Elevator brake braking force torque detection system

Abstract

The utility model belongs to the technical field of elevator safety detection, and particularly discloses an elevator brake braking force torque detection system which comprises an elevator main control board, a frequency converter, a traction machine, an encoder, a measuring platform, a heater and a refrigerator. The elevator main control board controls the frequency converter to output increasing current to drive the traction machine to rotate in the elevator stopping state, and the encoder is used for monitoring the running state of the traction machine. The dynamic torque sensor is arranged on the measuring platform, a rotating shaft of the dynamic torque sensor is connected with a hub of the traction machine through a flange, the elevator main control board is connected with the dynamic torque sensor, and the heater and the refrigerator are connected with the elevator main control board so that heating or cooling of the traction machine can be achieved. Therefore, brake torque measurement and brake shoe wear monitoring under different temperature working conditions are realized, and the device and the method have the advantages of accurate measurement and high measurement efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator safety detection, and particularly relates to a detection system for the braking force moment of an elevator brake. Background Art

[0002] As the main vertical transportation means in high-rise buildings, elevators bring great convenience to people's travel and cargo transportation. To ensure the safe operation of elevators, many safety components are installed on elevators. Among them, the brake of the traction machine is the most frequently used and important component during the operation of the elevator. Its performance directly determines the safety of the entire elevator. Once the brake of the traction machine fails to brake, accidents such as shearing, over-running, or bottoming are likely to occur, threatening the lives of passengers.

[0003] The existing inspection and maintenance content of elevator brakes usually includes the overall appearance inspection of the brake, micro-switch, brake spring, and the gap inspection between the hub and the brake shoe. For the braking performance test of the brake, it is mainly to cut off the power supply of the traction machine when the elevator car is in the no-load state, the brake works, the traction machine brakes, and check the stopping situation of the car and observe whether there is abnormal noise during the braking process of the brake, and check whether the gap between the hub and the brake shoe exceeds the tolerance. For the measurement of the braking force moment of the brake, it is mostly to place weights in the elevator car according to the rated braking force moment of the brake until the brake wheel of the brake starts to rotate, and calculate the static braking force moment of the brake with the total mass of the weights.

[0004] Generally speaking, the existing method for measuring the braking force moment of the brake has high detection cost, low efficiency, and lacks timely monitoring of the wear condition of the brake shoe under different temperature conditions. In view of this, the utility model proposes a detection system for the braking force moment of an elevator brake to solve the above technical problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a detection system for the braking force moment of an elevator brake to solve the problems of high detection cost, low efficiency, and lack of timely monitoring of the wear condition of the brake shoe under different working conditions in the prior art.

[0006] To achieve the above purpose, the utility model provides a detection system for the braking force moment of an elevator brake, including an inverter connected to the main control board of the elevator, the inverter is connected to a traction machine and an encoder, a measurement platform, a dynamic torque sensor is arranged on the measurement platform, the rotating shaft of the dynamic torque sensor is connected to the hub of the traction machine through a flange, and the dynamic torque sensor is connected to the main control board of the elevator. Its characteristics are as follows:

[0007] It further includes a heater and a cooler, which are installed on the traction machine through a mounting bracket, and the heater and the cooler are respectively connected to the main elevator control board.

[0008] Preferably, in the above technical solution, the flange is detachably arranged in the middle of the traction machine hub through bolts.

[0009] Preferably, in the above technical solution, it further includes an infrared imaging device.

[0010] Preferably, in the above technical solution, the main elevator control board is further provided with a Bluetooth module, and the Bluetooth module is wirelessly connected to the infrared imaging device.

[0011] Preferably, in the above technical solution, the main elevator control board is further provided with a delay module for controlling the output of the frequency converter.

[0012] Preferably, in the above technical solution, the heater includes a heating rod and a first temperature control circuit, the heating rod is connected to the first temperature control circuit, and the first temperature control circuit is connected to the main elevator control board.

[0013] Preferably, in the above technical solution, the cooler includes a fan, a thermoelectric cooler and a second temperature control circuit, the thermoelectric cooler is connected to the second temperature control circuit, and the fan and the second temperature control circuit are respectively connected to the main elevator control board.

[0014] Preferably, in the above technical solution, it further includes an audible and visual alarm module, and the audible and visual alarm module is connected to the main elevator control board.

[0015] Preferably, in the above technical solution, it further includes a display screen and a button module, and the display screen and the button module are respectively connected to the main elevator control board.

