WO2009043535A1

WO2009043535A1 - Retaining mechanism for a centrifugal pump arrangement

Info

Publication number: WO2009043535A1
Application number: PCT/EP2008/008126
Authority: WO
Inventors: Manfred Prangenberg; Daniel Gontermann; Oliver Fischer
Original assignee: Ksb Aktiengesellschaft
Priority date: 2007-09-27
Filing date: 2008-09-25
Publication date: 2009-04-09
Also published as: DE102007046674A1

Abstract

The invention relates to a retaining mechanism for mounting an electromechanical and/or electronic device for a centrifugal pump arrangement comprising a centrifugal pump and an electric motor, especially a standard motor that has a motor terminal box. Said retaining mechanism encompasses a receiving element which can be or is connected to the device and is fitted with means for mechanically connecting the device to the receiving element. The receiving element (4, 16) has an electrical terminal unit (6, 22) which is to be connected to a voltage supply system and which is electrically connected to the electric motor (2). The terminal unit (6, 22) is equipped with means for electrically and/or mechanically connecting the device to the receiving element (4, 16).

Description

Holding device for a centrifugal pump arrangement

description

The invention relates to a holding device for the attachment of an electro-mechanical and / or electronic device for a centrifugal pump assembly with centrifugal pump and electric motor, in particular provided with motor terminal box standard motor, with a device connectable or connected to the receiving element, wherein the receiving element means for mechanical connection of the device having the receiving element.

In a centrifugal pump arrangement, which consists inter alia of one or more centrifugal pumps and / or one or more electric motors and / or one or more centrifugal pump units, increasingly electromechanical and / or electronic devices are to be mounted or arranged on the centrifugal pump assembly and / or its environment.

From DE 10 2006 023 050 A1 discloses a holding device for the attachment of an electronic device, in particular a frequency converter, on an air-cooled, provided with cooling fins electric motor, in particular standard motor known. Between device and electric motor several holding components are arranged. The distance between the device and the electric motor is bridged by a receiving element connected to the device and a plurality of holding elements connected to the receiving element and resting against the electric motor. Here are the holding elements and / or in constructive open spaces of the electric motor to transmit power. This creates a little expensive attachment of a device to an electric motor. However, the necessary for an operation of the unit producing the electrical connection of the device to the supply voltage and the electrical connection of the device to the electric motor is subject to the usual connection expense. A subsequent maintenance of the device and / or a subsequent replacement of a device require time-consuming connection and assembly work.

DE 199 57 064 A1 discloses a cover of a motor connection box with an electronic circuit for the electrical influencing of an electric motor. The cover has an electrical and mechanical interface for placement on other, different types of parts, for example, an intermediate part of a motor connection box with connection devices for power supply lines, wherein the intermediate part has at least three electrical lines for power to the cover. The lid is electrically connected by means of a connector with the intermediate part. The electronic circuit in the cover of the motor connection box has control and power electronics. By replacing a lid, the functionality of an electric motor can be changed. However, the disadvantage is the predetermined by the dimensions of the motor connection box and limited installation dimensions for the electronic circuit. This requires the use of special, integrable components and additional thermal barriers. In addition, the cover construction must be adapted to the respective motor connection box.

The invention is therefore based on the object to provide an improved holding device with a receiving element for a number of to be attached to a centrifugal pump assembly or its environment electromechanical or electronic devices that allows a quick and inexpensive to connect the same.

The object is achieved according to the invention in that the receiving element has an electrical connection unit for connection to a voltage network, that the connection unit is electrically connected to the electric motor and the connection unit has means for the electrical and / or mechanical connection of the device to the receiving element.

