Precision-machined grooves on forged steel piston rods designed to accommodate sealing elements for fluid containment and pressure maintenance in hydraulic/pneumatic systems.
Seal grooves are precisely engineered circumferential channels machined onto the surface of forged steel piston rods. These grooves serve as housing locations for various sealing elements (O-rings, U-cups, rod seals) that prevent fluid leakage, maintain system pressure, and exclude contaminants in hydraulic and pneumatic cylinders. The geometry, surface finish, and dimensional accuracy of these grooves are critical for proper seal function, longevity, and system efficiency.
诱因 → 失效模式 → 工程缓解
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Groove depth is most critical as it determines seal compression ratio. Insufficient depth causes inadequate sealing, while excessive depth can lead to seal extrusion under pressure.
Excessive roughness (Ra > 0.8μm) accelerates seal wear through abrasion, while overly smooth surfaces (Ra < 0.1μm) may prevent proper lubricant retention, increasing friction and stick-slip.
Minor damage can be repaired by precision machining to oversize dimensions with compatible seals. Severe damage typically requires rod replacement or thermal spray/weld repair with remachining.
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