Plasma spray apparatus
AssigneeShimazu Kogyo Yugenkaisha
InventorTadahiro Shimazu
Life of this patent
Estimating the term…
Abstract
To provide a plasma spray apparatus, having a reduced number of jet ports for the working medium transformed into plasma, resulting in a simplified structure thereof, and even when the trajectory of the working medium becomes misaligned, the apparatus remains capable of producing a plasma flame that can properly melt the spray material; thus, the spray material can be used effectively. Two jet paths in the plasma spray apparatus are formed at both sides of one supply port for spray material 17 and are arranged so that the axial directions cross each other at the outside of the nozzle anode 11; two cathodes 13 are disposed inside the two jet paths 12; and the openings of the jet paths 12 are formed into elongated holes so that the center lines thereof are parallel to each other and the areas thereof are the same.
Claims29
A plasma spray apparatus, comprising:
- a nozzle anode that communicates with a working medium path which is adapted to accommodate a working medium;
- a jet port formed as an elongated hole in communication with the working medium path;
- a cathode in communication with the working medium path, wherein the nozzle anode and cathode are operable to convey an electrical arc there between to transform the working medium into plasma to form a plasma flame that is ejected as a lingual-shaped plasma flame from the jet port;
- and
- a spray material supply port for supplying spray material directed toward the plasma flame to melt and accelerate the spray material.
A plasma spray apparatus, comprising:
- a nozzle anode that communicates with a working medium path which is adapted to accommodate a working medium;
- a cathode that communicates with the working medium path;
- a dual-array of jet ports consisting of only two jet ports that communicate with the working medium path;
- wherein the nozzle anode and cathode are operable to convey an electrical arc there between to transform the working medium into plasma to form plasma flames ejected from the jet ports;
- and
- a spray material supply port for supplying spray material into the plasma flames to melt and accelerate the spray material.
A plasma spray apparatus, comprising:
- a nozzle anode that communicates with a working medium path which is adapted to accommodate a working medium;
- a cathode disposed at an inner side of the nozzle anode that communicates with the working medium path;
- at least one jet port in communication with the working medium path, said jet port formed as an elongated opening, whereby when an electrical arc is formed between the nozzle anode and cathode a working medium is transformed into plasma to form a lingual-shaped plasma flame that is ejected from the jet port;
- and
- spray material supply means for supplying spray material into the plasma flame to melt and accelerate the spray material.
A plasma spray apparatus, comprising:
- a nozzle anode defining an elongated jet path that communicates with a working medium path which is adapted to accommodate a working medium;
- a cathode separated from the nozzle anode by the working medium path, wherein the nozzle anode and cathode are operable in connection with electric current supply means to generate an electrical arc to transform the working medium into plasma to form a plasma flame that is ejected from the jet path;
- and
- a spray material supply mechanism to direct spray material toward the plasma flame to melt and accelerate the spray material.
A plasma spray apparatus, comprising:
- a nozzle anode that communicates with a working medium path which is adapted to accommodate a working medium;
- a cathode that communicates with the working medium path;
- two elongate jet port openings aligned with one another so that longitudinal midlines of the openings are approximately parallel to one another;
- and
- a spray material supply port located between the two elongate jet ports.
Dependencies are inferred from the claim text.