Sensor bar for detecting temperature and / oder temperature changes

Abstract

The present invention relates to a thread-processing machine (200) and a sensor bar (100) for detecting the temperature and / or temperature changes (211) at a spinning point (201) in a thread-processing machine (200), in particular a ring spinning frame (200). The sensor bar (100) comprises a detection unit (110), a connection (130) and a bar (150). The bar (150) is in the form of a common housing (150) for the detection unit (110), which consists of a plurality of infrared sensors (111) for detecting the temperature and / or the temperature changes (211) at a spinning point (201), and for the connection (130), which can be connected to another sensor bar (100) or to the thread-processing machine (200).

Description

[0001] Sensor bar for detecting temperature and / or temperature changes

[0002] Technical area

[0003] The present invention relates to the detection of temperature and temperature changes of a spinning station in a yarn processing machine.

[0004] Technological background

[0005] In ring spinning machines, the spinning ring guides a traveler, which circles a forming bobbin and guides the thread or yarn being wound. In fact, the thread guide section, consisting of straight sections, results in a significantly larger cross-section between the ring and traveler than with a semi-circular guide section. However, this geometry of the guide section with its small radius precisely defines the thread path. This leads to wear on the traveler at the apex radius between the straight sections.

[0006] This wear mechanism depends, among other things, on the interaction between the spinning ring and the traveler it guides. Once the surface of the spinning ring becomes worn, this leads to an increase in the temperature of the spinning ring and / or the traveler. In some cases, this increase in temperature can be an indication of surface loading or friction at the ring-traveler contact point.

[0007] Friction is the main cause of wear, which leads, for example, to changes in the dimensions of the parts, an increase in operating clearance and a deterioration in surface properties.

[0008] Therefore, an increased temperature may mean that significant wear has occurred and / or that the maximum possible running-in speed has been exceeded.

[0009] Accordingly, it is the object of the present invention to detect the temperature of the spinning ring and / or rotor. Summary of the invention

[0010] The object is achieved in whole or in part by the features of the invention. To achieve the object, a sensor strip is proposed for detecting temperature and / or temperature changes at a spinning station in a yarn-processing machine, in particular a ring spinning machine. The sensor strip comprises:

[0011] - a detection unit; the detection unit consists of a plurality of infrared sensors for detecting the temperature and / or temperature changes, each infrared sensor being configured to be arranged opposite a spinning station;

[0012] - a connector; the connector is designed to connect the sensor bar to another sensor bar and / or to the yarn processing machine; and

[0013] - a bar; the bar is designed as a common housing for the detection unit and the connection, and is designed to be attached to a yarn processing machine.

[0014] Advantageously, the sensor bar can detect the temperature and / or temperature changes of a spinning station in a yarn processing machine.

[0015] According to one embodiment, the strip is formed with at least one infrared-permeable window for the radiation to be received by the detection unit.

[0016] According to one embodiment, the infrared-permeable window is designed as an optic.

[0017] Thanks to one of the designs, the sensor bar can absorb infrared radiation.

[0018] According to one embodiment, the strip is provided with fastening means for detachably fastening the sensor strip.

[0019] According to one embodiment, the fastening means is arranged such that it holds the detection unit in a predetermined position relative to the infrared-transparent window. According to one embodiment, the sensor strip can be arranged opposite a spinning station.

[0020] Advantageously, the sensor bar can measure the temperature of a spinning station in a yarn processing machine.

[0021] The object is achieved in whole or in part by the features of the invention. To achieve this object, a yarn processing machine, in particular a ring spinning machine, is proposed. The yarn processing machine comprises:

[0022] - a sensor bar connector; the sensor bar connector is designed to connect the thread-processing machine to the sensor bar according to an embodiment of the present invention; and

[0023] - a central unit; the central unit is suitable for processing the temperature signals generated by the detection unit into a speed control signal from the spinning station.

[0024] Advantageously, the yarn processing machine can detect the temperature and / or temperature changes of a spinning station in a yarn processing machine via the sensor bar.

[0025] According to one embodiment, the central unit has a computing unit for analog-digital conversion of the temperature signals, a memory for storing the temperature and position signals, and a setpoint computer provided with memories for speed programs for generating the speed control signal.

[0026] Advantageously, the thread processing machine can store the temperature and position signals.

