DE102020201998B4 - Containment can with integrated cooling or heating - Google Patents

Abstract

Containment pot of a magnetic coupling, comprising:
- a floor (2),
- a flange (3),
- a jacket (4), which is arranged cylindrically around a central axis (XX) of the containment shell, and
- a line arrangement (5),
- wherein the line arrangement (5) has an inlet (50), a distribution line (51) connected to the inlet (50), a plurality of first sheath lines (52) in a first sheath half, a plurality of second sheath lines (53) in a second Shell half, a first manifold (54), a second manifold (55), an outflow line (56) connected to the first and second manifolds and an outlet (57), and
- wherein the plurality of first sheathed lines (52) connect the distribution line (51) to the first manifold (54) and the plurality of second sheathed lines (53) connect the distribution line (51) to the second manifold (55),
wherein the first and second sheath lines (52, 53) are arranged parallel to one another in planes perpendicular to the central axis (XX) of the containment shell,
wherein the distribution line (51) and the first and second collecting lines (54, 55) and the outflow line (56) are arranged parallel to the central axis (XX) of the containment can,
and wherein the first and second manifolds (54, 55) are connected in the area adjacent to the floor (2).

Description

The invention relates to a containment shell of a magnetic coupling with integrated cooling and/or heating, in particular in order to be able to adjust a temperature level of the containment shell. The present invention further relates to a magnetic coupling with such a containment can.

Containment cans for magnetic couplings are known from the prior art in various designs. Inside the containment shell there is usually a liquid medium which can have a high viscosity, particularly when starting operation of a machine that has such a containment shell. This means that when the machine starts up, it is necessary to heat the containment shell. During operation, heating of the medium and the containment can can occur due to eddy current losses in the magnetic coupling, so that there is a need to cool the containment can. From the DE 10 2011 115 007 B4 a containment can with a jacket in the form of a bellows arrangement is known, whereby eddy current losses can be reduced and thus a temperature of the containment can can be reduced. Furthermore, it is known to form so-called double-walled containment shells, which consist of two deep-drawn containment shells with a cavity in between. The two deep-drawn containment shells are connected to each other by welding. Furthermore, a flange is welded to the two deep-drawn containment shells. Here, a cooling liquid or a heating liquid can be supplied and discharged into the cavity between the two deep-drawn containment shells. However, cooling or heating is very chaotic because it is not possible to determine what the temperature distribution is inside the containment can. Furthermore, it is not possible to carry out a temperature measurement on the containment shell where the temperature arises, namely in the area between the magnets of the magnetic coupling. In this respect, only inadequate control of the temperature is possible during operation of the magnetic coupling.

The GB 2 503 276 A shows a containment shell with sheath lines leading in the axial direction of the containment shell, which lead to a hollow floor or lead away from the hollow floor.

The 36 39 719 A1 shows a containment can as a welded construction, in which semicircular separate areas of the jacket and the base can be flowed through with a medium. Individual sheathed cables are not provided. The US 2005/0235672 A1 shows an arrangement for cooling an electrical machine, in which individual, unconnected distribution lines are led from an inlet to an outlet.

It is therefore the object of the present invention to provide a containment shell and a magnetic coupling which, with a simple structure and simple, cost-effective manufacturability, enables improved cooling and/or heating of the containment shell, in particular with temperature control.

This object is achieved by a containment can with the features of claim 1 and a magnetic coupling with the features of claim 11. The subclaims show preferred developments of the invention.

