某某学院毕业设计
某某学院毕业设计(论文）
家用新型变桨矩风力发电机设计
某某
班 级 某某 专 业 某某 所 在 系 指导老师 某某
完成时间2012年12月10日至2013年6月16日
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某某学院毕业设计
目 录
摘 要 ............................................................................................................................. 4 引 言................................................................................................................................................6 1.风机总体设计方案 .................................................................................................. 12
1.1叶片的气动力分析......................................................................................... 12 1.2翼型的几何参数与气动特性......................................................................... 14
1.2.1翼型的空气动力特性........................................................................... 15 1.2.1.1作用在翼叶上的气动力.................................................................... 15 1.2.1.2翼型的升力和阻力系数变化曲线.................................................... 16 1.2.2与翼型参数有关的风轮空气动力学几何定义................................... 17 1.3垂直轴风力机的工作原理............................................................................. 17
1.3.1阻力型风力机的工作原理.............................................................. - 17 - 1.3.2升力型风力机的工作原理.............................................................. - 18 - 1.4垂直轴风力机变浆矩运行方式的分析......................................................... 18
1.4.1叶片的攻角变化分析...................................................................... - 18 - 1.4.2变桨矩运行方式................................................................................... 20 1.4.3变桨矩方式结果分析........................................................................... 22 1.5风轮的基本功能设计..................................................................................... 22 2.风轮参数设计及计算 .............................................................................................. 24
2.1风轮设计特点................................................................................................. 24 2.2风轮的参数确定............................................................................................. 24
2.2.1尖速比................................................................................................... 24 2.2.2风能利用系数....................................................................................... 25 2.2.3风机电机的确定................................................................................... 25 2.2.4风机额定风速的确定........................................................................... 25 2.2.5启动风速的确定................................................................................... 25
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某某学院毕业设计
2.2.6风轮半径R及风轮高度 ...................................................................... 25 2.2.7叶片数以及叶片弦长的确定............................................................... 26 2.2.8风轮实度?的选取............................................................................... 26
3.风轮的结构设计 ...................................................................................................... 27
3.1变浆矩机构设计............................................................................................. 27 3.2叶片的结构设计............................................................................................. 28 3.3离心锤的设计................................................................................................. 29 3.4支撑杆结构设计............................................................................................. 30
3.4.1支撑杆材料确定................................................................................... 30 3.4.2支撑杆的截面形状的确定................................................................... 30 3.5轮毂的结构设计............................................................................................. 31 4.风机布局确定 .......................................................................................................... 32
4.1风机布局确定................................................................................................. 32
4.1.1轮毂的确定........................................................................................... 32 4.1.2套筒的确定........................................................................................... 32 4.1.3塔架的确定........................................................................................... 32 4.1.4塔架高度的确定................................................................................... 32 4.2力学性能......................................................................................................... 33
4.2.1螺栓的校核........................................................................................... 33 4.2.2通轴的校核........................................................................................... 33 4.3风机基本参数................................................................................................. 34 5.建模与虚拟仿真 ...................................................................................................... 36 结 论 ......................................................................................................................... 39 致 谢 ......................................................................................................................... 40 参考文献 ................................................................................................................ - 41 -
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某某学院毕业设计
摘 要
风能凭借其无污染，可循环利用等优点受到世界各国的重视。现代风力发
电机技术面临的挑战主要在于如何进一步提高效率、增加强度、降低成本这三方面。传统的垂直轴风力机由于启动性能较差、风能利用率较低没有得到大规模的应用。
本文针对现有的小型风力发电机结构存在的启动性能较差、风能利用率较低不足，设计一种的新型风力发电机结构。主要研究如下：初步设计一种小型变浆矩垂直轴风力机，能够提高转矩和风能利用率。根据性能要求进行了风轮的主要参数计算，设计出风轮的结构，进一步对风机整体进行结构设计并讨论变浆矩结构对风机性能的影响、发电机落地安装的可行性，并建立参数化三维模型，完成虚拟装配，建立风机的虚拟样机。
关键词:小型风力发电机；垂直轴；变浆矩；风轮的结构
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某某学院毕业设计
ABSTRACT
Modern wind turbine technology challenges is how to further improve efficiency,r- educe cost, increase the strength of these three aspects. Wind power by virtue of its no pollution, recycling and other merits attention all over the world. Horizontal axis wind turbine and vertical axis wind turbine are the two basic forms ofwindturbine.The trad- itional vertical axis wind turbine due to the initiation of poor performance, wind ener- gy utilization ratio is low have not been large-scale application.
This article in view of the existing small wind generator structure problems, to des- ign a small wind generator structure. The main studies areasfollows:the preliminary design of a small variable pitch wind turbine with vertical axis, can improve the torq- ue and energy utilization rate. According to the performance requirements of the wind wheel main parameters calculation, design the structure of the wind wheels, further to the blower fan integral structure design and discussion of pitch structure effect of fan performance,the generator is installed on the floor of the feasibility, and the establish- ment of parametric3D model, complete the virtual assembly, virtual prototype build fan.
Keywords: Small wind generator; Vertical axis; pitch; Zhe wind wheel structure
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