Diversion sheave bearing jamming detection method and device

Abstract

The invention discloses a diversion sheave bearing jamming detection method which comprises the following steps: when an elevator runs, detecting the tension T1 of a first part of a steel wire rope, and calculating the tension T2 of a second part of the steel wire rope; the first position of the steel wire rope is the lower end of a rope head fixing position after the steel wire rope bypasses the diversion sheave, and the second position of the steel wire rope is the lower end of a traction sheave after the steel wire rope bypasses the diversion sheave; and when the average value of the difference value of the tension T1 at the first position of the steel wire rope and the tension T2 at the second position of the steel wire rope in the preset time period exceeds the preset tension threshold value interval, it is judged that the diversion sheave bearing is blocked, and an early warning signal is sent out. According to the invention, the detection of the bearing jamming of the diversion sheave can be realized without adding a detection device near the diversion sheave.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly relates to a detection method and device for anti-tension pulley bearing jamming. Background Art

[0002] The counterweight anti-tension pulley is an important part of the elevator suspension system. Its main functions are to change the running direction of the steel wire rope and reduce the output power of the traction machine. However, during the operation of the elevator, due to reasons such as bearing jamming of the rope pulley and loosening of the steel wire rope, the steel wire rope may come off the rope groove, which may lead to serious accidents such as the dropping of the counterweight frame. Therefore, how to detect the bearing jamming of the anti-tension pulley is a technical problem currently faced. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a detection method for anti-tension pulley bearing jamming. When the elevator is running, the tension T1 of the steel wire rope at the first position is detected, and the tension T2 of the steel wire rope at the second position is calculated; the first position of the steel wire rope is the lower end of the rope head fixing position after the steel wire rope bypasses the anti-tension pulley, and the second position of the steel wire rope is the lower end of the steel wire rope entering the traction wheel after bypassing the anti-tension pulley; when the average value of the difference between the tension T1 of the steel wire rope at the first position and the tension T2 of the steel wire rope at the second position exceeds the preset tension threshold range within a preset time period, it is determined that the anti-tension pulley bearing is jammed, and a warning signal is sent outwards.

[0004] Preferably, the tension T1 of the steel wire rope at the first position is obtained by detecting with a steel wire rope tension sensor.

[0005] Preferably, the tension T2 of the steel wire rope at the second position is obtained by calculating based on the output torque of the traction machine.

[0006] The present invention also provides a detection method for anti-tension pulley bearing jamming. When the elevator is running, the tension T1 of the steel wire rope at the first position is detected, and the tension T2 of the steel wire rope at the second position is calculated; the first position of the steel wire rope is the lower end of the rope head fixing position after the steel wire rope bypasses the anti-tension pulley, and the second position of the steel wire rope is the lower end of the steel wire rope entering the traction wheel after bypassing the anti-tension pulley;

[0007] According to the tension T1 of the steel wire rope at the first position and the tension T2 of the steel wire rope at the second position, the friction force f between the steel wire rope and the anti-tension pulley is calculated; when the average value of the friction force f exceeds the preset friction force threshold range within a preset time period, it is determined that the anti-tension pulley bearing is jammed, and a warning signal is sent outwards.

[0008] The present invention also provides a detection device for anti-tension pulley bearing jamming, including:

[0009] A tension detection unit for the first position of the steel wire rope, which detects the tension T1 of the steel wire rope at the first position;

[0010] The tension calculation unit at the second position of the wire rope calculates the tension T2 at the second position of the wire rope according to the output torque of the traction machine;

[0011] The back-rope-wheel bearing jamming judgment unit judges that the back-rope-wheel bearing is jammed and sends out a warning signal outward when the average value of the difference between the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope exceeds a preset tension threshold range within a preset time period during the operation of the elevator.

