Alternatively, improve the fan bearing life

Alternatively, 2020 - fan bearing life 04 - 29 October 21 to 24, 2019, 2019 Beijing international wind energy conference and exhibition ( CWP 2019) Was held in Beijing. As the world's wind power industry one of the biggest annual event, Beijing international wind energy conference and exhibition held in Beijing for the first time since 2008 has been successfully held the 11th. Around the energy transformation, market trends, technology development, such as theme, this year's wind energy conference also held more than 20 points and BBS. Timken bearing as the only manufacturer in academic BBS on October 23, a keynote speech. 2019 Beijing international wind energy conference and exhibition opening ceremony of the bearing is one of the most important parts in the fan, the operating requirements faced with severe challenges. Huge, complex and changeable load, difficult maintenance and high maintenance costs require fan main shaft bearing in has excellent comprehensive carrying capacity at the same time with strong reliability and durability. Timken submit the conference paper, comparing the traditional three support call roller spindle bearing plan, detailed elaborated the timken claim double row circular cone roller bearings scheme applied in fan of great strength. Timken jiera, chief engineer of China at the scene of the BBS speech early small mw fan widely used single spherical roller bearing spindle scheme ( Three bearing type) 。 As the fan capacity and complexity of ascension, the spindle solutions by other gradually, such as double spherical roller bearing, Four-point bearing type) , double row taper roller bearings and cylindrical roller bearing, double row taper roller bearings and large size are becoming more common in large mw fan replaced two single row circular cone roller bearings. For installed wind field three-point supporting type of spherical roller bearing performance of tracking also show that the scheme under load and changeable conditions, the worst of the spindle bearing lubrication conditions inherent in the roller and raceway contact surface sliding friction intensified surface wear, flake formation micro, eventually into bearing spalling damage accumulation. This kind of micro spalling is very difficult to avoid, but the impact on the bearing life is significant. Multiple wind field a variety of supporting fan in three main bearing performance statistics and damage performance is also verified this problem. Three type bearing installation of spherical roller bearing damage such damage mechanism makes the tapered roller bearing in the location of the application advantages are increasingly highlighted. In the spindle end, Timken® Double inner ring of tapered roller bearing can be under the condition of complex wind kept between roller and raceway, pure rolling motion in reducing friction and improve the performance of the bearing lubrication in harsh conditions. At the same time, the spindle taper roller bearing with axial pre-tightening axial deformation of the spindle can be greatly reduced and channeling, thereby reducing variable wind load on the impact of the gear box, improved the working condition of the gearbox bearing, to improve the service life. Double inner ring of tapered roller bearing and spherical roller bearing structure contrast double inner ring of tapered roller bearing and spherical roller bearing performance comparison based on GE1. 6/1. 7 mw wind turbines can be seen as an example to analyze the running performance of, double inner ring spherical roller bearing is higher than that in circular cone roller bearings and the life of a lower contact stress. In order to verify the taper roller bearing these advantages, in the United States timken chose three 1 in different locations. 5 mw wind turbines on hang machine run the test, there are also installed the spherical roller bearing fan running in adjacent position. After two years of operation, one set of bearing in fan offline development were removed, timken opportunity for a comprehensive test. Remove the waiting for inspection of the tapered roller bearing raceway geometry size and the two sides of the test results of grease, tapered roller bearings after two years of operation, raceway normal wear and tear, and meet the design requirements of performance. In the impact of the operation process of three prototype testing pulse vibration and axial channeling dynamic/deformation, according to the results with a preloaded tapered roller bearing is superior to the standard spherical roller bearing with wind field, well realize the design expectations. For two is still in the running of the prototype, which is installed in 2018 to run three years later, with endoscopy bearing raceway found in good condition. Endoscopy showed the race in good shape on the whole, for three support type of spindle, with belt preloaded tapered roller bearing can be directly without change other parts to replace the original spherical roller bearing. From bearing the inherent movement mechanism, performance analysis and prototype test results are shown tapered roller bearing as upgrade scheme, can effectively solve the problem at present main bearing performance of the unit in service, provides the technical transformation of existing units with new ideas. As the authority of the tapered roller bearings, timken actively participating in global wind power equipment research and development, provide full lifecycle solutions for fan. With independent research and development of engineering analysis system Syber advanced analysis system, and the cooperation between the engineering team, timken for micro wear vibration damping and noise reduction, engineering coating and the different application requirements to provide the most suitable bearing solutions. In addition, through the bearing replacement, repair services and lubrication system, timken fan users to provide a full range support, improve equipment performance and reliability in the largest extent. （ Source: timken)