The containment can of a magnetic coupling according to the invention with the features of claim 1 has the advantage that targeted and significantly improved cooling and / or heating of the containment can is possible. This means that a significantly improved temperature behavior of the containment can can be ensured during operation. Furthermore, it is possible that, for example, when starting up a magnetic coupling, the fluid in the containment can can be heated more quickly by the containment can. This makes it possible to reduce the viscosity of the fluid in the containment shell and to improve the efficiency of the magnetic coupling when starting. Furthermore, wall thicknesses of the containment can can also be reduced by the targeted cooling during operation, so that eddy current losses of a magnetic coupling can also be reduced. There are significant advantages, particularly with magnetic couplings that have to run continuously, for example with pumps that have to run 24 hours a day. This is achieved according to the invention in that the containment shell has a base, a flange and a jacket, which connects the base with the flange. The jacket is cylindrical to a central axis XX of the containment shell. Furthermore, the containment pot includes a line arrangement. A cooling medium and/or a heating medium can flow through the line arrangement. The conduit assembly includes an inlet, a distribution line connected to the inlet, a plurality of first jacketed lines in a first jacket half, a plurality of second jacketed lines in a second jacket half, first and second manifolds, an outflow line and an outlet connected to the outflow line. The outflow line is further connected to the first and second manifolds. The plurality of first sheathed lines connect the distribution line, through which the cooling medium or heating medium is supplied, with the first collecting line. The plurality of second sheathed lines connects the distribution line to the second manifold. The The structure of the containment shell is preferably symmetrical. Thus, the containment can medium used for heating or cooling can be supplied via the inlet into the distribution line and can be supplied from the distribution line into the plurality of first and second jacket lines. The containment can medium thus flows along the two jacket halves of the jacket from the distribution line to the first and second manifold, where the containment can medium is brought together again. The two collecting lines are then connected to the outflow line, from which the containment can medium is discharged from the containment can via the outlet. This means that even when the magnetic coupling is started, a medium within the containment can can be heated quickly. As a result, the viscosity of the medium in the containment shell can be quickly reduced, so that the risk of damage to the magnetic coupling due to a very high viscosity of the medium is avoided. In this way, the starting torque can be reduced and possible tearing off of components of the magnetic coupling can be prevented. Furthermore, a quantity of the cooling medium or heating medium can be optimized by the containment shell according to the invention, since the entire containment shell no longer has to be cooled or heated in an uncontrolled manner, as for example in a construction of the prior art, with two deep-drawn containment shells.

According to the invention, the first and second sheath lines are each arranged parallel to one another in planes perpendicular to the central axis X-X of the containment shell. This enables the casing of the containment shell to be cooled or heated as uniformly as possible.

Furthermore, the distribution line and the first and second collecting lines and the drain line are arranged parallel to the central axis X-X of the containment can. As a result, a particularly long heating section or cooling section is achieved through the first and second jacket lines in the jacket.

The inlet and/or the outlet of the line arrangement is preferably arranged in the flange. The inlet and the outlet on the containment shell are particularly preferably opposite one another.

More preferably, the containment shell further comprises a temperature sensor which is arranged in the casing. This has the particular advantage that a temperature in the area between magnets of a magnetic coupling can now be measured. This makes it possible to specifically control the temperature of the cooling medium or heating medium that is supplied into the line arrangement in order to set a temperature of the fluid in the interior of the containment shell. Preferably, a control unit is provided which, based on the data from the temperature sensor, determines a flow temperature of the cooling medium or heating medium introduced into the containment shell.

The temperature sensor is particularly preferably arranged between the first collecting line and the drain line. This allows the temperature sensor to be positioned directly in the area between the magnets of a magnetic coupling. An opening for the temperature sensor can easily be provided using additive manufacturing.

According to a further preferred embodiment of the invention, the containment can further comprises a flow divider, which is arranged in the line arrangement in front of the distribution line in the flow direction. The flow divider is preferably arranged in the inlet or in the transition area between the inlet and the distribution line. The flow divider enables the supplied flow to be divided into two, so that a uniform distribution of the supplied cooling medium or heating medium from the distribution line into the plurality of first and second jacket lines is possible.

Furthermore, according to the invention it is possible for the bottom of the containment shell to have no line area of the line arrangement. This means that there is no unnecessary cooling or heating of the bottom of the containment shell, as is the case in the prior art.

Further preferably, a cross section of the plurality of first and second sheathed lines is square. The cross section has in particular rounded corners in order to be designed to be as streamlined as possible. The square cross section thus enables a relatively large wall surface, which is directed towards an inside and an outside of the jacket, so that good heat transfer is possible. More preferably, a cross section of each of the sheathed lines remains constant over their entire length.

Preferably, the jacket has a wall thickness on an inside and an outside that is the same as a width of the sheathed cable. Particularly preferred are the wall thicknesses of the sheath and a width of the sheathed cable of 1 mm.

The containment shell is preferably manufactured additively, with all components of the containment shell, ie the base, the flange and the jacket, preferably being manufactured additively. This makes it possible to produce a one-piece containment shell that is free of weld seams and does not have any other connecting seams or the like. Through the additive Fer The containment can can be manufactured in one step in a short working time.

The present invention further relates to a magnetic coupling with an inner rotor and an outer rotor, on which magnets are arranged, as well as a containment can according to the invention.

