Impeller pump

Patent metadata

Field	Value
Publication number	US-10808705-B2
Application number	US-201816201139-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Dec 1, 2017
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

An impeller pump has a pump chamber with an inlet and an outlet, and an impeller in the pump chamber. An auxiliary outlet out of the pump chamber together with an auxiliary outlet flap is provided, the auxiliary outlet flap having a closed position and at least one open position and being rotatable or movable between the positions. In the closed position, the auxiliary outlet flap closes off the auxiliary outlet and, in each of the open positions, the auxiliary outlet flap at least partially opens the auxiliary outlet. The auxiliary outlet flap has an actuator and is subjected to force loading by the actuator, such that the auxiliary outlet flap is moved automatically from the closed position into one of the open positions if the auxiliary outlet flap is free from fluid flow in a direction of rotation of the impeller.

First claim

The invention claimed is:

1. An impeller pump having
a pump chamber with an inlet into said pump chamber, and with an outlet out of said pump chamber,
an impeller in said pump chamber,
a direction of rotation of said impeller for pumping fluid from said inlet to said outlet, wherein an auxiliary outlet out of said pump chamber together with an auxiliary outlet flap is provided, wherein said auxiliary outlet flap:
has a closed position and at least one open position,
is designed to be movable between said closed position and said at least one open position,
in said closed position, closes off said auxiliary outlet and, in each of said open positions, at least partially opens up or opens said auxiliary outlet,
has an actuating means and is subjected to force loading by said actuating means such that said auxiliary outlet flap is moved automatically from said closed position into one of said open positions if said auxiliary outlet flap is free from fluid flow in said direction of rotation of said impeller for pumping fluid from said inlet to said outlet.

2. The impeller pump according to claim 1 , wherein said auxiliary outlet flap is moved by said actuating means into that open position of said multiple open positions which has a maximum degree of opening or in which said auxiliary outlet flap is at a maximum distance from said closed position.

3. The impeller pump according to claim 1 , wherein said impeller pump has spring means as actuating means for subjecting said auxiliary outlet flap to force loading for said movement.

4. The impeller pump according to claim 3 , wherein said spring means are made from plastics.

5. The impeller pump according to claim 3 , wherein said spring means comprises a voluminous block body.

6. The impeller pump according to claim 3 , wherein said spring means is selected from the following group: leaf spring, helical spring, spiral spring and helical-spiral spring.

7. The impeller pump according to claim 1 , wherein said pump has sealing means at said auxiliary outlet or at said auxiliary outlet flap.

8. The impeller pump according to claim 7 , wherein said sealing means is injection-molded onto said pump housing in a multi-component injection molding process.

9. The impeller pump according to claim 7 , wherein said sealing means comprise a sealing rubber.

10. The impeller pump according to claim 7 , wherein said sealing means are formed as a labyrinth seal with a stepped profile of a sealing surface between said auxiliary outlet and said auxiliary outlet flap.

11. The impeller pump according to claim 1 , wherein said auxiliary outlet flap, in said closed position, forms a continuous continuation of said profile of said pump chamber or of a wall of said pump chamber in a region around said auxiliary outlet.

12. The impeller pump according to claim 11 , wherein said auxiliary outlet flap, in said closed position, forms a continuous continuation of said profile of said pump chamber or of a wall of said pump chamber in said region around said auxiliary outlet, with roundings and archings corresponding to said region of said pump chamber surrounding said auxiliary outlet.

13. The impeller pump according to claim 1 , wherein said auxiliary outlet flap has an inner side which, in said closed position, points toward said auxiliary outlet.

14. The impeller pump according to claim 13 , wherein said inner side of said auxiliary outlet flap is shaped so as to be convexly arched away from said auxiliary outlet.

15. The impeller pump according to claim 13 , wherein said inner side of said auxiliary outlet flap has a lateral wall with an angle of between 60° and 120° with respect to said outer side, which lateral wall extends away from said pump chamber in said direction of said auxiliary outlet or into said auxiliary outlet.

16. The impeller pump according to claim 15 , wherein, in an open position with said maximum degree of opening, said lateral wall at least partially still projects into said auxiliary outlet.

17. The impeller pump according to claim 16 , wherein, in said open position with said maximum degree of opening, said lateral wall runs, over its entire length in a direction away from an axis of rotation of said auxiliary outlet flap, with a free longitudinal outer edge within said auxiliary outlet.

18. The impeller pump according to claim 15 , wherein said lateral wall runs parallel to an encircling outer wall of said pump chamber.

19. The impeller pump according to claim 15 , wherein, in an open position with said maximum degree of opening, said lateral wall runs with a spacing of between 0.5 cm and 2 cm to an encircling outer wall of said pump chamber.

20. The impeller pump according to claim 1 , wherein said pump chamber is formed in ring-shaped fashion around said impeller, wherein said auxiliary outlet is arranged in an end surface of said pump chamber in an axial direction along said axis of rotation of said impeller.

21. The impeller pump according to claim 20 , wherein said an end surface of said pump chamber runs approximately in a plane of one of two cover surfaces of said impeller.

22. The impeller pump according to claim 20 , wherein, in said closed position, an outer side of said auxiliary outlet flap runs in said end surface, wherein, in an open position with said maximum degree of opening, said auxiliary outlet flap is situated close to said impeller.

23. The impeller pump according to claim 22 , wherein, in said closed position, said outer side of said auxiliary outlet flap runs in a continuous fashion in said end surface of said pump chamber.

24. The impeller pump according to claim 22 , wherein, in said open position with said maximum degree of opening, said auxiliary outlet flap is arranged with at most a 1 cm radial spacing to said impeller, wherein an inner side of said auxiliary outlet flap is arranged at least at an axial level of and radially outside said other cover surface of said impeller, such that fluid flows out of said impeller directly outward in a radial direction into said auxiliary outlet flap and into said auxiliary outlet.

25. The impeller pump according to claim 1 , wherein said auxiliary outlet leads out of said pump chamber in a radial direction or in a plane perpendicular to an axis of rotation of said impeller.

26. The impeller pump according to claim 25 , wherein said auxiliary outlet leads out of said pump chamber and out of a housing of said impeller pump.

Assignees

• Ego Elektro Geraetebau Gmbh

Inventors

• Albert Tobias

Classifications

• F04D29/4293

  Details of fluid inlet or outlet · CPC title

• A47L15/4285

  Water-heater arrangements (steam generating arrangements A47L15/4234) · CPC title

• F04D15/0016 Primary

  mixing-reversing- or deviation valves · CPC title

• F04D15/00

  Control, e.g. regulation, of pumps, pumping installations or systems · CPC title

• A47L15/4225

  Arrangements or adaption of recirculation or discharge pumps · CPC title