力士樂(lè)REXROTH齒輪泵R9009688154WRZ25R325-7X/6EG24N9EK4/D3V

德國(guó)力士樂(lè)REXROTH齒輪泵0510525018力士樂(lè)REXROTH齒輪泵是依靠泵缸與嚙合齒輪間所形成的工作容積變化和移動(dòng)來(lái)輸送液體或使之增壓的回轉(zhuǎn)泵。由兩個(gè)齒輪、泵體與前后蓋組成兩個(gè)封閉空間，當(dāng)齒輪轉(zhuǎn)動(dòng)時(shí)，齒輪脫開(kāi)側(cè)的空間的體積從小變大，形成真空，將液體吸入，齒輪嚙合側(cè)的空間的體積從大變小，而將液體擠入管路中去。吸入腔與排出腔是靠?jī)蓚€(gè)齒輪的嚙合線來(lái)隔開(kāi)的。力士樂(lè)REXROTH齒輪泵的排出口的壓力*取決于泵出處阻力的大小。zui基本形式就是兩個(gè)尺寸相同的齒輪在一個(gè)緊密配合的殼體內(nèi)相互嚙合旋轉(zhuǎn)，這個(gè)殼體的內(nèi)部類似“8”字形，兩個(gè)齒輪裝在里面，齒輪的外徑及兩側(cè)與殼體緊密配合。來(lái)自于擠出機(jī)的物料在吸入口進(jìn)入兩個(gè)齒輪中間，并充滿這一空間，隨著齒的旋轉(zhuǎn)沿殼體運(yùn)動(dòng)，zui后在兩齒嚙合時(shí)排出。
力士樂(lè)REXROTH齒輪泵也叫正排量裝置，即像一個(gè)缸筒內(nèi)的活塞，當(dāng)一個(gè)齒進(jìn)入另一個(gè)齒的流體空間時(shí)，液體就被機(jī)械性地?cái)D排出來(lái)。因?yàn)橐后w是不可壓縮的，所以液體和齒就不能在同一時(shí)間占據(jù)同一空間，這樣，液體就被排除了。由于齒的不斷嚙合，這一現(xiàn)象就連續(xù)在發(fā)生，因而也就在泵的出口提供了一個(gè)連續(xù)排除量，泵每轉(zhuǎn)一轉(zhuǎn)，排出的量是一樣的。隨著驅(qū)動(dòng)軸的不間斷地旋轉(zhuǎn)，泵也就不間斷地排出流體。泵的流量直接與泵的轉(zhuǎn)速有關(guān)。
在泵內(nèi)有很少量的流體損失，這使泵的運(yùn)行效率不能達(dá)到*，因?yàn)檫@些流體被用來(lái)潤(rùn)滑軸承及齒輪兩側(cè)，而泵體也絕不可能無(wú)間隙配合，故不能使流體*地從出口排出，所以少量的流體損失是必然的。然而泵還是可以良好地運(yùn)行，對(duì)大多數(shù)擠出物料來(lái)說(shuō)，仍可以達(dá)到93%～98%的效率。
對(duì)于粘度或密度在工藝中有變化的流體，這種泵不會(huì)受到太多影響。如果有一個(gè)阻尼器，比如在排出口側(cè)放一個(gè)濾網(wǎng)或一個(gè)限制器，泵則會(huì)推動(dòng)流體通過(guò)它們。如果這個(gè)阻尼器在工作中變化，亦即如果濾網(wǎng)變臟、堵塞了，或限制器的背壓升高了，則泵仍將保持恒定的流量，直至達(dá)到裝置中zui弱的部件的機(jī)械極限(通常裝有一個(gè)扭矩限制器)。
