EP3636811A9 - Open-end spinning device and method for checking a mounting condition of a spinning rotor of an open-end spinning device - Google Patents
Open-end spinning device and method for checking a mounting condition of a spinning rotor of an open-end spinning device Download PDFInfo
- Publication number
- EP3636811A9 EP3636811A9 EP19202310.9A EP19202310A EP3636811A9 EP 3636811 A9 EP3636811 A9 EP 3636811A9 EP 19202310 A EP19202310 A EP 19202310A EP 3636811 A9 EP3636811 A9 EP 3636811A9
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- European Patent Office
- Prior art keywords
- axial
- rotor
- spinning
- bearing
- spinning rotor
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- 238000009987 spinning Methods 0.000 title claims abstract description 169
- 238000007383 open-end spinning Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 101150038956 cup-4 gene Proteins 0.000 description 9
- 238000013461 design Methods 0.000 description 8
- 230000004323 axial length Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
- D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
- D01H4/12—Rotor bearings; Arrangements for driving or stopping
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/42—Control of driving or stopping
- D01H4/44—Control of driving or stopping in rotor spinning
Definitions
- the present invention relates to a method for checking an assembly state of a spinning rotor, which comprises a rotor shaft with a shoulder and a rotor cup detachably connected to the rotor shaft.
- the spinning rotor is mounted in a magnetic bearing in an open-end spinning device that can be closed with a cover element on the front.
- the magnetic bearing has means for adjusting an axial position of the rotor shaft, means for detecting the axial position and at least one front axial catch bearing for the shoulder of the rotor shaft.
- Spinning rotors of today's open-end spinning machines are often stored in magnetic bearings due to the high speeds of well over 100,000 rpm. These are advantageous compared to purely mechanical bearings at very high speeds because they have only low friction losses and are hardly susceptible to wear. They can be designed as passive bearings with permanent magnets as well as active bearings with controlled electromagnets. Non-contact storage in the radial and axial directions is not possible with passive bearings. If passive magnetic bearings are used in open-end spinning devices, they are generally used for radial bearings. So that the spinning rotor maintains a predetermined operating position in the axial direction, passive magnetic bearings are provided with an additional position control for the axial position.
- both the radial position and the axial position of the spinning rotor are permanently recorded and controlled accordingly.
- Both the position control for passive magnetic bearings and the actively controlled magnetic bearings are dependent on a constant power supply. In order to avoid damage to the magnetic bearings in the event of malfunctions, therefore mechanical catch bearing provided.
- the present invention deals with both types of magnetic bearings.
- An open-end spinning device with a passive magnetic bearing and a position control for the axial position (central position control) is for example from the DE 10 2006 030 187 A1 known.
- Such magnetic bearings each contain a front and a rear position with magnetic devices, ie either permanent magnets, actively controllable electromagnets or a combination of the two.
- a part of these magnetic devices is fixed on the rotating rotor shaft of the spinning rotor and interacts with fixed magnetic devices which are fixed on the bearing housing of the spinning rotor.
- the assembly and removal of such a spinning rotor is therefore associated with considerable effort.
- it is therefore detachably connected to the rotor shaft by means of a coupling device.
- a spinning rotor with a coupling device is from the EP 2 832 903 B1 known.
- the coupling device is designed as a plug-in coupling, in which the rotor cup can be inserted into or plugged onto the rotor shaft.
- plug-in couplings of this type the rotor cup may not be pushed onto the rotor shaft or inserted into the rotor shaft far enough, and the coupling length may be too short.
- the running behavior of the spinning rotor and also the spinning results are impaired by such incorrect assembly.
- a correct assembly state of the spinning rotor ie the correct axial position of the rotor cup with respect to the rotor shaft, is also essential from a safety point of view because the rotor cup could become detached from the rotor shaft during operation.
- the object of the present invention is therefore to propose a method for checking the assembly state of a spinning rotor. Furthermore, a corresponding open-end spinning device is to be proposed.
- the spinning rotor is mounted in a magnetic bearing in an open-end spinning device that can be closed with a cover element on the front.
- the spinning rotor has a rotor shaft with a shoulder and a rotor cup detachably connected to the rotor shaft.
- the magnetic bearing includes means for adjusting an axial position of the rotor shaft, means for detecting the axial position and at least one front catch bearing for the shoulder of the rotor shaft.
- a first distance between the shoulder of the rotor shaft and the front catch bearing is defined for a regular axial operating position of the spinning rotor.
- the spinning rotor is moved axially in the direction of the front catch bearing until it reaches an axial stop.
- a first travel path of the spinning rotor between the regular axial operating position and the axial stop is recorded and compared with the first distance.
- the spinning rotor is started when the first travel path is equal to the previously defined first distance.
- the spinning rotor is prevented from starting if the determined travel path is smaller than the previously defined first distance.
- a corresponding open-end spinning device which can be closed at the front with a cover element, has a control device which is designed to carry out the method.
- the invention is based on the idea that the spinning rotor accommodated in its regular axial operating position in the magnetic bearing can only be moved against the front catching bearing by the full travel distance, i.e. the first distance between the shoulder of the rotor shaft and the front catching bearing, if it has a correct installation condition.
- the spinning rotor since the rotor cup is in its correct axial position in relation to the rotor shaft, the spinning rotor can be moved from its regular axial operating position in the direction of the front axial catch bearing until it strikes it.
- the axial stop which limits the travel of the spinning rotor, is thus formed in this case by the front axial catch bearing.
- the travel of the spinning rotor or the rotor shaft therefore corresponds exactly to the previously defined distance between the shoulder of the rotor shaft and the front catch bearing.
- the spinning rotor has a faulty assembly state, i. H. If the rotor cup is not completely pushed onto or inserted into the rotor shaft, the spinning rotor has a greater axial length. If this spinning rotor is now moved in the direction of the front axial catching bearing, the spinning rotor strikes the cover element of the open-end spinning device due to the greater length with the edge of the rotor cup before the shoulder of the rotor shaft has reached the front axial catching bearing. In this case, the axial stop that limits the travel of the spinning rotor is not formed by the axial catch bearing, but by the cover element. The travel distance between the regular operating position and the axial stop is therefore shorter than the first distance between the regular operating position and the front axial catch bearing.
- the entire method can be carried out automatically with the aid of components which are in any case part of the magnetic bearing or the open-end spinning device. Since no additional components are required, the method and the open-end spinning device can also be carried out correspondingly inexpensively. It is also particularly advantageous that the method can be carried out completely automatically. This advantageously prevents the start of an incorrectly installed spinning rotor, which also ensures the safety of the operating personnel.
- the cover element of the open-end spinning device is first closed and the spinning rotor is moved into its regular axial operating position. Only then is the spinning rotor moved in the direction of the front axial catch bearing until it reaches the axial stop.
- This means that the magnetic bearing is activated after the open-end spinning device is closed and the spinning rotor is brought into its regular axial operating position. From this he is then moved with the means for adjusting the axial position of the rotor shaft in the direction of the front axial catch bearing until he reaches the axial stop.
- the spinning rotor is first moved in the direction of the front catch bearing until it reaches the axial stop, and only then is the cover element of the open-end spinning device closed and the spinning rotor is moved into the regular axial operating position.
- the magnetic bearing is activated before the open-end spinning device closes and the spinning rotor is moved up to the axial stop. Then becomes the open end spinning device closed with the cover element, the entire spinning rotor is displaced backwards in the axial direction by the cover element.
- the cover element forms the axial stop; if the spinning rotor is correctly installed, however, the front axial catch bearing forms the axial stop. If the spinning rotor is now moved from the axial stop into its regular axial operating position after the open-end spinning device has been closed, the assembly state of the spinning rotor can in turn be inferred from the travel path.
- the spinning rotor before the spinning rotor is started, the spinning rotor is additionally moved in the direction of a rear axial catch bearing until it strikes the rear axial catch bearing with a rear bearing surface.
- the magnetic bearing has a rear axial catch bearing and the rotor shaft has a rear bearing surface for striking the rear catch bearing.
- Further information regarding the operational readiness of the open-end spinning device can be obtained from the travel path between the rear axial catch bearing and a reference point, for example the regular axial operating position or the front axial catch bearing. For example, contamination or damage in the bearing can be concluded from this.
