EP3552712B1 - Centrifugeuse - Google Patents

Centrifugeuse Download PDF

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Publication number
EP3552712B1
EP3552712B1 EP19160802.5A EP19160802A EP3552712B1 EP 3552712 B1 EP3552712 B1 EP 3552712B1 EP 19160802 A EP19160802 A EP 19160802A EP 3552712 B1 EP3552712 B1 EP 3552712B1
Authority
EP
European Patent Office
Prior art keywords
motor
rotor
centrifuge
bearing
mounting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19160802.5A
Other languages
German (de)
English (en)
Other versions
EP3552712A1 (fr
Inventor
Christian Haas
Daniel Schrameyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Steimel & Co Maschinenfabrik GmbH
Original Assignee
Gebr Steimel & Co Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebr Steimel & Co Maschinenfabrik GmbH filed Critical Gebr Steimel & Co Maschinenfabrik GmbH
Priority to PL19160802T priority Critical patent/PL3552712T3/pl
Publication of EP3552712A1 publication Critical patent/EP3552712A1/fr
Application granted granted Critical
Publication of EP3552712B1 publication Critical patent/EP3552712B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/02—Electric motor drives
    • B04B9/04—Direct drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings

Definitions

  • the invention relates to a centrifuge. It relates in particular to an industrial centrifuge such as is used, for example, for de-oiling, drying, rinsing, coating and rust protection of workpieces or metal chips
  • Such a centrifuge according to the preamble of claim 1 is of DE102013105006 known.
  • the rotor can either be formed directly by the centrifuge drum or by a drum holder on which the centrifuge drum is detachably attached.
  • centrifuges are known in which the rotor is attached directly to the shaft of a motor, usually an electric motor.
  • the shaft of the motor - and thus the axis of rotation of the rotor - is, at least essentially, oriented vertically.
  • the motor is fastened on its side facing away from the rotor in the housing of the centrifuge. In practice, it is fastened using a so-called foot bearing.
  • Such centrifuges are particularly distinguished by their simple structure. Examples of such centrifuges are, for example, the applicant's “Polar C” centrifuges.
  • a bearing arrangement for a centrifuge which comprises a centrifuge drum which is arranged rotatably about an axis of rotation, here referred to as a basket.
  • the basket is connected to a drive shaft via a suspension of the basket via a cylindrical basket hub closed at the top.
  • the drive shaft extends along the axis of rotation in a bearing block and is coupled to a drive unit.
  • a shaft tube is arranged around the drive shaft and within the cage hub and the bearings for the cage are arranged between the cage hub and the shaft tube.
  • the pamphlet DE 43 14 440 C1 describes a corresponding bearing arrangement for a centrifuge.
  • the centrifuge drum is attached to the motor shaft and the end of the stator of the motor (motor housing) facing away from the centrifuge drum is held in the foot bearing so that the stator of the motor (motor housing) is used as an extended bearing bridge and absorbs forces from the centrifuge drum.
  • the invention is therefore based on the object of providing a centrifuge of the type described above which allows the use of more cost-effective and / or better available standard motors without complex structural changes.
  • a centrifuge with a vertical axis of rotation is described, with a rotor, a motor arranged below the rotor for rotating the rotor and a foot bearing which supports the motor and the rotor.
  • the centrifuge further comprises a motor receiving device for receiving a motor, the rotor being rotatably fastened to the motor receiving device via a rotor bearing and wherein the foot bearing is arranged on the side of the motor receiving device facing away from the rotor.
  • the centrifuge according to the invention has a motor receiving device for receiving the motor to which the motor is attached.
  • the motor housing is screwed tightly to the motor mounting device at the upper end near the rotor.
  • the rotor is rotatably attached to the motor mounting device via a rotor bearing.
  • the dynamic forces of the rotor are at least partially absorbed by the motor receiving device via this fastening and do not act on the motor or its shaft.
  • the foot bearing is arranged on the side of the motor receiving device facing away from the rotor, the end of the motor facing away from the rotor not being attached to the motor receiving device and thus not being attached to the foot bearing.
