WO2019057352A1

WO2019057352A1 - Drive system for an elevator system, and elevator system

Info

Publication number: WO2019057352A1
Application number: PCT/EP2018/065253
Authority: WO
Inventors: Manfred Weigl
Original assignee: Contitech Antriebssysteme Gmbh
Priority date: 2017-09-25
Filing date: 2018-06-11
Publication date: 2019-03-28
Also published as: DE102017216877A1

Abstract

The invention relates to a drive system (2) for an elevator system (4), comprising: an elevator belt (6); a plurality of deflecting units (8), which each have a deflecting roller (10); and a drive unit (12), which comprises one of the deflecting units (8) having the associated deflecting roller (10); wherein the deflecting roller (10) of the drive unit (12) is coupled to a drive motor of the drive unit (12) in order to drive the deflecting roller (10) of the drive unit (12), one of the deflecting units (8) is designed to be connected to an elevator car (14) of the elevator system (4), the elevator belt (6) and the deflecting rollers (10) are arranged in such a way that the elevator belt (6) is at least partly wrapped around each of the deflecting rollers (10), and the elevator belt (6) has at least one metal cable (16), which is completely laterally surrounded by a plastic (18) of the elevator belt (6) such that the at least one cable (16) is embedded in the plastic (18), characterized in that the drive system (2) has a sensor (20), which is associated with one of the deflecting units (8) and is designed to sense a structure-borne noise of the associated deflecting unit (8). The invention further relates to an elevator system (4) having such a drive system (2).

Description

description

Drive system for an elevator system and elevator system

The invention relates to a drive system for an elevator system and the elevator system as such.

Elevator systems are basically known from the prior art. An elevator system may also be referred to as an elevator, an elevator, a lift or an elevator installation. The elevator system has an elevator car which can be moved in a conveying direction by a drive system of the elevator system. The elevator car is used, for example, to carry people or loads. In this case, the elevator system may also be referred to as a conveyor system. To the elevator car in

To move conveying direction, the elevator car is coupled by means of deflection with an elevator belt. The elevator belt wraps around, for example, one or more deflection rollers of the corresponding number of deflection units. In addition, the elevator belt wraps around the deflection roller of a drive unit and the

Deflection pulley, which is rotatably coupled to a counterweight coupled. By means of the corresponding elevator drive, the belt can be driven, resulting in a movement of the elevator car in the conveying direction.

Elevator belts often have several steel cables embedded in the belts. In known elevator systems, the steel cables of the elevator belts are visually checked for wear at specific time intervals. It was found, however, that the wear of the steel cables within the elevator belt is hardly identifiable visually. A Another method for checking the wear of an elevator belt with embedded steel cables therefore provides to electrically contact the ends of the steel cables to carry out an electrical measurement of the electrical resistance of the cables in order to conclude, based on the measurement, the state of wear of the steel cables of the elevator belt. However, this method has disadvantages. Because when measuring the electrical resistance of steel cables, the full length of the steel cables is always used for the measurement. However, if, for example, a very short section of a steel cable of the elevator belt has a particularly high degree of wear, which then has the consequence for the entire elevator belt that it can be considered worn, the corresponding wear may possibly result in the measurement of the electrical resistance between the ends of the steel cable are barely detected. Because the steel cables are subject to a high mechanical stress due to their use, so that the steel cables are smaller in diameter with the use. This has the consequence that the electrical resistance of a corresponding cable also increases in a conventional use. The distinction between whether the increase in electrical resistance has resulted from the change in the diameter of the rope or by the wear of the rope in a very short place is barely detectable. This in turn means that the failure criteria have to be defined very critically, resulting in the exchange of

Elevator belt leads, which would have been quite useful if, for example, they have experienced only a small change in the diameter of the steel cables.

The invention is based on the object to provide a system that allows the longest possible and safe operation of an elevator.

According to a first aspect, the aforementioned object is achieved by a

Drive system with the features of claim 1. Provided is therefore a

Drive system for an elevator system. The drive system includes: a

Elevator belts, a plurality of deflection units, each having a deflection roller; and a drive unit comprising one of the deflection units with the associated deflection roller. The deflection roller of the drive unit is connected to a drive motor Drive unit coupled to drive the deflection roller of the drive unit. One of the diverting units is configured to be connected to an elevator car of the elevator system. The elevator belt and the deflection rollers are arranged such that the elevator belt partially wraps around each of the deflection rollers. The elevator belt has at least one metallic rope, the coat side completely by a

Plastic of the elevator belt is wrapped, so that at least one rope is embedded in the plastic. The drive system has a sensor which is assigned to one of the deflection units and is designed to detect structure-borne noise of the associated deflection unit.

