EP3004649A1

EP3004649A1 - Pump arrangement

Info

Publication number: EP3004649A1
Application number: EP14726122.6A
Authority: EP
Inventors: Patrick Drechsel; Markus Lay
Original assignee: KSB AG
Current assignee: KSB SE and Co KGaA
Priority date: 2013-05-24
Filing date: 2014-05-19
Publication date: 2016-04-13
Anticipated expiration: 2034-05-19
Also published as: RU2015148040A; AU2014270523A1; ZA201508250B; US20160108923A1; KR20160012136A; RU2670369C2; BR112015029322B1; AU2014270523C1; CN105431637A; JP6491196B2; WO2014187761A1; EP3004649B1; JP2016519252A; BR112015029322A2; AU2014270523B2; US10385860B2; DE102013008795B3; KR102125989B1; SG11201509124PA; ES2922414T3

Abstract

The invention relates to a pump arrangement (1), in particular a magnetic coupling pump arrangement, comprising an interior (11) formed by a pump housing (2) of the pump arrangement (1), a split case (10) which hermetically seals a chamber (19) surrounded by the split case from the interior (11) formed by the pump housing (2), an impeller shaft (20) which can be driven in a rotatable manner about a rotational axis (A), an impeller (23) which is arranged at one end of the impeller shaft (20), an inner rotor (24) which is arranged at the other end of the impeller shaft (20), and an outer rotor (38) which interacts with the inner rotor (24). According to the invention, the pump arrangement (1) has an adapter element (39) which connects the split case (10) to the pump housing (2) or to a component paired with the pump housing (2), in particular a housing cover (4), said adapter element comprising a mounting flange (40) which rests against a support surface (15) of the pump housing (2), in particular of the housing cover (4), on the face near the interior (11).

Description

pump assembly

The invention relates to a pump arrangement, in particular magnetic coupling pump arrangement, with an interior formed by a pump housing of the pump assembly, a split pot which hermetically seals a chamber enclosed by it against the interior formed by the pump housing, an impeller shaft rotatably driven about an axis of rotation arranged at one end of the impeller shaft impeller, arranged at the other end of the impeller shaft inner rotor and cooperating with the inner rotor outer rotor. Such a pump arrangement is known from DE 10 2004 003 400 A1, which has a drive rotor, which is designed as a common part for external drive elements, to increase the field of application. As a result, however, an increase in the scope is possible only to a certain degree. From a certain size an adjustment of the rotor size is inevitable.

From EP 0 814 268 A1 a modular kit for the production of pumps is known, which should offer the possibilities to produce pumps according to application needs arbitrarily from a few components. However, the proposed solution allows only the replacement of components that are assigned to a single size.

However, the above-mentioned documents do not take into account that, due to different rotational speeds, delivery heights, delivery volumes and densities of the conveying the medium, a large range of torques is required for one and the same hydraulic variable.

The object of the invention is to provide a magnetic coupling pump arrangement in which a large number of magnetic couplings with different diameters is available for a hydraulic variable and as many different hydraulic variables as possible can be used for a magnetic coupling size. Similarly, within a magnetic coupling size, different split wells, i. different pressure levels and / or materials, be usable.

The object of the invention is achieved by a split pot with the pump housing or with a component associated with the pump housing, in particular a

Housing cover, connecting adapter element with a mounting flange, which rests on the side near the interior of a contact surface of the pump housing, in particular the housing cover solved.

By using different adapter elements, a modular system is available that enables efficient size design for a hydraulic size with different magnetic coupling sizes or for a magnetic coupling size and different hydraulic sizes.

