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Water loop vacuum pump works
Add Time : 2013-11-13 16:33:57   Views : 4371

Water loop vacuum pump ( referred to as water looppumps ) is a rough vacuum , it can get ultimate vacuum of 2000 ~ 4000Pa, atmospheric jet series of up to 270 ~ 670Pa. Water ring vacuum pump is used as a compressor, a known water ring compressor , belong to the low-pressure compressor, a pressure in the range of 1 ~ 2 × 105Pa gauge pressure .
Originally used as a water loop vacuum pump self-priming pump , then gradually used in petroleum , chemical, machinery , mining, light industry, medicine and food , and many other industrial sectors. In many industrial production processes , such as the vacuum filtration , vacuum water, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum resurgence and vacuum degassing , water ring vacuum pump is widely used . Due to the rapid development of application technology of vacuum , water ring vacuum pump to get in terms of crude has been valued by the people . As the water ring vacuum pump in the gas compression is isothermal , it can be exhausting flammable , explosive gases , but can also dust extraction , gas water , so the water ring pump applications is increasing.
Figure: equipped with the right amount of water as the working fluid in the pump body . When the impeller in the direction indicated in the figure clockwise , the water is thrown around by the impeller , the action of centrifugal force , the water forms a closed ring shape of the cavity of the pump depends on the thickness and other similar . Within the last part of the surface water ring coincided with the impeller hub tangent , the lower part of the water just touching the surface of the ring with the blade tip ( actually leaves in the water, there is a certain ring insertion depth ) . At this point the impeller hub between water and forms a crescent-shaped ring of space , and this space has been divided into an equal number of impeller blades several small chambers . If the impeller upper 0 ° as a starting point , then the volume of the impeller rotating 180 ° when the small chamber from small to big , and with the end face of the intake port connected , then the gas is inhaled , when the suction end of the small chamber then the suction port isolation ; when the impeller continues to rotate , the small chamber from large to small , the gas is compressed ; small chamber when communicating with the exhaust port , the gas will be discharged pump.
In summary, the water ring vacuum pump is by changing the volume of the pump chamber to achieve suction, compression and exhaust , so it belongs to the variable capacity pump. Water ring pumps and other types of mechanical vacuum pump compared to the following advantages:
Simple structure, less precision , easy to process.
Compact, high number of revolutions of the pump , and can be directly connected with the motor without reduction gear . Therefore, the structure of small size , you can get a large displacement, the area is also small .
Essentially isothermal compression of the gas , i.e., a small temperature variation during compressed gas .
Since no metal friction surface cavity pump , the pump is no need for lubrication , and wear small. The seal between the rotating member and the fixing member may be done directly by the seal .
Inspiratory uniform, smooth and reliable, simple operation, easy maintenance.
Water ring vacuum pump also has its disadvantages:
Low efficiency, generally about 30% , preferably up to 50 %.
Vacuum is low, not only because of restrictions on the structure , but more importantly is to limit saturated vapor pressure of the working fluid by . Water as the working fluid , the ultimate pressure can reach 2000 ~ 4000Pa. Oil as the working fluid , up to 130Pa.
In short , because the water ring vacuum pump in the gas compression is isothermal , it can be exhausting flammable and explosive gases. Since there is no exhaust valve and the friction surface , it can be pumped with gas in addition to dust , gas and gas condensate water mixture . With these outstanding features , despite its low efficiency, and is still widely used.
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Tel : +86 21 3251 3913    Website : Http://www.yzvacuum.com   Email :info@yzvacuum.com
Addr :ZhenBei Road, Putuo District, Shanghai, No. 915 (Jinshajiang Junction)



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