In hydraulic transmission systems, various components and mechanisms are in a closed state, and it is extremely difficult to troubleshoot if problems occur. This type of failure is often caused by one of the components being damaged and stopping working. Seals are the key to protecting engineering components and hydraulic systems, so their reliability often becomes the focus of attention for engineers. The reason why rubber can be used as an important sealing material is because of its strong compressive and anti deformation properties, which can prevent leakage of pressure media. At present, rubber sealing technology is applied in high-tech industries such as aerospace and petrochemicals in China. Therefore, the environmental adaptability of rubber is very high. In order to effectively ensure the normal operation of mechanical equipment, staff must attach great importance to the design and development of rubber sealing structures. Because often it is due to unreasonable rubber materials or structures that seal failure occurs, which has a significant negative impact on engineering operations. This article elaborates on this issue in detail, in order to provide some reference and inspiration for strengthening the safety and rationality of rubber seal design.

The main forms of sealing failure of rubber seals are as follows:

1) Aging, with the passage of time, the strength, compressive strength, and resistance to deformation of seals gradually decrease, and rubber seals begin to harden or become brittle;

2) Wear and tear, due to the fact that seals are mainly used in machinery that rotates with shafts, scratches may appear on the surface, and there are grooves of varying depths;

3) Damage, deformation of the lip of the seal, surface damage, local fracture, ultimately leading to seal failure;

4) Distortion, partial flipping of rubber ring seals, resulting in grooves or protrusions;

5) Expansion occurs when the lip of the seal begins to soften, become sticky, or partially peel off;

6) Erosion, carbonization of the lip of the seal, erosion of the support ring, and failure of the rubber seal.