Addtime： 2020-07-18 Browse times： 3675
Recently, some netizens left a message asking why the water ring vacuum pump doesn't work out. Let's have a look at it together!
1. Air leakage of water inlet pipe of vacuum pump
Because of the long-term potential underwater, the pipe wall corrosion presents holes, and the water surface keeps falling after the pump incident. When these holes are exposed to the water surface, the atmosphere will enter the inlet pipe from the holes. Or there are cracks at the elbow of the water inlet pipe and a huge gap between the water inlet pipe and the water pump, which may make the atmosphere enter the water inlet pipe.
2. The speed of vacuum pump is too low
Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in impeller movement, indirect friction with the pump body, or bearing damage, may reduce the pump speed. Or the motor loses magnetism due to the burning of the winding, the change of the winding turns, wire diameter and wiring essentials in the maintenance, or the failure in the maintenance can also change the speed of the water pump.
3. The suction range of vacuum pump is too large
As a result, some of the deeper water sources are not allowed to absorb water, and some of them do not absorb water at all. It is necessary to know that the vacuum degree that can be established at the water pump inlet is limited, and the absolute vacuum suction head is about 10 m water column high, but it is impossible for the pump to establish absolute vacuum. Moreover, if the vacuum is too large, the water in the pump is easy to be gasified, which is beneficial to the work of the pump. Therefore, each centrifugal pump has its maximum allowable suction, generally between 38.5 meters. When installing the water pump, it is not only convenient and simple.
The resistance loss in the inlet and outlet pipes of the water flow is too large p; some users, after measurement, even though the vertical distance from the reservoir or water tower to the water surface of the water source is slightly less than the pump head, the water lifting capacity is still small or cannot be lifted. The reason is that the pipeline is too long and there are many bends in the pipe, and the resistance loss of water flow in the pipeline is too large. The reason is that the pipeline is too long and there are many bends in the pipe, and the resistance loss of water flow in the pipeline is too large. In general, 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 head loss of every 20 m pipe is about 1 m. In addition, some local users also randomly pump in and out of the pipe diameter, which also has a certain impact on the lift.
4. Influence of other factors
1. The bottom valve cannot be opened. Usually due to the pump shelving time is too long, the bottom valve gasket is stuck, no gasket bottom valve may rust.
2. The filter net of bottom valve is blocked; or the filter screen is blocked in the sludge layer of bottom valve potential water.
3. The impeller is seriously worn. The impeller blade is worn by temporary use, which affects the performance of the pump.
4. The failure or blockage of the check valve of gate valve will reduce the flow rate and even fail to pump water.
5. Leakage in the inlet pipe will also affect the water withdrawal. Recently, some netizens left a message asking why the water ring vacuum pump doesn't work out. Let's have a look at it together!
1. Air leakage of water inlet pipe of vacuum pump
Because of the long-term potential underwater, the pipe wall corrosion presents holes, and the water surface keeps falling after the pump incident. When these holes are exposed to the water surface, the atmosphere will enter the inlet pipe from the holes. Or there are cracks at the elbow of the water inlet pipe and a huge gap between the water inlet pipe and the water pump, which may make the atmosphere enter the water inlet pipe.
2. The speed of vacuum pump is too low
Impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in impeller movement, indirect friction with the pump body, or bearing damage, may reduce the pump speed. Or the motor loses magnetism due to the burning of the winding, the change of the winding turns, wire diameter and wiring essentials in the maintenance, or the failure in the maintenance can also change the speed of the water pump.
3. The suction range of vacuum pump is too large
Some of the water sources are deep, and some of them have flat peripheral terrain, but the allowable suction head of the pump is ignored, so the results of little or no water absorption occur. It is necessary to know that the vacuum degree that can be established at the water pump inlet is limited, and the absolute vacuum suction head is about 10 m water column high, but it is impossible for the pump to establish absolute vacuum. Moreover, if the vacuum is too large, the water in the pump is easy to be gasified, which is beneficial to the work of the pump. Therefore, each centrifugal pump has its maximum allowable suction, generally between 38.5 meters. When installing the water pump, it is not only convenient and simple.
The resistance loss in the inlet and outlet pipes of the water flow is too large p; some users, after measurement, even though the vertical distance from the reservoir or water tower to the water surface of the water source is slightly less than the pump head, the water lifting capacity is still small or cannot be lifted. The reason is that the pipeline is too long and there are many bends in the pipe, and the resistance loss of water flow in the pipeline is too large. The reason is that the pipeline is too long and there are many bends in the pipe, and the resistance loss of water flow in the pipeline is too large. In general, 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 head loss of every 20 m pipe is about 1 m. In addition, some local users also randomly pump in and out of the pipe diameter, which also has a certain impact on the lift.
4. Influence of other factors
1. The bottom valve cannot be opened. Usually due to the pump shelving time is too long, the bottom valve gasket is stuck, no gasket bottom valve may rust.
2. The filter net of bottom valve is blocked; or the filter screen is blocked in the sludge layer of bottom valve potential water.
3. The impeller is seriously worn. The impeller blade is worn by temporary use, which affects the performance of the pump.
4. The failure or blockage of the check valve of gate valve will reduce the flow rate and even fail to pump water.
5. Leakage in the inlet pipe will also affect the water withdrawal.
Scan QR code and add wechat
Download
Vacuum knowledge
Service
Contact us