经济型掩护式液压支架的设计
电源插头塑料模具设计
设计“CA6140法兰盘”零件的机械加工工艺规程及工艺设备(年产量为4000件)
骨架(SMBS-04)的注射模设计
螺旋千斤顶的设计
底座注塑模模具设计
链式输送机传动装置
法兰盘的机械加工工艺规程制定及选定工序专用家具的设计
JD-40型调度绞车改良设计
拨叉(12-07-05)加工工艺及夹具设计
后钢板弹簧吊耳加工工艺及夹具设计
300X400数控激光切割机设计
闭风器的设计
.
比较来看,定桨距失速控制风力机结构简单,造价低,并具有较高的安全系数,利于市场竞争,但失速型叶片本身结构复杂,成型工艺难度也较大.随着功率增大,叶片加长,所承受的气动推力增大,叶片的失速动态特性不易控制,使制造更大机组受到限制.变桨距型风力机能使叶片的节距角随风速而变化,从而使风力机在各种工况(起动、正常运转、停机)下按最佳参数运行,可使发电机在额定风速以下的工作区段有较大的功率输出,而在额定风速以上的高风速区段不超载,无需过大容量的发电机等.当然,它的缺点是需要有一套比较复杂的变距调节结构.现在这两种功率调节方案都在大、中型风力发电机组中得到了广泛应用.目前中国风电发展面临两个突出的问题:一是风电发展规模迅速扩大,形成巨大的市场空间;二是国产机组缺乏竞争力,进口机组以压倒的优势占领了中国风电装机的主要份额.因此,大型风电机组的国产化是推动我国风电持续发展的根本途径.
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