• 1 eine schematische, perspektivische Ansicht eines erfindungsgemäßen Spalttopfes von außen,
• 2 eine schematische, perspektivische Ansicht des Spalttopfes von 1 mit Sicht in das Innere des Spalttopfes,
• 3 eine schematische Schnittansicht einer Magnetkupplung einer Pumpe mit einem Spalttopf gemäß 1,
• 4 eine schematische, perspektivische Darstellung einer Leitungsanordnung des Spalttopfes von 1 als Leitungsgerippe aus einer ersten perspektivischen Ansicht,
• 5 eine schematische, perspektivische Darstellung einer Leitungsanordnung des Spalttopfes von 1 als Leitungsgerippe aus einer zweiten perspektivischen Ansicht,
• 6 eine schematische Schnittansicht des Spalttopfes von 1, wobei der Schnitt bogenförmig durch eine Mitte des Mantels des Spalttopfs verläuft, so dass Teile der Leitungsanordnung sichtbar sind,
• 7 eine schematische Teilschnittansicht durch den Mantel des Spalttopfes und eine der Mantelleitungen, und
• 8 eine schematische Schnittansicht durch einen Einlass des Spalttopfs von 1.

A preferred embodiment of the invention is described in detail below with reference to the accompanying drawing. In the drawing is:

• 1 a schematic, perspective view of a containment can according to the invention from the outside,
• 2 a schematic, perspective view of the containment can 1 with a view of the interior of the containment can,
• 3 a schematic sectional view of a magnetic coupling of a pump with a containment can according to 1 ,
• 4 a schematic, perspective view of a line arrangement of the containment can 1 as a cable framework from a first perspective view,
• 5 a schematic, perspective view of a line arrangement of the containment can 1 as a cable framework from a second perspective view,
• 6 a schematic sectional view of the containment shell from 1 , whereby the cut runs in an arc through a center of the jacket of the containment shell, so that parts of the line arrangement are visible,
• 7 a schematic partial sectional view through the casing of the containment can and one of the casing lines, and
• 8th a schematic sectional view through an inlet of the containment shell 1 .

Below is with reference to the 1 to 8 a containment pot 1 and a magnetic coupling 10 according to a preferred embodiment of the invention are described in detail.

The 1 and 2 show a containment can 1 according to the invention, which has a base 2, a flange 3 and a jacket 4. The jacket 4 connects the base 2 with the flange 3 and is cylindrical. The flange 3 is completely circumferential and has a plurality of fastening openings 30, via which the containment can 1 can be connected to a housing 15, for example a pump.

The containment can 1 according to the invention is formed in one piece and without weld seams, for example by means of additive manufacturing.

3 shows the magnetic coupling 10 with the containment can 1 schematically in a sectional view. The containment pot 1 is connected to the housing 15 of the pump at the flange 3 by means of bolts 16. The magnetic clutch 10 is arranged between a drive shaft 11 and an output shaft 12. Here, the drive shaft 11 has a bell 17 on which first magnets 13 are arranged. Second magnets 14 are connected to the output shaft 12. How out 3 As can be seen, the second magnets 14 are arranged in the interior 20 of the containment shell 1. The containment pot 1 is thus arranged in the area of the jacket 4 between the first and second magnets 13, 14.

The drive shaft 11 and the output shaft 12 lie on a common axis, which is also a central axis X-X of the containment shell 1.

The medium to be pumped is located in the interior 20 of the containment shell 1.

The containment pot 1 further comprises a line arrangement 5, which is shown in detail in the 4 to 8 is shown. They show 4 and 5 Line frames, which are designed inside as channels for the passage of medium in the containment shell. The solid material of the containment shell is in the 4 and 5 not shown. The 4 and 5 show a negative view of the line arrangement 5 for a better understanding of the line arrangement.

Like from the 4 and 5 As can be understood, the line arrangement 5 includes an inlet 50 through which a medium is fed into the line arrangement 5 of the containment shell 1 (arrow A). The medium then flows through the inlet 50 into a distribution line 51, which flows out best 4 is visible. How out 4 As can be seen, a plurality of first sheathed lines 52 and a plurality of second sheathed lines 53 extend from the distribution line. The first and second sheathed lines 52, 53 branch off from the left and right sides of the distribution line 51. In detail, the first sheathed lines 52 branch off on the right side of the distribution line in the flow direction of the distribution line 51 and the second sheathed lines 53 branch off on the left side in the flow direction of the distribution line 51. The first and second sheath lines run in the circumferential direction to almost over half of the sheath 4. As can be seen from the 4 and 5 As can be seen, one of the first sheathed lines and one of the second sheathed lines lie in a common plane, which is perpendicular to the central axis XX.