  • the forces involved in the in Fig. 1 The centrifuge shown according to the prior art act on the bearing of the motor shaft, can thus be received by the rotor bearing on the motor receiving device and introduced into the motor receiving device. These forces are transmitted via the motor mounting device to the foot bearing at the lower end of the motor mounting device. The lower end of the motor is freely received in the motor receiving device, so that it can move freely when the rotor moves. In this way, the motor shaft and the bearing of the motor shaft in the motor are considerably relieved. It is therefore possible to use expensive special motors that can only be ordered with long delivery times and whose motor shaft and bearings are suitable for absorbing large forces dispense with installing common standardized electric motors in the centrifuge.
  • the motor mounting device can surround the motor with little installation space because the motor is only displaced by a small amount (a few millimeters) during operation.
  • the installation space of the motor with motor mounting device is therefore insignificantly larger than the installation space of the motor of the prior art so that the new motor with motor mounting device can replace the motors previously used in centrifuges according to the prior art without any further structural changes.
  • the motor shaft of the motor can be coupled non-rotatably to the rotor.
  • This coupling for example a tongue and groove connection, only transmits the torques between the motor shaft and rotor, but not transverse forces or bending forces.
  • the motor receiving device can accommodate a motor together with its housing and its motor shaft bearing with which the motor shaft is supported in the housing of the motor.
  • the motor mounting device can closely surround the housing of the motor so that it only insignificantly increases the installation space of the motor.
  • the motor can, for example, be a commercially available asynchronous motor.
  • the motor can be fastened to the motor receiving device with its end pointing towards the rotor.
  • a housing area pointing towards the rotor for example a bearing plate, is attached to the motor receiving device.
  • the opposite end of the motor is not attached to the motor mount. Deformations due to transverse forces or bending moments are thus absorbed solely by the motor receiving device and not by the motor housing.
  • the foot bearing accommodates the motor mounting device and not the motor.
  • a foot bearing is preferably located in the extension of the axis of rotation of the rotor.
  • the foot bearing can be designed to be elastic, as in the prior art.
  • An elastic foot bearing has the advantage that it gives the arrangement of the motor mounting device, motor and rotor of the centrifuge adequate support when the centrifuge is at a standstill or at low speeds, but allows small deflections during operation of the centrifuge due to the resulting dynamic forces.
  • the centrifuge can in the area of the foot bearing as in the prior art Fig. 1 Have means for detecting imbalances. This can result, for example, from irregular filling of the rotor. If the imbalances exceed a certain level, this can lead to problems.
  • the means for detecting imbalances can therefore be set up in such a way that when a certain imbalance is exceeded, they emit a warning signal and / or switch off and / or stop the centrifuge. The filling of the centrifuge drum must then be changed in such a way that the imbalances are avoided.
  • the rotor bearing can be a support bearing.
  • the support bearing can be employed.
  • An employed support bearing has the advantage that the bracing of the bearings against each other does not result in bearing play. This is particularly advantageous against the background that forces acting on the rotor bearing should be absorbed by the latter before they can be passed on to the motor shaft.
  • the rotor bearing can be implemented using roller bearings.
  • Tapered roller bearings for example, can be used as roller bearings. Due to the line contact between the rolling elements and the bearing rings, tapered roller bearings are particularly suitable for absorbing the forces acting on the rotor bearing.
  • the rotor bearing can be arranged in an O arrangement. Bearings in an O-arrangement are particularly suitable for absorbing a force that occurs outside the bearing points. In the case of a centrifuge of the type in question, this is the case, for example, when the rotor is located above the rotor bearing. The imbalances that too the forces to be absorbed by the rotor bearing usually arise in the area of the rotor.
