Intelligent monitoring method for hot roller of spinning equipment

Abstract

The invention discloses an intelligent monitoring method for a hot roller of spinning equipment, which comprises the following steps of: in the operation process of the hot roller, acquiring vibration at multiple positions of the hot roller and / or temperature at multiple positions of a hot roller motor, comparing the vibration and the temperature with preset parameters, judging whether the hot roller is abnormal or not and an abnormal reason, and if so, giving an alarm and controlling the hot roller to stop rotating. The vibration of multiple positions of the hot roller and / or the temperature of multiple positions of the hot roller motor are / is monitored, whether vibration and / or temperature of the hot roller are / is abnormal or not is judged by comparing with the preset parameters, if yes, an alarm is given, the hot roller is controlled to stop rotating, and the situation that the waste silk rate is increased due to large difference and non-uniformity of the diameters of fibers caused by too large vibration quantity is avoided. In addition, yarn breakage shutdown caused by overlarge vibration quantity can be avoided, and / or spinning interruption caused by damage of the hot roller due to overhigh temperature can be avoided, a user can perform timely processing when a possible hot roller fault is pre-judged and an alarm is given, long-time shutdown caused by damage of the hot roller can be avoided, loss can be reduced, and stable operation of spinning equipment and continuous production of spinning can be kept.

Description

Technical Field

[0001] The present invention belongs to the field of hot rollers for chemical fiber spinning, and specifically relates to an intelligent monitoring method for the hot roller of a spinning device. Background Art

[0002] The chemical fiber industry is the core support for the stable development and continuous innovation of the textile industry chain and an advantageous industry for China to participate in international competition. The hot roller is a key component in a complete set of chemical fiber spinning equipment. The stable operation of the hot roller ensures the continuous production, stable operation, and high-quality spinning of chemical fiber spinning.

[0003] The hot roller heats, stretches, and shapes the fiber under high-temperature conditions. Excessive vibration of the hot roller will lead to poor spinning quality and even filament breakage, resulting in the interruption of continuous spinning production. During the operation of the hot roller, due to reasons such as the hot roller motor loading work, mechanical friction, and the action of the heater, heat will be generated inside the hot roller and the motor. If the heat dissipation is not smooth and the heat accumulates, resulting in too high a temperature, it will cause motor damage or accidents, affecting the normal continuous production of chemical fiber spinning. Therefore, real-time monitoring of the working state of the hot roller and timely warning are of great significance for ensuring the stable operation of the hot roller. In the prior art, the online monitoring of the hot roller state is limited to conventional parameters such as the surface temperature of the godet wheel and the hot roller speed, mainly for monitoring the requirements of the spinning process. There is a lack of monitoring of the equipment state during the actual operation of the hot roller, and there is no way to achieve fault warning of the hot roller. Once a fault or major abnormality occurs, the spinning equipment will stop for a long time, resulting in high downtime costs.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome at least part of the deficiencies of the prior art, and provide an intelligent monitoring method for the hot roller of a spinning device. By monitoring the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, and comparing with preset parameters to determine whether the hot roller is vibrating and / or the temperature is abnormal. If it is abnormal, an alarm is given and the hot roller is controlled to stop rotating, avoiding the large difference in the wire diameter of the fiber filaments caused by excessive vibration and unevenness, resulting in an increase in the waste filament rate, and also avoiding the filament breakage and shutdown caused by excessive vibration, or, avoiding the interruption of spinning caused by damage due to too high a temperature of the hot roller, predicting possible hot roller failures, and avoiding long-term shutdown of the spinning equipment.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: to provide an intelligent monitoring method for the hot roller of a spinning device, including:

[0007] During the operation of the hot roller, obtain the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, compare with preset parameters, determine whether the hot roller is abnormal and the cause of the abnormality. If it is abnormal, give an alarm and control the hot roller to stop rotating.

[0008] Further, the method includes the following steps: S1. Obtain the radial vibration amount B1 of the wire guide disc of the hot roller, the vibration amount B2 of the motor shaft of the hot roller at the bearing, and the difference ΔB between B1 and B2;

[0009] Compare the obtained vibration amount B1 with a preset value Ba, and compare the obtained ΔB with a preset value ΔBz1; if the vibration amount B1 is greater than the preset value Ba, it is determined that the vibration of the wire guide disc is excessively abnormal, an alarm is given, and the hot roller is controlled to stop rotating; if the difference ΔB is greater than the preset value ΔBz1, it is determined that the operating state of the motor shaft is abnormal, an alarm is given, and the hot roller is controlled to stop rotating.

[0010] Further, in the step S1, the following steps are included:

[0011] S11. Obtain the radial vibration amount B1 of the wire guide disc, and determine whether the obtained vibration amount B1 is greater than the preset value Ba; if so, it is determined that the vibration of the wire guide disc is abnormal, an alarm is given, and the hot roller is controlled to stop rotating; if not, step S12 is executed;

[0012] S12. Obtain the vibration amount B2 of the motor shaft of the hot roller at the bearing and the difference ΔB between B1 and B2, and determine whether ΔB is greater than the preset value ΔBz1; if so, the operating state of the motor shaft is abnormal, an alarm is given, and the hot roller is controlled to stop rotating.

[0013] Further, in the step S12, determine whether ΔB is greater than the preset value ΔBz1; if not, the following steps are executed:

[0014] S13. Determine whether ΔB is less than or equal to ΔBz1 and greater than or equal to ΔBz2; if so, calibrate the abnormal operation flag Feb of the motor shaft and do not give an alarm; if not, the hot roller operates normally, where ΔBz1 > ΔBz2.

[0015] Further, the wire guide disc is sleeved outside part of the motor shaft and is connected to the axial end of the motor shaft;

[0016] In the step S1, the radial vibration amount B1 of the wire guide disc is obtained by obtaining the radial vibration amount at the connection between the wire guide disc and the axial end of the motor shaft; the vibration amount B2 is obtained by obtaining the radial vibration amount of the motor shaft between the front bearing and the rear bearing;

[0017] Preferably, within a preset time, 2N detected vibration amounts B1 and B2 are obtained, and the arithmetic mean of the N medians in the middle is taken as the effective vibration amounts B1 and B2.

