#COPPUS TURBINE OVERSPEED TRIP MECHANISM GENERATOR#

Figure 11-2 shows the rotor assembly for this turbine. Notice the single disc wheel keyed to the shaft. In single-stage design, the emphasis is on simplicity, dependability, and low first cost.ДЇigure 11-1 is a cutaway illustration of a horizontal single-stage steam turbine. Mechanical efficiency will generally range from 30% to 60%. Single-stage turbines are usually limited to sizes of a few thousand hp (kW) or less, although larger capacities are available in special designs. A single pressure drop occurs between the inlet to the nozzle and the exit for the last row of blades. In a single-stage turbine, steam is accelerated through a nozzle or cascade of stationary nozzles and guided into the rotating buckets on the turbine wheel to produce power.

#COPPUS TURBINE OVERSPEED TRIP MECHANISM GENERATOR#

Type of driven apparatus: mechanical drive or generator drive.Direction of turbine steam flow: axial flow, radial flow, or tangential flow.Number of parallel exhaust stages: double flow or triple flow.Casing or shaft arrangement: single casing, tandem compound, or cross compound.Steam exhaust conditions: condensing, non-condensing, automatic extraction, mixed pressure, regenerative extraction, or reheat.Steam supply: saturated or superheated single or multiple pressure.Turbine stage design class: impulse or reaction.Number of valves: single- or multi-valve.Number of stages: single- or multi-stage.Steam turbines are classified according to their fundamental operating principles, some of which are:

Coppus turbine overspeed trip mechanism