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I. Working Principle (How to Achieve Vibration Isolation and Absorption)

• Materials: High-damping elastic gaskets such as rubber, silicone rubber, and metal rubber inside the clamp.

• Mechanism:

• Vibration Conversion: Pipeline vibration → repeated compression, shear, and stretching deformation of the gasket.

• Energy Dissipation: Molecular friction inside the material and interface friction between the material and the pipeline wall/clamp convert kinetic energy into thermal energy for dissipation.

• Transmission Blocking: Form an elastic layer to prevent vibration from propagating from the pipeline to the bracket/wall, or from the equipment to the pipeline.

• Allow axial expansion and contraction, radial offset, and small-angle deflection of the pipeline (three-way flexibility).

• Absorb displacements caused by thermal expansion and contraction, equipment vibration, and foundation settlement, and avoid stress concentration and resonance amplification.

• Traditional welding/flanges are rigid connections (resisting stress rigidly); clamps adopt a flexible approach to overcome rigidity (vibrations are buffered and absorbed).

• Metal Clamps: Provide uniform radial clamping to ensure the gasket remains attached and does not loosen.

• Gap/Groove Design: A small gap is reserved at the pipeline end to further block the linear propagation of structure-borne sound and vibration waves.

II. Main Functions (Effects) of Vibration Isolation and Absorption

1. Reduce Vibration Transmission Rate

2. Significantly reduce the propagation of equipment vibrations (such as pumps, compressors, and fans) along the pipeline.

3. Reduce pipeline resonance, lower pipeline stress, and prevent fatigue fracture.

4. Noise Reduction (Structure-Borne Sound Isolation)

5. Block structure-borne noise (pipeline vibration → bracket → wall → indoor noise).

6. Significant noise reduction effect for pipelines in machine rooms, pump rooms, and buildings.

7. Protect Pipelines and Equipment

8. Buffer impact, water hammer, and pulsation to protect welds, valves, and instruments.

9. Extend the service life of pipelines, seals, and equipment.

10. Adapt to Dynamic Working Conditions

11. Suitable for scenarios with vibration, settlement, thermal expansion, and displacement (subways, bridges, ships, high-rises).

III. Typical Structures (Vibration Isolation Clamps)

• Clamps with Rubber Gaskets (Standard Vibration Isolation): Metal clamp body + nitrile/EPDM/silicone rubber gasket (most commonly used).

• Metal Rubber Clamps (High Temperature/Heavy Load): Porous sintered metal wire material, dry friction damping, high and low temperature resistance, and long service life.

• Clamp-Type Flexible Pipe Joints (Grooved Type): C-type/O-type rubber ring + two-piece clamp, integratingconnection + vibration isolation + compensation.

• Damping Hoops/Particle Damping Clamps: Built-in damping particles for multi-dimensional and efficient vibration reduction (strong damping at medium and low frequencies).

IV. Application Scenarios

• Building Water Supply and Drainage, Fire Protection: Vibration isolation and noise reduction for pump rooms and risers

• HVAC Air Conditioning Water Pipes/Air Ducts: Vibration isolation for fans and water pumps

• Marine/Offshore Engineering: Wave vibration and salt spray environment

• Aerospace Hydraulic Pipes: High damping and resistance to vibration fatigue

• Automotive/Construction Machinery: Shock absorption and anti-loosening for engines and pipelines

• Chemical/Petroleum: High temperature, corrosion, and pulsation working conditions

V. Comparison with Rigid Connections

VI. Key Factors Affecting the Effect

• Gasket Material: Damping coefficient, hardness, temperature/medium resistance (nitrile, EPDM, silicone rubber, metal rubber).

• Preload: Loose preload leads to failure; excessive preload crushes the elastic layer (losing vibration isolation effect).

• Clamp Spacing: The longer the pipeline and the greater the vibration, the denser the spacing (denser support results in less vibration).

• Structural Form: Flexible > Rigid; With gasket > Without gasket.