Since the steam turbine generator set is composed of a steam turbine and a generator coupling and the steam requires a certain flow length to operate in the steam turbine cylinder, The steam turbine is divided into high pressure, medium pressure cylinders. cylinders and low pressure cylinders that work in series, after adding the generator, the assembly is very long and cannot be arranged vertically. The horizontally arranged steam turbine has the necessary conditions for high-speed operation, so the generator generally has only one pair of poles, and its rotor continues to rotate at a speed of 3,000 rpm, and the rotor diameter generally does not exceed 0.8-1.0 meters.
Hydraulic turbines are not always arranged vertically. For example, through-type hydraulic turbines, which mainly rely on large dwater flows to produce electricity, are arranged horizontally. What you are talking about is a hydrogenerator which typically relies on a high water pressure, low flow generator. The hydrodynamic turbine of this hydrogenerator is located at the bottom. If installed vertically, it is easier to design and construct the volute. is vertical The layout requires reducing the height of the generator, so large hydrogen generators use large diameter multi-pole generators and flat motors to reduce the height of the factory building.