Borehole pump, submersible motor-driven pump or submersible motor-driven agitator

Abstract

The invention relates to a borehole pump, a submersible motor-driven pump (1) or a submersible motor-driven agitator (26), comprising: a submerged motor housing (3); an electric motor (6) arranged within the motor housing (3) for driving an impeller of the borehole pump, the submersible motor-driven pump (1) or the submersible motor-driven agitator (26); a motor controller (14) arranged on the motor housing (3) for controlling the electric motor (6); and a sensor device (21) arranged inside the motor housing (3) for measuring at least one operating parameter of the borehole pump, the submersible motor-driven pump (1) or the submersible motor-driven agitator (26), the sensor device (21) being spatially separated from the motor controller (14) and being connected to the motor controller (14) by means of a field bus.

Description

[0001] Borehole pump, submersible motor pump or submersible motor agitator

[0002] Technical field

[0003] The invention relates to a borehole pump, a submersible motor pump or a submersible motor mixer with a submerged motor housing, an electric motor arranged inside the motor housing for driving an impeller of the borehole pump, the submersible motor pump or the submersible motor mixer, and a motor control arranged inside the motor housing for controlling the electric motor.

[0004] Background of the invention

[0005] Borehole pumps, submersible motor pumps and submersible motor mixers are known from the prior art.

[0006] Borehole pumps are used to pump liquids, usually water, from boreholes, particularly from great depths. The motor housing of a borehole pump is typically long and narrow for easy insertion into the borehole. Within the borehole, the motor housing is usually completely submerged in the fluid. The fluid pumped by the borehole pump is then typically conveyed to the surface via vertical pipelines. Borehole pumps are used especially in wells for water supply and in geothermal energy applications.

[0007] Submersible motor pumps, also called submersible pumps, for clear and / or wastewater are versatile and can handle large flow rates. They are used particularly for drainage, well and drinking water supply, garden and pond irrigation, and in industrial applications. A key characteristic of a submersible motor pump is that its motor housing is at least partially, and often completely, immersed in the pumped medium. Submersible agitators are used to stir and mix liquids such as clear, dirty, and / or wastewater and are often also completely immersed in the fluid. Instead of an impeller, as used in borehole pumps and submersible motor pumps, the submersible agitator uses a similarly designed impeller or propeller, which can also be referred to as an impeller.Submersible motor mixers are used in sewage treatment plants, industrial processes, agriculture, or water treatment.

[0008] These types of borehole pumps, submersible motor pumps, and submersible motor agitators use a motor controller located within the respective motor housing to control an electric motor also located within the motor housing. Sensors for detecting at least one operating parameter of the borehole pump, submersible motor pump, or submersible motor agitator are typically directly connected to the motor controller, which limits the possible spatial arrangement of the motor controller within the motor housing.

[0009] Description of the invention

[0010] Starting from this situation, it is an object of the present invention to provide a borehole pump, submersible motor pump or submersible motor mixer whose motor control can be positioned more flexibly within a motor housing of the borehole pump, submersible motor pump or submersible motor mixer.

[0011] The object of the invention is achieved by the features of the independent claim. Advantageous embodiments are specified in the dependent claims.

[0012] Accordingly, the problem is solved by a borehole pump, submersible motor pump or submersible motor agitator with a submerged motor housing, an electric motor arranged inside the motor housing for driving an impeller of the borehole pump, the submersible motor pump or the submersible motor agitator, a motor control unit arranged in particular in or inside the motor housing for controlling the electric motor, and a sensor device arranged inside the motor housing for detecting at least one operating parameter of the borehole pump, the submersible motor pump or the submersible motor agitator, wherein the sensor device is spatially separated from the motor control unit and connected to the motor control unit by means of a fieldbus.

[0013] A key aspect of the invention is that the sensor device is arranged spatially remotely from the motor control unit and communicates with it via the fieldbus. For example, the sensor device can be located on or adjacent to the electric motor, while the motor control unit is arranged separately. In this context, the term "spatially remote" means, for example, that the sensor device is located at least 10, 20, or 30 cm away from the motor control unit. While the proposed solution does not preclude the motor control unit from itself including a sensor for detecting a potentially additional operating parameter, as is known from the prior art, it is provided in every case that the at least one operating parameter detected by the sensor device is transmitted to the motor control unit via the fieldbus.

