Downhole pump, submersible motor pump or submersible motor agitator

Abstract

The invention relates to a borehole pump, submersible motor pump (1) or submersible motor mixer (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 mixer (26), and a connecting cable (10) arranged on the motor housing (3) for electrically connecting the electric motor (6), wherein the connecting cable (10) has a motor control (14) for controlling the electric motor (6).

Description

Technical field

[0001] 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 connecting cable arranged on the motor housing for electrically connecting the electric motor. Background of the invention

[0002] Borehole pumps, submersible motor pumps and submersible motor mixers are known from the prior art.

[0003] 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. The motor housing is usually completely submerged in the pumped medium. The pumped medium 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.

[0004] Submersible pumps, also known simply as submersible pumps, are versatile and capable of handling large flow rates for clear and / or dirty water. They are particularly useful for drainage, well and drinking water supply, garden and pond irrigation, and industrial applications. A key characteristic of submersible pumps is that their motor housing is at least partially, and often completely, immersed in the pumped medium.

[0005] Submersible agitators are used to stir and mix liquids such as clear water, dirty water, and / or wastewater as the mixing medium and are often completely immersed in the mixing medium. Instead of an impeller, as used in borehole pumps and submersible pumps, the submersible agitator uses a similarly designed impeller or propeller. Submersible agitators are used in wastewater treatment plants, industrial processes, agriculture, and water purification.

[0006] These types of borehole pumps, submersible motor pumps, and submersible motor agitators use a motor control unit located inside the respective motor housing to control an electric motor also housed within the housing. In the event of a motor control unit failure, the motor housing often has to be opened, a complex process, to remove and replace the defective unit. Particularly in the aforementioned applications of borehole pumps, submersible motor pumps, and submersible motor agitators in wastewater treatment plants, industrial processes, or water purification, such a replacement often results in a lengthy and therefore costly interruption of operation. Description of the invention

[0007] 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 is interchangeable in a significantly simpler manner.

[0008] The object of the invention is achieved by the features of the independent claim. Advantageous embodiments are specified in the dependent claims.

[0009] Accordingly, the task is solved by a borehole pump, submersible motor pump or submersible motor mixer with a submerged motor housing, an electric motor arranged inside the motor housing for driving an impeller of the borehole pump, submersible motor pump or submersible motor mixer, and a connecting cable arranged on the motor housing for electrically connecting the electric motor, wherein the connecting cable has a motor control for controlling the electric motor.

[0010] Compared to conventional designs where the motor housing had to be opened to access the motor control unit for maintenance or repair, which is usually 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 connecting cable, specifically a cable entry point and / or a connector enclosed by the connecting cable, needs to be replaced with the motor control unit located within and / or attached to it, opening the motor housing is no longer necessary, thus significantly simplifying maintenance. By arranging the motor control unit on or, more specifically, within the connecting cable, preferably at or within the cable entry point and / or the connector, the durability and reliability of the borehole pump, submersible pump, or submersible agitator are also improved.

[0011] In other words, in the proposed solution, the motor control unit is not located within the motor housing at a spatial distance from the connecting cable, and in particular from the cable entry and / or connector, for example, directly on the electric motor. Instead, it is located within and / or associated with the connecting cable, and in particular with the cable entry and / or connector. Such an arrangement does not preclude the possibility that the motor control unit may extend from the connecting cable, and in particular the cable entry and / or connector, into the motor housing, or even be located within the motor housing, but attached to or part of the connecting cable, and in particular with the cable entry and / or connector. Crucially, replacing the connecting cable, and in particular the cable entry and / or connector, may also necessitate replacing the motor control unit.goes hand in hand.

[0012] 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 by means of a shaft, in particular a motor shaft, preferably in a rotationally fixed manner. In the case of the submersible motor agitator, the impeller is preferably designed as a 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.

[0013] The connecting cable, and in particular the cable entry and / or the connector, are preferably arranged in a removable manner on the motor housing. The connecting cable, and in particular the cable entry and / or the connector, can generally be designed as known from 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 the connector can have a cylindrical, cylindrical, or oval-shaped housing that can be inserted into the motor housing.

