PM泵车液压培训课件

Part of the energy in a system with flowing liquids is lost due to friction and the pressure drops. 在一个具有流动液体的系统中,由 于有摩擦力,要损失掉一部分的能 量,从而使压力降低
2/98 gm
The basic principles of hydraulics
液压基础课程
Speaker: 培训师: Peter Musterman PM-Akademie 普茨迈斯特培训中心百度文库彼得.姆斯特曼
2/98 gm
1
AKM 506 FN 1 GB
The basic principles of concrete pump hydraulics
混凝土泵的液压基础
Basic principles: pressure distrbution 基本概念: 压力分布 Speed variations 各种速度 Laminar/turbulent flow 层流与紊流 Main pump unit: Inline construction 主泵总成: 串联结构 Piston pump: Axial piston variable-displacement pump 柱塞泵: 轴向柱塞变量泵 Components 组成元件 Variable displacement pump 变量泵 Fixed type 定量泵 Gear pump : Internally geared 内齿合齿轮泵
3
AKM 506 FN 3 GB


2/98 gm
The basic principles of concrete pump hydraulics
混凝土泵的液压基础
Cylinders 液压油缸 Hydraulic motor 液压马达 Hydraulic fluid 液压油 Filters 油过滤器 High-pressure boom filter 布料杆高压油过滤器 Main pump suction filter 主泵的吸油过滤器 Pressure gauge 液压表 Applied hydraulics 实例 Closed loop 闭式回路 Symbols: Various piece parts 符号:各种元件
7
AKM 506 FN 7 GB
Basic principles: Speed variations
基本概念: 各种不同的流速
The same volume must be moved in the same time period
在相同时间内必须流过相同的体积
The speed of the liquid also changes if the diameter is altered
6
AKM 506 FN 6 GB
Applied hydraulics 液压的应用
Open and closed loop 开式回路和闭式回路
2/98 gm
Basic principles: Pressure distribution
基本概念: 压力分布 The pressure of a static liquid is distributed in all directions in a closed system. 在一个封闭的系统中,静止流体的压 力，在各个方向上是均匀分布的
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AKM 506 FN 4 GB


2/98 gm
The basic principles of concrete pump hydraulics
混凝土泵液压基础
Pump and actuators 泵及执行元件 Flow and pressure control valves 流量与压力控制阀 Directional valves 方向控制阀 Valve actuators 阀的执行机构 Sample exercices 练习例子
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2
AKM 506 FN 2 GB
The basic principles of concrete pump hydraulics
混凝土泵的液压基础
Externally geared 外啮合齿轮泵 Valves: Spring preloaded return flow valve 阀 :具有弹簧预应力的单向阀 pressure limiting valve 限压阀 Directional valves 方向阀 Directional valve function 方向阀的控制功能 Naming conventions 名称术语 Monobloc: Generation 7 第7代液压锁 Circuit diagramm 液压油路图 Accumulators 蓄能器 Charge states 充压状态
如果直径改变,流体的速度也会发生变化
high speed = low pressure
速度高=压力低
low speed = high pressure
速度低=压力高
AKM 506 FN 8 GB
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8
Basic principles:Laminar and turbulent flow
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5
AKM 506 FN 5 GB
Contents
目录
Basic principles 基本原理 Components 液压元件
Pumps 油泵 Valves 阀 Monobloc 液压锁 Accumulators 蓄能器 Cylinders 液压油缸 Motors 液压马达 Hydraulic fluid 液压油 Filters 油过滤器 Pressure gauge 液压表