CN106499592B - 海上风电机的塔筒结构 - Google Patents
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Abstract
本发明涉及一种海上风电机的塔筒结构,包括塔筒和水下基础,通过对塔筒结构进行改进,使得其轻质化得到提升,减小了海浪对塔筒冲击后对水下基础的剪切应力,从而保证了水下基础的耐久性。通过对塔筒筒壁的材质进行改进,使得在轻质化的情况下,强度得到保障。从而整体使得海上风电机组的维修频率得到控制。
Description
技术领域
本发明属于合金领域和风力发电领域,具体涉及一种海上风电机的塔筒结构。
背景技术
风力发电机,简称风电机或风电机组,目前,随着陆地资源的短缺和环境的恶化,海上风力发电机组越来越受到重视,海上风场和陆地风场具有很多的不同。陆地风场一般风速分布差异大,而海上风场由于没有大量障碍物的阻挡,因此风速分布均匀;陆地风场的风向受地形影响大,而海上风场风向稳定,但是不易集中,海上风场湍流较小,风切变较小。基于上述不同,海上的风电机与陆上的风电机在建造装备的性能要求即不同。
发明内容
本发明通过提出一种海上风电机的塔筒结构。
具体通过如下技术手段实现:
一种海上风电机的塔筒结构,包括塔筒和水下基础。
所述塔筒上端与风力发电机的塔头相连接,所述塔筒设置为上部为圆柱形,下端为圆台形。
所述塔筒为中空结构,包括筒壁、内杆和横梁,所述筒壁设置在最外侧,所述内杆在筒壁圆心处竖直设置,所述横梁为多个,用于连接所述筒壁和所述内杆。
所述筒壁为高强度镁合金材质,所述高强度镁合金按质量百分比计为:Bi:11~15%,Mn:0.5~1.2%,Ca:2.1~2.8%,La:0.1~0.3%,余量为Mg和不可避免的杂质。在所述高强度镁合金的微观结构中Mg3Bi2相的平均粒径为120~220nm,且所述Mg3Bi2相中80~88%呈球形弥散分布在基体中。
所述水下基础包括与所述塔筒的下端圆台相固接的支撑部和嵌入海床的锥形柱,所述锥形柱为多个,上端均与所述支撑部相固接,下端楔入海床,所述锥形柱为中空结构,在其顶端一侧均设置有填充物注入口。
所述锥形柱的材质为高强度不锈钢,所述填充物为水泥混凝土。
作为优选,所述圆台的高度占整个塔筒高度的1/5~1/4。
作为优选,所述筒壁的厚度为3~8cm。
作为优选,所述锥形柱为8~10个。
作为优选,所述锥形柱的上端为圆柱形,下端为锥形。
所述高强度镁合金在成型之后,进行如下热处理步骤:
1)将成型之后的高强度镁合金置入电阻炉内,随炉加热至490~520℃,保温30~100min后出炉空冷。
2)将步骤1)处理之后的半成品置入到深冷箱中降温至-110~-130℃,保持该温度20~50min后,出深冷箱恢复至室温。
3)将步骤2)处理之后的半成品置入到回火炉中,加热至120~150℃,不保温即随炉冷却至室温,得到高强度镁合金筒壁。
所述高强度不锈钢按质量百分比含量计为:C:0.02~0.03%,Si:0.26~0.55%,Mn:1.0~1.2%,P:≤0.02%,S:≤0.01%,Ni:3.1~5.5%,Ti:0.012~0.016%,Cr:5.2~8.1%,Nb:0.01~0.08%,Mo:0.51~0.86%,RE:0.01~0.02%,V:0.005~0.01,W:0.01~0.03,限制元素H≤0.0001%,N≤0.003%,O≤0.0015%,余量为Fe和不可避免的杂质。
所述高强度不锈钢微观结构中纵截面的表面至表面以下2mm处针状铁素体分布比例是在其纵截面中心直径为2mm区域的分布的3~5倍,表面至表面以下2mm处针状铁素体的平均粒径为5.0~5.5µm,截面中心直径为2mm区域的针状铁素体的平均粒径为3.9~5.1µm;所述高强度不锈钢的微观结构中岛状马氏体的体积百分比为8.5~11%。
作为优选,所述水泥混凝土的混凝土料的组分按质量份数比计为:硅藻土:20~25份,地开石:20~25份,蒙脱石:10~15份,蛭石:15~20份,芒硝:10~12份,氯化铁:1~3份,甲基纤维素:1~3份,碳酸钠:0.5~1.5份。
本发明的效果在于:
1,通过对塔筒筒壁材质进行改进,使得其轻质化的条件下,保证了强度。通过对其中组分的改进,通过Bi和稀土La的同时添加,使得整体的晶粒得到细化,从而保证了高强度,通过对其中微观结构中Mg3Bi2相粒径和形状进行限定,保证了晶粒中Mg3Bi2相的弥散(平均晶粒粒径处于纳米级),从而进一步保证了整体晶粒的细化。本发明高强度镁合金的抗拉强度为420~480MPa,屈服强度为390~400MPa,延伸率为8~12%。
