Patent ID: 6116858
Filing Date: 2000-09-12
Classification: B01F,B05B,B08B

Abstract:
A jet finishing machine comprising:a water nozzle portion for spouting a water jet flow of water in a liquid phase;a steam nozzle portion for increasing the speed of a steam flow in a gas phase to a supersonic speed to produce a steam jet flow, an inner wall of said steam nozzle portion and an outer wall of said water nozzle portion being formed so as to form a converging-diverging nozzle; anda mixing nozzle portion for mixing the annulus steam jet flow condensing onto the water jet flow to accelerate the water jet flow and to form a two-phase jet flow and for directly spouting the two-phase jet flow impinging onto a work piece, said mixing nozzle portion having a tapered conical shape which is converging to a direction distal from the water nozzle portion and toward a tip of the mixing nozzle portion open to the work piece,wherein a flow passage area in a minimum cross section taken along planes perpendicular to the axis of said water nozzle portion and said steam nozzle portion is set to be greater than a value below which substantially the entire steam jet flow condenses into a liquid, andwherein a flow rate of steam flow supplied to said steam nozzle portion is greater than a flow rate below which substantially the entire steam jet flow condenses into a liquid, the flow rate of steam flow supplied to the steam nozzle portion being controlled by a steam supply nozzle connected with the steam nozzle.