en.Wedoany.com Reported - Recently, the first domestically developed 15MW onshore wind turbine main gearbox, independently developed by CRRC Qishuyan Institute under CRRC, has officially entered mass production. The first two units off the production line have been fully assembled.
This major achievement not only sets a new world record for the single-unit capacity of onshore wind turbines but also signifies that the critical core technology of the "transmission heart" for ultra-large wind turbines has achieved true independent control, with overall performance reaching an internationally leading level.
Breaking the "Ceiling": A Technological Leap with 5x Output
From 3MW to 10MW, and now to 15MW, the power "ceiling" has been continuously broken, backed by years of technological breakthroughs.
The main gearbox is the true "transmission heart" of a wind turbine, precisely converting the low speed of the rotor (less than ten revolutions per minute) into the high speed required by the generator. With each step up in power, the torque the gearbox must withstand increases exponentially. Compared to the 10MW product, the 15MW gearbox's power has increased by 1.5 times, but the torque demand has surged to 1.8 times, posing extreme challenges to materials, design, processing, and assembly.
Overcoming Challenges: 10 "Strongmen" Exerting Force Evenly
The core technical difficulty of ultra-large gearboxes lies in ensuring that multiple planetary gears bear loads evenly under extreme operating conditions.
Through extensive simulation analysis and strict process control, the CRRC technical team ensures that all gears work in unison, guaranteeing product lifespan and reliability from the source. The mature, high-efficiency transmission structure has enabled the product to withstand multiple tests, including extreme operating condition tests, reliability bench tests, and compatibility verification by the turbine manufacturer.
In January this year, the product and its drivetrain system both won the industry award "Wind Power Leader · Best Component Product Award."
Technical "Weight Reduction": Shouldering Greater Torque with Lighter Weight
This product performs exceptionally well in lightweight design.
The 15MW wind turbine gearbox has successfully reduced weight by approximately 6% compared to similar models, weighing about 89 tons per unit, equivalent to a weight reduction of 5 tons. While torque has increased by 1.8 times, the weight increase has been controlled to around 1.5 times. Shouldering greater torque with lighter weight was the biggest challenge in the design process.
Additionally, the team completely overcame the challenge of uneven load distribution in the first-stage ring gear. Optimizations were made specifically for the special conditions of the "Desert, Gobi, and Barren Land" regions, characterized by large wind speed fluctuations and strong sand erosion, achieving a transmission efficiency of up to 98% under all operating conditions.
Green Energy Accounting: Single Unit Increases Annual Power Generation by Over 3 Million kWh
The application of cutting-edge technology ultimately translates into tangible green benefits. According to estimates, a single 15MW wind turbine can generate over 3 million kWh more electricity annually compared to the previous mainstream model, equivalent to saving approximately 960 tons of standard coal and reducing carbon dioxide emissions by about 2,000 tons per year. This means achieving several times the wind energy capture efficiency with less land occupation.
This article is compiled by Wedoany. All AI citations must indicate the source as "Wedoany". If there is any infringement or other issues, please notify us promptly, and we will modify or delete it accordingly. Email: news@wedoany.com
