DE102011117996A1 - Rotation pump, particularly combined submersible-flat suction-rotation pump, has pump housing with centrally arranged pump inlet opening and pump outlet opening - Google Patents

Abstract

The invention relates to a rotary pump, in particular a combined immersion / Flachabsaug rotary pump (1), with an electric drive, a pump housing (2) with a centrally arranged below the pump inlet opening (4) and at least one pump outlet opening, wherein between the Pumpenein- and pump outlet openings an impeller for fluid delivery is arranged, which has at least one blade ring, which has a ground clearance (h) to a footprint of the pump (1) and a Verstellkranz (3) for adjusting the ground clearance (h) is mounted. The invention is characterized in that for the height adjustment of the adjusting ring (3) a plurality of at least partially inclined to the circumferential direction guide surfaces (6.1, 6.2) and by these guide surfaces (6.1, 6.2) supported guide knobs (7) are arranged such that a relative rotation between Pump housing (2) and Verstellkranz (3) causes a change in the ground clearance (h).

Description

The invention relates to a rotary pump, in particular a combined immersion / Flachabsaug-rotary pump, with an electric drive, a pump housing with a centrally arranged below the pump inlet opening and at least one pump outlet opening, wherein between the Pumpenein- and pump outlet openings, an impeller for fluid delivery is arranged, which at least has a blade ring, which has a ground clearance to a footprint of the pump and a Verstellkranz is attached to adjust the ground clearance.

A similar pump is from the script DE 10 2005 031 420 B4 known. In this document, a pump is shown which has a high flexibility with respect to the transport of solids laden liquids by the pump is equipped with a plurality of blade rings having a centrally disposed impeller inlet opening and at the same time a way to adjust the distance of the impeller to the respective footprint of the pump. The adjustment of the distance of the impeller to the footprint of the pump is achieved by the bottom of the suction a basket is mounted, which is equipped with a bayonet catch with only vertical - ie parallel to the axis of rotation of the pump - running breakthroughs with Höhenrastierungen.

The purpose of this height adjustment is that this makes the pump at low setting particularly well suited for Flachabsaugung, so it also works with good effect when the water level to the pump is relatively low. In this case, the pump is fed laterally by inlet openings lying on the ground, wherein the impeller is arranged as close to the ground, so that it promotes well even at low water levels. This position is therefore particularly suitable for the extraction of water standing flat on the ground. With a high setting, larger inlet openings are opened to the pump and the possible throughput of the pump increases due to lower flow resistance. Such a position is thus used when the pump can dive deep into the water and the highest possible pump throughput is desired.

It is an object of the invention to find a pump which has an improved height adjustment.

This object is solved by the features of independent claim 1. Advantageous developments of the invention are the subject of the subordinate claims.

It has been recognized that the height adjustment of the exchange pump with respect to their handling and assembly requirements can be improved by the fact that for adjusting the height of the Verstellkranzes at least partially inclined obliquely to the circumferential direction guide surfaces and guide surfaces supported by these guide knobs are arranged such that a relative rotation between the pump housing and Verstellkranz causes a change in the ground clearance.

According to this basic idea, the improvement of a rotary pump, in particular a combined immersion / Flachabsaug rotary pump, proposed with an electric drive, a pump housing with a centrally arranged below pump inlet opening and at least one pump outlet, wherein between the Pumpenein- and pump outlet openings arranged an impeller for fluid delivery is, which has at least one blade ring, which has a ground clearance to a footprint of the pump, and a Verstellkranz for adjusting the ground clearance is mounted. According to the invention, the improvement is that for adjusting the height of the Verstellkranzes several at least partially inclined to the circumferential direction guide surfaces and guide surfaces supported by these guide knobs are arranged such that a relative rotation between the pump housing and Verstellkranz causes a change in the ground clearance.

It when the guide surfaces are designed as scenes, preferably in the form of a groove open on one side, and engage the guide knobs in the scenes is particularly favorable. As a result, the guide knobs are clearly fixed by opposite guide surfaces in their height position, so that each rotation angle between the pump housing and Verstellkranz defines a clear distance between the impeller or between the pump inlet opening and footprint.

Furthermore, it may be advantageous if the guide surfaces - and thus possibly also the scenes - each have a horizontally extending portion at the beginning and / or end. At such horizontal sections and an increased pressure on the pump from above can not produce any rotational effect, so that this position does not change independently. In the context of the invention is also an embodiment with one or more horizontal sections, each defining positioning planes for the height adjustment between maximum and minimum height adjustment.