[0014] Furthermore, the connecting cable, and in particular the cable entry and / or the 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 connecting cable, and in particular the cable entry and / or the 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 the connecting cable connected to the cable entry and / or the connector for electrical connection of the electric motor.

[0015] 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 connecting cable, and in particular the cable entry and / or connector, can also include conductors or strands for transmitting electrical control signals.

[0016] As already discussed, "provided on and, in particular, within the connecting cable, and especially within the cable entry and / or the connector" means that the motor control is associated with the connecting cable, and especially with the cable entry and / or the 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 connecting cable, and especially with the cable entry and / or the connector, can be replaced by replacing the connecting cable, and especially with the cable entry and / or the connector.The motor control includes in particular a microprocessor or microcontroller, which is, for example, integrated and / or inserted into the connecting cable and in particular the cable entry and / or the connector, or placed on the connecting cable and in particular the cable entry and / or the connector.

[0017] In a preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable comprises a cable entry and / or a connector containing the motor control unit. The motor control unit is located within, in, and / or on the cable entry and / or connector, and / or the cable entry and / or connector is routed through and / or inserted into the motor housing. Preferably, the cable entry and / or 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 connector has a collar extending radially with respect to an insertion direction, which seals the opening around its circumference, for example, by means of a gasket, against the ingress of the pumped medium or agitator medium into the motor housing.A circumferential groove is preferably formed in the collar to accommodate the seal, for example, an O-ring seal. Furthermore, the cable entry and / or connector is preferably designed to be permanently installed in the motor housing. The terms "passed through" and "inserted through" mean, in particular, that at least a part of the cable entry and / or connector passes through or is inserted into 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 can be located outside the motor housing, while a second part, for example, the plug contacts of the connector, is inserted into the motor housing, i.e., protrudes into the motor housing.

[0018] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable includes a cable entry and / or a connector with motor control, and the motor housing has an opening that can be sealed, particularly fluid-tight and / or pressure-tight, by the cable entry and / or the connector. 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 the connector preferably has an outer shape corresponding to the opening.

[0019] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable comprises a cable entry and / or a connector containing the motor control unit. The cable entry and / or 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 is in contact with the opening in order to seal the opening against ingress of, for example, the conveyed medium.

[0020] According to a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable comprises a cable entry containing the motor control unit and / or a connector containing the motor control unit. The motor control unit is encapsulated within the cable entry and / or the connector, and / or the connecting cable is encapsulated with the cable entry and / or the connector, and / or the connecting cable is connected to a circuit board of the motor control unit, in particular by soldering and encapsulation. The encapsulation is preferably carried out using a potting compound to protect the motor control unit against external influences and / or to ensure stable, long-lasting operation and / or a secure connection with the connecting cable. For example, epoxy resin, polyurethane, acrylates, and / or silicone can be used as the potting compound.Preferably, the motor control unit is potted in such a way that the electronic components of the motor control unit are encapsulated by the potting compound, but the motor control unit itself is designed to be removable from and within the cable entry and / or the connector. For example, the motor control unit can have a PCB connector, also called an edge connector, by means of which the motor control unit is plugged onto the cable entry and / or the connector, particularly within the motor housing, during normal operation.

[0021] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable comprises a cable entry and / or a connector with motor control, and the cable entry and / or connector can be screwed to the motor housing. Preferably, the cable entry and / or connector has a nut that can be screwed onto a thread of the motor housing, in a fluid-tight and / or dust-tight manner. Particularly preferably, the nut is provided with a seal, for example, a circumferential O-ring seal. Further preferably, the connecting cable can be screwed to the motor housing, in particular by means of the nut.

[0022] According to a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the motor control comprises a printed circuit board with a microprocessor or microcontroller mounted thereon, wherein the motor control is preferably based on Linux and / or includes a web server. The microprocessor or microcontroller is preferably configured to control the electric motor. For this purpose, the motor control can include a program that can be executed by the microprocessor or microcontroller to control the electric motor. Preferably, the motor control 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. The web server is particularly preferably used, on the one hand, for programming the motor control and / or, on the other hand, for displaying and / or visualizing operating parameters of the borehole pump, the submersible pump, or the submersible agitator.