[0027] The object is achieved in whole or in part by the features of the invention. To achieve the object, a method is proposed that is implemented by a central unit of a yarn processing machine according to an embodiment of the present invention, wherein the state of the yarn processing machine is detected during spinning operation by continuously detecting its operating temperatures and spindle speeds. Advantageously, the yarn processing machine can detect the state of the yarn processing machine during spinning operation by continuously detecting its operating temperatures and spindle speeds.

[0028] Description of the characters

[0029] The above and other objects, features, aspects and advantages of the invention will become apparent from the following detailed description of the embodiments, which are given by way of illustration and not by way of limitation with reference to the accompanying drawings, in which

[0030] - Figure 1 shows a thread processing machine 200 with a sensor bar 100;

[0031] - Figure 2 shows a detection unit 110 opposite a spinning station 201;

[0032] - Figure 3 shows a sensor bar 100 attached to a thread processing machine 200;

[0033] - Figures 4 & 5 show a sensor bar 100 connected to a thread processing machine 200 and to another sensor bar 100;

[0034] - Figure 6 shows an average temperature of the detected operating temperatures; and,

[0035] - Figure 7 shows a central unit 240 of the thread processing machine 200.

[0036] In the following description of the illustrated embodiments, the same reference numerals are used for features that are identical and / or at least comparable in their design and / or mode of operation, even if they are shown in different embodiments. Unless explained again in detail, their design and / or mode of operation corresponds to the design and mode of operation of the features already described above. Description of an embodiment

[0037] Figure 1 shows a yarn processing machine 200, or a ring spinning machine 200, comprising at least one drafting system and at least one spinning device with a ring rail 255 with a ring 250 and a traveler 210 rotating on the ring 250 and a holder for a spindle, wherein fiber slivers can be positioned below the drafting system and the ring rail 255 such that a fiber sliver can be fed to each drafting system from below, and the ring rail 255 is positioned below the drafting system and encloses the spindle during operation of the ring spinning machine 200, wherein the spindle is received in a hanging manner in the holder for the spindle such that the fiber sliver is guided from bottom to top through the ring spinning machine 200.

[0038] The roving is then drawn by the ring spinning machine 200 and spun into yarn by the movement of the traveler 210, which rotates around the ring 250 and through which the drawn roving is guided, as shown in Figure 2. The movement of the traveler 210 on the ring 250 is induced by the rotation of a sleeve mounted on a spindle onto which the yarn is wound, and at the same time, the temperature 211 of the traveler 210 changes.

[0039] Opposite the spindle or ring 250 is a detection unit 110 of a sensor strip 100, the subject of the invention. As shown in Figure 3, the detection unit 110 consists of a plurality of infrared sensors 111 and can detect the temperature 211 of the spinning ring 250 and / or the traveler 210. Each infrared sensor 111 is configured to be arranged opposite a spinning station 201 or opposite a ring 250. A strip 150, which is designed as a housing 150 for the detection unit 110, can be attached to the yarn processing machine 200. For releasably attaching the sensor strip 100, the strip 150 can additionally have fastening means. The fastening means can hold the detection unit 110 in a predetermined position relative to the infrared-transmissive window 153.As shown in Figure 4, the sensor bar 100 may further include a connector 130 so that the sensor bar 100 can be connected to another sensor bar 100 and / or to the yarn processing machine 200. According to one embodiment, the sensor bar 100 may have multiple connectors 130 adjacent to each other and / or at both ends of the bar 150, as shown in Figure 5.

[0040] In fact, the yarn processing machine 200, in particular a ring spinning machine 200, also comprises a sensor bar connection 230. The sensor bar connection 230 is designed to connect the yarn processing machine 200 to the sensor bar 100 or to several sensor bars 100 according to an embodiment of the present invention.

