1. Weight comparison of the same size air spring
This method can be used to test the quality of the material used by the compressed gas spring. Some manufacturers use pipe wall thickness not up to the standard requirements of 1-4 mm. The related accessories of the inner guide sleeve are made of plastic, and the spring is only filled with high-pressure nitrogen, not filled with damping oil.
Hazards: The tube fitting is too thin, and the outer tube of the compressed gas spring is easy to be deformed, resulting in air leakage explosion. When the spring runs fast, the cylinder will overheat and damage the internal components.
2. Basic appearance check
High quality compressed gas spring from the production of the first step to the final packaging comply with ISO management standards, piston rod coating uniform, cylinder paint quality smooth, joint size standards.
Harm: if the coating and paint layer on the surface of the product is not well treated, the later stage will have the possibility of peeling off the paint, which not only affects the appearance of the product, but also, because the surface layer of the piston rod is not smooth, the internal seal will be damaged, affecting the service life of the gas spring.
3. Length of pressure rod at cylinder position of gas spring
The pressure rod of the spring wraps around the guide sleeve of the piston rod, which provides guidance and protection for the piston rod to enter the cylinder. The shorter the pressure rod, the shorter the guide sleeve.
Hazards: guide sleeve is too short, gas spring piston rod loosening will be greater, after a period of time will leak oil, affect the product life.
How to use compression gas spring correctly?
1. The use of compressed gas spring is not preloaded, because there is a gap in the spring to form a feeling, leading to the distortion of the spring. If there is preloaded, the spring is relatively stable.
2. Guide pins and springs will wear and break when compressed gas springs are applied horizontally.
3. Operation without spring guidance when using spring guidance, it is easy to form the distortion of the bottom and body of the spring. The high pressure of the deformed part is the main cause of the spring cracking, so it is necessary to use the inner diameter guide pin or outer diameter guide equipment.
4. Use more than a lot of tight (300000 - cycle, fitting with a long connection) : create pressure, and then form a selective depletion, when fitting with a long fitting closely connected, spring line will gradually close connection, as the fixed number of spring becomes higher, load curve will rise, spring will close because of high stress and crack, Do not use compression springs more than 300,000 times.
5. When the installation surface flatness is not good, the compression spring will distort deformation, some parts will crack under high pressure, when the parallelism is not good, more than 300,000 cycles after the spring will distort cracking, in the case of more than 300,000 cycles, do not improve the installation surface parallelism.
Ok, the knowledge points about how to detect gas spring in Tieying class are over. Thank you for your patience. See you next time.
Post time: Oct-24-2022