[0023] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable, in particular the cable entry and / or the connector, comprises an Ethernet interface, especially a single-pair Ethernet interface, wires for a safety circuit of the electric motor, and / or a connecting cable for the electric motor. An advantage of this embodiment lies in simpler wiring and the use of standard cables, since no special, and consequently more expensive, data cables are required. Preferably, the Ethernet interface is accessible via the connecting cable and / or the connecting cable includes wires for contacting the Ethernet interface. The connecting cable preferably comprises a main line and a control line, i.e., on the one hand a power cable and on the other hand a line for transmitting control signals for controlling the electric motor.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. The cable entry and / or connector preferably has at least one plug located inside the motor housing for connecting the wires for the electric motor's safety circuit.

[0024] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the motor control comprises a control algorithm for starting the electric motor and / or cleaning the borehole pump, submersible motor pump, or submersible motor agitator. The control algorithm can be programmable, for example, comprising multiple sequences and / or algorithms for cleaning depending on the type of blockage, such as by repeatedly starting the electric motor and / or operating the electric motor in different directions of rotation.

[0025] In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the pump / agitator has an inverter for the electric motor arranged within the motor housing, wherein the motor control is configured 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 configured to monitor and / or control the inverter by means of at least one sensor as described below.

[0026] According to another preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the connecting cable includes a cable entry and / or a connector containing the motor control, and a vibration and / or acceleration sensor is provided on and / or within the cable entry and / or the connector. The vibration and / or acceleration sensor is preferably connected to the cable entry 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.

[0027] 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 cable entry state. 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.

[0028] Positioning the vibration and / or acceleration sensor on, in, and / or inside the cable entry and / or connector allows for more accurate measurements, as vibrations from the motor housing and / or pump housing can be transmitted more precisely to the vibration and / or acceleration sensor at its predefined position on and / or inside the cable entry and / or connector. Compared to prior art solutions where vibration and / or acceleration sensors are mounted on circuit boards inside the motor housing, this arrangement of the vibration and / or acceleration sensor on and / or inside the cable entry and / or connector results in higher efficiency and accuracy of the measurements.

[0029] The proposed arrangement of the vibration and / or acceleration sensor reduces maintenance time and resource expenditure, as opening the motor housing is no longer necessary to replace a defective sensor. Furthermore, placing the vibration and / or acceleration sensor at and / or within the cable entry and / or connector increases the service life and reliability of the borehole pump, submersible pump, or submersible agitator. Compared to vibration and / or acceleration sensors on circuit boards inside the motor housing, relocating the sensor to and / or within the cable entry and / or connector facilitates improved sensor signal quality and measurement accuracy.Overall, this arrangement provides a simplified, efficient and more accurate solution for borehole pumps, submersible motor pumps and submersible motor mixers.

[0030] 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, submersible pump, or submersible agitator. In other words, the motor control is configured, for example, by means of a suitable program, to control at least one additional borehole pump, submersible pump, or submersible agitator. The at least one additional borehole pump, submersible pump, or 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.

[0031] According to another preferred embodiment of the borehole pump, submersible motor pump or submersible motor mixer, this / they comprise a sensor device arranged within the motor housing for detecting at least one respective operating parameter of the borehole pump, submersible motor pump or submersible motor mixer, wherein the sensor device is arranged spatially separate from the motor control and is connected to the motor control by means of a fieldbus.In a further preferred embodiment of the borehole pump, submersible motor pump, or submersible motor agitator, the sensor device comprises a plurality of sensors connectable to the sensor device for detecting a respective operating parameter of the borehole pump, submersible motor pump, or submersible motor agitator. The sensor device includes a sensor board and a plurality of sensor connectors provided thereon for connecting the plurality of sensors, and / or the sensor device is arranged adjacent to the electric motor. Therefore, it is possible that no sensors are located on the sensor board itself, but rather that the sensors are arranged separately from the sensor board, for example, directly on the electric motor.

[0032] Accordingly, the motor control unit is designed to be spatially separated from the sensors, which are, for example, mounted on the electric motor. The sensor unit preferably includes a microcontroller or similar device to transmit sensor signals received from the sensors to the motor control unit via the fieldbus. The sensor unit can either 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. The sensor unit preferably includes a sensor housing containing the sensor board and sensor connectors. In principle, any fieldbus known from the prior art can be used, such as Modbus or Profibus.The sensors can be designed, for example, as humidity sensors and / or temperature sensors. Alternatively, or in addition, the motor control unit can have further sensors, such as humidity and / or temperature sensors.