- a second distance between the rear bearing surface of the rotor shaft and the rear catch bearing is defined for the regular axial operating position of the spinning rotor and the spinning rotor is moved between the regular axial operating position and the rear catch bearing.
- a second travel path of the spinning rotor is recorded.
- the detected second travel path is then compared with the second distance between the regular axial operating position and the rear catch bearing. From a deviation of the determined second travel distance from the defined second distance, damage and / or contamination of the rear axial catch bearing can be concluded.
- the open-end spinning device has an output device which can be controlled by the control device in the event of such a deviation. In this way, the operating personnel can quickly see that and possibly also why the open-end spinning device in question has not been put into operation.
- the determination of the first travel path and / or the determination of the second travel path is carried out before each start of the spinning rotor.
- errors which have occurred after the successful initial start-up can also be reliably detected.
- the spinning rotor is no longer checked again after a stop due to a normal, automatic maintenance process.
- Such normal maintenance processes are, for example, piecing after a thread break or a cleaner cut, after cleaning the rotor or even changing the bobbin.
- the determination of the first travel path and / or the second travel path could, for example, also be carried out in rotation after a certain number of maintenance processes in each case, or could even be limited to the initial start-up after a lot change.
- the coupling device of the spinning rotor comprises a locking device. At least the unintentional loosening of the coupling device after the correct assembly of the spinning rotor, for example during operation, can thereby be avoided.
- the locking device has a catch area which, when the spinning rotor is assembled, has a correct assembly state of the spinning rotor. This means that the spinning rotor automatically slips into the correct assembly state as soon as the catching area of the coupling device is reached when the rotor cup is mounted on the rotor shaft. This makes it possible to avoid faulty assemblies with only slight deviations from the correct assembly state. In comparison to those with large deviations, such faulty assemblies can often neither be visually detected by the operating personnel, nor can they be recognized by means of the described method after being inserted into the spinning device. The safety of the open-end spinning device can thereby be increased further.
- Such a locking device with a catch area can be implemented, for example, with an axial clip.
- the spinning rotor has a minimal gap to the cover element when the shoulder rests against the front catch bearing and when the assembly is correct, and the catch range of the locking device is larger than the minimum gap.
- the safety of the open-end spinning device can hereby be guaranteed for all faulty assembly states of the spinning rotor, since larger assembly errors can be recognized by means of the described method and smaller assembly errors can be avoided by the locking device with the catch area.
- FIG. 1 shows an open-end spinning device 1 in a schematic, sectional overview.
- the open-end spinning device 1 can be closed at the front with a cover element 7.
- the spinning rotor 2 is formed in two parts with a rotor cup 4 and a rotor shaft 3, which are connected by a coupling device 14.
- the spinning rotor 2 can be rotated and held by means of a drive 18.
- the magnetic bearing 6 conventionally includes a front radial bearing 6a, a rear radial bearing 6b and, in the present case, a separate axial bearing 6c.
- the open-end spinning device 1 further includes a control device 15, by means of which the magnetic bearing 6 can be operated and with which, depending on the design the magnetic bearing 6, at least some of the components of the magnetic bearing 6 are in a tax-related connection (dotted lines).
- a control device 15 by means of which the magnetic bearing 6 can be operated and with which, depending on the design the magnetic bearing 6, at least some of the components of the magnetic bearing 6 are in a tax-related connection (dotted lines).
- the various designs of such magnetic bearings 6 and their structure are well known and are therefore not explained in detail.
- the open-end spinning device 1 shown here has an output device 16 for outputting a signal, which is likewise in control connection (dotted line) with the control device 15.
- the magnetic bearing 6 has means 8 for adjusting the axial position of the spinning rotor 2 or the rotor shaft 3 and means 9 for detecting the axial position. In the present case, these are arranged in the region of a rear end of the spinning rotor 2, but a different arrangement would also be conceivable, depending on the design of the magnetic bearing 6.
- the means 9 for detecting the axial position of the spinning rotor 2 include a sensor coil, which reports the detected axial position of the control device 15, and the means 8 for adjusting the axial position include a magnetic coil which can be controlled by the control device 15.
- the means 8 for adjusting the axial position can also include one or more regulated electromagnets of an active magnetic bearing 6 and the means 9 for detecting the axial position can comprise a plurality of position sensors. It is also possible for the means 9 to be designed to detect the absolute position of the spinning rotor 2 in the magnetic bearing 6. To carry out the method, however, it is sufficient if the means 9 are only designed to detect a change in position of the spinning rotor 2 in the axial direction. The actual position of the spinning rotor 2 can nevertheless be inferred from the detected change in position and the control data of the means 8 for setting the axial position.
- the open-end spinning device 1 has, in a manner known per se, a front axial catch bearing 10 and a rear axial catch bearing 12, which meet the rotating and the stationary parts prevent the magnetic bearing 6 in the event of a power failure or if vibrations occur.
- the spinning rotor 2 accordingly has a shoulder 5 which interacts with the front axial catch bearing 10.
- the spinning rotor 2 has a rear bearing surface 13, which in the present case is formed by the rear end of the rotor shaft 3.
- the spinning rotor 2 In its regular axial operating position 11 (see Figures 2-5 ) the spinning rotor 2 is usually in a central position between the two catch bearings 10, 12, which is held by the means 9 for detecting the axial position and the means 8 for adjusting the axial position.
- a first embodiment of the method for checking an assembly state of a spinning rotor 2 will now be described with reference to FIG Figures 2a, 2b , 3a and 3b explained.
- the cover element 7 of the open-end spinning device 1 is first closed and only then is the spinning rotor 2 moved in the direction of the front axial catch bearing 10.
- the spinning rotor 2 is shown in its regular axial operating position 11, in which the shoulder 5 of the rotor shaft 3 is at a first distance s0 from the front axial catch bearing 10. Likewise, the rear bearing surface 13 has a second distance h0 from the rear axial catch bearing 12.
- the spinning rotor 2 is shown here in a correct assembly state, in which the rotor cup 4 is completely attached to the rotor shaft 3. If the spinning rotor 2 is in a correct assembly state and in its regular axial operating position 11, then it has a regular gap dimension k0 to the cover element 7 of the open-end spinning device 1, as shown here.
- the cover element 7 can contain a channel plate or a channel plate adapter that can be inserted into such a channel plate.
- the magnetic bearing 6 is now activated and the spinning rotor 2 is made to float. Furthermore, the spinning rotor 2 or the rotor shaft 3 by the means 8 for adjusting the Axial position of the rotor shaft 3 moves in the direction of the front axial catch bearing 10 until it reaches an axial stop.
- Figure 2b shows the spinning rotor 2 after it has been moved in the direction of the front catch bearing 10 and has reached the axial stop.
- the first travel path s covered by the spinning rotor 2 was detected or determined by the means 9 for detecting the axial position of the rotor shaft 3. Since the spinning rotor 2 is in a correct assembly state, the shoulder 5 of the rotor shaft 3 can be moved against the axial catch bearing 10 as far as it will go. The spinning rotor 2 still has a minimum gap dimension km to the cover element 7 even after striking. The axial stop is thus formed by the front axial catch bearing 10 when the spinning rotor 2 is correctly mounted.
- the control device 15 see Figure 1
- the first travel path s is now compared with the first distance s0.
- the determined first travel path s corresponds to the first distance s0 which the shoulder 5 has in the regular axial operating position 11 of the spinning rotor 2 from the front axial catch bearing 10 .
- the open-end spinning device 1 can thus be put into operation and the spinning rotor 2 can be started.
- FIG 3a shows a spinning rotor 2 in a faulty assembly state, in which the rotor cup 4 is not completely pushed onto the rotor shaft 3 or the coupling device 14 is not completely closed.
- the spinning rotor 2 is also shown in its regular axial operating position 11, in which the shoulder 5 is at the first distance s0 from the front axial catch bearing 10.
- the gap dimension k between the spinning rotor 2, more precisely between the open edge of the rotor cup 4 of the spinning rotor 2, and the cover element 7 is, however, reduced compared to the regular gap dimension k0, since the spinning rotor 2 has a greater axial length due to the faulty assembly state.
