Hydraulic O - ring groove design - Dimensional tolerances

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2016-10-20 17:34:21

GB / T3672.1-2002 "Tolerances on rubber products - Part 1: Tolerances on dimensions" The high level of tolerance specified in the final application shall be used and shall be limited to those dimensions considered to be critical , The higher the precision used, the more stringent the control that must be exercised in the manufacturing Hydraulic O - ring groove design - Dimensional tolerances

The initial deformation (squeeze) of the hydraulic O-ring in the groove is necessary for its sealing action:

1. Obtain the initial seal contact stress

2, compensation product tolerance (in the gap with the connection of both)

3, to ensure a certain degree of friction; 4, compensation for permanent compression deformation (loss); 5, compensation wear.

For different applications, the hydraulic O-ring compression ratio "compression ratio = (O-ring diameter - groove depth) / O-ring diameter * 100%" pass as follows:

Dynamic Seal Application: 6% -20%

Static Seal Application: 15% -30%process, and therefore the higher the cost.

Hydraulic O - ring groove design - Dimensional tolerances

The initial deformation (squeeze) of the hydraulic O-ring in the groove is necessary for its sealing action:

1. Obtain the initial seal contact stress

2, compensation product tolerance (in the gap with the connection of both)

3, to ensure a certain degree of friction; 4, compensation for permanent compression deformation (loss); 5, compensation wear.

For different applications, the hydraulic O-ring compression ratio "compression ratio = (O-ring diameter - groove depth) / O-ring diameter * 100%" pass as follows:

Dynamic Seal Application: 6% -20%

Static Seal Application: 15% -30%

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