[0033] An operating parameter is typically understood to be a measured quantity or characteristic value that relates specifically to the operation of a borehole pump, submersible pump, or 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 dimensioned characteristic value, refer to physical quantities, and / or be a dimensionless characteristic value. The operating parameter can be selected from a rotational speed or...a 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, a oscillation, a vibration, an electrical power, an operating voltage, a volume flow and / or a vibration function of the borehole pump, submersible pump or submersible agitator.

[0034] According to another preferred embodiment of the borehole pump, submersible pump, or submersible agitator, the motor control unit is configured to process sensor data, in particular pressure and / or temperature, from the borehole pump, submersible pump, or submersible agitator, especially for controlling the borehole pump, submersible pump, or submersible agitator, and / or to perform fault diagnosis and / or fault reporting of the borehole pump, submersible pump, or submersible agitator. Preferably, the motor control unit comprises a control algorithm and / or a program by means of which the sensor data can be processed and / or fault diagnosis and / or fault reporting can be performed. Brief description of the drawings

[0035] The invention is explained in more detail below with reference to the accompanying drawings and by way of preferred embodiments.

[0036] The drawings show Fig. 1 a schematic perspective view of a submersible motor pump according to a preferred embodiment of the invention, Fig. 2 a schematic perspective partially opened view of the submersible motor pump according to Fig. 1 , Fig. 3 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, Fig. 4 shows a schematic perspective partially opened view of the cable entry. Fig. 3 , Fig. 5 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 Fig. 6 a schematic partially opened side view of a submersible motor mixer according to a preferred embodiment of the invention. Detailed description of the implementation examples

[0037] Fig. 1shows a schematic perspective view of a submersible motor pump 1 according to a preferred embodiment of the invention, while Fig. 2 a schematic perspective partially opened view of the submersible motor pump 1 of the Fig. 1 shows.

[0038] 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 (not shown) provided in the pump housing 2, and then pumped out through an outlet nozzle 5 provided radially laterally on the pump housing 2.

[0039] 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.

[0040] 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 an inverter 7, connected to the electric motor 6, is provided in the upper closed, hood-like part within a cylindrical inverter housing. A handle 8 for setting up and transporting the submersible motor pump 1 is integrally formed on the outside of the upper hood-like part, axially at the top in the plane of the drawing.

[0041] Two cable entries 9 are provided on the upper hood-like part, each radially spaced from each other and from the handle 8, through corresponding openings and slightly inclined axially through the motor housing 3 for the insertion of main and control lines 10 as connection cables for the submersible motor pump 1. Fig. 1Both cable entries 9 are shown in the partially opened view of the submersible motor pump 1. Fig. 2 Only a single cable entry 9 is shown. Similarly, the submersible motor pump 1 may have only a single cable entry 9 for the main and control lines 10. The cable entry 9 may also be designed as a connector (not shown).

[0042] The in Fig. 3 schematically, perspectively, and in Fig. 4 The cable entry 9, shown schematically in perspective and partially opened, 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The motor control unit 14 can alternatively or additionally be provided at the cable entry point 9 and / or the connector. It is also possible that the motor control unit 14 is provided on the connecting cable 10, for example, inside the connecting cable 10 or attached to the connecting cable 10.

[0047] 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.

[0048] 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 encapsulated 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 cap 19 made of metal, in particular die-cast zinc, or plastic, which can be axially attached to the cable entry 9.

[0049] 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.

[0050] Furthermore, connector 20 allows for a connection in Fig. 5The sensor device 21 shown can be contacted, wherein the motor control 14 and the sensor device 21 communicate with each other via a fieldbus. The sensor device 21 is provided in a sensor housing 22, wherein in Fig. 5 A sensor board 23 is shown removed from the sensor housing 22, which is only partially shown, in the manner of an exploded view.

