What is the principle and working mode of hydraulic seal ring?

The hydraulic seal ring is a device that seals by preventing the leakage of liquid or gas. It is often used in hydraulic equipment, pneumatic equipment, automotive engines, mechanical equipment and other fields. The principle and working mode of the hydraulic seal ring mainly include the sealing principle, structural form, material selection and working process.

There are two sealing principles of the hydraulic seal ring, namely, the pressure seal principle and the friction seal principle. The principle of pressure sealing refers to the formation of a certain pressure between the sealing ring and the piston (or shaft), so that it is closely fitted with the sealing shell or sealing surface, so as to achieve the sealing effect. The principle of friction sealing refers to the existence of a certain friction between the hydraulic seal ring and the piston (or shaft), preventing the leakage of liquid or gas, so as to achieve the sealing effect.

The structure of the hydraulic seal ring is diverse, common O-ring, Y-ring, U-ring, V-ring and so on. O-ring is a kind of circular sealing element, widely used in various hydraulic equipment and pneumatic equipment, it is characterized by good sealing performance and large compression deformation ability. Y-ring is improved on the basis of O-ring, mainly used in high-pressure sealing occasions, with the advantages of large pressure, wear resistance. Compared with O-ring, U-ring has an edge sheath, which can better prevent the damage of O-ring under high temperature, high pressure and high speed conditions. V-ring is a sealing ring element with V-shaped groove, which can achieve a better sealing effect in a small radial structure space, and is often used for sealing hydraulic machinery and hydraulic cylinders.

The material selection of polyurethane hydraulic sealing ring is an important factor to ensure its performance and service life. Common hydraulic sealing ring materials are rubber, plastic, metal and so on. Rubber seals are widely used in various sealing fields, with good elasticity, wear resistance and corrosion resistance. Plastic sealing ring is mainly used for corrosion resistance, with good chemical medium resistance and high temperature resistance. The metal sealing ring is suitable for high pressure, high temperature, high speed and special working conditions, and has good pressure resistance and corrosion resistance.

The working process of the hydraulic seal ring mainly includes three stages: pre-tightening, sealing and leakage. Pretightness means that when the hydraulic seal ring is not working, the sealing ring maintains a certain prestructure by installing or applying a certain pretension force to ensure that a good sealing state is achieved during work. Sealing refers to the hydraulic seal ring at work, through the formation of a certain dense state between the sealing surface, so as to reduce or prevent the leakage of liquid or gas. Leakage refers to a certain degree of leakage in the work of the hydraulic seal due to various factors. The working process of the hydraulic seal ring needs to meet certain performance indicators, such as compression deformation ability, wear resistance, oil resistance and so on.

In short, the hydraulic sealing ring of the binding machine through the role of the sealing principle, combined with different structural forms and material selection, to achieve the sealing of liquid or gas, to ensure the normal operation of hydraulic equipment, pneumatic equipment, mechanical equipment, etc. In the working process, the hydraulic seal ring needs to have certain reliability, durability and performance indicators to meet the needs of various working conditions. With the progress of science and technology, the design and manufacture of hydraulic seals will tend to be more intelligent and efficient to improve work efficiency and reduce energy consumption.