Power Plant Line Having a Variable-Speed Pump

Abstract

The invention relates to a power plant line, comprising a steam turbine and/or gas turbine that rotates at a constant speed in order to drive an electric generator; a variable-speed pump for conveying and/or compressing a working medium in order to drive and/or supply the process of the steam turbine and/or the gas turbine or to pump and/or compress an exhaust gas produced in the process supply or in the gas turbine. The invention is characterized in that the variable-speed pump is driven by the steam turbine and/or gas turbine and a speed-controllable gear train is arranged in the driving connection, said gear train having a power split, which comprises a mechanical main branch and a hydrodynamic secondary branch, wherein driving power is branched off from the mechanical main branch via a hydrodynamic coupling or a hydrodynamic converter by means of the hydrodynamic secondary branch and fed back to the mechanical main branch at the output side of the gear train in a variable-speed manner by means of a superimposing gear train.

1 - 10 . (canceled) 
     
     
         11 . A power plant train comprising:
 a steam turbine and/or gas turbine, which revolves at a constant speed, for driving an electric generator;   a variable-speed pump for conveying and/or compressing a working medium for the drive and/or the process supply of the steam turbine and/or the gas turbine or for conveying and/or compressing an exhaust gas arising in the process supply or the gas turbine; characterized in that   the variable-speed pump is driven by means of the steam turbine and/or gas turbine and an adjustable-speed transmission is arranged in the drive connection, comprising a power split having a mechanical main branch and a hydrodynamic secondary branch,   by means of the hydrodynamic secondary branch, drive power is branched off via a hydrodynamic clutch or a hydrodynamic converter from the mechanical main branch and is supplied back to the mechanical main branch on the transmission output side at variable speed by means of a superposition transmission.   
     
     
         12 . The power plant train according to  claim 11 , characterized in that the variable-speed bump is a boiler feed pump for conveying the working medium of the steam turbine. 
     
     
         13 . The power plant train according to  claim 11 , characterized in that the hydrodynamic secondary branch is configured to transmit at most 30% or 35% of the power of the mechanical main branch or all of the power transmittable using the adjustable-speed transmission. 
     
     
         14 . The power plant train according to  claim 12 , characterized in that the hydrodynamic secondary branch is configured to transmit at most 30% or 35% of the power of the mechanical main branch or all of the power transmittable using the adjustable-speed transmission. 
     
     
         15 . The power plant train according to  claim 11 , characterized in that a step-down transmission is connected upstream from the adjustable-speed transmission, which is particularly flanged externally onto the adjustable-speed transmission. 
     
     
         16 . The power plant train according to  claim 12 , characterized in that a step-down transmission is connected upstream from the adjustable-speed transmission, which is particularly flanged externally onto the adjustable-speed transmission. 
     
     
         17 . The power plant train according to  claim 13 , characterized in that a step-down transmission is connected upstream from the adjustable-speed transmission, which is particularly flanged externally onto the adjustable-speed transmission. 
     
     
         18 . The power plant train according to  claim 14 , characterized in that a step-down transmission is connected upstream from the adjustable-speed transmission, which is particularly flanged externally onto the adjustable-speed transmission. 
     
     
         19 . The power plant train according to  claim 15 , characterized in that the step-down transmission comprises a planetary gear, whose planet carrier is carried by the adjustable-speed transmission, in particular its housing. 
     
     
         20 . The power plant train according to  claim 16 , characterized in that the step-down transmission comprises a planetary gear, whose planet carrier is carried by the adjustable-speed transmission, in particular its housing. 
     
     
         21 . The power plant train according to  claim 17 , characterized in that the step-down transmission comprises a planetary gear, whose planet carrier is carried by the adjustable-speed transmission, in particular its housing. 
     
     
         22 . The power plant train according to  claim 18 , characterized in that the step-down transmission comprises a planetary gear, whose planet carrier is carried by the adjustable-speed transmission, in particular its housing. 
     
     
         23 . The power plant train according to  claim 15 , characterized in that the step-down transmission has a transmission input in drive connection to the steam turbine and/or the gas turbine, furthermore at least two or precisely two transmission outputs and a power split, which distributes the drive power from the transmission input to the transmission outputs, and a pump is attached to each transmission output, in particular via an adjustable-speed transmission, comprising a power split having a mechanical main branch and a hydrodynamic secondary branch, drive power being branched off via a hydrodynamic clutch or a hydrodynamic converter from the mechanical main branch by means of the hydrodynamic secondary branch and being supplied back to the mechanical main branch at the transmission output side at variable speed by means of a superposition transmission. 
     
     
         24 . The power plant train according to  claim 23 , characterized in that a pump revolving at constant speed is attached to one transmission output and a variable-speed pump is attached via an adjustable-speed transmission to the other transmission output, the pump revolving at constant speed being connected upstream as the backing pump with respect to the conveyed medium from the variable-speed pump. 
     
     
         25 . The power plant train according to  claim 23 , characterized in that a parking brake and/or a disconnecting clutch is arranged in each case in the drive connection between one transmission output or both transmission outputs and the respective pump. 
     
     
         26 . The power plant train according to  claim 11 , characterized in that the adjustable-speed transmission has an oil pump, which is used for the lubricant oil supply of the adjustable-speed transmission, the steam turbine and/or the gas turbine, the generator, the step-down transmission, and/or a secondary assembly provided for the operation of the steam turbine and/or the gas turbine. 
     
     
         27 . The power plant train according to  claim 12 , characterized in that the adjustable-speed transmission has an oil pump, which is used for the lubricant oil supply of the adjustable-speed transmission, the steam turbine and/or the gas turbine, the generator, the step-down transmission, and/or a secondary assembly provided for the operation of the steam turbine and/or the gas turbine. 
     
     
         28 . The power plant train according to  claim 13 , characterized in that the adjustable-speed transmission has an oil pump, which is used for the lubricant oil supply of the adjustable-speed transmission, the steam turbine and/or the gas turbine, the generator, the step-down transmission, and/or a secondary assembly provided for the operation of the steam turbine and/or the gas turbine. 
     
     
         29 . The power plant train according to  claim 14 , characterized in that the adjustable-speed transmission has an oil pump, which is used for the lubricant oil supply of the adjustable-speed transmission, the steam turbine and/or the gas turbine, the generator, the step-down transmission, and/or a secondary assembly provided for the operation of the steam turbine and/or the gas turbine. 
     
     
         30 . The power plant train according to  claim 11 , characterized in that the pump pumps exhaust gas or a component thereof of the gas turbine and/or a hot steam generator for the steam turbine into an underground accumulator.