In everyday use, the fan subject to wear is more common phenomenon. This is because the fan is running at an environment containing solid particles, the solid particles into the air along with the impeller, it will cause some wear on the impeller, and the particles are deposited on the impeller, it will affect the mechanical properties of the fan for a long time down, will shorten Fans of life, but also lead to serious accidents. Therefore, improving the gas-turbine wear resistance, is a serious problem.
And what kind of wind opportunity to more wear it? To solve this problem, I consulted the experts Warwick fan. Experts said that fans wear mainly on the hardness of the shell. Because of the high hardness of the shell, we can adapt to high temperatures and vibration conditions, and withstand high temperature, test work long hours. "If this point of view, high hardness PP plastic, is ideal as a fan casing material."
It is understood that Warwick GM Series PP plastic fan technology, high hardness properties make anti-throw performance and wear performance of wind turbines has further improved, and also because the PP plastic is one of the lightest plastic, so fans than Ordinary fans are more lightweight.
"However, depending on the operating conditions of the fan, wear characteristics and wear it on the impeller has a different cause," Warwick expert told the author, "fan wear phenomenon contains many complex factors, it is often the result of the combined effects of multiple mechanisms . "So, for the use of different types of fans, manufacturers should be different wear technology.
So, for the different forms of wear, which wear may be such a technical expert opinion?:
1, surface treatment of the impeller
Impeller surface carburizing, plasma welding, spraying carbide, ceramic paste processing. These methods of increasing the hardness of the surface of the impeller, which to some extent, improve the wear resistance of the impeller.
2, surface coating wear-resistant coating
This method is simple, low cost, but faster wear coating, once about the use of 3 to 5 months.
3. Improved impeller structure
The impeller can be processed into a sawtooth, or the like plus welding wear blocks, which can reduce the wear of the impeller to some extent.
4, the front wear Cascades
After installation of the most easy to wear wear cascade can prevent the particles back plate and blade root flow, which will focus on the wear particles into a uniform wear, improved impeller wear, extending the life of the fan.
5, to improve aerodynamic design
Rational use of the fan inlet shape, the design should ensure minimum inlet relative speed of the impeller, minimizing the number of revolutions fan, select the appropriate shape of the impeller, the blade inlet to the outlet of the curvature radius of curvature from small gradually, this can reduce the impact of solid particles and the chance of the impeller.
6, the use of efficient dust removal device
Timely to fan dust, the fan can operate in the purification of the gas stream, thereby reducing the degree of wear.