  • the rotor can have a rotor shaft.
  • the rotor shaft can be mounted within the rotor bearing.
  • the rotor shaft can be arranged coaxially to the motor shaft. The coaxial arrangement of the two shafts is particularly advantageous with regard to the stabilization of the centrifuge via the gyroscopic forces of the free vertical axis of rotation.
  • the rotor has a rotor shaft, for example a torsionally rigid connection between the motor shaft and rotor can be implemented in a structurally simple manner.
  • the motor shaft and rotor shaft can be pushed into one another and secured against rotation by a driver element, for example a feather key.
  • the motor shaft is preferably pushed into the rotor shaft.
  • Motor shafts suitable for this are often provided in standard motors that can be obtained easily and inexpensively.
  • the motor receiving device advantageously surrounds the motor. In this way it can be achieved that the forces which can be introduced into the rotor bearing and thus into the motor receiving devices during operation from all directions can also be absorbed in all directions by the motor receiving device.
  • a largely symmetrical structure of the motor receiving device around the axis of rotation of the motor or the axis of rotation of the centrifuge is made possible.
  • the symmetrical structure also results in a correspondingly uniform mass distribution of the motor mounting device.
  • the motor receiving device can be designed in the manner of a cage and have an installation space that is only slightly larger than the installation space of the motor.
  • the installation space of the motor mounting device for a standard motor essentially corresponds to the installation space of the previously used special motor.
  • the connections, especially the connection with the Foot bearings, the connections to the special motor of the previous embodiment can according to Fig. 1 correspond.
  • the cage-like motor mounting device with the standard motor can easily be adapted to the previous special motor of the centrifuge mentioned above Fig. 1 without requiring any further structural changes to the centrifuge. While maintaining the overall construction, a reliable and resilient centrifuge is created that does not require a special motor with a conventional standard motor because the considerable dynamic forces are absorbed by the motor mounting device.
  • the motor receiving device can have a base plate.
  • the base plate can be connected to the footrest, for example by a support pin.
  • the motor receiving device can also have a head plate.
  • the head plate is arranged on the end of the motor receiving device facing the rotor.
  • the motor can be attached to the head plate. It is preferably attached exclusively to the top plate, so that the motor housing can move freely relative to other areas of the motor receiving device. As a result, the motor receiving device can easily deform due to the dynamic forces without the motor housing being stressed.
  • the upper head plate can in practice be designed in a ring shape. The ring-shaped design of the head plate allows the motor shaft to be guided through the head plate in order to connect it to the rotor.
  • the base plate can be connected to the top plate by connecting struts. These can extend rod-shaped and / or rod-shaped with a small distance parallel to the housing of the motor. With a construction of this type made up of a base plate, head plate and connecting struts, a motor mounting device can be implemented in a simple manner, which surrounds the motor in a cage-like manner and does not take up any significantly larger installation space than the motor itself.
  • the centrifuge can also have a brake.
  • the brake can be arranged between the top plate of the motor mounting device and the rotor (centrifuge drum or drum mounting). It can be a hysteresis brake.
  • a hysteresis brake is a brake that is based on the action of a magnet or electromagnet on a ferromagnetic material moving relative to the magnet or electromagnet. The repeated magnetization of the ferromagnetic material results in a loss of energy.
  • the brake can be designed in the manner of a drum brake.
  • the brake drum can be attached to the rotor and the magnets to the head plate. In this way, the braking forces when braking the rotor are also introduced into the motor receiving device and not via the motor itself.
  • a centrifuge 10 consists of a motor 16 which is held in a foot bearing 18 and a Rotor 12 carries.
  • the rotor 12 is not the centrifuge drum itself, but rather a drum holder with a holding frame 11 and a mounting plate 13 on which a centrifuge drum (not shown) can be set up.
