风力机制动系统摩擦片的振动特性研究

为了降低风力机制动系统的制动振动,研究了风力机制动系统摩擦片的振动特性,针对某型风力机盘式制动器,考虑制动盘与内外摩擦片的接触耦合,以多自由度振动力学理论为基础,并结合库伦摩擦模型,建立了制动盘-摩擦片的六自由度动力学模型,研究了制动力和摩擦片材料对制动振动的影响,得到了内外摩擦片沿制动盘旋转切向方向和法向方向的振动位移曲线图和相图。结果表明:风力机在制动工作过程中,制动力越大,内外摩擦片在两个方向的振幅越大,振动趋势越强;在相同的制动力下,三种摩擦片中C/C纤维复合材料摩擦片的性能最好,振动幅度最小,达到振动稳定状态所用的时间最短。

Study on Vibration Characteristics of Friction Plate of Wind Turbine Braking System

In order to reduce the brake vibration of the wind turbine braking system,the vibration characteristics of the friction plate of the wind turbine brake system are investigated. Considering the contact coupling between brake disc and the internal and external?friction plate,a six-degree-of-freedom dynamic model of brake disc-friction plate is established for a certain type of wind turbine disc brake based on the multi-degree-of-freedom vibration mechanics theory and the Coulomb friction model. We study the influence of braking force and friction plate material on the braking vibration. The vibration displacement curve and phase diagram of the friction plate along the direction of the tangential direction and the normal direction are obtained. The results show that in the brake process of the wind turbine,the greater the braking force,the greater the amplitude of the friction plate in both directions,the stronger the vibration trend;Under the same braking force,the C/C fiber composite friction plate has the best performance of the three friction plates. The vibration amplitude of the C/C fiber composite friction plate is the smallest,and the time of reaching the vibration steady state motion is the shortest.