Abstract: Multiple stage centrifugal pumps have a plurality of rotors arranged on a drive shaft are shown. At least one rotor is formed as a hollow shaft which is rotatably journalled on the drive shaft and which rotates with a speed of rotation n2 which is different from the speed of rotation n1 of the drive shaft. The hollow shaft is driven by a mechanical converter which takes up mechanical power from the drive shaft in the housing and gives it off at a different speed of rotation n2 to the hollow shaft in such a manner that the speed of rotation of a rotor of the first stage is lower in order to produce a lower NPSHR value for the multiple stage pump.

Abstract: In a turbo compressor, such as a centrifugal compressor, having swirl inducing structure, such as inlet guide vanes, one or more free rotors are located intermediate the swirl inducing structure and the inlet of the compressor. The free rotors are driven by the flow and the kinetic energy stored therein serves to mitigate transient changes in the flow as perceived at the inlet of the compressor such that a more stable operation results.

Abstract: The invention is a turbo machine comprising a rotatably mounted blade row, such as a compressing or pumping rotor and apparatus for providing aerodynamic feedback to the blade row which feedback apparatus has substantially zero pressure difference across it. The feedback may be provided by various apparatus, including at least one free-rotor that is mounted in aerodynamic feedback with the blade row, for instance coaxially with respect to the axis of rotation of the blade row and freely rotatably with respect to the blade row. The free-rotor may also be located in ductwork in communication with the blade row. The feedback may also be provided by a blade row having a variable stagger angle and apparatus to adjust the stagger angle so that the mean pressure rise across the variable stagger angle blade row is zero. The invention also includes a method for controlling operating anomalies such as rotating stall and surge of a turbo machine such as a compressor using the above described apparatus.

Abstract: An exhaust gas turbocharger for an internal combustion engine is described, in the turbine housing of which there is arranged upstream of the turbine wheel a turbine guide wheel which is mounted rotatably relative to the turbine wheel. In order to be able to improve the response of the internal combustion engine after a positive load change without any impairment of the overall efficiency of the internal combustion engine, it is proposed to provide at least one braking device which reduces the speed of the turbine guide apparatus in higher load.

Abstract: An improved water turbine which has a first rotatable cylinder having a water inlet hole and a plurality of nozzles, and a second rotatable cylinder having a plurality of rotating blades on the inner surface is disclosed. Water dropped from an altitude enters the first rotatable cylinder through the water inlet hole, where it is injected to the outside of the first rotatable cylinder causing the first rotatable cylinder to rotate. Water passing through the nozzles then strikes the rotating blades to rotate the second rotatable cylinder.

Abstract: Inside a single casing the turbopump comprises a main shaft driven by a turbine, a secondary shaft coaxial with the main shaft, a low pressure impeller mounted on the secondary shaft to create a medium pressure flow which is brought back to flow parallel to the axis of the turbopump by a baffle and which is deflected through 180.degree. in a return channel so as to come back parallel to the axis of the turbopump towards a high pressure impeller mounted on the main shaft inside the secondary shaft. The entire HP flow formed by the HP impeller is output via the insides of curved hollow blades forming a portion of the LP impeller, this HP centrifugal flow thus establishes a driving torque for the LP impeller.

Abstract: Inside a single casing the turbopump comprises a main shaft driven by a turbine, a secondary shaft coaxial with the main shaft, a low pressure impeller mounted on the secondary shaft to create a medium pressure flow which is brought back to flow parallel to the axis of the turbopump by a baffle and which is deflected through 180.degree. in a return channel so as to come back parallel to the axis of the turbopump towards a high pressure impeller mounted on the main shaft inside the secondary shaft. The entire HP centrifugal flow formed by the HP impeller is output via the insides of fixed hollow blades forming a portion of the baffle towards a delivery channel secured to the casing and collecting the high pressure fluid after it has passed through the fixed hollow blades. A shunt channel is taken from the delivery channel to apply a high pressure centripetal flow through the insides of the curved hollow blades forming a portion of the LP impeller, thereby establishing driving torque for the LP impeller.

