Spray nozzle and method for thermal spraying
AssigneeROLLS-ROYCE plc
InventorsSiddharth LOKACHARI, Tanvir HUSSAIN
Life of this patent
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Abstract
A spray nozzle for thermal spraying a coating material on a substrate includes a central port configured to deliver the coating material along a spray axis in the form of an atomized suspension. The spray nozzle further includes a plurality of gas ports arranged symmetrically and peripherally around the central port with respect to the spray axis. Each gas port is configured to deliver a pressurized combustible gas for entraining the coating material after the coating material has exited the central port. The pressurized combustible gas is configured to heat the coating material in a heating zone for generating a heated gas stream. The heated gas stream is directed toward a target surface of the substrate.
Claims16
A spray nozzle for thermal spraying a coating material on a substrate, the spray nozzle comprising:
- a central port configured to deliver the coating material along a spray axis in the form of an atomized suspension, the central port having an outlet diameter of no greater than 0.75 millimeters;
- and
- a plurality of gas ports arranged symmetrically and peripherally around the central port with respect to the spray axis, wherein each gas port of the plurality of gas ports is configured to deliver a pressurized combustible gas for entraining the coating material after the coating material has exited the central port, the pressurized combustible gas is configured to heat the coating material in a heating zone for generating a heated gas stream, and the heated gas stream is directed toward a target surface of the substrate.
A method for thermal spraying a coating material on a substrate, the method comprising:
- providing a spray nozzle comprising a central port and a plurality of gas ports arranged symmetrically and peripherally around the central port with respect to a spray axis, the central port having an outlet diameter that is no greater than 0.75 millimeters;
- delivering, by the central port, the coating material in the form of an atomized suspension along the spray axis;
- delivering, by the plurality of gas ports, a pressurized combustible gas for entraining the coating material after the coating material has exited the central port;
- heating, by the pressurized combustible gas, the coating material in a heating zone for generating a heated gas stream;
- and
- directing the heated gas stream towards a target surface of the substrate.
Dependencies are inferred from the claim text.