We have already discussed the Hydraulic Accumulator and its operating mechanism. Today we need to understand, why we need hydraulic
accumulator in our hydraulic circuit ?
So let’s see the need of accumulators by studying the applications of hydraulic accumulators in hydraulic system.
So let’s see the need of accumulators by studying the applications of hydraulic accumulators in hydraulic system.
Provides the emergency Power
Hydraulic accumulator, fully charged, in our
hydraulic circuit will be able to provide sufficient pressure as well as flow in
order to complete the cycle or to position the actuators in a case when any
electric failure occur.
Works as energy storage device
Hydraulic accumulator will store energy by taking a
specified quantity of fluid under pressure and will release the pressure energy
when there will be requirement to perform a task in hydraulic system.
Fluid Leakage compensation
As we are aware that in hydraulic system, there are
lots of possibilities of internal leakage in various valves and in actuators
also. Accumulators will make-up the lost fluid due to fluid leakage.
Holds the pressure
Accumulator will hold the pressure in hydraulic
circuit, where actuators are used for performing a particular function, during
unloading or stopping of pump.
Reduces the line shock
Hydraulic accumulators will also reduce the line
shock especially at the discharge of pulsating piston pump and also reduce
shock in a line of having high velocity flow.
Avoiding cavitation in pump
Hydraulic accumulators are somewhere also used in
order to avoid the cavitation in pump and for this task, accumulators will be
located at the inlet of pump.
Image Courtesy : Google
Image Courtesy : Google
Reducing the noise level
Hydraulic accumulators are also used in order to
reduce the noise in hydraulic system which is basically produced due to complexities
of circuit, relief valves and piston pump.
Supplementing the pump flow
As we are aware that some hydraulic systems require
large volume of oil for a short period of time and after that hydraulic system
require no additional oil for a period of time.
Accumulator will be used in such cases for supplement the fluid flow of pump and hence accumulators could be used for reducing the pump size and motor size.
Accumulator will be used in such cases for supplement the fluid flow of pump and hence accumulators could be used for reducing the pump size and motor size.
There are some more applications of hydraulic
accumulators such as
- Compensating the contraction and expansion due to temperature
- Reducing the Response time
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