Investigations have found that a rope in an elevator belt causes structure-borne noise, which becomes more intense, the greater the wear of the rope in the rope

Elevator belt is. The wear of an elevator belt occurs increasingly in the

Sections of the elevator belt, which are deflected by a deflection roller. This may be, for example, the deflection roller of a deflection unit, which is connected to an elevator car, the drive unit or a counterweight. If, therefore, a section of the elevator belt is deflected by the deflection roller, wherein the aforementioned section has a rope which is particularly severely worn, a structure-borne noise, which is characteristic for the corresponding wear, is caused during the deflection of the worn rope. Since the metallic rope of the elevator belt is often only very thinly coated with the plastic and this plastic layer is when deflecting the pulley under great mechanical bias, the structure-borne noise is transmitted from the worn rope on the plastic to the deflection roller and then to the entire deflection. In this case, transfer is preferably made to the mechanically interconnected parts, such as a shaft on which the deflection roller is mounted, bearing, a bearing block and / or other mechanical parts, which may have a deflection unit to ensure the stored movement of the deflection roller. If, therefore, a section of the elevator belt is deflected by a deflecting roller with a worn cable, a structure-borne noise caused by the worn cable is produced in the deflection unit. The drive system therefore has a sensor which is designed to detect structure-borne noise. In addition, this one is Sensor associated with the deflection, so that this sensor can detect the structure-borne noise of the corresponding deflection. Particularly preferably, the sensor is fixed to the deflection unit, for example with the deflection roller, a shaft which is connected to the deflection roller, a bearing for supporting the aforementioned shaft and / or a bearing block of the deflection unit, which absorbs the forces from the shaft or the deflection unit and for transmission to another component of the elevator system, such as the elevator car, is formed. In other words, the sensor may be arranged in such a way to detect the structure-borne noise of the deflection unit, in particular the associated deflection roller. Since the recorded structure-borne noise is characteristic of the wear of the respective deflected portion of the elevator belt and therefore also characteristic of the wear of the associated portion of the metallic rope, it is now very precise and easily possible with the sensor, an accurate statement about the wear state of the elevator belt hold true. Therefore, the elevator system with the aforementioned sensor offers the possibility of changing an elevator belt particularly quickly in the event of danger. In addition, however, the elevator system with this sensor also offers the possibility of using an elevator belt for an especially long time, when it is ensured that it has been detected by the sensor that the elevator belt has a condition which serves for safe operation of the elevator. As explained above, the sensor of the drive system serves, at least in the

Essentially, the structure-borne sound of the metallic rope from the portion which is deflected by the deflection unit, to which the sensor is assigned to detect. This offers the advantage that exactly the section of the elevator belt can be sensory examined, which is exposed to a particularly high stress. Because the deflection determines the area of the elevator belt, where the essential wear of the

Elevator belt takes place. By means of the sensor of the drive system so the wear of the part of the elevator belt can be detected, which is the most stressed. In addition, it should be noted that the detection of structure-borne noise by means of the sensor of the drive system is at least substantially due to a wear of the rope from the section of the elevator belt, which of the

Deflection unit is deflected, to which the sensor is assigned. In other words, will not the entire elevator belt examined by means of the sensor, but the measurement is made section-specific with respect to the section of the elevator belt, which is deflected by the corresponding deflection unit. This can also smaller

Wear changes of the rope from the corresponding section of the

Elevator belt, in particular with a higher sensitivity, are detected. If the elevator belt is continuously deflected by the deflection unit, a position-specific detection of structure-borne noise can be carried out by means of the sensor. This allows a position-specific assessment of the wear of the elevator belt or the associated rope. This allows a precise prediction of the overall condition of the elevator belt, in particular essentially determined by the worst condition of one of the sections of the elevator belt and / or by the worst condition at a position of the elevator belt. By means of the sensor of the drive system, it is therefore possible to determine information which is of high interest for the service of the elevator, in particular in order to avoid critical situations and / or to offer maintenance intervals as long as possible.

For the elevator belt, it is provided that this has at least one metallic cable, which is sheathed on the shell side by the plastic of the elevator belt. The plastic is preferably a polyurethane-based plastic. Thus, the plastic may be polyurethane-based, thermosetting plastic or polyurethane-based, elastomeric plastic. The metallic rope can be wrapped in the circumferential direction at least partially very thin of the plastic. Thus, the plastic covering, in particular in the aforementioned part, have a thickness in the radial direction of the rope of less than 1 mm. For example, the plastic here may have a thickness of about 0.5 mm. The or each rope of the

However, elevator belt is preferably completely enclosed by the plastic without gaps and / or directly on the shell side. Therefore, at least after the immediate production of the elevator belt is therefore preferably designed in such a way that no gap and / or otherwise no material-free areas are formed between the respective cable and the plastic, which sheathed the corresponding cable side. In other words, it is provided, at least preferably after the immediate production of the Elevator belt, that the plastic rests on the jacket side directly to the rope. This ensures a particularly good power transmission and also prevents excessive wear of the elevator belt. The or each metallic rope of the

Elevator belt, for example, have a diameter between 2 mm and 4 mm. For example, the or each rope may have a diameter of about 3 mm. However, other ropes with larger or smaller diameters are also conceivable for the elevator belt. This is especially determined by the

Intended purpose of the elevator belt. Particularly preferably, the elevator belt is designed as a flat belt. For this purpose, the elevator belt may have a flat and / or at least substantially rectangular cross-section. Other cross sections for a flat belt, however, are

basically also conceivable. The deflection of the plurality of deflection units, which is associated with the drive unit, has an associated pulley, which can also be referred to as a drive roller. The pulleys of the further deflection units can also be referred to as idlers.

