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降低渣漿泵的轉(zhuǎn)速能不能提高水泵壽命
提高泵零件壽命另個(gè)途徑是降低泵的轉(zhuǎn)速。同時(shí)，由于既降低了液流速度又降低了固體顆粒在葉片正面上的濃度，葉輪磨損量大大減少。但是，當(dāng)Q= const和H= const時(shí)，由于轉(zhuǎn)速n降低，將導(dǎo)致泵比轉(zhuǎn)數(shù)下降和壓水室磨損量增大，所以應(yīng)該評(píng)價(jià)所有易損件的相對(duì)壽命。
由于渣漿泵廠家轉(zhuǎn)速降低，葉輪壽命有明顯提高，在不同轉(zhuǎn)速時(shí)泵參數(shù)相應(yīng)變化的情況下，使用同一臺(tái)泵是合理的。這樣在抽送細(xì)顆粒低磨蝕性固液混合物時(shí)應(yīng)該提高轉(zhuǎn)速，而在抽送強(qiáng)磨蝕固液混合物特別是含大顆粒固液混合物時(shí)，在參數(shù)相應(yīng)降低的情況下應(yīng)該降低轉(zhuǎn)速。
為了減少葉輪(前蓋板和副葉片)在由于沖角很大使液流強(qiáng)烈脫流而產(chǎn)生的小流量區(qū)工作時(shí)的磨損量，采用專(zhuān)門(mén)襯里的吸入管的辦法適當(dāng)?shù)靥岣呷~輪入口液流速度。
Can Reducing the Speed of Slurry Pump Improve the Life of Pump
Another way to improve the life of pump parts is to reduce the speed of the pump. At the same time, the wear of impeller is greatly reduced due to the reduction of both the liquid flow velocity and the concentration of solid particles on the front of blade. However, when Q= const and H= const, because the speed n decreases, the pump specific speed decreases and the pressure chamber wear increases. Therefore, the relative life of all vulnerable parts should be evaluated.
Due to the reduction of rotational speed, the life of impeller is obviously improved. It is reasonable to use the same pump when the pump parameters change correspondingly at different rotational speeds. In this way, the rotational speed should be increased when pumping fine particles and low abrasive solid-liquid mixtures, while the rotational speed should be reduced when pumping strong abrasive solid-liquid mixtures, especially those containing large particles.
In order to reduce the wear volume of the impeller (front cover and auxiliary blades) in the small flow area caused by the strong flow of the flow of the impeller, a special liner suction pipe is adopted to properly increase the impeller inlet flow velocity.
