My School Project: Hydraulic Bulldozer

    • admin@nie.com
    • Publish Date: May 29 2016 3:14PM
    • |
    • Updated Date: May 29 2016 3:17PM
My School Project: Hydraulic Bulldozer

 Manoj B R, Little Flower Public School, Bangalore 

 
What it is?
  • I have made a model of a hydraulic bulldozer which shows the working of force amplification
  • Hydraulics is the science of transmitting force and motion through a medium of a confined liquid
  • This force can be applied using energy from many resources but I have demonstrated the use of a renewable source of energy to make hydraulics work
Salient features
  • Hydraulics deals with the mechanical properties of liquid and how it can be used under pressurised conditions for the transmission of power
  • Transfer of energy takes place because a given quantity of liquid is subject to pressure 
  • The transmission of power does not diminish the power in a confined liquid 
  • Pressure can cause expansion or resistance to compression by the fluid being squeezed
  • Pressure is force exerted over a specific area and is expressed as pounds per square inches (PSI)
  • Force is relative to pressure and area. Force is actually the product of pressure and area 
 
FACTS
  • Its a large vehicle that is designed for excavation and demolition purposes
  • They are small enough to work on specific tasks within a project area
  • The first hydraulic bulldozer was produced by WG Armstrong & Co., a British company in 1882
  • The best part about hydraulic bulldozer is that it can move up and down more effectively 
 
How I went about it
  • I used pieces of wood for the basic structure of the bulldozer
  • I opted for syringes for hydraulic mechanism because they work on a similar principle
  • If I were to follow Pascal’s Law, I ought to have used syringes of two different sizes. But since the scale of my model was small, I used same size syringes to normalise the effect
 
What we can learn...
  • Power is transmitted by pushing a confined liquid in a particular direction
  • Transfer of energy takes place because quantity of liquid is subject to pressure
  • Renewable sources of energy can be as efficient as any other source
  • Ration of force and pressure can be changed depending on area of piston

While planning and designing the model, it was important for me to 
remember that pressure is not the same as force, to get the right results 
Manoj B R, class IX
 
The model is very innovative. There is application of scientific method to enhance the use of a renewable source of energy. It also promotes new scientific thoughts and technology
Ajey Patil, Physics teacher
 
8/10
 

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Comments

I.Aryan VANA VANI MAT CHOOL

The hydraulic model is good, but can be more efficiently used in the real world where the water gets re-used after an action followed by the other.

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