Expander Refrigeration Low Temperature Cooling Nano Particle Jet MQL Supply System

Abstract

The invention discloses an expander refrigeration low-temperature cooling nano-particle jet micro-lubrication supply system, including an expander, which performs approximately isentropic expansion and cooling of the compressed gas passing into it to form low-temperature cold air; a nano-fluid micro-lubrication supply system, which includes a pump Body, camshaft and piston, the camshaft is connected with the electromagnetic speed-regulating motor; the electromagnetic speed-regulating motor is used to drive the camshaft to rotate and then drive the pump body and the piston to periodically move relative to each other, and then transport the nanofluid into the oil pipeline; external mixing The nozzle includes a nozzle gas inlet pipe and a nozzle needle. The oil delivery pipe extends into the nozzle gas inlet pipe. An insulation pipe is arranged between the oil delivery pipe and the nozzle gas inlet pipe. Low-temperature cold air is introduced between the insulation pipe and the nozzle gas inlet pipe; the nozzle needle One end is connected to the oil delivery pipe, and the other end of the nozzle needle extends outward to the outside of the outer mixing nozzle; the nanofluid in the oil delivery pipe is sprayed out from the nozzle needle, and then mixed with the low-temperature cold air sprayed out of the outer mixing nozzle and then atomized.

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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