EP3552712A1 - Centrifugeuse - Google Patents

Centrifugeuse Download PDF

Info

Publication number: EP3552712A1
Authority: EP; European Patent Office
Prior art keywords: motor; rotor; centrifuge; bearing; shaft
Prior art date: 2018-03-15
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.): Granted

Application number

EP19160802.5A

Other languages

German (de)

English (en)

Other versions

EP3552712B1 (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.)

2018-03-15

Filing date

2019-03-05

Publication date

2019-10-16

2019-03-05 Application filed by Gebr Steimel & Co Maschinenfabrik GmbH filed Critical Gebr Steimel & Co Maschinenfabrik GmbH

2019-03-05 Priority to PL19160802T priority Critical patent/PL3552712T3/pl

2019-10-16 Publication of EP3552712A1 publication Critical patent/EP3552712A1/fr

2020-12-30 Application granted granted Critical

2020-12-30 Publication of EP3552712B1 publication Critical patent/EP3552712B1/fr

Status Active legal-status Critical Current

2039-03-05 Anticipated expiration legal-status Critical

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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.
a centrifuge In particular, it relates to an industrial centrifuge such as is used for de-oiling, drying, rinsing, coating and rust-proofing of workpieces or metal shavings.
the rotor may be formed either directly from the centrifuge drum or from a drum receiver on which the centrifuge drum is releasably secured.
Centrifuges are known in the prior art, in which the rotor is mounted directly on 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, vertically oriented.
the motor is mounted on its side facing away from the rotor in the housing of the centrifuge.
the attachment takes place in practice by a so-called Trolager.
Such centrifuges are characterized in particular by their simple structure. Examples of such centrifuges are for example the centrifuges of the type "Polar C" of the applicant.
a bearing assembly for a centrifuge which comprises a rotatable about an axis of rotation arranged centrifuge drum, here referred to as a basket.
the basket is rotatably connected via a top-closed cylindrical Laufkorbnabe with a drive shaft via a suspension of the barrel.
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 barrel hub, and the bearings for the barrel are disposed between the hub hub and the shaft tube.
the publication DE 43 14 440 C1 describes a corresponding bearing arrangement for a centrifuge.
the centrifuge drum is fixed to the motor shaft and held away from the centrifuge drum end of the stator of the motor (motor housing) in the kitlager, so that the stator of the motor (motor housing) is used as an extended bearing bridge and receives forces from the centrifuge drum.
the invention is therefore based on the object to provide a centrifuge of the type described above, which allows the use of less expensive and / or better available standard motors without costly structural changes.
centrifuge with a vertical axis of rotation, with a rotor, a motor arranged below the rotor for rotating the rotor and a predominantlylager, which carries the motor and the rotor.
the centrifuge further comprises a motor receiving device for receiving a motor, wherein the rotor is rotatably attached via a rotor bearing on the motor receiving device and wherein on the side facing away from the rotor side of the motor receiving device, the demandinglager is arranged.
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 at the upper end near the rotor to the motor mounting device.
the rotor is rotatably attached to the motor receiving device via a rotor bearing.
the foot bearing is arranged on the side facing away from the rotor and motor side of the motor mounting device, wherein the end remote from the rotor of the motor is not attached to the motor receiving device and thus not attached to the foot bearing.
the engine mount may surround the engine in a small amount of space because the engine shifts only a small amount (a few millimeters) during operation.
the space of the motor with motor mounting device is therefore insignificantly larger than the space of the motor of the prior art so that the new motor with motor receiving device without further structural changes in centrifuges according to the prior art can replace the previously used motors.
the motor shaft of the motor may in practice be rotatably coupled to the rotor. It will be transmitted via this coupling, for example, a tongue and groove connection only the torques between the motor shaft and rotor but not transverse forces or bending forces.
the motor mounting device can accommodate a motor together with its housing and its motor shaft bearing, with which the motor shaft is mounted in the housing of the motor.
the motor mounting device can closely surround the housing of the motor, so that it increases the installation space of the motor only insignificantly.
the motor may be, for example, a commercially available asynchronous motor.
the motor may in practice be fastened with its end facing the rotor to the motor mounting device.
a housing region pointing towards the rotor, for example a bearing plate is fastened to the motor mounting device.
the opposite end of the motor is not attached to the motor receiving device.
the the motherboard takes in the centrifuge according to the invention, the engine pickup device and not the engine.
a foot bearing is preferably in extension of the axis of rotation of the rotor.
the footrest can be made elastic as in the prior art.
An elastic foot bearing has the advantage that it gives the arrangement of motor receiving device, motor and rotor of the centrifuge, at a standstill or low speeds, a sufficient grip, but allowed during operation of the centrifuge small deflections due to the resulting dynamic forces.
the centrifuge can in the footwell as in the prior art according to Fig. 1 Have means for detecting imbalances. These can result, for example, from an 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 so that they emit a warning signal when exceeding a certain imbalance and / or switch off and / or stop the centrifuge. The filling of the centrifuge drum must then be changed so that the imbalances are avoided.
the rotor bearing can be a support bearing.
the support bearing can be employed.
An employee support bearing has the advantage that caused by the bracing of the bearing against each other no clearance. This is particularly advantageous against the background that acting on the rotor bearing forces should be absorbed by this before they can be passed to the motor shaft.
the rotor bearing can be realized by rolling bearings.
a rolling bearing for example, tapered roller bearings can be used. Tapered roller bearings are particularly suitable for receiving the forces acting on the rotor bearing due to the line contact between the rolling elements and bearing rings.
the rotor bearing can be arranged in an O arrangement. Bearings in O arrangement are particularly well suited to receive a force attack that takes place outside of the bearings. This is the case with a centrifuge of the type in question, for example, when the rotor is located above the rotor bearing. The imbalances that too cause the forces to be absorbed by the rotor bearing, usually arise in the region of the rotor.
the rotor may have a rotor shaft.
the rotor shaft may be mounted within the rotor bearing.
the rotor shaft may be arranged coaxially with the motor shaft. The coaxial arrangement of both shafts is particularly advantageous with regard to the stabilization of the centrifuge via the centrifugal forces of the free vertical axis of rotation.
