The application scenario of O-ring tolerance mainly involves its installation, fitting, sealing performance and service life in practical applications. The following are the specific application scenarios:
First, ensure the accuracy of installation
Mechanical installation: In mechanical equipment, the O-ring needs to be installed in a specific groove or hole to form a seal. The existence of tolerances can ensure the precision of the fit between the seal ring and the groove or hole, avoiding the situation of too tight or too loose, thus ensuring the smooth installation.
Seal of shaft and hole: In the seal of shaft and hole, the tolerance of the O-ring can ensure that the gap between it and shaft and hole is moderate, neither because the gap is too large to cause leakage, nor because the gap is too small to cause installation difficulties or damage to the seal ring.
2. Ensure sealing performance
Static sealing: In static sealing scenarios, such as pipeline connection, container sealing, etc., the tolerance of the O-ring can ensure that it can be evenly deformed under pressure, so as to fill the small gap between the sealing surface and achieve a good sealing effect.
Dynamic sealing: In the dynamic sealing scenario, such as the sealing of the rotating shaft, reciprocating rod, etc., the tolerance of the O-ring can ensure that it maintains a stable sealing performance during the movement to prevent media leakage.
Three, extend the service life
Reduce wear: Proper tolerances can reduce wear during installation and use of O-rings, thereby extending their service life.
Prevent distortion: The reasonable tolerance design can avoid the distortion of the O-ring during installation and use, reducing the damage and leakage caused by distortion.
4. Meet specific industry standards
Automotive industry: In the automotive industry, O-type seals are widely used in engine, chassis, brake system, fuel system, lubrication system, cooling system and other parts. These parts have strict requirements on the tolerance of the sealing ring to ensure its sealing performance and service life.
Hydraulic industry: In the hydraulic system, O-type sealing ring is mainly used for piston rod, piston, cylinder and other parts. The hydraulic industry has high requirements for the pressure resistance, service life and oil resistance of the seal ring, and the design of the tolerance needs to meet these specific requirements.
Aerospace industry: In the aerospace sector, the requirements for sealing materials are extremely high. In the application of engine, fuel system, hydraulic system and other parts, the tolerance design needs to meet the sealing requirements under extreme conditions such as high temperature, high pressure, high-speed airflow.
5. Engineering drawings and procurement marking
Engineering drawings: Marking O-ring tolerances on engineering drawings ensures accuracy and consistency during manufacturing and installation.
Procurement labeling: When purchasing O-ring seals, labeling tolerances can ensure that the products provided by suppliers meet the design requirements and avoid returns or rework caused by business problems.
O-ring tolerances are used in a wide range of applications, including installation accuracy, sealing performance, service life, and meeting specific industry standards. In practical application, it is necessary to choose the appropriate tolerance range according to the specific use scenario and requirements.