[0018] Further, the front bearing and the rear bearing are arranged at intervals and sleeved outside the motor shaft, and the front bearing is arranged close to the wire guide disc;

[0019] The monitoring method further includes the following steps, or, in the step S1, if it is determined that there is no abnormality in the hot rollers, then the following steps are executed:

[0020] S2. Obtain the temperature T1 at the connection between the motor shaft and the godet wheel, the temperature T2 at the front bearing of the hot roller motor shaft, and the temperature T3 at the rear bearing of the hot roller motor shaft; determine whether the obtained temperature T1 is greater than the preset value Ta1, and / or whether the obtained temperature T2 is greater than the preset value Ta2, and / or whether the obtained temperature T3 is greater than the preset value Ta3, and / or whether the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2;

[0021] If the obtained temperature T1 is greater than the preset value Ta1, it is determined that the temperature inside the heater of the hot roller is too high, an alarm is given, and the hot roller is controlled to stop heating; if the obtained temperature T2 is greater than the preset value Ta2, it is determined that the temperature of the motor shaft at the front bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than the preset value Ta3, it is determined that the temperature of the motor shaft at the rear bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2, it is determined that the temperature of the motor shaft at the rear bearing is abnormal and an alarm is given.

[0022] Further, in the step S2, if all the judgments are negative, then the following steps are executed:

[0023] S3. Obtain the difference ΔT between T2 and T3, and determine whether ΔT is less than or equal to the preset value ΔTz1, and whether T3 is greater than or equal to the preset value Tc, where 0 < ΔTz1 and 0 < Tc < Ta3; if any of the judgment results is yes, then determine whether the flow rate of the cooling system of the hot roller has reached the upper limit. If so, it is determined that the temperature of the hot roller motor is abnormal and a warning is given but no alarm is made. If not, the flow rate of the cooling system of the hot roller is increased; if ΔT is greater than the preset value ΔTz1, it is determined that the temperature of the motor shaft at the front bearing is abnormal and an alarm is given.

[0024] Preferably, if ΔT is less than or equal to the preset value ΔTz1 and the flow rate of the cooling system of the hot roller has reached the upper limit, it is determined that the temperature of the motor shaft at the front bearing is abnormal and a warning is given but no alarm is made; if T3 is greater than or equal to the preset value Tc and the flow rate of the cooling system of the hot roller has reached the upper limit, it is determined that the temperature of the motor shaft at the rear bearing is abnormal and a warning is given but no alarm is made.

[0025] Further, in the step S3, the method for obtaining whether the flow rate of the cooling system of the hot roller has reached the upper limit includes:

[0026] Obtain the loop flow rate Q1 in the cooling system pipeline at the tail of the hot roller motor, compare the obtained flow rate Q1 with the preset value Qx and the preset value Qs. If the obtained flow rate Q1 is greater than the preset value Qs, it is determined that the flow rate upper limit of the hot roller cooling system is reached; if the obtained flow rate Q1 is less than the preset value Qx, it is determined that the hot roller cooling system is abnormal, and control the hot roller to stop heating and rotating, where Qx < Qs.

[0027] Further, in the step S3, determine whether ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, where ΔTz2 < ΔTz1. If so, obtain whether the flow rate of the hot roller cooling system reaches the upper limit and whether the motor shaft vibration is abnormal.

[0028] If the flow rate reaches the upper limit, it is determined that the temperature of the motor shaft at the front bearing is abnormal, and a warning is given without an alarm; if the flow rate does not reach the upper limit, increase the flow rate of the hot roller cooling system; if the motor shaft vibration is abnormal, it is determined that the motor state is abnormal, and an alarm is given.

[0029] Further, in the step S3, when ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, first obtain whether the motor shaft vibration is abnormal. If so, it is determined that the motor state is abnormal and an alarm is given; if not, obtain whether the flow rate of the hot roller cooling system reaches the upper limit. If so, it is determined that the temperature at the front bearing is abnormal, and a warning is given without an alarm; if not, increase the flow rate of the hot roller cooling system.

[0030] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0031] (1) The present invention provides a method for intelligent monitoring of a hot roller of a spinning device. By monitoring the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, it is determined whether the hot roller vibrates and / or the temperature is abnormal by comparing with preset parameters. If it is abnormal, an alarm is given and the hot roller is controlled to stop rotating, avoiding large vibration amounts resulting in significant differences in the wire diameters of the fiber filaments, unevenness leading to an increase in the waste filament rate, and also avoiding large vibration amounts resulting in filament breakage and machine shutdown, and / or, avoiding the spinning interruption caused by damage due to excessive hot roller temperature. Predicting possible hot roller failures and giving an alarm allows users to handle them in a timely manner, which can avoid long-term shutdowns due to hot roller damage and reduce losses, maintaining the stable operation of the spinning device and continuous spinning production.

[0032] (2) The present invention determines whether the radial vibration quantity B1 of the guide wire disc is greater than a preset value Ba. If so, it indicates that the radial vibration of the guide wire disc is abnormal, there is damage and the spinning equipment stops, then an alarm is given to remind the user to handle the hidden danger in time; by obtaining the difference ΔB between the vibration quantities at the guide wire disc and the bearing, if the difference ΔB is greater than the preset value ΔBz1, the vibration quantities at the guide wire disc and the bearing are quite different, it is determined that the operating state of the motor shaft is abnormal, the user is reminded to handle the hidden danger in time, an alarm is given and the hot roller is controlled to stop rotating; all of the above can avoid the damage caused by the long-term abnormality of the hot roller, thus causing the long-term shutdown of the spinning equipment.

[0033] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts. In the drawings:

[0035] Figure 1 is a flowchart of a method for intelligent monitoring of a hot roller of a spinning equipment according to the present invention;

[0036] Figure 2 is a flowchart of another method for intelligent monitoring of a hot roller of a spinning equipment according to the present invention;

[0037] Figure 3 is a detailed flowchart of a method for intelligent monitoring of a hot roller according to the present invention;

[0038] Figure 4 is a flowchart of a method for obtaining whether the flow rate of a hot roller cooling system reaches the upper limit according to the present invention;

[0039] Figure 5 is a schematic diagram of an intelligent detection device for a hot roller according to the present invention;

[0040] Figure 6 is a schematic diagram of an intelligent detection device for a hot roller according to the present invention;

[0041] Figure 7 is a schematic diagram of an intelligent detection device for a hot roller according to the present invention;

[0042] Figure 8 is a schematic diagram of the structure of a hot roller according to the present invention;

[0043] Figure 9 is a cross-sectional schematic diagram of a partial structure of a hot roller according to the present invention.

