A kind of coating used for compressor interstage sealing device

Abstract

A coating used for compressor interstage sealing devices, its composition and weight percentage content are: nickel powder with particle size ≤ 50nm not exceeding 35% but not zero, graphite powder with particle size ≤ 50nm: 60~90%, particle size ≤ 50nm silicon powder is not more than 5% but not zero. The present invention is based on the special requirements of the gas compressors of CCPP generator sets with by-product gas as fuel for domestic iron and steel enterprises on the performance of interstage sealing coatings, and provides a gas compressor that is rich in a large amount of benzene, naphthalene, tar, sulfide, etc. Under the condition of corrosive pollutants, it has good erosion resistance, wearability, self-lubrication and corrosion resistance, which can ensure the high sealing performance of the compressor during compression.

Description

technical field [0001] The present invention relates to a kind of coating, which belongs to a kind of coating used for compressor interstage sealing device. Background technique [0002] With the increasing development of aviation technology and the increasing shortage of energy sources, higher and higher requirements are placed on the efficiency of engines. According to data reports, in a high-pressure turbine, every time the gap between the blade and the casing is reduced by 0.13-0.25mm, the fuel consumption can be reduced by 0.5-1.0%, and the engine efficiency can be increased by about 2%. However, during the manufacture and operation of the engine, due to the thermal expansion of the engine components and the thermal deformation of the shaft, the high-speed rotation of the rotor, the blade elongation caused by centrifugal force, the tolerance of parts processing and the deviation of engine assembly, engine acceleration / deceleration and aircraft landing Due to the vibrat...

AI Technical Summary

Problems solved by technology

[0012] The compression medium of CCPP gas compressors in iron and steel enterprises is mainly the blast furnace and coke oven gas produced by iron and steel enterprises. The gas contains a large amount of corrosive pollutants such as tar, naphthalene, benzene, sulfide, water vapor and solid particles. During the compression process, the gas When the temperature rises above 500°C, traditional mid-temperature sealing coatings such as aluminum-silicon graphite and aluminum-silicon polyphenylene are processed by plasma spraying of high-resolution polymers and metal phase substances, and are more likely to be corroded during compression. Erosion, wear and oxidation make the organic active groups embrittlement, aging failure, and reduce the service life of the sealing coating