The receiving element is connected via its connection unit on the one hand with a voltage network and with the electric motor, on the other hand, this means for electrical Änbindung a device to be fastened. A device is connected by means of the connection unit with the voltage network and with the electric motor. Thus, it represents the electrical interface of an arrangement consisting of electric motor and to be attached electromechanical and / or electronic device. The receiving element of a holding device according to the invention is designed as a docking station, can be placed or connected to the various devices. Devices include power dividers, in particular frequency converters or devices with phase control, electronic motor starters, such as soft-starters, devices based on contactors or contactor combinations, such as contactor combinations for direct start, star-delta starting or pole switching, as well as power supplies, motor protection switches, pole switches, power, Voltage, power meters or cos-phi measuring devices, devices for phase failure monitoring, devices based on relays and / or direction of rotation control devices. The invention is also advantageously usable with electromechanical and / or electronic devices or equipment without effect on the mains or motor line and with functions relating to the engine-driven work machine, such as a pump monitor.

According to one embodiment of the invention, the connection unit has means for pluggable connection of the device with the receiving element. In this case, the connection unit can have both means for electrical connection, such as plug contacts and / or sockets, as well as means for mechanical connection, such as clamping and / or snap-in connections. Thus, a quick connection of a device is guaranteed to a receiving element. The connection unit has a plurality of electrical connection positions. It is advantageous if the terminal positions are formed by touch-safe plug contacts and / or sockets. This makes it possible to connect a device quickly and safely.

The connection unit has connection positions for connecting the device to a single-phase or multi-phase AC voltage network. In this case, a certain number of terminals is provided with a specific occupancy. In a preferred embodiment which is suitable for the supply of a three-phase AC voltage network, that is to say a three-phase network, connection positions for three phase connections L1, L_2, L3, a neutral conductor N and a protective conductor PE _Net Z are provided. For a single-phase network, a phase connection, a neutral connection and a protective conductor connection are provided on the connection unit.

In particular, it is provided to equip a connection unit with a sufficient number of terminal assignments for a plurality of configurations occurring, in particular within a series, and to occupy a required subset of the connection positions as required. Thus, a receiving element with its connection unit for different voltage networks and / or different device and electric motor combinations is suitable.

Furthermore, the connection unit has connection positions for connecting the device to the electric motor. The pre-assigned connection positions serve in particular for the connection of single-phase or three-phase asynchronous motors without or with one or more winding temperature sensors, such as PTC sensors and / or bimetallic sensors.

The three-phase motors are either internally connected or not. In electric motors, whose inrush current is to be reduced by a star-delta start, usually all six winding connections are led to the outside, at motor The motor windings are already connected internally in star or delta by means of corresponding connections of the motor terminals within the motor terminal box or motor terminal box, which are operated directly at the mains. Then it is sufficient to lead only three of the winding connections from the motor terminal box to the receiving element.

A certain number of reserve connection positions may be provided which, for example, serve to connect further sensors used on a centrifugal pump arrangement.

Other types of motors such as servomotors and DC motors can be connected to the connection unit of the holding device according to the invention.

As a usable for various engine types and largely universally usable occupation of the connection positions, it is provided that the terminal unit provides at least six motor terminals U1, V1, W1, U2, V2, W2, a protective earth PE _motor and two connections for a motor winding probes are available.

It is envisaged that the connection unit is connected via a separate connecting line to the motor terminal box. In this case, the suitable terminals are guided by means of a connecting line to the terminal unit of the electric motor and in particular of the terminal box and placed there existing connections. Of these, there is a connection within the connection unit to the individual device connection positions.

The motor cable can be designed with a screen, in particular for operation on a frequency converter. The shield can be attached to the connection unit. It has proven to be useful to lead a screen of the connecting line directly to a housing of the connection unit and connect. Incidentally, the receiving element can be held on the electric motor by means of holding elements, which makes it possible to use one and the same receiving element for different engine sizes. The receiving element itself can be designed such that different devices of different types are connectable to this. The receiving element may alternatively by means of fastening means in the environment L of the centrifugal pump assembly, in particular on a wall, be mounted.

Of course, it is also possible that the receiving element consists of several optionally separately arranged parts.