[0044] In the figure: 1. Frame; 2. Motor; 21. Motor shaft; 211. Groove; 22. Motor housing; 23. Rear bearing; 24. Connecting part; 25. Front bearing; 3. Wire guiding disc; 4. Wire guiding disc sheath; 5. Heating module; 61. Signal transmission unit; 62. Signal processing unit; 71. First vibration sensor; 72. Second vibration sensor; 73. First temperature sensor; 74. Second temperature sensor; 75. Third temperature sensor.

[0045] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] As Figures 1 to 4 shown, the present invention provides a method for intelligent monitoring of a hot roller of a spinning device. The hot roller of the spinning device can be heated, and the surface temperature is uniform. It is used for heating, winding fiber filaments and pulling fiber filaments, such as draw rollers, drying rollers, etc.

[0050] The method for intelligent monitoring of the hot roller includes: during the operation of the hot roller, obtaining the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, comparing them with preset parameters, judging whether the hot roller is abnormal and the cause of the abnormality, and if it is abnormal, giving an alarm and controlling the hot roller to stop rotating.

[0051] The present invention provides a method for intelligent monitoring of a hot roller of a spinning device. By monitoring the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, it is determined whether the hot roller vibrates and / or the temperature is abnormal by comparing with preset parameters. If it is abnormal, an alarm is given and the rotation of the hot roller is controlled to stop, avoiding a large difference in the filament diameter caused by excessive vibration and unevenness, which increases the waste filament rate, and also avoiding filament breakage and shutdown due to excessive vibration, and / or avoiding the interruption of spinning caused by damage due to too high a temperature of the hot roller. When a possible hot roller failure is predicted and an alarm is given, the user can handle it in time, which can avoid long-term shutdown due to hot roller damage and reduce losses, maintain the stable operation of the spinning device and continuous production of spinning.

[0052] The hot roller includes a motor, a bearing, a heater, and a wire guiding disc. The motor includes a motor body and a motor shaft, and the motor shaft extends to the outside of the motor body. The wire guiding disc is sleeved on the outside of a part of the motor shaft of the motor and is connected to the axial end of the motor shaft and rotates driven by the motor shaft. The heater is used to heat the wire guiding disc to keep the outer surface of the wire guiding disc at a certain temperature. The bearing is arranged on the outside of another part of the motor shaft of the motor and is arranged closer to the motor body than the wire guiding disc.

[0053] If the vibration of the hot roller is too large, especially the radial vibration is too large, it will cause uneven thickness of the fiber filaments and poor product quality, and will directly cause the fiber filaments to break, requiring the spinning device to stop and resume threading, seriously increasing the production cost. There are many reasons for excessive vibration and targeted treatment is needed.

[0054] The method for intelligent monitoring of the hot roller includes the following steps:

[0055] S1. Obtain the radial vibration amount B1 of the wire guiding disc of the hot roller, the vibration amount B2 of the motor shaft of the hot roller at the bearing, and the difference ΔB between B1 and B2, that is, calculate ΔB = B1 - B2;

[0056] Compare the obtained vibration amount B1 with a preset value Ba, and compare the obtained ΔB with a preset value ΔBz1; if the vibration amount B1 is greater than the preset value Ba, it is determined that the vibration of the wire guiding disc is too large and abnormal, an alarm is given and the rotation of the hot roller is controlled to stop. If the difference ΔB is greater than the preset value ΔBz1, it is determined that the operating state of the motor shaft is abnormal, an alarm is given and the rotation of the hot roller is controlled to stop.

[0057] The present invention determines whether the radial vibration amount B1 of the wire guiding disc is greater than a preset value Ba. If so, it indicates that the radial vibration of the wire guiding disc is abnormal, there is damage and the spinning equipment may stop, then an alarm is given to remind the user to handle the potential hazard in time; by obtaining the difference ΔB between the vibration amounts at the wire guiding disc and the bearing, if the difference ΔB is greater than the preset value ΔBz1, the vibration amounts at the wire guiding disc and the bearing are quite different, it is determined that the operating state of the motor shaft is abnormal, the user is reminded to handle the potential hazard in time, an alarm is given and the hot roller is controlled to stop rotating; all of the above can avoid the damage caused by the long-term abnormality of the hot roller, thus avoiding the long-term shutdown of the spinning equipment.

[0058] In the step S1, the following steps are included:

[0059] S11. Obtain the radial vibration amount B1 of the wire guiding disc, and determine whether the obtained vibration amount B1 is greater than the preset value Ba. If so, it is determined that the vibration of the wire guiding disc is abnormal, an alarm is given and the hot roller is controlled to stop rotating; if not, step S12 is executed;

[0060] S12. Obtain the vibration amounts B2 at the bearing of the motor shaft of the hot roller and the difference ΔB between B1 and B2, and determine whether ΔB is greater than the preset value ΔBz1. If so, the operating state of the motor shaft is abnormal, an alarm is given and the hot roller is controlled to stop rotating.

[0061] Since the fiber filaments are wound on the outer surface of the wire guiding disc of the hot roller for pulling or drying, etc., if the radial vibration of the wire guiding disc is too large, it will directly cause the fiber filaments being conveyed to fluctuate too much and the problem of filament breakage and interruption.

[0062] Therefore, the present invention first obtains the radial vibration amount B1 of the wire guiding disc, and determines whether the obtained vibration amount B1 is too large. If it is too large and abnormal, the connection between the motor shaft and the wire guiding disc is abnormal or the vibration is abnormal, there is a risk of damage to the hot roller or filament breakage and shutdown. Step S11 first eliminates the problem of excessive abnormal vibration of the wire guiding disc; when the vibration amount B1 of the wire guiding disc is not too large, then further determine the difference ΔB between the radial vibration amount B1 of the wire guiding disc and the vibration amount B2 at the bearing of the motor shaft, and determine whether the vibration at other parts of the hot roller is abnormal. If the difference ΔB is greater than the preset value ΔBz1, and the judgment in step S11 shows that the vibration at the connection between the motor shaft and the wire guiding disc is normal, it indicates that there is an abnormality in the operation of other parts of the motor shaft, an alarm is given and the hot roller is controlled to stop rotating, and step S12 can further eliminate the risk of failure.

