User talk:Vacuum pump

I. summary of 2BV type water ring vacuum pump:

The 2BV water-ring vacuum pump is suitable for pumping gas and steam. The suction pressure can reach 33 mbar absolute pressure (97% vacuum degree). When transformer oil is used as working fluid (called oil ring vacuum pump), the suction pressure can reach 6.7 mbar absolute pressure (99.3% vacuum degree), which can completely replace the reciprocating vacuum pump. When the suction pressure of the liquid ring vacuum pump is close to the limit vacuum for a long time, the cavitation protection tube should be connected to protect the pump and eliminate cavitation noise. When used as a compressor, its maximum pressure is 0.26MPa (absolute pressure). When used as a compressor, with the increase of exhaust pressure will cause the increase of 2BV pump power, the order should be marked exhaust pressure to select the appropriate motor power.

As a new generation of energy-saving products, 2BV water-ring vacuum pump will replace SK, 2SK series water-ring vacuum pump and W, WY, WL series reciprocating vacuum pump with excellent performance and many advantages. 2BV2-Ex and 2BV6 series water-ring vacuum pumps/compressors are mainly used for extracting explosive gases and working in various flammable and explosive environments. Their performance parameters are the same as those of 2BV2 and 2BV5 series. 2BV series stainless steel vacuum pump can be used in all kinds of corrosion-resistant occasions and cleanliness requirements of higher occasions. According to the working condition of 2BV series stainless steel vacuum pump, all over-flow parts: pump body, pump cover, disk, impeller material can be selected SUS304 (0Cr18Ni9), SUS316 (0Cr17Ni12Mo2), SUS316L (00Cr17Ni14Mo2) and other stainless steel materials, pump shaft material: 2Cr13 or 0Cr18Ni12Mo2Ti.

The mechanical seal of 2BV water ring vacuum pump adopts imported products, and the seal can be made of fluororubber or polytetrafluoroethylene.

Compared with the same type of water ring vacuum pumps, such as SK, 2SK and SZ, they have the following characteristics:

1.The coaxial type direct connection design of 2BV type water ring vacuum pump pump saves space and is easy to install. 2.The 2BV type water ring vacuum pump adopts all imported mechanical seals as the standard configuration. 3.2BV type water ring vacuum pump is equipped with cavitation protection pipe interface. If working under extreme pressure, opening the cavitation protection pipe interface (or connecting with the separator) can eliminate cavitation sound and protect the 4.pump under the condition of guaranteeing the suction effect to the maximum extent. 5.Aluminum bronze impeller has high strength and durability, and improves the corrosion resistance of the 2BV type water ring vacuum pump. If the overcurrent parts are made of stainless steel, they can work in a more demanding environment. 6.The unique design of flexible exhaust port will not produce over-compression, which ensures that the 2BV water-ring vacuum pump has the best efficiency in its performance range. 7.All Y2 series motors are adopted, with protection level IP54 and IP55 (usually IP44). 8.2BV type water ring vacuum pumps are all imported with NTN or NSK bearings. ''' The working principle of 2BV type water ring vacuum pump is as follows: ''' The impeller 3 of the 2BV type water ring vacuum pump is eccentrically installed in the pump body and injects a certain height of water into the pump when starting. Therefore, when the impeller 3 rotates, the water forms a rotating water ring 1 on the inner wall of the pump body under the action of centrifugal force. The inner surface of the water ring is tangent to the hub and rotates along the arrow direction. The inner surface of the water ring of V-type water ring vacuum pump gradually separates from the hub, so a closed space is formed between the impeller blades and the water ring. With the rotation of the impeller, the space expands gradually, the space gas pressure decreases, and the gas is sucked in from the disk suction port. In the latter half of the rotation, the inner surface of the water ring is gradually close to the hub and the blades are close to each other. The space gradually shrinks, and the space gas pressure rises. When the pressure is higher than the outlet pressure, the gas between the blades is exhausted from the disc outlet. In this way, the impeller rotates once a week, the space between the blades suction and exhaust once, many of the space is constantly working, 2BV type water ring vacuum pump continuously suction or pressure gas.

The 2BV water ring vacuum pump will heat up the working water ring because of the heat generated by the work during the working process. At the same time, some water and gas are surrounded together. Therefore, in the working process, it must be continuously supplied water to the pump to cool and supplement the water consumed in the pump to meet the working requirements of the pump.

When the gas discharged by the 2BV water-ring vacuum pump is no longer used, a gas-water separator is connected to the exhaust port of the 2BV water-ring vacuum pump. After the exhaust gas and part of the water discharged into the gas-water separator, the gas and water are separated, and the gas is discharged from the exhaust pipe, and the remaining water is supplied to the pump through the return pipe for further use. With the extension of working time, the working water temperature will continue to rise, at this time cold water from the water supply pipe to reduce the temperature of working water to ensure that the pump can meet the required technical requirements and performance indicators.

When the 2BV water-ring vacuum pump is used as a compressor, the pump outlet is connected with a gas-water separator, the gas-water mixture enters the gas-water separator and automatically separates, the gas is conveyed to the required system by the exhaust pipe, and the working water enters the 2BV water-ring vacuum pump through the separator. Compressed gas, the working water is very easy to heat, water from the pump outlet, the temperature will become higher, to supply cold water by the water supply pipe, to supplement the water discharged, while playing a cooling role, so that the working water temperature will not be too high, so as to ensure the compressor performance, meet the technical specifications, meet the technical requirements.

'''Installation instructions and installation dimensions of 2BV type water ring vacuum pump: ''' Type 2BV water-ring vacuum pump and compressor system consists of vacuum pump (compressor), motor, gas-water separator pipeline. The working process of 2BV water-ring vacuum pump and compressor and gas-water separator is as follows: gas enters 2BV vacuum pump or compressor through pipeline through valve, then enters gas-water separator through exhaust pipe, and then discharges through gas-water separator exhaust pipe. When used as a compressor, the mixture of gas and water discharged by the compressor is separated in the gas-water separator, and the gas is transported through the valve to the system requiring compressed gas. The working water in the 2BV water-ring vacuum pump or compressor is discharged from the gas-water separator without cooling to the vacuum pump for reuse. The rest of the working water is supplemented by the water supply pipe. The water supply is adjusted by the valve on the water supply pipe.

The difference between the gas suction and the pressure feeding system is only that the internal structure of the gas water separator is different. When pumping gas, the suction inlet pressure is lower than atmospheric pressure, and the exhaust outlet pressure is equal to atmospheric pressure, the gas-water separator has overflow pipe; when pressurizing gas, the suction inlet is atmospheric pressure (or vacuum state), the exhaust outlet pressure is higher than one atmospheric pressure, in order to ensure the transmission of gas pressure, the water level of the gas-water separator through the overflow switch. Control.