An advantageous embodiment of the drive system is characterized in that the drive system has a plurality of sensors. Each of the sensors is in each case assigned to one of the deflection units, so that each of the sensors is designed to detect the structure-borne noise of the respectively associated deflection units. For example, the drive unit may have 2, 3 or 4 sensors. In each case, for example, exactly one of the sensors is assigned in each case only one of the deflection units. Thus, that can

Drive system a plurality, in particular 2, 3 or 4, deflection units, each of which is assigned exactly one sensor. Each of the sensors is for detecting the

Structure-borne noise of the respective associated deflection unit formed. In principle, however, it is also possible that a deflection unit is assigned a plurality of sensors which are designed to detect the structure-borne noise of the associated deflection unit. This may be provided, for example for security reasons, to redundant

To record structure-borne sound signals, which increases the reliability of the sensor signals. An advantageous embodiment of the drive system is characterized in that the drive system comprises a plurality of sensors, which are designed to detect structure-borne noise, wherein at least one of the sensors associated with the deflection, which can be connected to an elevator car, at least one of the sensors with the deflection is coupled, which is encompassed by the drive unit and at least one sensor is associated with the deflection, which with a counterweight of the

Elevator system can be connected. This embodiment ensures particularly advantageous that the sections of the elevator belt are detected, which are under particularly high mechanical load during operation of the elevator system.

A further advantageous embodiment of the drive system is characterized in that the drive belt, in particular as a flat belt, is formed with a plurality of metallic ropes extending parallel in the longitudinal direction of the drive belt, wherein each cable is coated on the side of the plastic of the drive belt such that the Ropes are embedded in the plastic of the drive belt separated from each other. The elevator belt can have, for example, 3, 4, 5, 6, 7, 8, 9, 10 or even further cables. The ropes extend in the longitudinal direction of the elevator belt, parallel to each other. In particular, the ropes are arranged side by side in a transverse direction. This is especially true when the elevator belt is designed as a flat belt. In this case, the ropes are arranged transversely spaced from each other, so that the parallel arrangement of the ropes arises and wherein each of the ropes extends completely in the longitudinal direction. Each of the cables is sheathed on the shell side by the plastic of the elevator belt, so that the cables pass through each

Plastic are separated from each other. This effectively prevents the ropes from rubbing or grinding.

A further advantageous embodiment of the drive belt is characterized in that the cable has a plurality of twisted wires and / or is formed thereof. Each wire is preferably formed as a metallic wire. If the drive belt has a plurality of metallic cables, it is preferably provided that each cable has a plurality of twisted wires or is formed thereof. For example, the or each rope can be 7 have twisted wires. Each of the wires preferably extends over the entire length of the rope. In addition, it can be provided that each wire has a diameter between 0, 1 mm and 4 mm. Investigations have found that the wires of the or each rope rub against each other when they are under high mechanical stress, such as when deflecting around a pulley. This rubbing creates structure-borne noise. The higher the wear of the wires due to friction, the higher the wear of the corresponding rope. In addition, it has been found that the structure-borne noise generated by the wires or the rope is the more intense, the higher the wear of the wires or the rope. Thus, there is a correlation between the degree of wear of the rope and the structure-borne noise emitted by the rope. Is now through the operation of the

Drive system wear of the elevator belt occurred at a section, as this stood, for example, by the repeated deflection of a pulley under high load, this also leads to a corresponding wear of the at least one cable or the associated wires. Will the corresponding section of the

Elevator belt now deflected by a deflection, which is formed a sensor for detecting the structure-borne noise of the corresponding deflection unit, it can be detected by means of the sensor caused by the wires or rope structure-borne sound. This recorded structure-borne noise then reliably provides information about how high the degree of wear of the wires or of the at least one cable of the elevator belt is.

