【摘要】：本文選擇偏航、變槳軸承作為研究對象,針對偏航、變槳軸承的運動特性構(gòu)建運動方程,以便準確地計算出其承受的載荷,為偏航、變槳軸承的壽命計算提供理論依據(jù)。研究偏航、變槳軸承的常見失效形式,并進一步分析偏航、變槳軸承的可靠性。 偏航軸承的受力分析較復(fù)雜,尤其是其運動過程中的受力分析,根據(jù)其同時受軸向力、徑向力和傾覆力矩的受力特點,偏航軸承一般采用單排四點接觸球軸承,變槳軸承則一般采用雙排四點接觸球軸承。 針對風力發(fā)電機用轉(zhuǎn)盤軸承的應(yīng)用條件討論在受軸向力、徑向力、傾覆力矩作用下正游隙的單排球轉(zhuǎn)盤軸承的載荷分布模型;針對變槳軸承一般采用負游隙的設(shè)計要求,研究彈性變形與負游隙之間的關(guān)系,并建立空載時負游隙條件下套圈變形的方程;研究偏航、變槳軸承在運動過程中的載荷分布,本文還討論計算偏航、變槳軸承的壽命方法:承載曲線法和當量動載荷法,并對兩種方法做對比;研究偏航、變槳軸承疲勞壽命的估算方法;總結(jié)偏航、變槳軸承的多種失效形式。給出對偏航、變槳軸承的滾道、螺栓、齒輪等關(guān)鍵部位校核的方法。 本文完成偏航與變槳軸承的運動方程構(gòu)建。在構(gòu)建過程中,分別依據(jù)偏航與變槳軸承不同的工況條件建立其空載、受載狀態(tài)下的運動方程。依據(jù)該運動方程可更準確地計算不同的偏航、變槳軸承內(nèi)部的載荷分布并準確計算承受最大載荷的滾動體的接觸應(yīng)力。為偏航、變槳軸承的壽命和可靠性奠定理論基礎(chǔ)。
[Abstract]:In this paper, the yaw and variable propeller bearings are chosen as the research objects, and the motion equations are constructed for the yaw and variable propeller bearings, so as to accurately calculate the load they bear and provide a theoretical basis for the calculation of the life of the yaw and variable propeller bearings. The common failure forms of yaw and variable-propeller bearings are studied, and the reliability of yaw and variable-propeller bearings is further analyzed. The force analysis of yaw bearing is more complicated, especially in the course of its motion. According to the stress characteristics of its axial force, radial force and overturning moment at the same time, the yaw bearing is generally used single row four-point contact ball bearing. Variable-pitch bearings are generally double-row four-point contact ball bearings. The load distribution model of single volleyball rotary bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed in view of the application conditions of rotary disk bearing for wind turbine, and the design requirement of negative clearance is generally used in variable propeller bearing, and the load distribution model of single volleyball rotary disc bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed. The relationship between elastic deformation and negative clearance is studied, and the equation of ring deformation under negative clearance under no-load is established, and the load distribution of yaw and variable propeller bearings in the course of motion is studied, and the calculation of yaw is also discussed in this paper. The life methods of variable propeller bearing are as follows: bearing curve method and equivalent dynamic load method. The two methods are compared; the fatigue life estimation method of yaw and variable propeller bearing is studied; and various failure forms of yaw and variable propeller bearing are summarized. The method of checking the key parts of yaw, pitch bearing, bolt, gear and so on is given. In this paper, the equations of motion of yaw and variable propeller bearings are constructed. In the process of construction, the equations of motion of yaw bearing and variable propeller bearing are established according to the different working conditions of the yaw bearing and the variable propeller bearing. According to the equation of motion, different yaw can be calculated more accurately, the load distribution in the bearing of the variable propeller and the contact stress of the rolling body bearing the maximum load can be calculated accurately. It lays a theoretical foundation for the life and reliability of the pitch bearing.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH133.3

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 賈平;偏航變槳軸承力學(xué)特性分析及結(jié)構(gòu)優(yōu)化設(shè)計[D];大連理工大學(xué);2012年

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本文編號：2200205