Application structure and performance of hydraulic lip seal

Hydraulic seals are generally used in cylinder hydraulic sealing equipment, and are also a common component. The seal ring specification structure used in hydraulic seals can be divided into several types (models), and they can also be customized according to customer needs and seal sizes. Structure. Hydraulic seals are also a kind of lip-shaped rubber seals, which are mainly manufactured by superimposing O-rings and various types of seals. The various types of seals include U-cup seals and Y-shaped seals. , Square ring, J type ring, V ring and other special type YX hydraulic lip seals.

The sealing performance of the U-cup seals is better. The harder sealing material can prevent the sealing ring from twisting and eversion. It can also be used with a support ring. Its frictional resistance is large and increases with the increase of working pressure. Therefore, the seal is only suitable for hydraulic cylinders with low working pressure or low moving speed.

The Y-shaped ring maintains the seal by relying on its open lip close to the sealing surface. Generally used alone, it has good sealing performance, low friction resistance, good pressure resistance, good working stability and long service life. Because it is suitable for high-speed and high-pressure equipment, machine tools, and hydraulic cylinders.

The sealing performance of the V-ring is better. The number of sealing rings used can be determined according to the working pressure. Usually, the gland must be adjusted to compensate for the wear of the seal. Its fatal weakness is the complexity of the structure. The supporting ring, the sealing element and the pressure ring are formed in three parts, and the friction resistance is relatively large. The food special sealing material can be used in the field of food machinery.

YX u cup seals is a seal ring (lip seal ring) for shafts with a large section height and width. It is divided into a hole seal ring and a shaft seal ring. The sealing performance is the same. In addition to all the advantages of the Y seal ring, the seal The piece does not roll when used alone, which further improves its pressure resistance and working stability. Therefore, it is especially suitable for high-pressure, standard oil cylinders, injection machines, hydraulic presses, and hydraulic lifting platforms.

In the process of selecting and matching hydraulic seal management, engineering machinery personnel must deeply analyze the working principles and requirements of the system, and be proficient in the structure, sealing mechanism, material characteristics, and main performance uses of various hydraulic seals. Correctly select and match the hydraulic seals that meet the requirements to ensure the normal operation of construction machinery and improve the economic benefits of the enterprise.