HYDRAULIC

CRANE
SUBMITTED TO:
MOHIT SIR SUBMITTED BY:
Arshad Alam
ROLL NO :
11145124
GROUP : A1
 INDEX

TOPICS PAGE NO

1. INTRODUCTION 3
2. PRINCIPLE 4
3. PARTS OF HYDRAULIC CRANE 5
4. CONSTRUCTION 6-8
5. WORKING 9- 10
6. APPLICATION 11
7. ADVANTAGES AND DISADVANTAGES 12
8. REFERENCES 13
 Introduction

• Hydraulic cranes “Cranes are one of the bigger lifting devices you may see especially
around large construction sites.
• Hydraulic cranes are amongst the simplest systems that you can use within any industrial
process, and are very easy to maintain.
• The hydraulic crane is used for transferring or raising heavy loads.
• It can be used up to loads 2500 kN.
• It is widely used in loading and unloading ship, warehouses, workshop, heavy industries
and dock sidings.
 Principle

• Pascal's Law, “Pressure applied to any part of a confined fluid transmits to every
other part with no loss. The pressure acts with equal force on all equal areas of the
confining walls and perpendicular to the walls."

• The basic principle of a hydraulic system is that a force applied at one point is
transmitted to another point through an incompressible fluid.

• This basic principle of hydraulics is widely used in engineering to move things.

 Parts of hydraulic crane

• Jib
• Tie
• Guide pulley
• Jigger
• Hollow vertical post
• Ram
• Fixed cylinder
• Movable pulley block
Construction

Fig (1)
 Construction

• The jib and tie are

attached to the vertical
post .jib is hinged near
the foot of the vertical
post .

Fig. (2)

• Hydraulic jigger consist of a movable

ram sliding in a fixed cylinder .

• The sliding ram one end is

connected to set of movable pulley
block and other end is contact with
water.

Fig.
(3)
 Construction

Fig.(4)

• One end of wire rope fixed with cylinder body taken round all the pulley of the two sets of pulley
and at the end passes round the guide pulley block.

• The free end of the wire rope is attached with a hook for suspending the load.
 Working
• During the lifting the load by crane, the • The pressure rise water forces the sliding ram to
high pressure water is admitted into the move right with movable pulley block.
fixed cylinder of jigger.

Fig.(5) Fig.(6)
• So that the distance between two pulley • Which causes the wire passing over the guide
blocks increases pulley is pulled by the jigger and hence the load
attached to hook is lifted.

Fig.(7) Fig.(8)
 Working

• For lower the load, close inlet valve and open water valve so that water is forced out the cylinder
hence ram moves towards the left and distance between two pulley blocks decreases, which release
the wire rope and the load is lowering down

Fig.(9)
 Application

• Hydraulic crane used for lowering workshop and foundary.

• Loading and unloading of ship.
• Railway wagons and heavy industries.
• Construction area in buildings, metro and flyovers etc.
 Advantages and Disadvantages

• Advantages:
i. It uses the pressure of a liquid to perform a mechanical work.
ii. It gives more power than pneumatic systems.
iii. Its reliable to operate.

•. Disadvantages:
i. Slower motion than pneumatic.
ii. Complex construction
iii. Leakage of oil problem.
iv. More maintenance than pneumatic systems.
 References

• Fluid Mechanics, Hydraulics and Hydraulic Machines (Dr. KR ARORA)

• https://www.google.co.in/search?q=hydraulic+crane&espv=2&biw=1242&bih=606&source=ln
ms&tbm=isch&sa=X&ved=0ahUKEwjskMa0zujOAhWCpo8KHVJGDRcQ_AUIBigB
• https://en.wikipedia.org/wiki/Crane_(machine)
• http://m-comm.com/apd/a.php?a=1115
Thank You…