机械设计不可不知的传动——链传动(三)
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<h1 style="color: black; text-align: left; margin-bottom: 10px;"><strong style="color: blue;">倍速链的结构:</strong></h1>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">滚轮——工装板<span style="color: black;">安置</span>于滚轮面上;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">滚子——<span style="color: black;">安置</span>于倍速链型材轨道上,<span style="color: black;">同期</span>链条的驱动是<span style="color: black;">经过</span>主动链轮的轮齿直接与滚子啮合来进行的;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">内外链板、销轴——它们是链条的连接件,使单个的滚子滚轮串联成链条。销轴固定可用开口销或弹性锁片(<span style="color: black;">亦</span>叫卡扣,大节距不适用);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">套筒——其<span style="color: black;">做为</span>减小销轴与滚轮之间的摩擦,<span style="color: black;">守护</span>销轴,<span style="color: black;">亦</span><span style="color: black;">能够</span><span style="color: black;">无</span>。</p>
<h1 style="color: black; text-align: left; margin-bottom: 10px;"><strong style="color: blue;">倍速链的增速原理:</strong></h1>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">倍速链之<span style="color: black;">因此</span>被<span style="color: black;">叫作</span>为倍速链、差速链、差动链,<span style="color: black;">便是</span><span style="color: black;">由于</span>它<span style="color: black;">拥有</span>特殊的增速效果,<span style="color: black;">亦</span><span style="color: black;">便是</span><span style="color: black;">安置</span>在链条上方的工装板(<span style="color: black;">包含</span>工装板上<span style="color: black;">安置</span>的被<span style="color: black;">传送</span>工件)的移动速度大于链条本身的前进速度。这一效果是<span style="color: black;">因为</span>倍速链的特殊结构产生的,下面对产生<span style="color: black;">以上</span>增速效果的<span style="color: black;">原由</span>进行简单的分析。</p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如图示模型中,</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1、滚子在导轨上滚动,<span style="color: black;">况且</span>滚子与导轨之间的运动为纯滚动;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2、滚子与滚轮之间<span style="color: black;">无</span>相对运动;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">3、工装板与滚轮之间<span style="color: black;">无</span>相对运动。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">设链条的前进速度为v0,工装板(工件)的前进速度为v,滚子直径为d,滚轮直径为D。<span style="color: black;">按照</span><span style="color: black;">以上</span>假设,<span style="color: black;">因为</span>滚子、滚轮之间<span style="color: black;">无</span>相对运动,在滚子、滚轮的瞬间<span style="color: black;">能够</span>将它们看成是刚性连接在<span style="color: black;">一块</span>的,两者瞬时的滚动<span style="color: black;">能够</span>看作是以滚子与导轨接触点P点为转动中心的转动。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">假设滚子及滚轮<span style="color: black;">以上</span>瞬时转动的角速度为w(它们角速度相等)。<span style="color: black;">因此呢</span>滚子几何中心的切线速度<span style="color: black;">便是</span>链条的前进速度v0,而滚轮上方<span style="color: black;">选定</span>的切线速度<span style="color: black;">便是</span>工装板的前进速度,因而有</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">v0=w(d/2) ——公式一</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">V=w(d/2+D/2) ——公式二</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">按照</span>公式一和二,得v=(1+D/d)v0 ——公式三</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">对公式三分析<span style="color: black;">能够</span><span style="color: black;">发掘</span>,<span style="color: black;">因为</span>滚轮直径D<span style="color: black;">能够</span>成倍地大于滚子直径,<span style="color: black;">因此呢</span>工装板的前进速度v<span style="color: black;">能够</span>是链条前进速度v0的若干倍,这<span style="color: black;">便是</span>倍速链的增速效果原理。</p>
