Nowadays, the application of liquid ring vacuum pump is more and more extensive. It plays an important role in our production and life, and is recognized by more and more people. It also benefits from its efficiency and convenience, in order to give full play to its advantages.
Sudan liquid ring vacuum pump Classification :
Sudan liquid ring vacuum pump according to different structures, it can be divided into single-stage single-acting liquid ring vacuum pump, single-stage double-acting liquid ring vacuum pump, double suction ring vacuum pump and atmospheric water-liquid ring vacuum pump.
Single-stage single-acting liquid ring vacuum pump: single-stage refers to only one impeller, single-acting refers to the impeller every rotation, suction and exhaust once, the limit vacuum of this pump is higher, but the pumping speed and efficiency are lower.
Single-stage double-acting liquid ring vacuum pump: single-stage refers to only one impeller, double-acting refers to the impeller every rotation cycle, suction, exhaust twice. Under the same beat speed, the size and weight of the double-acting liquid ring vacuum pump are much less than that of the single-acting pump. Because the working chamber is symmetrically distributed on both sides of the pump wheel shell, the load acting on the rotor is improved. The pump has higher pumping speed and efficiency, but lower limit vacuum.
Double suction ring vacuum pumps: Most of them are single-acting pumps in series. In essence, the impellers of two single-stage single-acting liquid ring vacuum pumps are joined together by a common spindle. Its main feature is that they still have high pumping speed and stable working condition at high vacuum.
Atmospheric liquid ring vacuum pump: In fact, the air ejector is connected with the liquid ring vacuum pump in series. The air pump in series in front of the liquid ring vacuum pump is designed to improve the limit vacuum and expand the scope of application of the pump.
According to the way of suction and exhaust, it can be divided into axial suction and exhaust and radial suction and exhaust.
Axial suction and exhaust: The suction and exhaust of gas are carried out through the suction and exhaust ports on the side cover of the shell. Its advantages are simple structure and convenient maintenance. The disadvantage is that when gas enters and discharges the impeller, the direction of gas flow is perpendicular to the direction of impeller blade motion, and the gas can not enter uniformly on the whole blade width. Out of the impeller, which increases the gas into and out of the impeller hydraulic loss, reducing the efficiency of the pump.
Radial suction and exhaust: The gas entering and discharging impeller is realized by the suction and exhaust ports installed on the gas distributor at the inner circle of the impeller (equivalent to the wheel). The advantage is that the gas can enter and exit the impeller within the full width of the blade, and the shape of the suction and exhaust ports can also help the gas entering and discharging. The direction of discharging impeller is basically the same as that of impeller movement, which reduces hydraulic loss and improves pump efficiency. The disadvantage is that the structure of air salary distributor is complex and the precision of processing and installation is high.
Sudan liquid ring vacuum pump Working Principle:
The working principle of liquid ring vacuum pump is that the pump body is equipped with appropriate amount of water as working fluid. When the impeller rotates clockwise, the water is thrown around by the impeller. Because of the centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. The inner surface of the upper part of the water ring is just tangent to the hub of the impeller, and the inner surface of the lower part of the water ring is just in contact with the top of the blade (in fact, the blade has a certain insertion depth in the water ring). At this time, a crescent-shaped space is formed between the hub and the water ring of the impeller, which is divided into several small cavities with equal number of blades by the impeller. If the starting point is 0 degrees above the impeller, the volume of the small chamber increases from small to large at 180 degrees before the impeller rotates, and is connected with the suction port on the end surface. At this time, the gas is absorbed, and at the end of the suction, the small chamber is isolated from the suction port; when the impeller continues to rotate, the small chamber becomes smaller and compresses the gas; when the small chamber and the exhaust port continue to rotate, the gas is compressed. When connected, the gas is discharged from the pump. In this way, whenever the impeller rotates one week, the space between the blades is sucked and discharged once. Many spaces are working continuously, and the pump continuously sucks or presses gas.
When used as a compressor, the exhaust port of the pump is connected with a gas-water separator. The steam-water mixture is separated automatically after entering the gas-water separator. The gas is transported from the exhaust pipe to the required system and the water is discharged through the automatic overflow switch. When compressed gas is used, the working water is very easy to heat, and the temperature will become higher when the water is discharged from the outlet of the pump. Therefore, at the bottom of the gas-water separator, cold water should be continuously supplied to supplement the released hot water and play a cooling role so that the working water temperature will not be too high, thus ensuring the performance of the compressor, meeting the technical specifications and meeting the requirements. Process requirements.
In summary, the liquid ring vacuum pump relies on the volume change of the pump chamber to achieve aspiration, compression and exhaust, so it belongs to the variable volume vacuum pump. The difference between gas suction system and pressure delivery system is only that the internal structure of gas-water separator is different. When sucking gas, the suction port pressure is lower than the atmospheric pressure, while the exhaust port pressure is equal to the atmospheric pressure, and the gas-water separator has only overflow pipe. The suction port is atmospheric pressure (or vacuum state) when pressurizing gas, and the exhaust pressure is higher than one atmospheric pressure. In order to ensure the pressure of conveying gas, the water level of the gas-water separator is controlled by the overflow switch.
Sudan liquid ring vacuum pump and compressors are used to suck or compress air and other non-corrosive, water-insoluble, solid-free gases to form vacuum and pressure in closed containers. Because the compression process of gas is isothermal in the working process, it is not easy to cause danger when compressing and sucking explosive gas, so it is widely used.