Aging treatment and replacement of the seals of the air pump

Aging of the air pump seal can affect the normal operation of the equipment, leading to problems such as air leakage and reduced efficiency. Timely handling and replacement are required. The following are the specific methods for the aging treatment and replacement of seals:

First, analysis of the causes of sealing component aging

Influence of material properties:

Nitrile rubber is prone to hardening and cracking at high temperatures, while fluororubber can maintain elasticity at 120℃ for up to five years.

Seals are subjected to mechanical stress for a long time, and the increase in internal friction leads to an accelerated oxidation reaction, further intensifying aging.

The role of environmental factors

Temperature: For every 10℃ increase in ambient temperature, the lifespan of rubber seals shortens by 30%.

The medium: Hard particulate matter in the medium will enter the sealing surfaces of the dynamic and static rings, causing abnormal wear of the sealing surfaces. Impurities and scale will adhere to the sealing end faces, damaging their flatness and smoothness, and thus preventing the formation of a stable liquid film.

Chemical corrosion: In acidic or alkaline media, the surface of graphite rings, auxiliary sealing rings, etc. will be eroded, causing leakage at static sealing points.

Second, the treatment method for aging of sealing parts

Temporary repair measures:

Surface repair: For minor damage to the sealing surface, professional tools can be used for grinding and repair to restore the surface flatness.

Lubrication treatment: Apply high-concentration grease to the sealed contact surface to reduce the coefficient of friction and delay the development of leakage.

System optimization plan:

Temperature control: By installing radiators or optimizing the ventilation design, the working temperature is reduced to within the tolerance range of rubber materials.

Medium filtration: Multi-stage filtration devices are added at the air inlet to remove particles from the medium and reduce the wear of sealing parts.

Third, the operation process for replacing seals

Preparatory work:

Tool preparation: Equipped with torque wrenches, Allen wrenches, special disassembly tools for seals, etc.

Safety precautions: Wear protective gloves and goggles to ensure good ventilation in the operating environment.

Material confirmation: Verify the consistency of the model, material and size of the new seal with the original.

Disassembly steps:

Power and gas cut-off: Turn off the power supply of the air pump and release the system pressure.

Component removal: Disassemble the pump head, end cover and other components in sequence, and pay attention to protecting the threads and mating surfaces.

Removal of old parts: Use non-metallic tools to carefully remove the aged sealing parts to avoid damaging the sealing grooves.

Installation points:

Cleaning treatment: Use a non-woven fabric dipped in the special cleaning agent to thoroughly clean the sealing groove and mating surfaces.

Lubrication application: Apply grease compatible with the medium to the lip of the seal to reduce installation resistance.

Correct installation: Use a dedicated fixture to evenly press the seal into the sealing groove, avoiding twisting or flanging.

Torque control: Tighten the connecting bolts in stages according to the specified values to prevent the sealing parts from overloading and deforming.

Test verification:

Air tightness test: Fill compressed air to the rated pressure and check the leakage point with soapy water.

Performance test: Run the air pump and monitor whether the pressure and flow parameters meet the design requirements.

Load verification: Operate continuously for 2 hours under rated conditions to confirm no abnormal temperature rise or leakage.

Fourth, maintenance suggestions for seals

Regular inspection

Formulate a monthly inspection plan, with a focus on checking the appearance of the seals, the compression amount and the condition of the mating surfaces.

Establish a seal replacement file, recording the replacement time, model and operating parameters.

Inventory management

Stock commonly used specification seals to ensure that the inventory meets the usage requirements for three months.

Vacuum packaging is used to store the sealing parts to avoid direct contact with oil products and solvents.

Personnel training:

Conduct specialized training on the installation of seals, with a focus on explaining key processes such as torque control and lubrication requirements.

Case analysis of organizational seal failure to enhance the ability of operators to identify abnormal wear.