Ceramic coating composition for compressor casing and methods for forming the same
a coating composition and compressor technology, applied in the direction of liquid fuel engine components, pump components, non-positive displacement fluid engines, etc., can solve the problems of loss of efficiency, damage or destruction of the blade set, metal blade tip melting or softening,
Inactive Publication Date: 2018-05-17
GENERAL ELECTRIC CO
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention provides a coated compressor casing for a gas turbine engine, where the casing has a coating system made of a ceramic material that is harder than the compressor blade. This coating system can improve the durability and performance of the compressor blade. The coating system can be applied to the inner surface of the compressor casing and can have a uniform thickness across the entire inner surface. The coating system can also include a bond coat and can be used in a turbofan engine. The invention also provides a method for preparing the coated compressor casing.
Problems solved by technology
During engine operation, however, blade tips may rub against the casing, thereby increasing the gap and resulting in a loss of efficiency, or in some cases, damaging or destroying the blade set.
In addition, the high speeds and high contact forces increase the local temperature at the blade tip such that the metal blade tip may melt or soften.
These interactions result in a reduced lifetime of the compressor components.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
examples
[0053]The feasibility of this concept has been demonstrated with experiments using blade and casing coupons. FIGS. 5a, 5b, and 5c illustrate the rubbing of a conventional compressor blade and casing. In particular, FIG. 5a illustrates the casing shoe and blade coupon after a rubbing event, FIG. 5b is another image of the casing shoe after a rubbing event, and FIG. 5c shows the topography of the casing shoe after a rubbing event. A nickel superalloy blade coupon and casing shoe was used to illustrate the rubbing experienced with conventional compressor systems. FIGS. 6a, 6b, and 6c illustrate the rubbing of a compressor blade and casing in accordance with one embodiment of the present invention. In particular, FIG. 6a illustrates the casing shoe and blade coupon after a rubbing event, FIG. 6b is another image of the casing shoe after a rubbing event, and FIG. 6c shows the topography of the casing shoe after a rubbing event. In this embodiment of the coating system, a nickel superallo...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
Coating systems for components of a gas turbine engine, such as a compressor casing, are provided. The coating system can include a ceramic material disposed along the compressor casing on a surface to be adjacent to a rotating compressor blade. The coating system is harder than the compressor blade and can reduce the rub ratio between the casing and blade. The coating system can thereby increase the lifetime of the compressor casing and blades. Methods are also provided for applying the coating system onto a compressor casing.
Description
FIELD[0001]Embodiments of the present invention generally relate to ceramic coating systems for metallic components, particularly for use on a compressor casing in a gas turbine engine.BACKGROUND[0002]Gas turbine engines typically include a compressor for compressing air. The compressor includes a series of stages of blades rotating around a shaft. The compressed air is mixed with a fuel and channeled to a combustor, where the mixture is ignited within a combustion chamber to generate hot combustion gases. The combustion gases are channeled to a turbine. The turbine section of a gas turbine engine contains a rotor shaft and one or more turbine stages, each having a turbine disk (or rotor) mounted or otherwise carried by the shaft and turbine blades mounted to and radially extending from the periphery of the disk. A turbine assembly typically generates rotating shaft power by expanding hot compressed gas produced by the combustion of a fuel. Gas turbine buckets or blades generally ha...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): F04D29/02F04D29/38
CPCF04D29/388F04D29/023F04D29/526F05D2300/20
Inventor SARAWATE, NEELESH NANDKUMARLEBLANC, LUC STEPHANERAGHAVAN, SATHYANARAYANANSUN, CHANGJIEBARUA, ANANDA
Owner GENERAL ELECTRIC CO