It is also favorable if the scenes each have a vertically extending portion which is open at one end in order to introduce the guide nubs can.

For reasons of stability, it is particularly advantageous if the guide surfaces are arranged on the housing side and the guide knobs Verstellkranzseitig, but is also the embodiment of a mechanical reversal within the scope of the invention, in which case the guide surfaces verstellkranzseitig and the guide knobs are arranged on the housing side.

Furthermore, it is proposed to arrange at least three pairs of guide surfaces and guide knobs, preferably four pairs of guide surfaces and guide knobs. As a result, a flowing and non-hooking course of rotation between the pump housing and Verstellkranz is ensured. Furthermore, the guide surfaces and guide nubs should each be arranged on an imaginary cylinder surface and preferably symmetrically, preferably rotationally symmetrical, distributed around the circumference. The guide surfaces thus run approximately helically on the imaginary cylinder surface.

To avoid a self-unintentional height adjustment is also proposed to attach to the pump housing and Verstellkranz at least one locking device through which engages a relative rotation between the pump housing and Verstellkranz in at least one position.

Here, the Rastiervorrichtungen may consist of at least one notch and at least one locking lug, which are distributed around the circumference, that any desired positioning, for example, each horizontally extending portion, a detent is associated. In this case, for example, a notch corresponding to the number of horizontal sub-surfaces number of locking lugs be assigned such that in each case at a relative rotational angle between the pump housing and Verstellkranz, in which the guide knobs are in a horizontal portion of the guide surface, a snap between the locking lugs takes place in the notches. The detents and notches can be arbitrarily and alternately mounted on the side of the pump housing or the Verstellkranzes.

In the following the invention with reference to the preferred embodiments with reference to the figures will be described in more detail, with only the features necessary for understanding the invention features are shown.

They show in detail:

1 : Side view of a rotary pump according to the invention in a compressed / low position;

2 : Side view of the rotary pump 1 in extended / high position;

3 : Angled view of the rotary pump 1 ;

4 : Side view of the rotary pump 1 without adjustable ring;

5 : Variable ring of the rotary pump in an oblique view;

6 : Side view of the intermediate part of the pump housing;

7 : Side view of the adjustable ring;

8th : Side view of the lower part of the pump housing.

The 1 and 2 show a rotary pump according to the invention 1 , with respect to their internal structure - with the exception of the height adjustment - similar to that in the document DE 10 2005 031 420 B4 described in detail pump is constructed. Thus, the pump has an electric drive, a pump housing 2 with a pump inlet opening 4 and a pump outlet opening. Between the pump inlet opening 4 and the pump outlet opening is arranged an impeller for conveying liquid with at least one blade ring, which is the footprint 5 the pump has a variable ground clearance h.

The ground clearance can be due to a relative rotation of the bottom of the pump 1 or on the pump housing 2 attached Verstellkranzes 3 opposite the pump housing 2 be adjusted. In the 1 the ground clearance h is minimal because the Verstellkranz 3 maximum to the pump housing 2 is postponed while in the 2 the ground clearance h is set to the maximum. The achievable height difference is indicated by Δh.

The 3 shows the pump according to the invention 1 in an oblique view from below in a fully compressed state. Here is the pump inlet opening 4 recognizable, their distance to the footprint using the Verstellkranzes 3 is adjustable.

For a better representation of the height adjustment mechanism is in the 4 the pump 1 without Verstellkranz and in the 5 the adjustment ring 3 shown separately. In the 4 you can see three of the four scenes 6 in which the guide nubs 7 of the adjustment wreath 3 out 5 be guided. As you can see, the scenery becomes 6 each of two opposite guide surfaces 6.1 and 6.2 formed in the form of a groove. These scenes run spirally on the cylindrical in this area formed wall of the pump housing 2 from the bottom up. At the beginning and end are each horizontal sections 6.3 and 6.4 arranged, each describing the end positions of the height adjustment and where due to the non-existing slope of the scenes, the risk of unintentional height adjustment is avoided. In addition, in the area of the pump housing 2 notches 8.1 provided in the corresponding angular position the locking lugs 8.2 on the adjustable ring 3 can engage in order to prevent further slight twisting. With appropriate force, the locking lugs 8.2 but again from the notches 8.1 disengage and allow a rotation.

