How Hydraulic Machines Work

From the backyard log partition to the huge machine seen at the construction site, the strength and flexibility of hydraulic pressure are wonderful! At the construction site, you can see hydraulic operated machines such as bulldozers, excavators, shovels, loaders, forklifts and cranes.

Hydraulic system can control the control surface of large aircraft. You can see that the hydraulic equipment of the car service center lifts the car so that the mechanic can work under it. Many of them use the same technology for hydraulic operation. Even if your car's brake uses hydraulic pressure!

In this article I will learn the basics for working with hydraulic systems and then examine a number of different hydraulic machines found at the construction site. You will be amazed by the power and versatility of the hydraulic system.

Hydraulic machines are machines and tools that use liquid fluid power for simple work, using hydraulic operation, the liquid is the power medium. In heavy machinery and other types of machinery, hydraulic oil travels throughout the machine to various hydraulic motors and hydraulic cylinders and is pressurized according to the resistance present. Fluid is controlled directly or automatically by control valve and distributed through hose and pipe. Hydraulic systems use liquid fluid forces for easy work by using hydraulic operation where liquid is a force medium. Heavy machinery is a common example. In this type of machine, hydraulic fluid is sent through the entire machine to various hydraulic motors and hydraulic cylinders and is pressurized according to the resistance present. Liquid is controlled directly or automatically by control valves and distributed through hoses and pipes

Hydraulic press utilizes the pressure in the liquid. It is accomplished by a set of two or more cylinders connected by a pipe containing hydraulic fluid. Each cylinder is a piston. For the machine to work, force is applied to the cylinder called the "master cylinder". This increases the pressure of the fluid throughout the system, but the other cylinders (making the cylinder "slave") start to perform useful actions. The force generated by each slave cylinder depends on its diameter. The working principle of the hydraulic machine is the same as the operating principle of lever and gear. The wider the driven cylinder, the greater the applied force and the shorter the travel distance. Since the reverse is also applicable as lever and gear, narrow slave cylinder moves a great distance with small force

Hydraulic press is a machine that generates compressive force using a hydraulic cylinder (see "Machine press"). It uses hydraulic pressure equivalent to mechanical lever and is also known as Bramah press after UK inventor Joseph Bramah. He invented in 1795 and got a patent of the press. Bramah (he is also known for developing flush toilets) set up a toilet so he studied existing literature on fluid motion and applied this knowledge.