Turbomachine having a temperature-controlled cover

Abstract

A turbomachine, comprising a lower housing part, an assembly inserted into the lower housing part from above, comprising two opposite housing covers and a rotor having a shaft, the rotor being fed through both housing covers, and an upper housing part that encloses the assembly from above and is fastened to the lower housing part, is provided. A shaft seal is arranged between the cover and the shaft. To maintain good function of the shaft seal during operation using cold or hot gases, at least one of the covers has a temperature-control means guided around the shaft, having a first and a second temperature-control channel, for controlling the temperature of the lid in the area around the shaft.

1 . A turbomachine comprising:
 a lower housing part;   an assemblage that is placed in the lower housing part from above and comprises two mutually opposing housing covers and a rotor, guided between the two mutually opposing housing covers, having a shaft; and   an upper housing part that encloses the assemblage from above and is secured to the lower housing part;   wherein at least one cover of the two mutually opposing housing covers has a temperature-control means which is guided around the shaft and serves to control the temperature of the at least one cover in a region around the shaft.   
     
     
         2 . The turbomachine as claimed in  claim 1 , wherein a shaft seal is arranged between the at least one cover and the shaft and the temperature-control means is guided about the shaft seal. 
     
     
         3 . The turbomachine as claimed in  claim 1 , wherein the temperature-control means has a first temperature-control duct in the at east one cover which is fluidically connected to a temperature-control fluid reservoir. 
     
     
         4 . The turbomachine as claimed in  claim 3 , wherein the temperature-control fluid is bearing oil which is provided for mounting the shaft. 
     
     
         5 . The turbomachine as claimed in  claim 3 , wherein the temperature-control duct is machined into an inside of the at least one cover. 
     
     
         6 . The turbomachine as claimed in  claim 3 , wherein the temperature-control means has a second temperature-control duct arranged radially outside the first temperature-control duct. 
     
     
         7 . The turbomachine as claimed in  claim 6 , wherein the second temperature-control duct is guided about the first temperature-control duct such that a tangential gap, free from temperature-control ducts, in a region of the first temperature-control duct is shielded in the radially outward direction by the second temperature-control duct. 
     
     
         8 . The turbomachine as claimed in  claim 6 , wherein the first temperature-control duct and the second temperature-control duct are connected to one another such that temperature-control fluid from the temperature-control fluid reservoir flows first through the radially inner temperature-control duct and thence into the radially outer temperature-control duct, before returning to the temperature-control fluid reservoir. 
     
     
         9 . The turbomachine as claimed in  claim 6 , wherein the first temperature-control duct and the second temperature-control duct have a rectangular cross section and the radially outer temperature-control duct has a longer extent in the axial direction and the radially inner temperature-control duct has a longer extent in the radial direction. 
     
     
         10 . The turbomachine as claimed in  claim 1 , wherein a gas supply for a shaft seal is guided radially between the first temperature-control duct and the second temperature-control duct of the temperature-control means.