制阀，这些部件通常是恒定容积液压系统所需要的。 可变容积液压系统被广泛用在输出功率和速度变化较大的 机械设备中。
2020/10/13
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谢谢您的指导
2020/10/13
3
Lesson 3 The Hydraulic System
1. however, when it becomes necessary to vary speeds, motions, etc., in a fixed or variable sequence, the complexity of the system increases. The most complex system still contains the basic components found on a simple system. Two types of hydraulic systems, the constant volume and the variable volume, are generally used.
恒定容积液压系统包含具有固定输出的泵。泵一直随着机
2020/1器0/13 的运作而运作。
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Lesson 3 The Hydraulic System
3. Variable-volume systems contain pumps whose output can be varied to suit different requirements. Combinations of mechanical, electrical, and pneumatic controls may be used to regulate the flow of oil. Variablevolume systems generally do not require certain bypass and flow-control valves, which are needed in a constant volume system. Variable-volume systems are widely used when the output power and speed vary over a wide range.
2020/10/13
5
谢谢您的指导
2020/10/13
3
Lesson 3 The Hydraulic System
1. however, when it becomes necessary to vary speeds, motions, etc., in a fixed or variable sequence, the complexity of the system increases. The most complex system still contains the basic components found on a simple system. Two types of hydraulic systems, the constant volume and the variable volume, are generally used.
恒定容积液压系统包含具有固定输出的泵。泵一直随着机
2020/1器0/13 的运作而运作。
4
Lesson 3 The Hydraulic System
3. Variable-volume systems contain pumps whose output can be varied to suit different requirements. Combinations of mechanical, electrical, and pneumatic controls may be used to regulate the flow of oil. Variablevolume systems generally do not require certain bypass and flow-control valves, which are needed in a constant volume system. Variable-volume systems are widely used when the output power and speed vary over a wide range.
英文河流动力学水力学文献综述展示PPT
The real scale for each cross as in Moring (2002) has been calculated in Auto-CAD (Automated Computer Aided Design) to allow the top width of the cross section to be equal to its measured value (W), and the sum of the area of the different rectangles and trapezoids is equal to the product of the average depth and the width.
Under this condition, the calculated average deposition volume is about 7.17 m3 in Santa Elena reach and 16.2m3 in Johnson Ranch reach. The total sedimentation volume predicted from model is 8.36 m3 for Santa Elena reach and14.54 m3 for Johnson Ranch reach. The difference between model and field measurements are 1.19 m3 and 1.66 m3 and the errors are 14% and 11%, respectively. The comparison indicates the model has a reasonable agreement with the field measurements under the limited data availability.
Under this condition, the calculated average deposition volume is about 7.17 m3 in Santa Elena reach and 16.2m3 in Johnson Ranch reach. The total sedimentation volume predicted from model is 8.36 m3 for Santa Elena reach and14.54 m3 for Johnson Ranch reach. The difference between model and field measurements are 1.19 m3 and 1.66 m3 and the errors are 14% and 11%, respectively. The comparison indicates the model has a reasonable agreement with the field measurements under the limited data availability.
水射流教学课件英文版：Ch6 Applications of WJT
Jet-bit drilling in China petroleum industry experienced three stages characterized by pump pressure levels.
With the changes in hydraulic parameters, the drilling speed increased amazingly.
Mechanical Drilling 3. Negative pressure pulsed jet
2
Back Ground
In 1980’s, America launched a large research program funded by DOE to look for rock drilling or breaking methods better than conventional. Through extensive & long term studies in many Labs, 25 types of rock breaking methods including laser, plasm, HPWJ, explosion, etc. have been experimented with in rock drilling. It is concluded that the HPWJ is the most promising one that could be possibly put into use in short future.
5
Jet Bit Drilling Characteristics
Three application phases of jet bit drilling in China :
With the changes in hydraulic parameters, the drilling speed increased amazingly.
Mechanical Drilling 3. Negative pressure pulsed jet
2
Back Ground
In 1980’s, America launched a large research program funded by DOE to look for rock drilling or breaking methods better than conventional. Through extensive & long term studies in many Labs, 25 types of rock breaking methods including laser, plasm, HPWJ, explosion, etc. have been experimented with in rock drilling. It is concluded that the HPWJ is the most promising one that could be possibly put into use in short future.
