Multi-stage integral high-speed gearbox for supercritical carbon dioxide energy storage compressor passed the appraisal

On Feb 24-25,2025  the China General Machinery Industry Association organized a product prototype appraisal meeting in Nanjing for the "Multi-stage integral high-speed gearbox for supercritical carbon dioxide energy storage compressor (CLSX46861-ZH874.LPR.01.00)" independently developed by Nanjing Chuangli Transmission Machinery Co., Ltd. The appraisal meeting was chaired by Huang Li, President of the China General Machinery Industry Association.

Sui Yongbin, former chief engineer of China Machinery Industry Federation, served as the leader of the expert group of the appraisal committee, which was composed of experts from Nanjing Institute of Technology, CSIC 703 Research Institute, Hangyang Group, NGC, Nanjing University of Aeronautics and Astronautics, Jiangsu Zhanggu Liporui, etc. Experts and representatives of the appraisal committee visited the production test site of the R&D unit, witnessed some performance tests of the product prototype, listened to the technical summary report of the R&D unit, and reviewed relevant documents and materials.

After questioning and discussion, the expert group believes that the main innovations and technical features of the multi-stage integral high-speed gearbox for supercritical carbon dioxide energy storage compressors are as follows: an integrated structure of a multi-axis gearbox bearing seat and a box body vertical plate has been developed to improve the box body stiffness and the overall stability of the gearbox; end face teeth + hydraulic tension bolts are used to lock the impeller to reduce vibration, increase service life and facilitate maintenance; a conical thrust ring structure that bears axial loads is adopted, and the energy-saving technology of the gear booster guide kit is applied to reduce the oil consumption of the gearbox and improve transmission efficiency; the vacuum carburizing heat treatment process has been optimized, and special tooling has been developed to solve the problem of deformation of flat and thin gears during heat treatment; a high-speed arc spraying process has been developed, and the high-speed shaft journal seal is treated with composite material powder spraying to improve the wear resistance and sealing reliability of the journal under high temperature environments.

The appraisal committee believes that the developed multi-stage integral high-speed gearbox product prototype for the supercritical carbon dioxide energy storage compressor has independent intellectual property rights, and its main performance indicators have reached the advanced level of similar international products, and it is recommended to be promoted and applied.