力士樂制動閥R900905251 LT07MKA-20/100/02M動力制動閥現(xiàn)貨供應(yīng)

雙油路動力制動閥
LT 07
直接驅(qū)動減壓閥，采用 3 路設(shè)計和無級機(jī)械致動
適用于行走機(jī)械
較大入口壓力 200 bar
公稱壓力 40 … 140 bar
適用于模塊化設(shè)計

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特征
可選配角度傳感器，用以實(shí)現(xiàn)電子微動功能
由于安裝法蘭可自由轉(zhuǎn)動，可實(shí)現(xiàn)較優(yōu)布管
制動力與致動力成正比
磁滯特性低，速度恒定
制動回路的較大集成壓力限制
外部制動壓力可恢復(fù)
所有執(zhí)行器油口都位于一側(cè)
踏板角度可進(jìn)行人體工學(xué)調(diào)節(jié)
可選配附加式踏板 LT19 oder LT20
所有版本的踏板均配有可拆卸的防滑橡膠墊
安裝尺寸小
2x 系列
產(chǎn)品說明：雙回路動力制動閥 LT 07 是采用 3 路設(shè)計、帶有連續(xù)機(jī)械致動的直動式減壓閥。其次級回路存在較大的壓力限制。此外，次級回路（制動回路）中的持續(xù)壓力計量與致動元件（44）的路徑或踏板張角（8）成正比。倘若一個制動回路故障，則第二個制動回路仍然可通過兩個控制滑閥（22）的機(jī)械接觸起作用。踏板的致動力保持不變。
雙回路動力制動閥主要由殼體（1）和控制滑閥（2）、主調(diào)節(jié)彈簧（3）、致動元件（4）以及復(fù)位彈簧（5）和（6）組成。該閥門通過致動元件（4）操作。這樣會使兩個主調(diào)節(jié)彈簧（3）抵靠在兩個控制滑閥（2）上。首先，控制側(cè)在通道 T 處關(guān)閉，然后控制側(cè) SP 至 BR 打開，從而使兩個制動回路中的壓力均升高。隨后，制動管線中的壓力加大，同時作用于控制滑閥背后的制動壓力恢復(fù)裝置（7），使其抵靠在主調(diào)節(jié)彈簧（3）上，以使兩個制動回路中制動壓力（次級壓力）的增長與致動元件（4）的偏轉(zhuǎn)成正比。在致動元件的偏轉(zhuǎn)保持恒定的過程中，控制滑閥（2）移動到控制位置，并使進(jìn)入通道 BR1 和 BR2中的壓力保持恒定 ，其中通道 BR1 中的壓力僅比通道 BR2的高約 2 bar。致動元件的致動力與其偏轉(zhuǎn)成正比。
如果主調(diào)節(jié)彈簧（3被釋放，則復(fù)位彈簧將控制滑閥移回至起始位置。控制側(cè)從 SP 至 BR 關(guān)閉，并從 BR 至 T打開。從而釋放次級回路（制動回路）。
組合式機(jī)械/液壓驅(qū)動
制動閥可以利用踏板進(jìn)行機(jī)械控制和/或通過Pst 油口進(jìn)行液壓控制。帶旋轉(zhuǎn)角傳感器的型號（微動）當(dāng)驅(qū)動器輕輕地按壓制動踏板時，僅靜液壓驅(qū)動通過微動功能制動。旋轉(zhuǎn)角傳感器將踏板角度轉(zhuǎn)換成電氣輸出信號。增加踏板上的按壓力時，會導(dǎo)致靜液壓和工作制動同時制動。因此，制動過程由兩部分組成：電氣和液壓輸出信號。
泵的控制裝置通過機(jī)載電子元件連接至工作制動的電角度傳感器。在整體制動行動的較好個部分中，僅發(fā)送電氣信號，隨后使傳動泵通過電子系統(tǒng)（微動）回擺。在第二個部分中，液壓制動壓力加大（液壓制動）。
注意：對于帶旋轉(zhuǎn)角傳感器的型號，規(guī)定采用艙室裝配進(jìn)行傳感器裝配。

