CN104204537B

CN104204537B - Centrifugal pump and product series of centrifugal pumps

Info

Publication number: CN104204537B
Application number: CN201380008473.XA
Authority: CN
Inventors: H-P.赫德尔; N.卡施特鲁普; J.帕伦; J.施卡图拉; H.魏巴尔特
Original assignee: KSB AG
Current assignee: KSB AG
Priority date: 2012-02-08
Filing date: 2013-02-07
Publication date: 2020-06-16
Anticipated expiration: 2033-02-07
Also published as: BR112014019221A2; BR112014019221A8; DK2812578T3; DE102013201902A1; US20150369256A1; EP2812578A1; CN104204537A; WO2013117617A1; PL2812578T3; HUE044741T2; ES2729832T3; EP2812578B1

Abstract

The invention relates to a centrifugal pump, in which at least a pump housing (1), a bearing block assembly (10) connected directly or indirectly to the pump housing (1), a housing cover (5) arranged between the pump housing (1) and the bearing block assembly (10), a rotatably driven shaft (13) mounted in the bearing block assembly (10) and extending coaxially to an axis of rotation (A) through the bearing block assembly (10) and the housing cover (5) into the pump housing (1), and an impeller (16) arranged in the pump housing (1) and fixed to the shaft (13) are provided as components. According to the invention, at least two standards specify the components (1,5,10,13,16), wherein the interface regions (8,11,18,21,25) of a large number of components (1,5,10,13,16) of the same type specified by the standards, which are not considered in the standards, are geometrically identical. The invention is not yet directed to a product line of centrifugal pumps in the case of the use of such centrifugal pumps.

Description

Centrifugal pump and product series of centrifugal pumps

Technical Field

The invention relates to a centrifugal pump (kreiselimpe) in which at least a pump housing, a bearing block arrangement connected directly or indirectly to the pump housing, a housing cover arranged between the pump housing and the bearing block arrangement, a rotatably drivable shaft which is mounted in the bearing block arrangement and extends coaxially to the axis of rotation into the pump housing via the bearing block arrangement and the housing cover, and an impeller (Laufrad) which is arranged in the pump housing and is fixed on the shaft are provided as components. The invention also relates to a product line of centrifugal pumps in the case of the use of such centrifugal pumps.

Background

Centrifugal pumps themselves are widely spread and find application in many fields for transporting fluids.

DE 2327262 a discloses a device for selectively providing fixedly and releasably attached centrifugal pumps made of replaceable standard parts, which has a plurality of different replaceable housings each with the same rear opening. The apparatus further comprises: a plurality of different replaceable impellers, each of which can be positioned in each housing; a plurality of different, exchangeable drive shafts, each of which can be introduced into each housing and in which can be operatively connected to each impeller; a large number of different interchangeable connectors, each of which has the same connection mechanism at the end in order to be able to connect each given connector with the rear end of each housing. The equipment furthermore comprises different exchangeable drive mechanisms, each of which can be connected with each connection piece and each pump drive shaft for driving the pump, and different exchangeable seals which, together with a selected connection piece, serve as openings for closing off the rear of a selected housing, wherein at least one connection piece and an associated seal can be connected between the selected housing and the selected drive in order to form the desired fixedly coupled centrifugal pump, and wherein at least one further connection piece and an associated seal, instead of the first-mentioned connection piece and the associated seal, are optionally and alternatively connected in order to be mounted between the selected housing and the selected drive in order to form the releasably coupled centrifugal pump.

Different standards apply depending on which industrial field the pump is operating in. For example, international valid water standard EN 733 and chemical standard ISO 2858 are mentioned here. Since these standards provide different geometries for certain components, in particular, the respective characteristic shape of the pump has already been established over time for different fields of use. This leads to a large component diversity and the disadvantages associated therewith and therefore ultimately to higher production costs.

Disclosure of Invention

The aim of the invention is to further reduce the number of different components required for producing a centrifugal pump, in particular corresponding to the standard.

According to the invention, at least two of the components are specified at least in two standards, wherein a plurality of interface regions of the same type of component specified in the standard, which are not considered in the standard, are geometrically identical.

The coordination of the interface regions at and/or between the components creates preconditions for complexity reduction and contains a high cost reduction potential.

