Tool and method for machining a dovetail
a technology of dovetails and tools, applied in the field of dovetails, can solve the problems of non-uniform wear of wheel dovetails during operation, large wear of various components of wheel dovetails, and the cavity of newly formed buckets may no longer match the non-uniform wheel dovetails
Inactive Publication Date: 2014-05-22
GENERAL ELECTRIC CO
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
The invention is a tool and method for machining a dovetail which includes a plurality of tangs. The tool has a body with a plurality of mount brackets that are connected to the body and positionable in contact with the crush surface of the dovetail. An engagement member is connected to the body and adjustable to force the mount brackets against the crush surface. A machining assembly is connected to the body for machining one of the tangs of the dovetail. The invention enables easier and more efficient machining of dovetails.
Problems solved by technology
During operation of the turbomachine, the various components thereof may be subject to significant amounts of wear.
In particular, wheel dovetails may wear non-uniformly during operation.
Such non-uniform wear can cause various issues when replacing the buckets mounted to the wheel.
For example, the dovetail cavities of newly formed buckets may no longer match the non-uniform wheel dovetails.
However, methods and apparatus for performing such machining are generally inadequate.
For example, hand filing of high spots on a dovetail is inaccurate and time-consuming.
Machining of the dovetail in a lathe is expensive and time consuming.
Method used
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[0023]Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
[0024]FIGS. 1 and 7 illustrate various embodiments of a tool 10 according to the present disclosure mounted to a dovetail 12. The dovetail 12 as shown is a component of a rotor wheel 14 of a turbomachine, such as a steam turbine system or gas turbine system...
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Abstract
Tools and methods for machining a dovetail are disclosed. The dovetail includes a plurality of tangs. In one embodiment, the tool includes a body and a plurality of mount brackets, each of the plurality of mount brackets connected to the body and positionable in contact with a crush surface of the dovetail. The tool further includes an engagement member connected to the body and adjustable such that contact by the engagement member with the dovetail forces each of the plurality of mount brackets against the associated crush surface. The tool further includes a machining assembly for machining one of the plurality of tangs of the dovetail, the machining assembly connected to the body.
Description
FIELD OF THE INVENTION[0001]The present disclosure relates in general to dovetails of, for example, rotor wheels, and more particularly to tools and methods for machining such dovetails.BACKGROUND OF THE INVENTION[0002]Steam turbine and gas turbine systems are examples of turbomachines widely utilized in fields such as power generation. A conventional steam or gas turbine system may include a compressor section and a turbine section, each of which may include various stationary and rotary components. Various airfoil components may be included in the stationary and rotary components. For example, a stationary component may include a plurality of buckets, while a rotary component may include a plurality of vanes.[0003]In many cases, a rotary component or a stationary component may further include a wheel on which the buckets or vanes may be mounted. In typical turbomachines, for example, buckets are disposed in an annular array about a rotor wheel. In many cases, the buckets are mount...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B24B23/08B24B19/08
CPCB24B19/02B24B27/003B24B5/26B24B19/08B24B23/08
Inventor KUDAS, TODD GEORGEMOORE, ROCKY A.
Owner GENERAL ELECTRIC CO