本文選題：風(fēng)電液壓缸 + 自鎖裝置��； 參考：《濟(jì)南大學(xué)》2017年碩士論文

【摘要】：液壓缸是風(fēng)電機(jī)組液壓調(diào)槳系統(tǒng)的核心組成部件,其性能好壞直接影響整個液壓調(diào)槳系統(tǒng)的可靠性和穩(wěn)定性。本文結(jié)合國內(nèi)外液壓缸和液壓鎖的發(fā)展,依據(jù)風(fēng)電機(jī)組調(diào)漿系統(tǒng)的工作要求,設(shè)計了一種新型液壓缸-自鎖風(fēng)電液壓缸。該類型液壓缸擁有斷電自鎖裝置和緩沖裝置。利用結(jié)構(gòu)創(chuàng)新設(shè)計,液壓缸斷電自鎖裝置既可以實現(xiàn)油缸在負(fù)載情況下任意位置的可靠鎖止,又可以保證工作過程中的可靠解鎖;緩沖裝置可以保證風(fēng)機(jī)槳葉在規(guī)定時間內(nèi)制動的情況下降低其承受的載荷,避免槳葉損壞。本文首先設(shè)計了自鎖風(fēng)電液壓缸的結(jié)構(gòu)并進(jìn)行了分析,進(jìn)而通過理論分析、仿真分析和結(jié)構(gòu)優(yōu)化,驗證液壓缸的性能。具體研究內(nèi)容如下:根據(jù)設(shè)計要求,首先是對自鎖風(fēng)電液壓缸的結(jié)構(gòu)設(shè)計。通過理論計算確定缸筒壁厚和外徑等主要參數(shù),并利用有限元仿真分析的方法對結(jié)構(gòu)參數(shù)進(jìn)行強(qiáng)度、剛度校核;在結(jié)構(gòu)參數(shù)優(yōu)化分析的基礎(chǔ)上,完成了自鎖風(fēng)電液壓缸活塞結(jié)構(gòu)、自鎖裝置以及緩沖裝置的設(shè)計;利用SolidWorks軟件建立自鎖風(fēng)電液壓缸的實體模型,為后續(xù)性能分析和優(yōu)化奠定基礎(chǔ)。其次是自鎖風(fēng)電液壓缸的性能分析。研究液壓缸在極端軸向載荷(極端推載荷和極端拉載荷)、徑向載荷的作用下液壓缸的變形及各部件的應(yīng)力分布規(guī)律,得到液壓缸的極限承載性能。再次進(jìn)行斷電自鎖裝置結(jié)構(gòu)參數(shù)分析及優(yōu)化。利用自鎖裝置自鎖狀態(tài)下的受力分析,得到夾緊力的理論計算公式,進(jìn)一步通過MATLAB軟件分析自鎖裝置結(jié)構(gòu)參數(shù)對夾緊力的影響并進(jìn)行參數(shù)優(yōu)化;利用ANSYS Workbench軟件對缸體關(guān)鍵部件進(jìn)行剛度、強(qiáng)度分析,檢驗其可靠性;利用ANSY Workbench仿真分析自鎖裝置的夾緊力及其影響因素,驗證自鎖裝置鎖緊的可靠性。最后研究液壓緩沖裝置性能。主要是緩沖裝置性能的理論研究,包括理論分析模型建立、緩沖特性曲線分析以及對緩沖過程影響的理論分析,為仿真分析提供前提條件;通過Fluent軟件對緩沖裝置性能仿真研究,觀察緩沖過程中的壓力變化以及研究了結(jié)構(gòu)參數(shù)對緩沖性能的影響,為緩沖裝置的設(shè)計和選型提供指導(dǎo)。
[Abstract]:Hydraulic cylinder is the core component of hydraulic governing system of wind turbine. Its performance directly affects the reliability and stability of the whole hydraulic governing system. Based on the development of hydraulic cylinder and lock at home and abroad and according to the working requirements of sizing system of wind turbine, a new type of hydraulic cylinder, self-locking wind power hydraulic cylinder, is designed in this paper. This type of hydraulic cylinder has power-off self-locking device and buffer device. With the innovative design of the structure, the self-locking device of the hydraulic cylinder can not only realize the reliable locking of the cylinder at any position under load, but also guarantee the reliable unlock in the working process. The buffer device can ensure that the fan blade can reduce the load and avoid the damage of the blade under the condition of braking within the specified time. In this paper, the structure of the self-locking wind power cylinder is designed and analyzed, and the performance of the hydraulic cylinder is verified by theoretical analysis, simulation analysis and structural optimization. The main contents are as follows: according to the design requirements, the structure of self-locking wind power cylinder is first designed. The main parameters such as cylinder wall thickness and external diameter are determined by theoretical calculation, and the structural parameters are checked by finite element simulation analysis. The piston structure, self-locking device and buffer device of self-locking wind power hydraulic cylinder are designed, and the solid model of self-locking wind power cylinder is established by SolidWorks software, which lays a foundation for subsequent performance analysis and optimization. Secondly, the performance analysis of self-locking wind power hydraulic cylinder. The deformation and stress distribution of hydraulic cylinder under extreme axial load (extreme pushing load and extreme pull load) and radial load are studied, and the ultimate bearing capacity of hydraulic cylinder is obtained. The analysis and optimization of the structure parameters of the self-locking device are carried out again. The theoretical calculation formula of clamping force is obtained by using the force analysis of self-locking device under self-locking state. Further, the influence of structural parameters of self-locking device on clamping force is analyzed by MATLAB software and the parameters are optimized. Using ANSYS Workbench software to analyze the stiffness, strength and reliability of the key parts of the cylinder block, and using ANSY Workbench to simulate and analyze the clamping force of the self-locking device and its influencing factors, to verify the reliability of the locking device. Finally, the performance of hydraulic buffer device is studied. The theoretical research on the performance of the buffer device includes the establishment of the theoretical analysis model, the analysis of the buffering characteristic curve and the theoretical analysis of the influence on the buffer process, which provides the precondition for the simulation analysis. Through the simulation of the performance of the buffer device by fluent software, the pressure change during the buffer process and the influence of the structure parameters on the buffer performance are observed, which provides guidance for the design and selection of the buffer device.
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH137.51;TM315

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