CN101230838B - 中心齿轮同步变桨距装置 - Google Patents

中心齿轮同步变桨距装置 Download PDF

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CN101230838B
CN101230838B CN2007101568905A CN200710156890A CN101230838B CN 101230838 B CN101230838 B CN 101230838B CN 2007101568905 A CN2007101568905 A CN 2007101568905A CN 200710156890 A CN200710156890 A CN 200710156890A CN 101230838 B CN101230838 B CN 101230838B
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黄金伦
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NANTONG OEM REFRIGERATION EQUIPMENT CO., LTD.
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Abstract

一种中心齿轮同步变桨距装置，由伺服电动机的主动齿轮即为中心齿轮、驱动周围互间120°的三个齿轮，带动与齿轮同轴的三个宽槽轮，在每个宽槽轮上缠绕至少一圈的拉索、经两个导轮、在每一桨叶柄左右各绕半个圆周以后、在紧定器处、拉索的两个索头以常用技术恒张力紧定器会聚、紧定在桨叶柄上。三桨叶都用同样原理以各条拉索带动各桨叶柄，使各桨叶同步受控于伺服电动机，达到同步变桨距。优点是只用一套制造成本较低的同步变桨距取代现有三叶风力机的各套制造成本相当高的三套独立变桨距。

Description

中心齿轮同步变桨距装置
技术领域
本发明属于风力机变桨距装置，用单套伺服变桨距机构实现多桨叶同步变桨距。
背景技术
现有三叶风力机的变桨距似乎都采用每一桨叶配备各自独立的一套伺服变桨机构，结构虽然先进也很紧凑，但在制造成本、技术难度、故障发生机率和检修等问题，有待改进；不过，电子控制系统，如光电编码器、非接触式位移传感器等必须具备一套。
发明内容
本发明目的：力求降低制造成本、技术难度、故障机率，并尽量方便检修。
本发明的技术方案是：包括中心齿轮、伺服电动机和三个齿轮，该中心齿轮是伺服电动机的主动齿轮，所述的中心齿轮在三个齿轮的共同节圆的中心，其特征是，在每一该齿轮上各装有一个同轴的宽槽轮，在每一该宽槽轮上缠绕一圈以上的拉索，该拉索的两端各通过一对倾斜轴的导轮与一桨叶柄的下端连接；该伺服电动机通过中心齿轮驱动周围的三个齿轮，通过与齿轮同轴的宽槽轮带动该拉索、经导轮、绕桨叶柄半个圆周后，通过在桨叶柄后背的紧定器，再回路经绕桨叶柄的另一个半圆周，经另一个导轮返回至宽槽轮，构成闭合回路。
本发明的优点：①导轮、宽槽轮制造极简单，三个齿轮2实际上仅是一种零件，是外啮合齿轮，制造方便，中心齿轮1的周围互隔120°三点均衡受力，很稳定，也是外啮合齿轮，制造成本低；②拉索在宽槽上缠绕
Figure GA20174263200710156890501D00011
圈，不会打滑；③在图2中的左右两个倾斜轴导轮，在图1视图中(一个已剖去)的向外伸出程度比未剖去一个导轮略为伸出一个拉索的直径值，所以能免除拉绳叠合背起，拉索的松紧度由现有技术衡张力紧定器a1维护。
附图说明
图1：是中心齿轮同步变桨距侧剖图。
图2：是图1的左视图。
具体实施方式
①图1的上边部位，只画出了桨叶柄(轴)A的下端部分；在A的轴毂套B的根基部位的前方(图1的左向)开有左右各一个圆孔b，b至b的孔距等于桨叶柄A在该段的直径，图中还有一孔b在剖去的图形中(所以不见)。
②中心齿轮1即为伺服电动机m的主动齿轮，它在三个齿轮2的共同节圆的中心——即三个齿轮2(参考图2，即图1的左视图)的圆心所处的节圆的圆心上。
③拉索a的索头，在叶柄A的后方(图1的右向)在紧定器a1处用压块、螺钉紧固后，拉索a沿虚线(在A的不可见一侧)直到圆孔b、穿过b、绕过导轮c(轮轴是倾斜的)，向下方的宽槽轮d，缠绕
Figure GA20174263200710156890501D00021
圈后，再向上到另一个导轮c(在图2的右侧的c轮)，穿入右侧的圆孔b，直到紧定器a1处也用压块、螺钉紧固。
轮毂套B的右侧(图1)有一大窗口b1，可检查拉索a在a1的两个索头间自动显示预紧张拉程度，目的使三桨叶的拉索都保持同等预紧张拉程度；必要时可用人工调整。
拉索在飞机的操纵机构或轮船舵机中常用，拉索例如像用在玻璃幕墙上一样，安装前必须按规范在拉力机上测力预拉伸后，消除在许用载荷下的松驰度。常见的是不锈钢索，不过，如今复合纤维索应用日趋更好的前景，耐腐蚀、密度小等等优点。
变桨距传动：从上面②知：伺服电动机m、主动齿轮即中心齿轮1驱动它周围三个齿轮2，通过与齿轮2同轴的宽槽轮d带动拉索a(在上面③中)、经导轮c、绕桨叶柄A(半个圆周)、通过在A的后背的紧定器a1，再回路经绕A的另一个半圆周、经另一个导轮c直至宽槽轮d缠绕
Figure GA20174263200710156890501D00031
一圈(使拉索不会失效滑移)，构成闭合回路。这样三桨叶都被中心齿轮1同步控制；这种变桨原理其实如飞机方向舵、轮船方向舵一样。
图中大字母都表示现有三叶风力机的零部件。
图1，C是拨盘，它的上面有三根拨柱C1是装固于轴毂B上的(参见图上的主轴D的上侧所示)，另外三根拨柱C1是装固在拨盘上的(在主轴D的下侧所示)，这些结构都全部没有变动。
拨盘C唯一变动之处：在原来拨盘的左侧隔开一距离(使齿轮2的厚度可放入)、增加一块隔板4，外径与拨盘相同，不过外径方向开有三个缺口，目的使得便于按照原来拨盘上装固的三根拨柱C1安装。原来装固在轴毂B上的三根拨柱，它的大端都在齿轮2的空腹板外，所以仍可照旧把拨盘配套进孔。
图2中，有虚线阴影线处表示隔板4与拨盘C铸成联体的，其余部位是两者之间是放入齿轮的空腔。隔板4、拨盘C相对应三处装有轴承，使齿轮2与宽槽d的同轴安装。

