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该铂金如何通过有效的运动控制降低风险和成本？

2021年8月12日，星期四

南非：BMG电子产品使用Danfoss驱动器来支持Drytech International开发独特的湿螺丝馈线，用于用于铂金，包括矿山，加工厂和冶炼厂的白金操作。该解决方案通过不受伺服运动控制的优雅同步，降低成本并减少维护时间，从而提高了可靠性。

了解BMG电子产品如何使用Danfoss驱动器来帮助Drytech International开发出独特的高效湿螺丝馈线。

阅读ipaper

挑战：异常材料需要独特的解决方案

Drytech International开发了该工厂的湿螺丝馈线，以应对铂金属金属（PGMS），镀铬和碱金属处理的材料的异常特征。该材料非常粘，具有像粘土一样的一致性，需要平滑地转移到干衣机中。此外，该材料不仅是从林波波省附近地区内的矿山收到的，而且还从南非姆普马兰加省的矿山中收到了超过300公里的矿山。在运输过程中，一些复合材料干燥，而另一些则保持湿。

从机械设计的角度来看，进纸器所需的齿轮将是大规模的，在物理拟合到单元同步的情况下，构成了一些实际的挑战，而无需螺钉碰撞。较大的齿轮也将大大增加湿螺丝喂食器的成本。易于维护是该工厂的进一步要求。第一个湿螺钉馈线所需的吞吐量在每小时30至40吨之间，第二个进料器需要每小时15吨。

解决方案：同步螺杆

3D湿喂食器模型不带警卫 带警卫的3D湿进料器模型 使用FC 302驱动器的Drytech湿螺钉馈线设置

Drytech建造了试用机以测试应用程序，试验表明，三螺杆轴是最有效的解决方案。尽管在试验期间，将三个螺杆机械地链接到另一个螺杆，但客户支持具有独立轴的溶液，并使用VLT®自动化驱动器FC 302单元进行电子同步，可在每个轴上控制22 kW电动机/变速箱。这是一个关键的要求，因为所有三个独立的轴都需要以协调的方式旋转以防止机械损坏。例如，如果其中一个电动机，变速箱或轴被超载并减慢电动机的速度，则必须通过异步功能和所有螺杆停止检测到它。一旦解决了问题并手动将应用程序带回去，该应用程序就会自动恢复到启动时正确的同步位置，而不必手动将轴返回到家庭位置。

斯蒂芬·布朗（Stephen Brown），中东和非洲丹福斯土耳其的采矿业务发展经理

“ DanfossVLT®自动化驱动器FC 302提供为该客户提供了理想的解决方案，这是因为其具有创新的替代方案，可替代传统的伺服控制方法，用于定位和同步操作。驱动器可通过简单的参数化适应应用程序。”解释说，丹福斯土耳其，中东和非洲的采矿业务发展经理Stephen Brown说

在正常运行期间，每个驱动器上的负载相对较轻 - 在不到50％的电动机全负载扭矩（FLT）下 - 但是由于材料的粘性一致性，有时会发生更高的负载。事实证明，这在开始条件或低饲料速率条件下尤其如此。具有22 kW电动机的22千瓦驱动器非常适合应对这些条件，通过不断将功率与负载相匹配。电动机安装在驾驶每个螺杆的变速箱上方，通过皮带驱动器驱动变速箱。

“我们需要灵活性，以便在调试过程中调整皮带轮比率，以设置馈线的最大速度，因此是吞吐量的速度。这也可以防止皮带上的机械损坏，这将首先失败。”

-Riaan van Niekerk，Drytech发言人

速度更高和操作控制

BMG Electronics的现场服务技术员Juan Lerm设置的最终申请包括连接到22 kW电动机的三个螺钉和降低变速箱。主电机（中心电动机）由带有Profibus®和编码器选项的VLT®自动化驱动器FC 302控制。Profibus®Master是根据过程要求控制该电机的操作和速度的工厂控制系统。主电机配备编码器以增加其动态扭矩响应，并且该电动机的轴具有参考编码器，可测量实际的螺杆轴旋转速度。

每革命的脉冲越高（PPR），同步越好，因为增量彼此接近，从而增加了反馈的分辨率。

“在此应用中，我们使用了8192 PPR Multiturn绝对编码器，” BMG机电部电子经理Mick Baugh解释说。“当湿馈器需要运行时，它通过PROFIBUS®为主变量速度驱动器（VSD）提供了'start'命令。主VSD然后将起始信号传达给追随者VSD。”

这两个追随者螺钉与VLT®同步控制器MCO 350选项连接到VLT®自动化驱动器FC 302，以及用于监视目的的Profibus®。主编码器都连接到MCO作为主参考，这意味着MCO 350卡监视主轴的速度。跟随器编码器安装在跟随器螺钉的螺杆上，这些编码器连接到每个相应的MCO作为反馈信号。

应用的电图
应用的电图

“此操作的方式是，自行车的方法有效地反映了主编码器：如果主螺钉轴以一定速度运行，则将其速度和匹配的追随者MCO卡监视，以使其与主轴与Master Refersion同步，”鲍尔说。

“如果申请处于警报状态，所有电动机将沿着停车，并且追随者的轴将失去同步。当给出启动命令时，主VSD具有五秒钟的延迟，因此螺钉会升高，并且应用程序本身会恢复同步。然后，根据PROFIBUS®信号，主会将速度参考提高到速度参考。”

如果在应用程序上进行了维护，则螺钉将不同步。对手动同步进行了编程，以便VSD可以进入第二个设置，现在可以将每个螺钉向前慢慢慢慢地慢跑，并反向以将所有螺钉放回同步位置。正确对齐螺钉后，技术人员只需按下同步按钮即可使驱动器一个新的零位置。当应用程序再次启动时，它将同步运行。

Baugh补充说：“ DanfossVLT®同步控制器MCO 350选项不需要编写特殊APOS程序的事实也是一个重要的决定因素。”

发现智能驱动器为您的运营增加价值的方式：
VLT®自动化驱动器FC 302		 了解有关通过Danfoss同步，定位和CAM控制提高生产率的更多信息 在采矿和矿产加工中发现更多的大量资本支出和OPEX节省的驱动器解决方案
访问FC 302网页 阅读运动控制手册 阅读采矿手册

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