[0012] The present invention also provides a detection device for back-rope-wheel bearing jamming, including:

[0013] The tension detection unit at the first position of the wire rope detects the tension T1 at the first position of the wire rope;

[0014] The tension calculation unit at the second position of the wire rope calculates the tension T2 at the second position of the wire rope according to the output torque of the traction machine;

[0015] The friction force calculation unit calculates the friction force f between the wire rope and the back-rope-wheel according to the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope. When the average value of the friction force f exceeds a preset friction force threshold range within a preset time period during the operation of the elevator, it is judged that the back-rope-wheel bearing is jammed and a warning signal is sent out outward.

[0016] Compared with the prior art, the present invention can realize the detection of back-rope-wheel bearing jamming without adding a detection device near the back-rope-wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present invention in detail in conjunction with the drawings and specific embodiments:

[0018] Figure 1 It is a schematic diagram of an elevator system in the detection method for back-rope-wheel bearing jamming in Embodiment 1. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following specific embodiments are used to illustrate the implementation manners of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners. The details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without departing from the overall design concept of the invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited only to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0020] Example 1

[0021] As Figure 1 shown in the elevator system, there is a backsheave 5 on the counterweight 7 of the elevator. The steel wire rope 6 bypasses the backsheave 5, one end is fixed to the top 4 of the hoistway through a rope socket, and the other end bypasses the traction sheave 3 on the traction machine to the car (not shown in the figure). Similarly, the backsheave 5 can also be the backsheave on the car, and this time the counterweight 7 is replaced by the car. Therefore, the backsheave 5 in this embodiment can be a counterweight backsheave or a car backsheave.

[0022] This example provides a method for detecting the jamming of the backsheave bearing. When the elevator is running, the tension T1 at the first place of the steel wire rope is detected, and the tension T2 at the second place of the steel wire rope is calculated; the first place of the steel wire rope is the lower end of the rope socket fixing place after the steel wire rope bypasses the backsheave, and the second place of the steel wire rope is the lower end of the place where the steel wire rope enters the traction sheave after bypassing the backsheave;

[0023] When the average value of the difference between the tension T1 at the first place of the steel wire rope and the tension T2 at the second place of the steel wire rope exceeds the preset tension threshold range within a preset time period, it is determined that the backsheave bearing is jammed, and a warning signal is sent outwards.

[0024] The tension T1 at the first place of the steel wire rope is obtained by detecting with a steel wire rope tension sensor. The tension T2 at the second place of the steel wire rope is obtained by calculating the output torque of the traction machine.

[0025] Generally, when the backsheave is running normally, the values of T1 and T2 are very close, and the preset tension threshold range can be obtained through a large amount of experimental data and actual operation experience.

[0026] The warning signal is sent to the elevator control system, for example, to make the elevator enter the safety mode, stop the current running state, and avoid further expansion of potential hazards. At the same time, the abnormal data is uploaded to the monitoring center to notify the maintenance personnel.

[0027] Example 2

[0028] This embodiment provides a method for detecting the jamming of the backsheave bearing. When the elevator is running, the tension T1 at the first place of the steel wire rope is detected, and the tension T2 at the second place of the steel wire rope is calculated; the first place of the steel wire rope is the lower end of the rope socket fixing place after the steel wire rope bypasses the backsheave, and the second place of the steel wire rope is the lower end of the place where the steel wire rope enters the traction sheave after bypassing the backsheave;

[0029] Calculate the friction f between the steel wire rope and the backsheave according to the tension T1 at the first place of the steel wire rope and the tension T2 at the second place of the steel wire rope; when the average value of the friction f exceeds the preset friction threshold range within a preset time period, it is determined that the backsheave bearing is jammed, and a warning signal is sent outwards. The preset friction threshold range can be obtained through a large amount of experimental data and actual operation experience.

[0030] Example 3

[0031] This embodiment provides a detection device for the jamming of the back rope wheel bearing, including:

[0032] A tension detection unit at the first position of the steel wire rope to detect the tension T1 at the first position of the steel wire rope;

[0033] A tension calculation unit at the second position of the steel wire rope to calculate the tension T2 at the second position of the steel wire rope according to the output torque of the traction machine;

[0034] A back rope wheel bearing jamming judgment unit. When the elevator is running, if the average value of the difference between the tension T1 at the first position of the steel wire rope and the tension T2 at the second position of the steel wire rope exceeds the preset tension threshold range within a preset time period, it is judged that the back rope wheel bearing is jammed, and a warning signal is sent outwards.

