REXROTH換向閥

REXROTH換向閥 節能降噪新概念 只需在原有系統增加一個變頻器，即刻享有高效節能新動力

在過去數十年間，塑機行業采用比例及高頻響閥，并通過使用電子泵改進能量平衡始終處于技術的zui前沿。力士樂的DFE電子變量泵在動態性能和精度方面都得到了認可，已經成為了塑機行業的標配。為了進一步節能，力士樂作為技術創新的*，提出了變轉速DFEn泵控系統。DFEn系統是基于DFE泵，通過標準異步電動機來承擔驅動功能，由力士樂動態變頻器Fe 負責控制電機的轉速，DFEn內置的電子控制器控制變頻器的輸出。PLC只輸出壓力和流量指令到DFEn控制器, 與控制其它泵控或閥控系統一樣。 DFEn系統作為伺服泵系統的一種，其DFE泵的高響應特性彌補了普通異步電機和變頻器的響應慢的缺點，保證了系統的高響應特性。得益于DFE泵擺角的快速相應特性（*到0 流量，響應≤60ms），DFEn的響應速度不亞于伺服電機配定量泵系統。可以幫助客戶有效縮短產品生產周期，提高產能。同時由于DFE泵*的負擺角功能，避免產生壓力過沖，可媲美伺服電機配定量泵系統的反轉功能。DFEn內置電子控制器做閉環壓力流量控制保證了系統的高精度特性，保壓精度≤0.2%，流量重復精度≤0.2%。能夠大大減少產品飛邊等問題，提高產品合格率，降低生產成本。DFEn系統合理分配泵擺角與電機轉速達到耗電zui低，待機時，降低轉速，消除多余能耗。在平均負載情況下，使用DFEn系統比原電子泵系統節約55%的電能。另外，由于電機的變轉速驅動， DFEn系統將噪聲平均降低了10-15dB。 與一般伺服電機配定量泵系統相比， DFEn采購費用也相對較低，特別突出應用于： - 為滿足大型機器大流量控制，不得不配置多套伺服電機泵組而使成本增加較多； - 因生產部分需長時間保壓、熔膠制品時，因伺服電機扭矩不夠而需加大伺服電機與驅動規格，而增加機器成本時。 DFEn系統工作在高壓、大流量條件下無時間限制，適合于任何機型。 DFEn也是市場上原廣泛使用的恒速普通異步電機泵系統節能升級的福音。只要在原有系統增加一個變頻器，如為DFEE則再升級先導閥至帶數字控制的先導閥即可。升級成本低，而節能效果明顯。 關于博世力士樂 博世力士樂是的傳動與控制技術專家。憑借在傳動、控制以及行走機械領域內的豐富經驗，博世力士樂為80多個國家， 50多萬家客戶提供量身定制的解決方案，是世界工業、工廠自動化及行走機械應用市場上的*。2007年博世力士樂銷售額近54億歐元，擁有超過33,000多名專業員工。 自1978年開始，博世力士樂就開始了在中國的業務，并在上海、北京和常州三地建立了工廠。 更多信息請訪問：www.boschrexroth.com.cn 作者: 博世力士樂中國 塑機應用組

4WE6電磁換向閥
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REXROTH換向閥
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