Search

CN-121977829-A - Belt tensioning monitoring device

CN121977829ACN 121977829 ACN121977829 ACN 121977829ACN-121977829-A

Abstract

A belt tension monitoring device (10) for monitoring the belt tension of a belt (2) of a belt drive system (1), the belt drive system (1) comprising a drive pulley (3) and a driven pulley (4) which is rotated by the drive pulley (3) by means of the belt (2), the driven pulley (4) being rotated by the drive pulley (3) by means of the belt (2). The belt tension monitoring device (10) is configured to determine a belt slip effect using at least one marker (14) and a sensor (15), the at least one marker (14) being provided on the belt (2), the sensor (15) being configured to detect the marker and to send a signal to the electronic control unit (13).

Inventors

  • THOMAS FROST
  • ANDREAS CARLSON

Assignees

  • 斯凯孚公司

Dates

Publication Date
20260505
Application Date
20210524
Priority Date
20200526

Claims (10)

  1. 1. A belt tension monitoring device (10, 20) for monitoring a belt tension of a belt (2) of a belt drive system (1), the belt drive system (1) comprising a drive pulley (3) and a driven pulley (4) rotated by the drive pulley (3) by means of the belt (2), wherein the belt tension monitoring device (10, 20) is configured to determine a slip effect of the belt using at least one marker (14, 21, 22) comprising a first marker provided on a surface of one of the pulleys (3, 4) and a sensor (15, 23) provided on the surface of the one of the pulleys (3, 4) and a second marker provided on the belt (2), the sensor (15, 23) being configured to detect the marker and to send a signal to an electronic control unit (13, 23) configured to determine the slip effect of the belt (2) depending on a speed of the one of the pulleys (3, 4) and a frequency of the belt (2).
  2. 2. Belt tension monitoring device (10, 20) according to claim 1, characterized in that the marking is a magnetized area (14, 21, 22), such as a magnet or magnetized rubber fixed on the surface of the belt (2) or magnetic powder embedded in or on the belt, and the sensor is a hall effect sensor.
  3. 3. The belt tension monitoring device (10, 20) of claim 1, wherein the marker is an optical marker, such as a light reflective area or a light reflective strip, and the sensor is an optical sensor.
  4. 4. A belt tension monitoring device (20) as claimed in any one of claims 1 to 3, wherein the belt tension monitoring device (20) comprises a second marking (22) of the same type as the first marking and provided on the belt (2), the sensor (23) being configured to detect the second marking (22).
  5. 5. Belt tension monitoring device (20) according to claim 4, characterized in that the second marking is a magnetized area (14, 21, 22), such as a magnet or magnetized rubber fixed on the surface of the belt (2) or magnetic powder embedded in or on the surface of the belt.
  6. 6. The belt tension monitoring device (20) of claim 4, wherein the second marker is an optical marker, such as a retroreflective region or a retroreflective tape.
  7. 7. A belt tension monitoring device (10) as claimed in any one of claims 1 to 3, characterized in that the belt tension monitoring device (10) comprises at least one marker (11) and a second sensor (12), the at least one marker (11) being provided on a surface of one of the pulleys (3, 4), the second sensor (12) being configured to detect the at least one marker (11) and to send a speed signal to the electronic control unit (13).
  8. 8. Belt tension monitoring device (10) according to claim 7, characterized in that the at least one marking (11) is a light reflective marking and the second sensor (12) is an optical sensor.
  9. 9. Belt tension monitoring device (10) according to claim 7, characterized in that the at least one marker (11) is a magnet or magnetized rubber fixed on the surface of the pulley, and the second sensor (12) is a hall effect sensor.
  10. 10. A belt drive system (1) comprising a belt (2), a drive pulley (3), a driven pulley (4) rotated by the drive pulley (3) by means of the belt (2), and a belt tension monitoring device (10, 20) according to any one of the preceding claims.

