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2019-06-13
力士樂(lè)比例閥的特點(diǎn)如下:
1)可實(shí)現(xiàn)壓力、速度的無(wú)極調(diào)節(jié),避免了常通的開(kāi)關(guān)式氣閥換向時(shí)的沖擊現(xiàn)象。
2)能實(shí)現(xiàn)遠(yuǎn)程控制和程序控制。
3)與斷續(xù)控制相比,系統(tǒng)簡(jiǎn)化,元件大大減少。
4)與液壓比例閥相比,體積小、重量輕、結(jié)構(gòu)簡(jiǎn)單、成本較低,但響應(yīng)速度比液壓系統(tǒng)慢得多,對(duì)負(fù)載變化也比較敏感。
5)使用功率小、發(fā)熱少、噪聲低。
6)不會(huì)發(fā)生火災(zāi),不污染環(huán)境。受溫度變化的影響小。
力士樂(lè)比例閥一般采用兩端承壓面積不等的差徑活塞結(jié)構(gòu)。比例閥不工作時(shí),差徑活塞2在彈簧3的作用下處于上極限位置,此時(shí)閥門1保持開(kāi)啟,因而在輸入控制壓力P1與輸出壓力P2從零同步增長(zhǎng)的初始階段,總是P1等于P2。但是壓力P1的作用面積A1為π(D2-d2)/4,壓力P2的作用面積A2為πD2/4,因而A2大于A1,故活塞上方液壓作用力大于活塞下方液壓作用力。在P1、P2同步增長(zhǎng)過(guò)程中,當(dāng)活塞上、下兩端液壓作用之差超過(guò)彈簧3的預(yù)緊力時(shí),活塞便開(kāi)始下移。當(dāng)P1和P2增長(zhǎng)到一定值PS時(shí)活塞2內(nèi)腔中的閥座與閥門1接觸,進(jìn)油腔與出油腔即為隔絕,使比例閥進(jìn)入平衡狀態(tài)。若進(jìn)一步提高P1則活塞將回升,閥門再度開(kāi)啟,油液繼續(xù)流入出油腔而使P2不斷升高,但由于A2大于A1,P2尚未增長(zhǎng)到新的P1值,活塞又下降到平衡位置。在任一平衡狀態(tài)下,差徑活塞的力的平衡方程為:P2路A2=P1路A1+F。
力士樂(lè)比例閥的現(xiàn)貨型號(hào):
R901014937 4WRZE16W6-150-7X/6EG24N9K31/F1D3M
0811404405 4WRL 25 V370M-3X/G24Z4/M
0811404207 4WRL 16 V200M-3X/G24Z4/M
0811405063 VT-VRRA 1-527-20/V0/2STV
0811405060 VT-VRRA1-527-20/V0
0811404039 4WRPH6C4B40L-2X/G24Z4/M
0811404035 4WRPH6C3B24L-2X/G24Z4/M
R901382357 4WRPEH 6 C3 B25P-3X/M/24A1
R900775889 4WRSE10V50-3X/G24K0/A1V-429
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R900616436 4WRZE25W5-325-7X/6EG24N9ETK31/F1D3V
R900927356 4WREE 10 E-75/2X/G24K31/F1V
R900909367 4WREE6V08-2X/G24K31/A1V
R900927230 4WREE 10 E75-2X/G24K31/A1V
R900927233 4WREE 10 W75-2X/G24K31/A1V
R901382349 4WRPEH 6 C3 B24L-3X/M/24F1
R900928553 4WREE6E1-32-2X/G24K31/A1V
R901218100 3DREME 16 P-7X/200YG24K31F1V
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R900020154 VT3002-1-2X/48F
R900500051 DR10DP2-4X/150Y
R901010980 VT-MSPA2-1-1X/V0/0
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R901002090 VT-VSPA2-1-2X/V0/T1
R900020153 VT3002-1-2X/32D
R900579497 VT-5035-17
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R901102721 HED8OP-20/200K14
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R900912156 4WREE 6 E08-2X/G24K31/A1V
R900617676 4WRZE 10 E85-7X/6EG24N9ETK31/A1D3M
R900955887 3DREP 6 C-2X/25EG24N9K4/M
R901057060 VT-VRPA1-151-1X/V0/0
R900958848 3DREPE 6 C-2X/25EG24N9K31/F1M
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R983037970 DBDS10K1X/315
R900424152 DBDS10K1X/400
R983037971 DBDS10K1X/025
R983037979 DBDS10P1X/25
R900424158 DBDS10P1X/315
R983038018 DBDS20G1X/315
R983038022 DBDS20K1X/100
R983038017 DBDS20K1X/315
R900424278 DBDS20P1X/315
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R983037920 DBDS6K1X/100
R900423724 DBDS6K1X/200
R983037922 DBDS6K1X/315
R983037927 DBDS6K1X/400
R983037936 DBDS6P1X/200
R983037923 DBDS6P1X/315
R983034413 LC220E7X
R983030666 S10A1.0
R983030667 S10A2.0
R983030669 S10A5.0
R900420525 S20A1.0
R900420529 S20A3.0
R983030675 S30A0.0
R983030676 S30A1.0
R983030677 S30A2.0
R983030679 S30A5.0
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