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Hydraulic Elevators (Classic Reprint): Their Design, Construction, Operation, Care and Management: Their Design, Construction, Operation, Care and Management (Classic Reprint) - Tapa blanda
Sinopsis
Understand how hydraulic elevators work and how to keep them safe and reliable.
This practical guide explains the physics behind water pressure lifting a car and walks you through the components, from cylinders and valves to control systems and safety devices. It emphasizes how real installations behave, with diagrams and step-by-step explanations that help technicians install, operate, and maintain high‑rise systems.
The book covers multiple elevator types, including one‑to‑one and water‑balance configurations, and explains how pressure, flow, and load affect performance. It discusses automatic stop valves, accumulators, pilot valves, and various control schemes, along with common problems and how to troubleshoot them. Clear instructions show how to pack cylinders, inspect piping, and manage lubrication and alignment to keep a hydraulic system running smoothly.
- How hydraulic pressure moves the car and how different valve gear controls speed and stopping.
- Details on maintenance tasks, packing, lubrication, and leak management.
- Insights into high‑rise and freight elevators, including plunger and standard plunger designs.
- Safety features and diagnostic guidance to reduce downtime and prevent accidents.
Ideal for readers of technical handbooks and technicians responsible for installing or maintaining hydraulic elevators.
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Reseña del editor
Excerpt from Hydraulic Elevators: Their Design, Construction, Operation, Care and Management
The elevators so far considered are of the type known as low pressure, and are actuated with water pressures ranging between about 40 and 175 pounds per square inch. In the early days of hydraulic elevators the pressure was obtained by pumping water into a tank located upon the roof of the building, and as a column of water of one square inch cross section weighs about of a pound per foot of hight, the pressure seldom exceeded 50 pounds, and in many cases was as low as 30 pounds per square inch. With the advent of high buildings greater car speed was demanded, and this necessitated increasing the power of the elevator machine. This increase could be obtained in two ways, one by making the cylinder of larger diameter, and the other by increasing the pressure. As space in the buildings was valuable, the latter plan was adopted, and in order to obtain the increased pressure; a closed pressure tank was substituted for the open roof tank. The pressure tank had been used years before the time of high-power elevators, in buildings that were so low that the pressure obtained from an open tank on the roof was not high enough to keep the diameter of the cylinder within reasonable bounds; but from this time all elevators installed in high buildings were operated with water drawn from pressure tanks.
The general introduction of the pressure tank resulted in an increase in the working pressure to from 75 to 100 pounds. By this increase the size of the cylinder, the tanks and the piping can be considerably reduced, with a corresponding saving in space and material. With the continued increase in the hight of buildings the pressure has been increased, so that at the present time it is common practice to use pressures up to 180 pounds and even a little higher.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Reseña del editor
Excerpt from Hydraulic Elevators: Their Design, Construction, Operation, Care and Management
The principal mechanism of a hydraulic elevator is very simple, although it does not appear to be so from casual inspection of a first-class installation in a large office building. This is due mainly to the fact that the apparatus is all of large dimensions and so disposed that only a portion of it can be seen from any one point. It is also due to the fact that a number of small parts are added, the function of which is to contribute to the perfection and safety of operation.
The principle of operation of the hydraulic form of elevator is as simple as the construction of the mechanism, and consists in utilizing the force developed by the pressure of water in a hydraulic cylinder to lift a weight, which generally is the elevator car, but in some cases is not. The water under pressure that supplies the elevator cylinder may be derived from street mains, from an open tank placed on an elevation (for example, the roof of the building), or from a pressure tank placed in any convenient location.
The simplest form of hydraulic elevator is illustrated diagrammatically in Fig. 1. The car is suspended from one or more ropes that pass over a sheave A, located at the top of the elevator well, and run down to the upper end of a piston rod R. This rod carries at its lower end a piston P that fits watertight in the lifting cylinder C. Water under pressure is admitted to the cylinder above the piston, through the pipe I, and the piston is thereby forced downward, hoisting the car. To make the apparatus complete, elementally, all that is required is a valve in the pipe I which, when turned in one direction, will connect the cylinder with the pressure tank, or other source of supply, and when turned in the other direction will stop off the supply from the pressure tank and connect the upper end of the cylinder with a discharge tank. When moved to the central position, it must close the outlet from the cylinder so that the water contained therein cannot escape.
It is evident that when the water is permitted to flow out of the upper end of the cylinder, if the elevator car weighs more than the piston P, the piston will run up and the car will run down.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Hydraulic Elevators: Their Design, Construction, Operation, Care and Management
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Paperback. Condición: New. Print on Demand. This captivating book delves into the intriguing world of hydraulic elevators, exploring the fundamental principles that govern their operation. The author meticulously examines the evolution of these remarkable machines, tracing their development from simple concepts to the sophisticated systems used in towering skyscrapers. Through detailed illustrations and clear explanations, the book unravels the intricacies of different types of hydraulic elevators, including vertical, horizontal, plunger, and high-pressure systems. It highlights the advantages and limitations of each design, providing a comprehensive understanding of their underlying mechanisms. The book goes beyond technicalities to explore the significance of counterbalancing in elevator systems. It explains how counterweights reduce the energy required to operate elevators and contribute to their safety and efficiency. The author also discusses the interplay between gear ratios, car speed, and stopping distances, offering practical insights into elevator design and optimization. Overall, this book is a valuable resource for engineers, architects, building managers, and anyone interested in the engineering marvels that transport us effortlessly between floors. Its clear and engaging presentation makes it an accessible guide to the fascinating world of hydraulic elevators. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Nº de ref. del artículo: 9781332017348_0
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Paperback. Condición: Brand New. 338 pages. 9.00x6.00x0.77 inches. In Stock. This item is printed on demand. Nº de ref. del artículo: 1332017347
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