DE102012104310A1 - Pump module for conveying fluid via bore hole, has two link assemblies arranged at two respective connection sides for mechanical and hydraulic connection of module, and pumping element producing pressure difference between inlet and outlet - Google Patents

Abstract

The module (14) has a first link assembly (40) and a second link assembly respectively arranged at a first connection side and a second connection side (36) for mechanical and hydraulic connection of the module. A pumping element produces a pressure difference between the fluid inlet and outlet. The fluid inlet and outlet are aligned in an axial direction, and comprises respective fluid connections, which are formed complementarily to each other. An electrical inlet and forwarding device (52) comprises two electrical interconnect components arranged at the respective connection sides. An independent claim is also included for a pump device.

Description

The invention relates to a pump module for conveying a fluid.

Furthermore, the invention relates to a pump device with at least two such pump modules.

In known pumping devices, several pumping stages driven by the same drive have been used to meet the application requirements. In order to meet the wide variety of applications and their requirements, a large number of different pumping levels and drives is required, which makes it difficult to handle these products within the distribution chain.

The invention has for its object to achieve a broader range of applications of a pumping device in a simple manner.

This object is achieved according to the invention by a pump module, comprising a housing, a fluid inlet, a fluid outlet, a first connection device for mechanical and hydraulic connection, which is arranged on a first connection side, and a second connection device for mechanical and hydraulic connection, which is connected to a second Connection side is arranged.

The thus achievable connectivity with other pump modules allows an increase in pump power. In particular, the achievable pressure can be multiplied by stacking a plurality of pump modules.

Thus, with a small amount of different pump modules, which differ for example in the flow rate, a wide range of applications can be achieved. As a result, the storage costs within the retail chain can be significantly reduced.

In particular, can be produced by the stackability of the pump modules, an elongated pumping device, for example, is ideally suited for use in a borehole.

By choosing the type of pumping modules, for example, a certain delivery rate can be achieved, and the number of pumping modules can achieve the pressure needed to deliver the fluid from, for example, a borehole.

Another favorable solution provides that the pump module comprises at least one pumping element for generating a pressure difference between the fluid inlet and the fluid outlet. As a result, the pressure required for the respective application can be generated, for example to convey a fluid from a borehole.

Furthermore, a favorable solution provides that the pumping elements are flow pumping elements. That is, the pumping elements take advantage of the forces generated by the flow of fluid produced by rotation of the pumping elements to produce a pressure differential.

The pumping element may comprise, for example, an impeller, an impeller or a propeller.

A particularly favorable solution provides that the pump module comprises at least one drive. The fact that the pump module has its own drive, the drive can be ideally matched to the pump module, whereby a more efficient design can be achieved. Furthermore, the pump module can also be used individually.

It is favorable if the at least one drive for driving the at least one pumping element is coupled to the at least one pumping element.

It when the drive comprises an external rotor motor whose outer rotor is formed by the pumping element is particularly advantageous. Thus, a space-saving direct coupling between the drive and pump element can be achieved.

In a particularly favorable manner, the fluid inlet and the fluid outlet are aligned in an axial direction. As a result, the pump modules are stackable on top of each other, so that a straight stack is formed, which can be used in a cramped location such as a borehole.

A particularly favorable solution provides that the fluid inlet has a first fluid connection, which is arranged on the first connection side, and that the fluid outlet has a second fluid connection, which is arranged on the second connection side.

It is advantageous if the connection sides are substantially parallel, so that a straight stack is possible.

Furthermore, it is advantageous that the first fluid port and the second fluid port are formed complementary to each other. Characterized in that the first fluid port and the second fluid port complementary to each other are formed, the second fluid port is connectable to a first fluid port of another identical pump module.

Since the fluid connections of two pump modules can be connected to each other, a stacked arrangement of the pump modules is made possible.

A further advantageous solution provides that the pump module comprises a first and a second connecting device for mechanical, hydraulic and electrical connection. As a result, the pump modules can be connected to each other both mechanically, hydraulically and electrically.

