# US 4,422,826 A · Propeller runner having swivelling blades for turbines

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- Number: US 4,422,826 A
- Document ID: US4422826A
- Status: Granted
- Kind: A
- Application number: 06/252,101
- Filed: 1981-04-08
- Granted: 1983-12-27
- Earliest claimed: 1980-04-24
- Assignees: Neyrpic
- Inventors: Severin Casacci; Paul Jarriand
- Web page: https://patentgrep.com/patent/US4422826A

## CPC

- F01D 7/00: Rotors with blades adjustable in operation; Control thereof (for reversing F01D1/30)
- F03B 3/14: Rotors having adjustable blades {(blade form or construction F03B3/123)}
- F04D 29/362: {during rotation}
- F05B 2260/74: by turning around an axis perpendicular the rotor centre line
- F05B 2260/76: the adjusting mechanism using auxiliary power sources
- F05D 2260/74: by turning around an axis perpendicular the rotor centre line
- F05D 2260/76: the adjusting mechanism using auxiliary power sources
- Y02E 10/20: Hydro energy
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F03B: MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A propeller runner having swivelling blades, each integral with a journal engaged in two bearings respectively in the outer portion and the inner portion of the runner, and equipped with lateral connecting rods for manipulation in rotation. The inner central portion of the hub of the runner includes a spider 29 each arm of which consists of a radial journal 31 prolonged by a threaded portion 32. Each blade journal 23 is engaged over a spider journal 31 with a bearing 26 and is held by a nut 33 screwed onto the portion 32 with the interposition of a thrust bearing 30. The spider 29 for a four-bladed runner preferably consists of a core 39 through which passes a shaft 40. The invention is applicable to propeller runners having swivelling blades for turbines.

## Claims

### Claim 1

A propeller runner having four swivelling blades radially mounted in a hub, each said blade having at its root spaced, coaxial first and second cylindrical bearing surfaces defining the axis of rotation of said blade about itself, this rotation being intended for governing the angle of incidence of said blade, lateral connecting rods on each blade the movement of which is controlled simultaneously by means internal to said runner so as to regulate jointly the angle of incidence of all of said blades, said first cylindrical bearing surface of each blade being engaged in a bearing formed in the outer portion of said hub, said second cylindrical bearing surface of each blade being engaged around a cylindrical journal, each said journal being rigidly and radially fixed around a central core which in turn is rigidly connected to a portion of said hub extending towards the center, said core carrying two diametrically opposite journals, a shaft passing through said core perpendicularly to the axis of said two journals, said shaft being locked in said core and having two ends which constitute two further journals, each said journal forming an axial thrust bearing for the corresponding blade.

### Claim 2 (depends on 1)

A propeller runner according to claim 1, wherein the outer portion of said hub is rigidly fixed onto the substantially radial face of the end of the torque transmission shaft in coaxial prolongation of said shaft, the outer portion of said hub supporting from the other side a nose cone which encloses the internal mechanism for support and control of the incidence of said blades.

### Claim 3 (depends on 1, 2)

A propeller runner according to claim 1 or 2, wherein said connecting-rods for manipulating said blades are hinged onto the movable body of an axial jack the piston and the rod of which are integral with said central core on the axis of said runner.