Cranes – Design, Practice, and Maintenance phần 1 pdf

[...]... 6 .11 6 .12 6 .13 6 .14 Chapter 7 7 .1 7.2 7.3 7.4 7.5 7.6 7.7 Chapter 8 8 .1 8.2 8.3 8.4 8.5 8.6 8.7 Chapter 9 9 .1 9.2 9.3 9.4 9.5 9.6 Cranes – Design, Practice, and Maintenance The Stewart Platform Reeving 19 3 Checking the alignment of containers etc with Laser Scanners 19 4 Spreader Positioning System 19 6 Camera-Monitor Systems 19 8 Construction and calculation methods on strength and fatigue Materials –. .. bolt and rivet, and other systems to construct large and strong structures gave rise to the possibility of the manufacture of water-driven, steam-driven, and electrically driven cranes 4 Cranes – Design, Practice, and Maintenance Fig 1. 1.4 The development of slewing level luffing cranes from 18 5 6 1 956 Enormous advances now mean that huge loads can be lifted by offshore- and derricking- and slewing cranes. .. mass, and looking forward to the challenges and problems of today and tomorrow, the following saying is appropriate: Hats off for the past, coats out for the future (Winston Churchill) Introduction Fig 1. 1.5 The development of floating cranes 19 0 5 1 936 5 6 Cranes – Design, Practice, and Maintenance Fig 1. 1.6 10 0 t mobile ‘all-purpose’ crane 1. 2 Power Archimedes said: Giûe me a leûer long enough and a... and transport them at high speeds, are grouped with lifting equipment, along with container lifters which are mounted on trucks and barges Reach stackers, draglines, and many others also belong to this family Introduction Fig 1. 3.3 Bulk unloader Fig 1. 3.4 Level luffing cranes 11 12 Cranes – Design, Practice, and Maintenance Fig 1. 3.5 Bock crane Fig 1. 3.6 Autocrane for heavy loads Introduction Fig 1. 3.7... stand and I will lift the world While, in theory, this would seem to be true, in practice it is not of course possible There are real practical limitations How much work can a man do? Introduction Fig 1. 1.7 Lemniscate grabbing crane 7 8 Cranes – Design, Practice, and Maintenance – Using a handle: maximum 8 1 2 kilogram force on a stroke of approximately 0,4 m So AGKBSG8B40G320 kg cmG32 Nm – Using a hand... supply, on the crane itself using the crane’s own transformer 10 Cranes – Design, Practice, and Maintenance Fig 1. 3 .1 Container quay cranes Fig 1. 3.2 Automatic stacking cranes Diesel engines are also used as the motive power for cranes and transporters These engines power the generators and oil pumps The generators drive the electric motors and the oil pumps serve the oil-driven motors or hydraulic cylinders... routine Figures 1. 1.4 and 1. 1.5 illustrate the development of cranes over relatively short periods of time and show the vast differences in size and lifting capacity Figures 1. 1.6 and 1. 1.7 show typical cranes that are in use today Acknowledging the great strides made by our predecessors, in advancing the technology, science, and engineering which has transformed our ability to lift, hoist and move vast... approximately 15 minutes maximum 8 1 2 kilograms on a radius of approximately 0,4 m and with a circumference speed of approximately 1 m͞sec – The pulling force on a rope for hoisting by one man is about 25 kg during short periods Power consumption by one man is approximately: – – – – During normal walking During fast walking During fast running During working in the garden (1 Joule G1 Wattsec) 30 60 16 0 14 0 Watt... Practice, and Maintenance Fig 1. 3.5 Bock crane Fig 1. 3.6 Autocrane for heavy loads Introduction Fig 1. 3.7 Ringer crane Fig 1. 3.8 Floating derrick 13 14 Cranes – Design, Practice, and Maintenance Fig 1. 3.9 Two offshore cranes; each for 4000 t (By courtesy of Heerema/IHC Gusto Eng BV) Fig 1. 3 .10 Tower crane ... problem solving 2 Cranes – Design, Practice, and Maintenance Fig 1. 1.2 Wooden crane As civilization developed and labour could be organized, structures such as the pyramids were built The Egyptians lifted and moved enormously heavy stone blocks in the construction of these vast tombs Theories vary, but it is believed that they used a sort of cradle and employed the forces of momentum and equilibrium . xix Chapter 1 Introduction 1 1 .1 History 1 1.2 Power 6 1. 3 Some types of cranes and lifting equipment 9 1. 4 Capacities, number of cycles, cycle-time 16 – Container quay cranes 16 – Grab unloaders 20 1. 5. 17 6 – Detectors with linear absolute encoders 17 6 – Antenna–transponder systems 17 7 – Radar systems 17 8 – Laser systems 17 9 – The influence of wind and eccentric loading of the container 17 9 –. skew 18 0 6.8 The automatic identification of containers 18 0 – Tags 18 0 6.9 Electronic Data Interchange (EDI) 18 3 – General 18 3 – GPS and DGPS 18 4 – Automatic vehicle and container location 18 5 –