Centrifugal compressor sealing device, centrifugal compressor and gas turbine

• Main Authors: BAI SHENGWEI, FU YUXIANG, ZHOU JING, CHEN YU, ZHONG YOULAN, LI CHENGQIN, SU YANG
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2020
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The invention discloses a centrifugal compressor sealing device, a centrifugal compressor and a gas turbine. The centrifugal compressor sealing device comprises a sealing part arranged between an impeller hub and a diffuser body; in the leakage flow direction of a working medium, the sealing part is arranged in front of sealing comb teeth; and the sealing part is arranged on the diffuser body andis of an annular structure, and the sealing part is provided with a working medium channel narrowing from wide to narrow so that pressure energy of the working medium flowing through the sealing partcan be converted into kinetic energy. According to the centrifugal compressor sealing device, the flow speed of the working medium is increased after the working medium flows through the sealing part,the pressure energy of the working medium is converted into kinetic energy, the static pressure of the working medium is reduced, then the working medium collides with the sealing comb teeth, most kinetic energy is dissipated,