[0014] The sensor device preferably includes a microcontroller or similar component to transmit sensor signals received from sensors connectable to the sensor device to the motor control unit via the fieldbus. The sensor device can forward the sensor signals to the motor control unit unfiltered via the fieldbus or perform preprocessing, such as filtering, of the sensor signals before forwarding the preprocessed signals via the fieldbus. In principle, any fieldbus known from the prior art can be used, for example, Modbus or Profibus. An operating parameter is typically understood to be a measured quantity or characteristic value that relates specifically to the operation of the borehole pump, the submersible pump, or the submersible agitator.In a simple case, the operating parameter refers, for example, to the instantaneous delivery rate of the borehole pump, submersible pump, or submersible agitator. The operating parameter can include, for example, measurement data, a signal, and / or a value. The operating parameter can represent a physical or dimensionless characteristic, refer to physical quantities, and / or be a dimensionless characteristic. The operating parameter can be selected from a rotational speed or the rotational speed of the electric motor of the borehole pump, submersible pump, or submersible agitator, a delivery head, an intermediate circuit voltage, a motor current, a temperature, an oscillation, a vibration, an electrical power, an operating voltage, a flow rate, and / or a vibration function of the borehole pump, submersible pump, or submersible agitator.

[0015] In a preferred further development of the borehole pump, submersible motor pump, or submersible motor agitator, the sensor system comprises a plurality of sensors that can be connected to the sensor system to detect a respective operating parameter of the borehole pump, submersible motor pump, or submersible motor agitator. The sensors can, for example, be designed as humidity sensors and / or temperature sensors. Alternatively, or in addition, the motor control unit itself can have further sensors, for example, also humidity and / or temperature sensors.

[0016] According to another preferred embodiment of the borehole pump, submersible pump, or submersible agitator, the sensor assembly comprises a sensor board and a plurality of sensor connectors for connecting the plurality of sensors. In this case, the sensor board itself may not contain any sensors; instead, the sensors may be located separately from the sensor board, for example, directly on the electric motor. The sensor assembly preferably has a sensor housing within which the sensor board and the sensor connectors are arranged. According to a further preferred embodiment of the borehole pump, submersible pump, or submersible agitator, the sensor assembly is arranged adjacent to the electric motor. Preferably, the sensor assembly is arranged on the electric motor and / or on an inverter of the electric motor.The proposed spatial separation of the sensor system and the motor control unit means that the motor control unit no longer needs to be located directly on the electric motor and / or the inverter, as is known from the prior art. This opens up the possibility of the embodiments discussed below, in which the motor control unit is located within and / or at a cable entry point and / or a connector for the electrical connection of the electric motor.

[0017] The borehole pump, submersible motor pump, and / or submersible motor agitator can, in principle, be designed as known from the prior art, in particular as a centrifugal pump. In this respect, the borehole pump and / or submersible motor pump, also called a submersible pump, can, in particular, have a pump housing preferably attached to and / or mounted on the motor housing, in which the impeller is provided. The impeller is preferably connected to the electric motor in a rotationally fixed manner by means of a shaft, in particular a motor shaft. In the case of the submersible motor agitator, the impeller is preferably designed as an agitator vane or propeller. The motor housing is preferably designed to be fluid-tight. The term "submerged motor housing" means that the motor housing, particularly during normal operation, is at least partially, and especially preferably completely, located in the medium to be pumped or agitated, for example, water and / or wastewater.Therefore, the term "submerged motor housing" is to be understood as meaning that the motor housing is at least partially, preferably completely, surrounded by the conveying or stirring medium.

[0018] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, it has a cable entry and / or a connector on the motor housing for electrically connecting the electric motor, with the motor control located within and / or on the cable entry and / or connector. Compared to conventional designs where the motor housing had to be opened to access the motor control for maintenance or repair, which is generally quite complex and time-consuming, the proposed solution eliminates the need to open the motor housing. Since, in the event of a malfunction, only the cable entry and / or the connector with the motor control provided therein and / or on it needs to be replaced, opening the motor housing is no longer necessary, thus significantly simplifying maintenance.By arranging the motor control at or in the cable entry and / or in the connector, the longevity and reliability of the borehole pump, submersible motor pump or submersible motor mixer is also improved.

