Why can't the working head of the vacuum emulsifier run dry

- Feb 22, 2021-

High-shear vacuum emulsifier is the process of efficiently, quickly and evenly bringing one phase or multiple phases (liquid, solid, gas) into another immiscible continuous phase (usually liquid). The principle is the strong kinetic energy brought by the high tangential speed and high-frequency mechanical effect generated by the high-speed rotation of the rotor, so that the material is subjected to strong mechanical and hydraulic shear, centrifugal extrusion, and liquid layer friction in the narrow gap between the stator and the rotor. , Impact tearing and turbulence, etc., to form suspension (solid/liquid), emulsion (liquid/liquid) and foam (gas/liquid). The part where the emulsification head connects with the stator is equipped with copper sleeve bearings or bearings of other materials. The speed of the drive shaft is generally 3600rpm. Due to the relative high-speed movement between the copper sleeve and the drive shaft, the friction will generate high temperature. If there is no lubricant between the copper sleeve and the shaft, the copper sleeve and the shaft will expand due to the high temperature, thereby locking the copper sleeve and the shaft. Will be scrapped because of comparison. When the emulsifying head is immersed in the solution, the solution will enter the gap between the copper sleeve and the bearing, thereby providing lubrication.


We often specify in the operating instructions or warning signs of the vacuum emulsifier: the vacuum emulsifier is strictly prohibited from idling, and the emulsifying head must be immersed in the solution.