上海韋米機(jī)電設(shè)備有限公司

0532002014插裝溢流閥 德國原裝博世力士樂REXROTH插裝式溢流閥 電磁溢流閥 原裝現(xiàn)貨 正確產(chǎn)品保證

我公司有經(jīng)驗代理博世力士樂（BOSCH-REXROTH）、阿托斯ATOS、派克Parker、迪普馬DUPLOMATIC、油研YUKEN;本特利bentley、貝加萊B&R、西門子、光洋KOYO，美國ASCO，美國PARKER派克 等系列進(jìn)口產(chǎn)品 

0532002014插裝溢流閥

溢流閥是壓力控制閥。其作用主要是控制系統(tǒng)壓力，以保護(hù)油泵和油路系統(tǒng)的安全及保持油路系統(tǒng)的壓力恒定。通經(jīng)為8毫米的溢流閥是一個小型的直接動作的溢流閥，可以和主溢流閥的遙控口連接，對主溢流閥實現(xiàn)遠(yuǎn)程壓力調(diào)節(jié)。溢流閥的遙控口經(jīng)換向閥和油箱連接時，可使油路卸荷。此時溢流閥起卸荷作用。溢流閥的遙控口串聯(lián)換向閥和通經(jīng)為8毫米的溢流閥時，可實現(xiàn)壓力的多級控制。更換溢流閥的調(diào)節(jié)彈簧，可改變其壓力調(diào)節(jié)范圍。手輪順時針轉(zhuǎn)動時，壓力升高。

溢流閥一般有兩種結(jié)構(gòu)：1、直動型溢流閥 。2、先導(dǎo)式溢流閥。

對溢流閥的主要要求：調(diào)壓范圍大，調(diào)壓偏差小，壓力振擺小，動作靈敏，過載能力大，噪聲小。

先導(dǎo)型溢流閥的導(dǎo)閥部分結(jié)構(gòu)尺寸較小，調(diào)壓彈簧不必很強(qiáng)，因此壓力調(diào)整比較輕便。但因先導(dǎo)型溢流閥要在先導(dǎo)閥和主閥都動作后才能起控制作用，因此反應(yīng)不如直動型溢流閥靈敏。

與三節(jié)同心結(jié)構(gòu)相比，二節(jié)同心結(jié)構(gòu)的特點是：①主閥芯僅與閥套和主閥座有同心度要求，免去了與閥蓋的配合，故結(jié)構(gòu)簡單，加工和裝配方便。②過流面積大，在相同流量的情況下，主閥開啟高度��；或者在相同開啟高度的情況下，其通流能力大，因此，可做得體積小、重量輕。③主閥芯與閥套可以通用化，便于批量生產(chǎn)。

折彎機(jī)是鈑金行業(yè)工件折彎成形的重要設(shè)備，其作用是將鋼板根據(jù)工藝需要壓制成各種形狀的零件。如圖所示為液壓板料折彎機(jī)結(jié)構(gòu)示意圖，主要由左右立柱、工作臺、橫梁組成機(jī)架，左右油缸固定在立柱上，滑塊與油缸的活塞連接、沿固定在立柱上的導(dǎo)軌上下運(yùn)動，下模固定在工作臺上，上模安裝在滑塊下端，液壓系統(tǒng)提供動力，電氣系統(tǒng)給出指令，在油缸作用下，滑塊帶動上模向下與下模閉合實現(xiàn)板料的折彎。左右立柱、工作臺和滑塊（以下簡稱三大件）是折彎機(jī)的關(guān)鍵零件，三大件的重量之和占一臺折彎機(jī)總重量的70%~80%。其強(qiáng)度和剛性直接決定機(jī)床的運(yùn)行精度、使用壽命，以及工件的精度。

溢流閥供應(yīng)型號

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平衡閥的組成主要包括閥體，主閥芯，先導(dǎo)體，控制閥芯，彈簧座和阻尼孔。提升負(fù)載時，流動從A到B，使主閥芯打開。如果壓力下降（例如由于管子破裂），由于腔通著負(fù)載壓力，主閥芯立即關(guān)閉。下放負(fù)載（典型回路）這時流動從B至A。油口A經(jīng)方向閥通到油箱。足夠的油液進(jìn)入缸的有桿腔以造成所需的速度。油口X處的控制壓力與油口B的負(fù)載壓力之比為1:20。達(dá)到控制壓力時，主閥芯打開�？刂崎y芯使先導(dǎo)體升離閥座，而腔經(jīng)其內(nèi)孔和油口A向油箱回油。

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