高鹏真空罗茨真空�?参数-价格-中国粉体罐�/title>

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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;"><strong style="box-sizing: border-box; outline: 0px; margin: 0px; padding: 0px;"><span style="box-sizing: border-box; outline: 0px; margin: 0px; padding: 0px; font-size: 18px; color: rgb(0, 51, 153);">结构原理９�/span></strong></p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">ZJB型带溢流阀罗茨真空泵是ZJ型罗茨真空泵的派生产品。抽气原理同ZJ型泵一样，也是利用一�?型转子在泵壳中保持一定的间隙，作等速反向而产生吸气和排气作用的。所不同的ZJB型是型带溢流阀罗茨泵的进排气口连通，在通道上垂直地装置着一个自重阀。其作用是当进口和排气口的压力差与阀的有效作用面积的乘积超过阀头的自重时，阀头就自动顶开。这个数值是设计的泵可靠运转�?*压力差值。因此这种阀实际上就是一种过载自动保护阀。二个轮子被支撑在泵壳侧面端的滚动轴承中。依靠一对可调的同步齿轮使二个转子在高速旋转时始终保持着一定的相互位置，而转子与端盖之间的端面间隙是靠固定端轴承下面的可调金属垫片来保证，使之泵在工作时因受热而转子只能向一面膨胀、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">端盖内的四组内轴对是为了防睛两侧润滑油进入泵壳，出轴处油封是为了防止气体流入泵内、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">为减低泵温，�?小二种规格的泵外，均装有齿轮箱冷却器和出轴油封冷却器、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">电动机的动力通过联轴器传给主动轴，再通过同步齿轮传动从动轴、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">ZJB系列带溢流阀罗茨真空泵均制成卧式结构，采用联轴器与法兰电机直联、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;"><br style="box-sizing: border-box; outline: 0px;"/></p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;"><strong style="box-sizing: border-box; outline: 0px; margin: 0px; padding: 0px;"><span style="box-sizing: border-box; outline: 0px; margin: 0px; padding: 0px; font-size: 18px; color: rgb(0, 51, 153);">使用特点</span></strong>９�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">带溢流阀罗茨真空泵的**特点是具有过载自动保护，而抽气性能与ZJ型罗茨真空泵相同，即是在较低入口压力时具有较高的抽气速率，但因为罗茨真空泵是一种干燥的间隙密封结构，要获得一定的抽气速成率和极限真空，也必须降低前级压力，减少返流，因此使用时必须有一台前级真空泵串联，且待前级真空泵抽到一定压力后罗茨真空泵再开始工作，这样才是*经济的、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;"><br style="box-sizing: border-box; outline: 0px;"/></p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;">前级真空泵一般为油封机械泵，但如果极限真空要求不高时，可选用其他形式的粗真空泵作为前级泵，特别在抽除含有大量水蒸汽的气体时，选用液环真空泵作为前级泵是很理想的，当然所有达到的极限真空度要低些、�/p><p style="box-sizing: border-box; outline: 0px; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑; font-size: 14px; white-space: normal;"><br/></p><ul style="list-style-type: none;" class=" list-paddingleft-2"></ul> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div style="padding:10px;">暂无相关方案、�/div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); 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