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Spring-Loaded Accumulator: This accumulator is used in some
engineer equipment hydraulic systems. It uses the energy stored in springs to
create a constant force on the liquid contained in an adjacent ram assembly. The
illustration below, shows two spring-loaded accumulators. The load
characteristics of a spring are such that the energy storage depends on the
force required to compress the spring. The free (uncompressed) length of a
spring represents zero energy storage. As a spring is compressed to the maximum
installed length, a minimum pressure value of the liquid in a ram assembly is
established. As liquid under pressure enters the ram cylinder, causing a spring
to compress, the pressure on the liquid will rise because of the increased
loading required to compress the spring.
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