It is particularly advantageous that the pump module comprises an electrical supply and forwarding device which extends between the first and the second connection side. With the aid of the electrical supply and forwarding device, the pump modules are supplied with (electrical) energy, which is needed to convey the fluid.

Furthermore, the electrical supply and forwarding device can be used for the transmission of signals such as control commands to the drive or status information about the temperature, pressure or rotational speed of the drive.

By sharing the supply and forwarding device for several pump modules, a saving of space can be achieved, which is particularly advantageous in tight working environments such as holes.

A particularly favorable connectivity of the pump modules is achieved if the electrical supply and forwarding device has a first electrical connection element which is arranged on the first connection side, and a second electrical connection element which is arranged on the second electrical connection side. This allows the electrical connection between stacked pump modules.

It is particularly favorable for the connection of two pump modules that the first electrical connection element and the second electrical connection element are formed complementary to each other. As a result, the second electrical connection of a pump module can be connected to the first electrical connection of another identical pump module.

It is particularly favorable if the pump module comprises at least a first mechanical connecting element, which is arranged on the first connection side, and at least one second mechanical connecting element, which is arranged on the second connection side. The mechanical fasteners allow the mechanical connection between the pump modules and can absorb the forces occurring, so that a possible fluid connection or a possible electrical connection are relieved.

Furthermore, it is advantageous if the at least one first mechanical connecting element is designed to be complementary to the at least one second mechanical connecting element. As a result, the at least one second mechanical connecting element can be connected to at least one first mechanical connecting element of a further pump module of the same design.

Furthermore, a solution according to the invention is a pump device with at least two pump modules according to the invention, wherein the at least two pump modules are connected in fluid-efficient series.

The pumping device according to the invention has the advantages achieved in connection with the pump modules.

Another particularly favorable solution provides that the pump modules are mechanically and hydraulically connected. This creates a single assembly that has the combined pumping powers of the pump modules and can be additionally handled as a unit.

It is favorable that conveyed fluid flows through each pump module of the pumping device.

Advantageously, the pump modules are electrically connected. For example, electrical energy or control signals can be passed from the pump module to the pump module.

It is particularly advantageous if the fluid outlet of a first pump module is fluidically connected to the fluid inlet of a second pump module.

A further advantageous solution provides that the pressure difference between the fluid inlet of a first pump module and the fluid outlet of a last pump module corresponds approximately to the sum of the pressure differences between the respective fluid inlet and the respective fluid outlet of the individual stacked pump modules. Thus, the pump pressure can be adjusted by the number of pump modules used to the requirements of the application purpose.

Furthermore, it is favorable if each pump module comprises a drive for driving the pumping element of the pump module.

Advantageously, the pump modules can be combined by stacking to meet the hydraulic requirements.

Conveniently, a connector is provided to hydraulically and electrically connect the modules.

Further features and advantages of the invention are the subject of the following description and drawings of an embodiment.

In the drawings show:

1 a perspective view of an embodiment of a pump device according to the invention;

2 a vertical section through the pumping device 1 through the section line 2-2;

3 an exploded perspective view of the embodiment of the pumping device;

4 a side view of the embodiment of the pumping device;

5 a side view of the pumping device 4 wherein the housings of the pump modules are hidden;

6 a side view of a second embodiment of the pumping device with four pump modules; and

7 a side view of the pumping device 6 , wherein the housing of the pump modules are hidden.

Equal or functionally equivalent elements are provided with the same reference numerals in all figures.

One in the 1 as a whole illustrated pumping device 10 for conveying a fluid 11 includes a suction cover 12 , several, for example two, pump modules 14 and a pipe connection 16 ,

The suction cover 12 has a cylindrical wall 18 on, on a suction side 20 the suction cover 12 with a perforated wall 22 is covered. The punched wall 22 has several openings 24 on, through which fluid can pass. The punched wall 22 thus produces a sieving effect.

Opposite the suction side 20 is a connection side 26 the suction cover 12 , In the area of the connection side 26 are several, for example three, mechanical fasteners 28 on the outside of the cylindrical wall 18 the suction cover 12 arranged.

