Method for providing turbulation on the inner surface of holes in an article, and related articles
OwnerWayne Hasz, Nesim Abuaf +2inventors
InventorsWayne Hasz, Nesim Abuaf, Robert Johnson, Ching-Pang Lee
Life of this patent
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Abstract
A method of providing turbulation on the inner surface of a passage hole (e.g., a turbine cooling hole) is described. The turbulation is first applied to a substrate which can eventually be inserted into the passage hole. The substrate is often a bar or tube, formed of a sacrificial material. After the turbulation is applied to the substrate, the substrate is inserted into the passage hole. The turbulation material is then fused to the inner surface, using a conventional heating technique. The sacrificial substrate can then be removed from the hole by various techniques. Related articles are also described.
Claims50
A method of providing turbulation on the inner surface of a passage hole, comprising the following steps:
- (a) applying turbulation material to a substrate which is capable of being inserted into the passage hole and being fused to the inner surface of the passage hole;
- (b) inserting the substrate into the passage hole, so that the substrate is adjacent to the inner surface of the passage hole;
- and
- (c) fusing the turbulation material to the inner surface of the passage hole.
A method of providing turbulation on the inner surface of at least one radial cooling hole in a turbine blade formed of a superalloy material, comprising the following steps:
- (i) applying turbulation material to a cylindrical bar formed of a sacrificial material, said bar being capable of being fused to the inner surface of the hole;
- (ii) wrapping a layer of braze material around the bar, covering the turbulation material;
- (iii) inserting the bar into the hole;
- (iv) applying sufficient heat to braze the turbulation material to the inner surface of the hole with the braze material;
- and then
- (v) removing the cylindrical bar by a technique suitable for eliminating the sacrificial material.
An article, comprising:
- (I) a substrate containing at least one passage hole, wherein the passage hole includes an inner surface;
- and
- (II) turbulation material bonded to at least a portion of the inner surface of the passage hole by a bonding agent.
Dependencies are inferred from the claim text.