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Hydraulic Lifting Mechanism

INTRODUCTION

In this project we are using hydraulic cylinder for placing object from one place to other.

Hydraulic machinery is machines and tools which usefluid powerto do work.Heavy equipmentis a common example.

In this type of machine, high-pressure liquid called hydraulic fluid is transmittedthroughout the machine to various hydraulic motors and hydraulic cylinders. The fluid is

controlled directly or automatically bycontrol valvesand distributed throughhosesandtubes.

The popularity of hydraulic machinery is due to the very large amount of power that can betransferred through small tubes and flexible hoses, and the high power density and wide array of

actuatorsthat can make use of this power.

Hydraulic machinery is operated by the use of hydraulics, where a liquid is the powering

medium. Pneumatics, on the other side, is based on the use of a gasas the medium for powertransmission, generation and control.

Force and torque multiplication

A fundamental feature of hydraulic systems is the ability to apply force or torque multiplicationin an easy way without the need of mechanical gears or levers, either by altering the effectiveareas in two connected cylinders or the effective displacement between a pump and motor.

Examples

(1) Two hydraulic cylinders interconnected:

Cylinder C1 is one inch in radius, and cylinder C2 is ten inches in radius. If the force exerted onC1 is 10lbf, the force exerted by C2 is 1000 lbf because C2 is a hundred times larger in area (S =

r) as C1. The downside to this is that you have to move C1 a hundred inches to move C2 one

inch. The most common use for this is the classical hydraulic jack where a pumping cylinderwith a small diameter is connected to the lifting cylinder with a large diameter.

(2) Pump and motor:

If a hydraulic rotary pump with the displacement 10 cc/rev is connected to a hydraulic rotary

motor with 100 cc/rev, the shaft torque required to drive the pump is 10 times less than the

torque available at the motor shaft, but the shaft speed (rev/min) for the motor is 10 times less

http://en.wikipedia.org/wiki/Fluid_powerhttp://en.wikipedia.org/wiki/Fluid_powerhttp://en.wikipedia.org/wiki/Fluid_powerhttp://en.wikipedia.org/wiki/Engineering_vehiclehttp://en.wikipedia.org/wiki/Engineering_vehiclehttp://en.wikipedia.org/wiki/Engineering_vehiclehttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Hydraulic_fluidhttp://en.wikipedia.org/wiki/Hydraulic_fluidhttp://en.wikipedia.org/wiki/Control_valveshttp://en.wikipedia.org/wiki/Control_valveshttp://en.wikipedia.org/wiki/Control_valveshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Actuatorhttp://en.wikipedia.org/wiki/Actuatorhttp://en.wikipedia.org/wiki/Pneumaticshttp://en.wikipedia.org/wiki/Pneumaticshttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Lbfhttp://en.wikipedia.org/wiki/Lbfhttp://en.wikipedia.org/wiki/Lbfhttp://en.wikipedia.org/wiki/Hydraulic_jackhttp://en.wikipedia.org/wiki/Hydraulic_jackhttp://en.wikipedia.org/wiki/Hydraulic_jackhttp://en.wikipedia.org/wiki/Lbfhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Pneumaticshttp://en.wikipedia.org/wiki/Actuatorhttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Hydraulic_machinery#Hose.2C_tubes_and_pipeshttp://en.wikipedia.org/wiki/Control_valveshttp://en.wikipedia.org/wiki/Hydraulic_fluidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Engineering_vehiclehttp://en.wikipedia.org/wiki/Fluid_power

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than the pump shaft speed. This combination is actually the same type of force multiplication as

the cylinder example (1) just that the linear force in this case is a rotary force, defined as torque.

Both these examples are usually referred to as a hydraulic transmission or hydrostatic

transmission involving a certain hydraulic "gear ratio".

PROJECT DESCRIPTION

In our project we are using a system which will work in both vertical and horizontal ways.Approx 3 by 2 feet of structure design is used here; its basic application will be in industries

which will go to be atomized by microcontroller systems soon.

These lifts will be used to lift and place heavy objects from one place to another, and controlled

by remote.

BLOCK DIAGRAM WITH CALCULATIONS:

CHANNEL

PLATFORM

1X1.25X1 FEET

LIFTING

UNIT

http://en.wikipedia.org/wiki/Hydraulic_transmissionhttp://en.wikipedia.org/wiki/Hydraulic_transmissionhttp://en.wikipedia.org/wiki/Hydraulic_transmission

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1. HDRAULIC PUMP PRESSURE POWERMAXIMUM 2 Tons2. MOVING MECHANISMTWO SIDE MOTOR CONNECTION WITH WHEELS

COMPONENTS LIST WITH COST

1. HYDRAULIC PUMP2. LIFT MECAHNISM3. CAPACITOR4. CONTROL SWITCHES5. TRANSFORMER6. DIODE7. 12 V DC GEARED MOTORS 45 Rpm8.

12 V DC GEARED MOTORS 10 Rpm9. WOODEN BOXES

10.ASSEMBLY11.NUT & SCREW