Seals for Clamping Technology: Dynamic Sealing Elements for High-Pressure Cylinders
In hydraulic clamping technology, seals (cups) perform the critical task of sealing between moving components, particularly in hydraulic cylinders and pump units. Since clamping systems often operate with extremely high static pressures, these sealing elements must guarantee absolute zero-leakage to keep the clamping force constant over long machining cycles. ABNOX seals are specifically designed for the requirements of high-pressure hydraulics and offer maximum security against pressure drops.
Technical Relevance and Functional Principle
Seals act as lip-activated gaskets, where the applied system pressure presses the sealing lip against the cylinder wall. The higher the pressure, the stronger the contact force and, consequently, the sealing effect. In clamping technology, these components must also be resistant to abrasive particles in the hydraulic oil and insensitive to load changes. Precise coordination of the seal geometry with the surface finish of the piston rod is a prerequisite for minimal friction coefficients and a long service life of the entire tribological chain.
Product Specification
Manufactured from high-performance elastomers or polyurethane compounds characterized by extreme dimensional stability and abrasion resistance. The seals are available for various cylinder diameters and pressure ranges in high-pressure clamping technology. They offer excellent resistance to mineral hydraulic oils as well as synthetic media. The geometry of the sealing edges is optimized to ensure reliable initial sealing even at minimum pressure and to prevent stick-slip effects.
Design Features and Material Quality
- Extrusion Resistance:
Use of materials with high Shore hardness or integrated back-up rings to prevent the seal from migrating into the sealing gap at high pressures. - Media Compatibility:
Validation of elastomers (e.g., NBR, FKM, or specialized PUR) for chemical resistance against additives in modern hydraulic fluids. - Temperature Resistance:
Operability across wide temperature ranges to ensure functionality under industrial continuous load conditions. - Low Frictional Resistance:
Surface finish and lip shape minimize mechanical friction, which reduces wear on the cylinder and increases response speed.
Process Reliability through High-Quality Sealing
The use of ABNOX seals (cups) minimizes the risk of uncontrolled workpiece loosening during the machining process. Due to high manufacturing precision, internal leakages in the clamping cylinders are prevented, which increases the efficiency of the high-pressure pumps used. Regular replacement of seals as part of preventive maintenance ensures system availability and protects against expensive consequential damage to the polished sliding surfaces of the hydraulic components. Consequently, these sealing elements form the foundation for permanently reliable clamping hydraulics.