Hydraulic system pdf

This valve body contains the internal porting to direct the fluid flow. The outer ports on the valve block are threaded to allow hoses and lines to be connected to it. It also describes the various components of a typical hydraulic system , their construction and functions, and their relationship to each other.

When the term hydraulics is applied to aircraft, it means a method of transmitting power from one location to another through the use of a confined fluid. Tasks of a hydraulic installation. Hydraulic systems are used in modern production plants and manufacturing installations.

By hydraulics , we mean the generation of forces and motion using hydraulic fluids. The hydraulic fluids represent the medium for power transmission. The most common hydraulic fluids used in hydraulic systems are the petroleum-based oils.

These fluids contain additives to protect the fluid from oxidation, to protect the metals from corrosion, to reduce the tendency of the fluid to foam, and to improve the viscosity. Hydraulic filters are rated by the “size” of the largest opening in the filter media. This “size” is measured in Microns.

Nominal Ratingis an arbitrary Micrometer or Micron value indicated by the filter manufacturer. Due to the lack of reproducibility, this is depreciated. Hydraulics”is one of drive systems to control machinery and equipment, comparable with pneumatics and electricity. A hundred years before that, “water hydraulics ,”the origin of the fluid power systems , emerged. These systems perform well in hot environment conditions.

UNIT FLUID POWER SYSTEMS AND FUNDAMENTALS WHAT IS HYDRAULIC SYSTEM ? The word hydraulics is derived from the Greek word HYDRO and means Water. ADVANTAGES OF HYDRAULIC SYSTEM 1. A hydraulic system circulates the same fluid repeatedly from a fixed reservoir that is part of the prime mover. The fluid is an almost non-compressible liqui so the actuators it drives can be controlled to very accurate positions, speeds, or forces. Flow Control Device Under certain conditions of operation it is prefer- able to be able to control the rate of flow of oil to the ram cylinder or auxiliaries.

Continuing Education and Development, Inc. A basic hydraulic system. Hydraulic System Operating Principles There are two fundamental principles that must be understood when troubleshooting hydraulic system problems.

Pumps (which may be vane, gear, or piston types) are used in hydraulic systems to produce sufficient flow to obtain the speed required from cylinders or motors. Compromises in hose selection may put you in danger, as well as affect the performance and life of your system. The decision may work for the short run, but may not be a good long-term decision.

Remember, the most important thing is your safety. When analyzing or designing a hydraulic circuit, the following three important considerations must be taken into account: 1. Fluid: oil for hydraulic systems, air for pneumatics. Reservoir: storage tank. Hydraulic pump (compressor in pneumatics): converts the mechanical energy into hydraulic energy by forcing fluid from the reservoir into the system. Fluid lines: transport the fluid to and from the pump through the hydraulic system.

Figure shows a simple circuit of a hydraulic system with basic components. Hydraulic Pump- converts the mechanical energy into hydraulic energy by forcing hydraulic flui under pressure, from the reservoir into the system. Hydraulic Valves- control pressure, direction and flow rate of the hydraulic fluid. To achieve the necessary redundancy and reliability, the system may consist of several subsystems. Hydraulic circuits are often applied in chemical processing (flow systems).

Hydraulic pumps operate by creating a vacuum at a pump inlet, forcing liquid from a reservoir into an inlet line, and to the pump. Discover Testing Solutions For Heavy Duty Tension And Compression Materials. Mechanical action sends the liquid to the pump outlet, and.