Single flow turbopump with integrated boosting
AssigneeSociete Europeenne de Propulsion
InventorJean-Philippe N. Girault
Life of this patent
Estimating the term…
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.
Claims19
A single flow turbopump with integrated boosting for pressurizing a fluid, comprising within a single casing:
- a main shaft driven by a turbine;
- a secondary shaft coaxial with the main shaft;
- at least one low pressure inducer mounted inside the casing on the secondary shaft in the vicinity of an inlet for low pressure fluid;
- at least one low pressure impeller mounted on the secondary shaft downstream from the low pressure inducer;
- a low pressure baffle secured to the casing and disposed downstream from the low pressure impeller to restore the medium pressure fluid flow to a direction parallel to the axis of the turbopump;
- a return channel for deflecting the medium pressure fluid flow from the baffle through 180.degree. and for returning said flow parallel to the axis of the turbopump towards a high pressure impeller mounted on the main shaft inside the secondary shaft in such a manner as to deliver an entire high pressure centrifugal flow formed by the high pressure impeller through the insides of curved hollow blades forming a portion of said low pressure impeller, said high pressure centrifugal flow flowing through the insides of said curved hollow blades generating driving torque for the low pressure impeller;
- and
- a delivery channel secured to the casing and collecting the high pressure fluid after it has passed through said curved hollow blades, the high pressure impeller constituting a high pressure pump coupled to a low pressure boost pump constituted by the low pressure inducer and the low pressure impeller and constituting a unitary assembly.
A single flow turbopump with integrated boosting for pressurizing a fluid, comprising within a single casing:
- a main shaft driven by a turbine;
- a secondary shaft coaxial with the main shaft;
- at least one low pressure inducer mounted inside the casing on the secondary shaft in the vicinity of an inlet for low pressure fluid;
- at least one low pressure impeller of the helio-centrifugal type mounted on the secondary shaft downstream from the low pressure inducer;
- a low pressure baffle secured to the casing and disposed downstream from the low pressure impeller to restore the medium pressure fluid flow to a direction parallel to the axis of the turbopump;
- a return channel for deflecting the medium pressure fluid flow from the baffle through 180.degree. and for returning said flow parallel to the axis of the turbopump towards a high pressure impeller arranged in such a manner on the main shaft inside the secondary shaft such that the high pressure impeller delivers a high pressure fluid via the insides of curved hollow blades of the low pressure impeller in a plane that is inclined at an angle of less than 90.degree. relative to the axis of the turbopump, said high pressure centrifugal flow flowing through the insides of said curved hollow blades generating driving torque for the low pressure impeller;
- and
- a delivery channel secured to the casing and collecting the high pressure fluid after it has passed through said curved hollow blades, the high pressure impeller constituting a high pressure pump coupled to a low pressure boost pump constituted by the low pressure inducer and the low pressure impeller and constituting a unitary assembly.
Dependencies are inferred from the claim text.