- a second embodiment of the method is based on the Figures 4a, 4b and 4c described.
- the magnetic bearing 6 is first activated and the spinning rotor 2 is moved in the direction of the front axial catch bearing 10 and only then is the cover element 7 closed.
- FIG 4a shows the open-end spinning device 1 with the cover element 7 still open, the spinning rotor 2 having already been driven against the front axial catch bearing 10 and striking it.
- the axial stop is thus formed by the front axial catch bearing 10 in this method.
- the spinning rotor 2 is shown here in a faulty assembly state in which it has a greater axial length.
- the spinning rotor 2, more precisely the shoulder 5 of the spinning rotor 2 again has the first distance s0 from the regular axial operating position 11, which is symbolized here only by a line.
- the cover element 7 closed it contacts the incorrectly mounted spinning rotor and pushes it back in the direction of its regular axial operating position 11, as shown by the two-dot chain lines.
- the spinning rotor 2 is transferred from the shifted position (solid lines) into its regular axial operating position 11 (dashed lines) after the cover element 7 has been closed.
- the first travel path s covered is in turn recorded and compared with the predetermined first distance s0. Since the spinning rotor 2 has already been displaced by the cover element 7 due to the faulty assembly state, the first travel path s in the present example is, however, smaller than the first distance s0 or possibly even negative, namely when the spinning rotor 2 is above its regular axial operating position 11 was also moved in the direction of the rear axial catch bearing 12. From the too small travel s, it can in turn be concluded that the spinning rotor 2 is in an incorrect assembly state.
- Figure 4c shows the method after the second embodiment with the spinning rotor 2 correctly installed Figure 4a described, the spinning rotor 2 is moved to the front axial catch bearing 10 until the cover element 7 is closed. The cover element 7 is now closed (two-dot chain lines). Since the spinning rotor 2 has a correct axial length due to the correct assembly state, it is not displaced by the cover element 7. If, after the cover element 7 is closed, the spinning rotor 2 is moved from the axial stop, here the front catch bearing 10, into its regular axial operating position 11, the first travel path s therefore corresponds exactly to the predefined, first distance s0.
- Figure 5 shows a further step that can be carried out both in the method after the first execution and in the method after the second execution.
- the spinning rotor 2 is thereby by means 8
- the second travel h is detected by means 9 for detecting the axial position and compared with the predefined second distance h0. If the second travel path h is smaller than the second distance h0, it can be concluded, for example, that the rear axial catch bearing 12 has a flight.
- Figure 6 shows the rear end of the rotor shaft 3 and the rear axial catch bearing 12 again in a detailed representation. It can be seen that, due to contamination 21 of the rear axial catch bearing 12, the spinning rotor 2 or the rotor shaft 3 cannot be moved by the full second distance h0, but already strikes the contamination 21 after a shorter second travel path h. If the second travel path h deviates from the second distance h0, the output device 16 ( Figure 1 ) a signal is output.
- the spinning rotor 2 Most of the faulty assembly states of the spinning rotor 2 can be identified by means of the described methods. How from Figure 2b emerges, the spinning rotor 2 also has a minimum gap km to the cover element 7 when it is in the correct assembly state when it is struck against the front axial catch bearing 10. A faulty assembly state, in which the deviation of the axial position of the rotor cup 4 is smaller than the minimum gap km, can therefore not be identified using the described methods become. Rather, the spinning rotor 2 can be moved up to the stop on the front axial catch bearing 10, despite the slightly faulty assembly.
- the coupling device 14 of the spinning rotor 2 therefore preferably has a locking device 17 with a catch area I.
- a locking device 17 is in the Figures 7 and 8 shown.
- the locking device 17 is designed in the form of an axial clip 19.
- Figure 7 shows a schematic sectional view of the coupling device 14 in a side view
- Figure 8 shows a sectional detailed view of the locking device 17 with the catch area I in a side view.
- the axial clip 19 can be designed, for example, in the form of a snap ring or O-ring which interacts with a corresponding recess 22 or groove.
- the catch area I describes the distance to the correctly coupled position at which the rotor cup 4 just snaps into the correctly coupled axial position. This catch area I is preferably larger than the minimum gap dimension km, so that the faulty assembly states can now be recognized with only slight deviations of the rotor cup 4 from the correct axial position.
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Abstract
Bei einem Verfahren zum Überprüfen eines Montagezustands eines Spinnrotors (2) ist der Spinnrotor (2) in einer Magnetlagerung (6) in einer vorderseitig mit einem Deckelelement (7) verschließbaren Offenendspinnvorrichtung (1) gelagert. Der Spinnrotor (2) umfasst einen Rotorschaft (3) mit einer Schulter (5) und eine lösbar mit dem Rotorschaft (3) verbundene Rotortasse (4) und die Magnetlagerung (6) weist Mittel zum Einstellen einer Axialposition des Rotorschafts (3), Mittel zum Erfassen der Axialposition und wenigstens ein vorderes axiales Fanglager (10) für die Schulter (5) des Rotorschafts (3) auf. Dabei wird für eine reguläre axiale Betriebsposition (11) des Spinnrotors (2) ein erster Abstand (s0) zwischen der Schulter (5) des Rotorschafts (3) und dem vorderen axialen Fanglager (10) definiert. Vor einem Starten des Spinnrotors (2) wird der Spinnrotor (2) axial in Richtung des vorderen axialen Fanglagers (10) verfahren, bis er einen axialen Anschlag erreicht, und ein erster Verfahrweg (s) des Spinnrotors (2) zwischen der regulären axialen Betriebsposition (11) und dem axialen Anschlag wird erfasst. Der erfasste erste Verfahrweg (s) wird mit dem ersten Abstand (s0) verglichen und der Spinnrotor (2) wird gestartet, wenn s = s0 und das Starten des Spinnrotors (2) wird verhindert, wenn s < s0. Eine entsprechende Offenendspinnvorrichtung (1) weist eine Steuervorrichtung (15) auf, die zur Durchführung des Verfahrens ausgelegt ist.In a method for checking an assembly state of a spinning rotor (2), the spinning rotor (2) is mounted in a magnetic bearing (6) in an open-end spinning device (1) which can be closed at the front with a cover element (7). The spinning rotor (2) comprises a rotor shaft (3) with a shoulder (5) and a rotor cup (4) detachably connected to the rotor shaft (3), and the magnetic bearing (6) has means for adjusting an axial position of the rotor shaft (3) for detecting the axial position and at least one front axial catch bearing (10) for the shoulder (5) of the rotor shaft (3). A first distance (s0) between the shoulder (5) of the rotor shaft (3) and the front axial catch bearing (10) is defined for a regular axial operating position (11) of the spinning rotor (2). Before starting the spinning rotor (2), the spinning rotor (2) is moved axially in the direction of the front axial catch bearing (10) until it reaches an axial stop, and a first travel path (s) of the spinning rotor (2) between the regular axial operating position (11) and the axial stop is detected. The detected first travel path (s) is compared with the first distance (s0) and the spinning rotor (2) is started if s = s0 and the starting of the spinning rotor (2) is prevented if s <s0. A corresponding open-end spinning device (1) has a control device (15) which is designed to carry out the method.
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Überprüfen eines Montagezustands eines Spinnrotors, welcher einen Rotorschaft mit einer Schulter und eine lösbar mit dem Rotorschaft verbundene Rotortasse umfasst. Der Spinnrotor ist in einer Magnetlagerung in einer vorderseitig mit einem Deckelelement verschließbaren Offenendspinnvorrichtung gelagert. Die Magnetlagerung weist Mittel zum Einstellen einer Axialposition des Rotorschafts, Mittel zum Erfassen der Axialposition und wenigstens ein vorderes axiales Fanglager für die Schulter des Rotorschafts auf.The present invention relates to a method for checking an assembly state of a spinning rotor, which comprises a rotor shaft with a shoulder and a rotor cup detachably connected to the rotor shaft. The spinning rotor is mounted in a magnetic bearing in an open-end spinning device that can be closed with a cover element on the front. The magnetic bearing has means for adjusting an axial position of the rotor shaft, means for detecting the axial position and at least one front axial catch bearing for the shoulder of the rotor shaft.
