Micro-volume lubrication system refers to fuel injection equipment that precisely controls the amount of oil. It is usually divided into external fuel injection and internal fuel injection equipment. The external oil injection device adjusts the lubricating oil and compressed air independently. The compressed air blows the lubricating oil to the cutting edge through high-speed airflow at the nozzle outlet to achieve the lubrication effect.

It consists of cavity wall, upper cover, liquid guide hose, large threaded connecting column, liquid suction device, casing, small threaded connecting column, tee pipe, flow regulating valve, transmission pipe and nozzle. During operation, the compressed gas enters from the compressed gas inlet of the tee tube and flows through the "shrink-expand" hole in the liquid suction device. As the hole cross section becomes smaller, the gas pressure decreases, and the pressure in the chamber is different from the compressed gas inlet. The same everywhere, which causes a pressure difference between the gas in the chamber and the gas at the through hole, so that the lubricant in the chamber flows into the liquid suction device. At this time, by changing the height of the flow adjustment knob, the liquid guide hose can be changed. The flow rate of the lubricant. At the same time, the lubricant in the liquid suction device flows into the transmission pipe under the push of the compressed gas, and flows along the pipe wall to the nozzle. It is atomized under the contraction effect of the nozzle and is sprayed at high speed with the compressed gas. out.