The ash content in the burden of vacuum induction furnace is relatively large, which will volatilize in the process of vacuum pumping and smelting, and the time of air pumping will inevitably be prolonged. In order to compensate for the prolongation of pumping time caused by the small pumping speed of oil ring pump, it is necessary to start Roots pump in the unit as soon as possible. It is necessary to increase the inlet pressure of Roots pump in oil ring unit, a small part of which is adsorbed by the furnace wall, and most of which are discharged into the oil tank of sliding valve pump. Without considering the influence of the difference of volume utilization coefficient between two-blade circular arc cycloid rotor and three-blade circular arc cycloid rotor, the two-blade rotor and three-blade rotor will pollute the oil of the pump under the same central distance and outer diameter of the circular arc. Over time, the pump oil becomes muddy. Because the gap between the pump body and the rotor is very small, the mechanical impurities enter the pump chamber to condense into small blocks, so that the rotor is scratched, forming a through annular groove, thus reducing the ultimate vacuum of the slide valve pump.
Why does Roots water ring vacuum unit need to make up water? What is the purpose of making up water for Roots water ring vacuum unit? Supplementary water for Roots vacuum pump unit can effectively work on gas and improve efficiency. Supplementary water should enter at the highest point of compression chamber at the end of liquid work on gas, so that the unit can obtain sufficient energy, when the next cycle turns around. We can start again.
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