自吸泵吸不上水的原因（水泵吸不上水的原因）

　　自吸泵是在农业、工业和日常生活中应用广泛!在日常使用中，很多人会碰到自吸泵吸不上水的情况，今天，PROUMB中国版一起来探讨下怎样解决自吸泵洗不出水时可能存在的原因与解决方法!以便帮助各位解决此问题!

　　一、进水管和泵体内有空气

　　1.水泵启动前未灌满足够的水，有时看上去灌的水已从放气孔溢出，但未转动泵轴交空气完全排出，致使少许空气残留在进水管或泵体中。

　　2.与水泵接触的进水管的水平段逆水流方向应用0.5%以上的下降坡度，连接水泵进口的一端为，不要完全水平。如果向上翘起，进水管内会存留空气，降低了水管和水泵中的真空度，影响吸水。

　　3.水泵的填料因长期使用已经磨损或填料压得过松，造成大量的水从填料与泵轴轴套的间隙中喷出，其结果是外部的空气就从这些间隙进入水泵的内部，影响了提水。

　　4.进水管因长期潜在水下，管壁腐蚀出现孔洞，水泵工作后水面不断下降，当这些孔洞露出水面后，空气就从孔洞进入民进水管。

　　5.进水管弯管处出现裂痕，进水管与水泵连接处出现微小的间隙，都有可能使空气进入进水管。

　　二、水泵转速过低

　　1.人为的因素。有部分用户因原配电机损坏，就随意配上另一台电动机带动，结果造成了流量小、扬程低甚至不上水的后果。

　　2.水泵本身的机械故障。叶轮与泵轴紧固螺母松脱或泵轴变形弯曲，造成叶轮多移，直接与泵体磨擦，或轴承损坏，都有可能降低水泵的转速。

　　3.动力机维修不灵。电动机因绕组烧毁，而失磁，维修中绕组匝数、线径、接线方法的改变，或维修中故障未彻底排除因素也会使水泵转速改变。

　　三、吸程太大

　　有些水源较深，有些水源的外围地势较平坦处，而忽略了水泵的容许吸程，因而产生了吸水少或根本吸不上水的结果。要知道水泵吸水口处能建立的真空度是有限度的，真空的吸程约为10米水柱高，而水泵不可能建立的真空。而且真空度过大，易使泵内的水气化，对水泵工作不利。所以各离心泵都有其容许吸程，一般在3-8.5米之间。安装水泵时切不可只图方便简单。

　　四、水流的进出水管中的阻力损失过大

　　有些用户经过测量，虽然蓄水池或水塔到水源水面的垂直距离还略小于水泵扬程，但还是提水量小或提不上水。其原因常是管路太长、水管弯道多，水流在管路中阻力损失过大。其原因常是管路太长、水管弯道多，水流在管路中阻力损失过大。一般情况下90度弯管比120度弯管阻力大，每一90度弯管扬程损失约0.5-1米，每20米管路的阻力可使扬程损失约1米。此外，有部分用户还随意水泵进、出管的管径，这些对扬程也有一定的影响。

