Electrostatic nozzle and minimal quantity lubricating and grinding system for controllable jet

A dual-level composite micro-textured electrostatic nozzle, comprising:

• a nozzle core, an upper nozzle body being connected above the nozzle core;
• an empty space being formed between the upper nozzle body and the nozzle core for storing compressed air and decompression;
• a lower nozzle body being connected below the nozzle core;
• a gas-liquid mixing chamber, an acceleration chamber, and a nozzle outlet being sequentially disposed inside the nozzle core from top to bottom;
• and micro-convex bodies being evenly arranged on an inner wall of the acceleration chamber, the micro-convex bodies comprising a primary micro-convex body and a secondary micro-convex body, the secondary micro-convex body being disposed on the primary micro-convex body.

An electrostatic nozzle for noise reduction and resistance enhancement, comprising:

• a nozzle core, an upper nozzle body being connected above the nozzle core;
• an empty space being formed between the upper nozzle body and the nozzle core for storing compressed air and decompression;
• a lower nozzle body being connected below the nozzle core;
• a gas-liquid mixing chamber, an acceleration chamber, and a nozzle outlet being sequentially disposed inside the nozzle core from top to bottom;
• and micro-convex bodies being evenly arranged on an inner wall of the acceleration chamber, the micro-convex body being in the shape of a tapered strip, and a tapered strip groove being formed between any two tapered strip-shaped micro-convex bodies.

A contact-type electrostatic nozzle with a gradient micro-convex body, comprising:

• a nozzle core, an upper nozzle body being connected above the nozzle core;
• an empty space being formed between the upper nozzle body and the nozzle core for storing compressed air and decompression;
• a lower nozzle body being connected below the nozzle core;
• a gas-liquid mixing chamber, an acceleration chamber, and a nozzle outlet being sequentially disposed inside the nozzle core from top to bottom;
• and micro-convex bodies being evenly arranged on an inner wall of the acceleration chamber, and the micro-convex body being in a transitional non-equal-height structure, that is, a height of the micro-convex body gradually decreasing along a jet motion direction.