In the 4 and 5 the direction of flow through the first sheathed lines 52 is marked by the arrow B and the direction of flow through the second sheathed lines 53 is marked by the arrow C.

The plurality of first sheathed lines 52 then opens into a first manifold 54 which runs in the direction of the central axis to each other. The first distribution line 51 is also parallel to the two collecting lines 54, 55.

Furthermore, an outflow line 56 is provided, which, as shown in FIGS 4 to 6 can be seen, is arranged in the circumferential direction between the first manifold 54 and the second manifold 55. The outflow line 56 is also arranged parallel to the central axis XX and is connected to the first and second manifolds 54 and 55 in the area adjacent to the bottom 2. Thus, the medium supplied to the first manifold 54 flows as shown in 6 indicated by the arrows D, into the outflow line 56 and the medium supplied via the second jacket lines 53 flows from the second collecting line 55 into the outflow line 56, which is indicated by the arrows E in 6 is indicated. The medium then flows from the outflow line 56 into an outlet 57 (arrow F), which is arranged in the flange 3.

Like from the 4 and 5 As can be seen, the inlet 50 and the outlet 57 are opposite each other on the containment shell.

7 shows a section through a first sheathed line 52. A cross section of the first sheathed lines 52 is rectangular with rounded corners. A width D3 of the first sheath lines 52, measured perpendicular to the central axis XX, is the same size as a first wall thickness D1 and a second wall thickness D2 of the sheath 4 in the area of the sheath lines 52.

It should be noted that in this exemplary embodiment, a cross section of the first sheath lines 52 and the second sheath lines 53 is the same. However, it is also conceivable that, depending on the application, different cross sections can be selected for different first sheath lines 52 and different second sheath lines 53. This allows an individual temperature pattern to be generated specifically on the containment shell 1.

8th shows a section through the inlet 50. As shown 8th As can be seen, a flow divider 8 is provided in the inlet 50. The flow divider 8 supports the inflow of the medium supplied through the inlet 50 in the direction of the first jacket lines 52 and the second jacket lines 53.

The containment pot 1 also includes a temperature sensor 6, which is detailed 6 is visible. The temperature sensor 6 is arranged in the jacket 4. How out 6 As can be seen, the temperature sensor 6 lies between the first collecting line 54 and the outflow line 56. A sensor cable 60 is guided in a passage 7 for the temperature sensor, which exits from the passage 7 at the flange 3 (cf. 2 ).

It is therefore possible according to the invention that an exact temperature in the area of the jacket 4 of the containment shell 1 can be determined. The temperature in the area between the first and second magnets 13, 14 of the magnetic coupling can thus be detected. A flow temperature of the cooling medium and/or heating medium, which is supplied through the inlet 50 into the line arrangement 5, can then be set accordingly. The temperature measurement in the area of the first and second magnets 13, 14 is particularly important since the eddy current losses in the area between the first and second magnets 13, 14 are the main heat source of the magnetic coupling.

Thus, for example, when starting up the magnetic coupling 10, if the medium located in the interior 20 of the containment shell 1 still has a high viscosity and is viscous, a heating medium can be supplied through the line arrangement 5 in order to reduce the viscosity of the medium in the interior 20. This can also be done at a time before the magnetic clutch is desired to start. This can prevent damage to the components of the magnetic coupling, in particular a tearing off of magnets or the like, from occurring when starting.

During continuous operation of the magnetic coupling, a cooling medium can then be specifically supplied through the line arrangement 5. Temperature monitoring is carried out by means of the temperature sensor 6, so that the temperature of the containment shell in the area of the outlet of the cooling medium, namely in the jacket 4 in the area of the outflow line 56, can be determined. Since the cooling medium has already absorbed heat at this flow point of the cooling medium, the flow temperature of the cooling medium can be adjusted by determining the temperature in this area. The still cool cooling medium enters at the inlet 50 and heats up as it flows through the first and second jacket lines 52, 53 to the collecting lines 54, 55 and the outflow line 56, from which to the temperature of the containment pot 1 in the area of the jacket 4 can be closed.