a torsionally rigid connection between the motor shaft and rotor can be realized in a structurally simple manner.
the motor shaft and rotor shaft can be pushed into one another and secured against rotation by means of a driving element, for example a feather key.
a driving element for example a feather key.
the motor shaft is pushed into the rotor shaft.
suitable motor shafts are often provided in standard motors that can be obtained easily and inexpensively.
the engine mount surrounds the engine.
the forces which can be introduced during operation from all directions, the rotor bearing and thus in the engine recording devices, can be recorded in all directions from the motor mounting device.
a largely symmetrical construction of the motor mounting device about the axis of rotation of the motor or the axis of rotation of the centrifuge is made possible. From the symmetrical structure is also a correspondingly uniform mass distribution of the motor receiving device.
the motor receiving device may be designed cage-like and have a space that is only slightly larger than the space of the engine.
the installation space of the motor mounting device for a standard motor substantially corresponds to the installation space of the previously used special motor.
the connections, especially the connection with the NASAlager, the connections to the special motor of the previous embodiment according to Fig. 1 correspond.
the cage-like motor mounting device with the standard motor can in a simple manner of the previous special motor of the above centrifuge according to Fig. 1 replace, without further structural changes of the centrifuge are required. While maintaining the overall construction, a reliable and loadable centrifuge is thus created which manages without a special motor with a conventional standard motor because the considerable dynamic forces are absorbed by the motor mounting device.
the motor receiving device may comprise a base plate.
the base plate may be connected to the footrest, for example by a trunnion.
the motor receiving device may further comprise a top plate.
the top plate is disposed at the rotor-facing end of the motor receiving device.
the motor can be attached to the top plate. It is preferably fixed exclusively to the top plate, so that the motor housing can move freely relative to other areas of the motor mounting device. Consequently, the engine mount can easily deform due to the dynamic forces without stressing the motor housing.
the upper head plate may be designed annular in practice. The annular configuration of the top plate allows the motor shaft to pass through the top plate to connect to the rotor.
the base plate may be connected to the top plate by connecting struts. These may extend rod-shaped and / or rod-shaped with a small distance parallel to the housing of the motor. With such a construction of the base plate, top plate and connecting struts can be realized in a simple manner, a motor receiving device which surrounds the motor like a cage and takes no much greater space to complete than the engine itself.
the centrifuge may have a brake.
the brake can be arranged between the top plate of the motor mount and the rotor (centrifuge drum or drum mount). It can be a hysteresis brake.
a hysteresis brake is a brake based on the action of a magnet or electromagnet on a ferromagnetic material moving relative to the magnet or electromagnet. The repeated remagnetization of the ferromagnetic material causes an energy loss.
the brake can be designed in the manner of a drum brake. The brake drum can be attached to the rotor and the magnets on the top plate. In this way, the braking forces are introduced when braking the rotor in the motor receiving device and not via the engine itself.
a centrifuge 10 consists of a motor 16 which is held in a predominantly larger 18 and a Rotor 12 carries.
the rotor 12 is in the present case not the centrifuge drum itself but a drum holder with a holding frame 11 and a receiving plate 13, on which a centrifuge drum (not shown) can be placed.
the rotor 12 of the centrifuge 10 is mounted directly on the motor shaft 14 of the motor 16.
the bearing of the motor 16 must accommodate both the weight forces of the centrifuge drum with its filling and the dynamic forces resulting from imbalances of the rotor and its filling. These forces are introduced via the motor shaft 14 in the motor 16 and derived via the housing of the motor 16.
the housing of the motor 16 is fixed to a foot bearing 18 which carries the motor 16 with the rotor 12 attached thereto.
the motor 16 is received 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 in the Figures 2-4 shown.
the upper end of the motor 16 is secured by fastening screws 48 (see FIG. Fig. 4 ) With a top plate 40 of the motor mounting device 20 firmly screwed.
the opposite lower end of the motor 16 is not connected to the motor receiving device 20 and can move freely.
the motherboard 18 can, as in Fig. 1 shown holding a support pin 26 which is integrally formed on the base plate 36 of the motor mounting device 20.
a disk-shaped element 28 is formed, which between elastic elements 30 (s. Fig. 1 ) is fixed.
the elastic elements 30 are acted upon along the construction axis X and thus along the axis of the support pin 26 with a biasing force.
the rotor bearing 22 may, as in the in Fig. 4 shown example be executed as salaried support bearing. Tapered roller bearings in O arrangement are used as bearings. The tapered roller bearings of the rotor bearing 22 are in the Figures 3 and 4 only shown schematically.
the rotor 12 may have a rotor shaft 32, which is arranged on the underside of the rotor 12 and is mounted inside the rotor bearing 22.
the rotor shaft 32 transmits all weight forces and dynamic forces acting on the rotor 12 when rotating the rotor 12 via the rotor bearing 22 to the motor mounting device 20.
the rotor shaft 32 is in the example shown via a keyway 34 rotatably coupled to the motor shaft 14.
Motor shaft 32 and motor shaft 14 are arranged in the example shown coaxially to each other and the design axis X.
the motor mounting device 20 has a plate or plate-shaped base plate 36 have. On the base plate 36 of the support pin 26 of the preferredlagers 18 is attached.
the base plate 36 is connected via rod-shaped connecting struts 38 with a top plate 40 of the motor mounting device 20.
the top plate 40 can - as shown - be annular. 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 engine, so that the motor receiving device 20 with the motor 16 readily the motor 16 in a special design in the embodiment of Fig. 1 can replace.
the motor 16 is fixed with its housing as described above with fastening screws 48 to the top plate 40, wherein its lower end is not connected to the motor receiving device 20 and can move freely.
the brake 42 is designed as a hysteresis.
the brake 42 is shown only schematically in the example shown. It has, as a first part, an annular electromagnet 44 for generating a magnetic field which is fixed to the top plate 40 of the motor mounting device 20.
a ferromagnetic drum 46 is attached as a second part of the brake. The drum 46 surrounds the electromagnet 44.
the braking forces resulting from the deceleration of the rotor 12 are thus absorbed by the top plate 40 of the motor mount 20 and do not stress the motor 16 or its motor shaft 14.
a brake may also be used be used, which allows the return of electrical energy during the braking process in a power storage.