Spinnrotoren heutiger Offenendspinnmaschinen werden aufgrund der hohen Drehzahlen von weit über 100.000 1/min häufig in Magnetlagerungen gelagert. Diese sind gegenüber rein mechanischen Lagerungen bei sehr hohen Drehzahlen vorteilhaft, da sie nur geringe Reibungsverluste aufweisen und kaum verschleißanfällig sind. Sie können sowohl als passive Lagerungen mit Permanentmagneten ausgeführt werden als auch als aktive Lagerungen mit geregelten Elektromagneten. Eine berührungslose Lagerung in radialer und axialer Richtung ist nur mit passiven Lagerungen jedoch nicht möglich. Werden bei Offenendspinnvorrichtungen passive Magnetlager eingesetzt, so werden diese in der Regel für die radiale Lagerung verwendet. Damit der Spinnrotor auch in axialer Richtung eine vorgegebene Betriebsposition beibehält, werden passive Magnetlager mit einer zusätzlichen Lageregelung für die Axialposition versehen. Bei aktiv geregelten Magnetlagerungen wird hingegen sowohl die Radialposition als auch die Axialposition des Spinnrotors permanent erfasst und entsprechend geregelt. Sowohl die Lageregelung bei passiven Magnetlagerungen als auch die aktiv geregelten Magnetlagerungen sind von einer ständigen Stromversorgung abhängig. Um im Falle von Störungen eine Beschädigung der Magnetlagerung zu vermeiden, sind daher mechanische Fanglager vorgesehen. Die vorliegende Erfindung befasst sich mit beiden Arten von Magnetlagerungen.Spinning rotors of today's open-end spinning machines are often stored in magnetic bearings due to the high speeds of well over 100,000 rpm. These are advantageous compared to purely mechanical bearings at very high speeds because they have only low friction losses and are hardly susceptible to wear. They can be designed as passive bearings with permanent magnets as well as active bearings with controlled electromagnets. Non-contact storage in the radial and axial directions is not possible with passive bearings. If passive magnetic bearings are used in open-end spinning devices, they are generally used for radial bearings. So that the spinning rotor maintains a predetermined operating position in the axial direction, passive magnetic bearings are provided with an additional position control for the axial position. In the case of actively controlled magnetic bearings, on the other hand, both the radial position and the axial position of the spinning rotor are permanently recorded and controlled accordingly. Both the position control for passive magnetic bearings and the actively controlled magnetic bearings are dependent on a constant power supply. In order to avoid damage to the magnetic bearings in the event of malfunctions, therefore mechanical catch bearing provided. The present invention deals with both types of magnetic bearings.
Eine Offenendspinnvorrichtung mit einer passiven Magnetlagerung und einer Lageregelung für die Axialposition (Mittellageregelung) ist beispielsweise aus der
Derartige Magnetlagerungen beinhalten jeweils eine vordere und eine hintere Lagestelle mit Magneteinrichtungen, also entweder Permanentmagneten, aktiv ansteuerbare Elektromagneten oder auch eine Kombination der beiden. Ein Teil dieser Magneteinrichtungen ist dabei am umlaufenden Rotorschaft des Spinnrotors festgelegt und wirkt mit feststehenden Magneteinrichtungen, die am Lagergehäuse des Spinnrotors festgelegt sind, zusammen. Die Montage und der Ausbau eines derartigen Spinnrotors ist daher mit einem erheblichen Aufwand verbunden. Um die Rotortasse beispielsweise bei Verschleiß oder Partiewechsel schnell austauschen zu können, ist diese daher mittels einer Kupplungsvorrichtung lösbar mit dem Rotorschaft verbunden.Such magnetic bearings each contain a front and a rear position with magnetic devices, ie either permanent magnets, actively controllable electromagnets or a combination of the two. A part of these magnetic devices is fixed on the rotating rotor shaft of the spinning rotor and interacts with fixed magnetic devices which are fixed on the bearing housing of the spinning rotor. The assembly and removal of such a spinning rotor is therefore associated with considerable effort. In order to be able to quickly replace the rotor cup, for example in the event of wear or a lot change, it is therefore detachably connected to the rotor shaft by means of a coupling device.
Ein Spinnrotor mit einer Kupplungsvorrichtung ist aus der
Die Aufgabe wird gelöst durch ein Verfahren und eine Offenendspinnvorrichtung mit den Merkmalen der unabhängigen Patentansprüche.The object is achieved by a method and an open-end spinning device with the features of the independent claims.
Bei dem Verfahren zum Überprüfen eines Montagezustands eines Spinnrotors ist der Spinnrotor in einer Magnetlagerung in einer vorderseitig mit einem Deckelelement verschließbaren Offenendspinnvorrichtung gelagert. Der Spinnrotor weist einen Rotorschaft mit einer Schulter und eine lösbar mit dem Rotorschaft verbundene Rotortasse auf. Die Magnetlagerung beinhaltet Mittel zum Einstellen einer Axialposition des Rotorschafts, Mittel zum Erfassen der Axialposition und wenigstens ein vorderes Fanglager für die Schulter des Rotorschafts.In the method for checking an assembled state of a spinning rotor, the spinning rotor is mounted in a magnetic bearing in an open-end spinning device that can be closed with a cover element on the front. The spinning rotor has a rotor shaft with a shoulder and a rotor cup detachably connected to the rotor shaft. The magnetic bearing includes means for adjusting an axial position of the rotor shaft, means for detecting the axial position and at least one front catch bearing for the shoulder of the rotor shaft.
Um den Montagezustand des Spinnrotors zu überprüfen, d. h. festzustellen, ob sich die Rotortasse in Bezug auf den Rotorschaft in der korrekten axialen Position befindet, wird für eine reguläre axiale Betriebsposition des Spinnrotors ein erster Abstand zwischen der Schulter des Rotorschafts und dem vorderen Fanglager definiert. Vor einem Starten des Spinnrotors wird der Spinnrotor axial in Richtung des vorderen Fanglagers verfahren, bis er einen axialen Anschlag erreicht. Ein erster Verfahrweg des Spinnrotors zwischen der regulären axialen Betriebsposition und dem axialen Anschlag wird erfasst und mit dem ersten Abstand verglichen. Der Spinnrotor wird gestartet, wenn der erste Verfahrweg gleich dem zuvor definierten, ersten Abstand ist. Das Starten des Spinnrotors wird hingegen verhindert, wenn der ermittelte Verfahrweg kleiner als der zuvor definierte erste Abstand ist.To check the assembly status of the spinning rotor, i. H. To determine whether the rotor cup is in the correct axial position with respect to the rotor shaft, a first distance between the shoulder of the rotor shaft and the front catch bearing is defined for a regular axial operating position of the spinning rotor. Before starting the spinning rotor, the spinning rotor is moved axially in the direction of the front catch bearing until it reaches an axial stop. A first travel path of the spinning rotor between the regular axial operating position and the axial stop is recorded and compared with the first distance. The spinning rotor is started when the first travel path is equal to the previously defined first distance. The spinning rotor, on the other hand, is prevented from starting if the determined travel path is smaller than the previously defined first distance.
Eine entsprechende Offenendspinnvorrichtung, welche vorderseitig mit einem Deckelelement verschließbar ist, weist eine Steuervorrichtung auf, die zur Durchführung des Verfahrens ausgelegt ist.A corresponding open-end spinning device, which can be closed at the front with a cover element, has a control device which is designed to carry out the method.
