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    Home > Active Ingredient News > Drugs Articles > What to know before removing the vacuum unit of roots rotary vane pump

    What to know before removing the vacuum unit of roots rotary vane pump

    • Last Update: 2019-07-17
    • Source: Internet
    • Author: User
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    Between the vacuum unit of roots rotary vane pump and the distillation system, it is necessary to pay attention to the installation of absorption device; before distillation, the steam of organic solvent in the system must be completely pumped out with a water pump; if it is possible to pump air, the water pump should be used as far as possible, for example, if the distillation material contains volatile substances, the water pump can be used to reduce the pressure and then the pump can be used   When the vacuum unit of roots rotary vane pump is in use, the constant change of the volume in the cavity will directly form the exhaust effect, which requires that the lubricating oil should have proper viscosity and viscosity temperature characteristics; the pressure reducing system on the vacuum unit of roots rotary vane pump must be kept tight without air leakage, all rubber plugs should be of proper size and channels, and rubber tubes should be vacuum tubes Rubber tube used Apply vacuum grease to the ground glass When the vacuum unit of roots rotary vane pump is disassembling and repairing the pump, take out the rotor and the rotary vane First of all, it should be noted that there must be two stabbing daggers on the end of the low rotor, which can be easily pulled out by screwing into the dagger with a screw rod However, when the vacuum unit of roots rotary vane pump is disassembled, it must also be noted that when pulling out the rotor, the rotary vane must be pinched by hand Due to the large spring force on the rotary vane on the vacuum unit of roots rotary vane pump, it is easy to fly out of hand accidentally, fall on the ground or touch hard objects, damage the edge angle and surface of the rotary vane, resulting in an unprovoked scrap When disassembling the high vacuum end, pay attention to take out the high rotor and rotor At this time, the rotor can be taken out just by holding the rotor and shaft tightly Of course, before removing the vacuum unit of roots rotary vane pump, we should also pay attention to understand the structural characteristics of the removed and repaired pump in advance as well as the structural type of each component For example, for those parts which belong to the assembly, if the rotor of some rotary vane pump, etc., it is not necessary to disassemble, and its surface can be properly modified and adjusted If glass chips fall into the combined rotor, the cavity is damaged by metal foreign matters, or the spiral groove itself is worn too much, it can also be disassembled when parts need to be repaired and replaced, but the assembly method should be carefully remembered When the vacuum unit of roots rotary vane pump is disassembled and repaired, it is necessary to check the accuracy, finish and damage of each disassembled part Pay special attention to check whether the parts of the rotary vane and the edges and corners of both ends of the rotor are damaged, and make records.
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