CN105526044A - 风力发电机分段组装叶片的连接结构及其制作方法 - Google Patents
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Abstract
本发明公开一种风力发电机分段组装叶片的连接结构,该叶片至少分为两段,在工厂分段制造,运往风场后再组装连接为整体,其特征在于,相邻两段叶片的连接采用中间连接件过渡,相邻两段叶片搭接在中间连接件上,相邻两段叶片的相对面对接,搭接面和对接面都用粘接剂粘接,所述中间连接件采用玻璃钢材料。
Description
技术领域
本发明涉及风力发电机叶片,尤其涉及一种风力发电机分段组装叶片的连接结构及其制作方法,属于风力发电技术领域。
背景技术
随着风电行业的迅速发展,单机功率越来越大,叶片长度在不断加长,已经远远超过运输部门允许的货物长度,不得不采用分段制造技术,将分段叶片运到风场后,再组装为一体。
分段组装叶片的技术难点是段间的连接结构,目前,国内外的分段叶片基本上都是采用螺栓连接,有两种方式,一是将螺栓预埋在叶片中,组装时只需把紧螺帽,优点是组装操作简便,缺点是金属螺栓与玻璃钢叶片的热膨胀系数差异太大,而叶片是露天工作环境,季节温差、昼夜温差大,热胀冷缩效应显著,螺栓所在部位的玻璃钢热应力很大,容易破损,且预埋螺栓工艺比较复杂,制造成本较高。二是在两段叶片的结合部钻螺栓孔,用穿心螺栓连接,优点是制作工艺简单,缺点是螺栓与叶片之间不可避免地存在配合间隙,结构强度较差,螺栓容易疲劳,需要随时更换,增大了机组的维护工作量。
发明内容
针对以上问题,本发明提供一种风力发电机分段组装叶片的连接结构及其制作方法,可避免出现上述问题,其技术解决方案是:
一种风力发电机分段组装叶片的连接结构,该叶片至少分为两段,在工厂分段制造,运往风场后再组装连接为整体,相邻两段叶片的连接采用中间连接件过渡,相邻两段叶片搭接在中间连接件上,相邻两段叶片的相对面对接,搭接面和对接面都用粘接剂粘接,所述中间连接件采用玻璃钢材料。
所述中间连接件包括壳体外壁连接板、壳体内壁连接板、抗剪切腹板连接板、主梁帽连接板、后缘增强连接板;相邻两段叶片壳体的内、外壁分别搭接在内、外壁壳体连接板上,相邻两段叶片抗剪切腹板搭接在抗剪切腹板连接板上,相邻两段叶片主梁帽搭接在主梁帽连接板上,相邻两段叶片后缘增强搭接在后缘增强连接板上。
所述壳体的外壁有与壳体外壁连接板适配的沉槽,所述壳体外壁连接板嵌入该沉槽内,其外壁与壳体的外壁齐平;所述壳体的外壁对应主梁帽的部位有与主梁帽连接板适配的沉槽,所述主梁帽连接板嵌入该沉槽内,其外壁与壳体的外壁齐平。
所述相邻两段叶片壳体的对接面、抗剪切腹板的对接面、主梁帽的对接面、后缘增强的对接面都用粘接剂粘接。
上述分段组装叶片连接结构的制作方法,包括步骤:
(1)、分别制作各段叶片,以及壳体外壁连接板、壳体内壁连接板、抗剪切腹板连接板、主梁帽连接板、后缘增强连接板;在制作叶片时,在壳体外壁预制出壳体外壁连接板、主梁帽连接板的装配沉槽;
(2)、将上述部件运至风场进行组装,先在壳体内壁连接板、抗剪切腹板连接板、后缘增强连接板的粘接面上涂覆粘接剂,粘在一段叶片的相应部位,粘接宽度为连接板的一半;再在壳体、抗剪切腹板、主梁帽、后缘增强的对接面涂覆粘接剂,然后将另一段叶片移拢对接;
(3)、在壳体外壁连接板沉槽、主梁帽连接板沉槽中涂覆粘接剂,将壳体外壁连接板、主梁帽连接板嵌入;
(4)、对叶片周向和纵向施压,刮掉叶片外壁从接缝溢出的多余粘接剂,保温、保压,直至粘接剂彻底固化。
本发明的有益效果:
由于本叶片完全采用玻璃钢材料及工艺,有效地解决了分段组装叶片的段间连接问题,连接可靠,性能稳定,工厂制造和现场组装都很简便,且成本低廉。
附图说明
图1是常规叶片的基本构造示意图
图2是图1的截面结构图
图3是本发明叶片结构示意图;
图4是图3的B-B视图;
图5是图4的C-C视图;
图6是图4的D-D视图;
图7为图5的E-E视图。
图中标号表示:1-迎流面壳体,2-背流面壳体,3-抗剪切腹板,4-主梁帽,5-后缘增强,6-粘接剂,7-壳体外壁连接板,8-壳体内壁连接板,9-抗剪切腹板连接板,10-主梁帽连接板,11-后缘增强连接板。
具体实施方式
为了便于理解本发明,首先介绍风力发电机叶片的基本结构。
参见图1、图2,风力发电机叶片主要由迎流面壳体1、背流面壳体2对接构成,其横截面轮廓为蝌蚪状,是空腹结构,腹腔中有两块纵向并列布置的抗剪切腹板3,壳体1、2的内壁对应腹板3的部位有主梁帽4,制作时该主梁帽4与壳体1、2一体成型,两主梁帽4分别与两抗剪切腹板3的两端粘接,构成叶片的大梁,背流面壳体2的内壁有后缘增强5,制作时与壳体2一体成型。壳体1、2为夹心玻璃钢,而主梁帽4、后缘增强5为素玻璃钢。