Der Erfindung liegt der Gedanke zugrunde, dass der in seiner regulären axialen Betriebsposition in der Magnetlagerung aufgenommene Spinnrotor nur dann um den vollen Verfahrweg, also den ersten Abstand zwischen der Schulter des Rotorschafts und dem vorderen Fanglager, gegen das vordere Fanglager verfahren werden kann, wenn er einen korrekten Montagezustand aufweist. Da sich in diesem Fall die Rotortasse in ihrer korrekten axialen Position gegenüber dem Rotorschaft befindet, kann der Spinnrotor aus seiner regulären axialen Betriebsposition in Richtung des vorderen axialen Fanglagers verfahren werden, bis er an dieses anschlägt. Der axiale Anschlag, der den Verfahrweg des Spinnrotors begrenzt, wird somit in diesem Fall durch das vordere axiale Fanglager gebildet. Der Verfahrweg des Spinnrotors bzw. des Rotorschafts entspricht daher auch exakt dem zuvor definierten Abstand zwischen der Schulter des Rotorschafts und dem vorderen Fanglager.The invention is based on the idea that the spinning rotor accommodated in its regular axial operating position in the magnetic bearing can only be moved against the front catching bearing by the full travel distance, i.e. the first distance between the shoulder of the rotor shaft and the front catching bearing, if it has a correct installation condition. In this case, since the rotor cup is in its correct axial position in relation to the rotor shaft, the spinning rotor can be moved from its regular axial operating position in the direction of the front axial catch bearing until it strikes it. The axial stop, which limits the travel of the spinning rotor, is thus formed in this case by the front axial catch bearing. The travel of the spinning rotor or the rotor shaft therefore corresponds exactly to the previously defined distance between the shoulder of the rotor shaft and the front catch bearing.
Weist hingegen der Spinnrotor einen fehlerhaften Montagezustand auf, d. h. ist die Rotortasse nicht vollständig auf den Rotorschaft aufgeschoben oder in diesen eingesteckt, weist der Spinnrotor eine größere axiale Länge auf. Wird nun dieser Spinnrotor in Richtung des vorderen axialen Fanglagers verfahren, so stößt der Spinnrotor aufgrund der größeren Länge mit dem Rand der Rotortasse an dem Deckelelement der Offenendspinnvorrichtung an, bevor die Schulter des Rotorschafts das vordere axiale Fanglager erreicht hat. Der axiale Anschlag, der den Verfahrweg des Spinnrotors begrenzt, wird in diesem Fall nicht durch das axiale Fanglager, sondern durch das Deckelelement gebildet. Der Verfahrweg zwischen der regulären Betriebsposition und dem axialen Anschlag ist daher kürzer als der erste Abstand zwischen der regulären Betriebsposition und dem vorderen axialen Fanglager.On the other hand, if the spinning rotor has a faulty assembly state, i. H. If the rotor cup is not completely pushed onto or inserted into the rotor shaft, the spinning rotor has a greater axial length. If this spinning rotor is now moved in the direction of the front axial catching bearing, the spinning rotor strikes the cover element of the open-end spinning device due to the greater length with the edge of the rotor cup before the shoulder of the rotor shaft has reached the front axial catching bearing. In this case, the axial stop that limits the travel of the spinning rotor is not formed by the axial catch bearing, but by the cover element. The travel distance between the regular operating position and the axial stop is therefore shorter than the first distance between the regular operating position and the front axial catch bearing.
Für die Ermittlung des Verfahrwegs zwischen der regulären axialen Betriebsposition und dem axialen Anschlag ist es unerheblich, ob der Spinnrotor aus der regulären axialen Betriebsposition bis zu dem axialen Anschlag verfahren wird oder umgekehrt von dem axialen Anschlag bis zu der regulären axialen Betriebsposition. Wesentlich ist lediglich, dass der Verfahrweg mit dem zuvor definierten Vergleichsmaß, also dem ersten Abstand zwischen der regulären Betriebsposition und dem vorderen axialen Fanglager, verglichen wird.For determining the travel distance between the regular axial operating position and the axial stop, it is irrelevant whether the spinning rotor is moved from the regular axial operating position to the axial stop or vice versa from the axial stop to the regular axial operating position. It is only essential that the travel path with the previously defined comparison measure, that is, the first distance between the regular operating position and the front axial catch bearing is compared.
Vorteilhaft bei dem beschriebenen Verfahren und der beschriebenen Offenendspinnvorrichtung ist es, dass das gesamte Verfahren automatisiert mithilfe von Komponenten durchgeführt werden kann, welche ohnehin Bestandteil der Magnetlagerung bzw. der Offenendspinnvorrichtung sind. Da keinerlei zusätzliche Komponenten erforderlich sind, können das Verfahren und die Offenendspinnvorrichtung auch entsprechend kostengünstig ausgeführt werden. Besonders vorteilhaft ist es weiterhin auch, dass das Verfahren vollständig automatisiert durchgeführt werden kann. In vorteilhafter Weise wird dabei das Starten eines fehlerhaft montierten Spinnrotors verhindert, wodurch auch die Sicherheit des Bedienpersonals sichergestellt wird.It is advantageous in the described method and the described open-end spinning device that the entire method can be carried out automatically with the aid of components which are in any case part of the magnetic bearing or the open-end spinning device. Since no additional components are required, the method and the open-end spinning device can also be carried out correspondingly inexpensively. It is also particularly advantageous that the method can be carried out completely automatically. This advantageously prevents the start of an incorrectly installed spinning rotor, which also ensures the safety of the operating personnel.
Nach einer ersten Ausführung der Erfindung wird vor dem Starten des Spinnrotors zunächst das Deckelelement der Offenendspinnvorrichtung geschlossen und der Spinnrotor in seine reguläre axiale Betriebsposition verfahren. Erst dann wird der Spinnrotor in Richtung des vorderen axialen Fanglagers verfahren, bis er den axialen Anschlag erreicht. Dies bedeutet, dass die Magnetlagerung nach dem Schließen der Offenendspinnvorrichtung aktiviert wird und der Spinnrotor in seine reguläre axiale Betriebsposition gebracht wird. Aus dieser wird er dann mit den Mitteln zum Einstellen der Axialposition des Rotorschafts in Richtung des vorderen axialen Fanglagers verfahren, bis er den axialen Anschlag erreicht.According to a first embodiment of the invention, before the spinning rotor is started, the cover element of the open-end spinning device is first closed and the spinning rotor is moved into its regular axial operating position. Only then is the spinning rotor moved in the direction of the front axial catch bearing until it reaches the axial stop. This means that the magnetic bearing is activated after the open-end spinning device is closed and the spinning rotor is brought into its regular axial operating position. From this he is then moved with the means for adjusting the axial position of the rotor shaft in the direction of the front axial catch bearing until he reaches the axial stop.
Nach einer alternativen Ausführung des Verfahrens wird hingegen zunächst der Spinnrotor in Richtung des vorderen Fanglagers verfahren, bis er den axialen Anschlag erreicht und erst dann wird das Deckelelement der Offenendspinnvorrichtung geschlossen und der Spinnrotor in die reguläre axiale Betriebsposition verfahren. In diesem Fall wird die Magnetlagerung bereits vor dem Schließen der Offenendspinnvorrichtung aktiviert und der Spinnrotor bis zu dem axialen Anschlag verfahren. Wird dann die Offenendspinnvorrichtung mit dem Deckelelement verschlossen, so wird der gesamte Spinnrotor durch das Deckelelement in axialer Richtung nach hinten verschoben. Somit bildet bei falsch montiertem Spinnrotor das Deckelelement den axialen Anschlag, bei richtig montiertem Spinnrotor bildet hingegen das vordere axiale Fanglager den axialen Anschlag. Wird nun nach dem Schließen der Offenendspinnvorrichtung der Spinnrotor von dem axialen Anschlag in seine reguläre axiale Betriebsposition verfahren, so kann aus dem Verfahrweg wiederum auf den Montagezustand des Spinnrotors geschlossen werden.According to an alternative embodiment of the method, on the other hand, the spinning rotor is first moved in the direction of the front catch bearing until it reaches the axial stop, and only then is the cover element of the open-end spinning device closed and the spinning rotor is moved into the regular axial operating position. In this case, the magnetic bearing is activated before the open-end spinning device closes and the spinning rotor is moved up to the axial stop. Then becomes the open end spinning device closed with the cover element, the entire spinning rotor is displaced backwards in the axial direction by the cover element. Thus, if the spinning rotor is incorrectly installed, the cover element forms the axial stop; if the spinning rotor is correctly installed, however, the front axial catch bearing forms the axial stop. If the spinning rotor is now moved from the axial stop into its regular axial operating position after the open-end spinning device has been closed, the assembly state of the spinning rotor can in turn be inferred from the travel path.
