Anti-friction sealing ring

Abstract

The invention discloses an anti-friction sealing ring, and belongs to a sealing device. The anti-friction sealing ring comprises a Yx type sealing ring, wherein an anti-friction coating layer is coated on the sliding surface of the Yx type sealing ring; and the anti-friction coating layer is a polytetrafluoroethylene composite material coating layer. The anti-friction sealing ring is prepared from the following raw materials by the following steps of: adding copper powder with purity of over 99.7 percent and graphite powder with purity of over 99.85 percent into a 1.5 to 2 mass percent of KH-560 silane coupling agent and acetone respectively; performing ultrasonic oscillation; placing in a drying box, taking out after the acetone is evaporated, grinding and screening with a 200-mesh screen; heating PAN-based carbon fiber and preserving heat; oxidizing and cooling along with a furnace; mixing 6 to 8 percent of copper powder, 2 to 3 percent of graphite powder, 4 to 6 percent of carbon fiber and the balance of polytetrafluoroethylene powder and mixing in a ball mill; heating to melt and coating on the surface of the polyurethane Yx type sealing ring; and cooling and forming to form the anti-friction sealing ring. The anti-friction sealing ring has the advantages of simple structure, good sealing effect, small sliding friction coefficient and capability of reducing the sticking and slipping phenomenon of a hydraulic cylinder.

Description

technical field [0001] The invention relates to a sealing device, in particular to a coated anti-friction Yx type sealing ring, which is mainly suitable for hydraulic transmission systems. Background technique [0002] Sealing technology is a comprehensive technology combined with the application of multiple disciplines, which is closely related to fluid mechanics, material mechanics, elastic mechanics, tribology, chemistry, physical chemistry and thermodynamics. Although sealing technology is not a cutting-edge subject, it is often a decisive key technology, which determines the safety, reliability and durability of hydraulic system operation. [0003] The role of hydraulic cylinder sealing components in mechanical products is to prevent hydraulic cylinder leakage (including internal leakage and external leakage) and ensure the establishment of necessary working pressure. The quality of sealing components is directly related to the service life and operational reliability ...

AI Technical Summary

Problems solved by technology

However, the sliding friction coefficient of this kind of material is generally large, and there is a sticking phenomenon when the hydraulic cylinder is started, and the frictional resistance is large during operation, which increases the power consumption of the hydraulic system.

Although polytetrafluoroethylene (PTFE) and its composite materials, known as the "king of plastics", have a small sliding friction coefficient, their elasticity is not good. When used alone as a sealing ring material, automatic elasticity compensation cannot be well realized, and the sealing effect is poor.

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