A tension spring is a helical coil spring designed to resist stretching forces, commonly used in tensioning mechanisms to maintain proper tension in mechanical systems.
A tension spring is a type of helical spring engineered to operate under tensile loads, meaning it stretches when force is applied and returns to its original length when the force is removed. In tensioning mechanisms, it provides consistent pulling force to maintain alignment, tension, or positioning of components such as belts, cables, or linkages. These springs typically feature hooks, loops, or threaded ends for attachment and are characterized by close-wound coils that separate under load.
诱因 → 失效模式 → 工程缓解
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Tension springs are designed to operate under tensile (pulling) forces and typically have hooks or loops for attachment, while compression springs work under compressive (pushing) forces and have plain ends. Tension springs are close-wound and stretch under load, whereas compression springs are open-wound and shorten under load.
The spring constant (k) is calculated using the formula k = Gd⁴ / (8D³N), where G is the shear modulus of the material, d is the wire diameter, D is the mean coil diameter, and N is the number of active coils. Alternatively, it can be determined experimentally by measuring force versus extension.
Common failures include fatigue fracture due to cyclic loading, permanent set from over-extension, corrosion in harsh environments, and hook/end failure from stress concentration. Proper material selection, design for fatigue life, and regular inspection can mitigate these issues.
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