生活在一個(gè)“充滿虛假消息”的世界里，要弄清楚什么是真實(shí)，什么是虛假，真的很難。

鑒于追尋真相人人有責(zé)，我們認(rèn)為有必要花一些時(shí)間來幫助大家區(qū)分關(guān)于泵的真相與謊言了。

一些葉輪泵制造商經(jīng)常利用貿(mào)易雜志宣傳商品的“卓越液壓效率”。千萬不要買!他們的理論是，即便葉片摩擦到外殼，也不會(huì)發(fā)生任何“滑動(dòng)”。但是他們沒有提到，在轉(zhuǎn)子和側(cè)板之間的泵的兩端發(fā)生的滑移量相對(duì)較高。而我們的斜齒齒輪泵具有自然的作用，它們將齒輪相互推壓并迫使一個(gè)朝著面板，另一個(gè)朝向后背板。

這樣就減少了沿泵側(cè)面的滑動(dòng)量。有老式葉輪泵的人員可以看到包括滑動(dòng)曲線在內(nèi)的性能曲線。幾年前，某個(gè)較大的制造商淘汰了滑動(dòng)曲線，僅提供特定粘度點(diǎn)和壓力曲線。如今，滑動(dòng)“內(nèi)置”到實(shí)際的流量曲線里，(可以對(duì)他們)不可見。我們也可以做到這一點(diǎn)，但更重要的是，提供所需的精確工具來確定泵的尺寸。

幾年前，我們的3600系列增加了兩個(gè)新的泵尺寸，是專門針對(duì)市場上常見的3寸葉輪泵之一。3632型和3643型只是向外抽吸葉輪泵。(見圖)。大多數(shù)情況下，3632比3寸葉輪泵便宜，可用于幾乎所有惡劣情況下的應(yīng)用。

品牌介紹

Roper Pump公司在1857年建立初期是手動(dòng)井泵制造商，并已發(fā)展成為齒輪泵，螺桿泵，分流器和泥漿馬達(dá)領(lǐng)域的領(lǐng)先制造商。該公司是Roper工業(yè)科技集團(tuán)的一部分，以其多元化的發(fā)展戰(zhàn)略和增加股東價(jià)值的良好記錄而聲名遠(yuǎn)播。

我們的創(chuàng)新和以客戶為中心的理念使公司度過了1929年大蕭條時(shí)期，如今仍是我們進(jìn)步的原動(dòng)力。我們的工程師與客戶密切合作，為各種特殊應(yīng)用和不斷變化的市場規(guī)格制定新的解決方案，在不犧牲產(chǎn)品質(zhì)量的前提下，制定和實(shí)施高效的制造工藝。我們的工程團(tuán)隊(duì)和銷售團(tuán)隊(duì)會(huì)協(xié)同執(zhí)行我們的承諾，提供優(yōu)質(zhì)的產(chǎn)品和卓越的客戶服務(wù)。

Roper Pump銷售代理商

四川鼎恒石油機(jī)械設(shè)備有限公司(http://www.cx-shenghe.com)是一家擁有進(jìn)出口經(jīng)營權(quán)，長期從事國內(nèi)外石油天然氣設(shè)備和配件的專業(yè)銷售公司。鼎恒石油公司總部設(shè)在四川成都，在加拿大大不列顛哥倫比亞省成立了分公司。我公司與多家世界知名制造廠商建立了緊密的合作關(guān)系。

若：需要購買Roper Pump產(chǎn)品或需要了解產(chǎn)品詳細(xì)參數(shù)及相關(guān)疑問，可直接進(jìn)入鼎恒石油官網(wǎng)咨詢網(wǎng)站客服及撥打銷售熱線18000522697。

注：該文章由鼎恒石油編譯，轉(zhuǎn)發(fā)須注明出處。

附英文原文：

THE VANE PUMP EFFICIENCY MYTH

In a world of “fake news” it’s definitely harder to figure out what’s real and what isn’t.

Since stretching the truth isn’t limited to politics we thought we’d spend some time separating pump fact from pump fiction.

some vane pump manufacturers frequently blitz trade magazines with articles touting their “superior hydraulic efficiency”. Don’t buy it. Their argument is that since the vanes rub on the case, there isn’t any “slip”. The one thing that they fail to mention though is the relatively high amount of slip that occurs on both ends of the pump between the rotor and side plates. Our helical gear pump has a natural action that pushes the gears against each other and forces one towards the face plate and the other towards the back plate.

This reduces the amount of slip along the sides of the pump. Those of you with old vane pump catalogs will see performance curves that include a slip curve. Several years ago one of the larger manufactures eliminated the slip curves and only provided curves at specific viscosity points and pressures. The slip is now “built-in” to the actual flow curve and (hopefully for them) invisible. We could do that too but believe it’s more important to provide accurate tools needed to size the pump correctly.

A few years ago we added 2 new pump sizes to the 3600 family that specifically address flow rates versus the one of the most common 3” vane pumps in the market. Our models 3632 and 3643 simply out-pump this vane pump. (See graph). On top of that in most cases the 3632 is less expensive than a 3” vane pump and in virtually all cases more forgiving in tough applications.