File Name: hydraulic system components and operation .zip
If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user. Virtually all aircraft make use of some hydraulically powered components. In light, general aviation aircraft, this use might be limited to providing pressure to activate the wheel brakes. In larger and more complex aeroplanes, the use of hydraulically powered components is much more common.
Depending upon the aircraft concerned, a single hydraulic system, or two or more hydraulic systems working together, might be used to power any or all of the following components:. A hydraulic system consists of the hydraulic fluid plus three major mechanical components. Fluid is the medium via which a hydraulic system transmits its energy and, theoretically, practically any fluid could be utilized. However, given the operating pressure to psi that most aircraft hydraulic systems generate in combination with the environmental conditions and strict safety criteria under which the system must operate, the hydraulic fluid that is used should have the following properties:.
Several types of hydraulic pumps driven by a variety of power sources can be found in aviation applications. Pumps include:. Aviation hydraulic systems, in general, are of the "open loop" variety drawing fluid from a reservoir, pressurizing it and making it available to the various user components before returning the fluid to the reservoir.
The primary components of the "plumbing" portion of the hydraulic system include the following:. Hydraulic system redundancy is achieved by two primary means - multiple systems and multiple pressure sources within the same system. Hydraulic system overheat, loss of pressure or fluid contamination can all result in the loss of the hydraulic system and the loss of function of those components that it powers.
Fluid contamination can also result in loss of hydraulic system efficiency, fluid leaks, excessive component wear and premature component failure. The primary defense against hydraulic fluid contamination lies in robust maintenance practices.
Any fluids used to service the system must be as specified in the AOM and fluid types should not be mixed. Care should be taken to ensure that the fluid is not contaminated prior to use and that no contaminants are introduced to the system while topping up the fluid. System filters should be cleaned or replaced as per manufacturer's guidelines. If the loss of pressure was as a result a total of loss of hydraulic fluid, the system is not recoverable.
Hydraulic systems have countless applications from the breaks in a car, to construction equipment and manufacturing technology. They are simple and cost-efficient mechanisms that are used to create movement, lift heavy loads or repeat a particular action. The basic idea of all hydraulic systems is that force applied at one point is transmitted through a fluid to another point. In order for this to work, the fluid which is usually oil must be incompressible, meaning its volume should not change when pressure is applied. Piping and cylinders within the system can be structured and altered in many different ways to achieve specific results. The initial force applied can be multiplied in the process, allowing for applications such as the lifting of heavy loads.
Below are some common illustrations of equipment located on fluids circuit diagrams, followed by descriptions of the most common elements. Later in this article series we will describe some simple hydraulic and pneumatic circuits composed of these circuit elements. Needle valves are used to throttle or shut-off flow of fluids. They usually will vary flow with pressure or viscosity change. Gauges are used to measure the oil pressure at a given point in the system. This is usually measured in PSI or bars.
All motors convert hydraulic to mechanical energy. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next.
If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user. Virtually all aircraft make use of some hydraulically powered components. In light, general aviation aircraft, this use might be limited to providing pressure to activate the wheel brakes.
Unit descriptor. This unit covers checking hydraulic system components, and identifying and repairing or replacing faulty components. Application of the unit. Hydraulic system components are identified, inspected and assessed using fluid power principles to predetermined specifications interpreted from data sheets and circuits diagrams.
- У вас в номере проститутка? - Он оглядел комнату. Роскошная обстановка, как в лучших отелях. Розы, шампанское, широченная кровать с балдахином. Росио нигде не. Дверь, ведущая в ванную, закрыта.
Если бы я действовал по обычным каналам и кто-то узнал… - И Дэвид Беккер единственный, кто не связан с государственной службой. - Разумеется, не единственный. Но сегодня в шесть часов утра события стали разворачиваться стремительно.
Беккер знал, что он выиграл. Санта-Крус - самый старый район Севильи, где нет проездов между зданиями, лишь лабиринт узких ходов, восходящих еще к временам Древнего Рима. Протиснуться здесь могли в крайнем случае только пешеходы, проехал бы мопед.
Куда мы едем. Парень расплылся в широкой улыбке. - А то ты не знаешь. Беккер пожал плечами.
The pressure in the pump line is maintained at a preset level for the relief valve or the variable pumps, and other systems can be operated as desired. On the other.Audomaro A. 10.05.2021 at 18:34
hand or foot operated lever or an electric solenoid. Understanding the basic hydraulic systems and components can be of great value when troubleshooting.Maryse T. 11.05.2021 at 00:11
The fundamental components of the hydraulic system include pump, reservoir, directional valve, check valve, pressure relieve valve, selector valve, actuator, and filter.