DEVICE FOR SUPPLYING SUBCOOLED LIQUID CRYOGEN TO CUTTING TOOLS

摘要

A method for subcooling liquid cryogen that is used by a cutting tool uses the steps of dividing liquid phase cryogen between a subcooler feed line and tool feed line. The cryogen in the subcooler feed line is expanded to lower the pressure and decrease the temperature of the cryogen, and the expanded liquid cryogen from the subcooler feed line is added to the interior of a subcooler. A heat exchanger is positioned in the subcooler in contact with the expanded liquid cryogen. The cryogen in the tool feed line is subcooled below its saturation temperature by passing the cryogen through the heat exchanger, and the subcooled cryogen from the heat exchanger is supplied to the cutting tool. As a result, the subcooled cryogen supplied to the cutting tool is substantially 100% liquid cryogen without any vapor content.

主权项

1. A method for subcooling liquid cryogen that is used by a cutting tool, the method comprising the steps of:
supplying liquid cryogen to a subcooler; dividing liquid cryogen between a subcooler feed line and tool feed line; expanding the cryogen in the subcooler feed line to lower the pressure and decrease the temperature of the cryogen; adding the expanded liquid cryogen from the subcooler feed line to the interior of a subcooler; positioning a heat exchanger in the subcooler in contact with the expanded liquid cryogen; subcooling the cryogen in the tool feed line below its saturation temperature by passing the cryogen through the heat exchanger; and, applying the subcooled cryogen from the heat exchanger to the cutting tool, whereby the subcooled cryogen is substantially 100% liquid cryogen without any vapor content.