In a simple manner, therefore, by adapting the size and / or size of the adapter element, a magnetic coupling size can be adapted to different hydraulic sizes. As a result, the large required range of torques required for one and the same hydraulic variable by different speeds, delivery heights, delivery volumes and densities of the medium to be delivered is covered. It is no longer necessary to use the respective maximum coupling size for all combinations, but in each case the suitable magnetic coupling size can be adapted to a hydraulic variable, with corresponding advantages in terms of energy efficiency, eddy current losses and / or acquisition costs. Another advantage of the invention is the reduced number of components to be stored for a pump series. In a further embodiment, the contact surface has an area set back in the axial direction, into which a centering ring formed on the mounting flange engages, in the recessed area, on the one hand, a sealing ring can be arranged and, on the other hand, the adapter element can be precisely aligned and fluid-tight on the

Housing cover attachable.

By on the side opposite the mounting flange, the adapter element has a plurality of threaded holes for fastening the containment shell, it is possible within a magnetic coupling size different gap pots different Druckstu- or strengths and / or different materials to use or exchange.

According to the invention, a ring extending further into the interior in the axial direction is provided on the side opposite the mounting flange, which forms an attachment and prevents contact of the outer rotor with the containment shell.

In order to improve the flow guidance of the medium and for simpler and thus cost-effective production by casting, the outer contour of the adapter element has a substantially conical shape.

In this case, the adapter element preferably tapers substantially starting from the mounting flange to the ring.

According to a further embodiment, it is provided that in the direction

Housing cover facing end of the outer rotor has a radially circumferential projection. As a result, the radial distance of the outer rotor to the ring for normal operation can be produced exactly.

For the same reason, it is proposed that, alternatively or additionally, the projection is formed on the inside of the ring. In a further exemplary embodiment of the invention, it is provided that the end of the outer rotor pointing in the direction of the housing cover has a region with a reduced outer diameter. Thus, the mountability of the adapter element is ensured at small coupling diameters.

In a further advantageous embodiment, a bearing arrangement arranged in operative connection with the impeller shaft rotatably drivable about the rotation axis is arranged between impeller and inner rotor. In the context of the invention it is proposed that in a further embodiment that a spring device is arranged between the inner rotor and the bearing arrangement.

According to the invention, in one embodiment, between the spring device and the inner rotor, there is a spacer sleeve which is pushed onto the rotor shaft and by means of which the inner rotor passes deeper into the outer rotor in the axial direction. Thus, the magnets of the inner rotor and the magnets of the outer rotor are optimally aligned with each other to ensure optimum power transmission from outer rotor to inner rotor.

The object of the invention is further achieved by a modular construction kit for producing a pump arrangement according to the invention.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below. It shows the

Fig. 1 shows a longitudinal section through a magnetic coupling pump assembly, the

Fig. 2 shows the longitudinal section through the magnetic coupling pump assembly of FIG. 1 with an adapter element according to the invention, the 3 shows the longitudinal section through the magnetic coupling pump arrangement according to FIG. 1 with a further adapter element according to the invention, FIG

4 shows the longitudinal section through a magnetic coupling pump arrangement with a

Heat barrier serving the housing cover and an inventive

Adapter element according to FIG. 2.

FIG. 1 shows a pump arrangement 1 in the form of a magnetic coupling pump arrangement. The pump arrangement 1 has a multi-part pump housing 2 of a circular sepip including a designed as a spiral housing hydraulic housing 3, a housing cover 4, a bearing support lantern 5, a bearing support 6 and a bearing cap 7.

The hydraulic housing 3 has an inlet opening 8 for sucking in a pumped medium and an outlet opening 9 for ejecting the pumped medium. Of the

Housing cover 4 is arranged on the inlet opening 8 opposite side of the hydraulic housing 3. On the side facing away from the hydraulic housing 3 of the housing cover 4, the bearing support lantern 5 is attached. The bearing carrier 6 is attached to the housing cover 4 opposite side of the bearing support lantern 5. The bearing cap 7 is in turn secured to the side facing away from the bearing support lantern 5 side of the bearing support 6.

