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US 12,605,803 B2Granted
Method and apparatus for monitoring particle laden pneumatic abrasive flow in an abrasive fluid jet cutting system
AssigneeHypertherm, Inc.
InventorsShijin Zhang, Scott Veenhuizen, Axel Henning
Life of this patent
Estimating the term…
Abstract
An abrasive jet cutting system may include a differential pressure measurement apparatus configured to measure a differential pressure between points in an abrasive supply system. The differential pressure may be used to determine one or more conditions of the jet and the abrasive delivery. The measured differential pressure may be used in a feedback control system, feed forward control system, and/or an alarm or safety system.
Claims20
A liquid jet cutting system;
- comprising:
- an abrasive feed passageway including:
- an abrasive particle inlet configured to receive abrasive material from an abrasive material source, wherein the abrasive particle inlet is held at atmospheric pressure;
- a first measurement port;
- and
- a second measurement port downstream of the first measurement port;
- a pressure transducer coupled to the first and second measurement ports and configured to measure a pressure drop between the first and second measurement ports;
- a processing device operably connected to the pressure transducer and configured to determine a flow rate through the abrasive feed passageway based on data received from the pressure transducer;
- and
- a fluid jet cutting head fluidly connected to the abrasive feed passageway and including:
- an abrasive inlet configured to receive abrasive particles from the abrasive feed passageway;
- a high-pressure fluid inlet configured to receive high-pressure fluid from a high-pressure fluid source and draw a partial vacuum at the abrasive inlet;
- a mixing chamber configured to mix the abrasive particles with the high-pressure fluid;
- and
- an outlet configured to project a high velocity fluid cutting jet including both the abrasive particles and the high-pressure fluid.
12 more elements
A liquid jet cutting system, comprising:
- a hopper held at vacuum pressure;
- an abrasive feed passageway including:
- an abrasive particle inlet configured to receive abrasive material from the hopper;
- a first measurement port;
- and
- a second measurement port downstream of the first measurement port;
- a pressure transducer coupled to the first and second measurement ports and configured to measure a pressure drop between the first and second measurement ports;
- a processing device operably connected to the pressure transducer and configured to determine a flow rate through the abrasive feed passageway based on data received from the pressure transducer;
- and
- a fluid jet cutting head fluidly connected to the abrasive feed passageway and including:
- an abrasive inlet configured to receive abrasive particles from the abrasive feed passageway;
- a high-pressure fluid inlet configured to receive high-pressure fluid from a high-pressure fluid source and draw a partial vacuum at the abrasive inlet;
- a mixing chamber configured to mix the abrasive particles with the high-pressure fluid;
- and
- an outlet configured to project a high velocity fluid cutting jet including both the abrasive particles and the high-pressure fluid.
12 more elements
Dependencies are inferred from the claim text.