美國(guó)PARKER派克齒輪泵合肥

派克PARKER齒輪泵的主要特點(diǎn)就是結(jié)構(gòu)簡(jiǎn)單、體積下、重量輕、轉(zhuǎn)速高且范圍大、自吸能力，對(duì)油液污染不敏感、工作、維護(hù)方便和格廉等，在般液壓傳動(dòng)系統(tǒng)中，特別是工程機(jī)械方面應(yīng)用的比較廣泛。由于齒輪兩端面與泵蓋的間隙以及齒輪的齒頂與泵體內(nèi)表面的間隙很小，因此，堆齒合的輪齒，將甭提、前后泵蓋和齒輪包圍的密封容積分割成左右兩個(gè)密封工作腔。當(dāng)原動(dòng)機(jī)帶動(dòng)齒輪旋轉(zhuǎn)時(shí)，右側(cè)的輪齒不斷推出齒合，而左側(cè)的輪齒不斷進(jìn)入齒合，因呲合點(diǎn)半徑小于齒頂圓半徑，右側(cè)推出齒合的輪齒露出齒間，其密封工作腔逐漸增大，行程局部真空，油箱中的油液在大氣壓力的作用下經(jīng)泵的吸油口進(jìn)入這個(gè)密封油腔-吸油腔。隨著齒輪的轉(zhuǎn)動(dòng)，吸入的油液被齒間轉(zhuǎn)移到左側(cè)的密封工作腔。左側(cè)進(jìn)入齒合的輪齒使密封油箱-壓油腔容積逐漸減小，把齒間油液擠出，從壓油口輸出，壓入液壓系統(tǒng)。這就是齒輪泵的吸油和壓油過(guò)程。

美國(guó)PARKER派克齒輪泵合肥
     派克齒輪泵設(shè)有差壓式安全閥作為超載保護(hù)，安全閥全回流壓力為泵額定排出壓力1.5倍。也可在允許排出壓力范圍內(nèi)根據(jù)實(shí)際需要另行調(diào)整。但是此安全閥不能作減壓閥長(zhǎng)期工作，需要時(shí)可在管路上另行安裝。該齒輪泵泵軸端密封設(shè)計(jì)為兩種形式，種是機(jī)械密封，另種是填料密封，可根據(jù)具體使用情況和用戶要求確定。

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