Research on High-performance Grinding Ceramic Seals with On-line Electrolytic Dressing

Sealing is a common technical method in the industrial field. It cuts off, blocks or isolates the fluid (or medium) passage in the fluid delivery system and prevents the fluid from leaking out. Due to the constant flushing of fluid medium and changes in temperature, pressure, vibration, etc., if the sealing device works poorly, it will lead to seal failure, resulting in "running, running, dripping, and leaking" phenomena, resulting in loss of energy logistics and environmental pollution. Ceramic sealing is a new technology that uses engineering ceramic material seals to prevent leakage of fluid medium. It has been widely used in industrial products in recent years. Such as valve parts, the use of Al23, Si3N4, SiC and other engineering ceramic materials instead of metal seals (see), due to high hardness, high compressive strength, good wear resistance, and chemical stability, can be a good solution Metal seals frequently cause serious wear, poor sealing performance, and are prone to corrosion and require frequent maintenance and replacement.

Ceramic seals Although engineering ceramics have advantages and potentials that are unmatched by metals in the application of seals, it is precisely due to the high hardness and wear resistance of these materials that the dimensional and mass accuracy required for processing into seals More difficult than metal. Although the traditional grinding and polishing methods are the most important methods for processing ceramic parts at present, the processing cost is too low, resulting in high processing costs. At present, in the production of ceramic components, the processing cost accounts for 80% of the total cost, and even higher. Therefore, how to effectively reduce the processing cost is the key to the wide application of engineering ceramic materials in seals.

Erosionparticies Mechanism of cavitation erosion based on erosion particles and Quantitative estimation 1 Funded project of Natural Science Foundation of Fujian Province and Key Laboratory of High Temperature Structural Ceramics and Engineering Ceramic Processing Technology of Ministry of Education of Tianjin University