This invention discloses in particular an actuation cylinder (10) for controlling the movement of a ring-gate (40) of a hydraulic machine, said actuation cylinder (10) comprising a body (18) forming a first chamber (22) provided with a first duct (26) and a second chamber (24) provided with a second duct (28) which ...

The invention concerns a rotor (100) for a synchronous generator having a plurality of salient poles (200) regularly disposed on the outer periphery of a rim (300), each pole comprising a coil with two external terminals said, respectively, first terminal (201) and second terminal (202), the poles being arranged so ...

ABSTRACT Hydro-electric turbine component (100) and method for enhancing life of the hydro-electric turbine component (100) by applying erosion resistant coating (250) are disclosed. The hydro-electric turbine component (100) includes a wedge-shaped substrate (210) having a tip portion (212) and at least two side...

A salient pole machine (30) comprises a rotor (20) rotating about a machine axis said rotor (20) having at its circumference a rotor rim (21 ) with a predetermined outer radius (29) whereby a plurality of salient poles (22) each extending in radial direction is attached to said rotor (20) at said rotor rim (21 ) at ...

ABSTRACT The invention concerns a method for coupling to the grid a hydraulic unit (1) having a synchronous generator (2), a runner (6), and wicket gates, the method comprises: a) a step of increasing the flow of water into the runner (6) from a time t0 to a time t1 so that the rotation frequency of the rotor of...

A bearing pad (16) for the bearing of a hydro-generator unit comprises a polymer part (11, 12) and a metal base (14), which are combined to make up said bearing pad (16). Maintenance in case of bearing failure is simplified and accelerated by the polymer part being a separate polymer plate (11, 12), by the metal bas...

A runner (4) for a hydraulic machine comprising a band (20), a crown (22), a plurality of blades (24) extending between the crown (22) and the band (20), wherein the runner (4) comprises a plurality of runner segments (30) which together define the runner (4), each runner segment (30) comprising a band portion (34),...

The invention relates to a device for inspecting a damage or a crack of part of a hydro turbine, comprising at least one underwater remote operated vehicle (20) or autonomous underwater vehicle, at least one floatable or buoyant probe (26) or at least one probe (26) and means to make said at least one probe floatabl...

The invention relates to a device (1) for inspecting a cavitation damage or a crack of a runner (7) of a hydro turbine, comprising a remote operated vehicle (20) or an autonomous underwater vehicle, comprising at least one camera and/or scanner, and means (24) for processing images from said camera and/or scanner to...

The invention concerns a method for starting a hydroelectric turbine (10) in a pumping mode, said turbine being provided with a runner (6) mechanically coupled to a shaft line (8) and a variable speed electric motor connected to a grid, a distributor (4) comprising guide vanes to control a flow of water to said runn...