[0063] Further, in the step S12, determine whether ΔB is greater than the preset value ΔBz1. If not, execute the following steps:

[0064] S13. Determine whether ΔB is less than or equal to ΔBz1 and greater than or equal to ΔBz2. If so, calibrate the abnormal operation flag Feb of the motor shaft and do not give an alarm; if not, the hot roller operates normally, where ΔBz1 > ΔBz2.

[0065] When the difference ΔB is less than or equal to the preset value ΔBz1, although the hot roller is normal, there is still a certain vibration in the motor of the hot roller. Then, continue to determine whether ΔB is less than or equal to ΔBz1 and greater than or equal to ΔBz2. If so, but the hot roller has not reached the abnormal state, no alarm is given, and only calibration is performed to calibrate the abnormal operation flag Feb of the motor shaft.

[0066] The bearing includes a front bearing and a rear bearing arranged at intervals. The other end of the motor shaft is rotatably supported in the front bearing and the rear bearing, where the front bearing is arranged close to the wire guiding disc and the rear bearing is arranged close to the motor body.

[0067] In the step S11, the radial vibration amount B1 of the wire guiding disc is obtained by acquiring the radial vibration amount at the axial end connection of the detected wire guiding disc and the motor shaft.

[0068] In the step S12, the vibration amount B2 is obtained by acquiring the radial vibration amount of the motor shaft between the front bearing and the rear bearing. It can be the radial vibration amount at the middle position of the motor shaft between the front bearing and the rear bearing, or the average value of the vibration amounts of the motor shaft at the front bearing and the rear bearing.

[0069] Preferably, within a preset time, 2N detected vibration amounts B1 and B2 are acquired, N / 2 highest values and N / 2 lowest values are removed, and the arithmetic average of the N median values in the middle is taken as the effective vibration amounts B1 and B2.

[0070] The present invention can detect the vibration amount of the hot roller through a vibration sensor. It can acquire 2N vibration amounts B1 and B2 of the motor shaft of the hot roller through real-time detection, or can acquire a vibration amount B1 or B2 at the same or different intervals, and acquire 2N vibration amounts B1 and B2 within a preset time.

[0071] The quantity N is an integer greater than or equal to 2. Preferably, the N is an integer greater than or equal to 4 and less than or equal to 50.

[0072] Furthermore, the front bearing and the rear bearing are arranged at intervals and sleeved outside the other part of the motor shaft support, and the front bearing is arranged close to the wire guiding disc.

[0073] The hot roller intelligent monitoring method further includes a step S2 (not shown in the figure), or, as Figures 2 to 3 shown, in the step S1, if it is determined that the hot roller is normal, then step S2 is executed. That is, step S1 and step S2 can be executed simultaneously, or step S1 can be executed first, and then step S2 is executed after determining that there is no abnormality.

[0074] S2. Obtain the temperature T1 at the connection between the motor shaft and the wire guiding disc, the temperature T2 at the front bearing of the hot roller motor shaft, and the temperature T3 at the rear bearing of the hot roller motor shaft; determine whether the obtained temperature T1 is greater than the preset value Ta1, and / or whether the obtained temperature T2 is greater than the preset value Ta2, and / or whether the obtained temperature T3 is greater than the preset value Ta3, and / or whether the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2; the preset values Ta1, Ta2, and Ta3 are all less than the actual damage temperature of the hot roller at the corresponding locations.

[0075] Since the wire guiding disc is heated by heating, the wire guiding disc is connected to the motor shaft and not connected to bearings, etc. If the temperature T1 at the connection is greater than the preset value Ta1, it is determined that the temperature inside the heater of the hot roller is too high, a fault can be predicted, an alarm is given, and the hot roller is controlled to stop heating. At this time, the hot roller can rotate to reduce the temperature, and the spinning equipment can continue to operate.

[0076] If the obtained temperature T2 is greater than the preset value Ta2, it is determined that the temperature of the motor shaft at the front bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than the preset value Ta3, it is determined that the temperature of the motor shaft at the rear bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating. When the temperature of the motor shaft at the front bearing and the rear bearing is higher than the preset value, an alarm is given, a possible fault can be predicted, and the machine is stopped for maintenance to avoid damage to the hot roller and long-term shutdown of the spinning equipment caused by the damage of the hot roller.

[0077] Since the rear bearing is arranged close to the motor body, generally, the temperature of the motor shaft at the rear bearing is less than the temperature of the motor shaft at the front bearing or at the connection with the wire guiding disc. If the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2, it is determined that the temperature of the motor shaft at the rear bearing is abnormal, an alarm is given, and the detection scheme is further improved to improve the monitoring accuracy of the hot roller.

[0078] Preferably, in the step S1, if it is determined that the hot roller is normal, then step S2 is executed.

[0079] More preferably, in the step S2, the following steps are included:

[0080] S21. Obtain the temperature T1 at the connection between the motor shaft and the wire guiding disc, the temperature T2 at the front bearing of the hot roller motor shaft, and the temperature T3 at the rear bearing of the hot roller motor shaft; determine whether the obtained temperature T1 is greater than the preset value Ta1, whether the temperature T2 is greater than the preset value Ta2, and whether the temperature T3 is greater than the preset value Ta3. If the obtained temperature T1 is greater than the preset value Ta1, it is determined that the inside of the heater of the hot roller is overheated, an alarm is given, and the hot roller is controlled to stop heating; if the obtained temperature T2 is greater than the preset value Ta2, it is determined that the temperature of the motor shaft at the front bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than the preset value Ta3, it is determined that the temperature of the motor shaft at the rear bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if all are no, then execute step S22;

[0081] S22. Determine whether the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2. If so, it is determined that the temperature of the motor shaft at the rear bearing is abnormal and an alarm is given.

[0082] Step S22 is a supplement when no abnormalities are found in the judgments of step S2, and it monitors and judges whether there are any abnormalities.