It is advantageous if the receiving element is connected via pluggable connections with the motor terminal box. This ensures that the electrical connections still to be produced for operation of a centrifugal pump arrangement can also be carried out quickly and safely.

It is also provided that the receiving element is arranged with connection unit on a motor terminal box of the electric motor. As a result, the connecting line is saved from receiving element to the engine. For this purpose, the receiving element with the motor terminal box, if necessary, mechanically connected by means of a terminal box adapter, for example, be screwed. Such a motorfabrikatabhän-giger terminal box adapter has on its side facing the motor terminal box bottom, for example. A motor-dependent arrangement of mounting holes and on its receiving element facing the top of a standardized arrangement of mounting holes. Thus, always the same receiving element is used in different engines. It is expedient that the connection unit is arranged within the receiving element and / or over the connection terminals of the motor terminal box, whereby the connection unit can be electrically connected to the terminal box in a simple manner. Alternatively, it is provided that the receiving element is integrated in the electric motor housing. The receiving element forms a structural unit with the electric motor housing, which offers cost advantages in addition to constructive advantages in series with large numbers.

Ideally, the receiving element has means for permutation-free attachment of a device. This eliminates the possibility of core wiring when connecting a device with conventional connection techniques and prevents reverse polarity.

According to a further embodiment, it is provided that the receiving element has a connection unit which is arranged on the edge of the receiving element and / or whose outer contour has a tapered region. By such an arrangement and design of the connection unit, an advantageous cable outlet is achieved, which allows a simple installation of the receiving element according to the invention both the unit or electric motor and on a wall while maintaining predetermined bending radii. It is also advantageous to arrange the connection positions in the tapered region of the connection unit.

Further advantages result from the fact that the housing of the device to be fastened has an interface for connection to the connection unit and optionally an interface to other devices. Ideally, while the device to be fastened on the underside of the device on a recess in the housing. At this point, the device carries its connection contacts, which are to be brought into electrical connection with the connection positions of the connection unit of the receiving element. For this purpose, the device with the housing recess in a simple manner on the connection unit of a receiving element can be placed and connected.

The device to be attached may also have a connection or interface unit for electrical connection to other devices and a receiving area for have tere devices. This allows a number of different modules to be combined or coupled together.

It is also envisaged that the device to be fastened on the top of the device has the same contour and the same connection positions as the receiving element. As a result, zwigeji actual device and recording element even more equipment or resources can be installed. This permits, for example, an optional use of EMC filters or line reactors to be arranged between the receiving element and the device.

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

Fig. 1 is a centrifugal pump assembly with a motor-mounted receiving element, the

Fig. 2 shows a receiving element with its electrical connection positions, and the

Fig. 3 is a arranged by means of a terminal box adapter on a motor terminal box receiving element.

FIG. 1 is a schematic view showing a centrifugal pump assembly having a centrifugal pump 1 connected to an electric motor 2. On the electric motor 2, a receiving element 4 is arranged on holding elements 3. The electric motor 2 has a terminal box 5. The receiving element 4 has means - not shown here - for mechanical connection to an electromechanical and / or electronic device. According to the invention, the receiving element 4 has an electrical connection unit 6. Via line 7, the electrical connection unit is connected to an electrical alternating voltage network, in this case a three-phase three-phase network. the. Furthermore, the electrical connection unit 6 is electrically connected to the electric motor 2 via line 8. In addition, the connection unit 6 - not shown here - means for mechanical connection of the device with the receiving element 4.