　　五、其它因素的影响

　　(1)底阀打不开。通常是由于水泵搁置时间太长，底阀垫圈被粘死，无垫圈的底阀可能会锈死。

　　(2)底阀滤器网被堵塞;或底阀潜在水中污泥层中造成滤网堵塞。

　　(3)叶轮磨损严重。叶轮叶片经长期使用而磨损，影响了水泵性能。

　　(4)闸阀可止回阀有故障或堵塞会造成流量减小甚至抽不上水。

　　(5)出口管路的泄漏也会影响提水量。

　　自吸水泵不上水的原因与解决方法如下：

　　1、电压过低：调整电压

　　2、吸程过高或吸入管路太长：降低吸程或缩短管路

　　3、机械密封泄漏过大：修理或更换

　　4、泵体里面或者进口管道滤网遭杂物石头堵塞：检查清理掉堵塞物

　　5、自吸泵泵体内未加储液或储液不足：加足

　　自吸泵怎么吸不出来水：自吸泵吸不上水的原因

　　1、常用的自吸泵产品都需要**次使用前把泵里面灌满液体才能使用。

　　有的用户没有加水、或者加水太少都有可能是自吸泵吸不上水的原因，所以应该加满液体再启动泵。

　　2、吸入管路漏气：消除管路漏气现象，在允许吸程范围内检查方法泵启动4-5分钟水还未吸上来。请用耳朵贴近进口管道疑是漏气的地方听有无吸气的声音。

　　或者在疑是漏气的地方涂层白乳胶等方法进行修补。

　　3、由于电压过低未达到有效电压促使自吸泵未正常运行，调整电压即可。

　　4、吸程过高或吸入管路太长：降低吸程或缩短管路，更换吸程更大的自吸泵例如：高吸程自吸泵。

　　5、机械密封漏水也会导致自吸泵吸不上水因为机械密封漏水自吸泵也会影响自吸泵的自吸能力。出现这种情况更换新的机械密封即可。

　　6、泵体里面或者进口管道滤网遭杂物石头堵塞：检查清理掉堵塞物。

　　7、叶轮损坏或者磨损：更换新叶轮。

　　8、出口管路安装不正确弯头太多：管路成N字型的管路太多建议在**点安装自动排气阀。

　　9、三相电机接线接反：互换其中两相。

　　10、自吸泵回流孔遭堵塞导致汽水无法分离：检查清理掉。

　　11、有的用户在安装过程中由于现场环境等原因导致进口管道弯头数量太多，这样也会是自吸泵吸不上水的原因。

　　一般情况下自吸泵厂家建议自吸泵进口弯头控制在1-2个以内为宜，*多3个，弯头太多会损耗自吸泵的吸程。

　　12、由于所自吸的液体比重太大也会是自吸泵吸不上水的原因之一。

　　自吸泵嗡嗡响不上水原因及解决方法相关延伸阅读：自吸泵水流量小没劲

　　在给自吸泵进行维修的过程中，如果自吸泵的水流量较小，不仅会影响到自吸的能力，而且很容易在压力的作用之下，造成发动机的温度过高从而诱发短路等一系列问题的发生。针对于这样的故障问题，PROUMB中国版应该选择哪些方法来进行处理呢?下面请跟着小编一起来看看吧。自吸泵不上水的原因及处理方法!

　　**、检查叶轮的缝隙：

　　在自吸泵使用时间过长之后，很容易出现叶轮松动造成叶轮和机器本身的缝隙过大，这样一来不仅会影响到自吸泵本身的水流量，同时也会造成机器填料受到损伤的情况发生。面对这些状况的出现，厂家建议大家**能够更换自吸泵本身的外壳，或者是将叶轮的口环进行更好地调整，才是帮助自吸效果取得顺畅进行的关键所在。在平时的使用期间应用此方法前来帮忙，在确保机器本身的自吸效果上取得了相应的进步和完善。

　　第二、更换叶轮的管路：

　　有些时候水流管路在长时间没有得到有效的清理之后，会出现被脏东西堵住的可能，通过这样的方法进行选择，很容易造成自吸能力变差的风险。所以定期地对管路的内壁进行清理，另外如果发现储存物过多，需要及时地将管路做到更换处理，才能确保出水效果获得**。

　　在解决了关于自吸泵水流量变小的问题之后，相信大家在日后的使用过程中遇到了此类故障发生，也能够根据上述的方法来进行逐步解决，从而以此来保证水流量达到人们所需要的标准。

Possible problems and solutions when the self-priming pump does not discharge water

　　Reasons why the self-priming pump can not pump water: reasons why the pump can not pump water

　　Self priming pump is widely used in agriculture, industry and daily life! In daily use, many people will encounter the situation that the self-priming pump can not suck water. Today, let's discuss how to solve the possible causes and solutions when the self-priming pump can not wash water! In order to help you solve this problem!

