High-pressure rubber hoses are pipes used to transport high-pressure liquids, gases, or oils, and are widely used in the automotive and industrial sectors. Their structure mainly consists of three parts: an inner rubber layer, a reinforcing layer, and an outer rubber layer. These three aspects will be introduced one by one below.
Inner Rubber Layer
The inner rubber layer of a high-pressure rubber hose is the part that directly contacts the transported medium; therefore, its materials and manufacturing process are crucial. Currently, styrene-butadiene rubber (SBR) or nitrile rubber (NBR) with a high polyester content are commonly used as the material for the inner rubber layer to ensure its oil resistance and wear resistance. Simultaneously, reinforcement measures such as steel wire winding are required during the production process to enhance the pressure resistance and explosion-proof capability of the inner rubber layer.
Reinforcing Layer
The reinforcing layer of a high-pressure rubber hose is generally reinforced using methods such as steel wire braiding or spiral winding. This effectively improves the pipe’s pressure resistance and tensile strength, preventing breakage or bursting during the transport of high-pressure liquids, gases, or oils. At the same time, the reinforcing layer also maintains the shape and stability of the pipe, preventing deformation or twisting under high-pressure environments.
Outer Rubber Layer
The outer rubber layer of high-pressure rubber hoses is typically made of materials with high polyester content, such as styrene-butadiene rubber or nitrile rubber, to improve the pipe’s wear resistance and corrosion resistance. In addition, special materials such as silica and carbon black are added during the production process to increase the friction coefficient of the pipe surface and reduce its surface temperature.
In summary, the structural principle of high-pressure rubber hoses mainly includes three parts: the inner rubber layer, the reinforcing layer, and the outer rubber layer. The inner rubber layer is in direct contact with the transported medium, therefore its materials and processes must meet high requirements. The reinforcing layer effectively improves the pipe’s pressure resistance and tensile strength, and maintains the pipe’s shape and stability. The outer rubber layer improves the pipe’s wear resistance and corrosion resistance. When selecting high-pressure rubber hoses, it is necessary to comprehensively consider factors such as materials, processes, and structure to ensure that the selected hose meets requirements and has good durability and reliability.