Method for producing a protective layer for a rotor blade
a protective layer and rotor blade technology, which is applied in the direction of wind motor components, non-positive displacement fluid engines, liquid fuel engine components, etc., can solve the problems of limiting the life of the entire rotor blade, premature corrosion of the wear tip wall, and more susceptible to high thermal loading, so as to achieve good protection and simple workability and machinability.
Inactive Publication Date: 2013-12-12
SIEMENS AG
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- Application Information
AI Technical Summary
Benefits of technology
The invention provides a new way to make a protective layer for a rotor blade that can make the blade last longer and keep it simple to insulate from heat.
Problems solved by technology
However, by being thinner, the wear tip wall is more susceptible to the high thermal loading due to the hot combustion gas.
This can lead to premature corrosion of the wear tip wall, limiting the life of the entire rotor blade.
Method used
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[0029]In all figures, identical parts are given the same reference signs.
[0030]FIG. 1 shows the upper region of a rotor blade 1, the rotor blade tip 2, in profile according to the prior art. The rotor blade tip 2 is exposed to increased wear due to thermal expansion, rotation induced centrifugal forces and other influences. In order to avoid damage to the rotor blade tip 2 caused by contact with the adjacent internal wall (not shown) of a turbomachine, and to allow controlled abrasion, the rotor blade tip 2 has a wear tip wall 4. The wear tip wall 4 extends the outer profile of the rotor blade 1 radially and thus forms a recess 6 above the rotor blade tip 2.
[0031]This recess 6 is exposed to particular thermal and mechanical loads and should therefore be provided with a protective layer, as shown in the following figures.
[0032]A profile 8 is first introduced to the inside of the wear tip wall 4, i.e. into the recess 6, as shown in FIG. 2. This profile can be either cast directly or i...
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Abstract
A method for producing a protective layer for a rotor blade of a turbomachine is proposed. The rotor blade has a wear cap wall that in relation to the axis of the turbomachine protrudes radially towards the exterior of the turbomachine beyond a body of the rotor blade. The method enables the entire rotor blade to have a comparatively long service life and at the same time allows the wear cap wall to be thermally insulated in an especially simple manner. For the purpose, a profile producing a positive fit effective in the radial direction is inserted in a radially located region of the wear cap wall, a slip containing metal powder and / or a ceramic slip is applied to the region and the slip in sintered.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the US National Stage of International Application No. PCT / EP2011 / 074282 filed Dec. 30, 2011 and claims benefit thereof, the entire content of which is hereby incorporated herein by reference. The International Application claims priority to the European application No. 11155382.2 EP filed Feb. 22, 2011, the entire contents of which is hereby incorporated herein by reference.FIELD OF INVENTION[0002]The invention relates to a method for producing a protective layer for a rotor blade of a turbomachine, having a wear tip wall projecting toward the outside of the turbomachine beyond a body of the rotor blade in the radial direction with respect to the axis of the turbomachine. It further relates to a rotor blade of this type.BACKGROUND OF INVENTION[0003]Turbomachines encompass generally continuously working fluid energy machines such as compressors, steam turbines and gas turbines. A gas turbine converts energy from a hot ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01D5/14
CPCF01D5/147B22F7/04B28B19/0015F01D5/20F01D5/288F01D11/125F05D2230/22F05D2230/90C23C28/042C23C28/044C23C28/42Y10T29/49337Y02T50/60
Inventor AHMAD, FATHIPAUL, UWE
Owner SIEMENS AG