Abstract: Inside a single casing the turbopump comprises a main shaft driven by a turbine, a secondary shaft coaxial with the main shaft, at least one low pressure boost impeller mounted on the secondary shaft. The LP fluid flow is brought parallel to the axis of the turbopump by a baffle and after being deflected through 180.degree. in a return channel it is returned parallel to the axis of the turbopump toward a high pressure impeller mounted on the main shaft inside the secondary shaft. The entire HP flow formed by the HP impeller is delivered axially to a boost turbine secured to the secondary shaft and to the LP boost impeller and disposed between the main shaft and the secondary shaft. Through orifices and an axial channel are formed in the main shaft to pass the flow of HP fluid leaving the boost turbine inside the main shaft and then to exhaust the HP fluid to a delivery channel secured to the casing through the radial arms situated at the inlet to the turbopump.

Abstract: An idler disk for reducing fluid drag forces in a machine having a rotating component is disclosed. An outer housing is provided for the machine and a cavity is defined in the outer housing. The cavity has opposed side walls. A rotatable component is positioned in the cavity and the rotatable component is spaced apart from the side walls of the cavity. At least one freely rotatable idler disk is positioned in the cavity and the idler disk is in spaced apart relationship with the rotatable component and the side walls of the cavity. The idler disk extends in the cavity along at least a portion of the length of the rotatable component. The idler disk is caused to rotate in the same direction as the rotatable component by the rotating fluid in the cavity. The fluid is caused to rotate by the rotation of the rotatable component. The rotating idler disk increases the speed of the fluid rotating adjacent the rotatable component and thereby reduces the fluid drag on the rotatable component.

Abstract: Two propeller shafts are disposed coaxially one within another. A collar of the inner propeller shaft grips into the hollow outer propeller and supports the inner shaft axially over axial friction bearing elements. The axial friction bearing elements are surrounded by a shaft connecting piece, which is divided in the axial direction and at least one half of which can be removed radially, in order to create access to the axial friction bearing elements. By way of the axial friction bearing elements, axial forces of the inner propeller shaft reach the hollow outer propeller shaft and, from the latter, by way of further axial friction bearing elements, further reach a bearing housing, which is preferably also divided in the longitudinal direction.

Abstract: A power turbine suitable for a gas turbine engine which a blade of one array of turbine blades has a fan propulsion blade attached to its radially outer extent. A drum member is further provided which carries at least one further annular array of turbine blades and is coaxially interposed between the arrays of turbine blades and fan propulsion blades to rotate with the same in operation. Aperatures are defined through the drum member to accommodate the attachment structure provided between the turbine blade and the fan propulsion blades such that relative radial movement is permitted between the turbine blade and the drum.

Abstract: A rotor stage disposed within an annular fluid flowpath in a turbomachine is disclosed. The rotor stage includes outer and inner rings and a plurality of first and second airfoils. The outer and inner rings define flowpath surfaces for said flowpath. The first and second airfoils extend between the rings for transferring energy between the fluid and the rotor stage. At least one of the first airfoils surrounds means for transmitting energy across the flowpath.

Abstract: A pair of cold air driven tubines are mounted in-line with each turbine driving one of two coaxial drive shafts. Each drive shaft is independently supported and separate drive air is supplied to each turbine such that the direction and speed of rotation of each drive shaft is independently controlled. Exhaust air from the forward turbine vents through an exhaust cavity that surrounds the aft turbine. Inlet drive air to the aft turbine is supplied via air ducts formed through the center of struts which extend radially from the inlet of the aft turbine, through the exhaust cavity and to an inlet port external to the turbine housing.

Abstract: Turbocharger acceleration is enhanced by a single element, multi-vane nozzle ring rotatably mounted to the turbine wheel or housing and optimizing exhaust gas flow direction into the turbine wheel at engine idle conditions and other operating conditions, with means to control rotation and speed of the nozzle ring to provide optimum acceleration and cruise conditions by the use of a rotating turbine nozzle ring.

Abstract: In a multi-spool turbo machine, a first shaft of the low pressure spool is supported for rotation with respect to a second shaft of the high pressure spool and is located with respect to the second shaft by means of a roller bearing. Rollers of the bearing are inserted between an internal ring mounted on the second shaft and an outer ring mounted by a ring support assembly carried by the first shaft. The ring support assembly includes a ring support member which comprises, at its outer periphery, a first toothed element cooperating with a second toothed element carried by retaining means. The ring support member is held axially by a channel-section member.