[0083] The first temperature sensor at the connection between the hot roller motor shaft and the wire guiding disc detects and obtains the temperature T1. After obtaining 2N detection values, the highest and lowest N detection values are removed, and the arithmetic mean of the N medians is obtained to obtain the effective value temperature T1;

[0084] The second temperature sensor at the front bearing of the hot roller motor shaft detects and obtains the temperature T2. After obtaining 2N detection values, the highest and lowest N detection values are removed, and the arithmetic mean of the N medians is obtained to obtain the effective value temperature T2;

[0085] The third temperature sensor at the rear bearing of the hot roller motor shaft detects and obtains the temperature T3. After obtaining 2N detection values, the highest and lowest N detection values are removed, and the arithmetic mean of the N medians is obtained to obtain the effective value temperature T3. N is an integer greater than or equal to 2. Preferably, N is an integer greater than or equal to 4 and less than or equal to 50.

[0086] Specifically, the vibration sensor and the temperature sensor are installed inside the hot roller motor shaft.

[0087] A groove is provided on the motor shaft of the hot roller, axially extending to both axial ends of the motor shaft. The vibration sensor and the temperature sensor are installed in the groove, facilitating the communication line connected to the sensor to extend and be routed along the groove and connected to external devices, avoiding wear of the communication line during the rotation of the motor shaft. The structure is simple and the installation is convenient, avoiding interruption of the detection data transmission.

[0088] Further, in step S2, if the judgments are all no, at this time, although T3 is less than T1 and T3 is less than T2, there may be other abnormalities, then execute the following steps:

[0089] S3. Obtain the difference ΔT between T2 and T3, i.e., ΔT = T2 - T3; determine whether ΔT is less than or equal to a preset value ΔTz1 and whether T3 is greater than or equal to a preset value Tc, where 0 < ΔTz1 and 0 < Tc < Ta3;

[0090] If any of the determination results is yes, obtain whether the flow rate of the cooling system of the hot roller has reached the upper limit. If so, determine that the temperature of the hot roller motor is abnormal, give an early warning but do not alarm. If not, increase the flow rate of the cooling system of the hot roller, reduce the temperature of the hot roller motor, maintain the normal operation of the hot roller, and ensure the continuity of spinning; if ΔT is greater than the preset value ΔTz1, determine that the temperature of the motor shaft at the front bearing is abnormal and alarm.

[0091] Preferably, in step S22, if not, that is, when T3 is less than T1 and T3 is less than T2, then execute step S3.

[0092] In the said step S3, determine whether T3 is greater than or equal to the preset value Tc. If so, that is, Tc ≤ T ≤ Ta3, then execute the following steps: when obtaining whether the flow rate of the cooling system of the hot roller has reached the upper limit, if so, determine that the temperature of the motor shaft at the rear bearing is abnormal, give an early warning but do not alarm; if not, increase the flow rate of the cooling system of the hot roller, reduce the temperature of the motor shaft of the hot roller at the rear bearing, and then re - execute step S2 or step S1 to continue monitoring the temperature and / or vibration of the hot roller.

[0093] In the said step S3, determine whether ΔT is less than or equal to the preset value ΔTz1. If not, determine that the temperature of the motor shaft at the front bearing is abnormal and alarm; if so, then execute the following steps:

[0094] When obtaining whether the flow rate of the cooling system of the hot roller has reached the upper limit, if so, determine that the temperature of the motor shaft at the front bearing is abnormal, give an early warning but do not alarm; if not, increase the flow rate of the cooling system of the hot roller, reduce the temperature of the motor shaft of the hot roller at the front bearing, and then re - execute step S2 or step S1 to continue monitoring the temperature and / or vibration of the hot roller.

[0095] The judgment conditions in step S3 can be judged simultaneously, or first determine whether T3 is greater than or equal to the preset value Tc. After determining no abnormality, then determine whether ΔT is less than or equal to the preset value ΔTz1. Preferably, it is judged synchronously.

[0096] Specifically, in the said step S3, determine whether ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, where ΔTz2 < ΔTz1. If so, then execute the following steps:

[0097] Obtain whether the flow rate of the cooling system of the hot roller reaches the upper limit and whether there is any abnormality in the vibration of the motor shaft. If the flow rate of the cooling system reaches the upper limit, it is determined that the temperature of the motor shaft is abnormal at the front bearing, and a warning is given without an alarm. If the flow rate of the cooling system does not reach the upper limit, the flow rate of the hot roller cooling system is increased. If the vibration of the motor shaft is abnormal, it is determined that the motor state is abnormal and an alarm is given.

[0098] Preferably, in step S3, when ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, first obtain whether the vibration of the motor shaft is abnormal. If there is no abnormality, then determine whether the flow rate of the cooling system of the hot roller reaches the upper limit.

[0099] In the above steps, the method for obtaining whether the vibration of the motor shaft is abnormal includes the following steps:

[0100] Obtain whether the abnormal operation flag Feb of the motor shaft is calibrated in the judgment result of step S13. If so, the vibration of the motor shaft is abnormal. If not, the vibration of the motor shaft is normal.

[0101] As Figure 4 shown, the method for obtaining whether the flow rate of the cooling system of the hot roller reaches the upper limit includes the steps:

[0102] Sa. Obtain the loop flow rate Q1 in the cooling system pipeline at the tail of the hot roller motor, and compare the obtained flow rate Q1 with the preset values Qx and Qs. If the obtained flow rate Q1 is greater than the preset value Qs, it is determined that the flow rate of the cooling system of the hot roller reaches the upper limit, and the cooling system flow rate upper limit flag Fsq is calibrated. If the obtained flow rate Q1 is less than the preset value Qx, it is determined that the cooling system of the hot roller is abnormal, and the hot roller is controlled to stop heating and rotating. If the obtained flow rate Q1 is greater than or equal to the preset value Qx and less than or equal to Qs, the cooling system of the hot roller operates normally; where Qx < Qs, Qx is the preset lower flow rate value, and Qs is the preset upper flow rate value.

[0103] Alternatively, the above step Sa is also included between step S1 and step S2.

[0104] Specifically, when it is determined in step S1 that there is no abnormality, then step Sa is executed. When it is determined in step Sa that the cooling system is normal (that is, including both the case of reaching the flow rate upper limit and normal operation), then step S2 is executed. In step S3, obtain whether there is a cooling system flow rate upper limit flag Fsq. If so, the flow rate of the cooling system of the hot roller reaches the upper limit. If not, the flow rate of the cooling system of the hot roller does not reach the upper limit.

[0105] Preferably, in steps S1 to S3, when an alarm is given, a sound and light safety alarm is issued. When a warning is given, the monitored information data and warning content can be displayed on the display terminal, and no sound and light safety alarm is issued.

