Successful case of H-series right angle gearbox on offshore platforms

At present, the H-series right angle gearbox has been implemented on a large scale in multiple core marine engineering scenarios, such as FPSO floating production and storage platforms, offshore wind power construction platforms, and offshore nuclear power supporting marine facilities, completely breaking the long-term monopoly of imported products. HUNAN PERFECT industry, a leading manufacturer of H-series right angle gearboxes in China, has become a benchmark product for domestic substitution of marine equipment.
🚢  Nanhai Kaiping 11-4 Oilfield FPSO seawater lifting system project
This project is a major project for deepwater oil and gas development in the South China Sea, supporting the largest cylindrical FPSO platform in Asia and the second largest in the world. The total oil storage capacity of the platform reaches 122000 cubic meters, making it a crucial tool for deep-sea oil and gas development.
Pain points of the project: Previously, the right angle gearbox supporting the seawater lift pump on the platform was monopolized by European, American, and Japanese brands for a long time. The delivery cycle of spare parts was as long as 12 months, and corrosion failure occurred on average 18 months in high salt spray environments. The loss from a single unplanned shutdown exceeded 10 million yuan.
Landing configuration: Using domestically customized anti-corrosion H-series right angle gearbox, compatible with 800kW seawater lift pump, maximum flow rate of 2500m ³/h, shell made of 2205 duplex stainless steel material, rated axial thrust bearing capacity of 125000N, with more than 30% redundant alternating impact load reserved.
Operation effect: After being put into operation, it has been running continuously for more than 36 months without any faults. Its salt spray corrosion resistance life is twice that of imported ordinary models, and the procurement cost is only 40% of imported products. The delivery cycle of spare parts has been shortened from 12 months to 15 days, completely solving the pain point of lagging supply of spare parts for deep-sea platforms. It has become a demonstration project for the localization of CNOOC deep-sea equipment.
⚡  The 4th generation domestic self elevating offshore wind power construction platform "Port and Navigation Level 5" project
This platform is currently the offshore wind power installation platform with the highest lifting height and the strongest comprehensive performance in China. It is 135 meters long and 50 meters wide, with a lifting height of 168 meters above the deck and a pile leg length of 135 meters. It can meet the construction requirements of 26 MW and above ultra high power wind turbines.
Pain points of the project: The transmission components of the platform lifting system and seawater lifting system have long relied on imports, resulting in insufficient reliability under heavy load alternating working conditions, and high procurement and operation costs.
Landing configuration: Equipped with China's H series right angle gearbox, using multi-stage hybrid reduction transmission technology, the maximum output torque exceeds 2500 kN · m, the rated axial thrust bearing capacity is upgraded to over 125000N, and it is suitable for extreme heavy load impact conditions on the platform.
Operation effect: After the platform is officially delivered and put into operation in 2024, the gearbox system has been running continuously without faults for more than 18 months, fully meeting the long-term high load operation requirements of offshore wind power installation. Currently, this series of H-series right angle gearboxes has been widely promoted and applied to more than 10 similar offshore wind power platforms.
☢️  Guangxi Fangchenggang Hualong No.1 Nuclear Power Unit Offshore Circulating Pump Project
This project is the first Hualong One nuclear power unit in western China, and also the third independently owned third-generation nuclear power unit to be put into operation in China. The annual power generation of a single unit is nearly 10 billion kilowatt hours, and the supporting seawater circulation system belongs to a typical nearshore marine engineering scenario.
Pain point of the project: Previously, the gearbox used for nuclear power seawater circulation pumps relied entirely on imports, resulting in high procurement costs and long delivery cycles, which could not meet the national strategic requirements for independent and controllable nuclear power equipment.
Landing configuration: The domestically produced H-series derivative heavy-duty right angle gearbox is selected, with a design power of 7100kW. It adopts multi split herringbone gear transmission load sharing technology, and its large axial force test bearing capacity far exceeds that of similar imported products. It is suitable for high salt spray and high humidity environments in the ocean.
Operation effect: The gearbox has been running steadily since its commissioning in 2023 and has been widely used in more than 50 nuclear power units of China National Nuclear Corporation and China General Nuclear Corporation, occupying 95% of the H-series right angle gearbox market for circulating pumps in China. It has also been successfully exported to overseas nuclear power projects in Pakistan, achieving 100% autonomous control of core transmission components for marine nuclear power.
🌊  Exploration 3 seawater system project for offshore drilling platform in Bohai Bay
This platform is the main oil and gas exploration drilling platform in Bohai Bay, China, and has been operating in a high salt spray and high wave impact marine environment for a long time.
Pain point of the project: Under the alternating axial impact of waves, the original imported gearbox experienced thrust bearing burnout failure on average within 12 months, and the interruption of seawater supply directly led to the complete shutdown of the platform production system.
Landing configuration: The domestically produced H-series high thrust customized right angle gearbox is selected, matched with a full ocean anti-corrosion coating. The shaft end adopts IP56 level double sealing, with a rated axial thrust bearing capacity of 125000N, fully covering the maximum instantaneous axial load under wave fluctuations.
Operation effect: After the renovation and operation, the equipment has been running continuously for 48 months without major faults, and the shaft vibration value has remained stable below 2.7mm/s. The continuous fault free operation time of the equipment has been extended from 12 months to 48 months, and the annual operation and maintenance cost has been reduced by 70%. Currently, this plan has been promoted and renovated on more than 10 similar drilling platforms in Bohai Bay.