Nitrogen gas spring is one of the important basic parts in mechanical products. There are many types of it. According to the shape, it is divided into: spiral spring, plate (leaf) spring, disc spring, ring spring, flat (truncated cone) volute spring, etc.; according to the bearing characteristics: compression, tension, torsion spring, etc. . The stress that the nitrogen gas spring bears mainly includes: bending stress, torsion stress, tension and compression stress and composite stress. The main failure modes of nitrogen gas springs are: fracture, deformation, slack, and wear. The main analysis is fracture and deformation (relaxation).
1. Brittle fracture: most of the spring fractures are brittle fractures. Only when the working temperature is high, plastic fracture may occur. In engineering, fatigue fracture, stress corrosion fracture and hydrogen embrittlement fracture are called brittle fracture.
2. Fatigue fracture: the fracture of the spring under cyclic loading.
3. Stress corrosion fracture: the spring fracture is caused by the combined action of tensile stress and corrosive media.
4. Corrosion fatigue fracture: the fracture of the spring under the combined action of cyclic load and corrosive medium.
5. Hydrogen embrittlement, cadmium embrittlement, black embrittlement: brittle fracture caused by high impurity content in the spring material.
6. Wear: Wear is divided into: abrasive, fatigue and corrosion wear fracture.
