Expansion machine refrigeration subcooling and nano particle jet flow minimal quantity lubrication supply system

Abstract

The invention discloses an expansion machine refrigeration subcooling and nano particle jet flow minimal quantity lubrication supply system. The system comprise an expansion machine, a nano fluid minimal quantity lubrication supply system and an outer mixing nozzle, wherein the expansion machine is used for conducting isentropic expansion cooling on compressed air introduced into the expansion machine so as to form low-temperature cold air; the nano fluid minimal quantity lubrication supply system comprises a pump, a camshaft and a piston, and the camshaft is connected with an electromagnetic speed-adjustable motor; the electromagnetic speed-adjustable motor is used for driving the camshaft to rotate so as to drive the pump and the piston to move periodically and oppositely, and accordingly nano fluid is conveyed into an oil conveying pipe; the outer mixing nozzle comprises a nozzle gas inlet tube and a nozzle spraying needle, the oil conveying tube stretches into the nozzle gas inlet tube, a thermal insulation tube is arranged between the oil conveying tube and the nozzle gas inlet tube, and the low-temperature cold air is introduced into the thermal insulation tube and the nozzle gas inlet tube; one end of the nozzle spraying needle communicates with the oil conveying tube, and the other end of the nozzle spraying needle outwards extends out of the outer mixing nozzle; and the nano fluid in the oil conveying tube is sprayed out of the nozzle spraying needle and atomized after being blended with the low-temperature cold air sprayed out of the outer mixing nozzle.

Description

technical field [0001] The invention relates to a grinding medium supply system in the field of refrigeration and mechanical processing, in particular to an expander refrigeration low-temperature cooling nano-particle jet micro-lubrication supply system. Background technique [0002] Nano particle jet micro-lubrication grinding process is a kind of grinding process technology which is green, environment-friendly, clean and energy-saving. Based on the enhanced heat transfer theory that the heat transfer capacity of solid is greater than that of liquid, and the heat transfer capacity of liquid is greater than that of gas, a certain amount of nano-scale solid particles are added to degradable trace lubricating oil to generate nano-fluid, and the nano-fluid is atomized by high-pressure air , and sent into the grinding area in the form of a jet. The high-pressure air mainly plays the role of cooling, chip removal and conveying fluid; the micro-quantity lubricating oil mainly pla...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the micro-lubrication device and the low-temperature gas generating device of the micro-quantity lubrication system are only assembled on a certain basis, and no in-depth improvement has been made from the refrigeration principle and structure.

Moreover, in the prior art, most of the minimum quantity lubrication pumps use pneumatic pumps, and the pneumatic pump needs to be controlled by a gas frequency generator, the frequency provided is limited, and the output power of the pneumatic pump is small. When nanoparticles are added to the lubricating fluid, it will cause The viscosity of the lubricating fluid increases, the fluidity becomes poor, and the pneumatic pump fails to work due to insufficient air supply power

Cryogenic gas generators require a huge amount of compressed air consumption, and in production practice, air compressors not only drive large machine tools such as grinders, but also drive multiple low-temperature gas generators and multiple pneumatic pumps, further increasing the air pressure. Compressor operating burden

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