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<h1 style="color: black; text-align: left; margin-bottom: 10px;"> <strong style="color: blue;">倍速链<span style="color: black;">传送</span>线的工作原理:</strong></h1>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">运用倍速链条的增速功能,使其上承托货物的工装板快速运行,<span style="color: black;">经过</span>阻挡<span style="color: black;">公司</span>(阻挡气缸及其固定板),停止于相应的操作位置,或<span style="color: black;">经过</span>相应指令来完成积放动作及移行、转位、转线等功能。<span style="color: black;">因为</span>倍速链<span style="color: black;">传送</span>线的牵引链条上安装有<span style="color: black;">很强</span>的滚动论子,这些滚动的轮子除了跟牵引链<span style="color: black;">一块</span>运行外,它本身<span style="color: black;">亦</span>自转产生圆周速度,在轮子上面<span style="color: black;">安置</span>有工装板,工装板除了<span style="color: black;">拥有</span>牵引链的行进速度外,还<span style="color: black;">拥有</span>轮子转动给予的前进速度,二者叠加起来就形<span style="color: black;">成为了</span>比牵引链速度快的倍速。运送货物的工装板需反复<span style="color: black;">运用</span>,<span style="color: black;">通常</span>需搭配<span style="color: black;">各样</span>专机如顶升平移机、顶升转位机、升降机等配套<span style="color: black;">形成</span>水平或垂直循环系统。倍速链条分为3倍速、2.5倍速和单倍速三种,滚轮材质为工程塑料、尼龙、碳钢、不锈钢,链板为不锈钢、碳钢。</p>
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<h1 style="color: black; text-align: left; margin-bottom: 10px;"><strong style="color: blue;">倍速链选型计算:</strong></h1>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">1、</span><span style="color: black;">要求</span>确认</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">倍速链<span style="color: black;">运用</span>符合以下<span style="color: black;">要求</span>:</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">温度:-10℃~+80℃</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">链条速度:5~15m/min</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">机械长度:15m以下</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">环境:无磨损性粉尘、腐蚀性气体、高湿度等不良影响。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">2、</span>链条负载重量<容许负载重量</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">W=Gw/L<【W】</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">W——链条负载重量(<span style="color: black;">公斤</span>f/m),即传送物平均每米重量。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Gw——线上<span style="color: black;">同期</span>存在的传送物(<span style="color: black;">包含</span>工装板)总重量(<span style="color: black;">公斤</span>f)。注:1<span style="color: black;">公斤</span>∙f=9.8N</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">L——线体长度(m)</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">【W】——容许负载重量,如下面表“米思米2.5倍速链型号”表给出</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">2、</span><span style="color: black;">功效</span>于链条上的最大张力</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/28c7912c0d25475da44871f40329e78e~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339366&x-signature=gKNEc5MEfdkqfpWj%2B0Kj4WBQ24Y%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">T——<span style="color: black;">功效</span>于链条上的最大张力(kN);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">L1——传送部分的长度(m);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">L2——滞留部分的长度(m);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Hw——传送部分传送物(含工装板)每米质量(<span style="color: black;">公斤</span>/m);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Aw——滞留部分传送物(含工装板)每米质量(<span style="color: black;">公斤</span>/m);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Cw——链条每米自重(<span style="color: black;">公斤</span>/m);</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">fa——有滞留时传送物与链条间的摩擦系数,常取fa=0.1;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">fc——链条与滑轨的摩擦系数,常取fc=0.08;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">fr——有滞留时链条与滑轨的摩擦系数,常取fr=0.2;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">g——重力加速度,g=9.8m/s2</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">通常</span>倍速链<span style="color: black;">传送</span>机都是并列<span style="color: black;">运用</span>2条链条,故单根链条承受的最大张力为T/2。</p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">K1——速度系数;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">K2——传送物负载系数;</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">该型号倍速链满足<span style="color: black;">运用</span><span style="color: black;">需求</span>,否则换大一号链条。</p>
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楼主的文章非常有意义,提升了我的知识水平。 我完全同意你的看法,期待我们能深入探讨这个问题。 回顾过去一年,是艰难的一年;展望未来,是辉煌的一年。
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