[0106] AsFigures 5 to 9 As shown in the figure, the present invention provides a thermal roll intelligent monitoring device. By adopting the above-mentioned thermal roll intelligent monitoring method, it can detect the thermal roll during the spinning process and avoid the interruption of spinning production caused by the damage of the thermal roll.

[0107] The thermal roll intelligent detection device includes a thermal roll, a detection module, a controller and an alarm module.

[0108] The detection module is arranged on the motor shaft 21 of the thermal roll and is used to detect the vibration during the operation of the thermal roll and / or the temperature of the motor shaft 21. The controller is connected to the detection module and is used to judge whether it exceeds the normal range after obtaining the detection data, and issue an alarm instruction when it exceeds the normal range. The alarm module is communicatively connected to the controller and is used to receive the instruction of the controller to give an alarm.

[0109] For the thermal roll intelligent monitoring device of the present invention, the detection module detects the vibration of the thermal roll and / or the temperature of the motor shaft 21 and transmits it to the controller. When the controller judges that the detection data exceeds the normal range, it issues an alarm instruction to the alarm module, and the alarm module gives an alarm to remind the user to check the operation status and structure of the thermal roll in time, avoid the large vibration of the thermal roll affecting the quality of the finished fiber, or avoid the motor 2 being damaged due to too high temperature, resulting in the interruption of the spinning production line, realizing the real-time intelligent monitoring of the thermal roll during the spinning production process, predicting the possible motor 2 faults in advance, and maintaining the thermal roll in time to ensure the stable operation of the thermal roll, so that the chemical fiber spinning can be continuously produced.

[0110] Preferably, the alarm module includes an audible and visual alarm device to give an alarm at the spinning site to prompt the staff to timely discover the hidden problems of the thermal roll and handle the faults.

[0111] As Figure 6 shown, the thermal roll intelligent detection device further includes a display module. The display module is communicatively connected to the controller and is used to display the judgment result of the controller, enabling the staff to timely detect the operation status and partial structure status of the thermal roll. The monitoring device of the present invention has a simple structure and is convenient to operate, can online monitor the operation status of the thermal roll, and has the advantages of real-time monitoring and fault early warning.

[0112] The display module includes a first display unit and a second display unit.

[0113] The first display unit is communicatively connected to the controller and is used to display the judgment result of a single thermal roll. At the spinning production site, there can be multiple independent first display units.

[0114] The second display unit is wirelessly communicatively connected to the controller and is used to integrally display the judgment results of multiple thermal rolls. The second display unit includes a tablet computer and a mobile phone client.

[0115] For the intelligent monitoring device of the hot roll described in the present invention, the display module and the alarm module are diversified. Not only are terminals deployed at the production site, but remote monitoring is also possible, saving time and effort, and being convenient and fast.

[0116] Detecting the vibration of the hot roll includes the vibration of the hot roll in the radial and / or axial directions. Since the vibration in the radial direction of the hot roll greatly affects the vibration and quality of spinning, it is also possible to only detect the vibration in the radial direction of the hot roll.

[0117] Preferably, the detection device is installed inside the motor shaft 21 of the hot roll.

[0118] For the intelligent monitoring device of the hot roll described in the present invention, through the detection module for detecting temperature and vibration installed inside the motor shaft 21, the temperature and vibration amount of the motor shaft 21 are measured in real time and accurately. By pre-storing a preset range in the monitoring device, potential faults in the operation of the motor 2 can be detected and warned in a timely manner. The structure is simple, the operation is convenient, and the performance and reliability of the monitoring device are improved.

[0119] As Figure 7 shown, the controller includes a signal transmission unit 61, a signal processing unit 62, and a comparison unit.

[0120] The signal transmission unit 61 is arranged on the motor shaft 21 and is connected to the detection module for receiving the detection signal of the detection module.

[0121] The signal processing unit 62 is arranged on the hot roll and is wirelessly communicatively connected to the signal transmission unit 61 for receiving the detection signal and converting and processing it into detection data.

[0122] The comparison unit is connected to the signal processing unit 62 for receiving the detection data and comparing it with the preset range, and sending an alarm instruction to the alarm module when the preset range is exceeded.

[0123] In the present invention, by arranging the signal transmission unit 61 on the motor shaft 21 to receive the detection signal of the detection module and wirelessly transmitting it to the external signal processing unit 62, and then transmitting it to the comparison unit for processing, it is possible to avoid the communication line connection between the detection unit and the comparison unit outside the motor shaft 21, resulting in the rotation of the motor shaft 21 during the operation of the hot roll, causing the communication line to be wound and damaged, and being able to maintain the reliable transmission of detection data and avoid the interruption of hot roll monitoring.

[0124] Preferably, when the comparison unit compares the detection data with the preset range, it also compares it with a preset safety range. If it is lower than the preset range, the alarm module is not controlled to alarm; if it exceeds the preset range but is within the safety range, the alarm module is controlled to display a warning signal without performing an audible and visual alarm; if it exceeds the preset range and the safety range, the alarm module is controlled to perform an audible and visual alarm. Among them, the preset safety range is higher than the preset range.

[0125] The signal transmission unit 61 receives the original temperature signal and / or vibration signal detected by the detection module, and modulates and transforms the detected original temperature signal and / or vibration signal into a temperature signal and / or vibration signal whose frequency band is suitable for channel transmission. The signal transmission unit 61 is wirelessly communicatively connected to the signal processing unit 62, and then the signal transmission unit 61 wirelessly transmits the modulated temperature signal and / or vibration signal to the signal processing unit 62. The signal processing unit 62 converts the modulated temperature signal and / or vibration signal into a temperature and / or vibration measurement value.

[0126] The comparison unit is connected to the signal processing unit 62, receives the temperature and / or vibration measurement value of the signal processing unit 62, and compares it with a preset range and a preset safety range pre-stored internally or obtained remotely.

[0127] As Figure 8 shown, a groove 211 is provided on the motor shaft 21, and the detection module is arranged in the groove 211.

[0128] The signal transmission unit 61 is arranged on the motor shaft 21 and rotates coaxially with the detection module along with the motor shaft 21.

[0129] Furthermore, one end of the motor shaft 21 in the axial direction is provided with a connecting portion 24, and the signal transmission unit 61 is arranged on the connecting portion 24. The groove 211 extends axially along the motor shaft 21 to the connecting portion 24, and the detection module is connected to the signal transmission unit 61 through a circuit arranged in the groove 211.