An advantageous embodiment of the drive system is characterized in that the sensor is designed to detect structure-borne noise of the associated deflection unit during operation of the drive system. The same can apply to any sensor associated with a deflection unit. The detection of structure-borne noise by means of the at least one sensor can thus take place during operation of the drive unit. This is particularly advantageous when a section of the elevator belt has a particularly high degree of wear. Because in this case, this section of the elevator belt is not in contact with the diverter at all times. Rather, the section of the elevator belt can only be over a short period of time

Deflection unit to be deflected. The detection of structure-borne noise of this deflection unit During operation of the drive system therefore offers the possibility that the wear, in particular of this section is determined by means of the sensor on the detection of structure-borne noise. This ensures that even sections with a high wear of the elevator belt can be detected, which is advantageous since

in particular, these sections can characterize the overall load of an elevator belt and / or the safety of the elevator belt.

A further advantageous embodiment of the drive belt is characterized in that the sensor is designed for the direct detection of structure-borne noise of the associated deflection unit. The same applies if several sensors are provided for the drive unit. In this case, any sensor for direct detection of a

Structure-borne sound of the respective associated deflection unit to be formed. The direct detection of structure-borne noise by means of the respective sensor offers the advantage that as few disturbing noises disturb the detection of structure-borne noise of the respectively associated deflection unit, which can lead to an increase in the reliability of the corresponding information.

An advantageous embodiment of the drive belt is characterized in that the sensor is attached to the deflection roller of the deflection unit associated with the sensor.

The same applies if several sensors are provided for the drive unit. In this case, each sensor may be attached to the deflection roller of the associated to the respective sensor deflection unit. The or each pulley is partially wrapped by the elevator belt. The diverting pulley is the component of each diverting unit which is located closest to the elevator belt. The structure-borne sound caused by the elevator belt can therefore be detected particularly effectively on the deflection roller by means of the sensor fastened there.

A further advantageous embodiment of the drive system is characterized in that the sensor is attached to a storage rack, a bearing block, a bearing shaft and / or another mechanical part of the deflecting unit associated with the sensor. The same applies to each of the sensors with respect to their respective associated Deflection. Structure-borne noise has the property that it propagates in a solid state. The abovementioned mechanical parts of the deflecting unit can be connected to each other directly or indirectly by non-positive, positive and / or material-locking connections. It is therefore possible to detect the structure-borne noise caused by the drive belt on one of the aforementioned parts of the deflection unit by means of the respective sensor. The arrangement on a non-mechanically rotating part of the associated deflection unit, for example the arrangement of the sensor on a storage rack or a bearing block, offers the advantage that the respective sensor can be electrically connected to an evaluation unit in a particularly simple manner in order to obtain a sensor signal from the respective sensor to the

Transfer evaluation unit.

A further advantageous embodiment of the drive system is characterized in that the or each sensor is designed as a piezoelectric sensor. The

Piezoelectric sensor can be designed to detect structure-borne noise. If such a piezoelectric sensor is connected to a mechanical part of a deflection unit, a structure-borne noise propagating in the deflection unit or in the respective mechanical part can be detected by means of the piezoelectric sensor. A piezoelectric sensor also offers the advantage that it is particularly favorable and at the same time can detect the structure-borne noise particularly precisely.

A further advantageous embodiment of the drive system is characterized in that the or each sensor is designed as a wireless sensor. A wireless sensor offers the advantage that the wireless sensor is preferably designed to transmit a sensor signal to a receiver, for example an evaluation unit, wherein the sensor signal represents the detected structure-borne sound. In this case, it is not necessary for the wireless sensor to be connected to electrical power via electrical lines

Connect terminals of the sensor is. On the other hand, the sensor can be designed without such connections for the transmission of the sensor signal. However, a wireless sensor can be supplied with electrical energy by means of sliding contacts, by means of electromagnetic energy transmission and / or by means of a dynamo principle. The In addition, a wireless sensor can, or alternatively, an energy store for

Storage of energy, by means of which the wireless sensor is fed to detect the structure-borne sound. The energy store may be a battery, an accumulator and / or an electrical capacitor. In particular, the electric capacitor may be advantageous if the wireless sensor is supplied with electrical energy according to a dynamo principle. In this case, the electrical capacitor can ensure that a reliable power source is provided for operating the sensor. A further advantageous embodiment of the drive system is characterized in that the sensor for the indirect detection of structure-borne noise of the associated

Deflection unit is formed. This can apply accordingly to each sensor of an associated deflection unit. However, it is also possible that only one or more of the

Sensors are designed according to the indirect detection. By way of example, this will be explained using one of the sensors. Thus, the sensor for indirect detection of structure-borne noise may be formed, for example, by an optical sensor which is designed for the optical structure-borne noise detection of the associated deflection unit, in particular the deflection roller of the associated deflection unit. If the structure-borne noise is transmitted to the deflecting roller of the deflecting unit and thus also to the entire deflecting unit by the elevator belt, the structure-borne noise propagates in the deflecting unit or in the deflecting roller. This leads to a movement corresponding to the structure-borne sound. This movement can be detected by the optical sensor. In this case, one can speak of an optical structure-borne noise detection. It is advantageous to consider that the structure-borne noise occurs in a predictable frequency spectrum. The sensor for the direct or indirect detection of structure-borne noise may therefore already have a filter which is designed to detect structure-borne noise in a predetermined frequency spectrum. The same can also apply to the optical sensor.

