REXROTH换向阀 德国力士乐换向阀

REXROTH换向阀

REXROTH换向阀 节能降噪新概念 只需在原有系统增加一个变频器，即刻享有高效节能新动力

在过去数十年间，塑机行业采用比例及高频响阀，并通过使用电子泵改进能量平衡始终处于技术的zui前沿。力士乐的DFE电子变量泵在动态性能和精度方面都得到了认可，已经成为了塑机行业的标配。为了进一步节能，力士乐作为技术创新的*，提出了变转速DFEn泵控系统。DFEn系统是基于DFE泵，通过标准异步电动机来承担驱动功能，由力士乐动态变频器Fe 负责控制电机的转速，DFEn内置的电子控制器控制变频器的输出。PLC只输出压力和流量指令到DFEn控制器, 与控制其它泵控或阀控系统一样。 DFEn系统作为伺服泵系统的一种，其DFE泵的高响应特性弥补了普通异步电机和变频器的响应慢的缺点，保证了系统的高响应特性。得益于DFE泵摆角的快速相应特性（100%到0 流量，响应≤60ms），DFEn的响应速度不亚于伺服电机配定量泵系统。可以帮助客户有效缩短产品生产周期，提高产能。同时由于DFE泵*的负摆角功能，避免产生压力过冲，可媲美伺服电机配定量泵系统的反转功能。DFEn内置电子控制器做闭环压力流量控制保证了系统的高精度特性，保压精度≤0.2%，流量重复精度≤0.2%。能够大大减少产品飞边等问题，提高产品合格率，降低生产成本。DFEn系统合理分配泵摆角与电机转速达到耗电zui低，待机时，降低转速，消除多余能耗。在平均负载情况下，使用DFEn系统比原电子泵系统节约55%的电能。另外，由于电机的变转速驱动， DFEn系统将噪声平均降低了10-15dB。 与一般伺服电机配定量泵系统相比， DFEn采购费用也相对较低，特别突出应用于： - 为满足大型机器大流量控制，不得不配置多套伺服电机泵组而使成本增加较多； - 因生产部分需长时间保压、熔胶制品时，因伺服电机扭矩不够而需加大伺服电机与驱动规格，而增加机器成本时。 DFEn系统工作在高压、大流量条件下无时间限制，适合于任何机型。 DFEn也是市场上原广泛使用的恒速普通异步电机泵系统节能升级的福音。只要在原有系统增加一个变频器，如为DFEE则再升级先导阀至带数字控制的先导阀即可。升级成本低，而节能效果明显。 关于博世力士乐 博世力士乐是的传动与控制技术专家。凭借在传动、控制以及行走机械领域内的丰富经验，博世力士乐为80多个国家， 50多万家客户提供量身定制的解决方案，是世界工业、工厂自动化及行走机械应用市场上的*。2007年博世力士乐销售额近54亿欧元，拥有超过33,000多名专业员工。 自1978年开始，博世力士乐就开始了在中国的业务，并在上海、北京和常州三地建立了工厂。 更多信息请访问：www.boschrexroth.com.cn 作者: 博世力士乐中国 塑机应用组

4WE6电磁换向阀
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REXROTH换向阀
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