[0130] In the present invention, by providing a groove 211 on the motor shaft 21 of the hot roll and extending it to the connecting portion 24 at one end in the axial direction of the motor shaft 21, it is convenient to arrange a communication line from the detection module in the groove 211 to the signal transmission unit 61 on the connecting portion 24 through the groove 211, avoiding wear of the communication line during the rotation of the motor shaft 21. The structure is simple and the installation is convenient, avoiding interruption of the detection data transmission.

[0131] Furthermore, the hot roll includes a frame 1, a motor 2, a bearing, and a wire guiding disc 3.

[0132] The motor 2 is arranged on the frame 1. One end of the motor shaft 21 is arranged on one side of the frame 1, and the other end of the motor shaft 21 penetrates to the other side of the frame 1.

[0133] The wire guiding disc 3 is fixedly sleeved on the outer periphery of the other end of the motor shaft 21 and is located on the other side of the frame 1 for winding fiber filaments.

[0134] The bearing includes a front bearing 25 and a rear bearing 23 which are spaced apart. One end of the motor shaft 21 is rotatably supported in the front bearing 25 and the rear bearing 23. The front bearing 25 is disposed close to the wire guiding disc 3 and is provided at the frame 1 through which the motor shaft 21 passes. The rear bearing 23 is disposed close to the motor body.

[0135] The detection module includes a first vibration sensor 71. The first vibration sensor 71 is disposed on the other end of the motor shaft 21, on the other side of the frame 1, and is used to detect the vibration of the hot roller.

[0136] Preferably, the first vibration sensor 71 is disposed at the connection between the motor shaft 21 and the wire guiding disc 3 to detect the vibration amount B1. The first vibration sensor 71 is disposed close to the end of the other end of the motor shaft 21.

[0137] In one solution, the detection module further includes a second vibration sensor 72 (see Figure 8 ). The second vibration sensor 72 is disposed on the motor shaft 21 between the front bearing 25 and the rear bearing 23 and is used to detect the vibration amount B2.

[0138] In another solution, the detection module further includes a second vibration sensor and a third vibration sensor which are correspondingly disposed at the front bearing 25 and the rear bearing 23 of the motor shaft 21 (not shown in the figure), and correspondingly detect the vibration amounts of the motor shaft 21 at the front bearing 25 and the rear bearing 23, and the average value is taken as the vibration amount B2.

[0139] The detection module further includes a first temperature sensor 73. The first temperature sensor 73 is disposed at the connection between the motor shaft 21 and the wire guiding disc 3 and is used to detect the temperature T1 at this location, so as to judge the temperature of the wire guiding disc 3 and further judge the temperature condition of the heating module 5 for heating the wire guiding disc 3.

[0140] The hot roller further includes a motor housing 22 which is buckled outside the motor 2 on one side of the frame 1, and the signal processing unit 62 is disposed on the motor housing 22.

[0141] The signal transmission unit 61 is disposed on the connecting portion 24 at one end of the motor shaft 21, is disposed opposite to the signal processing unit 62, and is connected by wireless communication means such as Bluetooth and WIFI.

[0142] Further, the detection module further includes a second temperature sensor 74 and a third temperature sensor 75.

[0143] A second temperature sensor 74 is disposed at the front bearing 25 of the motor shaft 21 to detect the temperature T2 of the motor 21 at the front bearing 25. A third temperature sensor 75 is disposed at the rear bearing 23 of the motor shaft 21 to detect the temperature T3 of the motor shaft at the rear bearing 23.

[0144] The temperature of the front bearing 25 at the frame 1 is higher than the temperature at the rear bearing 23.

[0145] As Figure 9 shown, one axial end of the wire guide disc 3 is connected to the other end of the motor shaft 21, and the first vibration sensor 71 is arranged at the connection between the motor shaft 21 and the wire guide disc 3.

[0146] A heating module 5 and a wire guide disc sheath 4 are further included in a hot roller structure. The heater of the heating module 5 has an installation end, and one end face is assembled and fixed on the other end face of the frame 1. The motor shaft 21 passes through a circular hole in the center of the heating module 5 and is connected to the wire guide disc 3.

[0147] The wire guide disc 3 is in the shape of a round cover with an accommodating cavity having an opening, and the accommodating cavity wraps the heating module 5 therein. The other axial opening of the wire guide disc 3 is arranged opposite to the installation end of the heating module 5.

[0148] The wire guide disc sheath 4 is annular and has a certain width. The wire guide disc sheath 4 is sleeved on the outer periphery of the installation end of the heating module 5 and the other axial end of the wire guide disc 3. A certain gap is left between the wire guide disc sheath 4 and the outer peripheral wall of the wire guide disc 3 so that the two can rotate relative to each other.

[0149] The above are only the preferred embodiments of the present invention, and there is no any formal limitation to the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent can make some changes or modifications to equivalent embodiments by using the technical content prompted above within the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the present invention.

Claims

1. An intelligent monitoring method for the hot roller of a spinning device, characterized in that: Including: During the operation of the hot roller, obtain the vibrations at multiple locations of the hot roller and / or the temperatures at multiple locations of the hot roller motor, compare them with preset parameters, determine whether the hot roller is abnormal and the cause of the abnormality. If it is abnormal, give an alarm and control the hot roller to stop rotating.

2. The intelligent monitoring method for the hot roller of a spinning device according to claim 1, characterized in that: Including the following steps: S1. Obtain the radial vibration amount B1 of the wire guide disc of the hot roller, the vibration amount B2 of the motor shaft of the hot roller at the bearing, and the difference ΔB between B1 and B2; Compare the obtained vibration amount B1 with the preset value Ba, and compare the obtained ΔB with the preset value ΔBz1. If the vibration amount B1 is greater than the preset value Ba, it is determined that the wire guide disc vibrates too much abnormally, give an alarm and control the hot roller to stop rotating. If the difference ΔB is greater than the preset value ΔBz1, it is determined that the operating state of the motor shaft is abnormal, give an alarm and control the hot roller to stop rotating.