Description

Belt tensioning monitoring device Technical Field The present invention relates to the field of condition monitoring devices, and in particular to condition monitoring of belt tension. Background The condition monitoring device allows the condition of the system to be monitored without manual inspection. These devices may be particularly beneficial in remote locations (remote locations) or locations that are difficult and/or dangerous to access. Insufficient belt tension (/ tension) can lead to insufficient power transfer, reduced efficiency, and premature belt failure due to belt slip (/ slip). Excessive belt tension can result in high specific surface pressure (HIGH SPECIFIC surface pressure) on the tension members, risk of lateral deflection (/ lateral bending) (cross flexing), increased deflection stress (/ bending stress) (flexing stress) and increased strain, leading to premature failure and elongation. Proper belt tension is tension just enough to prevent the belt from slipping under normal load conditions. Belt slip is typically defined in a built-in slip table (build-in slip table) based on the speed of the driven pulley (/ driven pulley) (driven pulley). Belt slip occurs on the drive pulley (/ drive pulley) and therefore the speed of all driven pulleys is affected by the same slip. Typical amounts of belt slip are between 1% and 2%, which can result in belt slip effects between 0,01 and 0, 02. It is desirable to estimate whether the belt of a belt drive system is properly tensioned during operation. Disclosure of Invention It is therefore an object of the present invention to provide an improved belt condition monitoring device. A particular object of the invention is to provide a belt tension monitoring device for monitoring the belt tension of a belt drive system comprising a drive pulley (driving pulley) and a driven pulley (/ driven pulley) (driven pulley) rotated by the drive pulley through the belt. The belt tension monitoring device is configured to determine a belt slip effect (belt SLIP EFFECT) using at least one marker disposed on the belt and a sensor configured to detect the marker and send a signal to an electronic control unit. For example, the marker is a magnetized area such as a magnet or magnetized rubber fixed on the surface of the belt, or magnetic powder embedded in or on the belt, and the sensor is a hall effect sensor. Alternatively, the marker is an optical marker, such as a reflective area or strip (/ reflective area or strip) (REFLECTIVE AREA or a tape), and the sensor is an optical sensor. According to one embodiment, the belt tensioner includes a second marker disposed on the belt, and the sensor is configured to detect the second marker. For example, the second mark is a magnetized area such as a magnet or magnetized rubber fixed on the surface of the belt, or magnetic powder embedded in or on the belt. Alternatively, the second mark is an optical mark, such as a retroreflective region or retroreflective tape. According to another embodiment, the belt includes a plurality of indicia. According to another embodiment, the markings of the belt are of the same type, for example of the magnetic type or of the optical type. According to another embodiment, the belt tensioner comprises at least one marker disposed on a surface of one of the pulleys and a second sensor configured to detect the at least one marker and send a speed signal to an electronic control unit. The at least one marking may be a light reflective marking and the second sensor may be an optical sensor, such as an infrared sensor for example. The at least one marker may be a magnet or magnetized rubber fixed to a surface of the pulley and the second sensor may be a hall effect sensor. According to another aspect, the present invention relates to a belt drive system comprising a belt, a drive pulley, a driven pulley, and a belt tension monitoring device as described above, the driven pulley being rotated by the drive pulley through the belt. Drawings The invention and its advantages will be better understood by studying the detailed description of the specific embodiments, given as a non-limiting example and illustrated by the accompanying drawings, wherein: FIG. 1 is a schematic illustration of a belt drive system including a belt tension monitoring device according to an embodiment of the invention, and Fig. 2 is a schematic view of a belt drive system including a belt tension monitoring device according to another embodiment of the present invention. Detailed Description Referring to fig. 1, which shows an embodiment of a belt tension monitoring device 10 for monitoring belt tension of a belt 2 of a belt drive system 1, the belt drive system 1 comprises a drive pulley 3 and a driven pulley 4, the driven pulley 4 being rotated by the drive pulley 3 through the belt 2. For example, the belt 2 is a V-belt. The belt tension monitoring device 10 includes a first marker 11 disposed on one of the pulleys (e.g., t