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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>河南正規(guī)出油閥哪家好</p><p><span>***更新：</span>2020-06-23 18:19:53</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3nw8qnp" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">龍口市海特機(jī)械制造廠</a></p><p><span>聯(lián)系人：</span>傅文蓬</p><p><span>郵箱: </span>fuwp317@163.com</p><p><span>電話: </span>13964511317</p><p><span>傳真: </span>0535_8953396</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0535-8953396</p><p><span>地址: </span>山東省龍口市龍口高新技術(shù)產(chǎn)業(yè)園區(qū)朗源路166號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="pzw8ho2" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="8suprvh" class="box"><p><p style="text-indent:25px">出油閥是噴油泵內(nèi)精密偶件之一，在噴油過(guò)程中擔(dān)負(fù)著重要任務(wù)對(duì)控制高壓系統(tǒng)的殘余壓力，河南正規(guī)出油閥哪家好、噴油時(shí)刻、噴油規(guī)律、速度特性等都起著關(guān)鍵作用。 1894年魯?shù)罓柗颉さ胰麪柌裼蜋C(jī)采用了燃料泵直噴裝置。20世紀(jì)90年代誕生了高壓噴射技術(shù)，當(dāng)時(shí)英國(guó)人圓滿地解決了當(dāng)時(shí)作為主要課題的燃油計(jì)量、密封、輸送和分配問(wèn)題。而這種系統(tǒng)的主要特征就是采用了一個(gè)止回閥單向閥，以此使穩(wěn)定和均勻的噴射成為可能。但當(dāng)在發(fā)動(dòng)機(jī)轉(zhuǎn)速較高和噴油量較大的情況下使用這種閥會(huì)增加二次噴射的傾向，并促使炭煙形成。造成壓力波動(dòng)的原因是噴油嘴端正向壓力波的反射而且隨轉(zhuǎn)速與負(fù)荷的增加而加重。之后由瑞典的公司通過(guò)采用一個(gè)減壓式出油閥將這一問(wèn)題解決。當(dāng)供油結(jié)束時(shí)使噴油系高壓容積擴(kuò)大，一個(gè)固定容積從而使壓力下降，河南正規(guī)出油閥哪家好。由于以后發(fā)展的燃燒過(guò)程要求有更高的噴油壓力，所以又產(chǎn)生了一個(gè)新的問(wèn)題—— 穴蝕。為獲得安全無(wú)二次噴射，這種只能在一個(gè)工況點(diǎn)上獲得比較好效果的等容出油閥通常需要一個(gè)很大的減壓容積，河南正規(guī)出油閥哪家好，這樣就會(huì)在噴油嘴、噴油管和噴油器體中產(chǎn)生空穴。由反射或是供油壓力波沖擊性填補(bǔ)這些空穴就會(huì)引起眾所周知的材料破壞。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南正規(guī)出油閥哪家好" src="http://tyunfile.71360.com/UpLoadFile/yantai1001/2019/6/636970830918951843/6369708309189518436752250.jpg"></div><p style="text-indent:25px">等壓出油閥等壓出油閥的結(jié)構(gòu)特點(diǎn)是在出油閥芯內(nèi)裝上一組由等壓閥和彈簧等零件組成的單向閥。供油時(shí)整個(gè)出油閥開(kāi)啟，供油結(jié)束后出油閥關(guān)閉，這時(shí)如果油管壓力大于單向閥開(kāi)啟壓力，將克服彈簧力的作用打開(kāi)等壓閥使油管壓力降低，如果油管壓力低于單向閥開(kāi)啟壓力，則在彈簧力的作用下關(guān)閉等壓閥。這樣在各種工況下供油結(jié)束后的殘余壓力能自動(dòng)調(diào)節(jié)，并保持在高于大氣壓的某一水平上，因此稱它為等壓出油閥。阻尼出油閥阻尼出油閥通常是在等容出油閥上裝一阻尼閥，其上開(kāi)有一節(jié)流小孔。供油時(shí)出油閥打開(kāi)后，阻尼閥克服彈簧力升起，燃油可不受阻礙地進(jìn)入高壓油管。供油結(jié)束，柱塞高壓腔內(nèi)壓力降低，在阻尼彈簧的作用下阻尼閥在出油閥落座前迅速關(guān)閉，只有阻尼閥中節(jié)流小孔通油。由于小孔的節(jié)流作用，出油閥的落座速度減慢，并能延緩壓力的下降速度，這樣可以防止氣泡產(chǎn)生減少穴蝕，同時(shí)由于小孔節(jié)流的影響使反射波受阻而衰減，因此又有防止二次噴射的作用。阻尼出油閥結(jié)構(gòu)簡(jiǎn)單，但高壓油管中殘余壓力仍隨工況變化，高噴射壓力下變工況的穩(wěn)定性較等壓出油閥差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南正規(guī)出油閥哪家好" src="http://tyunfile.71360.com/UpLoadFile/yantai1001/2019/6/636970830870747843/6369708308707478432677255.jpg"></div><p style="text-indent:25px">出油閥是一個(gè)單向閥，在彈簧壓力作用下，閥上部圓錐面與閥座嚴(yán)密配合，其作用是在停供時(shí)，將高壓油管與柱塞上端空腔隔絕，防止高壓油管內(nèi)的油倒流入噴油泵內(nèi)。節(jié)流式出油閥閥體、出油閥彈簧及彈簧座都由一只減容器代替。設(shè)計(jì)原則是，從噴油嘴反射的壓力波通過(guò)節(jié)流后使再次反射回去的波幅減小，使針閥不至于再次開(kāi)啟，并且利用這一點(diǎn)使高壓油路在允許的相當(dāng)小減壓容積范圍內(nèi)實(shí)現(xiàn)減壓。在供油間歇期間，高壓油管內(nèi)壓力與低壓油腔壓力通過(guò)節(jié)流孔保持平衡減弱或二次噴射及穴蝕現(xiàn)象的產(chǎn)生。這種節(jié)流閥的突出優(yōu)點(diǎn)在于，在不增加噴油泵凸輪傳動(dòng)機(jī)構(gòu)負(fù)荷的情況下能達(dá)到明顯提高噴油壓力的目的。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/365225.html</p></div></div></div></div></div><div id="p8um22z" class="page-right twoColRt"><div id="kz7ovmo" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="t3t7ur8" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" 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