Flow machine, and flow guiding element for a flow machine

• US 10,634,164 B2
• Filed: 01/22/2014
• Issued: 04/28/2020
• Est. Priority Date: 02/08/2013
• Status: Active Grant

• Current Assignee: Sulzer Management AG (Sulzer AG)
• Original Assignee: Sulzer Management AG (Sulzer AG)
• Inventors: Rodrigues, Arnaldo
• Primary Examiner(s): Wan, Deming
• Application Number:
  US14/761,846
• Publication Number:
  US 20150361990A1
• Time in Patent Office: 2,288 Days
• Field of Search: 4152082, 4152083, 415204, 415206, 415184-186, 415187, 4152111, 4152112
• CPC Class Codes: F01D 25/24 Casings modified for heating or cooling F01D25/14; Casing parts, e.g. diaphragms, casing fastenings casings for rotary machines or engines in general F16M ; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045
• CPC Class Codes: F01D 5/06 Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections F01D5/022, F01D5/023 take precedence
• CPC Class Codes: F01D 9/02 Nozzles; Nozzle boxes; Stator blades; Guide conduits , e.g. individual nozzles nozzle boxes F01D9/047
• CPC Class Codes: F04D 1/006 double suction pumps
• CPC Class Codes: F04D 1/06 Multi-stage pumps F04D1/02, F04D13/10 take precedence
• CPC Class Codes: F04D 17/105 with double suction
• CPC Class Codes: F04D 17/12 Multi-stage pumps
• CPC Class Codes: F04D 29/22 specially for centrifugal pumps
• CPC Class Codes: F04D 29/28 for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
• CPC Class Codes: F04D 29/426 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/441 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/445 especially adapted for liquid pumps

Abstract

A flow machine includes a rotor rotatably arranged about an axis of rotation in a rotor space of a housing. For energy exchange between a flow energy of a flowing fluid and a mechanical rotational energy, the fluid can be supplied to the housing of the flow machine in so as to bring the fluid into flowing contact with the rotor for the energy exchange and can be led out of the housing of the flow machine. A flow guiding element running about the axis of rotation in a peripheral direction of the rotor is disposed in the rotor space between an inner wall of the rotor space and the rotor in such a way that the rotor is surrounded by the flow guiding element over a predeterminable axial width.

Claims

1. A flow guiding element for a pump, comprising:

a body element extending about an axis of rotation in a peripheral direction of a rotor, and being disposed in a rotor space between an inner wall of the housing and the rotor such that the rotor is surrounded by the body element in a region of an inlet lip, and

the body element has a predetermined axial width approximately corresponding to an axial width of the rotor, and, in operation, the flowing fluid impinges the flow guiding element in a radially oriented direction relative to the axis of rotation, and the flow guiding element enables the flowing fluid to flow over two axial ends thereof.

2. A pump, comprising:

a housing defining a rotor space;

a rotor arranged about an axis of rotation in the rotor space of the housing,

the housing being configured so as to enable a flowing fluid to exchange energy with the rotor and, after the energy exchange, to lead the flowing fluid out of the housing; and

a flow guiding element extending about the axis of rotation in a peripheral direction of the rotor, and being disposed in the rotor space between an inner wall of the housing and the rotor such that the flow guiding element surrounds the rotor, in a region of an inlet lip, and

the flow guiding element has a predetermined axial width approximately corresponding to an axial width of the rotor, and, in operation, the flowing fluid impinges the flow guiding element in a radially oriented direction relative to the axis of rotation, and the flowing guiding element enables the flowing fluid to flow over two axial ends thereof.

3. The pump in accordance with claim 2, wherein

the flow guiding element is a cylindrical flow ring having the predetermined width at a radial spacing from the axis of rotation in the peripheral direction around the rotor.

4. The pump in accordance with claim 2, wherein

the flow guiding element has a cross-section that is rectangular, at least section-wise, or has a droplet shape at least section-wise.

5. The pump in accordance with claim 2, wherein

the flow guiding element includes a throughflow opening.

6. The pump in accordance with claim 2, wherein

the flow guiding element has a surface extending in an axial direction with a structured surface.

7. The pump in accordance with claim 6, wherein

the structed surface is a periodically structured interface extending in the peripheral direction.

8. The pump in accordance with claim 2, wherein

the flow guiding element has a marginal surface extending in a radial direction with a structured surface.

9. The pump in accordance with claim 8, wherein

the structured interface is a periodically structured surface extending in the peripheral direction.

10. The pump in accordance with claim 2, wherein

the flow guiding element is multipart flow guiding element including at least two radially interleaved part elements concentric to one another.

11. The pump in accordance with claim 2, wherein

the flow guiding element is a multipart flow guiding element including at least two mutually axially offset axial part elements arranged alongside one another.

12. The pump in accordance with claim 2, wherein

the flow guiding element is secured to an attachment mechanism at the housing, the attachment mechanism being arranged parallel to the axis of rotation.

13. The pump in accordance with claim 2 further comprising

a guide vane disposed on the flow guiding element, and being configured to guide the fluid.

14. The pump in accordance with claim 13, wherein

the guide vane extends at a one of a predetermined radial angle of inclination from the flow guiding element in a radial direction towards the inner wall of the housing and at a predetermined axial angle of inclination to the flow guiding element in the axial direction towards the inner wall of the rotor space.

15. The pump in accordance with claim 2, wherein

the pump is a double pump.

16. The pump in accordance with claim 2, wherein

the flow guiding element has a periodically structured surface extending in the peripheral direction.

17. The pump in accordance with claim 2, wherein

the flow guiding element is secured to an attachment mechanism at the housing, the attachment mechanism being arranged perpendicular to the axis of rotation.

18. The pump in accordance with claim 2, wherein

the flow guiding element is secured to an attachment mechanism at the housing, the attachment mechanism being arranged transverse to the axis of rotation.

19. The pump in accordance with claim 2 further comprising

a wall guide vane disposed on the inner wall of the housing, and being configured to guide the fluid.

20. The pump in accordance with claim 2, wherein

the pump is a multistage pump having a plurality of rotors.

21. A pump, comprising:

a housing defining a rotor space;

a rotor arranged about an axis of rotation in the rotor space of the housing,

the housing being configured so as to enable a flowing fluid to exchange energy with the rotor and, after the energy exchange, to lead the flowing fluid out of the housing; and

a flow guiding element extending about the axis of rotation in a peripheral direction of the rotor, and being disposed in the rotor space between an inner wall of the housing and the rotor such that the flow guiding element surrounds the rotor in a region of an inlet lip, and

the flow guiding element has a predetermined axial width and, in operation, the flowing fluid impinges the flow guiding element in a radially oriented direction relative to the axis of rotation, and the flow guiding element enables the flowing fluid to flow over at least one axial end thereof,

the flow guiding element being a cylindrical flow ring having the predetermined width, approximately corresponding to an axial width of the rotor, at a radial spacing from the axis of rotation in the peripheral direction around the rotor, and the predetermined width of the flow guiding element reducing in a radial direction towards the rotor.