With the help of mechanical fasteners 28 the suction cover is on a first connection side 30 a pump module 14 held.

The pump module 14 comprises a substantially cylindrical housing 34 with a cylindrical outer wall 31 , which is arranged on a front side first connection side 30 and an opposite, in an axial direction 33 spaced second connection side 36 having.

The first connection side 30 has a fluid inlet 38 on, for example, coaxial with the substantially cylindrical housing 34 is arranged.

For connection to other pump modules 14 or with the suction cover 12 indicates the first connection side 30 a first connection device 40 on, which has a first fluid connection 42 , several, for example three, first mechanical fasteners 44 and a first electrical connection element 46 includes.

The first fluid connection 42 is at the fluid inlet 38 arranged so that the fluid inlet 38 fluid tight to a matching second fluid port 58 is connectable. An appropriate matching second fluid connection 58 For example, on a pipe, a hose, on another pump module 14 be arranged.

The first mechanical fasteners 44 are on the first connection side 36 outside the fluid inlet 38 arranged. The first mechanical fasteners 44 are designed for a mechanical connection, for example for a releasable mechanical connection. These can be the first mechanical fasteners 44 be formed platelet-shaped and be provided with a bore.

Thus, a screw connection can be made. Other connection options are also possible, such as terminals, gluing, welding, riveting, snapping or the like.

The first mechanical fasteners 44 are to connect with both others pump modules 14 as well as with the suction cover 12 suitable.

The first electrical connection element 46 is outside the circular base area of the cylindrical housing 34 arranged. The first electrical connection element 46 has a crescent-shaped cross-section 48 on, its inner boundary line 50 has a radius of curvature corresponding to the radius of the cylindrical outer wall 31 of the housing 34 corresponds, so that the first electrical connection element 46 to the cylindrical outer wall 31 of the housing 34 can be applied.

The first electrical connection element 46 has, for example, a female connector for connecting a plurality of electrical conductors of an electrical supply and forwarding device 52 on.

The electrical supply and forwarding device 52 extends from the first connection side 30 of the pump module 14 to the second connection side 36 of the pump module 14 , At the second connection side 36 goes the electrical supply and forwarding device 52 in a second electrical connection element 54 above.

The second electrical connection element 54 is for example as a male connector for connecting multiple wires of the electrical supply and forwarding device 52 educated. Next is the second electrical connection element 54 complementary to the first electrical connection element 52 formed so that the first electrical connection element 52 with a second electrical connection element 54 another pump module 14 is connectable.

At the second connection side 36 is a second connection device 56 arranged, which is the second electrical connection element 54 , a second fluid connection and a plurality, for example three, second mechanical connection elements 60 having.

The second fluid connection 58 is at a fluid outlet 62 coaxial with the fluid inlet 38 arranged and is for connection to a first fluid connection 42 another identical pump module 14 educated.

So can the fluid outlet 62 fluid-tight to the fluid inlet 38 another pump module 14 be connected.

For a straight, space-saving arrangement of the pump modules 14 to achieve is the fluid outlet 62 coaxial with the fluid inlet 38 arranged.

The second mechanical fasteners 60 are complementary to the first mechanical fasteners 44 educated. Thus, the second mechanical connection elements to first mechanical fasteners 44 another pump module 14 be mechanically connected.

To generate a pressure difference between the fluid inlet 38 and fluid outlet 62 includes the pump module 14 a pumping element 70 that from a drive 72 is driven.

The pumping element 70 is a mechanical element that can produce by rotation a difference in the pressure of a fluid at two points, for example, the pumping element has 70 an impeller on.

The drive 72 is for example an external rotor electric motor 74 , on the outer rotor of the pumping element 70 is arranged. This is the pumping element 70 directly through the engine 74 driven, without transmission losses can occur for example via a transmission.

The rotation axis 78 of the motor 74 and thus also of the pumping element 70 is substantially coaxial with the cylinder axis of the housing 34 , The diameter 80 of the outside runner 76 is smaller than an inner diameter 82 of the housing 34 and the depth of the outer rotor 76 is smaller than the height of the housing 34 , leaving a free space 84 inside the case 34 around the external rotor 76 is formed around. The open space 84 is called fluid passage 86 between the fluid inlet 38 and the fluid outlet 62 used.