Since the interface regions of a large number of identical components of the same type, which are specified in at least two standards (for example different pump casings of a product family), are designed to be geometrically identical (wherein the standards do not take account of the interface regions), individual product families can be produced with fewer stored components (i.e. pump casing, housing cover, bearing block assembly, shaft, impeller) covering the standard (norm ü bergeifend).

According to one embodiment of the invention, the interface regions formed by the pump housing and the housing cover at their contact surfaces are geometrically identical.

A further reduction in the number of different components can be achieved by the interface region formed by the impeller and the pump housing at their interacting faces being geometrically designed to be identical.

The number of components of the same type can be further reduced if the interface regions formed by the impeller and the housing cover at their interacting faces are geometrically configured to be identical.

The configuration of the interface regions formed by the bearing seats and the housing covers at their co-acting faces to be geometrically identical further reduces the number of components of the same type by a factor of several.

The same type of component is also reduced when the interface region formed by the impeller and the shaft at their contact faces is geometrically configured to be the same.

The object of the invention is also solved by a product family of centrifugal pumps in the case of the application of the above-mentioned centrifugal pump. This creates a product line of centrifugal pumps which, with a small number of different components to be stored, provides a large number of centrifugal pumps with different structural dimensions, different materials and/or different ranges of use.

Drawings

Embodiments of the present invention are described in the drawings and are subsequently explained in more detail. Wherein

FIG. 1 shows a centrifugal pump with a housing cover clamped between the housing and a bearing block, and

fig. 2 shows a centrifugal pump with a housing cover which is fastened to the housing by means of screws.

Detailed Description

Fig. 1 shows a centrifugal pump for a fluid-conducting system, wherein the centrifugal pump has a pump housing 1 with a suction opening 2 and a discharge opening 3. On the side of the pump housing 1 opposite the intake opening 2, the pump housing 1 has an annular or cylindrical opening 4 which can be closed in a fluid-tight manner by means of a housing cover 5. The housing cover 5 rests against the support surface 6 at the opening 4 of the pump housing 1. A shoulder 7 is molded on the support surface 6, which partially surrounds the housing cover 5 and fixes the housing cover 5 in the radial direction. The pump housing 1 and the housing cover 4 form, at their contact surfaces, geometrically identically configured interface regions 8.

The bearing block arrangement 10 is fastened directly to the pump housing 1 by means of screws 9 or the bearing block arrangement 10 is connected to the pump housing 1 and the bearing block arrangement 10 clamps the housing cover 5 in such a way that it is axially and radially immovably located between the pump housing 1 and the bearing block arrangement 10. If required, for example if the bearing block is to be thermally decoupled from the pump housing 1 or the housing cover 5, the bearing block assembly 10 can additionally have components which are not depicted in fig. 1, in particular components which are referred to in the generic term as lamp cages (larene). The housing cover 5 and the bearing block arrangement 10 form an interface region 11 at their contact surfaces, which is geometrically identical.

In the bearing block assembly 10, two bearings 12 are arranged, which rotatably receive a shaft 13 extending into the pump housing 1 through the bearing block assembly 10 and the housing cover 5 coaxially with the axis of rotation a. The hub 15 of the impeller 16 is fitted onto the first shaft end 14 of the shaft 13 projecting into the pump housing 1 and is securely fastened to the shaft 13 by means of a nut 17. Alternatively to the nut 17, a screw or other fastener may be used for securing the impeller 16 and the shaft 13 together. The shaft 13 and the impeller 16, in particular the hub 15 of the impeller 16, form, at their contact surfaces, a geometrically identically configured interface region 18.

At a second shaft end 19 of the shaft 13 opposite the first shaft end 14, a motor, not shown, is coupled, which drives the shaft 13 in rotation about the axis of rotation a.

In the region of the intake opening 2, a split ring (Spaltring)20 is connected to the pump housing 1 in the interior of the pump housing 1 by means of a press fit. The split ring 20 and impeller 13 are spaced from each other so that a gap is formed between the split ring 20 and the impeller 16. The pump casing 1, in particular the split ring 20 and the impeller 16 of the pump casing 1, form geometrically identically configured interface regions 21 at their cooperating faces forming the sealing gap. Alternatively, the split ring 20 can also be integrated into the pump housing 1. Furthermore, the split ring 20 can be fixed as a rolling ring (lafring) on the impeller 16 or integrated into the impeller.

