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水利工程泵@灤南縣水利工程泵@水利工程泵200S95

故效率總是小于1的。目前國內中開泵中多數型號的效率一般在70-80％左右，少數大流量型號的效率在90%左右。影響中開泵效率的主要原因在于泵內存在的能量損失，這些損失主要是機械損失，水力損失和容積損失。機械損失主要是葉輪外表面與液體的磨擦損失（即圓盤摩擦損失）以及離心泵軸承，軸封上的摩擦損失，水力損失主要是液體在泵內運動速度和方向的變化引起的沖擊損失。中開泵效率是指泵的有效功率和軸功率的比值旋渦損失等，液體與泵內各流道壁面的磨擦損失以及液體運動的內部磨擦損失，容積損失主要是泵內高壓液體向低壓區(qū)泄露回流造成的損失，包括密封環(huán)泄漏損失，平衡機構泄漏損失和級間泄漏損失。通過不同可以使中開泵的效率和汽蝕性能得到很好的提升當然在進行效率和汽蝕性能改造的同時。

本系列泵是單級、雙吸、水平中開式離心泵，適用于汲送清水和無腐蝕性的液體。介質溫度80℃。軸承體通人冷卻水后，可輸送130℃以下的熱水。改變密封環(huán)、軸套和葉輪的材質，可以輸送含有泥沙的渾水。改變承壓零件的材質，可以提高泵的進口壓力.泵的軸封一般采用軟填料密封，如有特殊要求，也可改裝機械密封。從電機方向看泵，泵為逆時針旋轉，按用戶要求，也可改為順時針旋轉。jdhuiquan4.13

水利工程泵@灤南縣水利工程泵@水利工程泵200S95

In order to achieve the purpose of sealing, while the dynamic ring and static ring has a lubrication effect. The medium-open pump is regularly inspected during operation. The characteristics of the use of mechanical seals in medium-open pumps 1, the main advantage of the mechanical seal of the medium open pump is that the seal is reliable in a long life cycle, the leakage is very few, the effect is long, generally can use about 5 years, the maintenance cycle is long. However, the mechanical seal structure is complex, the manufacturing and installation precision is high, the lattice is high, the technical request to the maintenance personnel is high. Therefore, it is very important to ensure the reliable operation of mechanical seals and extend the service life of mechanical seals. Of course, the price sealed with seasoning is cheap, the technical requirements are relatively low. The problem that the mechanical seal of medium open pump is easy to occur in the process of use, the main problem that the mechanical seal is easy to occur is the leakage amount is very poor and the temperature is too high. Touch the mechanical seal cover with your hand, and if you can't stay on it, it means the temperature is too high. Leakage per side should not exceed 60 drops of/min, if linear flow, it indicates that the amount of leakage is too large, can determine whether to observe the operation;

根據水泵行業(yè)規(guī)定，Sh型與S型兩大系列中開泵并存，直至統(tǒng)一設計出新型泵代替這兩個系列時為止。本產品主要用于工廠、礦山、城市、電站給水農用排澇灌溉、各種水利工程用泵和采暖空調系統(tǒng)等場合

[二]性能范圍：
流量Q112m3/h-6460m3/h,揚程H9m-140m，允許進口壓力≤0.3Mpa(用戶在訂貨時須標明進口壓力值)。