Abstract: Pumping apparatus for collecting polluted liquids such as oil on water and including a first pumping stage comprising a rotatable annular rotor having curved blades shaped to draw liquid inwardly towards the center of rotation, and stationary blades disposed within the rotor blades to receive liquid into the spacers between them, and a further pumping stage having rotatable blades shaped to receive the liquid from the stationary blades and deliver it under pressure in an upward direction to an outlet. The pumping apparatus may be mounted on a flotation unit which is suitable for collection of oil from the surface of water.

Abstract: New concepts of Components and Unities of Turbo-Machines based on a mathematical theory checked through experiments and permitting to predict the behaviour of a fluid particle subjected to a system of forces;Structures enabling all types of Single and Compound Turbo-Machines to operate through new principles insuring the Maximum Possible Efficiency to these Machines.

Abstract: A steam turbine comprising a housing in which there are at least two rotors turning on a common axis in the same direction but at different speeds. The rotors are connected by gearing preferably located externally of the housing. In the preferred form, the faster rotating rotor is driven by steam from a first steam nozzle or nozzles. The adjacent slower rotating rotor is driven by steam from a second steam nozzle or nozzles. Specially arranged vanes on the slower rotor and fixed vanes on the housing enable the expanding steam to react between the first and second rotors and the second rotor and the housing to obtain the desired power output from the steam.In a modification, the second rotor has ports therethrough which extend diagonally backward and outward from the interior side of the second rotor to the exterior side so that some of the steam from the first steam nozzle if of higher pressure can pass through the diagonal ports to engage the fixed vanes on the housing.

Abstract: A steam turbine having side by side rotors within the turbine housing, one rotor fixed to the turbine shaft and the other rotor free to rotate on the turbine shaft. The fixed rotor has a single set of vanes, the freely rotatable rotor has two sets of vanes, one set being adjacent the vanes of the fixed rotor and the other set adjacent a fourth set of vanes integral with the housing. One steam nozzle delivers steam against the vanes on the fixed rotor and a second steam nozzle delivers steam against the set of vanes on the second rotor that are adjacent the fixed vanes on the housing. The steam pressure is controlled so that steam from the nozzles will drive the fixed rotor and shaft at a selected speed which may be faster or slower than the speed of the freely rotatable rotor. The freely rotatable rotor may include reversely directed apertures permitting steam from the first nozzle to flow outwardly to act against the fixed vanes on the housing.

Abstract: A multiple stage pump having pumping means in an inner case which is removable from the outer case to which supply and discharge conduits are respectively connected to an inlet port and an outlet port without disturbing the conduit connections. The pump stages comprise a first or booster stage having multiple impellers and a second stage of a single impeller, the impellers of the first and second stages being connected to and driven by different shafts, the speeds of which can be independent of one another.

Abstract: An exhaust-gas turbocharger includes a low pressure stage having a compressor wheel and a turbine wheel mounted on one shaft and a high pressure stage having a compressor wheel and a turbine wheel mounted on another shaft. The two shafts are arranged coaxially one within the other, and the compressor and turbine units of either stage can be located on the inner or outer shaft.

Abstract: An adjustable coupling for operatively connecting the shaft of a low-pressure deep well pump to the shaft of a high-pressure booster pump whereby both pumps may be driven by a common prime mover.

Abstract: A turbofan engine is provided with a core engine, a first fan and a second fan. First and second fan ducts are provided for bypassing a portion of the air flow leaving the fans around the core engine. One of these fan ducts has its inlet disposed downstream of the second fan, while the second duct has its inlet disposed between the first and second fan. Means are provided for varying the proportion of the flow of air among the fan ducts and core engine. Integrated, or separate coaxial nozzles are provided for receiving the flows from the individual fan ducts and core engine and exhausting these flows into the atmosphere.

Abstract: A fluid-flow machine. At least one substantially disc-shaped rotor has a plurality of fluid-flow channels therethrough. Each fluid-flow channel comprises rectangular shaped inlet and outlet openings on opposite sides of the rotor disposed at different distances from the axis of rotation of said rotor, a tangential inlet channel portion including the inlet opening for receipt of a fluid-flow medium, a tangential outlet channel portion including the outlet opening for discharge of the fluid-flow medium and a circular radial connecting section between the channel portions having curved opposite ends connecting said inlet portion to said outlet portion completely around the perimeter thereof. Each channel portion has a direction, for directing the fluid-flow medium, which has a transverse and an axial component relative to the axis of rotation of the rotor. The axial components are in the same direction and the transverse components are in the opposite direction.