Seal Arrangement and Method for Manufacturing a Sealing Body for a Seal Arrangement

Abstract

A seal arrangement and a method for manufacturing a sealing body for a seal arrangement for a turbine engine is disclosed. The seal arrangement seals a gap between a rotor and a stator, and has at least one first seal body preferably assigned to the stator and at least one blade-shaped second seal body preferably assigned to the rotor which co-acts with the or each first seal body. The or each first seal body has a main body and a porous wear component, where the main body and the wear component have a graduated material composition.

1 - 15 . (canceled) 
   
   
       16 . A seal arrangement for a turbine engine to seal a gap between a rotor and a stator, having a first sealing body assigned to the stator and having a blade-shaped second sealing body assigned to the rotor co-acting with the first sealing body, wherein the first sealing body has a main body and a porous wear component and wherein the main body and the wear component have a graduated material composition. 
   
   
       17 . The seal arrangement according to  claim 16 , wherein the main body and the wear element consist of a ferrous based alloy or a nickel based alloy which have an alloy gradient in a region of their surfaces or edge zones with respect to aluminum (Al) and/or chromium (Cr). 
   
   
       18 . The seal arrangement according to  claim 16 , wherein the sealing body and the wear component have an aluminum content of 15% to 35% by weight in a surface area or an edge zone. 
   
   
       19 . The seal arrangement according to  claim 16 , wherein the main body and the wear component have a chromium content of 15% to 35% by weight in a surface area or an edge zone. 
   
   
       20 . The seal arrangement according to  claim 16 , wherein the wear component is configured as a honeycomb sealing body. 
   
   
       21 . The seal arrangement according to  claim 16 , wherein the wear component is configured as a porous material layer. 
   
   
       22 . The seal arrangement according to  claim 21 , wherein the wear component is configured as a powder metal sintered body. 
   
   
       23 . The seal arrangement according to  claim 16 , wherein the blade-shaped second sealing body is configured as a seal fin from a solid metal material. 
   
   
       24 . A turbine engine having at least one seal arrangement according to  claim 16 . 
   
   
       25 . A gas turbine aero engine having at least one seal arrangement according to  claim 16 . 
   
   
       26 . A method for manufacturing a sealing body for a seal arrangement, wherein the sealing body has a main body and a porous wear component, comprising the steps of:
 preparation of the main body;   preparation of the porous wear component;   bonding the main body and the porous wear component; and   calorizing and/or chromizing of the bonded main body and porous wear component.   
   
   
       27 . The method according to  claim 26 , wherein the main body and the porous wear component are prepared from a ferrous based alloy or a nickel based alloy. 
   
   
       28 . The method according to  claim 26 , wherein the main body and the porous wear component are bonded by soldering. 
   
   
       29 . The method according to  claim 28 , wherein the main body and the porous wear component are bonded by high-temperature soldering under vacuum. 
   
   
       30 . The method according to  claim 26 , wherein the main body and the porous wear component are bonded by diffusion bonding. 
   
   
       31 . The method according to  claim 26 , wherein the calorizing and/or chromizing is carried out through a CVD process. 
   
   
       32 . The method according to  claim 26 , wherein a layer of 40 μm to 100 μm is created on the main body and a layer of 20 μm to 60 μm is created on the porous wear component in the calorizing and/or chromizing step. 
   
   
       33 . A seal arrangement for a turbine engine, comprising:
 a first sealing body; and   a blade-shaped second sealing body engageable with the first sealing body;   wherein the first sealing body includes a main body and a porous wear component and wherein the main body and the porous wear component have a graduated material composition in a surface area that includes a ferrous alloy or a nickel based alloy, and aluminum and/or chromium in a range of 15-35% by weight.   
   
   
       34 . The seal arrangement according to  claim 33 , wherein the main body has a graduated material composition coating thickness of between 40 μm-100 μm on the surface area and the porous wear component has a graduated material composition coating thickness of between 20 μm-60 μm on the surface area. 
   
   
       35 . A method for manufacturing a sealing body for a seal arrangement, comprising the steps of:
 bonding a main body of the sealing body to a porous wear component of the sealing body; and   calorizing and/or chromizing of the bonded main body and the porous wear component such that a graduated material composition results in a surface area of the bonded main body and the porous wear component that includes a ferrous alloy or a nickel based alloy, and aluminum and/or chromium in a range of 15-35% by weight.