Hydraulic Jack
Pascal’s Law:
Pascal's law or the Principle of
transmission of fluid-pressure states that "pressure exerted anywhere
in a confined incompressible fluid is transmitted equally in all directions
throughout the fluid such that the pressure ratio (initial difference) remains
the same.
If F is the magnitude of the normal force on the piston and A is the surface area of a piston, then the pressure, P, of the fluid at the level to which the device has been submerged as the ratio of the force to area.
P=F/A
Since the pressure is force per unit area, it has units of N/m2 in the SI system. Another name for the SI unit of pressure is Pascal (Pa)
1
Pa=1N/M2
An important application of
Pascal's law is the hydraulic jack
A force F1 is
applied to a small piston of area A1. The pressure is transmitted
through a fluid to a larger piston of
area A2. Since the pressure is the same on both sides,
Here, P = F1/A1
= F2/A2.
Therefore, the force F2
is larger than F1 by multiplying factor A2/A1.
Bolt tightening with Hydraulic Jack
 |
| Hydraulic jack |
 |
| Hydraulic pump |
Use:
Bolt tightening, Hydraulic
brakes, Car lifts,Load lifting in industries etc.
VISITORS ZONE
|
Q:What should be properties of hydraulic oil?
How a pneumatic jack differ from strand jack?
Please put your answer in comment section for discussion
Posts
A pneumatic jack is a hydraulic jack that is actuated by compressed air where A strand jack is a specialized hydraulic jack that grips steel cables.
ReplyDeleteA hydraulic jack is a jack that uses a liquid to push against a piston. This is based on Pascal’s Principle.
ReplyDeleteHydraulic jacks are distributed to different types with a difference in construction. There are Floor Jacks in which the horizontal piston presses on the short end of a bell crank, with the long arm providing the vertical motion to an elevating pad, kept level with a horizontal linkage. Floor jack
ReplyDelete