وبلاگ یک مهندس...

نویسنده: J. Verschoof

تعداد صفحات: 349 صفحه

زبان: انگلیسی

سرفصل های این کتاب:

Chapter 1

Introduction

History

Power

Some types of cranes and lifting equipment

Capacities, number of cycles, cycle-time

Container quay cranes

Grab unloaders

The influence of wind and storms

Hatchless container vessels

Chapter 2

Wire ropes

Wire rope reeving systems

Influencing the lifetime of wire ropes

Drum diameters and wire rope sheave diameters

The choice of wire ropes

Fleet angles; grooves on drums and in wire rope

sheaves

The bending angle over sheaves; the ultimate tensile

limit

The lifetime of wire ropes

Wire rope strength

Chapter 3

Drives; calculating motor powers

Driving systems

The squirrel cage motor with fluid coupling

The slipring motor

The WardLeonard drive

Direct current full-thyristor systems

Alternating current drives with frequency control

Hydraulic drives

Numbers of wire rope sheaves in the hoisting

mechanisms of different reeving systems

Calculating the requisite power of the hoisting

motors

viii Cranes  Design, Practice, and Maintenance

Calculating the needed power of the trolley

travelling motors

Direct driven trolleys or motor trolleys;

wheel slip control

Trolleys pulled by wire ropes or rope driven

trolleys

Rope driven trolleys for grab unloaders with

a main and auxiliary trolley

Hoisting the boom; calculating the power needed for

the boom hoist motor

Calculating the needed power of the crane-travelling

motorsWheelslip control  how to calculate the

forces through skewing of the crane and trolley

The rating of the motors

The root-mean-square calculation

The current supply of a crane by a diesel generator

set: calculating methods and warnings

Calculating the power needed for the slewing motors

of level luffing cranes

Calculating the power needed for the luffing motor

of level luffing cranes

Chapter 4

Brakes

Modern brakes

Hoisting brakes; lowering the load; emergency stop

Hoisting brakes; lowering the load; braking by full

motor torque

Hoisting brakes; hoisting the load; braking by full

motor torque

Hoisting brakes; hoisting the load; emergency stop

Svendborg brakes

Calculating the brake time and braking distance of a

crane

The acceleration of a crane by wind at the beginning

of an emergency stop

Storm pins and storm brakes

Chapter 5

Standards

CEN

FEM

ISO

DIN; BS; JIS

Contents ix

Chapter 6

Sagging and slapping of the wire ropes; rock and roll

of the spreader; machinery trolleys versus wire rope

trolleys; twin-lift; positioning; automatic equipment

identification (AEI)

Sagging and slapping of the wire ropes; other hoist

wire rope systems for container quay cranes and

grab unloaders

The rock and roll of the spreader

Advantages and disadvantages of machinery trolleys

versus wire rope driven trolleys

Container transport with twin-lift spreaders; long

twin-lift; Bramma TandemliftConnecting the

spreader to the headblock

Sway and swing; automation of the trolley travelling

mechanism

The positioning of a hoisting mechanism;

automation

Automatic positioning for crane travelling

mechanisms

Encoder systems

Sensor systems

Hall magnets with electronic measuring rulers

Detectors with linear absolute encoders

Antennatransponder systems

Radar systems

Laser systems

The influence of wind and eccentric loading of the

container

The prevention of skew

The automatic identification of containers

Tags

Electronic Data Interchange (EDI)

General

GPS and DGPS

Automatic vehicle and container location

Scanning

Container inspection by X-ray

Seal recognition

CSC plate control

Checking the damage to containers

GE Toshiba Automation Systems; crane automation

x Cranes  Design, Practice, and Maintenance

The Stewart Platform Reeving

Checking the alignment of containers etcwith Laser

Scanners

Spreader Positioning System

Camera-Monitor Systems

Chapter 7

Construction and calculation methods on strength and

fatigue

Materials

For steel constructions

For mechanisms

Welding

Bolts

Construction of box and lattice girders etc

Boom-ties; diagonals

Calculations on strength and on fatigue

The fatigue load

Fatigue in structures

Fatigue in mechanism components as shafts etc

Pressure between shafts and steel constructions

Design details

The natural frequency

Chapter 8

Wheels and tracks

Calculating the wheel diameters of fast-running

trolleys (ûHmmin)

Calculating the wheel diameter of a crane travelling

wheel for normal speeds (ûGup to mmin)

Differences in wheel loads, due to breaking forces

Rails and rail constructions

Trolley travelling rails and boom hinge points

Wear and tear of a crane rail

Buffers

Chapter 9

Miscellaneous

Overload preventers

Snag loads

Anti-collision systems

Cable reels

Festoon systems: current and data supply to the

trolleys

Inductive power transfer and data transmission

Contents xi

Hoppers

Apron feeders; conveyors

Electronic Tracking Guide System

Gears

The Promo-Teus Conveyor Belt System

Chapter 10

Maintenance

Artwork sources

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