渣浆泵主要需要什么性能参数

表示泵工作性能的参数叫做泵的性能参数，常有流量Q,扬程H，转速n，功率P，效率η，汽蚀余量(NPSH) 或允许吸上真空高度[H,] 等。
一、流量Q

泵在单位时间内排出液体的数量，有体积流量Q和重量流量Qc两种：

体积流量Q的单位: m3/h; m3/s; L/s等。

重量流量Qc的单位: tVh; kgf/s。

重量流量Qc和体积流量Q的关系为:

二、扬程H

单位重量液体通过泵后能量的增加值，即等于泵的出口总水头与入口总水头的代数差。单位为米水柱(mH20)。

功率P

泵的功率包括有效功率Pu (或称输出功率)，轴功率P (或称输入功率)，配用功率Pg三种。
1.泵的有效功率P。(输出功率)
    是单位时间内对流经该泵流体所做的功，称有效功率Pu或称输出功率、水功率。
                       Pu=pgQvH/1000
式中  Pu----泵的有效功率， kW;
      Qv----泵的体积流量， m3/s;

H----泵的总扬程，m;

p----被输送液体的密度，kg/m3;。

2.轴功率P (输入功率)

是指原动机输给泵轴的功率，称轴功率P或称输入功率。

泵的输入功率和输出功率之差即为泵内的损失部分，之比为泵的效率η。

                     P=Pu/η= pgQvH/1000η

式中η泵的效率 ,%。

3.配用功率Pg

是指原动机额定输出功率。考虑到泵在非设计工况下运行时轴功率增大或泵在长时间运行后效率下降或其他故障时轴功率增大等因素，所以配用功率比轴功率要大一些，需有一个储备系数k。    
                          Pg=kP

式中  k----储备系数

储视功率的大小采用不同的储备系数，见图2-28.

五、泵效率η

泵的有效功率Pu与轴功率P之比，用百分数表示：

                   Η=Pu/P*100%  渣浆泵厂家

What are the main performance parameters of slurry pump

The parameters indicating the working performance of the pump are called the performance parameters of the pump, including flow Q, head h, rotating speed n, power P, efficiency η, NPSH or the allowable vacuum height [h,], etc.

I. flow Q

The quantity of liquid discharged by the pump in unit time includes volume flow Q and weight flow QC:

Unit of volume flow Q: m3 / h; m3 / S; L / s, etc.

Unit of weight flow QC: TVH; kgf / s.

The relationship between weight flow QC and volume flow Q is as follows:

II. Lift H

The increment of energy after the unit weight liquid passes through the pump is equal to the algebraic difference between the total head at the outlet and the total head at the inlet of the pump. The unit is m water column (mh20).

Power P

The power of the pump includes effective power Pu (or output power), shaft power P (or input power) and power PG.

1. Effective power P of pump. (output power)

It is the work done to the fluid flowing through the pump in unit time, which is called effective power Pu or output power and water power.

Pu=pgQvH/1000

Where Pu is the effective power of pump, kW;

QV ---- volume flow of pump, m3 / S;

H ---- total head of pump, m;

P ---- density of delivered liquid, kg / m3;.

2. Shaft power P (input power)

It refers to the power transmitted by the prime mover to the pump shaft, which is called shaft power P or input power.

The difference between the input power and output power of the pump is the loss part in the pump, and the ratio is the efficiency η of the pump.

P=Pu/η= pgQvH/1000η

Where, the efficiency of η pump,%.

3. Power PG

It refers to the rated output power of prime mover. In consideration of the factors such as the increase of shaft power when the pump is running under non design conditions, the decrease of pump efficiency after a long time of operation or the increase of shaft power when other faults occur, the matching power is larger than the shaft power, and a reserve coefficient K is required.

Pg=kP

Where k --- reserve coefficient

Different reserve coefficients are used for the storage of apparent power, as shown in Figure 2-28

V. pump efficiency η

The ratio of the effective power Pu of the pump to the shaft power P, expressed as a percentage:

Η = PU / P * 100% slurry pump manufacturer