[0035] Example 4

[0036] This embodiment of a detection device for the jamming of the back rope wheel bearing includes:

[0037] A tension detection unit at the first position of the steel wire rope to detect the tension T1 at the first position of the steel wire rope;

[0038] A tension calculation unit at the second position of the steel wire rope to calculate the tension T2 at the second position of the steel wire rope according to the output torque of the traction machine;

[0039] A friction calculation unit to calculate the friction f between the steel wire rope and the back rope wheel according to the tension T1 at the first position of the steel wire rope and the tension T2 at the second position of the steel wire rope. When the elevator is running, if the average value of the friction f exceeds the preset friction threshold range within a preset time period, it is judged that the back rope wheel bearing is jammed, and a warning signal is sent outwards.

[0040] The above has described the present invention in detail through specific implementation manners and examples, but these do not constitute limitations on the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A detection method for the jamming of a backsheave bearing, characterized in that When the elevator is running, detect the tension T1 at the first position of the wire rope, and calculate the tension T2 at the second position of the wire rope; the first position of the wire rope is the lower end of the wire rope fixed at the rope head after passing around the deflector sheave, and the second position of the wire rope is the lower end of the wire rope entering the traction sheave after passing around the deflector sheave; When the average value of the difference between the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope exceeds the preset tension threshold range within a preset time period, it is determined that the deflector sheave bearing is jammed, and a warning signal is sent outwards.

2. The detection method for the anti-tension pulley bearing jamming according to claim 1, wherein The tension T1 at the first position of the wire rope is detected by a wire rope tension sensor.

3. The detection method for the anti-tension pulley bearing jamming according to claim 1, wherein, The tension T2 at the second position of the wire rope is calculated based on the output torque of the traction machine.

4. A detection method for the jamming of the back-rope pulley bearing, characterized in that, When the elevator is running, detect the tension T1 at the first position of the wire rope, and calculate the tension T2 at the second position of the wire rope; the first position of the wire rope is the lower end of the wire rope fixed at the rope head after passing around the deflector sheave, and the second position of the wire rope is the lower end of the wire rope entering the traction sheave after passing around the deflector sheave; Calculate the friction f between the wire rope and the deflector sheave according to the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope; when the average value of the friction f exceeds the preset friction threshold range within a preset time period, it is determined that the deflector sheave bearing is jammed, and a warning signal is sent outwards.

5. The detection method for the anti-tension pulley bearing jamming according to claim 4, wherein, The tension T1 at the first position of the wire rope is detected by a wire rope tension sensor.

6. The detection method for the anti-tension pulley bearing jamming according to claim 4, wherein The tension T2 at the second position of the wire rope is calculated based on the output torque of the traction machine.

7. A detection device for the jamming of a sheave bearing, characterized in that, It includes: A tension detection unit for the first position of the wire rope to detect the tension T1 at the first position of the wire rope; A tension calculation unit for the second position of the wire rope to calculate the tension T2 at the second position of the wire rope according to the output torque of the traction machine; A deflector sheave bearing jam determination unit, when the elevator is running, when the average value of the difference between the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope exceeds the preset tension threshold range within a preset time period, determine that the deflector sheave bearing is jammed, and send out a warning signal outwards.

8. A detection device for the jamming of a backsheave bearing, characterized in that, It includes: A tension detection unit for the first position of the wire rope to detect the tension T1 at the first position of the wire rope; A tension calculation unit for the second position of the wire rope to calculate the tension T2 at the second position of the wire rope according to the output torque of the traction machine; A friction calculation unit to calculate the friction f between the wire rope and the deflector sheave according to the tension T1 at the first position of the wire rope and the tension T2 at the second position of the wire rope. When the elevator is running, when the average value of the friction f exceeds the preset friction threshold range within a preset time period, determine that the deflector sheave bearing is jammed, and send out a warning signal outwards.

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