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Load vs Deflection
When selecting a spring type for a given
application, it is important to consider
how the spring will load as it is deflected.
Friction, positive sealing and wear are
all variables that can be adjusted through
proper spring selection. As figure 1.7
shows, the Cantilever spring maintains a
linear relationship between spring
deflection and spring force and has a gradual
slope. This means that as spring
deflection increases, so does the force due to the
spring. Likewise, as the seal jacket
wears, the spring will decompress and
the spring force will fall off accordingly.
The Helical spring also displays a
linear relationship between spring force
and deflection but the slope of the line
is much steeper. This means that a
slight change in the deflection of the
spring will result in a dramatic change
in the spring force. The relationship between
spring force and deflection for the Offset Coil
spring is not linear. The flat section of the curve
for this type of spring allows for constant
spring force over a wide range of deflection.
This is a distinct advantage in friction
sensitive applications.
Click here to view Figure 1.7. |
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Introduction |