3. The intelligent monitoring method for the hot roller of a spinning device according to claim 2, characterized in that: In the step S1, the following steps are included: S11. Obtain the radial vibration amount B1 of the wire guide disc, and determine whether the obtained vibration amount B1 is greater than the preset value Ba. If so, it is determined that the wire guide disc vibrates abnormally, give an alarm and control the hot roller to stop rotating. If not, execute step S12; S12. Obtain the vibration amount B2 of the motor shaft of the hot roller at the bearing and the difference ΔB between B1 and B2, and determine whether ΔB is greater than the preset value ΔBz1. If so, the operating state of the motor shaft is abnormal, give an alarm and control the hot roller to stop rotating.

4. The intelligent monitoring method for the hot roller of a spinning device according to claim 3, characterized in that: In the step S12, determine whether ΔB is greater than the preset value ΔBz1. If not, execute the following steps: S13. Determine whether ΔB is less than or equal to ΔBz1 and greater than or equal to ΔBz2. If so, calibrate the abnormal operation flag Feb of the motor shaft and do not give an alarm. If not, the hot roller operates normally, where ΔBz1 > ΔBz2.

5. The intelligent monitoring method for the hot roller of a spinning device according to any one of claims 2-4, characterized in that: The wire guide disc is sleeved outside part of the motor shaft and is connected to the axial end of the motor shaft; In the step S1, obtain the radial vibration amount B1 of the wire guide disc by obtaining the radial vibration amount at the connection of the wire guide disc and the axial end of the motor shaft; obtain the vibration amount B2 by obtaining the radial vibration amount of the motor shaft between the front bearing and the rear bearing; Preferably, obtain 2N detected vibration amounts B1 and B2 within a preset time, and take the arithmetic mean of the N median values in the middle as the effective vibration amounts B1 and B2.

6. The intelligent monitoring method for the hot roller of a spinning device according to any one of claims 2-5, characterized in that: The front bearing and the rear bearing are arranged at intervals and sleeved outside the motor shaft, and the front bearing is arranged close to the wire guide disc; The monitoring method further includes the following steps, or, in the step S1, if it is determined that the hot roller is not abnormal, then execute the following steps: S2. Obtain the temperature T1 at the connection of the motor shaft and the wire guide disc, the temperature T2 of the motor shaft of the hot roller at the front bearing, and the temperature T3 of the motor shaft of the hot roller at the rear bearing; determine whether the obtained temperature T1 is greater than the preset value Ta1, and / or whether the obtained temperature T2 is greater than the preset value Ta2, and / or whether the obtained temperature T3 is greater than the preset value Ta3, and / or whether the obtained temperature T3 is greater than the temperature T1 or greater than the temperature T2; If the obtained temperature T1 is greater than the preset value Ta1, it is determined that the temperature inside the heater of the hot roller is too high, an alarm is given, and the hot roller is controlled to stop heating; if the obtained temperature T2 is greater than the preset value Ta2, it is determined that the temperature of the motor shaft at the front bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than the preset value Ta3, it is determined that the temperature of the motor shaft at the rear bearing is too high, an alarm is given, and the hot roller is controlled to stop heating and rotating; if the obtained temperature T3 is greater than temperature T1 or greater than temperature T2, it is determined that the temperature of the motor shaft at the rear bearing is abnormal and an alarm is given.

7. The intelligent monitoring method for the hot roller of a spinning device according to claim 6, characterized in that: In the step S2, if all the judgments are negative, the following steps are executed: S3. Obtain the difference ΔT between T2 and T3, and judge whether ΔT is less than or equal to the preset value ΔTz1 and whether the temperature T3 is greater than or equal to the preset value Tc, where 0 < ΔTz1 and 0 < Tc < Ta3; if any of the judgment results is positive, obtain whether the flow rate of the cooling system of the hot roller has reached the upper limit. If so, it is determined that the temperature of the hot roller motor is abnormal, a warning is given but no alarm is given. If not, increase the flow rate of the cooling system of the hot roller; if ΔT is greater than the preset value ΔTz1, it is determined that the temperature of the motor shaft at the front bearing is abnormal and an alarm is given; Preferably, if ΔT is less than or equal to the preset value ΔTz1 and the flow rate of the cooling system of the hot roller reaches the upper limit, it is determined that the temperature of the motor shaft at the front bearing is abnormal, a warning is given but no alarm is given; If T3 is greater than or equal to the preset value Tc and the flow rate of the cooling system of the hot roller reaches the upper limit, it is determined that the temperature of the motor shaft at the rear bearing is abnormal, a warning is given but no alarm is given.

8. The intelligent monitoring method for the hot roller of a spinning device according to claim 7, characterized in that: In the step S3, the method for obtaining whether the flow rate of the cooling system of the hot roller has reached the upper limit includes: Obtain the loop flow rate Q1 in the cooling system pipeline at the tail of the hot roller motor, and compare the obtained flow rate Q1 with the preset values Qx and Qs. If the obtained flow rate Q1 is greater than the preset value Qs, it is determined that the flow rate of the cooling system of the hot roller has reached the upper limit; if the obtained flow rate Q1 is less than the preset value Qx, it is determined that the cooling system of the hot roller is abnormal, and the hot roller is controlled to stop heating and rotating, where Qx < Qs.

9. The intelligent monitoring method for the hot roller of a spinning device according to any one of claims 7-8, characterized in that: In the step S3, judge whether ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, where ΔTz2 < ΔTz1. If so, obtain whether the flow rate of the cooling system of the hot roller has reached the upper limit and whether the vibration of the motor shaft is abnormal. If the flow rate reaches the upper limit, it is determined that the temperature of the motor shaft at the front bearing is abnormal, a warning is given and no alarm is given; If the flow rate does not reach the upper limit, increase the flow rate of the cooling system of the hot roller; if the vibration of the motor shaft is abnormal, it is determined that the motor state is abnormal and an alarm is given.

10. A method for intelligent monitoring of a hot roller of a spinning device according to claim 9, characterized in that: In the step S3, when ΔT is less than or equal to the preset value ΔTz1 and greater than or equal to the preset value ΔTz2, first obtain whether the vibration of the motor shaft is abnormal. If so, it is determined that the motor state is abnormal and an alarm is given; if not, obtain whether the flow rate of the cooling system of the hot roller has reached the upper limit. If so, it is determined that the temperature at the front bearing is abnormal, a warning is given and no alarm is given. If not, increase the flow rate of the cooling system of the hot roller.

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