Open Access
Table 3
Compare with air spring in automotive suspension.
| Items | Air spring for mattress | Air spring for automotive suspension |
|---|---|---|
| Material | TPU thin film and fabric composite material | Vulcanized rubber (including cord layer) |
| Structure | Spherical cap structure without cover plate | Curved capsule structure with metal cover plate and ring band, Membrane structure with cover plate and piston. |
| Deformation | Spherical cap gradually becomes flat when compressed, the compression surface gradually increases, and the height gradually decreases. | Area of the cover was constant, height of chamber decreased, and chamber expanded outward. Height of the chamber increased with stretching and the chamber contracted inward. |
| Type of load bearing force | Only compression, no stretching, radial shear force can be ignored | Both pressure and stretching, radial shear force. |
| Vibration | Regardless of vibration | Vibration is the main working condition |
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