A split pot 10 is on the side facing away from the hydraulic housing 3 of the

Housing cover 4 attached and extends at least partially by a pump housing 2, in particular from the housing cover 4, from the bearing support lantern 5 and the bearing support 6 limited interior 11. The containment shell 10 has a substantially cylindrical body 12. The base body 12 is open at one side and closed at the side opposite the open side by means of a curved bottom 13. Arranged on the open side is a ring-like mounting flange 14 integrally formed with or joined to the body 12 by welding or other suitable fastening means or devices such as screws, rivets or the like. The attachment Flange 14 is located on the inner side 11 near side of a contact surface 15 of the housing cover 4 and has a plurality of mounting holes 16 through which screws 17 feasible and provided in the housing cover 4 threaded holes 18 are screwed. The containment shell 10 hermetically seals a chamber 19 enclosed by it and the housing cover 4 with respect to the interior 11.

An about a rotational axis A rotatable impeller shaft 20 extends from a limited by means of the hydraulic housing 3 and the housing cover 4 flow chamber 21 through an opening provided in the housing cover 4 opening 22 in the chamber 19. At a lying within the flow chamber 21 shaft end of the impeller shaft 20 is a Impeller 23 attached, at the opposite end of the shaft having two shaft portions 20a, 20b each with increasing diameters, an inner rotor 24 disposed within the chamber 19 is provided. The inner rotor 24 is equipped with a plurality of magnets 25, which are arranged on the side of the inner rotor 24 facing the containment shell 10.

Between the impeller 23 and the inner rotor 24, a bearing assembly 26 operatively connected to the impeller shaft 20 rotatably driven about the rotation axis A is arranged. A bearing ring carrier 27 arranged coaxially with the axis of rotation A, with which the stationary, i. not to be held in place with the impeller shaft 20 rotating parts of the bearing assembly 26 is located with a flange-like portion 28 on a further abutment surface 29 of the housing cover 4, is fastened by means of a screw, not shown on the housing cover 4 and extends into the Chamber 19.

Between the inner rotor 24 and the shaft portion 20a and the bearing assembly 26, in particular the rotating with the impeller shaft 20 parts of the bearing assembly 26, a spring means 30 is arranged in the form of a cup spring assembly and acts on the clamping assembly consisting of impeller 23, the impeller 23rd via a disc 31 to the impeller shaft 20 fastened impeller nut 32, the rotating with the impeller shaft 20 parts of the bearing assembly 26 and inner rotor 24 with a spring force, such that the clamping assembly, in particular via the inner rotor 24, to a certain extent is elastically held in abutment against a contact surface 33, which is formed by the different diameters of the shaft sections 20a and 20b, wherein the diameter of the shaft section 20b is greater than the diameter of the shaft section 20a. The clamping assembly therefore essentially comprises the components rotating with the impeller shaft 20 about the axis of rotation A.

An unillustrated drive motor, preferably an electric motor, drives a drive shaft 34. The drivable about the axis of rotation A drive shaft 34 is arranged substantially coaxially with the impeller shaft 20. The drive shaft 34 extends through the bearing cap 7, the bearing carrier 6 and at least partially into the bearing support lantern 5. The drive shaft 34 is mounted in two housed in the bearing support 6 ball bearings 35, 36. At the free end of the drive shaft 34, a plurality of magnets 37-bearing outer rotor 38 is arranged. The magnets 37 are arranged on the side of the outer rotor 38 facing the containment shell 10. The outer rotor 38 extends at least partially over the split pot 10 and cooperates with the inner rotor 24, such that the rotating outer rotor 38 by means of magnetic forces the inner rotor 24 and thus the impeller shaft 20 and the impeller 23 also set in a rotational movement. FIG. 2 shows a pump arrangement 1 whose external dimensions correspond to the external dimensions shown in FIG. According to a modular principle, hydraulic housing 3, housing cover 4, bearing support lantern 5, bearing support 6 and bearing cover 7 thus have an equal dimensioning. In addition, in both embodiments impeller 23, bearing assembly 26 and bearing ring carrier 27 have a same dimensioning. In the embodiment shown in FIG. 2, both the diameter and the axial extension of the containment shell 10, inner rotor 24 and outer rotor 38 are smaller than in the embodiment shown in FIG. 1. This is particularly advantageous when smaller power requirements, such as a lower head or flow rate, with the highest possible efficiency of the pump assembly 1 exist.