5
Jet Bit Drilling Characteristics
Three application phases of jet bit drilling in China :
Unit-19-Hydraulic-Basic-Circuits-机电专业英语-图文课件
pneumatic [nju:'mæ tik] adj. 风动的， 气动的 decompression [͵di:kəm'preʃən] n. 降压， 减压， 释
放 regenerative [ri'dʒenəreitiv] adj. 再生的， 新生的 torque [tɔ:k] n. 转矩，力矩，扭矩 lubricator ['lu:brikeitə] n. 润滑剂, 加油器 modification [͵mɔdifi'keiʃən] n. 改装, 修订, 更改 customize ['kʌstəmaiz] v. 定制; 定做; 自定义 neutral ['nju:trəl] adj. 中立的, 中性的; 不确定的 n. 中
位 psi (pound per square inch) 气压单位（1 psi=6.89
kPa）
New Words & Expressions
cylinder ['silində] n. 气筒; 液压缸, 气缸 welder ['weldə] n. 焊工; 电焊机 parallel ['pærəlel] n. 平行, 平行线 solenoid ['səulinɔid] n. 螺线管 energize ['enədʒaiz] v. 给与…能量、电压, 使活跃 actuate ['æ ktjueit] v. 开动（机器）, 驱动 compensate ['kɔmpenseit] v. 补偿, 赔偿 traverse ['trævə:s] v. 横越, 转动, 在轴上旋转 momentarily ['məumən͵terili] adv. 短暂地, 临时地 initiate [i'niʃieit] v. 开始; 创始
放 regenerative [ri'dʒenəreitiv] adj. 再生的， 新生的 torque [tɔ:k] n. 转矩，力矩，扭矩 lubricator ['lu:brikeitə] n. 润滑剂, 加油器 modification [͵mɔdifi'keiʃən] n. 改装, 修订, 更改 customize ['kʌstəmaiz] v. 定制; 定做; 自定义 neutral ['nju:trəl] adj. 中立的, 中性的; 不确定的 n. 中
位 psi (pound per square inch) 气压单位（1 psi=6.89
kPa）
New Words & Expressions
cylinder ['silində] n. 气筒; 液压缸, 气缸 welder ['weldə] n. 焊工; 电焊机 parallel ['pærəlel] n. 平行, 平行线 solenoid ['səulinɔid] n. 螺线管 energize ['enədʒaiz] v. 给与…能量、电压, 使活跃 actuate ['æ ktjueit] v. 开动（机器）, 驱动 compensate ['kɔmpenseit] v. 补偿, 赔偿 traverse ['trævə:s] v. 横越, 转动, 在轴上旋转 momentarily ['məumən͵terili] adv. 短暂地, 临时地 initiate [i'niʃieit] v. 开始; 创始
给水排水专业英语课件(李田)9
11
Effluent quality for any sedimentation process is dependent upon previous water quality, coagulants added, mixing, flocculation, and filtration. With the exception of presedimentation, sedimentation processes are usually preceded by coagulation and followed by filtration.
Байду номын сангаас
layout n. 规划, 设计, (书刊等)编排, 版面, rectangular adj. 矩形的，成直角的
(工厂的)布局图
3
New words and expressions
Inclined tube n. 斜管 effluent adj. 流出的 n.流出物, 出水 Spherical n. 球形的 球的 deposit n. 沉淀物 堆积物 ；储蓄 存款 Reinforced concrete n. 钢筋混凝土 controversial n. 争论的 争议的 Innovation n. 改革 创新 inclination adj. 倾斜, 弯曲, 倾度, 倾向, 爱好 hexagonal adj. 六角形的 六边形的 backwash n. v. 反洗 反冲洗 module n. 模数，模块，组件
7
Settling basins are usually provided for chemical coagulation or softening.
Effluent quality for any sedimentation process is dependent upon previous water quality, coagulants added, mixing, flocculation, and filtration. With the exception of presedimentation, sedimentation processes are usually preceded by coagulation and followed by filtration.
Байду номын сангаас
layout n. 规划, 设计, (书刊等)编排, 版面, rectangular adj. 矩形的，成直角的
(工厂的)布局图
3
New words and expressions
Inclined tube n. 斜管 effluent adj. 流出的 n.流出物, 出水 Spherical n. 球形的 球的 deposit n. 沉淀物 堆积物 ；储蓄 存款 Reinforced concrete n. 钢筋混凝土 controversial n. 争论的 争议的 Innovation n. 改革 创新 inclination adj. 倾斜, 弯曲, 倾度, 倾向, 爱好 hexagonal adj. 六角形的 六边形的 backwash n. v. 反洗 反冲洗 module n. 模数，模块，组件
7
Settling basins are usually provided for chemical coagulation or softening.