摘   要

风力发电机导流罩是指风机轮毂的外保护罩，由于在风机迎风状态下，气流会依照导流罩的流线型均匀分流，故称导流罩。也称为轮毂罩、轮毂帽等。绝大部分风机的导流罩是玻璃钢材料制作，多采用真空导入模塑（VARTM）、LightRTM、手糊成型的方法成型制造。
轮毂罩的结构一般分为整体型导流罩、分体型导流罩两大类。常见的分体型导流罩是由3个1/3罩体部件和一个罩头部件用机械连接的方法拼合而成。分体型导流罩的优点是：模具简单，操作相对容易，拼装灵活。整体型导流罩必须在组合模具中一次整体成型出来，对模具的要求较高，对工艺的操作要求也较高，所以并不常见。
也有非玻璃钢材质的风力发电机导流罩，如铝合金导流罩等，欧洲的风机制造商选用的较多，其他国家和地区的风力发电机并不常见。
本设计首先介绍了夹具设计的基本原则，其中阐述了夹具在机械加工时的重要作用，重点介绍了了定位器和夹紧器的设计要求和设计方法，为后面作设计奠定了基础。
 
关键词  发电机导流罩；夹具；定位；夹紧

Abstract

Wind turbine fan shroud means hub outer protective cover, due to the wind turbine in the state, the air will follow a streamlined shroud split evenly, so that shroud. Also known as hubcaps, wheel caps. Most of the fan shroud is a fiberglass material, the use of vacuum infusion molding (VARTM), LightRTM, hand lay-up molding manufacturing methods.
Hubcaps monolithic structure is generally divided into the shroud, the shroud body divided into two categories. Common sub-body shroud is a 3 1/3 cover body parts and a head cover parts put together by the method of mechanical connection. Advantages of sub-body shroud is: simple mold, the operation is relatively easy, flexible assembly. Integral shroud must be a combination of the overall shape of the mold out of the mold of the higher requirements, the process of operating requirements are also higher, so it was not common.
There is also a non-fiberglass wind turbine shroud material, such as aluminum shroud, etc., wind turbine manufacturers in Europe are more choice, other countries and regions, wind turbines are not common.
This design introduces the basic principles of the design of the fixture, which describes the important role during machining fixtures, highlighting the locator and clamp design requirements and design methods for the design of the back of the foundation.
Keywords generator shroud; jig; positioning; clamping