2,通过对塔筒的结构进行改进,使得其整体保证了轻质化,从而降低了对水下基础的横向切应力,从而降低了水下基础的损坏率,但是通过设置内部的内杆和横梁,又能保证其强度,保证了塔头上叶片的转动对塔筒的强度要求。
3,通过设置水下基础中的中空锥形柱,使得在运输安装过程中,该水下基础比较轻质,通过运输船即可进行运输和安装,安装之后向其中灌入混凝土料,从而进行重量加固,达到水下基础的承重效果,方便了运输和安装。
附图说明
图1为本发明塔筒的结构剖示图。
图2为本发明海上风电机的塔筒结构的结构示意图。
其中:1-塔筒,11-下端的圆台,12-筒壁,13-内杆,14-横梁,15-下端横梁,21-支撑部,22-锥形柱,23-填充物注入口,3-海平面。
具体实施方式
实施例1
一种海上风电机的塔筒结构,包括塔筒和水下基础。
所述塔筒上端与风力发电机的塔头相连接,所述塔筒设置为上部为圆柱形,下端为圆台形。
所述塔筒为中空结构,包括筒壁、内杆和横梁,所述筒壁设置在最外侧,所述内杆在筒壁圆心处竖直设置,所述横梁为多个,用于连接所述筒壁和所述内杆。
所述筒壁为高强度镁合金材质,所述高强度镁合金按质量百分比计为:Bi:12%,Mn:0.8%,Ca:2.2%,La:0.15%,余量为Mg和不可避免的杂质。在所述高强度镁合金的微观结构中Mg3Bi2相的平均粒径为180nm,且所述Mg3Bi2相中86%呈球形弥散分布在基体中。
所述水下基础包括与所述塔筒的下端圆台相固接的支撑部和嵌入海床的锥形柱,所述锥形柱为多个,上端均与所述支撑部相固接,下端楔入海床,所述锥形柱为中空结构,在其顶端一侧均设置有填充物注入口。
所述锥形柱的材质为高强度不锈钢,所述填充物为水泥混凝土。
所述圆台的高度占整个塔筒高度的22%。
所述筒壁的厚度为6cm。
所述锥形柱为9个。
所述锥形柱的上端为圆柱形,下端为锥形。
所述高强度镁合金在成型之后,进行如下热处理步骤:
1)将成型之后的高强度镁合金置入电阻炉内,随炉加热至498℃,保温50min后出炉空冷。
2)将步骤1)处理之后的半成品置入到深冷箱中降温至-115℃,保持该温度31min后,出深冷箱恢复至室温。
3)将步骤2)处理之后的半成品置入到回火炉中,加热至130℃,不保温即随炉冷却至室温,得到高强度镁合金筒壁。
通过测量该实施例高强度镁合金的抗拉强度为461MPa,屈服强度为396MPa,延伸率为9.6%。
实施例2
一种海上风电机的塔筒结构,包括塔筒和水下基础。
所述塔筒上端与风力发电机的塔头相连接,所述塔筒设置为上部为圆柱形,下端为圆台形。
所述塔筒为中空结构,包括筒壁、内杆和横梁,所述筒壁设置在最外侧,所述内杆在筒壁圆心处竖直设置,所述横梁为多个,用于连接所述筒壁和所述内杆。
所述筒壁为高强度镁合金材质,所述高强度镁合金按质量百分比计为:Bi:13.9%,Mn:1.1%,Ca:2.6%,La:0.26%,余量为Mg和不可避免的杂质。在所述高强度镁合金的微观结构中Mg3Bi2相的平均粒径为210nm,且所述Mg3Bi2相中86.8%呈球形弥散分布在基体中。
所述水下基础包括与所述塔筒的下端圆台相固接的支撑部和嵌入海床的锥形柱,所述锥形柱为多个,上端均与所述支撑部相固接,下端楔入海床,所述锥形柱为中空结构,在其顶端一侧均设置有填充物注入口。
所述锥形柱的材质为高强度不锈钢,所述填充物为水泥混凝土。
所述圆台的高度占整个塔筒高度的23%。
所述筒壁的厚度为5cm。
所述锥形柱为10个。
所述锥形柱的上端为圆柱形,下端为锥形。
所述高强度镁合金在成型之后,进行如下热处理步骤:
1)将成型之后的高强度镁合金置入电阻炉内,随炉加热至506℃,保温92min后出炉空冷。
2)将步骤1)处理之后的半成品置入到深冷箱中降温至-126℃,保持该温度38min后,出深冷箱恢复至室温。
3)将步骤2)处理之后的半成品置入到回火炉中,加热至138℃,不保温即随炉冷却至室温,得到高强度镁合金筒壁。
本实施例镁合金的抗拉强度为469MPa,屈服强度为392MPa,延伸率为9%。