To adapt the split pot 10 with reduced axial extent and reduced diameter, a separate adapter element 39 is provided, which on one side a mounting flange 40, whose configuration substantially corresponds to the configuration of the mounting flange 14 of the can 10 shown in FIG. 1. The mounting flange 40 abuts against the inner space 11 near side of the contact surface 15 of the housing cover 4 and has a plurality of mounting holes 41, through which the screws 17 can be screwed and screwed into the threaded holes 18 provided in the housing cover 4. The contact surface 15 has an area 42 set back in the axial direction, in which a sealing ring 43 is arranged and in which a mounting flange 40 formed on the centering ring 44 engages, whereby the adapter element 39 is aligned exactly and fluid-tight to the housing cover 4 can be fastened.

On the side opposite the mounting flange 40, the adapter element 39 has a plurality of threaded holes 45 into which screws 46 extending through the mounting holes 16 in the mounting flange 14 of the can 10 can be screwed. This makes it possible to exchange different gap pots 10 of different pressure levels or strengths and / or different materials within a magnetic coupling size. In addition, on the mounting flange 40 opposite side extending in the axial direction in the inner space 11 extending ring 47 is provided, which forms a start-up protection and prevents contact of the magnets 37 of the outer rotor 38 on the base body 12 of the split pot 10. The outer contour of the adapter element 39 each have a substantially

cone-shaped course. Starting essentially from the mounting flange 40, the adapter element 39 tapers to the ring 47. The inner contour of the adapter element 39 is at least partially tapered. In the embodiment shown in FIG. 2, the end of the outer rotor 38 pointing in the direction of the housing cover 4 has a radially encircling projection 48 facing the ring 47; in any case, the inner side of the ring 47 must first be in the case of an outer rotor 38 possibly rotating with an imbalance of the adapter element 39 is touched before the magnets 37 of the outer rotor 38 come into contact with the main body 12 of the split pot 10. In an alternative embodiment, the projection 48 may also be formed on the inside of the ring 47. In a further embodiment For example, the projection 48 may be formed both at the end of the outer rotor 38 and on the inner side of the ring 47.

Between the spring device 30 and the inner rotor 24 is a pushed onto the impeller shaft 20 spacer sleeve 49, which extends the above-described clamping assembly to this component. In the illustrated embodiment, the impeller shaft 20, in particular shaft portion 20a, extended by the length of the spacer sleeve 49 with respect to the embodiment shown in FIG. By means of the spacer sleeve 49, the inner rotor 24 moves deeper into the outer rotor 38 in the axial direction. The magnets 25 of the inner rotor 24 and the magnets 37 of the outer rotor 38 are optimally aligned with one another in order to ensure optimum force transmission from the outer rotor 38 to the inner rotor 24 ,

FIG. 3 shows a pump arrangement 1 whose external dimensions correspond to the external dimensions shown in FIGS. 1 and 2. Likewise, impeller 23, bearing assembly 26 and bearing ring carrier 27 have a same dimensioning as in the embodiments shown in FIGS. 1 and 2 on. In the embodiment shown in FIG. 3, both diameter and axial extent of containment shell 10, inner rotor 24 and outer rotor 38 have been further reduced with respect to the embodiment shown in FIG. 2. The impeller shaft 20, in particular shaft portion 20a, has the same axial extent as in the embodiment shown in FIG. The pointing in the direction of the housing cover 4 end of the outer rotor 38 has a ring 47 facing the region 50 with reduced outer diameter, with a possibly with an unbalance rotating outer rotor 38 in any case first to the inside of the ring 47 of the adapter element 39 into abutment before the magnets 37 of the outer rotor 38 come into contact with the main body 12 of the split pot 10.

