Oil diffusion pump overview
Oil diffusion pump system of steam jet pump is a kind of pump, its working principle is to use the umbrella nozzle pump, at the same time, combined with the oil steam jet pump of the supersonic velocity, oil vapor jet, the velocity will gradually increase, at this time of pump pressure and density will gradually reduce, jet above is pumped gas can differ due to the density of the pressure difference between the formation of steam jet diffusion and jet carrying to the water-cooled wall of pump B, at B, is most steam condensation oil drops along the wall flow back to pump oil recycling, at this point B steam will condense oil drops along the wall flow back to pump oil recycling, At this point, the gas pumped is compressed and accumulated at point B, and finally carried away by the next stage of jet. As a result of this gradual compression, the gas is pumped away by the previous stage of the pump.
Oil diffusion pump and other pump under the influence of different factors, will produce steam reflux, pump wall of oil film and the evaporation of oil droplets, the high-speed oil steam nozzle flow after touching the wall of pump of reflection, the level of the oil film on the surface of the nozzle and the evaporation of oil droplets, the nozzle edge scattering of oil vapor flow of high speed and oil migration along the wall of pump to surface at room temperature. There are also gas molecular counter-diffusion, cracking decomposition of lubricants, pump pollutants and so on.
Such as the above problems, when we use the oil diffusion pump, the relevant auxiliary devices should be added to prevent. For example, increase roots vacuum pump or adopt dual mechanical pump to reduce the pressure of diffusion pump outlet. At the same time, select qualified and effective diffusion oil for lubrication, so as to reduce the above problems.
Daily use and maintenance of oil diffusion pump:
1. Make sure that the cooling water of the pump is unobstructed when working. Remember that the cooling water can be closed only after the heat is generated by the pump.
2. In order to avoid cracking of lubricating oil, keep the pump vacuum after the pump is in standby mode.
3. The oil diffusion pump can only extract dry, non-corrosive and dust-free gas.
4. In case of pump failure or performance degradation, first check whether the pump heater is running normally.
5. For long-term operation and use of pump, long-term maintenance plan should be made, regular maintenance and regular maintenance should be made to increase the service life of pump.