机械传动基本知识学习，链传动及其传动比，链传动的结构
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">1、</span>链传动及其传动比</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1．链传动的<span style="color: black;">构成</span>：主动链轮，链条，从动链轮</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/bd7b5c0533dd4cf8a5d8d3d71aa0e44e~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=9enQIV60afagegBGcu6ZLNYSUA4%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2．链传动的传动比</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/57616ed597f04d8eabf09b36371beec2~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=rNIl7L99Om6O0zj31nmve12Kedo%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">n1、n2 —— 主、从动轮的转速，r/min；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">z1、z2 —— 主、从动轮齿数 。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">2、</span>链传动的应用特点</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">传动比 i≤8，低速传动时 i <span style="color: black;">达到</span>10</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">两轴中心距a为5~6 m</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">传动功率P≤100 kW</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">链条速度 v≤15 m/s，高速时<span style="color: black;">达到</span>20～40m/s</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">3、</span>链传动<span style="color: black;">归类</span></p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/8a871d543118409bb1bf452b478999d2~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=Xj98CJY6ijFcQeaesmjdoNSoYDE%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">4、</span>滚子链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1．滚子链的结构</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/2e881ba3938040aea7e67000c6440bfc~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=wIuY710B8PQ2uvzkgt%2F7q4uAuvI%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1－内链板，2－外链板，3－销轴，4－套筒，5－滚子 </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2．滚子链的<span style="color: black;">重点</span>参数 </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（1）节距——链条的相邻两销轴中心线之间的距离，以符号P<span style="color: black;">暗示</span>。 </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"> 链的节距越大，承载能力越强，但链传动的结构尺寸<span style="color: black;">亦</span>会相应增大，传动的振动、冲击和噪声<span style="color: black;">亦</span>越严重。 </p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/b48aa1ed6eaf4834ae71bbf513ddca08~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=5GneL6lavYQ7hXsbFUwPJ6j%2Fkjg%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（2）节数——滚子链的长度用节数来<span style="color: black;">暗示</span>。链节数应<span style="color: black;">尽可能</span><span style="color: black;">选择</span>偶数。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/64bbcbd80192410ebc031e6ec01b4837~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=ZvF%2Bb64iiLFBb8yl7iCnKmj05Gg%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（3） 链条速度</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">链轮速度不宜过大，链条速度越大，链条与链轮间的冲击力<span style="color: black;">亦</span>越大，会使传动不<span style="color: black;">安稳</span>，<span style="color: black;">同期</span>加速链条和链轮的磨损。<span style="color: black;">通常</span><span style="color: black;">需求</span>链条速度不大于15m/s。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">（4） 链轮的齿数 </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">为<span style="color: black;">保准</span>传动<span style="color: black;">安稳</span>，减少冲击和动载荷，小链轮齿数z1不宜过小，<span style="color: black;">通常</span>z1应大于17。大链轮的齿数z2<span style="color: black;">亦</span>不宜<span style="color: black;">太多</span>，齿数<span style="color: black;">太多</span>除了增大传动尺寸和质量外，还会<span style="color: black;">显现</span>跳齿和脱链现象，<span style="color: black;">一般</span>z2应<span style="color: black;">少于</span>120。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因为</span>链节数常取偶数，为使链条与链轮轮齿磨损均匀，链轮齿数<span style="color: black;">通常</span>应取与链节数互为质数的奇数。 </p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">3．滚子链的标记 </p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/9cc5fe6c75a442b1ae57443c94807f28~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=SwFGrfqHxNJDTBKM02%2FLNhcBnUE%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">5、</span>齿形链</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">由一组带有齿的内、外链板<span style="color: black;">上下</span>交错<span style="color: black;">摆列</span>，用铰链连接而成。 </p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/772f13ce2d9340baa4fe1c6b0bf17814~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1723339204&x-signature=hEfYeQry31hYCyw6m0nnTXtDwHo%3D" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1．9.52mm及以上节距链条链号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">链号由字母SC与<span style="color: black;">暗示</span>链条节距和链条公<span style="color: black;">叫作</span>宽度的数字<span style="color: black;">构成</span>，数字的前一位或前两位乘以3.175mm（1/8in）为链条节距值，最后两位或三位数乘以6.35mm（1/4in）为齿形链的公<span style="color: black;">叫作</span>链宽。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">例如：SC302 <span style="color: black;">暗示</span>节距为 9.52 mm、公<span style="color: black;">叫作</span>链宽为12.70 mm的齿形链。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2．4.76mm节距链条链号</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">位数乘以1.5875mm（1/16in）为链条节距值，最后一位或两位数乘以0.79375（1/32in）为齿形链的公<span style="color: black;">叫作</span>链宽。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">例如：SC0309 <span style="color: black;">暗示</span>节距为 4.76 mm、公<span style="color: black;">叫作</span>链宽为7.14 mm的齿形链。</p>
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