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<h1>起重机滑轮组</h1> <img src="/uploads/cp/201808281847281581137732334.jpg" alt="起重机滑轮组"/> </div> <div class="xunpanya"><a onclick="lightshow('');"></a></div> <div class="newsview"> <p><p class="p0"> <img style="max-width:100%;" src="http://cmsimgshow.zhuchao.cc/11377/202007310920478631137793582.jpg" alt="" /> </p> <p class="MsoNormal"> <a href="http://www.bobbyorrcollector.com/hl/" target="_blank">滑轮l?/a>是多个动滑轮Q定滑轮l成的一Ƅ单的机械讑֤Q滑轮组使用可以节省人力Q也可以实现改变方向Q滑轮组的省力是q子的股数来决定的Q重物以及动滑轮的总重量是N股子来承担的,提v重物所需要的力气是总重?/n。机械的效率是被拉物体的重力Q动滑轮重力以及摩擦所军_的,滑轮是一个周Ҏ槽,是可以绕轴{动的轮子,是可以绕着中心轴有沟槽的圆盘以及跨国圆盘可以组成的l着中心旋{的简单机梎ͼ被叫做滑轮组?  </p> <p class="MsoNormal"> <br /> </p> <p class="MsoNormal"> <img style="max-width:100%;" src="http://cmsimgshow.zhuchao.cc/11377/202007310921486911137711413.jpg" alt="" />滑轮是一个周Ҏ槽,能够lu转动的小轮。由可绕中心轴{动有沟槽的圆盘和跨过圆盘的柔索(l뀁胶带、钢索、链条等Q所l成的可以绕着中心轴旋转的单机械[1]叫做滑轮?nbsp;  </p> <p class="MsoNormal"> 滑轮是杠杆的变ŞQ属于杠杆类单机械?  </p> <p class="MsoNormal"> <br /> </p> <p class="MsoNormal"> <img style="max-width:100%;" src="http://cmsimgshow.zhuchao.cc/11377/202007310923090661137795529.jpg" alt="" />用滑轮组做实验,很容易看出,使用滑轮l虽然省了力Q但是费了距Z—动力移动的距离大于货物升高的距R?nbsp;  </p> <p class="MsoNormal"> 定滑轮可以改变力的方向,但不能省力地拉动物体。动滑轮不可以改变力的方向,但能省一半的力地拉动物体。滑轮组l合了定滑轮和动滑轮Q这h可以改变力的方向Q又能很省力地拉动物体。若不计滑轮l用中所做的额外功,动滑轮用的越多越省力?  </p> <p class="MsoNormal"> <br /> </p> <p class="MsoNormal"> <img style="max-width:100%;" src="http://cmsimgshow.zhuchao.cc/11377/202007310923348631137796054.jpg" alt="" />滑轮有两U:定滑轮和动滑轮,l合成ؓ滑轮l,它既可以省力又可以改变力的方向?nbsp;  </p> <p class="MsoNormal"> <strong>定滑? </strong> </p> <p class="MsoNormal"> 定义Q固定在一个位|{动而不Ud的的滑轮叫定滑轮?  </p> <p class="MsoNormal"> 定滑轮的作用是改变力的方?  </p> <p class="MsoNormal"> 定滑轮的实质是个{臂杠杆Q动力臂L1、阻力臂L2都等于滑轮半径。根据杠杆^衡条件也可以得出定滑轮不省力和不省距ȝl论?  </p> <p class="MsoNormal"> <strong>动滑?</strong>  </p> <p class="MsoNormal"> 动滑轮实质是动力臂ؓd臂二倍的杠杆Q省1/2力多?倍距?   </p> <p class="MsoNormal"> <strong>滑轮l? </strong> </p> <p class="MsoNormal"> 滑轮l:由定滑轮跟动滑轮l成的滑轮组Q既省力又可改变力的方向.   </p> <p class="MsoNormal"> 滑轮l用几段l_吊着物体Q提L体所用的力就是总重的几分之一.l_的自ql过动滑轮的一D,而绕q定滑轮的就不算?   </p> <p class="MsoNormal"> 使用滑轮l虽然省了力Q但费了距离Q动力移动的距离大于重物Ud的距?   </p> <p class="MsoNormal"> <br /> </p> <p class="MsoNormal"> <img style="max-width:100%;" src="http://cmsimgshow.zhuchao.cc/11377/202007310924083631137728376.jpg" alt="" /> </p> <p class="MsoNormal"> Z可以节省力,改变动力的方向,可以定滑轮以及动滑轮组合成滑轮l,省力的大既省力又省距离的滑轮?  </p> <p class="MsoNormal"> 使用滑轮l的时候,使用几段l_着物体Q提L体所需要的力就是物重的几分之一?nbsp;  </p> <p class="p0"> <br /> </p></p> </div> <div class="tag">相关标签Q?a href='/key.aspx?k=%e5%9b%ba%e5%ae%9a%e6%bb%91%e8%bd%ae%e7%bb%84'>固定滑轮l?/a>,<a href='/key.aspx?k=%e6%bb%91%e8%bd%ae%e7%bb%84'>滑轮l?/a>,<a href='/key.aspx?k=%e8%b5%b7%e9%87%8d%e6%9c%ba%e5%8d%b7%e7%ad%92%e7%bb%84'>起重机卷{组</a>,</div> <div class="tag">来源Q?a href='http://www.bobbyorrcollector.com/supply/32.html'>http://www.bobbyorrcollector.com/supply/32.html</a></div> <div class="tag">旉Q?013/9/17 0:00:00</div> <div class="viewpage"> <div class="main_r_nav"> <div>上一?<a 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