PEP－II泵的齒輪與軸共為一體，采用通體淬硬工藝，可獲得更長(zhǎng)的工作壽命。“D”型軸承結(jié)合了強(qiáng)制潤(rùn)滑機(jī)理，使聚合物經(jīng)軸承表面，并返回到泵的進(jìn)口側(cè)，以確保旋轉(zhuǎn)軸的有效潤(rùn)滑。這一特性減少了聚合物滯留并降解的可能性。精密加工的泵體可使“D”型軸承與齒輪軸精確配合，確保齒輪軸不偏心，以防齒輪磨損。Parkool密封結(jié)構(gòu)與聚四氟唇型密封共同構(gòu)成水冷密封。這種密封實(shí)際上并不接觸軸的表面，它的密封原理是將聚合物冷卻到半熔融狀態(tài)而形成自密封。也可以采用Rheoseal密封，它在軸封內(nèi)表上加工有反向螺旋槽，可使聚合物被反壓回到進(jìn)口。為便于安裝，制造商設(shè)計(jì)了一個(gè)環(huán)形螺栓安裝面，以使與其它設(shè)備的法蘭安裝相配合，這使得筒形法蘭的制造更容易。
PGH型內(nèi)嚙合力士樂(lè)REXROTH齒輪泵
定量泵
定排量
低噪聲
低的流量脈動(dòng)
由于采用間隙密封的補(bǔ)償即使在低速和低粘度油液時(shí)也有高的效率，適用于廣范圍的各種粘度和轉(zhuǎn)速所有規(guī)格可自由組合組成組合泵能和PGF型內(nèi)力士樂(lè)REXROTH齒輪泵、軸向柱塞泵和葉片泵組成多聯(lián)泵
能用HFC液體工作（密封件型號(hào)W）
PGH型液壓泵是泄漏間隙補(bǔ)償結(jié)構(gòu)的定排量?jī)?nèi)嚙合力士樂(lè)REXROTH齒輪泵。
它的主要組成部分有泵體(1)，軸承(1 1)，內(nèi)齒輪(2)，帶軸外齒輪(3)，滑動(dòng)軸承(4)，前、后蓋(5)，端蓋(6)，安裝法蘭(7)，和定位銷(xiāo)(8)以及由弧形體(9 1)、支架(9 2)和密封墊(9 3)組成的弧形元件(9)。曖入和排出原理支承在油膜軸承上的帶軸外齒輪(3)驅(qū)動(dòng)內(nèi)齒輪(2)以一定的方向轉(zhuǎn)動(dòng)。轉(zhuǎn)動(dòng)時(shí)，在約90 e范圍的吸油區(qū)內(nèi)體積增加。產(chǎn)生吸力，流體進(jìn)入吸油區(qū)。月牙形的弧形元件(9)將吸油腔和排油腔隔開(kāi)。在排油腔外齒輪(3)的齒和內(nèi)齒輪(2)齒嚙合，流體就從排油腔(P)排出。軸向間隙補(bǔ)償，軸向補(bǔ)償力FA由前、后蓋(5)間的壓力場(chǎng)(10)產(chǎn)生，作用在排油腔內(nèi)的軸向浮動(dòng)板上。由于工作壓力的作用，這兩個(gè)弧形元件(9 1)和(9 2)壓向外齒輪(3)和內(nèi)f 2）的齒頂。弧形體和弧形支架的面積比和密封圈(g 3)的位置設(shè)計(jì)得使內(nèi)齒輪(2)、弧形體(9)和外齒輪(3)之間達(dá)到可靠的密封。彈性元件密封圈(9 3)能保證即使在很低的壓力下這些元件間也有適當(dāng)?shù)慕佑|壓力。液*承和油膜軸承作用在帶軸外齒輪(3)上的力由油膜潤(rùn)滑的徑向滑動(dòng)軸承(4)承受；作周在內(nèi)齒輪(2)上的力由靜*承(11)承受。
兩個(gè)齒輪均為漸開(kāi)線式齒輪加工，較長(zhǎng)的嚙合長(zhǎng)度使泵的排量和壓力脈動(dòng)較小。這使泵的運(yùn)行噪聲大大降低。

力士樂(lè)REXROTH齒輪泵R9009688154WRZ25R325-7X/6EG24N9EK4/D3V
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