Gas-liquid two-phase mixed low-temperature nitrogen gas jet flow generation apparatus

Abstract

The present invention discloses a gas-liquid two-phase mixed low-temperature nitrogen gas jet flow generation apparatus, which comprises a self-pressurization liquid nitrogen supply system, a high-pressure-resistant low-temperature soft pipe, a reciprocating low-temperature pressurization pump, a room-temperature nitrogen gas supply system, a high-pressure-resistant room-temperature soft pipe, an inner mixing chamber, an interception valve, a three-way valve and a spraying nozzle, wherein the self-pressurization liquid nitrogen supply system outputs low-pressure liquid nitrogen, the low-pressure liquid nitrogen is pressurized through the reciprocating low-temperature pressurization pump, the obtained high-pressure liquid nitrogen is output to the inner mixing chamber, the room-temperature nitrogen gas supply system outputs room-temperature and high-pressure nitrogen gas and conveys the high-pressure nitrogen gas to the inner mixing chamber, the high-pressure liquid nitrogen and the room-temperature and high-pressure nitrogen gas form low-temperature nitrogen gas in the inner mixing chamber, and the low-temperature nitrogen gas is conveyed to the three-way valve and the spraying nozzle to form the low-temperature nitrogen gas jet flow. According to the present invention, the flow rates and the ratio of the low-temperature liquid nitrogen and the room-temperature nitrogen gas are controlled, such that the adjustable low-temperature nitrogen gas jet flow temperature from the room temperature to -196 DEG C can be achieved, and the jet flow pressure and the jet flow rate can be adjusted.

Description

technical field [0001] The invention relates to a low-temperature gas generator, in particular to a gas-liquid two-phase flow mixed low-temperature nitrogen jet generator. Background technique [0002] Entering the 21st century, advanced cutting technologies characterized by precision, high efficiency, low cost, and green, such as high-speed cutting, high-efficiency cutting, high-performance cutting, and powerful composite cutting, are being promoted and applied all over the world. However, during the cutting process, the high temperature, high pressure, and high-frequency impact of the tool / worker friction contact area pose severe challenges to the performance of the tool. The sharp wear of the tool is often a key factor restricting the application of advanced cutting technology. A large number of research and application examples show that reasonable and effective cooling and lubrication methods can improve the knife / worker friction state and inhibit tool wear, thereby imp...

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Problems solved by technology

[0007] The problem solved by the present invention is the problem that the existing technology cannot realize coordinated control of the temperature, flow and pressure of the cryogenic gas jet

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