制动功率及其对渣浆泵特性曲线的影响
一、制动功率

制动功率是叶轮和压水室之间液体交换的结果。在渣浆泵内由于叶轮内存在脱流区，在很大流量范围内，这种交换很重要，不仅在小流量状态而且在最佳状态或者接近最佳状态产生制动功率。
    在平衡试验时，根据下列公式确定制动功率
二、制动功率发生过程
    制动功率发生过程，可以用下列方式描述.
    在单位时间内，参与叶轮和压水室之间交换的液体数量为qt.液体以能量等于qrHk从叶轮流入压水室。在这部分液体与压水室内液体混合时，水头损失等于Hk-Hors (式中，Horn 为压水室内的水头)。这种水头差是压水室内的损失hors.液体携带储备能量等于qt(Hx - horm)返回叶轮。在叶轮内有能量qHr传给液体。式中HT为叶轮理论扬程。

根据$.A.鲍格尼茨卡娅和B. I.格尔瓦诺夫斯基进行的挖泥泵平衡试验分析，可以做出下列结论:
(1）在叶轮和压水室之间交换流量qt越大，液体从计算断面进人压水室的流量就越大，即计算断面的流量Q,.越大。
(2）叶片上没有脱流时; 在叶轮和压水室之间不可能有交换。脱流区越大，即排挤系数越小(只考虑脱流)，交换流量qt就越大。这样，液体在叶轮和压水室之间交换强度与参数(1-%2)有关。

在qt和Q.-Q (1-%;)之间存在线性关系。渣浆泵

Braking Power and Its Effect on Slurry Pump Characteristic Curve

I. Braking power

Braking power is the result of liquid exchange between impeller and water chamber. In slurry pump, because the impeller has a detachment zone, in a large flow range, this exchange is very important, not only in a small flow state, but also in the optimal state or near the optimal state to generate braking power.

In the balance test, the braking power is determined according to the following formulas

2. Braking power generation process

The braking power generation process can be described in the following ways.

In unit time, the quantity of liquid exchanged between impeller and water chamber is qt. The liquid flows from impeller to water chamber with energy equal to qrHk. When this part of the liquid is mixed with the liquid in the pressurized water chamber, the head loss is equal to Hk-Hors (in formula, Horn is the head in the pressurized water chamber). This head difference is the loss of hors in the pressurized water chamber. The liquid carrying reserve energy is equal to QT (Hx - horm) returning to the impeller. In the impeller, energy qHr is transmitted to the liquid. HT is the theoretical head of impeller.

Based on the analysis of dredging pump balance tests conducted by $.A. Baughnitskaya and B. I. Gervanovsky, the following conclusions can be drawn:

(1) The larger the exchange flow QT between impeller and water chamber, the larger the flow of liquid from the calculated section into the water chamber, that is, the larger the flow Q of the calculated section.

(2) There is no exchange between the impeller and the water chamber when there is no bleeding on the blade. The larger the stripping zone, the smaller the extrusion coefficient (only considering the stripping), the larger the exchange flow qt. In this way, the exchange strength of liquid between impeller and water chamber is related to the parameter (1-%2).

There is a linear relationship between QT and Q. -Q (1-%). Slurry pump