Abstract: A runner is for a fluid machine. The runner includes a runner hub and one or more curved blades. The blade is removably fixed to the runner hub by fixing elements that extend into a double curved first socket portion of the blade. The first socket portion bears against the runner hub at one or more contact surface that is plane.

Abstract: A runner device (1) for a hydraulic fluid flow machine is described, the runner (1) including a runner hub (2) and a number of vanes (4) distributed around the center axis (S) of the runner (1), the vanes (4) being releasably connected to the runner (1) by means of bases (41) that complementarily fit grooves (21) in the runner hub (2), characterized by the grooves (21) in the runner hub (2) extending, at least at one of the outer edge portion (23) or the inner edge portion (25) of the runner hub, respectively all the way out to or all the way in to the edge portion (23, 25), whereby the bases (41) may extend radially out to or in to at least one of the outer edge portion (23) or the inner edge portion (25), respectively, of the runner hub (2). A method of providing a runner (1) for a hydraulic fluid flow machine is described as well.

Abstract: A bucket connection for a turbine runner that includes a number of buckets encircling a centre disk. At least one bucket is pivotably or hingedly connected to the centre disk, and the position of the bucket relative to the centre disk under operation is set by an abutment between the bucket and a support, where the support is connected to or constitutes a part of the centre disk and where the abutment is constituted by a non-planar abutment surface on the support and an abutment surface on the bucket The bucket connection is provided with a buckling and is the abutment surface of the bucket is provided with a buckling adapted to fit into the buckling of the abutment surface of the support, whereby the abutment is adapted to accommodate forces acting both tangentially and radially of the bucket.

Abstract: A runner device (1) for a hydraulic fluid flow machine is described, the runner (1) including a runner hub (2) and a number of vanes (4) distributed around the centre axis (S) of the runner (1), the vanes (4) being releasably connected to the runner (1) by means of bases (41) that complementarily fit grooves (21) in the runner hub (2), characterized by the grooves (21) in the runner hub (2) extending, at least at one of the outer edge portion (23) or the inner edge portion (25) of the runner hub, respectively all the way out to or all the way in to the edge portion (23, 25), whereby the bases (41) may extend radially out to or in to at least one of the outer edge portion (23) or the inner edge portion (25), respectively, of the runner hub (2). A method of providing a runner (1) for a hydraulic fluid flow machine is described as well.

Abstract: A bucket connection for a turbine runner (1) where the turbine runner (1) includes a number of buckets (4) encircling a centre disk (2), where at least one bucket (4) is pivotably or hingedly connected to the centre disk (2), and where the position of the bucket (4) relatively the centre disk (2) under operation is set by an abutment (22) between the bucket (4) and a support (16), where the support (16) is connected to or constitutes a part of the centre disk (2), and where the abutment is constituted by an abutment surface 18 on the support 16 and an abutment surface 20 on the bucket 4, where the abutment surface 18 on the support 16 is non-planar, in that it is provided with a buckling 19, and that the abutment surface 20 of the bucket 4 is provided with a buckling 21 adapted to fit into the buckling 19 of the abutment surface 18 of the support 16, whereby the abutment 22 is adapted to accommodate forces acting both tangentially and radially of the bucket 4.

Abstract: A method and device for reducing wear in a water turbine (1) comprising a turbine housing (2) and an impeller (4), and where between the turbine housing (2) and the impeller (4) is arranged a seal (16, 18), and where the method comprises supplying cleaned water to the seal (16, 18).

Abstract: A method and a device to counteract wear about a guide vane (16) from a particle bearing drive water, the guide vane (16) being arranged in a guide vane housing (14) in a water turbine (1), and where the method comprises: —routing a supply channel (36) for water cleaner than the drive water to the attachment point area between the guide vane (16) and the guide vane housing (14); and—leading water cleaner than the drive water to flow through a slit (28) where the slit (28) at least partly encircles the guide vane (16).

Abstract: A method and a device for counteracting wear from particle bearing drive water in a runner (4) in a water turbine (1), the runner (4) comprising a runner hub (16) and a vane (18), or a runner hub (16), a vane (18) and a runner band (20), the vane (18) being attached to the runner hub (16) in a first attachment area (22) and to the runner band (20) in a second attachment area (24), and where the method comprises: —routing a supply channel (40) for water cleaner than the drive water to at least the first attachment area (22) or the second attachment area (24) and—leading water cleaner than the drive water to flow over at least a portion of the vane (18) surface.

Abstract: A device for a runner (1) for a fluid machine comprising a runner hub (2) and a number of blades (4) distributed around the centre axis (8) of the runner (1), each blade (4) being detachably connected to the runner (1).

Abstract: A method and a device to counteract wear about a guide vane (16) from a particle bearing drive water, the guide vane (16) being arranged in a guide vane housing (14) in a water turbine (1), and where the method comprises: —routing a supply channel (36) for water cleaner than the drive water to the attachment point area between the guide vane (16) and the guide vane housing (14); and—leading water cleaner than the drive water to flow through a slit (28) where the slit (28) at least partly encircles the guide vane (16).

Abstract: A method and a device for counteracting wear from particle bearing drive water in a runner (4) in a water turbine (1), the runner (4) comprising a runner hub (16) and a vane (18), or a runner hub (16), a vane (18) and a runner band (20), the vane (18) being attached to the runner hub (16) in a first attachment area (22) and to the runner band (20) in a second attachment area (24), and where the method comprises: —routing a supply channel (40) for water cleaner than the drive water to at least the first attachment area (22) or the second attachment area (24) and —leading water cleaner than the drive water to flow over at least a portion of the vane (18) surface.

Abstract: A device for a runner (1) for a fluid machine comprising a runner hub (2) and a number of blades (4) distributed around the centre axis (8) of the runner (1), each blade (4) being detachably connected to the runner (1).

Abstract: A method and device for reducing wear in a water turbine (1) comprising a turbine housing (2) and an impeller (4), and where between the turbine housing (2) and the impeller (4) is arranged a seal (16, 18), and where the method comprises supplying cleaned water to the seal (16, 18).