Spring Characteristics and Force Tolerances of Gas Springs35573

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Contrary to almost every other type of springs, strut bracket have a integrated pretension force along with a flat spring characteristic. Which means that there's just a small alteration in force between full extension and full compression.

Because the piston and piston rod are pressed in to the cylinder, volume reduces and pressure increases. This makes pushing force to increase. In conventional gas-type springs, this increase is generally around 30% at full compression.


The pushing spring movement is slow and controlled. It is reliant on the gas flow between the piston sides being allowed to go through channels in the piston throughout the stroke. Conventional gas springs use 'hydraulic damping', which involves a small amount of oil reducing the speed from the stroke immediately ahead of the spring reaches full extension. Thus giving the movement a braking character by the end position provided the piston rod is incorporated in the downward direction.


Force tolerances when charging with gas along with other factors imply that there may be variations inside the force exerted by gas springs with the same nominal value.

The nominal values apply at 20° C, the temperature of which gas charging is done. Observe that when the ambient temperature rises or falls, the force with the spring rises or falls according to pressure changes in the cylinder. Generally of thumb, gas spring force increases by approximately 3.5% per 10° C temperature increase and reduces accordingly if the temperature falls.