HYDRAULIC INTRODUCTION

HYDRAULICS DEFINITION

Hydraulics ( which stems from the Greek word “Hydor” = water ) is, from the scientific view point, the science of liquids at rest and in motion (i.e. hydrostatics and Hydrodynamics). When reference is made in the mechanical engineering, automotive, and aircraft industries to hydraulic. Then one is speaking of the practical application of this branch of physics in the areas of power transmission and closed and open loop control techniques.

In contrast to hydrodynamics converters, turbo clutches and coupling etc, in which the kinetic energy of accelerated fluids is utilized to transmit power, one refers to hydrostatic system when considering the remainder of hydraulics as a whole. Although the laws of hydrodynamics apply here equally as well in connection with motion, flow resistance and the effects upon pressure of changes in the cross-sectional area of a restriction.

COMPARISON OF SYSTEM

Hydraulics stands side by side with mechanics, electrics, electronics, and pneumatics as a mean of transmitting power and as medium for use in open and closed loop controls. In some cases these system are indirect competition with each other. On the other hand, they complement each other in some respects and are often combined. For instance, it is quite normal to apply hydraulics for the energy flow in a system whereas, on the other hand, the signal flow is taken care of electrically.

The correct decision regarding the application of a particular system ( or combination of system ) presupposes a thorough knowledge of the characteristic involved, as well as of the advantages and disadvantages. The following table contain a comparison of the above named systems taking into account a number of different criteria. Considering examples of application, for which all the marginal conditions are defined, a firm decision can usually be reached. In border line cases, cost, operating reliability, service, know-how, and other criteria which are impossible to allow for in overall comparison, are in the facts which finally lead to a decision.

Hydraulics Applications And Theory

Hydraulics have become absolutely indispensable in the fields of modern-day drive and control techniques. hydraulics is supremely capable of controlling linear and rotating movement, both as regards very large forces, and precision of movement path and speed.
The information presented in this blog is orientated to conditions and examples drawn from everyday practice. basic theory though is also deal with. for this reason this blog is ideally suited to booth engineers and technicians who are actually involved in this sphere of works, as well as to those who at present are merely studying it. In addition to a variety of instruction related to applications of engineering, physical principles are described as well as the design of individual pieces of equipment and complete hydraulic system.

This blog is so arranged that orientation is a simple matter. All hydraulic equipment and system are arranged clearly and systematically.In addition, didactic consideration were taken into account in order that private study of the material is made easier.
The emphasis of this blog applies to the description of the component and this application,whereby the pictorial and graphic representation is in the forefront.Those subjects, such as ''cartridge valves'' and ''proportional valves'' which have lately been the subject of so much discussion are deal with in supplementary chapters. The application of hydraulics on agricultural tractors has also been allocated a special section.
This blog is intended to clearly demonstrate the function, effects and basics of hydraulics. it is to be regarded as both an informative as well as a reference work, and thus as a reliable guide and partner. The fact remains, though, that nothing is perfect and there is nothing which cannot benefit from slight improvements here and there. For this reason, therefore, the technical writers responsible for this blog would welcome any suggestion in this respect.