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渣漿泵的功率和效率

1. 機械效率

離心泵的機械效率是指水力功率Ph與軸功率P之比，用來衡量機械損失功率△Pm的大小,用7來表示:
2.容積效率
    離心泵的容積效率是指實際流量Q與理論流量Qt之比,用來衡量離心泵流量損失的大

小，用η來表示:

ηv=Q/QT=1-q/Qt
3.水力功率和水力效率
    離心泵的水力功率是指單位時間內葉輪給出的能量,用Ph來表示:
                         Ph= pgQrHr
式中Ht----理論揚程 ,m;
     Qt----理論流量，指不考慮流量損失時的流量,m2/s。

離心泵的水力效率是指有效揚程H與理論揚程Ht之比，用來衡量流動損失的大小，用ηh來表示:
                            ηh=H/HT
4.軸功率和總效率
    軸功率與以上各種功率之間的關系為: 渣漿泵廠家
    式(1-43)說明，泵的總效率η等于容積效率ηv，水力效率ηh和機械效率ηm三者的乘積。要提高泵的效率，就必須從設計、制造和運行等諸方面考慮、減少各種損失。一般離心泵各種效率的參考值列于表1-3中。

Power and efficiency of slurry pump

1. Mechanical efficiency

The mechanical efficiency of centrifugal pump refers to the ratio of hydraulic power pH to shaft power P, which is used to measure the magnitude of mechanical loss power △ PM, expressed by 7:

2. Volumetric efficiency

The volume efficiency of centrifugal pump refers to the ratio of actual flow Q to theoretical flow QT, which is used to measure the large flow loss of centrifugal pump

Small, denoted by η:

ηv=Q/QT=1-q/Qt

3. Hydraulic power and efficiency

The hydraulic power of centrifugal pump refers to the energy given by impeller in unit time, which is expressed in pH:

Ph= pgQrHr

Where HT - Theoretical lift, m;

QT - theoretical flow, refers to the flow without considering the flow loss, m2 / s.

The hydraulic efficiency of centrifugal pump refers to the ratio of effective head h to theoretical head HT, which is used to measure the flow loss, expressed by η H:

ETA h=H/HT

4. Shaft power and total efficiency

The relationship between shaft power and above power is: slurry pump manufacturer

Formula (1-43) shows that the total efficiency η of the pump is equal to the product of volumetric efficiency η V, hydraulic efficiency η h and mechanical efficiency η M. In order to improve the efficiency of the pump, we must consider and reduce all kinds of losses from the aspects of design, manufacture and operation. The reference values of various efficiency of general centrifugal pump are listed in table 1-3.