4WE10H5X/HG24N9K4/M電磁換向閥由上海韋米機(jī)電設(shè)備有限公司專業(yè)提供
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4WE10H5X/HG24N9K4/M電磁換向閥
類型:
交流(D,36V或220V或380V)
直流(E,24V或100V )
干式、濕式
交流電磁鐵:使用電壓為交流110、220、380V。特點(diǎn)是啟動(dòng)力大，不需要專門的電源，吸合、釋放快，動(dòng)作時(shí)間約為0.01 ~0.03s。缺點(diǎn)是電源電壓下降15%以上，電磁鐵吸力明顯減小，若銜鐵不動(dòng)作，干式電磁鐵會(huì)在10~15min (濕式1~1.5h) 后燒壞線圈，且沖擊及噪聲大，壽命低，允許切換頻率為10次1分。
直流電磁鐵:使用電壓為直流110和24V,工作可靠，吸合釋放時(shí)間約為0.05~ 0.08s,切換頻率般為120次/分，沖擊小、體積小、壽命長(zhǎng)，但需要專門的直流電源，成本高。
交流本整型電磁鐵:電磁鐵是直流的，電磁鐵本身帶整流器，通入交流電經(jīng)整流后再供給直流電磁鐵。
干式電磁鐵:電磁鐵線圈、鐵芯與軛鐵處于空氣中而不和油液接觸。電磁鐵與閥連接時(shí)，在推桿處設(shè)置密封圈，避免了油液進(jìn)入電磁鐵，而且裝拆方便。為了防止回油進(jìn)入干式電磁鐵中，要求換向閥的回油壓力不能太高。
濕式電磁鐵:濕式電磁鐵的推桿與閥芯連成一體,取消了推桿處的動(dòng)密封，所以摩擦力小，復(fù)位性能好，冷卻潤(rùn)滑好，工作壽命長(zhǎng)。
結(jié)構(gòu)和工作原理
WE型電磁換向閥采用濕式交流或直流電磁鐵。該閥是通過(guò)電磁鐵控制閥芯的不同工作位置。當(dāng)電磁鐵斷電時(shí)，閥芯靠彈簧壓力保持在中間或終端位置(脈沖式閥除外)。電磁鐵通電，閥芯被推到工作位置上，斷電后又恢復(fù)到初始狀態(tài)。這時(shí)用手推動(dòng)故障檢查按鈕可使閥芯移動(dòng)。
由于濕式電磁鐵內(nèi)部與回油腔相通，這樣銜鐵油里移動(dòng)，可以減少磨損、緩沖，并且提高了散熱性能，提高了使用壽命。交流電磁鐵具有動(dòng)作時(shí)間短，電氣控制線路簡(jiǎn)單，不需特殊的觸頭保護(hù)等特點(diǎn)。直流電磁鐵是切換特性軟，動(dòng)作頻率高，對(duì)過(guò)載或低電壓反應(yīng)不敏感，工作可靠。
WE型換向閥是由電磁鐵控制的滑閥式換向閥，它主要用于控制液體的通斷和流動(dòng)方向。
其結(jié)構(gòu)主要是由閥體、電磁鐵、滑閥以及復(fù)位彈簧等組成。在不通電的情況下被復(fù)位彈簧保持在中間位置或初始位置上(脈沖閥除外)。電磁鐵的推力通過(guò)推桿作用在滑閥上，并且把它從靜止位置推到工作位置上(終端位置)，由此改變了液流的方向P→A和B→T或者P→B和A→T。當(dāng)電磁鐵斷電后，滑閥被復(fù)位彈簧重新推到原來(lái)的靜止位置上。在電磁鐵斷電時(shí)，用故障檢查按鈕推動(dòng)滑閥移動(dòng)。
電磁換向閥型號(hào)
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