自吸泵吸不上水的原因（水泵吸不上水的原因）

　　自吸泵是在農業、工業和日常生活中應用廣泛!在日常使用中，很多人會碰到自吸泵吸不上水的情況，今天，我們一起來探討下怎樣解決自吸泵洗不出水時可能存在的原因與解決方法!以便幫助各位解決此問題!

　　一、進水管和泵體內有空氣

　　1.水泵啟動前未灌滿足夠的水，有時看上去灌的水已從放氣孔溢出，但未轉動泵軸交空氣完全排出，致使少許空氣殘留在進水管或泵體中。

　　2.與水泵接觸的進水管的水平段逆水流方向應用0.5%以上的下降坡度，連接水泵進口的一端為，不要完全水平。如果向上翹起，進水管內會存留空氣，降低了水管和水泵中的真空度，影響吸水。

　　3.水泵的填料因長期使用已經磨損或填料壓得過松，造成大量的水從填料與泵軸軸套的間隙中噴出，其結果是外部的空氣就從這些間隙進入水泵的內部，影響了提水。

　　4.進水管因長期潛在水下，管壁腐蝕出現孔洞，水泵工作后水面不斷下降，當這些孔洞露出水面后，空氣就從孔洞進入民進水管。

　　5.進水管彎管處出現裂痕，進水管與水泵連接處出現微小的間隙，都有可能使空氣進入進水管。

　　二、水泵轉速過低

　　1.人為的因素。有部分用戶因原配電機損壞，就隨意配上另一臺電動機帶動，結果造成了流量小、揚程低甚至不上水的后果。

　　2.水泵本身的機械故障。葉輪與泵軸緊固螺母松脫或泵軸變形彎曲，造成葉輪多移，直接與泵體磨擦，或軸承損壞，都有可能降低水泵的轉速。

　　3.動力機維修不靈。電動機因繞組燒毀，而失磁，維修中繞組匝數、線徑、接線方法的改變，或維修中故障未徹底排除因素也會使水泵轉速改變。

　　三、吸程太大

　　有些水源較深，有些水源的外圍地勢較平坦處，而忽略了水泵的容許吸程，因而產生了吸水少或根本吸不上水的結果。要知道水泵吸水口處能建立的真空度是有限度的，真空的吸程約為10米水柱高，而水泵不可能建立的真空。而且真空度過大，易使泵內的水氣化，對水泵工作不利。所以各離心泵都有其容許吸程，一般在3-8.5米之間。安裝水泵時切不可只圖方便簡單。

　　四、水流的進出水管中的阻力損失過大

　　有些用戶經過測量，雖然蓄水池或水塔到水源水面的垂直距離還略小于水泵揚程，但還是提水量小或提不上水。其原因常是管路太長、水管彎道多，水流在管路中阻力損失過大。其原因常是管路太長、水管彎道多，水流在管路中阻力損失過大。一般情況下90度彎管比120度彎管阻力大，每一90度彎管揚程損失約0.5-1米，每20米管路的阻力可使揚程損失約1米。此外，有部分用戶還隨意水泵進、出管的管徑，這些對揚程也有一定的影響。

　　五、其它因素的影響

　　(1)底閥打不開。通常是由于水泵擱置時間太長，底閥墊圈被粘死，無墊圈的底閥可能會銹死。

　　(2)底閥濾器網被堵塞;或底閥潛在水中污泥層中造成濾網堵塞。

　　(3)葉輪磨損嚴重。葉輪葉片經長期使用而磨損，影響了水泵性能。

　　(4)閘閥可止回閥有故障或堵塞會造成流量減小甚至抽不上水。

　　(5)出口管路的泄漏也會影響提水量。

　　自吸水泵不上水的原因與解決方法如下：

　　1、電壓過低：調整電壓

　　2、吸程過高或吸入管路太長：降低吸程或縮短管路

　　3、機械密封泄漏過大：修理或更換

　　4、泵體里面或者進口管道濾網遭雜物石頭堵塞：檢查清理掉堵塞物

　　5、自吸泵泵體內未加儲液或儲液不足：加足

　　自吸泵怎么吸不出來水：自吸泵吸不上水的原因

　　1、常用的自吸泵產品都需要**次使用前把泵里面灌滿液體才能使用。

　　有的用戶沒有加水、或者加水太少都有可能是自吸泵吸不上水的原因，所以應該加滿液體再啟動泵。

　　2、吸入管路漏氣：消除管路漏氣現象，在允許吸程范圍內檢查方法泵啟動4-5分鐘水還未吸上來。請用耳朵貼近進口管道疑是漏氣的地方聽有無吸氣的聲音。

　　或者在疑是漏氣的地方涂層白乳膠等方法進行修補。

　　3、由于電壓過低未達到有效電壓促使自吸泵未正常運行，調整電壓即可。

　　4、吸程過高或吸入管路太長：降低吸程或縮短管路，更換吸程更大的自吸泵例如：高吸程自吸泵。

　　5、機械密封漏水也會導致自吸泵吸不上水因為機械密封漏水自吸泵也會影響自吸泵的自吸能力。出現這種情況更換新的機械密封即可。

　　6、泵體里面或者進口管道濾網遭雜物石頭堵塞：檢查清理掉堵塞物。

　　7、葉輪損壞或者磨損：更換新葉輪。

　　8、出口管路安裝不正確彎頭太多：管路成N字型的管路太多建議在**點安裝自動排氣閥。

　　9、三相電機接線接反：互換其中兩相。

　　10、自吸泵回流孔遭堵塞導致汽水無法分離：檢查清理掉。

　　11、有的用戶在安裝過程中由于現場環境等原因導致進口管道彎頭數量太多，這樣也會是自吸泵吸不上水的原因。

　　一般情況下自吸泵廠家建議自吸泵進口彎頭控制在1-2個以內為宜，*多3個，彎頭太多會損耗自吸泵的吸程。

　　12、由于所自吸的液體比重太大也會是自吸泵吸不上水的原因之一。

　　自吸泵嗡嗡響不上水原因及解決方法相關延伸閱讀：自吸泵水流量小沒勁

　　在給自吸泵進行維修的過程中，如果自吸泵的水流量較小，不僅會影響到自吸的能力，而且很容易在壓力的作用之下，造成發動機的溫度過高從而誘發短路等一系列問題的發生。針對于這樣的故障問題，我們應該選擇哪些方法來進行處理呢?下面請跟著小編一起來看看吧。自吸泵不上水的原因及處理方法!

　　**、檢查葉輪的縫隙：

　　在自吸泵使用時間過長之后，很容易出現葉輪松動造成葉輪和機器本身的縫隙過大，這樣一來不僅會影響到自吸泵本身的水流量，同時也會造成機器填料受到損傷的情況發生。面對這些狀況的出現，廠家建議大家**能夠更換自吸泵本身的外殼，或者是將葉輪的口環進行更好地調整，才是幫助自吸效果取得順暢進行的關鍵所在。在平時的使用期間應用此方法前來幫忙，在確保機器本身的自吸效果上取得了相應的進步和完善。

　　第二、更換葉輪的管路：

　　有些時候水流管路在長時間沒有得到有效的清理之后，會出現被臟東西堵住的可能，通過這樣的方法進行選擇，很容易造成自吸能力變差的風險。所以定期地對管路的內壁進行清理，另外如果發現儲存物過多，需要及時地將管路做到更換處理，才能確保出水效果獲得**。

　　在解決了關于自吸泵水流量變小的問題之后，相信大家在日后的使用過程中遇到了此類故障發生，也能夠根據上述的方法來進行逐步解決，從而以此來保證水流量達到人們所需要的標準。

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.