Accumulator Flashcards
device that stores
the potential energy of an incompressible fluid held
under pressure by an external source against some
dynamic force.
accumulator
It is a vertically mounted cylinder with a large weight. When
the hydraulic fluid is pumped into it, the weight is raised.
Weight-loaded or Gravity Accumulator
stores energy in the form of a
compressed spring. The compressed spring then applies a
force on the piston that exerts a pressure on the hydraulic
fluid.
Spring-loaded
Accumulator
This type of accumulator delivers only a small volume
of oil at relatively low pressure
Spring-loaded
Accumulator
popularly used
in industries. Here the force is applied to the oil
using compressed air.
can be
very large and is often used with water or high
water-based fluids using air as a gas charge.
Gas-loaded Accumulator
oil and gas are
not separated. Hence, they are always placed vertically.
.Non-separator-type accumulator
oil and gas
are separated by an element. Based on the type of element
used to separate the oil and gas, they are classified as
follows
Separator-type accumulator
It consists of a cylinder with a freely floating piston with
proper seals. Its operation begins by charging the gas
chamber with a gas (nitrogen) under a pre-determined
pressure.
Piston-type accumulator
hydraulic fluid and nitrogen gas are
separated by a synthetic rubber diaphragm.
Diaphragm accumulator
same way as the other two
accumulators. Here the gas and the hydraulic fluid are
separated by a synthetic rubber bladder
Bladder accumulator
five basic applications where
accumulators are used in a hydraulic system:
Accumulator as an auxiliary power source
Accumulator as a leakage compensator
Accumulator as an emergency power source
Accumulator as a hydraulic shock absorber:
Accumulator as a thermal expansion compensator:
