【Ten Years of Rapid Development in Chemical Engineering Equipment】Engineering prototypes of large submersible pumps from 1995 to 2023 passed appraisal by the China Petroleum and Chemical Equipment Industry Association

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Ten years of rapid development in chemical engineering equipment – praise for China’s prosperity and strength. This is just a starting point; more participation will make things even more lively. HaiChuan becomes even better with your involvement; we welcome everyone to join in the forum discussions. Everyone should focus on safety and know how to handle emergencies. ********************************************* On March 23, 2023, the China General Machinery Industry Association organized an evaluation meeting in Shenyang for the “large-scale submersible pump prototype” (VMG12×15×20-4), which was developed jointly by Shenyang Gear Pump Group Co., Ltd. and China National Petroleum Pipeline Bureau Engineering Co., Ltd. The meeting was chaired by Huang Li, president of the China General Machinery Industry Association. Sui Yongbin, former chief engineer of the China Machinery Industry Federation, served as the head of the expert panel of the appraisal committee; this panel was composed of experts from institutions such as China Consulting Corporation, Sinopec Guangzhou Engineering Company, Daqing Oilfield Construction Group, CNOOC Petrochemical Engineering Company, Shanghai Jiao Tong University, Northeastern University, the Fluids Research Center of Jiangsu University, and Shenyang University of Technology. The experts and representatives of the appraisal committee listened to the technical summary report submitted by the development unit, inspected the factory’s production testing site, viewed the prototype, witnessed some performance tests, and reviewed relevant documents and materials. The main innovations and technical features of this prototype include: the development of an efficient centrifugal pump hydraulic model through the study of blade loading methods to reduce pressure pulsations, as well as a method for matching flow in multi-stage spatial channels ； The motor and pump of the prototype are connected via a sleeve coupling, and the motor cooling system features a redundant design that combines internal forced circulation with end-mounted coolers, thereby enhancing the reliability of the unit’s operation ； Precision-grade metal matrix reinforced with polymer materials for water-lubricated, high-thrust, bidirectional thrust bearings has been developed, thereby extending the service life of these bearings ； A calculation method for the electromagnetic scheme of submerged motors was proposed, and through iterative optimization based on the coupling of multiple physical fields such as electricity, magnetism, heat, and mechanics, the optimal electromagnetic design scheme was developed ； Hermetically sealed connectors for high-voltage deep-sea cables based on polyurethane insulating materials have been developed, enhancing the safety of the insulation between the cable and the motor ； A rotor dynamics analysis method for dual-media, multi-modal, multi-support, and narrow-gap units was proposed. The analysis results, verified through experiments, meet the stability requirements for high-parameter operation of the units. The appraisal committee believes that the engineering prototype of the large submersible pump developed possesses independent intellectual property rights, and its key performance indicators are at an advanced level compared to similar international products; it is recommended that its widespread application be promoted.