In Fig. 2, an inventive receiving element 4 is shown in more detail. The receiving element 4 has for mechanical connection to an electromechanical and / or electronic device on a - possibly interrupted - rail 10. An electromechanical and / or electronic device to be fastened to the receiving element 4 can thus be pushed onto the receiving element 4. It can be seen that the connection unit 6 has a plurality of electrical connection positions 11, 12. These serve a pluggable electrical connection of an electromechanical and / or electronic device with the receiving element 4. On the one hand, the connection unit 6 has different terminal positions 11 for connecting the device to a single-phase or multi-phase AC voltage network. In this embodiment, there are connection positions for three phase connections - here with L1, L2, L3 - a - not shown here - neutral terminal N and a PE conductor PE _Net z- Furthermore, the terminal unit 6 has a plurality of terminal positions 12 for connecting the device to the Electric motor 2 on. In the embodiment shown, these are to six motor terminals UI ₁ VI ₁ WI, U2, V2, W2, a ground wire connection PE _moto r as well as two connections for a motor coil sensor 13, 14 a provided with such assignment of the connection positions connection unit 6 for various Motor types usable and largely universally usable.

However, the invention is not limited to these. In principle, it is provided to equip a connection unit with a sufficient number of terminal assignments for a plurality of configurations, in particular occurring within a series, and to occupy a required subset of the connection positions as required. Thus, a receiving element with its connection unit for various Voltage networks and / or various devices and electric motor combinations suitable. Thus, it is equally well provided to provide connection positions for a plurality of winding temperature sensors such as PTC sensors and / or bimetallic sensors in a receiving element.

Also, a certain number of reserve connection positions may be provided. This allows the connection of other sensors used on a centrifugal pump assembly. In the exemplary embodiment shown, six motor connection elements are provided. This is useful for three-phase motors whose inrush current must be reduced by a star-delta start-up. For motors that are operated directly on the mains, the motor windings are already connected internally in the star or delta connection by means of appropriate connections of the motor terminals within the motor terminal box. Then it may be sufficient to lead only three of the winding terminals from the motor terminal box to the receiving element.

The connection unit 6 is connected in FIG. 2 via a separate connecting line 8 to the motor terminal box 5 of the electric motor 2 shown in FIG. The suitable by the electric motor and in particular its terminal box 5 terminals are guided by means of connecting line 8 to the terminal unit 6 and placed on the existing there connections. A connection to the individual device connection positions 12 exists within the connection unit 6. A screen of the motor line 8 (not shown here) can also be attached to the connection unit 6. For this purpose, the screen is guided on the housing of the connection unit 6. The terminal unit 6 is made of metal to achieve an electromagnetic shielding effect. The shield, which is guided with the connection cable 8 and an EMC screw 15 to the connection unit 6, finds its continuation through the metallic housing of the connection unit.

An inventive receiving element 4 can, as shown in Fig. 1, be held by means of holding elements 3 on the electric motor 2. This is a use of and allows the same receiving element for different engine sizes. Alternatively, such a receiving element 4 by means of fastening means, such as screws, also be mounted in the vicinity of a centrifugal pump assembly. The receiving element 4 may for example be mounted on a separately arranged base and / or a wall. It is advantageous that the receiving element 4 has a connection unit 6 which is arranged on the edge of the receiving element 4 and / or whose outer contour has a bevelled area. By such an arrangement and configuration of the connection unit 6, an advantageous cable outlet is achieved, designed in compliance with predetermined bending radii simple assembly of the receiving element according to the invention both on a centrifugal pump assembly and / or centrifugal pump assembly and in their environment.

Fig. 3 shows another receiving element 16 which can be arranged on a motor terminal box 17 with mains supply line 18. For this purpose, a terminal box adapter 19 is mounted on the motor terminal box 17, which has a motor-dependent arrangement of mounting holes 20 and on its the receiving element 16 facing top of a standardized arrangement of mounting holes 21 from its motor terminal box 17 facing bottom. For fastening the receiving element 16 to the terminal box adapter 19, the receiving element 16 has a plurality of fastening holes 26.