For easy installation of the adjustment ring 3 to the pump housing 2 This is executed in several parts and thus from a shell 2.1 , an intermediate part 2.2 and a lower part 2.3 composed. The 6 to 8th show in the assembly sequence from top to bottom, first the intermediate part 2.2 the pump housing with the upper guide surfaces 6.1 , At this intermediate part 2.2 is from below the Verstellkranz 3 attached and then from below the lower part 2.3 with the bottom guide surfaces 6.2 assembled. This will be the locking lugs of Verstellkranzes 3 from the guide surfaces 6.1 and 6.2 included, who together set the scenes 6 form.

It is understood that the abovementioned features of the invention can be used not only in the particular combination indicated, but also in other combinations or in isolation in connection with rotary pumps, without departing from the scope of the invention. It is also within the scope of the invention to perform the illustrated embodiment of the height adjustment in mechanical reversal.

LIST OF REFERENCE NUMBERS

1

pump

2

pump housing

2.1

Pump housing top

2.2

Pump housing intermediate part

2.3

Pump Housing base

3

Verstellkranz

4

Pump inlet opening

5

footprint

6

scenery

6.1

upper guide surface

6.2

lower guide surface

6.3

horizontal section

6.4

horizontal section

7

guide knobs

8.1

notch

8.2

locking lug

H

ground clearance

.delta.h

Height difference

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005031420 B4 [0002, 0025]

Claims (11)

Rotary pump, in particular combined immersion / flat suction rotary pump ( 1 ), with: 1.1. an electric drive, 1.2. a pump housing ( 2 ) with a pump inlet opening arranged centrally below ( 4 ) and at least one pump outlet opening, 1.3. wherein between the Pumpenein- and pump outlet openings, an impeller for fluid delivery is arranged, which has at least one blade ring, which leads to a footprint of the pump ( 1 ) has a ground clearance (h), 1.4. and an adjustment ring ( 3 ) is mounted for adjusting the ground clearance (h), characterized in that 1.5. for height adjustment of the adjustment ring ( 3 ) a plurality of at least partially inclined to the circumferential direction increasing guide surfaces ( 6.1 . 6.2 ) and through these guide surfaces ( 6.1 . 6.2 ) supported guide knobs ( 7 ) are arranged such that a relative rotation between the pump housing ( 2 ) and Verstellkranz ( 3 ) causes a change in the ground clearance (h). Rotary pump ( 1 ) according to the preceding claim 1, characterized in that the guide surfaces ( 6.1 . 6.2 ) as backdrops ( 6 ) are formed and the guide knobs ( 7 ) in the wings ( 6 ) intervene. Rotary pump ( 1 ) according to one of the preceding claims 1 to 2, characterized in that the guide surfaces ( 6.1 . 6.2 ) at the beginning and / or at the end of a horizontally extending section ( 6.3 . 6.4 ) exhibit. Rotary pump ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the guide surfaces ( 6.1 . 6.2 ) on the housing side and the guide knobs ( 7 ) are arranged Verstellkranzseitig. Rotary pump ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the guide surfaces ( 6.1 . 6.2 ) Verstellkranzseitig and the guide knobs ( 7 ) are arranged on the housing side. Rotary pump ( 1 ) according to one of the preceding claims 1 to 5, characterized in that at least three pairs of guide surfaces ( 6.1 . 6.2 ) and guide studs ( 7 ) are arranged. Rotary pump ( 1 ) according to the preceding claim 6, characterized in that four pairs of guide surfaces ( 6.1 . 6.2 ) and guide studs ( 7 ) are arranged. Rotary pump ( 1 ) according to one of the preceding claims 1 to 7, characterized in that the guide surfaces ( 6.1 . 6.2 ) and guide studs ( 7 ) are each arranged on an imaginary cylinder surface. Rotary pump ( 1 ) according to one of the preceding claims 1 to 8, characterized in that the guide surfaces ( 6.1 . 6.2 ) and guide studs ( 7 ) are arranged symmetrically, preferably rotationally symmetrical. Rotary pump ( 1 ) according to one of the preceding claims 1 to 9, characterized in that on the pump housing ( 2 ) and Verstellkranz ( 3 ) at least one locking device ( 8.1 . 8.2 ) is mounted, by which a relative rotation between the pump housing ( 2 ) and Verstellkranz ( 3 ) engages in at least one position. Rotary pump ( 1 ) according to the preceding claim 10, characterized in that the Rastiervorrichtungen from at least one notch ( 8.1 ) and at least one latch ( 8.2 ) consist.

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