The housing cover 5 has an annular section 22 which projects into the interior of the pump housing 1 and is configured coaxially with the axis of rotation a, at the free end of which a further snap ring 23 is arranged on the circumferential side, which is preferably likewise connected to the housing cover 5 by means of a press fit. The ring section 24 provided on the impeller 16 at least partially surrounds the ring section 22 of the housing cover 5, in particular the split ring 23, wherein the split ring 23 and the impeller 13 are spaced apart from one another, so that a gap is formed between the split ring 23 and the impeller 13. The housing cover 5, in particular the split ring 23 of the housing cover 1, and the impeller 13 form, at their interacting, approximately contacting surfaces, an interface region 25 which is of geometrically identical design. Alternatively, the split ring 23 can also be integrated into the housing cover 5. Furthermore, it is possible to arrange or to form the split ring 23 as a rolling ring at the impeller 16, as with the split ring 20.

In the embodiment shown in fig. 2, a housing cover 5 closing the opening 4 of the pump housing 1 is fastened to the pump housing 1 by means of screws. It is thereby possible to connect the pump housing 1 shown in fig. 1 with a smaller, in particular reduced diameter, bearing block assembly 10 or vice versa, connecting the bearing block assembly 10 with a larger pump housing 1. The connection of the connecting bearing block arrangement 10 to the pump housing 1 is effected via the housing cover 5, that is to say indirectly. The pump housing 1 and the housing cover 5 form an interface region 8 at the face where they contact.

The housing cover 5 has, on the other hand, one or several means, in particular threaded holes 26, into which screws 27 can be screwed, with which screws 27 the bearing block arrangement 10 is screwed to the housing cover 5. Other fasteners such as bolts to which nuts are screwed are also contemplated. The bearing block assembly 10 and the housing cover 4 form an interface region 11 at their contact surfaces.

Since the

interface regions

8,11,18,21,25 of a large number of components of the same type, which are specified in at least two standards (for example different pump casings 1 of a product series), are designed geometrically identical, wherein the standards do not take into account the

interface regions

8,11,18,21,25, it is possible to produce individual product series with a small number of stored components (i.e. pump casing 1, casing cover 5, bearing block assembly 10, shaft 13, impeller 16).

List of reference numerals

1. Pump casing

2. Suction inlet

3. Outflow opening

4. Opening of the container

5. Shell cover

6. Support surface

7. Convex shoulder

8. Interface area

9. Screw nail

10. Bearing block assembly

11. Interface area

12. Bearing assembly

13. Shaft

14. First shaft end

15. Wheel hub

16. Impeller

17. Nut

18. Interface area

19. Second shaft end

20. Split ring

21. Interface area

22. Annular segment

23. Split ring

24. Annular segment

25. Interface area

26. Threaded hole

27. Screw nail

Axis of rotation A

Claims

1. A centrifugal pump is provided with at least one component

A pump casing is arranged on the upper portion of the pump body,

a bearing housing assembly connected directly or indirectly to the pump housing,

a housing cover disposed between the pump housing and the bearing housing assembly,

a rotatably driven shaft supported in the bearing housing assembly and extending into the pump housing coaxially with the axis of rotation through the bearing housing assembly and the housing cover, and

an impeller disposed in the pump casing and fixed to the shaft,

it is characterized in that the preparation method is characterized in that,

at least two of the components (1,5,10,13,16) are specified at least in a water standard EN 733 and a chemical standard ISO 2858, wherein the interface regions (8,11,18,21,25) of a plurality of components (1,5,10,13,16) of the same type specified in the standard, which are not considered in the standard, are geometrically identical.

2. Centrifugal pump according to claim 1, characterized in that the interface areas (8) formed by the pump casing (1) and the casing cover (5) at their contact faces are constructed geometrically identical.

3. Centrifugal pump according to one of claims 1 or 2, characterized in that the interface areas (21) formed by the pump casing (1) and the impeller (16) at their co-acting faces are constructed geometrically identical.

4. A centrifugal pump according to any one of claims 1 or 2, characterized in that the interface areas (25) formed by the casing cover (5) and the impeller (16) and at their co-acting faces are constructed geometrically identical.

5. A centrifugal pump according to any one of claims 1 or 2, wherein the interface areas (11) formed by the casing cover (4) and the bearing block assembly (10) at their contact faces are configured geometrically identical.

6. A centrifugal pump according to any one of claims 1 or 2, wherein the interface areas (18) formed by the shaft (13) and the impeller (16) at their contact faces are configured geometrically identical.