As can be seen from FIG. 4, the adapter element 39 can also be used on a housing cover 4 designed as a thermal barrier in the case of a pump arrangement 1 carrying a hot medium. In this case, the hydraulic housing 3, essential areas of the housing cover 4, bearing support lantern 5, bearing support 6 and bearing cover 7 have the same dimensions as in the embodiments shown in FIGS. 1 to 3. Examples on. The containment shell 10, the adapter element 39 and the outer rotor 38 have the same dimensions according to the magnetic coupling size according to. Fig. 2.

LIST OF REFERENCE NUMBERS

1 pump arrangement 27 bearing ring carrier

2 pump housing 28 flange area

3 Hydraulic housing 29 Anlagefiäche

4 housing cover 30 spring device

5 bearing bracket lantern 31 disc

6 bearing bracket 32 wheel nut

7 bearing cover! 33 investment areas

8 intake opening 34 drive shaft

9 outlet opening 35 ball bearings

10 containment shell 36 ball bearings

11 Interior 37 Magnet

12 main body 38 outer rotor

13 bottom 39 adapter element

14 Mounting flange 40 Mounting flange

15 contact surface 41 mounting hole

16 mounting hole 42 recessed area

17 Screw 43 Sealing ring

18 threaded hole 44 centering ring

19 chamber 45 threaded hole

20 impeller shaft 46 screw

20a shaft section 47 ring

20b shaft portion 48 projection

21 flow chamber 49 distance hoist

22 opening 50 area with reduced

23 impeller outer diameter

24 inner rotor

25 magnet A rotation axis

26 bearing arrangement

Claims

claims

1 . Pump arrangement, in particular magnetic coupling pump assembly, with

an inner space formed by a pump housing of the pump assembly, a containment shell hermetically seals a chamber enclosed by it against the interior formed by the pump housing, an impeller shaft rotatably driven about an axis of rotation, an impeller arranged at one end of the impeller, one at the other end of the Impeller shaft disposed inner rotor and a cooperating with the inner rotor outer rotor, characterized by a gap pot (10) with the pump housing (2) or with a pump housing (2) associated component, in particular a housing cover (4), connecting adapter element (39) with a Mounting flange (40) on the interior (11) near side of a contact surface (15) of the pump housing (2), in particular the housing cover (4) rests.

2. Pump arrangement according to claim 1, characterized in that the abutment surface (15) has a recessed region in the axial direction (42), in which a on the mounting flange (40) formed centering ring (44) engages.

3. Pump arrangement according to claim 1 or 2, characterized in that on the mounting flange (40) opposite side, the adapter element (39) has a plurality of threaded holes (45).

4. Pump arrangement according to one of claims 1 to 3, characterized in that on the mounting flange (40) opposite side extending in the axial direction in the interior (11) extending ring (47) is provided.

5. Pump arrangement according to one of claims 1 to 4, characterized in that the outer contour of the adapter element (39) has a substantially conical shape.

6. Pump arrangement according to claim 5, characterized in that starting from the Montagefiansch (40), the adapter element (39) tapers to the ring (47).

7. Pump arrangement according to one of claims 1 to 6, characterized in that in the direction of the housing cover (4) facing end of the outer rotor (38) has a NEN radially encircling projection (48).

8. Pump arrangement according to one of claims 1 to 7, characterized in that the projection (48) on the inside of the ring (47) is formed.

9. Pump arrangement according to one of claims 1 to 6, characterized in that in the direction of the housing cover (4) facing the end of the outer rotor (38) has a region (50) with a reduced outer diameter.

10. Pump arrangement according to one of claims 1 to 9, characterized in that between the impeller (23) and inner rotor (24) with the about the axis of rotation (A) rotatably driven impeller shaft (20) operatively connected bearing assembly (26) is arranged.

11. Pump arrangement according to claim 10, characterized in that between the inner rotor (24) and the bearing assembly (26) is arranged a spring means (30).

12. Pump arrangement according to claim 11, characterized in that between the spring device (30) and the inner rotor (24) on the impeller shaft (20) deferred spacer sleeve (49).

13. Modular building block for producing a pump arrangement according to one of claims 1 to 12.