An advantageous embodiment of the drive system is characterized in that the drive system has an evaluation unit. The evaluation unit is coupled to the sensor such that a sensor signal from the sensor to the evaluation unit is transferable. The sensor signal represents a detected structure-borne noise. In addition, the evaluation unit is designed to determine a degree of wear of the elevator belt based on the sensor signal. The degree of wear represents a measure of the wear of the elevator belt. It is particularly preferably provided that each sensor is coupled to the evaluation unit in the manner of the previously explained sensor. In this case, the evaluation unit for determining the degree of wear of the

Elevator belt based on the multiple sensor signals to be formed. Each sensor signal can represent the degree of wear for a corresponding section of the elevator belt, which is detected by means of the respective sensor by measuring the structure-borne sound.

In particular, if only one sensor is provided, the sensor and the

Evaluation unit be designed as an integral unit. In this case, the evaluation unit can be arranged with the sensor in such a way as is provided for the respective sensor. If a plurality of sensors are provided, each of the sensors can be connected to the evaluation unit via corresponding signal connections. For example, each sensor via a wired connection with the

Be coupled evaluation. However, this is not absolutely necessary, because in particular if a sensor is designed as a wireless sensor, it can be provided that the signal connection is established by a wireless signal connection. For this purpose, the evaluation unit can have a wireless communication interface. The same can apply to the wireless sensor. Therefore, a signal connection between the wireless sensor and the evaluation unit can be established by means of the wireless communication interface in order to transmit the corresponding sensor signal to the evaluation unit of the wireless sensor. If there is a wired connection between a sensor and the evaluation unit, the corresponding sensor signal via the wired connection to the

Evaluation unit to be transferred. An advantageous embodiment of the evaluation unit is characterized in that the evaluation unit is configured to receive the structure-borne sound detected by means of the sensor with a previously known structure-borne sound pattern

Compare to the degree of wear of the elevator belt on the basis of the corresponding Determine differences and / or similarities between the recorded structure-borne sound and the previously known structure-borne sound pattern.

A further advantageous embodiment of the drive system is characterized in that the evaluation unit is configured in such a way, a critical condition for the

To determine the elevator belt when the specific degree of wear is greater than or equal to a predetermined limit wear rate. For example, from a certain wear of the elevator belt, which may be represented by the limit wear degree, it is assumed that the elevator belt is in a critical state. The evaluation unit can be used to determine the critical state. The evaluation unit may be designed and / or configured to transmit a corresponding state by means of a signal to a central unit in order to report the corresponding critical state. As a result, appropriate measures can be taken.

According to a second aspect of the invention, the object mentioned at the outset is achieved by an elevator system having the features of claim 13. Thus provided is an elevator system comprising an elevator car for transporting loads and / or persons, and an elevator system, as previously discussed , In this case, at least one of the deflection units of the drive system is connected to the elevator car such that the elevator cage can be conveyed in a conveying direction by driving the elevator belt by means of the drive unit. On the advantageous explanations, preferred features, effects and / or advantages, as have been explained in connection with the drive system and the associated embodiments, reference is made in an analogous manner for the elevator system with particular preference. Thus, if an elevator car of the elevator system is conveyed in the conveying direction by means of a drive system, which now forms part of the elevator system, then the elevator belt of the drive system is driven by the drive unit of the drive system and both

Deflection pulley of the elevator drive of the drive system as well as the deflection roller of the deflection, which is connected to the elevator car, deflected. The drive system has at least one sensor which is assigned to one of the deflection units and to Detecting a structure-borne noise of the corresponding associated deflection unit is formed. It is particularly preferred that the drive system has two sensors. One of the sensors may for example be associated with the deflection unit of the drive unit of the drive system, so that the structure-borne noise of the deflection unit of the drive unit can be detected by means of this sensor. The further sensor can be the

Be associated with deflecting unit, which is connected to the elevator car, so that this sensor can detect the structure-borne noise of the deflection, which is connected to the elevator car. The two deflection units mentioned above were found in investigations as the deflection units, which are particularly high on the elevator belt

Transfer charges. It is therefore an advantage, the two sensors to this

To arrange deflecting units. Because then can be effectively determined by the appropriate detection of structure-borne noise, in which state the elevator belt is. Should there be a particularly high wear of the elevator belt, in particular of the at least one associated cable, then this can be effectively determined by the aforementioned sensors due to the detection of structure-borne noise. This ensures that the elevator system can be operated particularly safely and with particularly long maintenance intervals.

