渣浆泵的结构、分类及性能参数
一、离心泵的结构
    典型离心泵的结构如图1-1所示。离心泵主要由吸入室、叶轮、排出室(蜗壳)、轴、密封填料、轴向力平衡装置和支座等构成。

离心泵的过流部件包括吸入室、叶轮及排出室(蜗壳)。

1. 吸入室

吸入室位于叶轮进口前,其作用是把液体从吸入管引入叶轮，要求液体流过吸入室时流动损失较小.并使液体流入叶轮时速度分布较均匀。
2.叶轮

叶轮是离心泵的唯一做功部件，液体从叶轮中获得能量。对叶轮的要求是在流动损失最小的情况下使单位质量液体获得较高的能头。
3.排出室

排出室常用的结构是由螺旋室加扩压管所组成的蜗壳，位于叶轮出口之后,其作用是把从叶轮内流出来的液体收集起来并送入下一级叶轮入口或送入排出管。更重要的作用是由于液渣浆泵

体流出叶轮时速度很大，为了减小后面管路或泵中的流动损失，利用蜗壳的扩压管或多级泵常用的导叶中扩压流道把速度能转换为压力能，提高泵的效率。

Structure, classification and performance parameters of slurry pump

1、 Structure of centrifugal pump

The structure of a typical centrifugal pump is shown in Figure 1-1. Centrifugal pump is mainly composed of suction chamber, impeller, discharge chamber (volute), shaft, sealing packing, axial force balancing device and support.

The overflow parts of centrifugal pump include suction chamber, impeller and discharge chamber (volute).

1. inhalation room

The suction chamber is located in front of the impeller inlet. Its function is to introduce the liquid from the suction pipe to the impeller. It requires that the flow loss of the liquid passing through the suction chamber is small and the velocity distribution of the liquid flowing into the impeller is relatively uniform.

2. impeller

Impeller is the only working part of centrifugal pump, and liquid obtains energy from impeller. The requirement of impeller is to make the unit mass liquid obtain higher energy head under the condition of minimum flow loss.

3. discharge chamber

The common structure of the discharge chamber is a volute composed of a spiral chamber and a diffuser, which is located behind the impeller outlet. Its function is to collect the liquid flowing from the impeller and send it to the inlet of the next impeller or into the discharge pipe. The more important role is due to the slurry pump

In order to reduce the flow loss in the pipeline or pump, the speed energy is converted into pressure energy by the diffuser of volute or the diffuser channel in the guide vane commonly used in multistage pump to improve the efficiency of pump.