US 9,427,771 B2 · Method for forming coating on scroll type fluid machine

Abstract

An orbiting scroll is fixed on a rotating table and rotated about a spiral center. A spray nozzle is positioned in the spiral center or at an outside end of the orbiting scroll and caused to discharge a coating toward a side face of a wrap portion. The spray nozzle is moved along a straight line in a radial direction while discharging the coating. When a spraying start position is set as the spiral center, a rotation angle speed of the orbiting scroll is gradually reduced in accordance with the movement of the spray nozzle. When the spraying start point is set as the outside end, the rotation angle speed of the orbiting scroll is gradually increased in accordance with the movement of the spray nozzle. As a result, the coating can be applied to the wrap portion side face evenly.

Claims5

Dependent claims

A method of forming a coating on a scroll type fluid machine, in which a coating is formed on a side face of a spiral wrap portion of the scroll type fluid machine by spraying a coating solution onto the side face using a spray nozzle, said method comprising:

fixing a scroll constituted by (i) the wrap portion and (ii) an end plate to a rotating table and rotating the scroll about a spiral center of the wrap portion;
moving the spray nozzle in a radial direction of the scroll while spraying the coating solution from the spray nozzle onto only the side face of the wrap portion of the rotating scroll;
and
keeping a coating thickness of the coating solution constant by adjusting a rotation speed of the scroll in accordance with a radial direction movement of the spray nozzle.

1 more element

Dependencies are inferred from the claim text.

Method for forming coating on scroll type fluid machine

Life of this patent

Method for forming coating on scroll type fluid machine

Life of this patent

Abstract

Claims5