ACTION: You will demonstrate a knowledge of the basic components of the hydraulic system , including the devices which actuate, discharge, and control the flow of hydraulic fluid and those devices which sense, control, and limit hydraulic pressure. CONDITIONS: You will use the material in this subcourse. This circuit and components are used to drive the unit in the No.
When the engine is starte the pump draws oil from the reservoir through the suction lines. Basic components to be used in hydraulic systems are categorized as follows. Capture the dirt with a high efficiency filter The flushing target cleanliness code should be two ISO codes below the target cleanliness level for system operation.
Objectives When you have completed this chapter, you will be able to do the following: 1. Understand the operating principles of hydraulic systems. Identify operational characteristics, component functions, and maintenance procedures of a hydraulic system. Components of a hydraulic system Valves are devices for controlling the energy flow.
They can control and regulate the flow direction of the hydraulic fluid , the pressure, the flow rate an consequently, the flow velocity. There are four valve types selected in accordance with the problem in question. Functions of the components shown in Fig. The actuator may be of the linear type (e.g., hydraulic cylinder ) or rotary type(e.g., hydraulic motor ) to provide linear or rotary motion, respectively.
With properly located and perfectly designed components , the hydraulic system should generate a minimum of heat (waste energy) and operate with minimum maintenance. Pressure Relief Valve – They are designed to protect hydraulic system when pressure in the system increases beyond the specified design pressure or maximum working pressure. Hydraulic Systems Components : Part 1. They are normally closed and it opens when the pressure exceeds a specified maximum value and diverts the pump flow back to reservoir or tank internally. With a variety of applications, hydraulic systems are used in all kinds of large and small industrial settings, as well as buildings, construction equipment , and vehicles.
Paper mills, logging, manufacturing, robotics, and steel processing are leading users of hydraulic equipment. How does a hydraulic system basically work? The most common hydraulic fluids used in hydraulic systems are the petroleum-based oils.
What hydraulic fluid to use? 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. If control components are not properly selecte the entire system will fail to deliver the required output. Elements for the control of energy and other control in fluid power system are generally called “Valves”.
In any machine, particularly in hydraulics, any change in one part of the system will affect all the other parts of the total system. The Boeing 7is the first aircraft designed with more electrical systems than hydraulic systems. These systems perform well in hot environment conditions. Most hydraulic systems use mineral oil for the operating media but other fluids such as water, ethylene glycol, or synthetic types are not uncommon.
The hydraulic system uses incompressible fluid which in higher efficiency.
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.