[0019] In other words, in the proposed solution, the motor control unit is not located within the motor housing at a spatial distance from the cable entry and / or connector, for example, directly on the electric motor, but rather within and / or associated with the cable entry and / or connector. Such an arrangement does not preclude the possibility that the motor control unit could extend from the cable entry and / or connector into the motor housing, or even be located within the motor housing at or part of the cable entry and / or connector. Crucially, replacing the cable entry and / or connector can, and often does, necessitate replacing the motor control unit.

[0020] The cable entry and / or connector are preferably removable and arranged on the motor housing. The cable entry and / or connector can be designed in accordance with the prior art, in particular being dustproof, dirtproof, and / or moisture-proof for insertion into the motor housing. For example, the cable entry and / or connector can have a cylindrical, cylindrical, or oval-shaped housing that can be inserted into the motor housing.

[0021] Furthermore, the cable entry and / or connector may have a sealing ring, for example a rubber seal, a screw connection, for example a union nut and / or a cap, for compression and sealing by means of the rubber seal, and / or a threaded part for fixed connection to the motor housing. Likewise or alternatively, the cable entry and / or connector may have a clamping device, on the one hand for fastening to the motor housing and / or for securing and / or relieving strain on a connecting cable attached to the cable entry and / or connector for electrically connecting the electric motor.

[0022] The cable entry and / or connector can be made of plastic, for example polyamide, metal, and / or a combination thereof. The cable entry and / or connector can also be designed to connect the motor housing to a single connecting cable or to multiple connecting cables, particularly as a main and control cable entry. The connector can be a female or male connector, in particular a socket or plug, and a mating connector can be provided on the motor housing to which the connector can be connected. The cable entry and / or connector can also include conductors or wires for transmitting electrical control signals.

[0023] As already discussed, "provided within the cable entry and / or connector" means that the motor control is associated with the cable entry and / or connector. In contrast, in the prior art, the motor control is associated with the motor housing and / or the electric motor, for example, fixedly mounted inside or outside the motor housing. With the proposed solution, the motor control associated with the cable entry and / or connector can be replaced by replacing the cable entry and / or connector. The motor control includes, in particular, a microprocessor or microcontroller, which is, for example, integrated into and / or inserted into the cable entry and / or connector, or mounted on the cable entry and / or connector.

[0024] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the cable entry and / or the connector is routed through the motor housing and / or inserted into the motor housing. Preferably, the cable entry and / or the connector is designed to be fluid-tight, pressure-tight, and / or dust-tight as it passes through the motor housing. Preferably, the cable entry and / or the connector has a collar extending radially with respect to an insertion direction, which seals the opening around its perimeter, for example, by means of a gasket, against the ingress of the pumped medium or agitator medium into the motor housing. Particularly preferably, a circumferential groove is formed in the collar, which receives the gasket, for example, an O-ring seal. Further preferably, the cable entry and / or the connector is designed to be permanently installed in the motor housing.The term "routed through" or "inserted through" means, in particular, that at least part of the cable entry and / or connector is routed or inserted through the motor housing and is located inside the motor housing during normal operation. In this respect, for example, a first part of the cable entry and / or connector may be located outside the motor housing, while a second part, such as the plug contacts of the connector, is inserted into the motor housing, i.e., protrudes into the motor housing.

[0025] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the motor housing has an opening that can be closed, particularly fluid-tight and / or pressure-tight, by means of the cable entry and / or connector, and / or the cable entry and / or connector can be screwed to the motor housing. The opening is preferably circular, oval, or rectangular, although other shapes are also conceivable. Preferably, the opening is located on the top side of the borehole pump, submersible motor pump, or submersible motor agitator during normal operation. Preferably, the opening is submerged during normal operation, i.e., within the pumped or agitated medium. The cable entry and / or connector preferably has an outer shape corresponding to the opening.

