【 Weak current College 】 vacuum pump works---Power By 【 China power house network 】

Vacuum pump is used in a variety of methods in a closed space generation, improvement and maintenance of vacuum devices. Vacuum pump can be defined as: the use of mechanical, physical, chemical or physico-chemical methods to be pumped containers to the vacuum suction devices or equipment. With the development of vacuum applications, vacuum pump type has developed a variety, the suction from zero to several liters per second, hundreds of thousands, millions of litres. According to the principle of vacuum pump, the vacuum pump is basically divided into two types, namely gas transfer pump and the pump gas trapping. With the vacuum applied technology in production and scientific research to apply the requirements of the pressure range is becoming more and more wide, most of them need to be made up of several vacuum pump vacuum exhaust ventilation systems common to meet production and requirements for scientific research process, due to the vacuum application sectors involved in the working pressure range is very wide, so any one type of vacuum pumps cannot be fully applicable in all the working pressure range, depending on working pressure range and different work requirements, use different types of vacuum pumps. In order to use the convenience and needs of the vacuum process, sometimes to a variety of vacuum pump combination according to their performance requirements, to set the application type. Various vacuum pump works water ring vacuum pump/liquid ring vacuum pump working principle of the water ring vacuum pumps (hereinafter referred to as water ring pump) is a rough vacuum pump, it can get ultimate vacuum is 2000 ~ 4000Pa, in-line air ejector of up to 270 ~ 670Pa. Water ring pumps can also be used as compressors, liquid ring compressor, is called belong to the low pressure of the compressor, the pressure range is 1 ~ 2 ¡á 105Pa table pressure. Water ring vacuum pump was originally used as a self-priming pump, then gradually used in petroleum, chemical industry, machinery, mining, light industry, medicine and food, and many other industrial sectors. In many industrial production process, such as vacuum filters, vacuum diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum resurgence and vacuum degassing, water ring pump with a wide range of applications. Due to the vacuum application technology leaps and bounds, vacuum water-ring pumps in crude has been obtained. Due to the water ring pump gas compression is the isothermal of pumping inflammable, explosive gas, moreover also can pump the dust, water, gas, water ring pump applications. In the pump body is equipped with the right amount of water as the working fluid. When the impeller press figure with clockwise, the water was thrown around the impeller, due to the centrifugal force of water forming a decision in the pump Chamber shape similar to a closed circle, such as thickness. The water's surface in the next section and the impeller hub precisely, the upper portion of the tangent to the inner surface of the water just leaves the top contact (actually leaves in the water in the depth of insertions). At this point between the impeller hub and the water forms a crescent-shaped space, this space was divided into a number of blade impeller and equal to the number of small cavities. If the lower portion of the impeller 0 ° is the starting point, then the front impeller rotation 180 ° small cavity volume by little larger, and with the end of the suction port, where gas is inhaled, the suction at the end of the small cavity and inspiratory port isolation; continue to rotate when the impeller, the small cavity by smaller, so that the gas is compressed; when a small cavity and exhaust air, gas is discharged from the pump. To sum up, the water ring pump by pump cavity volume changes for suction, compression and exhaust, it belongs to the variable capacitor type vacuum pumps. Roots pump works a roots pump cavity, a second "8"-shaped rotor perpendicular to install in a pair of parallel shaft gear ratio of 1, a pair of gears with action each other reverse synchronization rotational movement. In between the rotor and rotor pump shell wall, maintain a clearance, you can realize high speed running. Because of the roots pump is a vacuum pump without compression, typically a very low compression, high, medium vacuum pumps need the fore pump. Roots of ultimate vacuum subject depending on the pump itself structures and manufacturing precision, but also depends on the fore pump of ultimate vacuum. In order to increase the limit vacuum pumps, roots pump used in series. Roots pump works with similar roots blower. Due to the constant rotation of the rotor was pumping gas from intake to the rotor and the space between v0 pump shell, then by exhaust emissions. Because the suction after v0 space is closed, therefore, in the pump cavity gases no compression and expansion. But when the rotor turns the vent on the top edge, v0 space and exhaust side is same, as the exhaust side of the gas pressure is high, it is part of the gas back to space v0, the gas pressure suddenly increased. When the rotor to turn, gas discharge pumps. Rotary vacuum pump working principle of rotary vacuum pump (hereinafter referred to as rotary vane pump) is a species of seal mechanical vacuum pump. Its working pressure range 101325 ~ 1.33 × 10-2 (Pa) belong to low vacuum pump. It can be used alone or as other high vacuum or ultra high vacuum pump of the fore pump. It has been widely used in metallurgy, machinery, military industry, electronics, chemical industry, light industry, petrochemical and pharmaceutical, manufacturing and research sectors. Rotary vane pump can pump the seal container in a dry gas, appliance if accompanied by a gas town, you can pump the certain amount of coagulated gases. But it does not apply to pump the oxygen too high, there are corrosive to metals, on the pump oil will react and gas containing particles of dust. Rotary vane vacuum pump is the most basic technology of vacuum production equipment. Rotary vane pump for small and medium-sized pump. There is a single-stage rotary vane pumps and dual-stage two. The so-called dual-stage, is in structure of two-stage pump-line up. How to make dual-generally to obtain higher vacuum. Rotary vane pump's suction inlet pressure relationships as follows: the entrance pressure for 1333Pa, 1.33Pa and 1.33 × 10-1 (Pa), the pumping speed values shall be not less than the nominal pumping speed of the pump's 95%, 50% and 20%. Rotary vane pump mainly consists of pump, Rotary, rotary vane, end cap, springs, etc. In rotary vane pump cavity eccentricity to install a cylindrical rotor, rotor and pump cavity surface tangent (both have very small clearance), rotor tank fitted with a spring of second Rotary. Rotates, by centrifugal force and spring tension makes rotary vane pump Chamber at the top and maintain contact with the inner surface of the rotor rotary vane pump cavity wall sliding along. Two rotary vane pump Chamber, the rotor, and two cover the surrounding of Crescent space separated into A, B, C three, when the rotor rotation direction of the arrow, and the suction portWith A volume of space is gradually increasing and it is in the process of breathing. While communicating with the exhaust volume space C is gradually reduced, is in a outlet process. Center of space B volume is gradually reduced, is in the compression process. Due to the volume of A space is gradually increasing (the expansion), gas pressure reduction, pump entrance exterior gas pressure is greater than the pressure within A space, so the gas inhalation. When space is isolated from A mouth with suction, which go to the location of the space B, start being compressed gases, volume are shrinking, finally and vent. When compressed gases over exhaust pressure, discharge valve are compressed gases, gas through the gasoline tank pushed open the oil drain to the atmosphere. Continuous operation of the pump, the purpose of achieving continuous ventilation. If the exhaust gas through gas road and turn into another level (low vacuum), from low vacuum-pumping away, then by a low vacuum-compression back to the atmosphere, which is composed of a double-stage pumps. At this time the overall compression ratio by levels to burden, improving limited vacuum.