对于制造商来说,分段制造上述叶片是非常容易的,问题在于,如何实现叶片的段间连接,需要特殊的结构设计和工艺。
本发明采用的技术手段是,相邻两段叶片的连接采用中间连接件过渡,相邻两段叶片搭接在中间连接件上,相邻两段叶片的相对面对接,搭接面和对接面都用粘接剂6粘接,所述中间连接件采用玻璃钢材料。
参见图3至图7,所述中间连接件包括壳体外壁连接板7、壳体内壁连接板8、抗剪切腹板连接板9、主梁帽连接板10、后缘增强连接板11;相邻两段叶片壳体的内、外壁分别搭接在内、外壁壳体连接板上,相邻两段叶片抗剪切腹板搭接在抗剪切腹板连接板上,相邻两段叶片主梁帽搭接在主梁帽连接板上,相邻两段叶片后缘增强搭接在后缘增强连接板上。
所述壳体的外壁有与壳体外壁连接板适配的沉槽,所述壳体外壁连接板嵌入该沉槽内,其外壁与壳体的外壁齐平;所述壳体的外壁对应主梁帽的部位有与主梁帽连接板适配的沉槽,所述主梁帽连接板嵌入该沉槽内,其外壁与壳体的外壁齐平。
所述相邻两段叶片壳体的对接面、抗剪切腹板的对接面、主梁帽的对接面、后缘增强的对接面都用粘接剂粘接。
上述分段组装叶片连接结构的制作方法,包括步骤:
(1)、分别制作各段叶片,以及壳体外壁连接板、壳体内壁连接板、抗剪切腹板连接板、主梁帽连接板、后缘增强连接板;在制作叶片时,在壳体外壁预制出壳体外壁连接板、主梁帽连接板的装配沉槽;
(2)、将上述部件运至风场进行组装,先在壳体内壁连接板、抗剪切腹板连接板、后缘增强连接板的粘接面上涂覆粘接剂,粘在一段叶片的相应部位,粘接宽度为连接板的一半;再在壳体、抗剪切腹板、主梁帽、后缘增强的对接面涂覆粘接剂,然后将另一段叶片移拢对接;
(3)、在壳体外壁连接板沉槽、主梁帽连接板沉槽中涂覆粘接剂,将壳体外壁连接板、主梁帽连接板嵌入;
(4)、对叶片周向和纵向施压,刮掉叶片外壁从接缝溢出的多余粘接剂,保温、保压,直至粘接剂彻底固化。
Claims (5)
1.一种风力发电机分段组装叶片的连接结构,该叶片至少分为两段,在工厂分段制造,运往风场后再组装连接为整体,其特征在于:相邻两段叶片的连接采用中间连接件过渡,相邻两段叶片搭接在中间连接件上,相邻两段叶片的相对面对接,搭接面和对接面都用粘接剂粘接,所述中间连接件采用玻璃钢材料。
2.如权利要求1所述的风力发电机分段组装叶片的连接结构,其特征在于:所述中间连接件包括壳体外壁连接板、壳体内壁连接板、抗剪切腹板连接板、主梁帽连接板、后缘增强连接板;相邻两段叶片壳体的内、外壁分别搭接在内、外壁壳体连接板上,相邻两段叶片抗剪切腹板搭接在抗剪切腹板连接板上,相邻两段叶片主梁帽搭接在主梁帽连接板上,相邻两段叶片后缘增强搭接在后缘增强连接板上。
3.如权利要求2所述的风力发电机分段组装叶片的连接结构,其特征在于:所述壳体的外壁有与壳体外壁连接板适配的沉槽,所述壳体外壁连接板嵌入该沉槽内,其外壁与壳体的外壁齐平;所述壳体的外壁对应主梁帽的部位有与主梁帽连接板适配的沉槽,所述主梁帽连接板嵌入该沉槽内,其外壁与壳体的外壁齐平。
4.如权利要求2所述的风力发电机分段组装叶片的连接结构,其特征在于:所述相邻两段叶片壳体的对接面、抗剪切腹板的对接面、主梁帽的对接面、后缘增强的对接面都用粘接剂粘接。
5.权利要1-4所述分段组装叶片连接结构的制作方法,包括步骤:
(1)、分别制作各段叶片,以及壳体外壁连接板、壳体内壁连接板、抗剪切腹板连接板、主梁帽连接板、后缘增强连接板;在制作叶片时,在壳体外壁预制出壳体外壁连接板、主梁帽连接板的装配沉槽;
(2)、将上述部件运至风场进行组装,先在壳体内壁连接板、抗剪切腹板连接板、后缘增强连接板的粘接面上涂覆粘接剂,粘在一段叶片的相应部位,粘接宽度为连接板的一半;再在壳体、抗剪切腹板、主梁帽、后缘增强的对接面涂覆粘接剂,然后将另一段叶片移拢对接;
(3)、在壳体外壁连接板沉槽、主梁帽连接板沉槽中涂覆粘接剂,将壳体外壁连接板、主梁帽连接板嵌入;
(4)、对叶片周向和纵向施压,刮掉叶片外壁从接缝溢出的多余粘接剂,保温、保压,直至粘接剂彻底固化。
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CN108087191A (zh) * | 2017-12-25 | 2018-05-29 | 江苏金风科技有限公司 | 分段叶片、连接分段叶片的方法和风力发电机组 |
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CN111622905A (zh) * | 2020-06-10 | 2020-09-04 | 三一重能有限公司 | 分段式叶片和叶片连接方法 |
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