An advantageous embodiment of the elevator system is characterized in that the elevator system has a counterweight, which is thus connected to one of the deflection units, so that the elevator car and the counterweight to each other

cause opposite tensile forces in the elevator belt. The counterweight is connected to a deflection unit of the drive system, which is not formed by one of the deflection units, which is connected to the elevator drive or the elevator car. For the elevator system, it may also be provided that the

Deflection unit, which is connected to the counterweight, also assigned to a (further) sensor of the drive system and / or is connected, so that this sensor also serves to detect the structure-borne noise. Because even on the counterweight can act through the corresponding deflection a high load on the drive belt. The detection of structure-borne noise with the last-mentioned sensor is therefore also of high interest and can also effectively contribute to the detection of the state of the elevator belt.

A further advantageous embodiment of the elevator system is characterized in that the elevator system has a control unit for controlling the elevator system, in particular the drive unit. In this case, the evaluation unit of the drive system can be formed by the control unit. However, it is also possible that the control unit is coupled to the evaluation unit of the drive system in such a way to transmit a status signal from the evaluation unit to the control unit, wherein the status signal

Wear level and / or represents the critical state. Thus, it is possible for the control unit to be provided with the information about the wear state of the elevator belt directly or via the evaluation unit. In addition, the control unit may be configured to generate a warning signal and / or to send it to a higher-level control unit, wherein the warning signal represents a critical state of the elevator belt.

Other features, advantages and applications of the present invention will become apparent from the following description of the embodiments and the figures. All described and / or illustrated features alone and in any combination form the subject matter of the invention, regardless of their composition in the individual claims or their back references. In the figures, the same reference numerals for the same or

Fig. 1 shows an advantageous embodiment of the elevator system in a schematic view.

Fig. 2 shows a first advantageous embodiment of a deflection in a

schematic view.

Fig. 3 shows a further advantageous embodiment of the deflection in one

schematic view.

Fig. 4 shows an end of an elevator belt in a schematic representation, in which the ropes are partially exposed. Fig. 5 shows the end of another embodiment of an elevator belt in a schematic representation in which also the ropes are exposed.

Fig. 6 shows a part of a rope in a schematic cross-sectional view.

FIG. 1 schematically shows a drive system 2 for an elevator system 4. Thus, Figure 1 also schematically illustrates the elevator system 4. For the

Drive system 2, an elevator belt 6 is provided. A first end 22 of the

Elevator belt 6 can be fixed in place. The same can apply to the second end 24 of the elevator belt 6. The drive system 2 has several

Turning 8 on. Each of the deflection units 8 has at least one deflection roller 10. In addition, a drive unit 12 is provided for the drive system 2. One of the deflecting units 8 is assigned to the drive unit 12 and / or at least partially formed by it. The associated deflection roller 10a of the drive unit 12 is coupled to a drive motor of the drive unit 12 in order to drive this deflection roller 10a of the drive unit 12.

Another deflecting unit 8b of the deflecting units 8 is designed to be connected to an elevator car 14 of the elevator system 4. In principle, it may be provided that a plurality of such deflection units 8b are designed to be connected to the elevator car 14. The elevator belt 6 and the deflection rollers 10, 10a, 10b are arranged such that the elevator belt 6 partially wraps around each of the deflection rollers 10, 10a, 10b.

As shown purely by way of example in FIG. 1, a so-called counterweight 26, in the form of a mechanical body, can also be provided for the drive system 2. One of the deflecting units 8 c of the plurality of deflecting units 8 may be designed to be connected to the counterweight 26.

Preferably, the elevator belt 6 and the guide rollers 10, 10a, 10b are arranged such that the elevator belt 6, the guide rollers 10, 10a, 10b wraps around in the manner of a pulley, the elevator belt 6 by means of the guide roller 10a of Drive unit 12 is driven such that the elevator car 14 in the conveying direction and the counterweight 26 is movable in the opposite direction.

The elevator belt 6 has at least one metallic cable 16, as shown schematically in FIGS. 4 and 5 purely by way of example. It is preferably provided that the elevator belt 6 has a plurality of metallic cables 16. In addition, it is preferably provided that the elevator belt 6 is formed as a flat belt. Each of the cables 16 is completely enveloped on the shell side by a plastic 18 of the elevator belt 6, so that each cable is embedded in the plastic 18 of the elevator belt 6. If a plurality of ropes 16 are provided, the ropes 16 are arranged spaced apart in the transverse direction Q of the elevator belt 6, the ropes 16 extending parallel in the longitudinal direction L from the first end 22 to the second end 24.