[0026] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the cable entry and / or the connector has a housing that can be inserted from outside the motor housing through the opening into the motor housing such that, in the inserted state, the motor control unit is located inside the motor housing. Preferably, the motor control unit is located at least partially, and in particular completely, inside the motor housing in the inserted state. In this way, the motor control unit is protected against external influences. The housing is preferably at least partially insertable into the opening, in particular such that the housing projects through the opening. Preferably, the housing rests against the opening, in particular in contact with it, to seal the opening against the ingress of, for example, the pumped medium.

[0027] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the motor control unit is encapsulated within the cable entry and / or the connector, and / or the cable entry and / or the connector includes a connecting cable which is connected to the cable entry and / or the connector, in particular soldered, and encapsulated. The encapsulation is preferably carried out using a potting compound to protect the motor control unit against external influences and / or to ensure stable, permanent operation and / or a connection with the connecting cable. Epoxy resin, polyurethane, acrylates, and / or silicone, for example, can be used as the potting compound. Preferably, the motor control unit is encapsulated in such a way that the electronic components of the motor control unit are encapsulated with the potting compound, but the motor control unit is designed to be removable from and within the cable entry and / or the connector.For example, the motor control unit may have a circuit board connector, also called an edge connector or edge connector, by means of which the motor control unit is plugged onto the cable entry and / or the connector, especially inside the motor housing, during regular operation.

[0028] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the device has a vibration and / or acceleration sensor arranged within the motor control unit, particularly within the cable entry and / or the connector. According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the vibration and / or acceleration sensor is connected to the cable entry and / or the connector and / or the motor housing via vibration damping. Preferably, the vibration and / or acceleration sensor is rigidly connected to the cable entry and / or the connector and / or the motor housing, for example, by screws or rivets.

[0029] The vibration and / or acceleration sensor can also be rigidly connected to the cable entry and / or the connector and / or the motor housing by means of a rigid intermediate element, such as a metal mounting plate. Preferably, the vibration and / or acceleration sensor is configured to detect vibrations and / or oscillations up to 1 kHz, preferably up to 500 Hz, and particularly preferably up to 300 Hz. More preferably, the vibration and / or acceleration sensor is located within the motor housing in the installed state of the cable entry. Even more preferably, the vibration and / or acceleration sensor is arranged on the printed circuit board. The vibration and / or acceleration sensor is designed, for example, as a MEMS (Micro-Electro-Mechanical Systems) sensor or as a piezoelectric sensor and / or as a 1-axis, 2-axis, or 3-axis sensor.

[0030] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the motor control unit comprises a printed circuit board with a microprocessor or microcontroller mounted on it. The motor control unit is particularly Linux-based and / or includes a web server. The microprocessor or microcontroller is preferably configured to control the electric motor. For this purpose, the motor control unit can include a program that can be executed by the microprocessor or microcontroller to control the electric motor. Preferably, the motor control unit is configured to control the electric motor by means of externally received control signals, i.e., control signals received from outside the borehole pump, submersible motor pump, or submersible motor agitator. Linux-based means, in particular, that an operating system with a Linux kernel architecture is provided on the microprocessor or microcontroller.Preferably, the operating system is designed to be modifiable and / or configurable via the web server. Particularly preferably, the web server serves, on the one hand, to program the motor control and / or, on the other hand, to display and / or visualize operating parameters of the borehole pump, submersible pump, or submersible agitator. According to another preferred embodiment of the borehole pump, submersible pump, or submersible agitator, it has an inverter for the electric motor arranged within the motor housing, wherein the motor control is designed to monitor and / or control the inverter. The inverter is preferably located within an inverter housing and / or adjacent to the electric motor and / or adjacent to the cable entry and / or the connector. Preferably, the motor control is designed to monitor and / or control the inverter by means of at least one sensor.

[0031] In a further preferred embodiment of the borehole pump, submersible pump, or submersible agitator, the motor control is configured to control at least one additional electric motor of at least one additional borehole pump, at least one additional submersible pump, or at least one additional submersible agitator. The at least one additional borehole pump, at least one additional submersible pump, or at least one additional submersible agitator can, for example, be located adjacent to or at a distance from the borehole pump, submersible pump, or submersible agitator and / or be connected to it via an Ethernet interface.