  • the rotor 12 of the centrifuge 10 is attached directly to the motor shaft 14 of the motor 16.
  • the mounting of the motor 16 has to absorb both the weight forces of the centrifuge drum with its filling and the dynamic forces that result from imbalances in the rotor and its filling. These forces are introduced into the motor 16 via the motor shaft 14 and diverted via the housing of the motor 16.
  • the housing of the motor 16 is fastened to a foot bearing 18 which carries the motor 16 with the rotor 12 fastened to it.
  • the motor 16 is accommodated in a motor receiving device 20.
  • the rotor 12 is rotatably connected to the motor receiving device 20 at its upper end via a rotor bearing 22.
  • a corresponding exemplary arrangement of motor receiving device 20, motor 16 and rotor 12 is shown in FIG Figures 2-4 shown.
  • the upper end of the motor 16 is secured by fastening screws 48 (see Fig. Fig. 4 ) firmly screwed to a head plate 40 of the motor mounting device 20.
  • the opposite lower end of the motor 16 is not connected to the motor mounting device 20 and can move freely.
  • the foot bearing 18 fastened to the motor mounting device 20 can be used in the case of the Figures 2-4 arrangement shown in accordance with the in Fig. 1 be formed prior art shown. The same applies to the outer housing 24 of the centrifuge 10 and the others in the Figures 2 to 4 components not shown. As a result, the new motor mounting device 20 with a standard motor can be installed in an existing centrifuge without any problems.
  • the foot bearing 18 can, as in Fig. 1 shown, hold a support pin 26 which is formed on the base plate 36 of the motor receiving device 20.
  • a disk-shaped element 28 is formed on the support pin 26, which is sandwiched between elastic elements 30 (see FIG. Fig. 1 ) is fixed.
  • the elastic elements 30 are subjected to a prestressing force along the construction axis X and thus along the axis of the support pin 26.
  • the rotor bearing 22 can as in the in Fig. 4 shown example be designed as an employed support bearing. Tapered roller bearings in an O arrangement are used as bearings. The tapered roller bearings of the rotor bearing 22 are in the Figures 3 and 4th shown only schematically.
  • the rotor 12 can have a rotor shaft 32 which is arranged on the underside of the rotor 12 and is mounted within the rotor bearing 22.
  • the rotor shaft 32 transmits all of the weight forces and dynamic forces acting on the rotor 12 when the rotor 12 rotates via the rotor bearing 22 to the motor mounting device 20.
  • the rotor shaft 32 is rotatably coupled to the motor shaft 14 via a feather key connection 34.
  • motor shaft 32 and motor shaft 14 are arranged coaxially to one another and to the construction axis X.
  • the motor mounting device 20 has a plate-shaped or plate-shaped base plate 36.
  • the support pin 26 of the foot bearing 18 is attached to the base plate 36.
  • the base plate 36 is connected to a head plate 40 of the motor mounting device 20 via rod-shaped connecting struts 38.
  • the head plate 40 can — as shown — be of annular design. Head plate 40, base plate 36 and connecting struts 38 thus form the motor receiving device 20, which surrounds the motor 16 like a cage.
  • the entire installation space of the motor mounting device 20 essentially corresponds to the installation space of the motor, so that the motor receiving device 20 with the motor 16 can easily connect the motor 16 in a special design in the embodiment of FIG Fig 1 can replace.
  • the motor 16 is fastened with its housing to the head plate 40 with fastening screws 48 as described above, its lower end not being connected to the motor receiving device 20 and being able to move freely.
  • a brake 42 is arranged between the rotor 12 and the motor receiving device 20.
  • the brake 42 is designed as a hysteresis brake.
  • the brake 42 is shown only schematically in the example shown. As a first part it has an annular electromagnet 44 for generating a magnetic field, which is fastened to the head plate 40 of the motor mounting device 20.
  • a ferromagnetic drum 46 is attached to the mounting plate 13 of the rotor 12 as the second part of the brake. The drum 46 surrounds the electromagnet 44.
  • the braking forces generated by the braking of the rotor 12 are absorbed in this way via the head plate 40 of the motor mounting device 20 and do not load the motor 16 or its motor shaft 14.
  • a brake can also be used can be used, which enables electrical energy to be fed back into a power storage unit during the braking process.