　　1、 There is air in the water inlet pipe and pump body

　　1. the water pump is not filled with enough water before starting. Sometimes it seems that the filled water has overflowed from the vent hole, but the air is not completely discharged by rotating the pump shaft, resulting in a small amount of air remaining in the water inlet pipe or pump body.

　　2. the horizontal section of the water inlet pipe in contact with the water pump shall have a downward slope of more than 0.5% against the water flow direction, and the end connecting the water pump inlet shall be, not completely horizontal. If it is tilted upward, air will remain in the water inlet pipe, reducing the vacuum in the water pipe and water pump and affecting the water absorption.

　　3. the packing of the water pump has been worn or the packing has been pressed too loose due to long-term use, resulting in a large amount of water ejected from the gap between the packing and the pump shaft sleeve. As a result, the external air enters the inside of the water pump from these gaps, affecting the water lifting.

　　4. due to long-term potential underwater, the water inlet pipe has holes due to pipe wall corrosion, and the water surface continues to drop after the pump works. When these holes emerge from the water surface, air enters the civil water inlet pipe from the holes.

　　5. cracks appear at the elbow of the water inlet pipe, and there is a small gap between the water inlet pipe and the water pump, which may cause air to enter the water inlet pipe.

　　2、 Water pump speed too low

　　1. human factors. Some users are equipped with another motor at will to drive due to the damage of the original motor, resulting in small flow, low lift and even no water supply.

　　2. mechanical failure of water pump. The loose fastening nut between the impeller and the pump shaft or the deformation and bending of the pump shaft may cause the impeller to move more, direct friction with the pump body, or bearing damage, which may reduce the speed of the water pump.

　　3. the power machine is not well maintained. The motor loses excitation due to burnout of winding. The change of winding turns, wire diameter and wiring method during maintenance, or the failure is not completely eliminated during maintenance, will also change the speed of the water pump.

　　3、 Suction lift too large

　　Some water sources are deep, and the peripheral terrain of some water sources is flat, and the allowable suction range of the pump is ignored, resulting in less or no water absorption. Know that there is a limit to the degree of vacuum that can be established at the suction port of the water pump. The suction range of the vacuum is about 10 meters of water column, and the vacuum that cannot be established by the water pump. And if the vacuum is too large, the water in the pump is easy to be gasified, which is unfavorable to the work of the pump. Therefore, each centrifugal pump has its allowable suction lift, which is generally between 3-8.5m. When installing the water pump, it must not be simple and convenient.

　　4、 Excessive resistance loss in water inlet and outlet pipes

　　Some users have measured that although the vertical distance from the reservoir or water tower to the water surface of the water source is slightly less than the pump lift, the water volume is still small or can not be lifted. The reason is that the pipeline is too long, there are many water pipe bends, and the resistance loss of water flow in the pipeline is too large. The reason is that the pipeline is too long, there are many water pipe bends, and the resistance loss of water flow in the pipeline is too large. Generally, the resistance of 90 degree elbow is greater than that of 120 degree elbow. The head loss of each 90 degree elbow is about 0.5-1 m, and the resistance of each 20 m pipeline can make the head loss about 1 m. In addition, some users also randomly choose the diameter of the inlet and outlet pipes of the water pump, which also has a certain impact on the lift.

　　5、 Influence of other factors

　　(1) The bottom valve cannot be opened. Usually, the bottom valve gasket is stuck because the water pump has been used for too long, and the bottom valve without gasket may be rusted.

　　(2) The bottom valve filter net is blocked; Or the filter screen is blocked due to the potential sludge layer in the water of the bottom valve.

　　(3) The impeller is severely worn. The impeller blades are worn out after long-term use, which affects the performance of the water pump.

　　(4) The failure or blockage of the check valve of the gate valve may reduce the flow or even prevent the pumping of water.

　　(5) The leakage of the outlet pipeline will also affect the water extraction.

