Common maintenance methods for submersible flow boosters

Common maintenance methods for submersible flow propellers Submersible flow propellers can be divided into two series: mixing and stirring and low-speed propelling flow
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Mixing and stirring series products often use multi-stage motors and use direct-connected structure.
Compared with traditional products, it has the advantages of compact structure, low energy consumption, high efficiency, easy maintenance and maintenance
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The impeller has high manufacturing precision and large thrust.
During operation, the impeller of the submersible flow propeller rotates at a high speed driven by the submersible motor, and pushes the mud-water mixture into the ejector to form a jet, which generates a negative pressure area around the jet, and sucks the air into the jet through the suction pipe.
In the negative pressure area of ​​the nozzle, gas, water and mud are fully mixed in the throat of the ejector, and the kinetic energy of the jet is gradually converted into pressure energy through the diffuser of the ejector and then enters the diffuser
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In the diffuser, the mixture of gas, water and mud is further mixed, forcing the gas to continue shearing, crushing and emulsification to ensure that most of the oxygen is fully dissolved in the water
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At the same time, under the action of the fluid pressure of the jet, the jet carries oxygen molecules and tiny bubbles, which are ejected and diffused obliquely downward from the nozzle of the diffuser.
The bottom slowly rises to the water surface, and the microbubbles generally stay in the water for more than 30 seconds, so that the oxygen in the air is fully dissolved and absorbed, and the oxygen transfer efficiency and oxygenation capacity are improved
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The submersible flow propeller can make the mud water and air generate high negative pressure and strong turbulence, stirring and shearing in the ejector, which promotes the high-frequency oscillation of the liquid film and the air film, so that the diameter of the bubbles is greatly reduced, and the number of bubbles is greatly reduced.
It increases the specific surface area of ​​the bubbles, and also makes the gas-liquid film thinner, which can greatly reduce the mass transfer resistance and make the oxygen molecules better transfer from the gas phase to the liquid phase
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In the process of high-speed advancement of the jet, under the action of high-speed rotation in the disperser, the jet has a high angular velocity, which makes the jet have strong penetrating power, makes the tiny bubbles travel far in the water, and enhances the ability of stirring, pushing flow and oxygenation.

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 　　In the previous article, we talked about the maintenance method of the submersible flow propeller, and briefly introduced some daily maintenance skills.

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This article will explain some of the commonly used maintenance methods of diving flow propellers in daily life
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 　　(1) Add bearing lubricating oil into the bearing body, observe that the oil level should be at the center line of the oil mark, and the lubricating oil should be replaced or supplemented in time
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 　　(2) Always check the oil quality, and if the oil is deteriorated, replace the new oil in time to ensure that the submersible flow propeller works normally
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 　　(3) When the submersible flow propeller is used in the cold winter season, after parking, it is necessary to unscrew the drain plug at the lower part of the pump body to drain the medium
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Prevent freeze cracking
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 　　(4) Try to control the flow rate and lift of the submersible flow propeller within the range indicated on the sign, so as to ensure that the submersible flow propeller operates at the maximum rate point in order to obtain the greatest energy saving effect
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 　　(5) During the operation of the submersible flow propeller, the bearing temperature should not exceed the ambient temperature of 35C°, and the maximum temperature should not exceed 80C°
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 　　(6) If abnormal sound is found in the diving flow propeller, stop immediately to check the cause
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 　　(7) Close the gate valve, outlet pressure gauge and inlet vacuum gauge of the water outlet pipeline
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 　　(8) In the first month of operation, the submersible flow propeller should replace the lubricating oil after 100 hours, and then change the oil once every 500 hours
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 　　(9) Regularly check the wear of the shaft sleeve, and replace it in time when the wear is large
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 　　(10) Check the submersible flow propeller pipeline and joints for looseness
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Turn the dive booster by hand to see if the dive booster is flexible
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