PASCAL LAW - BRAKE SYSTEM - HYDRAULIC LIFT - HYDRAULIC PRESS

PASCAL’S LAW

Definition: Liquids transmit external pressure equally in all directions, which acts perpendicularly to the walls of container.

THE HYDRAULIC BRAKE SYSTEM

Hydraulic break system used to stop moving vehicles and work on the basis of Pascal’s principle.

Construction:

The hydraulic brake system consists of a master cylinder joined by tubes to four smaller cylinders, one for each wheel of the car. They ate called brake cylinder .All cylinders are provided with oil tight pistons.

Working

A forward push on the brake pedal causes a force on the piston in the master cylinder and a consequent pressure on the brake oil. These undiminished transmitted pressure forces the piston in each brake cylinder to act on the brake shoe attached to a caliper or against a rotor in the case of disk brake. The resulting friction stops the car.

HYDRAULIC LIFT

Construction:

In hydraulic lift a narrow cylinder ‘A' is connected with a wider cylinder 'B' and they are fitted with airtight pistons. Cylinders are filled with some incompressible fluid.

Working

Pressure applied downward on the piston A is transmitted undiminished on each unit area on the piston of cylinder B. The piston B serve as a platform for a car or any heavier object to lift.

HYDRAULIC PRESS

Construction:

In hydraulic press a narrow cylinder 'A' is connected with a wider cylinder 'B' and they are fitted with airtight pistons. The cylinder 'B' is provided with a rigid roof over it. Cylinders are filled with some incompressible fluid.

Working

Pressure applied downward on the piston A is transmitted undiminished on each unit area on the Hydraulic Press piston of cylinder B. The piston B moves upward and compress the material placed between piston 'B' and the roof over it.