Vacuum pump is a device that generates, improves and maintains vacuum in an enclosed space by various methods. Vacuum pump can be defined as a device or equipment that utilizes mechanical, physical, chemical or physicochemical methods to pump a container to obtain a vacuum. With the development of vacuum applications, many kinds of vacuum pumps have been developed, with pumping speeds ranging from zero liters per second to hundreds of thousands and millions of liters per second. According to the working principle of vacuum pumps, vacuum pumps can basically be divided into two types, i.e. gas transfer pumps and gas trapping pumps. With the vacuum application technology in the field of production and scientific research on the application of the pressure range of the requirements of the wider and wider, most of the need for several types of vacuum pumps to form a vacuum pumping system *** with the pumping in order to meet the requirements of the production and scientific research process, due to the vacuum application sector involved in the range of working pressures is very wide, so any one type of vacuum pumps can not be completely suitable for all the range of working pressures, only according to the different operating principles and gas transfer pumps and gas capture pumps. Different types of vacuum pumps can only be used according to different working pressure ranges and different working requirements. For the convenience of use and the needs of various vacuum processes, sometimes a variety of vacuum pumps according to their performance requirements combined to unit type application. The following is to say that the vacuum pump model of the relevant content.
Vacuum pump models
The models of water ring vacuum pumps on the market nowadays are roughly divided into the following:
2BA water ring vacuum pump and compressor
2SK water ring vacuum pump and compressor
2SK-P1 water ring pump-atmospheric ejector pump unit
2BV Water Ring Vacuum Pumps and Compressors
2BEC Water Ring Vacuum Pumps and Compressors
SK Water Ring Vacuum Pumps: SK Water Ring Vacuum Pumps and Compressors are used for pumping or pressurizing air and other non-corrosive gases which are not dissolved in water and do not contain solid particles, so as to form a vacuum and pressure in the airtight containers to satisfy the requirements of the process flow. The gas sucked or pressed is allowed to be mixed with a small amount of liquid.
2BE water ring vacuum pump: 2BE water ring vacuum pump and compressor, based on years of scientific research results and production experience, combined with the international advanced technology of similar products, the development of energy-saving and efficient products are usually used for pumping gases that do not contain solid particles, do not dissolve in water, and are non-corrosive, so as to form a vacuum and pressure in a closed container.
Vacuum pumps need to pay attention to the following two aspects of the work:
1, as far as possible, required to be in the high-efficiency zone, that is, in the critical vacuum or critical exhaust pressure of the area of operation.
2. Operation near maximum vacuum or maximum exhaust pressure should be avoided. Running in this area, not only the efficiency is extremely low, but also the work is very unstable, easy to produce vibration and noise. For the vacuum pump with high vacuum degree, running in this area, often also occurs in the phenomenon of cavitation, the obvious sign of this phenomenon is the noise and vibration in the pump. Cavitation can lead to damage to the pump body, impeller and other parts, so that the pump can not work.
Based on the above principles, when the pump required vacuum or gas pressure is not high, can be prioritized in the single-stage pump. If the vacuum or exhaust pressure is high, single-stage pump often can not meet, or, the pump is required to pump in a higher vacuum still have a larger volume of gas, that is, the requirement of the performance curve in the higher vacuum is flatter, two-stage pump can be selected. If the vacuum degree is required to be above -710mmHg, water ring-big gas pump or water ring-Roots vacuum unit can be chosen as the pumping device.
If it is only used as vacuum pump, it is better to choose single-acting pump. Because the structure of single-acting pump is simple, easy to manufacture and maintain, and good anti-cavitation in high vacuum.
If only used as a compressor with large gas volume, double-acting pump is more suitable. Because the double-acting pump gas volume, small size, light weight, radial force can be automatically balanced, the shaft is not easy to produce fatigue fracture, water ring pump service life is longer.
Variable displacement vacuum pump working principle and advantages and disadvantages
Reciprocating vacuum pumps, rotary vane vacuum pumps, slide valve vacuum pumps, Roots vacuum pumps rely on the reciprocating piston or rotating the gas inhalation, compression and discharge. Their advantage is that the new pump vacuum is relatively high, but the piston is a running part, so the piston wear can not be avoided, with the increase in the number of overhaul of the work of the vacuum will continue to decline until it can not meet the production requirements. Such pumps work noisy, high oil consumption, high failure rate is also its fatal shortcomings, generally need to open a standby one, which invariably increases the investment in equipment and operating costs. In addition, if such pumps pumping water vapor and other condensable gases, will make the lubricating oil emulsification, and therefore can only be used in the pumping of non-condensable (air) gas, but also can not be pumped with particulate media, which also limits the scope of its application.
(2) water ring vacuum pump is installed in the pump casing with multi-blade eccentric rotor rotation, the water thrown to the pump casing to form a concentric water ring with the pump casing, the water ring and the rotor blades to form a volume cycle changes in order to inhale the gas, compression and discharge. Its advantage is low vacuum when the pumping volume is large, can be directly pumping water vapor and other condensable gases. Its disadvantages are low vacuum; can not pump with granular media; rotor high-speed rotation is not easy to do anti-corrosion treatment, so can not pump with corrosive media.
The above is related to the vacuum pump model, I hope it can help you!
Tuba Rabbit online free for everyone to provide "each decoration offer, 1-4 local decoration company, 3 sets of decoration design program", and decoration to avoid pit strategy! Click on this link:/yezhu/zxbj-cszy.php?to8to_from=seo_zhidao_m_jiare&wb, you can get free Oh~