[0032] Brief description of the drawings

[0033] The invention is explained in more detail below with reference to the accompanying drawings and by way of preferred embodiments.

[0034] The drawings show

[0035] Fig. 1 shows a schematic perspective view of a submersible motor pump according to a preferred embodiment of the invention.

[0036] Fig. 2 is a schematic perspective view of a partially opened submersible motor pump according to Fig. 1, Fig. 3 is a schematic perspective view of a cable entry of the submersible motor pump according to Fig. 1 according to a preferred embodiment of the invention,

[0037] Fig. 4 shows a schematic perspective view of the cable entry as shown in Fig. 3,

[0038] Fig. 5 shows a schematic perspective view of a sensor device of the submersible motor pump according to Fig. 1 according to a preferred embodiment of the invention, and

[0039] Fig. 6 shows a schematic partially opened side view of a submersible motor agitator according to a preferred embodiment of the invention.

[0040] Detailed description of the implementation examples

[0041] Fig. 1 shows a schematic perspective view of a submersible motor pump 1 according to a preferred embodiment of the invention, while Fig. 2 shows a schematic perspective partially opened view of the submersible motor pump 1 of Fig. 1.

[0042] The submersible motor pump 1 has a pump housing 2 with a motor housing 3 mounted axially above it in the plane of the drawing and screwed onto it. The pump housing 2 has an inlet 4 or suction port, provided axially below in the plane of the drawing and only indicated, through which a pumped medium, for example water or wastewater, is drawn in by means of an impeller provided in the pump housing 2 (not shown), and is then pumped out through an outlet nozzle 5 provided radially laterally on the pump housing 2.

[0043] Within the motor housing 3, which, like the pump housing 2, is made of metal, an electric motor 6 is provided, which drives the impeller by means of an axially extending motor shaft (not shown). The axially cylindrical motor housing 3, and correspondingly the pump housing 2 arranged axially below it in the plane of the drawing, are submerged; during normal operation, they are at least partially, and in particular completely, immersed in the pumped medium.

[0044] The motor housing 3 is made of two parts, which are connected to each other by axially extending screws. The electric motor 6 is arranged in the lower cylindrical part, while in the upper closed, hood-like part, an inverter 7 connected to the electric motor 6 is provided within a cylindrical inverter housing. On the outside of the upper hood-like part, a handle 8 for setting up and transporting the submersible motor pump 1 is integrally formed axially at the top in the plane of the drawing.

[0045] Two cable entries 9 are provided on the upper hood-like part. These entries are radially spaced from each other and from the handle 8. They pass through corresponding openings in the motor housing 3 at a slight axial angle to accommodate the main and control cables 10, which serve as connection cables for the submersible motor pump 1. While Fig. 1 shows both cable entries 9, the partially opened view of the submersible motor pump 1 in Fig. 2 shows only a single cable entry 9. Similarly, the submersible motor pump 1 may have only a single cable entry 9 for the main and control cables 10. The cable entry 9 can also be designed as a connector (not shown).

[0046] The cable entry 9, shown schematically in perspective in Fig. 3 and schematically in perspective and partially opened in Fig. 4, has a cylindrical metal housing 11 that passes through the opening of the motor housing 3 such that, during normal operation, an outer part is located outside the motor housing 3 and an inner part is located inside the motor housing. An oval-shaped collar 12, extending radially away from the cylindrical housing 11 in axial plan view, is provided on the outer part and abuts the motor housing 3.

[0047] The collar 12 has two oppositely arranged bores through which screws are passed into the motor housing 3 to permanently attach the cable entry 9 to the motor housing 3. The collar 12 has a groove extending around the cylindrical housing 11, into which an O-ring seal (not shown) is inserted, thus sealing the collar 12 and therefore the cable entry 9 against the motor housing 3 in a fluid-tight manner. The control cable 10 is inserted into the outside of the cylindrical housing 11 and is fluid-tightly fixed to the cable entry 9 by means of a union nut 13 and a sealing ring (not shown) compressed by the union nut 13.

