Cleaning device

Abstract

The cleaning device for the exhaust gas turbine comprises openings, which open out into the flow duct upstream of the nozzle ring, for injecting a cleaning liquid from the radially inner side into the annular flow duct, a cavity, which is connected to the openings, for distributing the cleaning liquid to the openings, and a supply line for supplying the cleaning liquid to the cavity. The cleaning device according to the invention provides a uniform distribution of water to nozzle ring or to the rotor blades of the turbine rotor wheel.

1 . An exhaust gas turbine, comprising a housing, a turbine wheel which is fitted with rotor blades, an exhaust gas flow duct which is at least partially delimited by the housing, a plurality of guide elements, which are arranged in the flow duct upstream of the guide blades, of a guide device, and a device for cleaning the exhaust gas turbine, wherein the flow duct is of annular design in the region of the guide device, the cleaning device has openings, which open out into the flow duct, for injecting the cleaning liquid into the flow duct, and the openings for injecting are arranged in the flow direction upstream of the guide elements, said openings for injecting being arranged in the radially inner side of the annular flow duct.  
   
   
       2 . The exhaust gas turbine as claimed in  claim 1 , wherein a cavity which is connected to the openings is provided for distributing the cleaning liquid to and/or along the openings, with the cavity being arranged radially within the annular flow duct.  
   
   
       3 . The exhaust gas turbine as claimed in  claim 2 , wherein the openings are connected by means of tubular feed lines to the cavity.  
   
   
       4 . The exhaust gas turbine as claimed in  claim 2 , wherein the cavity is arranged substantially coaxially to the rotational axis of the turbine wheel, and is of substantially rotationally symmetrical design.  
   
   
       5 . The exhaust gas turbine as claimed in  claim 2 , wherein a supply line for supplying the cleaning liquid to the cavity is provided, with the supply line opening out into the cavity radially within the annular flow duct.  
   
   
       6 . The exhaust gas turbine as claimed in  claim 5 , wherein a supply line for supplying the cleaning liquid to the cavity is provided, with the supply line opening out into the cavity radially within the annular flow duct.  
   
   
       7 . The exhaust gas turbine as claimed in  claim 5 , wherein the openings are connected by means of tubular feed lines to the cavity.  
   
   
       8 . The exhaust gas turbine as claimed in  claim 7 , wherein a supply line for supplying the cleaning liquid to the cavity is provided, with the supply line opening out into the cavity radially within the annular flow duct.  
   
   
       9 . The exhaust gas turbine as claimed in  claim 1 , wherein the cleaning device comprises at least one hollow ring, in that the hollow ring at least partially delimits the flow duct, and in that the openings for injecting the cleaning liquid into the flow duct are formed in that side of the hollow ring which borders the flow duct.  
   
   
       10 . The exhaust gas turbine as claimed in  claim 9 , wherein the guide device comprises an annular housing part and guide elements which are fastened to the annular housing part, in that an annular cavity for receiving the cleaning liquid is formed in the annular housing part, and in that openings, which proceed from the cavity, for injecting the cleaning liquid from the cavity toward the guide elements are formed in the annular housing part.  
   
   
       11 . The exhaust gas turbine as claimed in  claim 1 , wherein the cleaning device comprises at least two coaxially-arranged elements which at least partially delimit the flow duct and are designed and connected to one another in such a way that a cavity, and ducts which proceed from the cavity and have one or more openings which open out into the flow duct and through which the cleaning liquid can be injected into the flow duct, are formed between at least two of the elements.  
   
   
       12 . The exhaust gas turbine as claimed in  claim 11 , wherein one single opening or a small number of openings, which extend in the manner of slots along the periphery of the flow duct, are formed between the elements.  
   
   
       13 . The exhaust gas turbine as claimed in  claim 1 , wherein the openings for injecting are arranged in each case upstream of a guide element in a stagnation region of the flow.  
   
   
       14 . The exhaust gas turbine as claimed in  claim 1 , wherein the openings for injecting are arranged in the peripheral direction in the region of a stagnation line upstream of in each case one guide element.  
   
   
       15 . The exhaust gas turbine as claimed in  claim 1 , wherein the guide device comprises a plurality of guide elements and in that in each case at least one opening for injecting the cleaning liquid into the flow duct is provided per guide element.  
   
   
       16 . An exhaust gas turbocharger, comprising an exhaust gas turbine as claimed in  claim 1 .  
   
   
       17 . The exhaust gas turbine as claimed in  claim 8 , wherein the cleaning device comprises at least one hollow ring, in that the hollow ring at least partially delimits the flow duct, and in that the openings for injecting the cleaning liquid into the flow duct are formed in that side of the hollow ring which borders the flow duct.  
   
   
       18 . The exhaust gas turbine as claimed in  claim 8 , wherein the cleaning device comprises at least two coaxially-arranged elements which at least partially delimit the flow duct and are designed and connected to one another in such a way that a cavity, and ducts which proceed from the cavity and have one or more openings which open out into the flow duct and through which the cleaning liquid can be injected into the flow duct, are formed between at least two of the elements.  
   
   
       19 . The exhaust gas turbine as claimed in  claim 8 , wherein the openings for injecting are arranged in each case upstream of a guide element in a stagnation region of the flow.  
   
   
       20 . The exhaust gas turbine as claimed in  claim 8 , wherein the openings for injecting are arranged in the peripheral direction in the region of a stagnation line upstream of in each case one guide element.  
   
   
       21 . The exhaust gas turbine as claimed in  claim 8 , wherein the guide device comprises a plurality of guide elements and in that in each case at least one opening for injecting the cleaning liquid into the flow duct is provided per guide element.  
   
   
       22 . An exhaust gas turbocharger, comprising an exhaust gas turbine as claimed in  claim 8.