[0051] As from Fig. 2 As can be seen, the sensor device 21 is spatially separated, and therefore not located, from the motor control unit 14 or 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 control unit 14 via the fieldbus. As shown in the diagram, the sensor device 21 is located approximately 10 to 15 cm away from the cable entry 9 and is connected to the motor control unit 14 via the fieldbus. Fig. 5As can be seen, a plurality 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 record a respective operating parameter of the submersible motor pump 1, for example temperature of the electric motor 6.

[0052] 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, where a stirring vane 27 of the submersible motor agitator 26 is to be understood as an impeller. Fig. 6 Figure 1 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.

[0053] 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 particular embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular category can also be used accordingly in an embodiment of a different category. Reference symbol list

[0054] Submersible motor pump 1 Pump housing 2 engine housing 3 inlet 4 Outlet nozzle 5 electric motor 6 inverter 7 Handle 8 cable entry 9 Main and control cable, connection cable 10 Housing 11 collar 12 union nut 13 Engine control 14 Circuit board 15 microprocessor 16 Vibration and / or acceleration sensor 17 socket 18 cap 19 Plug 20 Sensor system 21 Sensor housing 22 Sensor board 23 Sensor connector 24 sensor 25 Submersible motor agitator 26 agitator blades 27

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), and a connecting cable (10) arranged on the motor housing (3) for electrically connecting the electric motor (6), wherein the connecting cable (10) comprises a cable entry (9) having a motor control (14) for controlling the electric motor (6) and / or a connector having the motor control (14), and the motor housing (3) has an opening which can be closed by the cable entry (9) and / or the connector in a fluid-tight and / or pressure-tight manner. 2.borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to the preceding claim, wherein the connecting cable (10) comprises a cable entry (9) having the motor control (14) and / or a connector having the motor control (14), the motor control (14) is provided inside and / or on the cable entry (9) and / or the connector, and / or the cable entry (9) and / or the connector is passed through the motor housing (3). 3.Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the connecting cable (10) comprises a cable entry (9) having the motor control (14) and / or a connector having the motor control (14) and 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). 4.Borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the connecting cable (10) comprises a cable entry (9) having the motor control (14) and / or a connector having the motor control (14) and the motor control (14) is potted inside the cable entry (9) and / or the connector and / or the connecting cable (10) is potted with the cable entry (9) and / or the connector, and / or the connecting cable (10) is connected, in particular soldered, and potted with a circuit board (15) of the motor control (14). 4.borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the connecting cable (10) comprises a cable entry (9) having the motor control (14) and / or a connector having the motor control (14) and the cable entry (9) and / or the connector can be screwed to the motor housing (3).

6. borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the motor control (14) comprises a printed circuit board (15) with a microprocessor (15) or microcontroller arranged thereon, and the motor control (14) is in particular Linux-based and / or comprises a web server. 7.borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the connecting cable (10) comprises an Ethernet interface, in particular a single pair Ethernet interface, strands for a safety circuit of the electric motor (6) and / or a connecting cable (10) for the electric motor (6).

8. borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to any of the preceding claims, wherein the motor control (14) comprises a control algorithm for starting the electric motor (6) and / or for cleaning the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26). 9.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 (7).

10. borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding claims, wherein the connecting cable (10) comprises a cable entry (9) having the motor control (14) and / or a connector having the motor control (14) and a vibration and / or acceleration sensor (17) is provided within the cable entry (9) and / or the connector. 11.borehole pump, submersible motor pump (1) or submersible motor mixer (26) according to one of the preceding 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 mixer.

12. Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to one of the preceding claims, with a sensor device (21) arranged within 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 (14) and is connected to the motor control (14) by means of a fieldbus. 13.borehole pump, submersible motor pump (1) or submersible motor agitator according to the preceding claim, wherein the sensor device (21) comprises a plurality of sensors 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), 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, and / or wherein the sensor device (21) is arranged adjacent to the electric motor (6). 14.Borehole pump, submersible motor pump (1) or submersible motor agitator (26) according to one of the preceding claims, wherein the motor control (14) is configured to process sensor data, in particular pressure and / or temperature, from the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26), in particular for the purpose of controlling the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26) and / or wherein the motor control (14) is configured to perform a fault diagnosis and / or fault message of the borehole pump, the submersible motor pump (1) or the submersible motor agitator (26).

Images