　　The causes and solutions for the failure of the self-priming pump are as follows:

　　1. Low voltage: adjust the voltage

　　2. Too high suction lift or too long suction pipeline: reduce suction lift or shorten pipeline

　　3. Excessive mechanical seal leakage: repair or replace

　　4. The filter screen of pump body or inlet pipe is blocked by sundries and stones: check and remove the blockage

　　5. No or insufficient liquid storage in the self-priming pump: sufficient

　　Why the self-priming pump can't suck water: the reason why the self-priming pump can't suck water

　　1. Common self-priming pump products can only be used after the pump is filled with liquid before the first use.

　　Some users do not add water or add too little water, which may be the reason why the self-priming pump can not pump water, so the pump should be started after filling up the liquid.

　　2. Air leakage in the suction pipeline: eliminate the air leakage in the pipeline. Within the allowable suction range, check that the water has not been sucked up after the pump is started for 4-5 minutes. Please put your ears close to the suspected air leakage of the inlet pipe and listen for the sound of inhalation.

　　Or apply white emulsion to the suspected air leakage area for repair.

　　3. Since the voltage is too low and does not reach the effective voltage, the self-priming pump does not operate normally. Adjust the voltage.

　　4. Too high suction lift or too long suction pipeline: reduce the suction lift or shorten the pipeline, and replace the self-priming pump with a larger suction lift, such as the high suction self-priming pump.

　　5. Leakage of mechanical seal will also cause the self-priming pump to fail to pump water, because leakage of mechanical seal will also affect the self-priming capacity of the self-priming pump. In this case, replace the mechanical seal with a new one.

　　6. The filter screen of pump body or inlet pipe is blocked by sundries and stones: check and remove the blockage.

　　7. Impeller damaged or worn: replace with a new impeller.

　　8. Incorrect installation of outlet pipeline and too many elbows: there are too many n-shaped pipelines. It is recommended to install an automatic exhaust valve at the highest point.

　　9. Reverse connection of three-phase motor: exchange two phases.

　　10. Steam and water cannot be separated due to blockage of the return hole of the self-priming pump: check and clean it up.

　　11. Some users have too many inlet pipe elbows due to on-site environment and other reasons during installation, which may also be the reason why the self-priming pump can not suck water.

　　Generally, the self-priming pump manufacturer suggests that the number of inlet elbows of the self-priming pump should be controlled within 1-2, with a maximum of 3. Too many elbows will lose the suction range of the self-priming pump.

　　12. Because the gravity of the self-priming liquid is too large, it will also be one of the reasons why the self-priming pump can not pump water.

　　Causes and solutions of self-priming pump buzzing without water supply

　　During the maintenance of the self-priming pump, if the water flow of the self-priming pump is small, it will not only affect the self-priming ability, but also easily cause a series of problems such as high engine temperature and short circuit under the action of pressure. What methods should we choose to deal with such failures? Please follow Xiaobian to have a look. The reason why the self-priming pump does not fill water and the treatment method!

　　First, check the gap of the impeller:

　　After the self-priming pump has been used for a long time, it is easy to loose the impeller, resulting in too large gap between the impeller and the machine itself, which will not only affect the water flow of the self-priming pump itself, but also cause damage to the machine packing. In the face of these conditions, the manufacturer suggests that it is best to replace the shell of the self-priming pump itself, or better adjust the impeller ring, which is the key to help the smooth progress of the self-priming effect. This method is applied to help during normal use, and corresponding progress and improvement have been made in ensuring the self-priming effect of the machine itself.

　　Second, replace the impeller pipeline:

　　Sometimes the water flow pipeline may be blocked by dirt after it has not been effectively cleaned for a long time. Choosing this method is easy to cause the risk of poor self-priming capacity. Therefore, the inner wall of the pipeline shall be cleaned regularly. In addition, if too much storage is found, the pipeline shall be replaced in time to ensure that the effluent effect is improved.

　　After solving the problem that the water flow of the self-priming pump becomes smaller, I believe that if you encounter such failures in the future use, you can also solve them step by step according to the above methods, so as to ensure that the water flow meets the standards people need.