Nach einer Weiterbildung des Verfahrens wird vor dem Starten des Spinnrotors der Spinnrotor zusätzlich in Richtung eines hinteren axialen Fanglagers verfahren, bis er mit einer hinteren Lagerfläche an dem hinteren axialen Fanglager anschlägt. Die Magnetlagerung weist in diesem Fall ein hinteres axiales Fanglager und der Rotorschaft eine hintere Lagerfläche zum Anschlagen an das hintere Fanglager auf. Aus dem Verfahrweg zwischen dem hinteren axialen Fanglager und einem Bezugspunkt, beispielsweise der regulären axialen Betriebsposition oder dem vorderen axialen Fanglager, können weitere Informationen hinsichtlich der Betriebsbereitschaft der Offenendspinnvorrichtung gewonnen werden. Beispielsweise kann hieraus auf Verschmutzungen oder Beschädigungen in der Lagerung geschlossen werden.According to a further development of the method, before the spinning rotor is started, the spinning rotor is additionally moved in the direction of a rear axial catch bearing until it strikes the rear axial catch bearing with a rear bearing surface. In this case, the magnetic bearing has a rear axial catch bearing and the rotor shaft has a rear bearing surface for striking the rear catch bearing. Further information regarding the operational readiness of the open-end spinning device can be obtained from the travel path between the rear axial catch bearing and a reference point, for example the regular axial operating position or the front axial catch bearing. For example, contamination or damage in the bearing can be concluded from this.
Vorzugsweise wird dabei für die reguläre axiale Betriebsposition des Spinnrotors ein zweiter Abstand zwischen der hinteren Lagerfläche des Rotorschafts und dem hinteren Fanglager definiert und der Spinnrotor zwischen der regulären axialen Betriebsposition und dem hinteren Fanglager verfahren. Dabei wird ein zweiter Verfahrweg des Spinnrotors erfasst. Anschließend wird der erfasste zweite Verfahrweg mit dem zweiten Abstand zwischen der regulären axialen Betriebsposition und dem hinteren Fanglager verglichen. Aus einer Abweichung des ermittelten zweiten Verfahrwegs von dem definierten zweiten Abstand kann auf Beschädigungen und/oder Verschmutzungen des hinteren axialen Fanglagers geschlossen werden.Preferably, a second distance between the rear bearing surface of the rotor shaft and the rear catch bearing is defined for the regular axial operating position of the spinning rotor and the spinning rotor is moved between the regular axial operating position and the rear catch bearing. A second travel path of the spinning rotor is recorded. The detected second travel path is then compared with the second distance between the regular axial operating position and the rear catch bearing. From a deviation of the determined second travel distance from the defined second distance, damage and / or contamination of the rear axial catch bearing can be concluded.
Daneben ist es vorteilhaft, wenn bei einer Abweichung des ersten Verfahrwegs von dem ersten Abstand und/oder bei einer Abweichung des zweiten Verfahrwegs von dem zweiten Abstand ein Signal durch die Offenendspinnvorrichtung ausgegeben wird. Die Offenendspinnvorrichtung weist hierzu eine Ausgabeeinrichtung auf, welche bei einer solchen Abweichung von der Steuereinrichtung ansteuerbar ist. Das Bedienpersonal kann hierdurch schnell erkennen, dass und gegebenenfalls auch weshalb die betreffende Offenendspinnvorrichtung nicht in Betrieb gesetzt wurde.In addition, it is advantageous if a signal is output by the open-end spinning device if the first travel distance deviates from the first distance and / or if the second travel distance deviates from the second distance. For this purpose, the open-end spinning device has an output device which can be controlled by the control device in the event of such a deviation. In this way, the operating personnel can quickly see that and possibly also why the open-end spinning device in question has not been put into operation.
Nach einer vorteilhaften Weiterbildung des Verfahrens wird das Ermitteln des ersten Verfahrwegs und/oder das Ermitteln des zweiten Verfahrwegs vor jedem Starten des Spinnrotors durchgeführt. Hierdurch können nach einem Stopp der Offenendspinnvorrichtung auch Fehler, welche nach der erfolgreichen ersten Inbetriebnahme aufgetreten sind, zuverlässig erfasst werden. Denkbar ist es aber auch, dass der Spinnrotor nach einem Stopp aufgrund eines normalen, automatischen Wartungsvorgangs nicht mehr erneut überprüft wird. Derartige normale Wartungsvorgänge sind beispielsweise das Anspinnen nach einem Fadenbruch oder einem Reinigerschnitt, nach der Rotorreinigung oder auch einem Spulenwechsel. Das Ermitteln des ersten Verfahrwegs und/oder des zweiten Verfahrwegs könnte beispielsweise auch turnusmäßig nach jeweils einer bestimmten Anzahl von Wartungsvorgängen durchgeführt werden oder aber sogar auf die Erstinbetriebnahme nach einem Partiewechsel beschränkt bleiben.According to an advantageous development of the method, the determination of the first travel path and / or the determination of the second travel path is carried out before each start of the spinning rotor. As a result, after the open-end spinning device has stopped, errors which have occurred after the successful initial start-up can also be reliably detected. However, it is also conceivable that the spinning rotor is no longer checked again after a stop due to a normal, automatic maintenance process. Such normal maintenance processes are, for example, piecing after a thread break or a cleaner cut, after cleaning the rotor or even changing the bobbin. The determination of the first travel path and / or the second travel path could, for example, also be carried out in rotation after a certain number of maintenance processes in each case, or could even be limited to the initial start-up after a lot change.
Bei der Offenendspinnvorrichtung ist es weiterhin vorteilhaft, wenn die Kupplungsvorrichtung des Spinnrotors eine Arretiervorrichtung umfasst. Zumindest das unbeabsichtigte Lösen der Kupplungsvorrichtung nach der korrekten Montage des Spinnrotors, beispielsweise beim Betrieb, kann hierdurch vermieden werden.In the case of the open-end spinning device, it is furthermore advantageous if the coupling device of the spinning rotor comprises a locking device. At least the unintentional loosening of the coupling device after the correct assembly of the spinning rotor, for example during operation, can thereby be avoided.
Vorteilhaft ist es, wenn die Arretiervorrichtung einen Fangbereich aufweist, welcher bei der Montage des Spinnrotors einen korrekten Montagezustand des Spinnrotors sicherstellt. Dies bedeutet, dass der Spinnrotor automatisch in den korrekten Montagezustand rutscht, sobald bei der Montage der Rotortasse an den Rotorschaft der Fangbereich der Kupplungsvorrichtung erreicht wird. Hierdurch ist es möglich, fehlerhafte Montagen mit nur geringfügigen Abweichungen vom korrekten Montagezustand zu vermeiden. Derartige fehlerhafte Montagen können im Vergleich zu solchen mit großen Abweichungen nämlich häufig weder optisch durch das Bedienpersonal erfasst, noch nach dem Einsetzen in die Spinnvorrichtung mittels des beschriebenen Verfahrens erkannt werden. Die Sicherheit der Offenendspinnvorrichtung kann hierdurch weiter erhöht werden. Eine solche Arretiervorrichtung mit einem Fangbereich kann beispielsweise mit einem Axialclip realisiert werden.It is advantageous if the locking device has a catch area which, when the spinning rotor is assembled, has a correct assembly state of the spinning rotor. This means that the spinning rotor automatically slips into the correct assembly state as soon as the catching area of the coupling device is reached when the rotor cup is mounted on the rotor shaft. This makes it possible to avoid faulty assemblies with only slight deviations from the correct assembly state. In comparison to those with large deviations, such faulty assemblies can often neither be visually detected by the operating personnel, nor can they be recognized by means of the described method after being inserted into the spinning device. The safety of the open-end spinning device can thereby be increased further. Such a locking device with a catch area can be implemented, for example, with an axial clip.
