A curved tube that converts fluid pressure into mechanical displacement for pressure measurement in gauges.
The Bourdon tube is a fundamental sensing element in mechanical pressure gauges, consisting of a flattened, C-shaped or helical tube made from elastic materials. When internal pressure increases, the tube tends to straighten due to its cross-sectional geometry, creating proportional mechanical displacement at the sealed tip. This displacement is mechanically amplified through linkages to rotate a pointer on a calibrated dial, providing visual pressure readings. Bourdon tubes operate on the principle that pressure applied to the inside of a curved tube with non-circular cross-section causes it to deform toward a circular shape, generating measurable motion.
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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Bourdon tube gauges provide reliable, mechanical pressure measurement without requiring external power, making them suitable for hazardous environments and critical applications where electrical components might fail.
C-shaped tubes offer good sensitivity for moderate pressures, helical tubes provide greater tip travel for better resolution, and spiral tubes combine sensitivity with compact design for higher pressure ranges.
Repeated pressure cycling, pressure pulsations, vibration, and operation beyond recommended pressure ranges can cause material fatigue, leading to cracks or permanent deformation at the tube's root section.
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