Within the receiving element 16, the connection unit 22 is arranged. In this case, the connection unit 22 is located above the connection terminals 25 of the motor terminal box 17, whereby the connection unit 22 can be electrically connected in a simple manner to the terminal box 16 and its terminals 25. The electrical connection can be made for example by a pluggable cable connection. The connection unit 22 is equipped with plug contacts 23 and sockets 24 corresponding to the connection positions 11, 12 according to FIG. 2. The arrangement of plug contacts 23 and sockets 24 ensures a reverse polarity connection of a device to be fastened. In the illustrated solution, the connecting line 8 is saved from receiving element to the electric motor in comparison to FIG. The terminal box adapter 19 is motor-dependent available and allows always to use the same receptacle with different engines. Alternatively, a connection of terminal box to the receiving element can also be produced by a guided in the receiving element or a special substructure line.

Claims

claims

1. Holding device for the attachment of an electromechanical and / or electronic device for a centrifugal pump assembly with centrifugal pump and electric motor, in particular provided with motor terminal box standard motor, with a connectable or connected to the device receiving element, the receiving me- Means for mechanically connecting the device with the Receiving element, characterized in that the receiving element (4, 16) has an electrical connection unit (6, 22) for connection to a voltage network, that the connection unit (6, 22) to the electric motor (2) is electrically connected and that the connection unit (6, 22) means for electrical and / or mechanical connection of the device with the receiving element (4, 16).

2. Holding device according to claim 1, characterized in that the connection unit (6, 22) has means (23, 24) for pluggable connection of the device with the receiving element (4, 16).

3. Holding device according to claim 1 or 2, characterized in that the connection unit (6, 22) has a plurality of electrical connection positions (11, 12, 13, 14).

4. Holding device according to claim 1, 2 or 3, characterized in that the connection positions (11, 12, 13, 14) are formed by touch-safe plug contacts and / or sockets.

5. Holding device according to one of claims 1 to 4, characterized in that the connection unit (6, 22) has connection positions (11) for connecting the device to a single- or multi-phase AC voltage network.

6. Holding device according to one of claims 1 to 5, characterized in that the connection unit (6, 22) has connection positions (12, 13, 14) for connecting the device to the electric motor (2).

7. Holding device according to one of claims 1 to 6, characterized in that the connection unit (6, 22) via a separate connecting line (8) to the motor terminal box (5) is connected.

8. Holding device according to one of claims 1 to 7, characterized in that the receiving element (4, 16) by means of holding elements (3) on the electric motor (2) is held.

9. Holding device according to one of claims 1 to 7, characterized in that the receiving element (4, 16) is attached by means of fastening means on a wall.

10. Holding device according to one of claims 1 to 9, characterized in that the receiving element (4, 16) consists of several optionally separately arranged parts.

11. Holding device according to one of claims 1 to 10, characterized in that the receiving element (4, 16) via pluggable connections to the motor terminal box (5, 17) is connected.

12. Holding device according to one of claims 1 to 11, characterized in that the receiving element (16) with connection unit (22), in particular by means of a terminal box adapter (19) on a motor terminal box (17) of the electric motor (2) is arranged.

13. Holding device according to one of claims 1 to 12, characterized in that the receiving element is integrated in the electric motor housing.

14. Holding device according to one of claims 1 to 13, characterized in that the receiving element (4, 16) means for verpolungssicheren plugging a device woken up.

15. Holding device according to one of claims 1 to 14, characterized in that the receiving element (4) has a connection unit (6) which is arranged on the edge of the receiving element (4) and / or whose outer contour has a tapered region.

16. Holding device according to one of claims 1 to 15, characterized in that the connection positions (11, 12, 13, 14) are arranged in the tapered region of the connection unit (6).

17. Holding device according to one of claims 1 to 16, characterized in that the housing of the device to be fastened has an interface for connection to the connection unit (6, 22) and optionally has an interface to other devices.

18. Holding device according to claim 17, characterized in that the device to be fastened on the underside of the device has a recess in the housing.

19. Holding device according to claim 17 or 18, characterized in that the device to be fastened has a connection unit for electrical connection with other devices and a receiving area for other devices.

20. Holding device according to claim 17, 18 or 19, characterized in that the device to be fastened on the upper side of the device has the same contour and the same connection positions as the receiving element (4, 16).