Um bei nur geringfügig fehlerhaften Montagen eine größtmögliche Sicherheit zu erreichen, ist es vorteilhaft, wenn der Spinnrotor bei Anlage der Schulter an dem vorderen Fanglager und bei korrektem Montagezustand einen Minimalspalt zu dem Deckelelement aufweist und der Fangbereich der Arretiervorrichtung größer ist als der Minimalspalt. Die Sicherheit der Offenendspinnvorrichtung kann hierdurch für alle fehlerhaften Montagezustände des Spinnrotors gewährleistet werden, da größere Montagefehler mittels des beschriebenen Verfahrens erkannt werden können und kleinere Montagefehler durch die Arretiervorrichtung mit dem Fangbereich vermieden werden.In order to achieve the greatest possible safety with only slightly faulty assemblies, it is advantageous if the spinning rotor has a minimal gap to the cover element when the shoulder rests against the front catch bearing and when the assembly is correct, and the catch range of the locking device is larger than the minimum gap. The safety of the open-end spinning device can hereby be guaranteed for all faulty assembly states of the spinning rotor, since larger assembly errors can be recognized by means of the described method and smaller assembly errors can be avoided by the locking device with the catch area.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigen:
-
Figur 1 - eine schematische, geschnittene Seitenansicht einer Offenendspinnvorrichtung mit einer Magnetlagerung und einem Spinnrotor,
- Figur 2a
- eine schematische, geschnittene Seitenansicht eines korrekt montierten Spinnrotors in seiner regulären Betriebsposition,
- Figur 2b
- den korrekt montierten Spinnrotor der
Figur 2a , nachdem er an das vordere axiale Fanglager angeschlagen ist, - Figur 3a
- eine schematische, geschnittene Seitenansicht eines fehlerhaft montierten Spinnrotors in seiner regulären Betriebsposition,
- Figur 3b
- den fehlerhaft montierten Spinnrotor der
Figur 3a , nachdem er an das Deckelelement der Spinnvorrichtung angeschlagen ist, - Figur 4a
- eine schematische, geschnittene Seitenansicht eines fehlerhaft montierten Spinnrotors nach dem Anschlagen an das vordere axiale Fanglager und vor dem Schließen des Deckelelements,
- Figur 4b
- den fehlerhaft montierten Spinnrotor der
Figur 4a , nachdem das Deckelelement geschlossen wurde und der Spinnrotor verschoben wurde, - Figur 4c
- eine schematische, geschnittene Seitenansicht eines korrekt montierten Spinnrotors, nach dem Anschlagen an das vordere axiale Fanglager und vor dem Schließen des Deckelelements,
-
Figur 5 - eine schematische, geschnittene Seitenansicht eines Spinnrotors nach dem Anschlagen an das hintere axiale Fanglager,
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Figur 6 - eine geschnittene Detaildarstellung einer hinteren Lagerfläche eines Spinnrotors und eines hinteren axialen Fanglagers,
-
Figur 7 - eine geschnittene Detaildarstellung einer Kupplungsvorrichtung eines Spinnrotors mit einer Arretiervorrichtung, sowie
-
Figur 8 - eine geschnittene Detaildarstellung einer Arretiervorrichtung mit einem Fangbereich.
- Figure 1
- 2 shows a schematic, sectional side view of an open-end spinning device with a magnetic bearing and a spinning rotor,
- Figure 2a
- a schematic, sectional side view of a correctly assembled spinning rotor in its regular operating position,
- Figure 2b
- the correctly installed spinning rotor of the
Figure 2a after hitting the front axial safety bearing, - Figure 3a
- a schematic, sectional side view of an incorrectly assembled spinning rotor in its regular operating position,
- Figure 3b
- the incorrectly installed spinning rotor
Figure 3a after striking the lid element of the spinning device, - Figure 4a
- 2 shows a schematic, sectional side view of an incorrectly mounted spinning rotor after striking the front axial catch bearing and before closing the cover element,
- Figure 4b
- the incorrectly installed spinning rotor
Figure 4a after the cover element has been closed and the spinning rotor has been moved, - Figure 4c
- a schematic, sectional side view of a correctly assembled spinning rotor, after striking the front axial catch bearing and before closing the cover element,
- Figure 5
- 2 shows a schematic, sectional side view of a spinning rotor after striking the rear axial catch bearing,
- Figure 6
- FIG. 2 shows a sectional detailed illustration of a rear bearing surface of a spinning rotor and a rear axial catch bearing,
- Figure 7
- a sectional detailed view of a coupling device of a spinning rotor with a locking device, and
- Figure 8
- a detailed sectional view of a locking device with a capture area.
Bei der nachfolgenden Beschreibung der Figuren werden für Merkmale, die bei den einzelnen Ausführungen bzw. den einzelnen Figuren jeweils identisch oder zumindest vergleichbar sind, gleiche Bezugszeichen verwendet. Einige der Merkmale werden daher nur bei ihrer ersten Erwähnung bzw. nur einmal anhand einer geeigneten Figur erläutert. Sofern diese Merkmale in Verbindung mit den weiteren Figuren nicht nochmals gesondert erläutert werden, entspricht deren Ausgestaltung und/oder Wirkweise der Ausgestaltung und Wirkweise der identischen oder vergleichbaren, beschriebenen Merkmale. Aus Gründen der Übersichtlichkeit ist weiterhin bei mehreren identischen Merkmalen oder Bauteilen in einer Figur meist nur eines oder sind nur wenige dieser identischen Merkmale beschriftet.In the following description of the figures, the same reference numerals are used for features that are identical or at least comparable in the individual designs or the individual figures. Some of the features are therefore only explained when they are first mentioned or only once using a suitable figure. If these features are not explained separately in connection with the other figures, their design and / or mode of operation corresponds to the design and mode of operation of the identical or comparable features described. For reasons of clarity, in the case of several identical features or components in a figure, usually only one or only a few of these identical features are labeled.
Unabhängig von der Ausführung der Magnetlagerung 6 als aktives oder als passives Magnetlager weist die Magnetlagerung 6 Mittel 8 zum Einstellen der Axialposition des Spinnrotors 2 bzw. des Rotorschafts 3 sowie Mittel 9 zum Erfassen der Axialposition auf. Vorliegend sind diese im Bereich eines rückwärtigen Endes des Spinnrotors 2 angeordnet, je nach Ausführung der Magnetlagerung 6 wäre jedoch auch eine andere Anordnung denkbar. Im einfachsten Fall beinhalten die Mittel 9 zum Erfassen der Axialposition des Spinnrotors 2 eine Sensorspule, die die erfasste Axialposition der Steuervorrichtung 15 meldet, und die Mittel 8 zum Einstellen der Axialposition eine durch die Steuervorrichtung 15 ansteuerbare Magnetspule. Ebenso können die Mittel 8 zum Einstellen der Axialposition aber auch einen oder mehrere geregelte Elektromagneten einer aktiven Magnetlagerung 6 und die Mittel 9 zum Erfassen der Axialposition mehrere Positionssensoren umfassen. Dabei ist es auch möglich, dass die Mittel 9 zum Erfassen der absoluten Position des Spinnrotors 2 in der Magnetlagerung 6 ausgebildet sind. Zur Durchführung des Verfahrens ist es jedoch ausreichend, wenn die Mittel 9 lediglich zum Erfassen einer Lageänderung des Spinnrotors 2 in axialer Richtung ausgebildet sind. Aus der erfassten Lageänderung sowie den Steuerdaten der Mittel 8 zum Einstellen der Axialposition kann dennoch auf die tatsächliche Position des Spinnrotors 2 geschlossen werden.Regardless of the design of the
Weiterhin weist die Offenendspinnvorrichtung 1 in an sich bekannter Weise ein vorderes axiales Fanglager 10 sowie ein hinteres axiales Fanglager 12 auf, welche das Aufeinandertreffen der rotierenden und der stationären Teile der Magnetlagerung 6 bei Stromausfall oder beim Auftreten von Schwingungen verhindern. Der Spinnrotor 2 weist entsprechend eine Schulter 5 auf, welche mit dem vorderen axialen Fanglager 10 zusammenwirkt. Zum Zusammenwirken mit dem hinteren axialen Fanglager 12 weist der Spinnrotor 2 eine hintere Lagerfläche 13 auf, die vorliegend durch das rückwärtige Ende des Rotorschafts 3 gebildet ist. In seiner regulären axialen Betriebsposition 11 (siehe
Eine erste Ausführung des Verfahrens zum Überprüfen eines Montagezustands eines Spinnrotors 2 wird nun anhand der
In
Wird nun der Spinnrotor 2 durch die Mittel 8 zum Einstellen der Axialposition in Richtung des vorderen axialen Fanglagers 10 bewegt, so stößt der Spinnrotor 2 mit der Rotortasse 4 an dem Deckelelement 7 an, bevor die Schulter 5 das vordere axiale Fanglager 10 erreicht.
