Integrated gate operating servomotor

Claim 2

A hydraulic turbine having a runner comprising: a head cover constructed of upper and lower ring-like members connected together by a plurality of spaced substantially radially directed rib-like members defining a plurality of box-like liquid tight normal structural compartments; a bottom ring spaced from said head cover and defining therewith a water passageway leading to said runner; a plurality of pivotally supported circumferentially spaced wicket gates disposed across said water passageway; walls defining an opening through at least one of said rib-like members; a pressure fluid operated piston operatively associated with said opening seal means engaging said piston and the associated rib-like member about said opening to provide a fluid tight sliding seal therebetween, said seal and piston defining with the associated compartment a fluid tight chamber on at least one side of said piston; means for providing pressure fluid to said chamber to cause movement of said piston; and means pivotally connecting said piston to said wicket gate to cause pivotal movement thereof upon movement of said piston.

Claim 3

A hydraulic turbine having a runner comprising: a head cover constructed of upper and lower ring-like members connected together by a plurality of spaced substantially radially directed rib-like members defining a plurality of box-like liquid tight normal structural compartments; a bottom ring spaced from said head cover and defining therewith a water passageway leading to said runner; a plurality of pivotally supported circumferentially spaced wicket gates disposed across said water passageway; walls defining openings through at least two adjacent and facing rib-like members of said compartments; a pair of rigidly connected pressure fluid operated pistons contained within said openings; seal means connected to said adjacent walls about said openings and engaging said pistons to provide a fluid tight sliding seal therebetween, said pistons closing said openings and sealing the associated compartments behind said pistons; means providing pressure fluid to said associated compartments to cause movement of said pistons in one direction when said pressure fluid is delivered to one of said compartments; and means pivotally connecting said pistons to said wicket gates to cause pivotal movement thereof upon movement of said pistons.

Claim 4

A hydraulic turbine having a runner comprising: a head cover constructed of upper and lower ring-like members connected together by a plurality of spaced substantially radially directed rib-like members defining a plurality of box-like liquid tight normal structural compartments; a bottom ring spaced from said head cover and defining therewith a water passageway leading to said runner; a plurality of pivotally supported circumferentially spaced wicket gates disposed across said water passageway; walls defining openings through at least two adjacent and facing rib-like members of said compartments; a pair of rigidly connected pressure fluid operated pistons contained within said openings; seal means connected to said adjacent walls about said openings and engaging said pistons to provide a fluid tight sliding seal therebetween, said pistons closing said openings and sealing the associated compartments behind said pistons; means providing pressure fluid to said associated compartments to cause movement of said pistons in one direction when said pressure fluid is delivered to one of said compartments; and means pivotally connecting said pistons to said wicket gates to cause pivotal movement thereof upon movement of said pistons.

Claim 5

The hydraulic turbine set forth in claim 2 wherein said pivotal Means includes an operating ring slidably supported on said head cover, means connecting said ring to said piston and means pivotally connecting said ring to said wicket gates.