News: India’s hydraulic systems sector is experiencing significant growth, driven by expanding industrial automation, infrastructure development, and increasing demand. Hydraulic systems & its applications.
About Hydraulic Systems
- Principle: A hydraulics system is based on the simple principle of Pascal’s law, named for the 17th century French scientist Blaise Pascal.
- The law states that when pressure is applied to an incompressible fluid, it is transmitted equally in all directions throughout the fluid.
- Pressure is the amount of force per unit area.
- In a hydraulic system, pressure is created by applying force to a fluid and it is subsequently transmitted equally in all directions, a small force applied over a small area can create a much larger force over a larger area.
- Parts of a hydraulic system: There are six general components in every hydraulic system.
- Pumps: Used to convert the input mechanical energy into pressure and generate a flow.
- There are different types of pumps, including gear type, axial piston type, variable delivery type, and so on.
- Pipes: Used to carry the oil to the end points of the application and return to the tank.
- Valves: Used to control the flow and direction of the pressurised oil.
- Valves are classified broadly based on their actions on the oil: flow control, direction control, and pressure control.
- Linear actuators or rotary actuators: Used to deliver the work at the output end.
- The most common one in use is the linear actuator, also known as a hydraulic cylinder.
- In a rotary actuator (also known as a hydraulic motor) the output is rotating rather than linear.
- Tank (with filters): Used to hold the hydraulic oil.
- Sensors or switches: Used whenever needed from an operational or safety perspective.
- Pumps: Used to convert the input mechanical energy into pressure and generate a flow.
Applications and Advantages
- Application: Hydraulic systems have a broad base of applications today, from agriculture to waste management, from automation to wind turbines.
- They can be used for both mobile equipment — cranes, excavators, etc. which move on wheels or tracks — and static applications such as a hydraulic press, moulding machines, windmills, etc. wherein the main equipment is static.
- Advantages: Hydraulics have many advantages over mechanical methods of transmitting energy.
- The principal ones are smooth movements, high power to weight ratio, better heat dissipation, smooth controls, and higher precision.