Eine zweite Ausführung des Verfahrens wird anhand der
Wie nun in
Mittels der beschriebenen Verfahren lassen sich die meisten fehlerhaften Montagezustände des Spinnrotors 2 erkennen. Wie allerdings aus
Vorzugsweise weist daher die Kupplungsvorrichtung 14 des Spinnrotors 2 eine Arretiervorrichtung 17 mit einem Fangbereich I auf. Eine solche Arretiervorrichtung 17 ist in den
Die vorliegende Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. Abwandlungen im Rahmen der Patentansprüche sind ebenso möglich wie eine Kombination der Merkmale, auch wenn diese in unterschiedlichen Ausführungsbeispielen dargestellt und beschrieben sind.The present invention is not limited to the exemplary embodiments shown and described. Modifications within the scope of the claims are possible as well as a combination of the features, even if these are shown and described in different exemplary embodiments.
- 11
- OffenendspinnvorrichtungOpen end spinning device
- 22nd
- SpinnrotorSpinning rotor
- 33rd
- RotorschaftRotor shaft
- 44th
- RotortasseRotor cup
- 55
- Schultershoulder
- 66
-
Magnetlagerung
- 6a vorderes Radiallager
- 6b hinteres Radiallager
- 6c Axiallager
- 6a front radial bearing
- 6b rear radial bearing
- 6c thrust bearing
- 77
- DeckelelementCover element
- 88th
- Mittel zum Einstellen der AxialpositionMeans for adjusting the axial position
- 99
- Mittel zum Erfassen der AxialpositionMeans for detecting the axial position
- 1010th
- vorderes axiales Fanglagerfront axial catch bearing
- 1111
- reguläre axiale Betriebspositionregular axial operating position
- 1212
- hinteres axiales Fanglagerrear axial catch bearing
- 1313
- hintere Lagerflächerear storage area
- 1414
- KupplungsvorrichtungCoupling device
- 1515
- SteuervorrichtungControl device
- 1616
- AusgabeeinrichtungDispenser
- 1717th
- ArretiervorrichtungLocking device
- 1818th
- Antriebdrive
- 1919th
- AxialclipAxial clip
- 2020th
- LagerspaltBearing gap
- 2121st
- Verschmutzungpollution
- 2222
- AusnehmungRecess
- s0s0
- erster Abstandfirst distance
- ss
- erster Verfahrwegfirst travel path
- h0h0
- zweiter Abstandsecond distance
- hH
- zweiter Verfahrwegsecond travel path
- k0k0
- reguläres Spaltmaßregular gap size
- kmkm
- MinimalspaltmaßMinimum gap size
- kk
- SpaltmaßGap dimension
- II.
- FangbereichCatch area
Claims (14)
dass vor einem Starten des Spinnrotors (2) der Spinnrotor (2) axial in Richtung des vorderen axialen Fanglagers (10) verfahren wird, bis er einen axialen Anschlag erreicht, dass ein erster Verfahrweg (s) des Spinnrotors (2) zwischen der regulären axialen Betriebsposition (11) und dem axialen Anschlag erfasst wird und mit dem ersten Abstand (s0) verglichen wird
und dass der Spinnrotor (2) gestartet wird, wenn s = s0 und das Starten des Spinnrotors (2) verhindert wird, wenn s < s0.Method for checking an assembly state of a spinning rotor (2), which comprises a rotor shaft (3) with a shoulder (5) and a rotor cup (4) detachably connected to the rotor shaft (3), and which in a magnetic bearing (6) in front A cover element (7) which can be closed by an open-end spinning device (1) is mounted, the magnetic bearing (6) means for adjusting an axial position of the rotor shaft (3), means for detecting the axial position and at least one front axial catch bearing (10) for the shoulder (5) of the rotor shaft (3), characterized in that for a regular axial operating position (11) of the spinning rotor (2) defines a first distance (s0) between the shoulder (5) of the rotor shaft (3) and the front axial catch bearing (10) becomes,
that before starting the spinning rotor (2) the spinning rotor (2) is moved axially in the direction of the front axial catch bearing (10) until it reaches an axial stop, that a first travel path (s) of the spinning rotor (2) between the regular axial Operating position (11) and the axial stop is detected and compared with the first distance (s0)
and that the spinning rotor (2) is started if s = s0 and the starting of the spinning rotor (2) is prevented if s <s0.
dass der Spinnrotor (2) zwischen der regulären axialen Betriebsposition (11) und dem hinteren axialen Fanglager (12) verfahren wird, wobei ein zweiter Verfahrweg (h) des Spinnrotors (2) erfasst wird,
und dass der erfasste zweite Verfahrweg (h) mit dem zweiten Abstand (h0) zwischen der regulären axialen Betriebsposition (11) und dem hinteren axialen Fanglager (12) verglichen wird.Method according to the preceding claim, characterized in that for the regular axial operating position (11) of the spinning rotor (2) defines a second distance (h0) between the rear bearing surface (13) of the rotor shaft (3) and the rear axial catch bearing (12) becomes,
that the spinning rotor (2) is moved between the regular axial operating position (11) and the rear axial catching bearing (12), a second travel path (h) of the spinning rotor (2) being recorded,
and that the detected second travel path (h) is compared with the second distance (h0) between the regular axial operating position (11) and the rear axial catch bearing (12).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018124947.0A DE102018124947A1 (en) | 2018-10-10 | 2018-10-10 | Method for checking an assembly state of a spinning rotor of an open-end spinning device and open-end spinning device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3636811A1 EP3636811A1 (en) | 2020-04-15 |
EP3636811A9 true EP3636811A9 (en) | 2020-06-17 |
EP3636811B1 EP3636811B1 (en) | 2021-03-17 |
Family
ID=68242512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19202310.9A Active EP3636811B1 (en) | 2018-10-10 | 2019-10-09 | Open-end spinning device and method for checking a mounting condition of a spinning rotor of an open-end spinning device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3636811B1 (en) |
CN (1) | CN111020757B (en) |
DE (1) | DE102018124947A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117394644A (en) * | 2023-10-11 | 2024-01-12 | 陕西京泰纺织化纤(集团)有限公司 | Motor device for full-automatic rotor spinning machine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005032184A1 (en) * | 2005-07-09 | 2007-01-18 | Saurer Gmbh & Co. Kg | Method for operating an electric motor drive |
DE102006030187A1 (en) * | 2006-06-30 | 2008-01-10 | Oerlikon Textile Gmbh & Co. Kg | Bearing device for a spinning rotor |
DE102013108199A1 (en) * | 2013-07-31 | 2015-02-05 | Maschinenfabrik Rieter Ag | Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device |
DE102014001627B4 (en) * | 2014-02-07 | 2022-03-24 | Saurer Spinning Solutions Gmbh & Co. Kg | Open-end rotor spinning device and method of operating an open-end rotor spinning device |
DE102015111673A1 (en) * | 2015-07-17 | 2017-01-19 | Rieter Cz S.R.O. | Method for safely starting and / or stopping a rotor of a rotor spinning machine and rotor spinning machine |
DE102015016055A1 (en) * | 2015-12-11 | 2017-06-14 | Saurer Germany Gmbh & Co. Kg | Electric drive and open-end spinning device with the electric drive |
DE102016122595A1 (en) * | 2016-11-23 | 2018-05-24 | Maschinenfabrik Rieter Ag | Rotor cup and open-end spinning rotor with a rotor cup |
DE102017103622A1 (en) * | 2017-02-22 | 2018-08-23 | Rieter Cz S.R.O. | Method for supporting a spinning rotor and bearing, spinning rotor and support bearings |
-
2018
- 2018-10-10 DE DE102018124947.0A patent/DE102018124947A1/en not_active Withdrawn
-
2019
- 2019-10-08 CN CN201910950056.6A patent/CN111020757B/en active Active
- 2019-10-09 EP EP19202310.9A patent/EP3636811B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3636811A1 (en) | 2020-04-15 |
CN111020757A (en) | 2020-04-17 |
DE102018124947A1 (en) | 2020-04-16 |
EP3636811B1 (en) | 2021-03-17 |
CN111020757B (en) | 2022-11-08 |
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