Liquid ring vacuum pump in the use of a period of time, there will be shaking phenomenon, and accompanied by a more shrill sound, a lot of people do not know what causes. Normally, the liquid ring vacuum pump occurs in the case of the above, the probable reasons are as follows:
1, liquid ring vacuum pump parts damage or due to the solid into the vacuum pump cavity caused by, the solution is to check the vacuum pump inside the situation, clear the vacuum pump chamber of the sundry.
2. Due to wear of the bearing or shaft of the liquid ring vacuum pump motor, the solution is to check and replace the new bearing and rotor shaft of the motor.
3. The vacuum pump body of the liquid ring vacuum pump and the shaft center of the motor have not been properly corrected, resulting in wear and tear of the coupling and large vibration and noise. The solution is to replace the new coupling or correct the shaft center line.
4, when the vacuum is too big, the liquid ring vacuum pump will also send out a particularly harsh noise, the solution then open the liquid ring vacuum pump gas shock valve, put some air into the vacuum pump can enter the normal state. Originally used as a liquid ring pump self-priming pumps. Consists of the impeller, vacuum pump body, vacuum exhaust plate, water in the formation of the liquid ring pump body wall, intake and exhaust mouth, auxiliary exhaust valve, etc.
In summary, the liquid ring pump is based on the vacuum pump chamber volume changes to achieve suction, compression and exhaust, so it belongs to the variable-volume vacuum pump.
The impeller is eccentrically installed in the vacuum pump body, when the impeller rotating, the water into the liquid ring vacuum pump body is thrown around by the impeller, due to the effect of centrifugal force, the water formed a similar to the shape of the vacuum pump chamber of the same thickness of the closed liquid ring. The area on the surface of the liquid ring is right with the impeller wheel tangent, liquid ring in the lower part of the surface contact with the top of the blade. At this point, the impeller wheel hub with liquid ring formed between a crescent-shaped space, this space is divided into impeller and blade is equal to the number of a number of small cavity. If the upper part of the impeller is 0° as a starting point, then the impeller 180° before rotation, the volume of the small cavity gradually from small to large, the pressure is constantly reduced, and connected with the suction port on the suction and exhaust disc. When the pressure in the small cavity space is lower than the pressure in the container being pumped, according to the principle of gas pressure balance, the gas being pumped is continuously pumped into the small cavity, at this point is in the suction process. Breathe when complete with inspiratory mouth isolation, from Ⅱ – Ⅱ to Ⅲ – Ⅲ section, the volume of the small cavity is gradually decreases, and the pressure increases continually, at this time is in the compression process, when it comes to an exhaust pressure of compressed gas in advance, forward from the auxiliary exhaust valve exhaust. From the section Ⅲ – Ⅲ to Ⅰ – Ⅰ, interlinked with vent small cavity volume further decrease the pressure rise further, when the gas pressure is greater than the exhaust pressure, the compressed air to escape from the vent is in the process of the continuous operation of the vacuum pump, continuously carrying on the suction, compression, exhaust process, so as to achieve the purpose of continuous extraction.
Liquid ring vacuum pump advantages
Simple structure, manufacturing precision requirements are not high, easy to process.
Compact structure, higher vacuum pump revolution, generally can be directly connected with the motor, no reduction device. Therefore, a small structure size can be used to obtain a large volume of air and a small floor area.
Compressed gas is basically isothermal, that is, the process of compressed gas temperature change is very small.
Because there is no metal friction surface in the vacuum pump chamber, there is no need to lubricate the vacuum pump, and the wear is very small. Sealing between rotating and fixing parts can be done by water seal directly.
The suction is even, the work is stable and reliable, the operation is simple, the maintenance is convenient.
Liquid ring vacuum pump characteristics
The structure is compact, the work balance is reliable and the flow rate is uniform, so the chemical industry production is used to transport or vacuum pump the flammable, explosive and corrosive gas. Liquid ring vacuum pump because impeller stirring liquid, the loss of energy, so its efficiency is very low.
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