A Short Summary
A hydraulic system will circulate incompressible hydraulic fluids from one part of the system to another through tubes/pipes for generating power. The hydraulic systems have many advantages over others like electric and pneumatic. Some advantages of hydraulic systems are; reduce the noise level of the system, pump backup availability, increases uptime of machines, and high-pressure operations.
Hydraulics is a vast industry having a large number of applications in our world. Mentioning all the applications and examples of hydraulic systems are not possible. In this article, we can discuss some of the examples of hydraulic system. Vehicle breaks, steering, and lifts are common applications of the hydraulic system in daily life.
1. Hydraulic Lifts
Hydraulic lifts are used for moving goods or people vertically. Scissor lifts, two-post lifts, four-post lifts, carousel lifts, and mezzanine lifts are different types of hydraulic lifts used. Hydraulic lifts are used in automobile, shipping, waste removal, and construction applications. Cables are not used with these lifts. So, it eliminates the risk of the dead-drop situation.
Also read: Hydraulic Lifts: Why so Popular Today
A ram, pump, motor, and valve are the main components of a hydraulic lift. The pump, motor, and fluid are kept in a machine room. The pump will exert pressure on the piston for moving the lift upwards and the lift moves downwards when the valve opens. For stopping the lift on particular floors, the power to the pump is disconnected.
2. Hydraulic Brakes
Braking system of the vehicle is an important example of hydraulics. They are classified based on frictional contact mechanism(drum brake and disk brake) and brake force distribution(single acting and double acting).
Master and slave cylinders, lines, pads, brake fluids, and rotor are the components used for the hydraulic braking system. The commonly used brake fluids are DOT fluid or mineral oil. While pressing the foot on the brake pedal, this will exert pressure to the fluid inside the brake lines. According to Pascal’s principle, this pressure passing through the brake lines will exert pressure on another cylinder causing the vehicle's brake shoes and pads to contact.
3. Hydraulic Steering
Hydraulic power steering is an important part of the vehicles that help to change the direction of the vehicle to left or right. This system reduces the effort of drivers and absorbs road shocks. Control valve, pinion gear, pressure/return lines, piston, and rack housing are the primary components used for hydraulic power steering. The clockwise and anti-clockwise direction of the steering wheel will open and closes the valve attached to the rack housing. This will push fluid from the reservoir into the rack housing.
4. Hydraulic Jacks
Hydraulic jacks are stronger and can lift heavier loads. Bottle jacks and floor jacks are classifications of hydraulic jacks. A hydraulic jack comprises of a cylinder and pumping system for storing and transferring hydraulic fluid. The pumping system contains a hand-powered or mechanically powered pump for applying pressure on the fluid. The one-way valve pushes the fluid towards the jack cylinder and doesn’t allow to flow back. The working is based on Pascal’s principle(the pressure inside a closed surface will be equal).
Also Read: Applications of hydraulics and Pneumatics
5. Heavy Equipment
Hydraulics based heavy equipment will have more strength and ability to move quickly. Most of the construction industry uses such equipment. Bulldozers, backhoes, log splitter, shovels, loaders, forklifts, and cranes are some machinery used. In backhoes and excavators, the movement of the arm is based on hydraulics. Bulldozers use a hydraulic system for the movement of blades. Dump truck lifts the box part of the truck using hydraulics.
Hydraulics is applied in airplanes and jet planes in many instances like adjusting wings, retraction and extension of landing gears, opening/closing of doors, brakes, steering, etc. The operating pressure will vary from 200 psi to 5,000 psi depending on the hydraulic system. Hydraulics have many advantages like the cost-effective, easy to maintain, efficient working under all condition.
7. Hydraulic Shock Absorbers
This is a device used to absorb and damp shock impulses. A cylinder with hydraulic oil and a piston are the components used for developing shock absorber. The piston will move up and down based on the compression and expansion of the string.