Landscapes

  • Centrifugal Separators (AREA)

Claims (10)

  1. Centrifugeuse (10) à axe de rotation vertical, avec un rotor (12), un moteur (16) agencé sous le rotor (12) et permettant de faire tourner le rotor (12), et une suspension inférieur (18) qui supporte le moteur (16) et le rotor (12),
    avec un dispositif d'accueil de moteur (20) permettant d'accueillir un moteur (16), dans laquelle le rotor (12) est fixé rotatif au dispositif d'accueil de moteur (20) par l'intermédiaire d'un palier de rotor (22), caractérisée en ce que la suspension inférieur (18) est agencé sur le côté du dispositif d'accueil de moteur (20) qui se détourne du rotor (12) et l'extrémité du moteur (16) qui se détourne du rotor (12) n'est pas fixée au dispositif d'accueil de moteur (20).
  2. Centrifugeuse (10) selon la revendication 1,
    caractérisée en ce que,
    un arbre de moteur (14) du moteur (16) est couplé en rotation au rotor (12).
  3. Centrifugeuse (10) selon la revendication 1 ou 2,
    caractérisée en ce que,
    le palier de rotor (22) est un roulement d'appuie à contact oblique.
  4. Centrifugeuse (10) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que,
    le rotor (12) présente un arbre de rotor (32) monté à l'intérieur du palier de rotor (22).
  5. Centrifugeuse (10) selon la revendication 4,
    caractérisée en ce que,
    l'arbre de rotor (32) et l'arbre de moteur (14) sont agencés de manière coaxiale.
  6. Centrifugeuse (10) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que,
    le dispositif d'accueil de moteur (20) entoure le moteur (16).
  7. Centrifugeuse (10) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que,
    le moteur (16) est fixé au dispositif d'accueil de moteur (20) grâce à son extrémité tournée vers le rotor (12).
  8. Centrifugeuse (10) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que,
    le dispositif d'accueil de moteur (20) présente les éléments ci-dessous :
    • une plaque de base (36) ;
    • une plaque supérieure (40) ;
    • plusieurs entretoises de liaison (38) qui s'étendent en direction de l'arbre de moteur (14) et dont les extrémités sont fixées à la plaque de base (36) d'une part et à la plaque supérieure (40) d'autre part.
  9. Centrifugeuse (10) selon la revendication 8,
    caractérisée en ce que,
    un tourillon d'appui (26) retenu dans la suspension inférieur (18) est agencé au niveau de la plaque de base (36).
  10. Centrifugeuse (10) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que,
    un frein (42), en particulier un frein à hystérésis, est agencé entre le dispositif d'accueil de moteur (20) et le rotor (12), dans laquelle éventuellement une partie (44) du frein est fixée au niveau de la plaque supérieure (40) du dispositif d'accueil de moteur (20) et une partie (46) du frein est fixée au niveau du rotor (12).
EP19160802.5A 2018-03-15 2019-03-05 Centrifugeuse Active EP3552712B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19160802T PL3552712T3 (pl) 2018-03-15 2019-03-05 Wirówka

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018106079.3A DE102018106079B3 (de) 2018-03-15 2018-03-15 Zentrifuge

Publications (2)

Publication Number Publication Date
EP3552712A1 EP3552712A1 (fr) 2019-10-16
EP3552712B1 true EP3552712B1 (fr) 2020-12-30

Family

ID=65717787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19160802.5A Active EP3552712B1 (fr) 2018-03-15 2019-03-05 Centrifugeuse

Country Status (4)

Country Link
EP (1) EP3552712B1 (fr)
DE (1) DE102018106079B3 (fr)
HU (1) HUE054097T2 (fr)
PL (1) PL3552712T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314440C1 (de) 1993-05-03 1994-06-16 Kyffhaeuser Maschf Artern Gmbh Zentrifugalseparator mit Schwerstanlauf
DE102006011895A1 (de) * 2006-03-15 2007-09-20 Westfalia Separator Ag Separatoranordnung in sanitärer Ausführung
EP1849525B1 (fr) 2006-04-25 2016-09-07 Ferrum AG Agencement de palier pour une centrifugeuse
AU2013265479B2 (en) * 2012-05-22 2017-12-14 Gea Mechanical Equipment Gmbh Drive apparatus for a separator arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3552712A1 (fr) 2019-10-16
HUE054097T2 (hu) 2021-08-30
PL3552712T3 (pl) 2021-06-28
DE102018106079B3 (de) 2019-07-04

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