一种低温抗脆裂的星形密封圈加强筋结构
By designing a W-shaped star-shaped sealing ring with reinforcing ribs, the problem of rubber fatigue cracking caused by assembly stress concentration was solved, the sealing ring's anti-brittle fracture performance at low temperatures was achieved, and the service life of the sealing ring was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHONG SANLI PETROCHEMICAL MASCH CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing star-shaped seals require the skeleton arc end to be expanded or the rubber to be deformed during assembly, resulting in initial assembly stress. Furthermore, under reciprocating motion and pressure fluctuations, stress concentration is easily generated at stiffness abrupt change points and gap areas, leading to rubber fatigue cracking.
A low-temperature resistant star-shaped sealing ring reinforcing rib structure is designed. The horizontal connecting part and the arc part of the W-shaped structure are matched with the arc-shaped inner wall of the cavity. The gradual thickness and curved surface design eliminate assembly deformation, avoid stress concentration, and reduce the probability of rubber fatigue cracking.
By using a smooth arc connection and a gradient thickness design, the probability of assembly jamming is reduced, stress is transmitted evenly, the risk of low-temperature brittleness of rubber materials is reduced, and the life of the sealing ring is extended.
Smart Images
Figure CN224515916U_ABST
Abstract
Claims
1. A low temperature, brittle fracture resistant, star seal bead stiffener structure comprising: A sealing ring (1) and a reinforcing rib (2) are provided. The sealing ring (1) has an annular cavity (101) corresponding to the reinforcing rib (2). The reinforcing rib (2) is located in the annular cavity (101). The reinforcing rib (2) includes a horizontal connecting part (201) and a limiting reinforcing part (202) connected to both ends of the horizontal connecting part (201). The thickness of the horizontal connecting part (201) gradually increases from both ends to the middle. The upper and lower sides of the horizontal connecting part (201) are curved surfaces. The vertical cross section of the limiting reinforcing part (202) is a W-shaped structure. The limiting reinforcing part (202) includes a first arc-shaped part (2021) connected to the end of the horizontal connecting part (201) and two second arc-shaped parts (2022) respectively connected to the first arc-shaped part (2021). The vertical cross section of the first arc-shaped part (2021) and the two second arc-shaped parts (2022) are both semi-circular structures.
2. The low temperature, brittle fracture resistant, star seal bead reinforcement structure of claim 1 wherein, The inner wall of the annular cavity (101) is provided with a plurality of annular grooves (100), and the vertical cross section of the annular grooves (100) is a fan-shaped structure.
3. The low temperature, brittle fracture resistant, star seal bead reinforcement structure of Claim 1 wherein, The sealing ring (1) includes a rubber matrix (102) and four protruding sealing lips (103) located on the side of the rubber matrix (102). The annular cavity (101) is disposed inside the rubber matrix (102).
4. The low temperature, brittle fracture resistant, star seal bead reinforcement structure of claim 3, wherein, Both the rubber matrix (102) and the convex sealing lip (103) are annular structures. The annular cavity (101) is located inside the rubber matrix (102). The vertical cross-section of the rubber matrix (102) is rectangular. The convex sealing lip (103) is connected at the corner of the rectangular structure. The vertical cross-section of the convex sealing lip (103) is fan-shaped. The arc of the fan-shaped structure is a dominant arc. The side of the rubber matrix (102) is provided with an arc-shaped concave transition portion (104) corresponding to the two adjacent convex sealing lips (103).
5. A low temperature, brittle fracture resistant, star seal bead stiffener structure according to claim 4 wherein, The outer circumferential array of the convex sealing lip (103) has multiple anti-slip protrusions (105), and the vertical cross section of the anti-slip protrusions (105) is an elliptical structure.
6. The low temperature, brittle fracture resistant, star seal bead reinforcement structure of claim 3 wherein, The convex sealing lip (103) is provided with an installation cavity (106), the installation cavity (106) is provided with a thin-walled annular tube (107), and the inner wall of the installation cavity (106) is provided with a plurality of annular recesses (108), the annular recesses (108) coincide with the axis of the convex sealing lip (103).