管中泵空转的原因及工作原理

管中泵空转的原因及工作原理
管中泵运行时，不允许管中泵空转，许多客户还担心管中泵空转，原因是他们不了解空转的原因和解决方法。其实泵在管道中空转很短的时间内不会造成损坏（一般在1分钟内），龙亚泵业编辑整理文章，为您介绍。VAREM管中泵空转原因：1。管中泵进水口的介质不足或进水压力不足，或管中泵进水管堵塞，或管中泵腔内空气未排出。2叶轮与介质没有接触或接触很少，不能有效工作，液体不能正常排出，都是空转工作。由于没有做有效功，电机上的负载很小，产生的电流也很小。对电机的影响不大。泵在管道中空转对泵有致命的影响。3。管中泵空转容易产生气蚀，造成泵体和流道部件损坏；管中泵空转时机械密封或填料密封形式，得不到液体润滑，导致干磨损，造成快速损坏，甚至可能导致泵烧毁。4泵的转子部件和泵在空转管中受热。液体没有冷却。在热膨胀和冷缩的作用下，间隙较窄的部位（如密封圈）容易咬合；泵在空转多级管中的平衡盘没有润滑，平衡盘很快就会被烧坏。VAREM管中泵适用于建筑二次供水、传统泵房改造、高层住宅楼、避难层或中继层泵房设计、市政管网中途加压等领域。下面将详细介绍其工作原理。管中泵有两个进水口，一个接市政管网，另一个接水库。接市政管网的水进入稳流罐，罐内空气由防负压装置排出。水满后，防负压装置自动关闭。当市政管网压力满足水压要求时，无需启动管中泵自行供水。市政管网压力不足时，启动管中泵补充压力。充分利用市政管网的压力，节约能源。当市政管网停止供水时，稳流罐内液位下降，压力下降，回流阻止阀门关闭。与水池相连的管网阀门自动开启，管道中的水泵从水池取水。无论管中泵组水源接在何处，管中泵均采用变频运行。变频可根据用水量调节管中泵电机的转速，实现恒压变压供水。当工作管道中的泵运行到工频时，启动管道中的另一台泵进行变频运行，钛龙泵以工频同步运行。进一步达到多用多供、少用少供的目的。当用水量瞬间变化较大时，系统设置一套压力罐，及时补压，防止用水量突然变化引起的压降影响最小利用水点压力的稳定。
Reason and working principle of pump in pipe idling
When the in pipe pump is running, it is not allowed to idle. Many customers are also worried about the idling of the in pipe pump because they do not understand the reasons for idling and the solutions. As a matter of fact, the pump will not be damaged in a short period of time (generally within 1 minute) when it rotates in the pipeline. Longya pump will edit the article and introduce it to you. The causes of the pump idling in the varem pipe are as follows: 1. The medium in the water inlet of the pump in the pipe is insufficient or the water inlet pressure is insufficient, or the water inlet pipe of the pump in the pipe is blocked, or the air in the cavity of the pump in the pipe is not discharged. 2. The impeller has little or no contact with the medium, so it can't work effectively, and the liquid can't be discharged normally, so it is idling. Because no effective work is done, the load on the motor is very small and the current generated is also very small. It has little influence on the motor. Pump rotating in the pipeline has a fatal impact on the pump. 3。 When the pump in pipe is idling, it is easy to produce cavitation, causing damage to the pump body and flow channel components; when the pump in pipe is idling, the mechanical seal or packing seal can not get liquid lubrication, resulting in dry wear, rapid damage, and even the pump may be burned. 4. The rotor parts of the pump and the pump are heated in the idle pipe. The liquid is not cooled. Under the action of thermal expansion and cold contraction, the parts with narrow gap (such as sealing ring) are easy to bite; the balance disk of the pump in the idle multi-stage pipe is not lubricated, and the balance disk will be burned out soon. Varem in pipe pump is suitable for secondary water supply of buildings, reconstruction of traditional pump room, design of high-rise residential buildings, pump room of refuge or relay floor, and midway pressurization of municipal pipe network. Its working principle will be introduced in detail below. The pump in the pipe has two water intakes, one is connected to the municipal pipe network, and the other is connected to the reservoir. The water connected to the municipal pipe network enters the steady flow tank, and the air in the tank is discharged by the anti negative pressure device. When the water is full, the anti negative pressure device will shut down automatically. When the municipal pipe network pressure meets the water pressure requirements, there is no need to start the pump in the pipe to supply water by itself. When the pressure of municipal pipe network is insufficient, start the pump in the pipe to supplement the pressure. Make full use of the pressure of municipal pipe network to save energy. When the municipal pipe network stops water supply, the liquid level in the steady flow tank drops, the pressure drops, and the backflow prevents the valve from closing. The pipe network valve connected with the pool automatically opens, and the water pump in the pipeline takes water from the pool. No matter where the water source of the pump set in the pipe is connected, the pump in the pipe adopts frequency conversion operation. Frequency conversion can adjust the speed of the pump motor in the pipe according to the water consumption to realize constant pressure and variable pressure water supply. When the pump in the working pipeline runs to the power frequency, start another pump in the pipeline for frequency conversion operation, and the titanium dragon pump runs synchronously at the power frequency. To further achieve the purpose of more use and more supply, less use and less supply. When the instantaneous change of water consumption is large, a set of pressure tank is set in the system to make up the pressure in time to prevent the pressure drop caused by the sudden change of water consumption from affecting the stability of the pressure at the utilization point.