4.1. PRINCIPLE:
The hydraulic crane works on the principle of Pascal’s law which states that “a change in the pressure at any point of an enclosed incompressible fluid is conveyed undiminished to every part of the fluid and to the surfaces of its container”. Pressure is the result of a force applied over a specific area, and that pressure is therefore measured by the formula P=F/A Where, P= pressure in N/m² F=magnitude of force in N A=area in m² A force F1 is applied to a small piston of area A1. The pressure is transmitted through a liquid to a larger piston of area A2. Since the pressure is the same on both sides, we see that P = F1/A1 = F2/A2. Therefore, the force F2 is larger than F1 by multiplying factor A2/A1. Hydraulic brakes, car lifts, hydraulic jacks, and forklifts all make use of this principle.
Fig 4.1: PRINCIPLE OF PASCAL’S LAW
14 4.2. OTHER APPLICATIONS OF PASCAL’S LAW:
? This law is the underlying principle of hydraulic press. ? It is the basic principle of siphon shown in fig.4.2.1.
? Pascal’s law finds its application in hydraulic lifts, hydraulic brakes, hydraulic press
(bramah press), hydraulic cranes etc.,
Fig 4.2.1: SIPHON
Fig 4.2.2. APPLICATIONS OF PASCAL’S LAW IN HYDRAULIC SYSTEMS
doc_591174971.docx
The hydraulic crane works on the principle of Pascal’s law which states that “a change in the pressure at any point of an enclosed incompressible fluid is conveyed undiminished to every part of the fluid and to the surfaces of its container”. Pressure is the result of a force applied over a specific area, and that pressure is therefore measured by the formula P=F/A Where, P= pressure in N/m² F=magnitude of force in N A=area in m² A force F1 is applied to a small piston of area A1. The pressure is transmitted through a liquid to a larger piston of area A2. Since the pressure is the same on both sides, we see that P = F1/A1 = F2/A2. Therefore, the force F2 is larger than F1 by multiplying factor A2/A1. Hydraulic brakes, car lifts, hydraulic jacks, and forklifts all make use of this principle.
Fig 4.1: PRINCIPLE OF PASCAL’S LAW
14 4.2. OTHER APPLICATIONS OF PASCAL’S LAW:
? This law is the underlying principle of hydraulic press. ? It is the basic principle of siphon shown in fig.4.2.1.
? Pascal’s law finds its application in hydraulic lifts, hydraulic brakes, hydraulic press
(bramah press), hydraulic cranes etc.,
Fig 4.2.1: SIPHON
Fig 4.2.2. APPLICATIONS OF PASCAL’S LAW IN HYDRAULIC SYSTEMS
doc_591174971.docx