Unlock instant, AI-driven research and patent intelligence for your innovation.

Abradable labyrinth tooth seal

Inactive Publication Date: 2007-11-29
SIEMENS ENERGY INC
View PDF16 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]In accordance with one aspect of the invention, a seal assembly is provided for a rotary machine having a stationary portion and a rotatable portion. The seal assembly comprises a first seal member comprising a honeycomb structure, and a second seal member comprising first and second seal surfaces wherein the second seal surface is radially spaced from the first seal surface. The first seal member includes a first seal portion located in facing relationship to the first seal surface to form a seal therebetween, and a second seal portion located in facing relationship to the second seal surface to form a seal therebetween. The first seal portion defines a width in an axial direction of the rotary machine that is less than the width of the second seal portion in the axial direction.
[0007]In accordance with a further aspect of the invention, a seal assembly is provided for a rotary machine having a stationary portion and a rotatable portion. The seal assembly comprises a f

Problems solved by technology

These so called “seal wires” enter the flow path and may cause significant damage to diaphragm airfoils, often resulting in forced outages to repair the damage.
Accordingly, labyrinth seals have generally been designed to allow sufficient clearance to avoid problems associated with contact between the labyrinth teeth and the adjacent seal surfaces, allowing a certain amount of leakage with an associated loss of performance.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Abradable labyrinth tooth seal
  • Abradable labyrinth tooth seal
  • Abradable labyrinth tooth seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013]In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration, and not by way of limitation, a specific preferred embodiment in which the invention may be practiced. It is to be understood that other embodiments may be utilized and that changes may be made without departing from the spirit and scope of the present invention.

[0014]Further, although the present invention may be applicable to variety of rotary machinery, such as gas or steam turbines, compressors, etc., it will be described with reference to a gas turbine engine 10, a portion of which is illustrated in FIG. 1. In particular, the portion of the gas turbine engine 10 illustrated in FIG. 1 comprises a compressor portion of the turbine engine 10.

[0015]FIG. 1 illustrates two compressor blades 12, 14 connected to respective rotor disks 16, 18 of a rotor assembly supported for rotation about a rotati...

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

No PUM Login to View More

Abstract

A seal assembly (52, 54) for a gas turbine engine (10). The seal assembly (52, 54) includes a first seal member (40) including an abradable structure having at least first and second seal portions (58, 64) radially spaced from each other, and a second seal member (44) including first and second seal surfaces (56, 62) located in facing relationship to the first and second seal portions (58, 64), respectively. The first seal member (40) is formed of a honeycomb structure, and the first seal portion (58) of the first seal member (40) is a thin fin-like structure having a width in the axial direction of the turbine engine (10) that is less than the width of the second seal portion (64) in the axial direction.

Description

FIELD OF THE INVENTION[0001]This invention relates in general to seals for multistage rotary machines and, more particularly, to a seal assembly in a multistage rotary machine for providing interstage leakage control.BACKGROUND OF THE INVENTION[0002]In various multistage rotary machines used for energy conversion, such as turbines, a fluid is used to produce rotational motion. In a gas turbine, for example, a gas is compressed through successive stages in a compressor and mixed with fuel in a combustor. The combination of gas and fuel is then ignited for generating combustion gases that are directed to turbine stages to produce the rotational motion. The turbine stages and compressor stages typically have stationary or non-rotary components, e.g., vanes, that cooperate with rotatable components, e.g., rotor blades, for compressing and expanding the operational gases.[0003]Any fluid leakage between stages reduces overall gas turbine engine performance and efficiency and therefore, in...

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
no application Login to View More
IPC IPC(8): F16J15/447
CPCF01D11/001F16J15/445F01D11/122
Inventor KOVAC, JOSHUA D.PAPROTNA, HUBERT E.
Owner SIEMENS ENERGY INC