??優(yōu)勢力士樂溢流閥ZDB6VB1-4X/100V

武穴黎翔機電設備有限公司，詢價聯(lián)系人：何女士

詢價電話：0713-6542758，手機：18934630908????

詢價傳真：0713-6542758

詢價QQ:?736567721,704552157

現(xiàn)貨特價型號：R900925687?4WRAE10W1-30-22/G24N9K31/F1V??2臺

D634-371C?R24K02MONSS2????3臺DG4V-3-6C-M-U-H7-60????10臺

DG4V-3-2N-M-U-H7-60????15臺DG4V-3-2A-M-U-H7-60????10臺

H-507848??????????????30只??3DR16P5-5X/100Y/00M????1臺

　?采用雙閥芯技術(shù)的液壓系統(tǒng)，由于執(zhí)行機構(gòu)進出油側(cè)閥口閥芯位置及控制方式各自獨立，互不影響，這樣通過對兩閥芯控制方式的不同組合，利用軟件編程能很好解決傳統(tǒng)單閥系統(tǒng)不能解決的問題，同時還可以輕易實現(xiàn)傳統(tǒng)液壓系統(tǒng)中難以實現(xiàn)的功能。?

2、雙閥芯換向閥的兩種基本控制策略?

　　?由于雙閥芯換向兩油口控制的靈活性，兩油口可分別采取流量控制、壓力控制或流量壓力控制。正面介紹兩種簡單的控制策略。?

（1）負載方向在整個工作過程中保持不變?

　　?我們知道，對于汽車起重機、挖掘機、裝載機等而言，其液壓缸在整個工作過程中負載方向始終維持不變。下面以起重機變幅液壓缸為例來探討雙閥芯的控制策略。?

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　　?起重機變幅缸在工作過程中其受力，負載方向始終保持不變，因此我們可以采取液壓缸有桿控用壓力控制、無桿腔用流量控制的控制策略。?

　　?無桿腔流量控制是通過檢測連接到無桿腔側(cè)閥前后兩側(cè)的壓差，再根據(jù)所需流入或流出流量的多少，計算出閥芯開口大??；有桿腔側(cè)采用壓力控制，使該側(cè)維持一個低值的壓力，使得更加節(jié)能、高效。?

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　　?由于我們在無桿腔采用了流量控制，因此原控制系統(tǒng)中所用的平衡閥可用一個液控單向閥來代替。這樣可消除因平衡閥所帶來的系統(tǒng)不穩(wěn)定，從而提高系統(tǒng)穩(wěn)定性。?

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