CAT液压内部培训教程汇.ppt

Objectives 目标 Understand study 了解及学习 Hydraulic systems 液压系统 Open Center Systems 开芯式系统 Hydraulic Components 液压零件 Basic Equations 基本公式 Calculations Validate calculation with measurements on 通过测量对SEM650的计算进行验证 Specific objectives 特定目标 ?? Power Flow 动力流动 Energy Distribution during Truckloading 9XX 9XX 装车应用时的能量分配 Focus Primary users of energy 焦点能量的主要使用者 Implement System 工作装置系统 Powertrain System 传动系统 Implement System 工作系统 Open Center Systems 开芯式系统 Main system 主要系统 Pilot system 先导系统 Implement valve function 工作阀功能 Area curves 面积曲线 Performance Characteristics 性能特性 Math Modeling 数学建模 Problems/Exercises 问题/练习 Closed Center Systems 闭芯式系统 Variable Implement Pump Controls 可变的工作阀控制 Load Sensing Circuits 负载敏感回路 Problems/Exercises 问题/练习 Terminology Industry Academia – tandem center valve Means that in neutral the flow path from Pump to Cylinder - closed Cylinder to Tank - closed Pump to Tank – open Caterpillar – most Cat engineers call this an open center valve Industry Academia – open center valve In neutral Pump to cylinder to tank all open Hydraulic Schematics Tandem Center Valve(Open Center at Cat) Tandem Center Valve(Open Center at Cat) 627 G – Implement SystemTandem Center – Interrupted Series 980H Implement Schematic Tandem Center (open) Interrupted Series 988H Implement SchematicTandem (Open) Center Interrupted Series Tandem (Open) Center System Work at white board What’s wrong with this circuit? Tandem (Open) Center Hydraulic System开芯式液压系统 Valve Hardware阀硬件 Tandem (Open) Center Hydraulic Valve Operation 开芯式液压阀操作 988H Tilt Stem Characteristics 988H Lift Stem Characteristics Pump Hardware Gear Pump Pump HardwareVane Pump Pump HardwarePiston Pump WHERE Are the components located on your machine? 不同的零件在山工车上的分布？ Next slide shows 992 locations 下一张幻灯片展示的是不同的零件在992上的分布 Examine actual machine装载机现场调查 Work at Board 白板展示 Speed Control 速度控制 Force Control 力的控制 Feedback to operator 对驾驶员的反馈 Speed ControlFill in chart for a light load