The pumping element 70 has wing elements 88 up, extending from the outer rotor 76 out into the open space 84 extend into it, without the housing 34 to touch.

Through the wing elements 88 becomes the fluid 11 that is in the open space 84 located, together with the pumping element 70 set in rotation.

The fluid passage 86 includes three areas, a radially extending pressure generating area 90 , an axially extending transition region 92 and a radially extending return area 94 ,

The pressure generation area 90 extends from the fluid inlet starting between the first port side 30 and the external rotor 80 radially outward. In this area becomes the fluid 11 through the wing elements 88 of the pumping element 70 set in rotation.

The centrifugal forces generated by the rotation create a radial pressure gradient in the fluid 11 , where the pressure is close to the axis of rotation 78 less than at the cylindrical outer wall 31 of the housing 34 ,

The transition area 92 extends from the first connection side 30 in the axial direction 33 to the second connection side 36 between the cylindrical outer wall 31 of the housing 34 and the external rotor 80 ,

In the transition area 92 are curved wing elements 96 on the outer rotor 76 arranged to ensure that by the rotation of the pumping element 70 the fluid 11 in the axial direction 33 to the second connection side 36 is pressed.

The return area 94 extends between the second connection side 36 of the housing 34 and the external rotor 76 radially from the cylindrical outer wall 31 of the housing 34 to the fluid outlet 62 ,

In the return area 94 are static wing elements 89 on the housing 34 arranged in the return area 94 protrude, allowing the rotation of the fluid 11 is slowed down. So that the rotation of the fluid in the return area 94 at least less than in the pressure generating area 90 ,

Due to the fact that the rotation of the fluid in the return area 94 is reduced, the pressure gradient in the fluid is along the recirculation area 94 less than the pressure gradient in the pressure generating area 90 , This creates a pressure difference between the fluid inlet and the fluid outlet.

The first embodiment of the pumping device comprises two pump modules 14 , which are mechanically, hydraulically and electrically connected to each other, wherein the second connecting means 56 of the first pump module 14 with the first connection device 40 of the second pump module 14 connected is.

At the first connection device 40 of the first pump module 14 is the suction cover 12 arranged and at the first mechanical fasteners 44 held, and a fluid-tight electrical termination element 98 is on the first electrical connection element 46 of the first pump module 14 connected.

At the second connection device 56 of the second pump module 14 is the pipe connection 16 connected and to the second mechanical fasteners 60 held, and on the second electrical connection element 56 of the second pump module 14 is an electrical supply device 102 connected.

By this arrangement becomes fluid 11 passing through the suction cover 12 into the pumping device 10 enters, through the first pump module 14 along the fluid passage 86 led, which increases the pressure within the fluid 11 elevated. The fluid 11 is then through the fluid outlet 62 of the first pump module 14 into the fluid inlet 38 of the second pump module 14 guided, from there the fluid happens 11 the fluid passage 86 of the second pump module 14 , which reduces the pressure inside the fluid 11 further increased.

By the number of hydraulic pump modules connected in series 14 within the pumping device 10 the achieved pressure increase can be adapted to different requirements. For example, a pumping device 10 with four pump modules 14 possible, as in the 6 and 7 is shown.

The invention is not limited to an even number of pump modules 14 limited, even an odd number of pump modules 14 is possible.

