Atlas Copco Kit Composition and Functions
Core Components
Oil Seal (Frame Oil Seal): The core component of the kit, usually made of nitrile rubber or fluororubber, with a metal frame for reinforcement. It tightly adheres to the surface of the shaft through the lip, achieving dynamic sealing (preventing lubricating oil from leaking along the shaft end).
Shaft Sleeve (Sealing Sleeve): A metal sleeve attached to the main shaft and cooperating with the oil seal. The surface is hardened (wear-resistant) to reduce the wear of the lip and extend the service life of the seal.
Auxiliary Sealing Components: Including O-rings, retaining rings, etc., used for static sealing between the kit and the main housing to prevent edge leakage.
Some kits contain installation positioning components (such as guide sleeves), facilitating precise assembly.
Main Functions
Lubricant Leakage Prevention: Preventing the lubricating oil in the oil separator from leaking out through the shaft end gap to the outside (avoiding oil loss and environmental pollution).
Anti-pollution: Blocking dust and moisture from entering the main bearing chamber and the rotor meshing area, protecting the precision components from wear.
Pressure Maintenance: Assisting in maintaining the normal pressure in the oil separator, ensuring the stable operation of the lubricating oil circulation system.
Compatibility and Specifications
Compatible Models: The C55 kit is mainly compatible with specific models of Atlas Copco screw air compressors (such as some GA series and G series), and the specific matching needs to be based on the shaft diameter of the main unit and installation dimensions (usually corresponding to a shaft diameter of about 55mm, varying by model).
Material Characteristics: The rubber material of the oil seal needs to withstand the chemical corrosion of the compression oil and work temperatures of 80-100℃. The shaft sleeve is mostly made of high-carbon steel or stainless steel to ensure wear resistance and strength.
Replacement and Maintenance Tips
Replacement Timing
When observing obvious oil leakage or dripping at the shaft end, it is necessary to replace it in time (wear or aging of the lip of the oil seal is the main reason).
During major maintenance of the compressor (such as replacing bearings, main rotor), it is recommended to replace the entire sealing component at the same time (to avoid poor compatibility between new and old parts causing leakage).
Installation Precautions
Before installation, clean the shaft surface and the sealing groove of the housing, removing oil stains, rust, and impurities.
When installing the oil seal, use specialized tools to press it in, avoiding deformation or scratching of the lip (with the lip facing the lubricating oil side).
The shaft sleeve needs to ensure concentricity with the main shaft, and be in a proper interference fit to prevent loosening and wear during operation.
Maintenance Suggestions
Regularly check for oil leakage traces at the shaft end, especially after 10,000 hours of operation.
Ensure that the compressor oil meets specifications (to avoid accelerated aging of the oil seal due to inferior oil), and replace the lubricating oil according to the schedule.
