Spring Characteristics and Force Tolerances of Gas Springs5482574
In contrast to most other types of springs, strut bracket use a built-in pretension force plus a flat spring characteristic. This means that there's only a small alteration in force between full extension and full compression.
As the piston and piston rod are pressed 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 really is reliant on the gas flow between the piston sides being able to move through channels within the piston throughout the stroke. Conventional gas springs use 'hydraulic damping', that involves a modest amount of oil slowing the pace with the stroke immediately prior to the spring reaches full extension. Thus giving the movement a braking character at the conclusion position so long as the piston rod is incorporated in the downward direction.
Force tolerances when charging with gas and other factors signify there could be variations inside the force exerted by gas springs with the exact same nominal value.
The nominal values apply at 20° C, the temperature where gas charging is done. Note that in the event the ambient temperature rises or falls, the force with the spring rises or falls depending on pressure modifications in the cylinder. Generally of thumb, gas spring force increases by approximately 3.5% per 10° C temperature increase and reduces accordingly when the temperature falls.