The drive system 2 has at least one sensor 20. The sensor 20 is shown by way of example and schematically in FIG. FIG. 2 shows an advantageous embodiment of a deflection unit 8 or 8a. Preferably, the sensor 20 is at the

Deflection unit 8, 8a arranged so that the sensor 20 can detect in the deflection unit 8, 8a propagating structure-borne noise. The sensor 20 may be arranged, for example, on or on the deflection roller 10, 10a. It has proven to be advantageous if the sensor 20 is designed as a wireless sensor 20. Because in this case, the sensor 20 can send a sensor signal particularly simple and uncomplicated to an evaluation unit (not shown) of the drive system 2. The sensor signal can represent the recorded structure-borne sound. However, it can also be provided that the sensor 20, as shown schematically by way of example in FIG. 3, is arranged on another mechanical part of the deflection unit 8, 8a. Thus, the sensor 20, for example, on the bearing block 28 of

Deflection unit 8, 8a to be attached. The bearing block 28 may be adapted to be attached, for example, to a wall or ceiling of a building. On the other hand, if the deflecting unit 8, 8a is designed to be fastened to an elevator car 14, the same can also apply to this bearing block 28. In this case can the bearing block 28 may be adapted to be attached to the elevator car 14. The bearing block 28 is preferably connected to a bearing shaft 30, to which in turn the deflection roller 10 is connected. In this case, the bearing shaft 30 and the guide roller 10 may be integrally formed. Due to the mechanical connection between the guide roller 10 and the bearing block 28 via the bearing shaft 30 and the corresponding bearing structure-borne noise can propagate from the guide roller 10 to the bearing block 28, where the structure-borne sound is then detected by the sensor 20.

If structure-borne noise is caused by a worn section of the elevator belt 6, which is deflected by the deflection roller 10, then this is transmitted from the corresponding section of the elevator belt 6 to the deflection roller 10, so that the structure-borne noise can be detected by the sensor 20. Based on the detected

Structure-borne sound can then be provided evaluation algorithms that can determine a state of the elevator belt 6.

As is apparent from Figures 4 and 5, it is particularly preferred that the elevator belt 6 is formed as a flat belt. In addition, it is particularly preferable for the elevator belt 6 to have a plurality of metallic cables 16. Each of the ropes 16 may be formed by a plurality of twisted wires. In this context, reference is made to FIG. 6. FIG. 6 shows a wire 16 in a schematic cross-sectional representation. The wire 16 has a plurality of wire bundles 32. Each of the wire bundles 32 extends from the first end 22 of the elevator belt 6 to the second end 24 of the elevator trim 6. In the example shown in FIG. 6, the cable 16 has seven wire bundles 32. Each of the wire bundles 32 has a plurality of twisted wires 34. For example, a wire bundle 32 may have seven wires 34. Each of the wires 34 extends from the first end 22 of the elevator belt 6 to the other, second end 24 of the elevator belt 6. The wires 34 of a wire bundle 32 are twisted. In addition, the plurality of wire bundles 32 are twisted, so that each of the wires 34 of a wire bundle 32 is twisted to the wires 34 of the other wire bundle 32. The resulting plurality of wires 34 and wire bundles 32 forms a cable 16. The elevator belt 6 may comprise a plurality of cables 16 which are each configured like the previously explained cable 16. If the elevator belt 6 is now deflected at a deflection roller 10, this causes a friction of adjacent wires 34 of the cable 16. In this case, metal dust and / or metal abrasion arising from the wires 34 arise. By rubbing the wires 34 against each other and / or by rubbing with the resulting metal dust and / or metal abrasion, structure-borne noise is caused. The greater the abrasion already produced on the wires 34 or the resulting metal dust, the more intense the structure-borne sound is caused. The intensity of structure-borne noise thus corresponds to the degree of wear of the wires 34 of a cable 16 of the

Elevator belt 6. As explained above, the corresponding structure-borne noise can be detected by means of the at least one sensor 20 in order to be able to make corresponding statements about the condition of the elevator belt 6. It has proven to be particularly advantageous if, for example, two sensors 20 are provided for the drive system 2. A first sensor 20 of these two sensors 20 may be provided for the deflection unit 8b for attachment to the elevator car 14. The other, second sensor 20 of the two sensors 20 may be provided for the deflection unit 8a of the drive unit 12. The corresponding two deflection units 8a, 8b have been found to be particularly advantageous in investigations, since at least the portion region of the elevator belt 6, which is designed for a particularly large load during operation of the elevator system 4, is guided past the two associated deflection rollers 10a, 10b. Furthermore, it can be provided that a sensor 20 is provided on the deflection unit 8c, which serves for attachment to the counterweight 26. Furthermore, it has proven to be advantageous if each deflecting unit 8 is associated with a sensor 20.

In addition, FIG. 1 shows an advantageous embodiment of the elevator system 4. The elevator system 4 comprises the drive system 2, in particular as explained above. In addition, the elevator system 4, the elevator car 14, which is designed for the transport of loads and / or people. In this case, the deflection unit 8b connected to the elevator car 14 such that the elevator car 14 in a

Conveying direction F, in particular a vertical direction, by a driving of the elevator belt 6 by means of the drive unit 12 is conveyed. The previously explained advantageous features, effects and / or advantages, as have been explained in connection with the drive system 2, may apply to the elevator system 4 in a corresponding manner.