The containment can 1 can, for example, be produced quickly and cost-effectively as a one-piece component using additive manufacturing processes. Another advantage is that additive manufacturing can significantly reduce the wall thickness of the containment shell 1 in comparison with the prior art and in particular in comparison with two deep-drawn containment shells. The containment can 1 can also have a higher mechanical strength, especially when using a material containing titanium, for example Ti6AI4V (Titanium Grade 5). The containment can 1 can also withstand higher pressures, so that the range of applications for the containment can 1 can be expanded.

By reducing the wall thickness of the jacket 4, the eddy current losses during operation of the magnetic coupling are also reduced. This also results in lower power loss.

Due to the possibility of integrating the temperature sensor 6 into the containment can 1, the containment can 1 according to the invention and the magnetic coupling according to the invention are therefore also suitable for 24-hour continuous use, for example in boreholes or the like. The problem with such applications has always been that temperature monitoring of the magnetic coupling and the containment shell was not possible for continuous operation, so that the design and thus also the wall thicknesses of the containment shells used there lead to very large wall thicknesses, which accordingly results in eddy current losses. which also negatively affects the pump performance. The containment can according to the invention can therefore enable a design with reduced wall thicknesses.

Reference symbol list

1

containment pot

2

Floor

3

flange

4

Coat

5

Line arrangement

6

Temperature sensor

7

Passage/channel for temperature sensor

8th

Flow divider

10

Magnetic coupling

11

drive shaft

12

output shaft

13

first magnets

14

second magnets

15

Pump housing

16

bolt

17

Bell jar

20

Interior of the containment shell

30

mounting holes

50

inlet

51

distribution line

52

first sheathed cables

53

second sheathed cables

54

first collecting line

55

second collecting line

56

Outflow line

57

outlet

60

Sensor cable

A

Cooling medium/heating medium inflow

b

Direction of flow in the first sheath lines 52

C

Direction of flow in the second jacket lines 53

D

Direction of flow in the first manifold 54

D1

first wall thickness

D2

second wall thickness

D3

Width of the sheathed cables

E

Direction of flow in the second manifold 55

F

Direction of flow in the discharge line

G

Outflow from outlet 57

X-X

Central axis of the containment can

Claims (11)

A containment shell of a magnetic coupling, comprising: - a base (2), - a flange (3), - a jacket (4), which is arranged cylindrically around a central axis (XX) of the containment shell, and - a line arrangement (5), - where the line arrangement (5) has an inlet (50), a distribution line (51) connected to the inlet (50), a plurality of first sheathed lines (52) in a first jacket half, a plurality of second sheathed lines (53) in one second jacket half, a first manifold (54), a second manifold (55), an outflow line (56) connected to the first and second manifolds and an outlet (57), and - wherein the plurality of first jacket lines (52) form the distribution line (51) connect to the first manifold (54) and the plurality of second sheathed lines (53) connect the distribution line (51) to the second manifold (55), the first and second sheathed lines (52, 53) in planes perpendicular to the central axis (XX) of the containment shell are arranged parallel to one another, with the distribution line (51) and the first and second collecting lines (54, 55) and the outflow line (56) being arranged parallel to the central axis (XX) of the containment shell, and wherein the first and second Manifold (54, 55) are connected in the area adjacent to the floor (2). containment pot Claim 1 , wherein the inlet (50) and / or the outlet (57) are arranged in the flange. Containment can according to one of the preceding claims, further comprising a temperature sensor (6) which is arranged in the jacket (4). containment pot Claim 3 , wherein the temperature sensor (6) is arranged in the circumferential direction of the jacket (4) between the first collecting line (54) and the outflow line (56). Containment can according to one of the preceding claims, further comprising a flow divider (8) which is arranged in the inlet (50) of the line arrangement (5). Containment can according to one of the preceding claims, wherein the bottom (2) of the containment can has no line area of the line arrangement (5). Containment can according to one of the preceding claims, wherein a cross section of the plurality of first and second sheath lines is square. A containment shell according to one of the preceding claims, wherein the inlet (50) and the outlet (57) lie opposite one another on the containment shell. Containment can according to one of the preceding claims, wherein the jacket (4) has a first wall thickness (D1) on an inside and a second wall thickness (D2) on an outside, the first and second wall thicknesses (D1, D2) being the same as a width (D3) of the first and second sheath lines (52, 53). Containment can according to one of the preceding claims, wherein the containment can is formed in one piece with the base (2), jacket (4) and flange (3). Magnetic coupling, comprising a containment can according to one of the preceding claims.

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