所述高强度不锈钢按质量百分比含量计为:C:0.028%,Si:0.51%,Mn:1.18%,P:0.012%,S:0.008%,Ni:5.2%,Ti:0.015%,Cr:8.0%,Nb:0.06%,Mo:0.80%,RE:0.018%,V:0.009%,W:0.019%,限制元素H:0.00008%,N:0.0003%,O:0.00015%,余量为Fe和不可避免的杂质。
所述高强度不锈钢微观结构中纵截面的表面至表面以下2mm处针状铁素体分布比例是在其纵截面中心直径为2mm区域的分布的3.9倍,表面至表面以下2mm处针状铁素体的平均粒径为5.3µm,截面中心直径为2mm区域的针状铁素体的平均粒径为5.0µm;所述高强度不锈钢的微观结构中岛状马氏体的体积百分比为9.8%。
所述高强度不锈钢的屈服强度为539MPa,抗拉强度为896MPa,断后伸长率为21%。
所述水泥混凝土的混凝土料的组分按质量份数比计为:硅藻土:23份,地开石:22份,蒙脱石:13份,蛭石:18份,芒硝:11.8份,氯化铁:2.5份,甲基纤维素:2份,碳酸钠:1.2份。
实施例3
一种海上风电机的塔筒结构,包括塔筒和水下基础。
所述塔筒上端与风力发电机的塔头相连接,所述塔筒设置为上部为圆柱形,下端为圆台形。
所述塔筒为中空结构,包括筒壁、内杆和横梁,所述筒壁设置在最外侧,所述内杆在筒壁圆心处竖直设置,所述横梁为多个,用于连接所述筒壁和所述内杆。
所述筒壁为高强度镁合金材质,所述高强度镁合金按质量百分比计为:Bi:13%,Mn:0.8%,Ca:2.5%,La:0.2%,余量为Mg和不可避免的杂质。在所述高强度镁合金的微观结构中Mg3Bi2相的平均粒径为160nm,且所述Mg3Bi2相中85%呈球形弥散分布在基体中。
所述水下基础包括与所述塔筒的下端圆台相固接的支撑部和嵌入海床的锥形柱,所述锥形柱为多个,上端均与所述支撑部相固接,下端楔入海床,所述锥形柱为中空结构,在其顶端一侧均设置有填充物注入口。
所述锥形柱的材质为高强度不锈钢,所述填充物为水泥混凝土。
所述圆台的高度占整个塔筒高度的1/5。
所述筒壁的厚度为6.9cm。
所述锥形柱为8个。
所述锥形柱的上端为圆柱形,下端为锥形。
所述高强度镁合金在成型之后,进行如下热处理步骤:
1)将成型之后的高强度镁合金置入电阻炉内,随炉加热至500℃,保温60min后出炉空冷。
2)将步骤1)处理之后的半成品置入到深冷箱中降温至-120℃,保持该温度30min后,出深冷箱恢复至室温。
3)将步骤2)处理之后的半成品置入到回火炉中,加热至135℃,不保温即随炉冷却至室温,得到高强度镁合金筒壁。
本实施例高强度镁合金筒壁的抗拉强度为460MPa,屈服强度为395MPa,延伸率为10%。
Claims (1)
1.一种海上风电机的塔筒结构的制备方法,所述海上风电机的塔筒结构包括塔筒和水下基础;
所述塔筒上端与海上风电机的塔头相连接,所述塔筒设置为上部为圆柱形,下端为圆台形;
所述塔筒为中空结构,包括筒壁、内杆和横梁,所述筒壁设置在最外侧,所述内杆在筒壁圆心处竖直设置,所述横梁为多个,用于连接所述筒壁和所述内杆;
其特征在于,所述圆台形的高度占整个塔筒高度的1/5~1/4;
所述筒壁的厚度为3~8cm;
所述筒壁为高强度镁合金材质,所述高强度镁合金按质量百分比计为:Bi:11~15%,Mn:0.5~1.2%,Ca:2.1~2.8%,La:0.1~0.3%,余量为Mg和不可避免的杂质;在所述高强度镁合金的微观结构中Mg3Bi2相的平均粒径为120~220nm,且所述Mg3Bi2相中80~88%呈球形弥散分布在基体中;
所述高强度镁合金在成型之后,进行如下热处理步骤:
1)将成型之后的高强度镁合金置入电阻炉内,随炉加热至490~520℃,保温30~100min后出炉空冷;
2)将步骤1)处理之后的半成品置入到深冷箱中降温至-110~-130℃,保持该温度20~50min后,出深冷箱恢复至室温;
3)将步骤2)处理之后的半成品置入到回火炉中,加热至120~150℃,不保温即随炉冷却至室温,得到高强度镁合金筒壁;
所述水下基础包括与所述塔筒的下端圆台相固接的支撑部和嵌入海床的锥形柱,所述锥形柱为8~10个,上端均与所述支撑部相固接,下端楔入海床,所述锥形柱为中空结构,在其顶端一侧均设置有填充物注入口;
所述锥形柱的上端为圆柱形,下端为锥形;
所述锥形柱的材质为高强度不锈钢,所述填充物为水泥混凝土。
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