The Udvar-Hazy Center displays a cut-away V-2 engine turbopump (next to the cut-away V-2 engine),
affording the visitor the opportunity to see inside this component.
The sign accompanying the turbopump reads
The V-2 engine was both
the world's first large liquid-propellant rocket engine and the first large
rocket engine to use a turbopump. The engine and its turbopump were developed
by the German army rocket group under Wernher von Braun. The turbopump was
manufactured by WUMAG, Abteilung Maschinenbau.
The turbopump drew propellants from the missile's tanks and injected them under
pressure into the combustion
chamber. It moved nearly 9,000 kilograms (20,000 pounds) of water
alcohol and liquid oxygen during the 60-second burning time. Exhaust gases
from a steam generator, which turned hydrogen peroxide into superheated steam
and oxygen, drove the turbine wheels in the center of the pump. The turbine
wheels in turn powered the pump impellers for the two propellants.
Transferred from NASA Marshall Space Flight
The Air Force Museum also has a cut-away V-2 engine
turbopump and cut-away V-2 engine.
I also have a number of resources regarding the V-2 engine and the V-2 missile.