Use and maintenance of hydraulic equipmentPublished: 2010
Introduction This book is a summary of the editor's many years of practical engineering experience. The training content is rich and close to the actual engineering. The goal is to cultivate operational ability. This book includes 25 topics in 7 units, focusing on the basics of hydraulic transmission and hydraulic transmission, common hydraulic components, hydraulic auxiliary components, hydraulic transmission systems, basic fault diagnosis methods of hydraulic transmission systems, fault diagnosis and elimination of common hydraulic components, Fault diagnosis and elimination of hydraulic transmission system. Each unit also includes content such as unit overview, summary, and review questions, which makes the reader closer to the actual operation and easier to understand and master. This book can be used as a teaching material for secondary vocational school machinery and related professional hydraulic courses. It can also be used as a reference book by relevant technical personnel.
Preface Unit 1 Basics of Hydraulic Transmission and Hydraulic Transmission 1.1 Overview of Hydraulic Transmission 1.1.1 Overview of Transmission 1.1.2 Working Principles and System Composition of Hydraulic Transmission 1.1.3 Features and Applications of Hydraulic Transmission 1.1.4 Hydraulic Transmission in Construction Machinery Application 1.2 Hydraulic oil 1.2.1 Classification of hydraulic oil 1.2.2 Selection of hydraulic oil 1.3 Overview of hydraulic transmission unit Summary review question unit 2 Common hydraulic components 2.1 Hydraulic pump and hydraulic motor 2.1.1 Overview 2.1.2 Gear pump and gear Motor 2.1.3 Vane pump and vane motor 2.1.4 Piston pump and plunger motor 2.2 Main types and characteristics of hydraulic cylinders 2.3 Hydraulic control valves 2.3.1 Overview 2.3.2 Directional control valves 2.3.3 Pressure control valves 2.3.4 Flow control valve 2.3.5 Multi-way reversing valve 2.3.6 Cartridge valve 2.3.7 Servo valve 2.3.8 Electro-hydraulic proportional valve 2.3.9 High-speed on-off valve 2.3.10 Selection unit of hydraulic control valve Summary review thinking unit 3 Hydraulic Auxiliary Components 3.1 Sealing Elements 3.2 Tubing and Fittings 3.3 Filters 3.4 Accumulators 3.5 Fuel Tanks and Coolers 3.6 Pressure Gauge Switch and Pressure Relay Unit Summary Review Question Unit 4 Hydraulic Transmission System 4.1 Components of Hydraulic Transmission System And Requirements 4.2 Basic Types of Hydraulic Transmission System Units Review Review Questions Unit 5 Basic Methods for Fault Diagnosis of Hydraulic Transmission System 5.1 General Procedures for Fault Diagnosis of Hydraulic Transmission System 5.2 Visual Inspection Method 5.3 Operation Adjustment Inspection Method 5.4 Comparative Replacement Inspection Method 5.5 Instrument Measurement Inspection Method Unit Summary Review Questions Unit 6 Troubleshooting and Troubleshooting of Common Hydraulic Components 6.1 Troubleshooting and Troubleshooting of Hydraulic Pumps 6.1.1 Troubleshooting and Diagnosis of Gear Pumps 6.1.2 Troubleshooting and Troubleshooting of Vane Pumps 6.1.3 Piston Pumps 6.2 Fault diagnosis and troubleshooting of hydraulic motors for construction machinery 6.3 Fault diagnosis and elimination of hydraulic cylinders for construction machinery 6.3.1 Fault diagnosis and elimination of plunger cylinders 6.3.2 Fault diagnosis and elimination of piston cylinders 6.4 Hydraulic Valve fault diagnosis and elimination 6.4.1 Causes of failure of hydraulic valves and several typical hydraulic phenomena 6.4.2 Fault diagnosis and elimination of relief valve 6.4.3 Fault diagnosis and elimination of check valve 6.4.4 Reversing valve Fault diagnosis and elimination 6.4.5 Fault diagnosis and elimination of pressure reducing valve 6.4.6 Fault diagnosis and elimination of balance valve 6.4.7 Sequence valve malfunction Breaking and troubleshooting 6.4.8 Servo valve fault diagnosis and troubleshooting 6.4.9 Electro-hydraulic proportional valve fault diagnosis and troubleshooting unit Summary review question unit 7 Fault diagnosis and troubleshooting of hydraulic transmission system 7.1 Hydraulic universal testing machine fault diagnosis and 7.1.1 Structural principle of hydraulic universal testing machine 7.1.2 Hydraulic pump and hydraulic valve 7.1.3 Accuracy check method and troubleshooting 7.2 Failure diagnosis and elimination of concrete pump truck hydraulic system 7.2.1 Failure of concrete pump truck hydraulic system Diagnose two cases 7.2.2 IPF-85B concrete pump truck main hydraulic system fault diagnosis 7.2.3 concrete pump truck pumping failure diagnosis and troubleshooting 7.2.4 common pump truck concrete failure and troubleshooting 7.3 QTZ25 self-elevating tower crane roof Fault diagnosis and elimination of hydraulic system 7.4 Fault diagnosis and elimination of hydraulic drive system of roller 7.4.1 Fault diagnosis and elimination of hydraulic system of roller walking mechanism 7.4.2 Fault diagnosis and elimination of BW214D roller hydraulic system 7.4.3 CA25D vibration Fault diagnosis and troubleshooting unit for roller walking weakness and intermittent vibration Summary of review questions Appendix A Common hydraulic drive diagram Shape symbol (taken from GB / T 786.1-2009)
Appendix B Commonly used quantities and their symbols, units and conversion references