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R900702975 UPE2-1X/1,1R0,49/3A-0V
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R900702978 UPE2-1X/1,1 R1,25/3A-0V
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R900702981 UPE2-1X/1,1R4,00/3A-0V
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R900702985 UPE2-1X/1,1G5,60/4A-0V
R900702986 UPE2-1X/1,1G7,00/4A-0V
R900702987 UPE2-1X/1,1G8,80/4A-0V
R900702988 UPE2-1X/1,1G11,2/4A-0V
R900702989 UPE2-1X/1,1G14,0/4A-0V
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力士樂制動閥R900905251 LT07MKA-20/100/02M

制動閥，英文名稱：brake valve，汽車制動閥分為氣制動閥和液壓制動閥。制動閥的正常工作，對于駐車有著重要意義，它對于汽車能夠平穩(wěn)制動提供了技術(shù)支持。這一技術(shù)的發(fā)展，對于汽車制造、道路交通安全都有著極其重要的意義。
中重型汽車在下長坡等工況下頻繁使用主制動器會使制動系統(tǒng)的熱負(fù)荷非常大而制動系統(tǒng)又無法及時將熱量釋放到周圍環(huán)境使得制動鼓和制動蹄的溫度過高磨損較快，從而使主制動器失去部分或全部的制動效能，這將嚴(yán)重影響主制動系統(tǒng)的連續(xù)制動的效能，從而影響制動的安全性。而采用輔助制動裝置就可以減少主制動系統(tǒng)的使用頻率，減少因制動器連續(xù)使用產(chǎn)生的制動器溫度過高，效能下降，磨損嚴(yán)重等一系列問題。因此，輔助制動裝置的應(yīng)用越來越廣泛。輔助制動裝置主要包括：發(fā)動機(jī)制動器、排氣制動閥、液力緩速器和電渦流緩速器，而排氣制動閥作為一種性價比較高的輔助制動裝置在中重型汽車及客車上被廣泛應(yīng)用。

排氣制動閥在排氣制動裝置的位置和主要作用電控氣動式排氣制動裝置（見圖1）有排氣制動執(zhí)行機(jī)構(gòu)、控制機(jī)構(gòu)和斷油機(jī)構(gòu)三部分組成。排氣制動閥和排氣制動缸為排氣制動裝置的執(zhí)行機(jī)構(gòu)。排氣制動開關(guān)、油門踏板、和離合器踏板聯(lián)動開關(guān)、排氣制動工作指示燈、電磁閥和空氣管等構(gòu)成控制機(jī)構(gòu)，停油缸等則組成斷油機(jī)構(gòu)。排氣制動系統(tǒng)是由操縱缸和閥體組成的排氣制動閥以及控制電磁閥，供氣管、電器、電路等組成，排氣制動閥被安裝在發(fā)動機(jī)排氣管上。排氣制動時，按下排氣制動開關(guān)按鈕，排氣制動閥的蝶形閥機(jī)構(gòu)關(guān)閉排氣通道，使發(fā)動機(jī)活塞在排氣行程時受到氣體的反壓力，阻滯發(fā)動機(jī)運(yùn)轉(zhuǎn)而產(chǎn)生制動作用，達(dá)到控制車速的目的。當(dāng)排氣制動系統(tǒng)工作時，閥體中的閥片關(guān)閉，發(fā)動機(jī)在排氣沖程時，發(fā)動機(jī)氣缸和排氣管內(nèi)的廢氣被壓縮，這一過程所消耗的功，就產(chǎn)生對汽車的制動力。制動力的大小隨排氣管和發(fā)動機(jī)氣缸內(nèi)壓力(發(fā)動機(jī)背壓)的升高而加大。