Electrostatic nozzle and controllable jet minimal quantity lubrication grinding system

A micro-texture electrostatic nozzle, comprising a nozzle core, wherein an upper nozzle body is connected above the nozzle core;

• a free space is formed between the upper nozzle body and the nozzle core for storing compressed air and reducing pressure;
• a lower nozzle body is connected below the nozzle core;
• a gas-liquid mixing chamber, an acceleration chamber and a nozzle outlet are sequentially arranged inside the nozzle core from top to bottom in a predetermined direction;
• and a plurality of micro-bulges are uniformly distributed on an inner wall of the acceleration chamber, wherein each of the micro-bulges comprises,
• a body that is mounted to the inner wall of the acceleration chamber and extends in an axial direction from the inner wall of the acceleration chamber, wherein the body of each of the micro-bulges has a cross-sectional area,
• at least one projection mounted to and extending from the body, wherein the at least one projection has a cross-sectional area, and
• wherein a ratio of a sum of the cross-sectional areas of each body of the micro-bulges that are uniformly distributed on the inner wall of the acceleration chamber and a surface area of the inner wall of the acceleration chamber is 40%;
• wherein a ratio of a sum of the cross-sectional areas of all projections mounted to and extending from each body of the micro-bulges and the sum of the cross-sectional areas of each body of the micro-bulges is 50%;
• wherein a contraction angle α of an acceleration chamber is between 5-20°, a diameter of the nozzle outlet is B, a length of the nozzle outlet is L, and a value of L/B is from 2 to 6.