In addition, the elevator system 4 may have a counterweight 26. The counterweight 26 is connected to a further deflection unit 8 c, so that the cabin 14 and the counterweight 26 of mutually opposite tensile forces in the

Create elevator belt 6.

In addition, it should be noted that "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. "It should also be noted that features described with reference to any of the above embodiments are also in combination may be used with other features of other embodiments described above, and reference signs in the claims are not intended to be limiting.

Claims

claims

A drive system (2) for an elevator system (4), comprising:

an elevator belt (6),

a plurality of deflection units (8) each having a deflection roller (10), and a drive unit (12) comprising one of the deflection units (8) with the associated deflection roller (10),

wherein the deflection roller (10) of the drive unit (12) is coupled to a drive motor of the drive unit (12) in order to drive the deflection roller (10) of the drive unit (12),

wherein one of the deflecting units (8) is designed to be connected to an elevator car (14) of the elevator system (4),

the elevator belt (6) and the deflection rollers (10) being arranged such that the elevator belt (6) partially wraps around each of the deflection rollers (10),

wherein the elevator belt (6) has at least one metallic cable (16), which is completely enveloped on the shell side by a plastic (18) of the elevator belt (6), so that the at least one cable (16) is embedded in the plastic (18), characterized in that

the drive system (2) has a sensor (20), which is one of the deflection units

(8) is assigned and for detecting a structure-borne noise of the associated

Deflection unit (8) is formed.

2. Drive system (2) according to the preceding claim, characterized in that

the elevator belt (6), in particular as a flat belt, with a plurality of metallic cables (16) extending in parallel in the longitudinal direction L of the elevator belt (6),

wherein each cable (16) of the plastic (18) of the elevator belt (6) is coated on such a jacket side, that the ropes (16) in the plastic (18) of the

Elevator belt (6) are embedded separately from each other. Drive system (2) according to one of the preceding claims, characterized in that

the or each cable (16) is formed by a plurality of twisted wires (34).

Drive system (2) according to one of the preceding claims, characterized in that

the sensor (20) for detecting a structure-borne noise of the associated

Deflection unit (8) during operation of the drive system (2) is formed.

Drive system (2) according to the preceding claim, characterized in that

the sensor (20) for the direct detection of structure-borne noise of the associated

Deflection unit (8) is formed.

Drive system (2) according to one of the preceding claims, characterized

marked that

the sensor (20) on the deflection roller (10) of the sensor (20) associated

Deflection unit (8) is attached.

Drive system (2) according to one of the preceding claims 1 to 2, characterized in that

the sensor (20) is fastened to a storage rack, a bearing block (28), a bearing shaft (30) and / or another mechanical part of the deflection unit (8) associated with the sensor (20).

Drive system (s) according to one of the preceding claims, characterized

marked that

the sensor (20) is designed as a piezoelectric sensor (20).

9. Drive system (2) according to one of the preceding claims, characterized

marked that

the sensor (20) is designed as a wireless sensor (20).

10. Drive system (2) according to one of the preceding claims 1 to 4, characterized in that

the sensor (20) is designed for the indirect detection of structure-borne noise of the associated deflecting unit (8).

11. Drive system (2) according to one of the preceding claims, characterized by

an evaluation unit that is coupled to the sensor (20) such that

Sensor signal from the sensor (20) to the evaluation unit is transferable, wherein the sensor signal represents a detected structure-borne sound, and

wherein the evaluation unit for determining a degree of wear of the

Elevator belt (6) is formed based on the sensor signal,

wherein the degree of wear represents a measure of the wear of the elevator belt (6).

12. Drive system (2) according to the preceding claim, characterized in that

the evaluation unit is configured to have a critical state for the

To determine the elevator belt (6) when the determined degree of wear is greater than or equal to a predetermined level of limit wear.

13. Elevator system (4), comprising:

an elevator car (14) for transporting loads and / or persons, and a drive system (2) according to one of the preceding claims,

wherein at least one of the deflection units (8) of the drive system (2) with the elevator car (14) is connected so that the elevator car (14) in a Conveying direction F by driving the elevator belt (6) by means of

Drive unit (12) is conveyed.

14. elevator system (4) according to the preceding claim, characterized by a counterweight (26) which is so connected to one of the deflecting units (8), so that the elevator car (14) and the counterweight (26) to each other

cause opposite tensile forces in the elevator belt (6).

15. elevator system (4) according to any one of the preceding claims 13 to 14,

marked by

a control unit for controlling the elevator system (4), in particular the

Drive unit (2),

wherein the evaluation unit is formed by the control unit or the control unit is coupled to the evaluation unit in such a way that a status signal from the

Transfer evaluation unit to the control unit, which represents the degree of wear and / or the critical state.