進(jìn)口布赫閥W2N32ON-6AB2 24V DC
武穴黎翔機(jī)電設(shè)備有限公司,詢價聯(lián)系人:何女士
詢價電話:0713-6542758,手機(jī):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
液壓系統(tǒng)設(shè)計(jì)時為提高系統(tǒng)穩(wěn)定性,減少負(fù)載變化對速度的影響,要么犧牲部分我們想實(shí)現(xiàn)的功能,要么增加額外的液壓元件,如調(diào)速閥、壓力控制閥等,通過增加阻尼,提高系統(tǒng)速度剛度來提高系統(tǒng)的穩(wěn)定性。但是這樣元件的增加又會降低效率,浪費(fèi)能源;還會使得整個系統(tǒng)的可靠性降低、增加成本。
(2)由于換向結(jié)構(gòu)的特殊性,使得用戶在實(shí)現(xiàn)某一功能時必須購買相應(yīng)的液壓元件,再加上工程機(jī)械廠家會根據(jù)不同最終用戶要求設(shè)計(jì)出相應(yīng)的功能,這樣會造成生產(chǎn)廠家采購?fù)悺⒍嘁?guī)格的液壓控制元件來滿足不同功能要求的需要,不利于產(chǎn)品通用化及產(chǎn)品管理,同時會大大提高產(chǎn)品成本。
SR3C10T-0G12,SR3C16T-0G12,SR3C25T-0G12,SR3C32T-0G12,SR3C40T-0G12,EEX-WED-42-AG-6-3 24V DC,EEX-WED-42-AG-6-3 230V AC,EEX-WED-43-D-6-V-3 115V AC,EEX-WED-43-D-6-3 230V AC,EEX-WED-43-D-6-V-3 230V AC,LVS08*P3A4DJ21A00B-J3,LVS08PP4D5DJ00A00B-NN,LVS08FF4E5BJ00A00B-A*,LVS08PP4D5DJ00A00B,LVS08PP4A5DJ21A00B,LVS12FF4D5GJ21*00A-NN,LVS12FG6D5GJ21*00A-SS,LVS12LL4D5GJ22*00A-SS,LVS12FF4D5GJ21*00A-QQ。。。
MRP-2D-10-0813-2,MRP-2D-10-1222-2,MRP-2D-10-0609-2,MRP-2C-10-0813-2,MRP-2D-10-0305-2,MRP-2C-10-0609-2,MRP-2D-10-1222-2 M288,MRP-2D-10S-0813-2 M283A,MRP-2C-10-1222-2,MRP-2C-10-2040-2,MRP-2D-10-002007V-2。。。
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(3)由于執(zhí)行機(jī)構(gòu)進(jìn)出液壓油通過一根閥芯進(jìn)行控制,單獨(dú)控制執(zhí)行機(jī)構(gòu)兩側(cè)壓力是不可能的。因此,出油側(cè)背壓作用于執(zhí)行機(jī)構(gòu)運(yùn)動的反方向,隨著出油側(cè)背壓升高,為保質(zhì)執(zhí)行機(jī)構(gòu)的運(yùn)動,必須提高進(jìn)油側(cè)壓力。這樣會使得液壓系統(tǒng)消耗的功能增加,效率低,發(fā)熱增加。
QT21-010R
QT81-400R
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采用雙閥芯技術(shù)的液壓系統(tǒng),由于執(zhí)行機(jī)構(gòu)進(jìn)出油側(cè)閥口閥芯位置及控制方式各自獨(dú)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(shí)現(xiàn)傳統(tǒng)液壓系統(tǒng)中難以實(shí)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(fù)載方向在整個工作過程中保持不變
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我們知道,對于汽車起重機(jī)、挖掘機(jī)、裝載機(jī)等而言,其液壓缸在整個工作過程中負(fù)載方向始終維持不變。下面以起重機(jī)變幅液壓缸為例來探討雙閥芯的控制策略。
起重機(jī)變幅缸在工作過程中其受力,負(fù)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。
CINDY 16-B-SND-S150-L-E6-3
CINDY 16-B-SND-S100-L-D16-1
CINDY 16-B-SNS-S150-L-D12-1
CINDY 16-B-SND-S100-L-G6-15
CINDY 16-B-SNS-S200-A-G6-5-SVA...
CINDY 16-B-SNO-S100-A-G10-1-SVA...
CINDY 16-B-SND-S150-A-D7-5-SVA...
CINDY 16-B-SND-S100-A-D8-1-SVA...
CINDY 16-B-SNS-S150-A-G12-1-SVA...
CINDY 16-B-SNS-S150-A-H9-1-SVA...
CINDY 16-B-SNS-S100-A-G10-1-SVA...
CINDY 16-B-SNS-S150-A-H12-1-SVA...
CINDY 16-B-SNO-S100-A-D9-2-SVA...
CINDY 16-B-SND-S100-A-G29-1-SVA...
CINDY 20-B-SNS-S300-A-G21-1
CINDY 20-B-SNO-S150-A-G10-1
CINDY 20-B-SND-S300-A-D16-1
CINDY 20-B-SNS-S240-L-G36-1-B
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(jì)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。
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。
(2)負(fù)載方向在工作過程中發(fā)生改變
在這種情況下,采取“進(jìn)油側(cè)壓力控制,出
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