Flexible pressure-sensing element in pneumatic relays/amplifiers that converts input pressure into mechanical displacement.
The Input Diaphragm/Bellows is a critical flexible membrane component in pneumatic relays and amplifiers that responds to input pressure signals by deforming proportionally. This deformation creates mechanical displacement that actuates subsequent stages of the pneumatic system, enabling precise pressure amplification, regulation, or signal conversion. It serves as the primary sensing element that translates fluid pressure into mechanical motion.
诱因 → 失效模式 → 工程缓解
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Diaphragms are flat flexible membranes that provide linear motion, while bellows are convoluted cylindrical structures that offer greater displacement and stroke length. Bellows typically provide better sensitivity for low-pressure applications.
Temperature changes affect material elasticity and spring rate. Elastomer diaphragms expand/contract with temperature, requiring compensation. Metallic bellows have more stable thermal characteristics but lower flexibility.
Regular inspection for cracks, hardening, or permanent deformation. Replacement recommended every 3-5 years or when hysteresis exceeds 2%. Ensure clean, dry air supply to prevent contamination damage.
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