[0048] A motor control unit 14 for controlling the electric motor 6 is provided within the cable entry 9. The motor control unit 14 is located on the inner part of the cable entry 9 and is therefore situated within the cable entry 9. During normal operation of the submersible pump 1, or when the cable entry 9 is installed, the motor control unit 14 is located within the motor housing 3. The motor control unit 14 comprises a printed circuit board 15 with a microprocessor 16 or a microcontroller mounted on it, as well as other electronic components provided on the printed circuit board 15. The microprocessor 16 has a Linux-based operating system on which a control algorithm for starting the electric motor 6 and for cleaning the submersible pump 1 runs.

[0049] The Linux-based operating system also runs a web server, which allows the control algorithm to be parameterized. Furthermore, the motor controller 14 is configured by means of the control algorithm to monitor and control the inverter 7. In addition, the control algorithm of the motor controller 14 is configured to receive sensor data, in particular pressure and / or temperature, from the submersible pump 1, specifically for controlling the submersible pump 1 and, if necessary, for fault diagnosis and / or reporting of the submersible pump 1. The control algorithm also allows the control of at least one additional electric motor of at least one additional submersible pump, which is located remotely or adjacent to the submersible pump 1.

[0050] Additionally or alternatively, a vibration and / or acceleration sensor 17 is provided within the cable entry 9 for detecting vibrations and / or accelerations of the borehole pump 1 in two, preferably three, dimensions in order to record an operating parameter of the borehole pump 1. The vibration and / or acceleration sensor 17 is arranged on the circuit board 15 and thus also on the inner part of the cable entry 9 and within the cable entry 9, as well as during regular operation of the submersible pump 1 or in its installed state within the motor housing 3. In this way, the vibration and / or acceleration sensor 17 is vibrationally connected to the cable entry 9 and to the motor housing 3. The vibration and / or acceleration sensor 17 is configured to detect vibrations and / or oscillations up to 1 kHz, preferably up to 500 Hz, and particularly preferably up to 300 Hz.

[0051] The motor control unit 14, including the circuit board 15 with the electronic components mounted on it, the microprocessor 16, and the vibration and / or acceleration sensor 17, is potted with a potting compound. The circuit board 14 is axially inserted into a corresponding socket 18 provided on the cable entry 9 by means of a connector provided on the circuit board, thus making the motor control unit 14 interchangeable. In its assembled state, the circuit board 14 extends from the socket 18 into the motor housing 3 and is covered by a plastic cap 19 that can be axially attached to the cable entry 9.

[0052] One end of the connecting cable 10 is also potted within the cable entry 9, and the connecting cable 10 is soldered to another circuit board provided within the cable entry 9. This additional circuit board may also include an Ethernet interface, in particular a Single Pair Ethernet interface, which can be contacted via the connecting cable 10. The Single Pair Ethernet interface is preferably designed according to an IEEE 802.3 SPE standard, for example, 802.3bp 2016-06, 802.3bw 2015-10, 802.3da, 802.3dg, 802.3cg 2019-11, or the like. Furthermore, this additional circuit board includes a socket 18 and two plugs 20, which, when the cable entry 9 is installed, extend axially into the motor housing 3. The plugs 20 can be used to connect wires for a safety circuit of the electric motor 6.

[0053] Furthermore, a sensor device 21, shown in Fig. 5, can be contacted via the connector 20, with the motor control 14 and the sensor device 21 communicating with each other via a fieldbus. The sensor device 21 is provided in a sensor housing 22, with Fig. 5 showing a sensor circuit board 23 removed from the partially shown sensor housing 22 in an exploded view.

[0054] As can be seen in Fig. 2, the sensor device 21 is spatially separated, and thus located at a distance, from the motor controller 14 and the cable entry 9 within the motor housing 3. Specifically, the sensor device 21 is located on the inverter 7 approximately 10 to 15 cm away from the cable entry 9 and, as described above, is connected to the motor controller 14 via the fieldbus. As can be seen in Fig. 5, a number of sensor connectors 24 are provided on the sensor circuit board 23, which can be connected to respective sensors 25 (shown only as examples) to detect a specific operating parameter of the submersible pump 1, for example, the temperature of the electric motor 6.

