Contact type sealing structure suitable for supercritical carbon dioxide compression unit

Abstract

The invention discloses a contact type sealing structure suitable for a supercritical carbon dioxide compression unit. The sealing structure comprises a sealing body, first soft sealing tooth, a second soft sealing tooth, a shaft sleeve, a plurality of springs and a plurality of sealing teeth; the sealing body consists of an upper structure and a lower structure, wherein a clamping groove is formed in the bottom part of the upper structure, and the upper end of the lower structure is clamped in the clamping groove; one end of the springs is connected with the bottom part of the clamping groove, and the other end of the springs is connected with the upper end of the lower structure; the upper end of the sealing teeth, the upper end of the first soft sealing tooth and the upper end of the second sealing tooth are fixed on the lower end surface of the lower structure; the sealing teeth are located between the first soft sealing tooth and the second soft sealing tooth, and the shaft sleeveis located on the lower part of the sealing teeth, the first soft sealing tooth and the second soft sealing tooth. According to contact type sealing structure, the problem that the gap of the air seal is large due to the fact that the sealing teeth are worn by a rotor in the running process of the unit can be effectively solved, so that sealing effect is good.

Description

technical field [0001] The invention relates to a contact sealing structure, in particular to a contact sealing structure suitable for a supercritical carbon dioxide compressor unit. Background technique [0002] Thermoelectric conversion based on the supercritical carbon dioxide (S-CO2) Brayton cycle is an innovative and revolutionary power generation technology. The supercritical state of CO2 is easy to realize, and the turbine system equipment such as compressors and turbines using S-CO2 as the working medium is compact in structure and small in size, which can significantly reduce the construction cost of the power plant, realize modular construction technology, and thermoelectric conversion Compared with the traditional gas turbine, the efficiency is increased to 50%, and the equipment cost can be reduced by 20% compared with the traditional steam cycle. It is estimated that the cost of the power system can be reduced by 20% to 25%, and the economy of the power system c...

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the continuous improvement of parameters and single machine power, accidents have occurred almost every year due to serious friction between the dynamic and static parts, which has brought significant losses to the country and enterprises.

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