[0041] During operation, the traveler 210 runs in front of the infrared sensor 111 and radiates its temperature 211 and the temperature of the spinning ring 250 by means of infrared radiation to the infrared sensor 111 of the sensor bar 100. This infrared radiation enters an infrared-transparent window 153 of the sensor bar 100. Depending on the embodiment, the infrared-transparent window 153 can be designed as an optic 155 to receive the infrared radiation from the detection unit 110. The detected temperature and / or detected temperature change 211 from the spinning ring 250 and / or from the traveler 210 are electrically transmitted to a central unit 240 of the yarn processing machine 200, as shown in Figure 7. The central unit 240 has a computing unit 243 for analog-digital conversion of the temperature signals, a memory 247 for storing the temperature and position signals.More specifically, a method implemented by the central unit 240 according to one embodiment can determine the state of the yarn processing machine 200 during spinning operation from the continued detection of the temperature and / or the temperature change 211 of the spinning ring 250 and / or the spindle speeds of the rotor 210. Indeed, the method can determine the spindle speed from the passage of the rotor 210, and the central unit 240 includes a setpoint computer equipped with memory for speed programs. Figure 6 shows a graphical representation of an average temperature of the detected operating temperature. The measurement positions are plotted horizontally, and the corresponding measured values ​​are plotted vertically. A temperature interval 213 for evaluating the individual measured values ​​is indicated by a dashed line.If the ring spinning machine is now put into operation, the setpoint computer calls up the spindle speed program to be run from the memory 247 and controls the spindle drive according to the program.

[0042] To detect the current condition of the runners, the detection unit continuously generates temperature signals corresponding to the measured temperatures 211. The detection unit transmits the supplied measurement signal as an operating temperature signal for the specific spinning station and, via the analog-to-digital converter, in the measured value memory 247 to calculate an average temperature from the measured values ​​for the specific spinning station.

[0043] Operating temperatures 211 above the interval 213 are those which are greater than the average temperature increased by half the interval width.

[0044] Temperature values ​​211 above interval 213 indicate operating conditions that could lead to rotor failure and / or poor material processing, such as quality. As long as the measured temperature 211 does not exceed interval 213, the underlying spindle speed is classified as safe. The setpoint computer then increases the setpoint speed to be run according to the program by a predetermined value and sends a corresponding signal to the spindle drive. If several spinning positions are above interval 213, the setpoint computer reduces the setpoint speed of the spindles by a predetermined amount to return to a safe speed range.

[0045] A further increase in spindle speed occurs either due to the speed program or due to the passage of time. In the first case, the program itself provides a higher speed level; in the second case, the setpoint computer automatically triggers a new detection of the current rotor state with subsequent speed correction.

[0046] This results in an adaptation of the program in terms of maximum possible spindle speeds based on the current state of the rotors, which allows the maximum possible productivity of the spinning machine to be exploited during the running-in process and at the same time avoids the risk of possible later running-in damage and the associated production losses.

Claims

Patent claims 1. Sensor strip (100) for detecting temperature and / or temperature changes (211) of a spinning station (201) in a yarn processing machine (200), in particular a ring spinning machine (200), comprising: - a detection unit (110); the detection unit (110) consists of a plurality of infrared sensors (111) for detecting the temperature and / or temperature changes (211), each infrared sensor (111) being configured to be arranged opposite a spinning station (201); - a connection (130); the connection (130) is designed to connect the sensor bar (100) to another sensor bar (100) and / or to the thread processing machine (200); and - a bar (150); the bar (150) is designed as a common housing (150) for the detection unit (110) and the connection (130), and is designed to be attached to a thread processing machine (200).

2. Sensor strip (100) according to claim 1, wherein the strip (150) is formed with at least one infrared-permeable window (153) for the radiation to be received by the detection unit (110).

3. Sensor strip (100) according to claim 2, wherein the infrared-transparent window (153) is designed as an optic (155).

4. Sensor strip (100) according to one of the preceding claims 1 to 3, wherein the strip (150) is provided with fastening means for releasably fastening the sensor strip (100).

5. Sensor strip (100) according to one of the preceding claims 1 to 4, wherein the fastening means is arranged such that it holds the detection unit (110) in a predetermined position relative to the infrared-transmissive window.

6. A yarn processing machine (200), in particular a ring spinning machine (200), comprising: - a sensor bar connection (230); the sensor bar connection (230) is designed to connect the thread-processing machine (200) to the sensor bar (100) according to one of the preceding claims 1 to 5; and - a central unit (240); the central unit (240) is suitable for processing the temperature signals generated by the detection unit (110) into a speed control signal of the spinning station (201).

7. Thread processing machine (200) according to claim 6, wherein the central unit (240) has a computing unit (243) for analog-digital conversion of the temperature signals, a memory (247) for storing the temperature and position signals, and a setpoint computer provided with memories for speed programs for generating the speed control signal.

8. Method implemented by a central unit (240) of a yarn processing machine (200) according to one of the preceding claims 6 to 7, wherein the state of the yarn processing machine (200) during the spinning operation is monitored by continued detection of its Operating temperatures and their spindle speeds are recorded.

Images