潜水渣浆泵电泵与卧式渣浆泵的优势

如图2 - 19所示，潜水电泵也是用来把深井中的水提到地面上，只是把电机和泵连在一起放于井下 水中去了，直接由电机带动泵的叶轮旋转。省去了泵座、扬水管、中间传动轴、联轴器等，大大简化了泵的结构。但由于要把电机放入井下水中运行，所以对电机绕组绝缘要采取特殊措施。目前，潜水电机大多采用湿式的。但当电机一旦产生故障修理是比较困难的。
    图2-20所示是作业面潜水泵，它也是泵和电机置于水下工作，但不受井径的限制需要细长，并且置于水下很浅。这种泵的电机一般是干式的，有干式和充油式两种。这种泵安装方便，启动前也不需要灌水，使用极其方便。所以常在野外，移动使用的工地中使用。它的流量、扬程、功率一般都较小。
九、屏蔽泵
    如图2-21所示，屏蔽泵又称无轴封泵；泵的叶轮和电机转子连成一体，电机的转子和定子用薄壁圆筒封闭起来，使电机绕组与被输送的液体隔开，并装在一个密封壳体内，故不需要轴封，从根本上消除了被输送液体的外漏。所以常用来输送易燃易爆、有放射性、有毒或贵重的液体。

十、自吸泵

如图2-22所示，自吸系有内循环和外循环两种利式。图2-22为内循环式的自吸泵，它们都带有气水分离室，泵体较大。泵在启动前先往系内灌满液体，启动后由于叶轮旋转，在离心力的作用下液体被甩出流道到泵体中，此时，叶轮进口处形成真空，吸入管路内的空气进入泵进口与水混合后，形成气水混合物进入叶轮内。然后，在离心力的作用下又被甩到泵体内，由于泵体较大，流速减慢，进行气水分离。气体向上由液面逸出，液体在静压力作用下，从泵体下方的喷嘴射出，回流到泵进口，又与吸入管内的空气混合，进入叶轮内。这样周而复始，不断将泵进水管路内的空气排出，液面不断上升，直至吸入管内的空气全部排净，液体进入叶轮，完成自吸过程，泵正常排液。
    如图2 23 所示 为外循环自吸泵， 它与内循环式自吸泵不同的是液体回流不在叶轮进口，而在叶轮出口处与空气混合，再排出到泵体进行气水分离，气体从液面逸出，液体又回流到叶轮出口外圆，进行气水混合，直到排尽进口管路中的空气。 渣浆泵厂家

Advantages of electric pump and horizontal slurry pump of submersible slurry pump

As shown in Figure 2-19, the submersible pump is also used to lift the water in the deep well to the ground, but only to connect the motor and the pump together and put them in the well water. The motor directly drives the impeller of the pump to rotate. The pump base, lifting pipe, intermediate transmission shaft and coupling are omitted, which greatly simplifies the structure of the pump. However, due to the need to put the motor into the well water for operation, special measures should be taken for the motor winding insulation. At present, most of the submersible motors are wet type. But it is difficult to repair the motor once it breaks down.

Figure 2-20 shows the submersible pump on the working surface, which is also the pump and motor working under water, but it needs to be long and thin without the limitation of well diameter, and it is very shallow under water. The motor of this kind of pump is generally dry type, including dry type and oil filled type. This kind of pump is easy to install, no need to fill water before starting, so it is very convenient to use. So it is often used in the field and mobile construction site. Its flow, head and power are generally small.

IX. shield pump

As shown in Figure 2-21, the shield pump is also known as the shaftless pump; the impeller of the pump and the rotor of the motor are integrated, and the rotor and stator of the motor are sealed with thin-walled cylinders, so that the motor winding is separated from the delivered liquid, and installed in a sealed shell, so no shaft seal is required, fundamentally eliminating the leakage of the delivered liquid. Therefore, it is often used to transport flammable, explosive, radioactive, toxic or valuable liquids.

X. self priming pump

As shown in Figure 2-22, the self-priming system has two advantages: internal circulation and external circulation. Figure 2-22 shows the self-priming pump of internal circulation type, both of which are equipped with gas-water separation chamber, and the pump body is large. Before starting the pump, fill the system with liquid first. After starting, due to the rotation of the impeller, the liquid is thrown out of the flow channel into the pump body under the action of centrifugal force. At this time, a vacuum is formed at the impeller inlet. After the air in the suction pipeline enters the pump inlet and mixes with water, the air-water mixture is formed and enters the impeller. Then, it is thrown into the pump body under the action of centrifugal force. Because the pump body is large, the flow rate slows down, and gas-water separation is carried out. The gas escapes from the liquid surface. Under the static pressure, the liquid shoots out from the nozzle under the pump body, flows back to the inlet of the pump, and mixes with the air in the suction pipe to enter the impeller. In this way, the air in the water inlet pipe of the pump is continuously discharged and the liquid level is continuously rising until the air in the suction pipe is completely discharged and the liquid enters the impeller to complete the self-priming process and the pump is discharged normally.

As shown in Figure 223, the external circulation self-priming pump is different from the internal circulation self-priming pump in that the liquid reflux is not at the impeller inlet, but is mixed with air at the impeller outlet, and then discharged to the pump body for air-water separation. The gas escapes from the liquid surface, and the liquid flows back to the outer circle of the impeller outlet for air-water mixing until the air in the inlet pipeline is exhausted Slurry pump manufacturer