LIST OF REFERENCE NUMBERS

10

 pumping device

11

 fluid

12

 suction cover

14

 pump module

16

 pipe connection

18

 cylindrical wall

20

 suction

22

 punched wall

24

 openings

26

 Connection side of the suction cover

28

 mechanical connection element

30

 first connection side

31

 cylindrical outer wall

33

 axial direction

34

 casing

36

 second connection side

38

 fluid inlet

40

 first connection device

42

 first fluid connection

44

 first mechanical connecting element

46

 first electrical connection element

48

 crescent-shaped cross-section

50

 inner boundary line

52

 electrical supply and forwarding device

54

 second electrical connection element

56

 second connection device

58

 second fluid connection

60

 second mechanical connecting element

62

 fluid outlet

70

 pumping element

72

 drive

74

 engine

76

 external rotor

78

 axis of rotation

80

 Diameter of the external rotor

82

 Inner diameter of the housing

84

 free space

86

 fluid passage

88

 wing element

89

 static wing element

90

 Pressure generating area

92

 Transition area

94

 Recirculation region

96

 curved wing element

98

 fluid-tight electrical termination element

102

 electrical supply device

Claims (17)

Pump module for conveying a fluid ( 11 ), comprising a housing ( 34 ), a fluid outlet ( 62 ), a fluid inlet ( 38 ), a first connection device ( 40 ) to the mechanical and hydraulic connection, which at a first connection side ( 30 ), and a second connecting device ( 56 ) to the mechanical and hydraulic connection, which at a second connection side ( 36 ) is arranged. Pump module according to claim 1, characterized in that the pump module ( 14 ) at least one pumping element ( 70 ) for generating a pressure difference between fluid inlet ( 38 ) and fluid outlet ( 62 ). Pump module according to one of claims 1 to 2, characterized in that the pump module ( 14 ) at least one drive ( 72 ). Pump module according to one of claims 1 to 3, characterized in that the fluid inlet ( 38 ) and the fluid outlet ( 62 ) in an axial direction ( 33 ) are aligned. Pump module according to one of claims 1 to 4, characterized in that the fluid inlet ( 38 ) a first fluid port ( 42 ), which at the first connection side ( 30 ), and that the fluid outlet ( 62 ) a second fluid port ( 58 ), which at the second connection side ( 36 ) is arranged. Pump module according to claim 5, characterized in that the first fluid connection ( 42 ) and the second fluid port ( 58 ) are formed complementary to each other. Pump module according to one of claims 1 to 6, characterized in that the pump module ( 14 ) a first and a second connection device ( 40 . 56 ) for mechanical, hydraulic and electrical connection. Pump module according to one of claims 1 to 7, characterized in that the pump module ( 14 ) an electrical supply and forwarding device ( 52 ) located between the first and the second terminal side ( 30 . 36 ). Pump module, according to claim 8, characterized in that the electrical supply and forwarding device ( 52 ) a first electrical connection element ( 46 ), which is on the first connection side ( 30 ), and a second electrical connection element ( 54 ) on the second connection side ( 36 ) is arranged. Pump module according to claim 9, characterized in that the first electrical connection element ( 46 ) and the second electrical connection element ( 54 ) are formed complementary to each other. Pump module according to one of claims 1 to 10, characterized in that the pump module ( 14 ) at least one first mechanical connecting element ( 44 ), which is on the first connection side ( 30 ), and at least one second mechanical connecting element ( 60 ) on the second connection side ( 36 ) is arranged. Pump module, according to claim 11, characterized in that the at least one first mechanical connecting element ( 44 ) complementary to the at least one second mechanical connecting element ( 60 ) is trained. Pumping device with at least two pump modules ( 14 ) according to one of claims 1 to 12, characterized in that the at least two pump modules ( 14 ) are connected fluidly in series. Pumping device according to claim 13, characterized in that the pump modules ( 14 ) are mechanically and hydraulically connected. Pumping device according to one of claims 12 or 14, characterized in that the pump modules ( 14 ) are electrically connected. Pumping device according to one of claims 12 to 15, characterized in that the fluid outlet ( 62 ) of a first pump module ( 14 ) with the fluid inlet ( 38 ) is fluidly connected to a second pump module. Pumping device according to one of claims 12 to 16, characterized in that the pressure difference between the fluid inlet ( 38 ) of a first pump module ( 14 ) and the fluid outlet of a last pump module ( 14 ) about the sum of the pressure differences between the respective fluid inlet ( 38 ) and the respective fluid outlet ( 62 ) of the individual stacked pump modules ( 14 ) corresponds.

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