Landscapes

Centrifugal Separators (AREA)

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 true EP3552712A1 (fr)	2019-10-16
EP3552712B1 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)

Citations (3)

* 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
DE102013105006A1 (de) *	2012-05-22	2013-11-28	Gea Mechanical Equipment Gmbh	Antriebsvorrichtung für eine Separatoranordnung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1849525B1 (fr)	2006-04-25	2016-09-07	Ferrum AG	Agencement de palier pour une centrifugeuse

2018
- 2018-03-15 DE DE102018106079.3A patent/DE102018106079B3/de not_active Expired - Fee Related
2019
- 2019-03-05 EP EP19160802.5A patent/EP3552712B1/fr active Active
- 2019-03-05 PL PL19160802T patent/PL3552712T3/pl unknown
- 2019-03-05 HU HUE19160802A patent/HUE054097T2/hu unknown

Patent Citations (3)

* 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
DE102013105006A1 (de) *	2012-05-22	2013-11-28	Gea Mechanical Equipment Gmbh	Antriebsvorrichtung für eine Separatoranordnung

Also Published As

Publication number	Publication date
PL3552712T3 (pl)	2021-06-28
HUE054097T2 (hu)	2021-08-30
EP3552712B1 (fr)	2020-12-30
DE102018106079B3 (de)	2019-07-04

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