Apparatus for intermittently turning a turbine shaft
AssigneeSulzer Turbomaschinen AG
InventorHorst Schmidt
Life of this patent
Estimating the term…
Abstract
Apparatus for intermittently turning a turbine shaft wherein a ratchet wheel is secured upon the shaft and is engaged intermittently by a to and fro movement of a ratchet arm actuated by a reciprocating drive mechanism. The ratchet arm has a combined rectilinear and pivotal movement and is provided with a device, operable in the event the ratchet wheel is put into rotation by starting up of the turbine while the ratchet arm is engaged with the ratchet wheel, for detaining the arm against a return pivotal movement towards the ratchet wheel after being hurled outwardly therefrom to a predetermined position.
Claims8
Apparatus for turning a power driven shaft such as a turbine rotor shaft about its axis in a step-by-step manner comprising a toothed ratchet wheel mounted on the shaft, a ratchet arm engageable with the teeth on said ratchet wheel, means pivotally mounting said ratchet arm on a support for deflection about an axis parallel to the axis of said ratchet wheel, actuating means for effecting a to and fro rectilinear movement of said ratchet arm support and hence also said ratchet arm from a starting position towards and away from said ratchet wheel, means producing during said to and fro rectilinear movement of said ratchet arm a deflection thereof about its pivot axis towards and away from the toothed periphery of said ratchet wheel, and means carried by said ratchet arm and operable in the event the ratchet wheel is put into rotation by starting up of the turbine while said ratchet arm is engaged with said ratchet wheel for detaining said ratchet arm against a return movement towards said ratchet wheel after being hurled outwardly therefrom to a predetermined position.
Dependencies are inferred from the claim text.