Laser Quenching equipment
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Used for surface strengthening, repair, and remanufacturing of components, the coating has high adhe...
Flexible processing of complex curved sheet metal parts, with high cutting accuracy, fast speed, and...
Specially designed for seamless welding of precision plastic components, with a small heat affected ...
In the wind turbine generator system, the wind power blade root is the key part to bear the complex load, and it is easy to produce fatigue damage in long-term operation. By virtue of advanced process, the Dow automatic laser cladding equipment locally strengthens the blade root connection parts, greatly improving its performance.
As the key part connecting the blade and hub, the wind power blade root bears the static load generated by the dead weight of the blade for a long time, and the dynamic loads such as alternating bending and torsion under the action of wind. Under extreme working conditions, the peak value of instantaneous wind load can reach 3-5 times of the normal operating load, so the stress concentration at the blade root is obvious, and the fatigue crack and other damages are very easy to occur. Traditional repair methods have disadvantages such as low combined strength and poor corrosion resistance, which are difficult to meet the high reliability operation requirements of wind power equipment.
The Dow automation laser cladding equipment adopts high energy density laser beam to melt the special nickel-based and cobalt-based alloy powder instantaneously and form a compact metallurgical bonding layer on the blade root surface. The cladding layer shows excellent comprehensive performance: the micro-hardness reaches HV600-800, 2-3 times of the base material; Through the regulation and control of the nanocrystalline structure, the impact toughness of the cladding layer exceeds 80J/cm ², which is 40% higher than the traditional process. Based on the simulation analysis of ANSYS, the stress distribution uniformity at the blade root is increased by 65% after cladding strengthening, and the fatigue resistance is increased by 30% compared with the original state.
In the application practice of 2.5MW wind turbine blades in a coastal wind farm, Dow's technical team strengthens the vulnerable areas such as blade root T-shaped slot and bolt hole with gradient through accurate process parameter optimization. Through 6 months of operation monitoring, the root-mean-square value of vibration acceleration at the blade root is reduced from 12m/s ² to 9m/s ², and the vibration amplitude is reduced by 25%; Through real-time monitoring by acoustic emission detection system, no new crack is found. It is predicted according to ISO 10825 standard that the service life of the blade strengthened by laser cladding can be extended from 15 years to over 20 years under the working condition of average annual utilization hours of 2800h, the maintenance cost of single blade is reduced by 40%, and the economic benefit of the whole life cycle of wind power project is significantly improved.
