渣浆泵的串联怎么工作
一、使用场合
    泵的串联工作就是将第一台泵的出口与第一台泵的入口相连接，以增加扬程。常用于以下场合:
    (1)单台泵的扬程不能满足装置压力的需要时;

(2)同时要增加流量和压力;

(3) 管路长距离输送;

(4)改善后面一台泵的汽蚀性能。

二、两台同性能泵串联工作

图4-2所示为相同性能泵串联工作的运行曲线图，曲线I、II为两台泵的性能曲线，曲线I+II为串联工作时的性能曲线，它是将单独泵的性能曲线在同一流量下把杨程迭加起来得到的。与装置扬程特性曲线III相交于M点，M点即为串联工作时的工作点。此时流量为Qm，扬程为Hm。
    串联后每台泵的运行工况点可以从M点作纵坐标的平行线交曲线I、II于B点，即为串联后的每台泵工作点。在B点的流量为Q1 =QII，扬程为H ,Hm。显然串联工作的特点是流量彼此相等，即Qm = Q1=Qm,总扬程为每台扬程的总和，即HM = Hq +Hm。
    串联前每台泵的工作点为C点( Qc、He、Pc、ηc )，与串联后的工作点B点参数相比较:
                           QM = Q1=QII> Qc
                             Hc<Hm<2Hc

(4)由于外界负荷变化很大，需要用泵的台数来进行调节;

(5)减小备用泵的容量。

二、两台同性能泵并联工作

图4-4为两台同性能泵的并联工作时的性能曲线。图中曲线I、II为两台同性能泵的性能曲线，并联工作时的性能曲线为I+II，III为装置扬程特性曲线。
    并联工作曲线I+II的画法是将泵单独的性能曲线在扬程相等的条件下把流量迭加而成，它与装置扬程特性曲线皿相交于M点，即为并联工作时的工作点，此时流量为Qm，扬程为HM。
    确定单个泵的工况，可由M点作横坐标的平行线与单台泵性能曲线交于B点，即为每台泵并联工作时的单独工作点，此时B点流量Qg=Q1 =Qπ，B点的扬程Hn=Hq =Hye并联工作的特点是:两台泵的扬程相等，即Hx=Hp=Hq =Hπ,总流量为两台泵之和，即Qx=Qr +Qn =2Qb  

未并联前每台泵单独工作时的工作点为C (Qe、H、Pc、7。)，并联后每台泵的工作点(Q、H。、Pr、7n).比较并联前每台泵的参数和并联后每台泵的参数，可以看出:
                               Qb<Qc<QM<2Qc  
                                 Qm = 2Qb

Hb=Hm> Hc

这说明两台泵并联工作时的流量Qm等于并联运行时各台泵的流量之和，和并联前一台泵单独工作时相比，两台泵并联后的总流量QM小于一台泵单独工作时流量的2倍，而大于一台泵单独工作时的流量Qc。并联后单台泵工作的流量Qu比并联前单台泵工作的流量Qc小，而扬程比并联前单台泵工作时高些，这是因为管道摩擦损失随流量的增加而增大了，就需要提高泵的扬程来克服增加的损失，故Hb> Hc，因而流量就相应减少了。  渣浆泵厂家

How to operate the slurry pump in series

I. use occasion

The series work of the pump is to connect the outlet of the first pump with the inlet of the first pump to increase the lift. Commonly used in the following situations:

(1) when the head of a single pump cannot meet the pressure requirements of the device;

(2) increase flow and pressure at the same time;

(3) long distance pipeline transportation;

(4) improve the cavitation performance of the latter pump.

Two pumps of the same energy operate in series

Figure 4-2 shows the operation curve of the same performance pump in series, curve I and curve II are the performance curves of two pumps, curve I + curve II are the performance curves of the two pumps in series, it is obtained by superposing the performance curves of individual pumps under the same flow. It intersects with the head characteristic curve III of the device at point m, which is the working point in series operation. At this time, the flow is QM and the lift is HM.

After series connection, the operating point of each pump can be from point m as the vertical coordinate of the parallel line intersection curve I and II to point B, that is, the operating point of each pump after series connection. The flow at point B is Q1 = QII, and the lift is h, HM. Obviously, the characteristic of series operation is that the flow is equal to each other, that is, QM = Q1 = QM, and the total head is the sum of each head, that is, HM = HQ + HM.

The working point of each pump before series connection is point C (QC, he, PC, η C), compared with the parameter of point B after series connection:

QM = Q1=QII> Qc

Hc<Hm<2Hc

(4) due to the great change of external load, the number of pumps shall be used for adjustment;

(5) reduce the capacity of standby pump.

Two pumps of the same energy operate in parallel

Figure 4-4 shows the performance curve of two pumps in parallel. The curves I and II in the figure are the performance curves of two same-sex energy pumps. The performance curves of parallel operation are I + II and III are the head characteristic curves of the device.

The drawing method of parallel working curve I + II is that the flow is superposed by the separate performance curve of the pump under the condition that the head is equal. It intersects with the head characteristic curve plate of the device at point m, that is, the working point in parallel working, at this time, the flow is QM and the head is HM.

To determine the working condition of a single pump, the parallel line with the abscissa of point m and the performance curve of a single pump can be intersected at point B, that is, the single working point of each pump in parallel operation. At this time, the flow of point B QG = Q1 = q π, and the lift of point B HN = HQ = hye in parallel operation are characterized by: the lift of two pumps is equal, that is, HX = HP = HQ = h π, and the total flow is the sum of two pumps, that is, QX = QR + QN = 2qb

Before parallel connection, the working point of each pump is C (QE, h, PC, 7). ）, working points (Q, H) of each pump after parallel connection. , PR, 7n). Comparing the parameters of each pump before and after parallel connection, we can see that:

Qb<Qc<QM<2Qc

Qm = 2Qb

Hb=Hm> Hc

This shows that the flow QM of two pumps in parallel operation is equal to the sum of the flow of each pump in parallel operation. Compared with the previous pump in parallel operation, the total flow QM of two pumps in parallel operation is less than 2 times of the flow of one pump in separate operation, and greater than the flow QC of one pump in separate operation. After parallel connection, the flow Qu of single pump is smaller than that of single pump before parallel connection, while the lift is higher than that of single pump before parallel connection. This is because the friction loss of pipeline increases with the increase of flow, so it is necessary to increase the lift of pump to overcome the increased loss, so HB > HC, so the flow is correspondingly reduced Slurry pump manufacturer