PM泵车液压培训课件.pptVIP

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 彼得.姆斯特曼 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 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 The basic principles of concrete pump hydraulics混凝土泵的液压基础 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 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 Basic principles: Pressure distribution基本概念: 压力分布 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 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 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 Basic principles:Laminar and turbulent flow基本概念: 层流与紊流 Laminar flow 层流 Main pump unit: inline construction主泵单元 : 串联连接方式 Piston pump (1): Axial piston variable-displacement pump柱塞泵(1): 轴向柱塞泵 Piston pump (2): Components柱塞泵(1): 组成元件 Piston pump(