The document describes a hydraulic intensifier that converts low-pressure liquid into high-pressure liquid using a fixed ram and sliding cylinder structure. It details the device's construction, working mechanism, and applications such as in hydraulic presses and cranes. The intensifier requires a supply of low-pressure liquid to generate high pressure needed for various industrial applications.

1. GUIDED BY:-
PROF . Ankit Dandiwala
PREPARED BY:-
Urvesh Dungarani 140050119506
Dharmendra Rathore 140050119505
BITS EDU CAMPUS

2.  It is a device used for producing high pressure
liquid by using the energy of larger amount of
liquid at low pressure.
Low
pressure
liquid
to
High
pressure
liquid

3.  FIXED RAM .
 SLIDING CYLINDER OR RAM.
 FIXED CYLINDER .
 VALVES.

4.  FUNCTION: It is used to increase the intensity of
pressure of liquid by energy available from a
large quantity of water at a low pressure.
 CONSTRUCTION: It consist of fixed ram
surrounded by a sliding cylinder which is itself
surrounded by a larger fixed cylinder as show in
figure.
 The sliding cylinder contains water at high
pressure which is supplied to the machine
through fixed ram. The large fixed cylinder
contains water from the main supply at a low
pressure.

6.  WORKING : A large quantity of water at a low
pressure from a supply enters the large fixed
cylinder through a valve D. same time, the
sliding cylinder lies at a bottom of the stroke.
 The valve D and B are than closed and valve A
is opened. hence low pressure liquid from
supply enters the sliding cylinder through
valve A ,and valve C is opened which allows
the low pressure liquid from fixed large
cylinder to discharge to exhaust.

7.  Therefore, sliding cylinder moves upward.
 When sliding cylinder reaches its topmost
position, the inside space of sliding cylinder
is full of low pressure liquid. Then valve A
and C are closed and valve B and D are
opened.
 The low pressure liquid from supply the
enters large fixed cylinder and forces the
sliding cylinder to move downward, hence
pressure of liquid inside the sliding cylinder
is increased and high pressure liquid is
supplied to the hydraulic machine.

8. Let,
P1= intensity of pressure of low pressure liquid.
P2= intensity of pressure of high pressure liquid.
A1= cross sectional area of sliding cylinder=
𝜋
4
𝐷1
2
.
A2= cross sectional area of fixed ram=
𝜋
4
𝐷2
2
.
D1= Outer Diameter of sliding cylinder.
D2= Outer Diameter of fixed ram.

9. Force exerted by low pressure liquid on the sliding cylinder
(in downward direction)
𝐹1=𝑃1 𝐴1
Force exerted by high pressure liquid on the sliding
cylinder(in upward direction)
𝐹2 = 𝑃2 𝐴2
Equating the upward and downward forces
𝑃1 𝐴1 = 𝑃2 𝐴2
Intensity of high pressure liquid 𝑃2 =
𝑃1 𝐴1
𝐴2
𝑃2 = 𝑃1 ×
𝐷1
𝐷2
2

10.  Air operated hydraulic intensifier are used commonly
for clamping, holding, punching ,presses, jack, torque
wrenches and more.
 It is used in hydraulic press, crane, and lift which
require liquid at very high pressure.
 The high pressure can not be obtain from main supply
directly. It is located between pump and the hydraulic
machine.