自吸泵与离心泵有哪些区别？
很多用户都不知道自吸泵和离心泵的区别。其实自吸泵也是离心泵的一种。它是一种泵体高度高、有一定蓄水能力的离心泵，在第一次灌水后，将底阀安装在吸水管内即可吸水。所以自吸泵也可以叫离心泵。自吸泵和离心泵的主要区别在于，上海钛龙自吸泵的进水管在第一次充水后可以吸水，不需要安装底阀，以后也不需要加水。泵体比离心泵大，很多都有存水和自吸终身的功能，而离心泵起增压的作用，液位必须比泵高，所以只有流入泵体后才能启动。如果液位低于离心泵的液位，只能通过在进口管道的吸入口安装底阀向泵和管道内充入液体，或者在进口安装导水筒，如泵长时间不工作的离心泵，才能实现自吸功能， 当泵第二次启动时，入口管道和泵体中的水基本上没有了，需要再次注水，操作起来很麻烦，因为长期不使用的离心泵入口处的底阀密封不能达到完全密封的效果，液体会慢慢漏回池中，所以在自吸功能的工作条件下，WATERSUNNY自吸离心泵都采用轴向回液的泵体结构。 离心泵的泵体由吸入室、储液室、涡旋室、回液孔、气液分离室等组成。离心泵正常启动后，叶轮将吸入室中储存的液体和吸入管中的空气一起吸入，在叶轮中完全混合。在离心力的作用下，液体夹带气体向涡室外缘流动，在叶轮外缘形成一定厚度的白色泡沫带和高速旋转的液环。气液混合物通过扩散管进入气体分离室。此时，由于流速突然降低，较轻的气体从混合液体中分离出来，气体继续上升，并通过泵体的排出口排出。脱气后的液体返回储液室，通过回流孔再次进入叶轮，与从叶轮内部吸入管吸入的气体再次混合，在高速旋转的叶轮作用下流向叶轮外缘。随着这个过程的不断进行，吸入管道中的空气不断减少，直到空气排出，自吸泵完成自吸过程，离心泵投入正常运行。由于离心泵具有这种独特的排气能力，自吸泵无需安装底阀即可输送含气液体，在游轮上使用时具有良好的扫舱功能。1.一些离心泵的轴承体底部有冷却室。当轴承的温度由于轴承的加热而上升到70℃以上时，冷却室可以充满冷却液管接头，如冷却液循环冷却，如VAREM的IH化学泵。ZILMET离心泵中防止液体从高压区泄漏到低压区的密封机构是前后密封圈，前密封圈安装在泵体上，后密封圈安装在轴承体上。当泵长期运行后磨损到一定程度，影响泵的效率和自吸性能时，应更换。当叶轮高速旋转时，叶轮带动叶片之间的液体一起旋转。由于离心力的作用，液体从叶轮中心抛向叶轮外缘(流速可提高到15 ~ 25m/s)，动能也随之增加。当液体进入泵壳时，由于蜗壳形泵壳内的流道逐渐膨胀，液体的流速逐渐减小，一部分动能转化为静压能，于是液体以较高的压力沿出口流出。同时，由于液体被甩出，在叶轮中心形成一定的真空，液面压力Pa高于叶轮中心，因此吸入管道的液体在压差的作用下进入泵内。叶轮不断旋转，液体不断被吸出并压出。离心泵之所以叫离心泵，是因为它主要靠离心力来输送液体。
What are the differences between self-priming pump and centrifugal pump?
Many users do not know the difference between self-priming pump and centrifugal pump. In fact, self-priming pump is also a centrifugal pump. It is a centrifugal pump with high body height and certain water storage capacity. After the first irrigation, the bottom valve can be installed in the water absorption pipe to absorb water. So self priming pump can also be called centrifugal pump. The main difference between self-priming pump and centrifugal pump is that the water inlet pipe of Shanghai titanon self-priming pump can absorb water after the first water filling, and it does not need to install the bottom valve, and no water is needed later. The pump body is larger than the centrifugal pump, many of which have the function of water storage and self-priming for life. However, centrifugal pump plays a role of boosting. The liquid level must be higher than that of the pump, so it can only be started after it enters the pump body. If the liquid level is lower than the level of centrifugal pump, the self-priming function can only be achieved by installing the bottom valve at the suction port of the inlet pipe to fill the pump and the pipeline with liquid, or installing the water guide tube at the inlet, such as the centrifugal pump which does not work for a long time, When the pump is started for the second time, the water in the inlet pipe and pump body is basically absent, so it needs to be refilled. It is very difficult to operate. Because the bottom valve seal at the inlet of the centrifugal pump that is not used for a long time can not achieve the complete sealing effect, and the liquid will slowly leak back into the pool. Therefore, under the working condition of self-priming function, the water self-priming centrifugal pump adopts the pump body structure of axial return liquid . The pump body of centrifugal pump consists of suction chamber, liquid storage room, vortex chamber, return hole, gas-liquid separation chamber, etc. After the centrifugal pump is started normally, the impeller will suck the liquid stored in the suction chamber and the air in the suction pipe together, and mix it completely in the impeller. Under the action of centrifugal force, the liquid entrainment gas flows to the outer edge of the vortex chamber, forming a thick white foam belt and a high-speed rotating liquid ring at the outer edge of the impeller. The gas-liquid mixture enters the gas separation chamber through the diffusion tube. At this time, due to the sudden decrease of flow rate, the lighter gas is separated from the mixed liquid, and the gas continues to rise and is discharged through the discharge port of the pump body. The degasified liquid returns to the liquid storage chamber, and enters the impeller again through the return hole, and then mixes with the gas inhaled from the inner suction pipe of the impeller, and flows to the outer edge of the impeller under the action of the impeller with high speed rotation. With the continuous progress of this process, the air in the suction pipe is decreasing until the air is discharged. The self-priming pump completes the self-priming process, and the centrifugal pump is put into normal operation. Because of the unique exhaust capacity of centrifugal pump, the self-priming pump can deliver the gas containing liquid without the installation of bottom valve, and has good function of cabin cleaning when used on cruise ship. 1. cooling chamber is provided at the bottom of bearing body of some centrifugal pumps. When the temperature of the bearing rises above 70 ℃ due to the heating of the bearing, the cooling chamber can be filled with coolant pipe joints, such as the coolant circulating cooling, such as the IH chemical pump of varem. The sealing mechanism of zilmet centrifugal pump to prevent liquid leakage from high pressure area to low pressure area is front and rear sealing ring, front sealing ring is installed on pump body and rear sealing ring is installed on bearing body. When the WaterSunny pump is worn to a certain extent after long-term operation, which affects the efficiency and self-absorption performance of the pump, it should be replaced. When the impeller rotates at high speed, the impeller drives the liquid between the blades to rotate together. Due to the centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller (the flow rate can be increased to 15 ~ 25m/s), and the kinetic energy increases. When the liquid enters the pump shell, the flow velocity of the liquid decreases gradually because the flow passage in the volute type pump shell expands gradually, and a part of the kinetic energy is converted to static pressure energy, so the liquid flows out along the outlet with high pressure. At the same time, because the liquid is dumped, a certain vacuum is formed in the center of the impeller, and the liquid level pressure PA is higher than the impeller center, so the liquid in the suction pipe enters the pump under the action of pressure difference. The impeller is rotating, and the liquid is constantly sucked out and pressed out. Centrifugal pump is called centrifugal pump because it mainly relies on centrifugal force to transport liquid.