[0055] Instead of a submersible motor pump 1, the proposed solution can also be used with a borehole pump (not shown) or a submersible motor agitator 26, wherein a stirring impeller 27 of the submersible motor agitator 26 is to be understood as the impeller. Fig. 6 shows such a submersible motor agitator 26 in a schematically partially opened side view according to a preferred embodiment of the invention with the cable entry 9 and the sensor device 21. The same applies to the connector, which can be designed analogously to the cable entry 9.

[0056] The described embodiments are merely examples that can be modified and / or supplemented in various ways within the scope of the claims. Each feature described for a specific embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a specific category can also be used accordingly in an embodiment of another category. Reference numeral list

[0057] Submersible motor pump 1

[0058] Pump housing 2

[0059] Motor housing 3

[0060] Entrance 4

[0061] Outlet nozzle 5

[0062] Electric motor 6

[0063] Inverter 7

[0064] Handle 8

[0065] Cable entry 9

[0066] Main and control cable, connection cable 10

[0067] Case 11

[0068] Collar 12

[0069] 13

[0070] Engine control 14

[0071] Circuit board 15

[0072] Microprocessor 16

[0073] Vibration and / or acceleration sensor 17

[0074] Socket 18

[0075] Cap 19

[0076] Plug 20

[0077] Sensor device 21

[0078] Sensor housing 22

[0079] Sensor board 23

[0080] Sensor connector 24

[0081] Sensor 25

[0082] Submersible motor mixer 26

[0083] Stirring blade 27

Claims

Patent claims 1. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) with a submerged motor housing (3), an electric motor (6) arranged inside the motor housing (3) for driving an impeller of the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26), a motor control unit (14) arranged on the motor housing (3) for controlling the electric motor (6), and a sensor device (21) arranged inside the motor housing (3) for detecting at least one operating parameter of the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26), wherein the sensor device (21) is arranged spatially separate from the motor control unit (14) and is connected to the motor control unit (14) by means of a fieldbus.

2. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to the preceding claim, wherein the sensor device (21) comprises a plurality of sensors (25) connectable to the sensor device (21) for detecting a respective operating parameter of the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26).

3. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to the preceding claim, wherein the sensor device (21) comprises a sensor board (23) and a plurality of sensor connectors (24) provided thereon for connecting the plurality of sensors (25).

4. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the sensor device (21) is arranged adjacent to the electric motor (6).

5. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to the preceding claim, with a cable entry (9) arranged on the motor housing (3) and / or a connector arranged on the motor housing (3) for electrical connection of the electric motor (6), wherein the motor control (14) is arranged within the cable entry (9) and / or the connector.

6. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to the preceding claim, wherein the cable entry (9) and / or the connector is passed through the motor housing (3).

7. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the two preceding claims, wherein the motor housing (3) has an opening which can be closed in a fluid-tight and / or pressure-tight manner by means of the cable entry (9) and / or the connector, and / or the cable entry (9) and / or the connector can be screwed to the motor housing (3).

8. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to the preceding claim, wherein the cable entry (9) and / or the connector has a housing (11) which can be inserted from outside the motor housing (3) through the opening into the motor housing (3) such that in an inserted state the motor control (14) is arranged inside the motor housing (3).

9. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to one of the preceding four claims, wherein motor control (14) is encapsulated within the cable entry (9) and / or the connector and / or the cable entry (9) and / or the connector comprises a connecting cable (10) which is encapsulated with the cable entry (9) and / or the connector.

10. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, with a vibration and / or acceleration sensor (17) arranged within the motor control (14), in particular within the cable entry (9) and / or the connector according to one of the preceding five claims.

11. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to the preceding claim, wherein the vibration and / or acceleration sensor (17) is connected to the cable entry (9) and / or the connector and / or the motor housing (3) in a vibration-resistant manner.

12. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to any of the preceding claims, wherein the motor control (14) comprises a printed circuit board (15) with a microprocessor (16) or microcontroller arranged thereon, and the motor control (14) is in particular Linux-based and / or includes a web server.

13. Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, with an inverter (7) arranged inside the motor housing (3) for the electric motor (6), wherein the motor control (14) is designed to monitor and / or control the inverter (17).

14. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to one of the preceding four claims, wherein the motor control (14) is configured to control at least one further electric motor of at least one further borehole pump, at least one further submersible motor pump or at least one further submersible motor agitator.

Images