Page 106 - 《橡塑技术与装备》英文版2026年2期

HINA R&P TECHNOLOGY AND EQUIPMENT

theoretical prediction model suitable for the contact width of
O-rings was established. Within the compression ratio range of
7.5% to 25%, multiple working conditions were selected for
verification. The results indicated that the average error of the
theoretical model was 5.9%, with a minimum error of 1.6%
and a maximum error of 10.9%.
(2) The contact width of the O-ring rubber seal increases
significantly with the increase in compression ratio; in
cases where there is little difference in Shore hardness, the
contact widths of O-rings with different hardnesses tend to
be consistent. This indicates that the compression ratio is a
key factor affecting the contact width of the O-ring, while the
Figure 8 Contact pressure diagram of O-rings with impact of hardness on the contact width is not significant when
different hardnesses there is only a small range of hardness variation.

(3) When the O-ring is compressed, an increase in
4 Conclusion compression ratio leads to an increase in both contact pressure
This study takes the O-ring used in a certain intelligent and equivalent pressure; the greater the material hardness, the
sliding sleeve as the research object and draws the following
higher the overall pressure level; the pressure fluctuates in the
conclusions:
early stage and tends to rise steadily in the later stage, with the
(1) By revising the Hertz contact theory and incorporating
variation patterns gradually becoming consistent.
the Mooney-Rivlin hyperelastic constitutive model, a

·62· Vol.52，No.2