Claims (3)

1.一种中心齿轮同步变桨距装置，包括中心齿轮、伺服电动机和三个齿轮，该中心齿轮是伺服电动机的主动齿轮，其特征是，所述的中心齿轮在三个齿轮的共同节圆的中心；在每一该齿轮上各装有一个同轴的宽槽轮，在每一该宽槽轮上缠绕一圈以上的拉索，该拉索的两端各通过一对倾斜轴的导轮与一桨叶柄的下端锁定；该伺服电动机通过中心齿轮驱动周围的三个齿轮，通过与齿轮同轴的宽槽轮带动该拉索、经导轮、绕桨叶柄半个圆周后，通过在桨叶柄后背的紧定器，再回路经绕桨叶柄的另一个半圆周，经另一个导轮返回至宽槽轮，构成闭合回路。
2.根据权利要求1所述的中心齿轮同步变桨距装置，其特征是，所述的拉索可为金属钢丝索、复合合成纤维索或复合纤维与金属丝共组索。
3.根据权利要求1或2所述的中心齿轮同步变桨距装置，其特征是，一对所述的倾斜轴的导轮的悬臂支座伸出程度相差一个拉索的直径值，以避免拉索在宽槽轮上缠绕
Figure FA20174263200710156890501C00011
圈时出现背叠。
CN2007101568905A 2007-11-19 2007-11-19 中心齿轮同步变桨距装置 Expired - Fee Related CN101230838B (zh)

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