Spring Characteristics and Force Tolerances of Gas Springs3159571
As opposed to most other types of springs, strut bracket use a integrated pretension force and a flat spring characteristic. This means that there's only a small difference 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 boost. In conventional gas-type springs, this increase is normally around 30% at full compression.
The pushing spring movement is slow and controlled. It is just a few the gas flow involving the piston sides being allowed to go through channels inside the piston throughout the stroke. Conventional gas springs use 'hydraulic damping', involving a tiny bit of oil slowing down the rate with the stroke immediately before the spring reaches full extension. This gives the movement a braking character at the conclusion position provided the piston rod is incorporated in the downward direction.
Force tolerances when charging with gas along with other factors signify there might be variations within the force exerted by gas springs with the same nominal value.
The nominal values apply at 20° C, the temperature at which gas charging is completed. Remember that in the event the ambient temperature rises or falls, the force with the spring rises or falls based on pressure changes in the cylinder. Usually of thumb, gas spring force increases by approximately 3.5% per 10° C temperature increase and reduces accordingly if the temperature falls.