Impeller having a hub assembled from a plurality of identical parts

• US 6,176,680 B1
• Filed: 06/09/1999
• Issued: 01/23/2001
• Est. Priority Date: 06/22/1998
• Status: Expired due to Fees

• Current Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Original Assignee: ITT Manufacturing Enterprises, Inc. (ITT, Inc.)
• Inventors: Andersson, Andreas, Ringblom, Thomas
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): NGUYEN, NINH H
• Application Number:
  US09/328,706
• Time in Patent Office: 594 Days
• Field of Search: 416/212.R, 416/212.A, 416/219.A, 416/220.A, 416/213.R, 416/213.A, 416/223.B
• US Class Current: 416/212.00R
• CPC Class Codes: B63H 1/20 Hubs; Blade connections
• CPC Class Codes: F04D 29/181 Axial flow rotors F04D29/185 take precedence

Abstract

The invention concerns an impeller or a propeller for a rotary machine such as a pump, a turbine or a propulsion unit.

The impeller comprises a hub (1) and an intermediate part put together by a number of identical hub sections (3) with mounted vanes (4). The partition between two hub sections (3) follows a curve which is substantially axially directed.

Claims

1. A rotor for a rotary machine including a liquid pump, said rotor comprising a central part with a number of vanes attached to its periphery, the central part including a hub (1) with a flange (2), an intermediate part and an end part (5), said intermediate part being put together by a number of identical hub sections (3) with partition cuts therebetween, each section (3) provided with a vane (4), the partition cuts having substantially axially directed routes each partition cut following a curve which has substantially the same route as the connection line between a vane (4) and its hub section (3).

2. A rotor according to claim 1, wherein each partition cut between two sections (3) is located half-way between two adjacent vanes (4).

3. A rotor according to claim 2, wherein the ends of each partition cut deviate from said curve and are given a route substantially perpendicular to the partition cuts between the intermediate part and the flange (2) of the hub part (3) and the end part (5) respectively.

4. A rotor according to claim 1, wherein adjacent sections have opposing areas (6) and (7) the opposing areas (6) and (7) provided with shoulders (8) and corresponding notches (9) for securing of the sections, the shoulders and notches being designed with lateral surfaces which are oblique with regard to the opposing areas (6) and (7) and where two of said lateral surfaces are in a plane perpendicular to a rotary shaft of the rotor.

5. A rotor according to claim 1, wherein the end part includes a flanges the flange (2) of the hub part and the flange of the end part (5) encircle opposing flanges on the intermediate part.

6. A rotor according to claim 1, wherein said rotor comprises an impeller.

7. A rotor according to claim 1, wherein said rotor comprises a propeller.

8. A rotor according to claim 1, wherein said liquid pump comprises a centrifugal liquid pump.

9. A rotor according to claim 1, wherein said liquid pump comprises an axial liquid pump.

10. A rotor according to claim 1, wherein said liquid pump comprises a turbine unit.

11. A rotor according to claim 1, wherein said liquid pump comprises a propulsion unit.