供给渣浆泵叶轮入口密封的冲洗水，从根本上改变了液体在腔内流动特性及其角速度值。这个角速度值小于wn/2， 冲洗水量越大，角速度下降就越明显。
  液体在腔内圆周速度下降，导致腔内压力增加，而且它越大，供给腔内冲洗水量越大。
  为了防止固体颗粒进入叶轮入口密封和填料密封，即防止密封件磨损，一般供给冲洗水。
  为了保证填料密封可靠的工作，冲洗水量应为泵流量的0. 5%~1%，对于叶轮无副叶片的泵，其压力p>0. 8prgH+p，对于叶轮后盖板具有副叶片的泵，Pn>0. 6prgH十p，(式中，H、p:分别为泵的扬程和泵入口压力)。
  为了保护叶轮入口侧密封件，冲洗水量应为泵流量的4%~6%，其扬程近似等于供给填料密封冲洗水的水头。
  在固液混合物从压水室内溢流时，只有其粒径小于叶轮轮缘和护板(在闭式侧腔时)之间径向间隙的固体颗粒与固液混合物起流入腔内。在从腔内与固液混合物反向溢流到压水室，从压水室内与固液混合物一起带来的那些固体颗粒被带走。因此，相当小的颗粒参与上述溢流引起的磨损过程，固液混合物中这种颗粒越多，磨损强变就越大。
  颗粒渗入腔内(半径方向上)的深度与很多因素有关，其中包括冲洗水量。例如在供给冲洗水量很小时，这从填料密封侧发生，在叶轮后盖板上具有副叶片时，固体颗料深入腔内的长度大约等于R2/3.根据具有副叶片的叶轮试验得到，在很小半径上没有观察到什么磨损，可是在出口半径上磨损很严重。渣浆泵

The flushing water supplied to the impeller inlet seal of slurry pump fundamentally changes the flow characteristics and angular velocity of liquid in the cavity. This angular velocity value is less than wn/2, and the larger the amount of flushing water, the more obvious the decline of angular velocity is.

The lower the circumferential velocity of the liquid in the cavity, the higher the pressure in the cavity, and the larger the amount of flushing water supplied to the cavity.

In order to prevent the solid particles from entering the impeller inlet seal and packing seal, that is to prevent the seal from wearing, the flushing water is generally supplied.

In order to ensure the reliable work of packing seal, the flushing water should be 0.5%~1% of the pump flow. For the pump without auxiliary vanes, the pressure P > 0.8prgH+p. For the pump with auxiliary vanes on the back cover of the impeller, Pn > 0.6prgH10p. (In the type, H, P: respectively, the pump head and pump inlet pressure).

In order to protect the impeller inlet side seals, the flushing water volume should be 4%~6% of the pump flow, and its head is approximately equal to the head of the flushing water supplied to the packing seal.

When the solid-liquid mixture overflows from the pressure chamber, only the solid particles with a diameter smaller than the radial clearance between the impeller rim and the guard plate (in the closed side chamber) and the solid-liquid mixture flow into the chamber. The solid particles brought along with the solid-liquid mixture from the chamber are taken away when the solid-liquid mixture overflows into the pressurized water chamber in the opposite direction. Therefore, relatively small particles participate in the wear process caused by the above-mentioned overflow. The more such particles in the solid-liquid mixture, the greater the wear strength.

The depth of particle infiltration into the cavity (in the direction of radius) is related to many factors, including the amount of flushing water. For example, when the water supply for flushing is very small, it occurs from the sealing side of the packing. When there are secondary blades on the back cover plate of the impeller, the length of solid particles penetrating into the cavity is approximately equal to R2/3. According to the impeller test with secondary blades, no wear is observed on a very small radius, but the wear is very serious on the exit radius.