[0016] Compared with the existing technology, the present invention has the following beneficial effects:

[0017] 1. The present utility model controls the heater and the cooler through the main elevator control board to heat or cool the hub and the brake shoe of the traction machine, so as to simulate different working environment temperatures of the traction machine brake shoe. The main elevator control board controls the frequency converter to output an increasing current to drive the traction machine to rotate again when the traction machine is in a stopped state, and detects the output torque when the traction machine rotates through a dynamic torque sensor, realizing the measurement of the braking torque of the brake at different temperatures and the monitoring of the wear condition of the brake shoe of the brake. At the same time, the cooler cools the brake shoe and the hub, so that after each torque measurement, the brake shoe can quickly return to the temperature before the test, shortening the waiting time for the next measurement and avoiding the reduction of the braking ability of the brake shoe due to thermal fatigue, which affects the measurement accuracy.

[0018] 2. The utility model collects the temperature data of the brake shoe of the brake through an infrared imaging device. The infrared imaging device communicates with the main control board of the elevator through a Bluetooth module, enabling maintenance personnel to observe the heat generation situation of the brake shoe in a timely manner, understand and evaluate the status of the brake shoe. When it is detected that the temperature of the brake shoe is higher than the set threshold, the main control board of the elevator drives the sound and light alarm module to give an alarm to remind the maintenance personnel to terminate the measurement test or adjust the step current size of the frequency converter, preventing further damage to the brake shoe and resulting in the failure of the brake, thus improving the safety of the brake measurement test.

[0019] 3. The utility model controls the current time for the frequency converter to output and drive the traction machine to rotate through a delay module, preventing the test current from overshooting and making the measurement result more accurate. Description of the Drawings

[0020] Figure 1 is the overall electrical principle structure schematic diagram of the utility model.

[0021] Figure 2 is the schematic diagram of the installation positions of the heater and the cooler of the utility model.

[0022] Figure 3 is the schematic diagram of the connection structure between the dynamic torque sensor and the traction machine of the utility model.

[0023] In the figure: 1 - main control board of the elevator, 2 - frequency converter, 3 - heater, 4 - cooler, 5 - traction machine, 6 - encoder, 7 - dynamic torque sensor, 8 - display screen, 9 - button module, 10 - Bluetooth module, 11 - infrared imaging device, 12 - delay module, 13 - mounting bracket, 14 - brake shoe, 15 - heating rod, 16 - hub, 17 - sound and light alarm module, 18 - measurement platform, 19 - flange, 20 - bolt. Detailed Embodiment

[0024] The following combines the drawings to describe in detail the specific embodiments of the present invention, but it should be understood that the protection scope of the invention is not limited by the specific embodiments.

[0025] Reference Figures 1 - 3, the present utility model provides a braking force torque detection system for an elevator, which includes an elevator main control board 1, a heater 3, a cooler 4, a frequency converter 2, a traction machine 5, an encoder 6 and a measurement platform 18. The elevator main control board 1 is connected to the frequency converter 2, and the traction machine 5 and the encoder 6 are respectively connected to the frequency converter 2, so as to enable the elevator to control the operation of the traction machine 5 through the elevator main control board 1 by controlling the frequency converter 2, and monitor the operation state of the traction machine 5 through the encoder 6. A dynamic torque sensor 7 is provided on the measurement platform 18. The rotating shaft of the dynamic torque sensor 7 is connected to the hub 16 of the traction machine 5 through a flange 19. The flange 19 is detachably arranged in the middle of the hub 16 through bolts 20. The elevator main control board 1 is connected to the dynamic torque sensor 7 to measure the torque when the traction machine 5 rotates again, and this torque corresponds to the braking force torque of the brake. The heater 3 and the cooler 4 are installed on the traction machine 5 through a mounting bracket 13. The heater 3 and the cooler 4 are respectively connected to the elevator main control board 1. The heater 3 includes a heating rod 15 and a first temperature control circuit. The heating rod 15 is connected to the first temperature control circuit, and the first temperature control circuit is connected to the elevator main control board 1. The cooler 4 includes a fan, a thermoelectric cooler and a second temperature control circuit. The thermoelectric cooler is connected to the second temperature control circuit, and the second temperature control circuit and the fan are respectively connected to the elevator main control board 1. Before measuring the braking force torque of the elevator brake, the elevator main control board 1 controls the heater 3 or the cooler 4 to work to heat or cool the brake shoe 14 and the hub 16 of the traction machine 5, so as to measure the braking force torque of the brake at different temperatures and monitor the wear condition of the brake shoe 14 of the brake at different temperatures. At the same time, the cooler 4 cools the brake shoe 14 and the hub 16, so that after each measurement of the torque of the brake, the brake shoe 14 can quickly return to the temperature before the test, shortening the waiting time for the next measurement and avoiding the decrease of the braking ability of the brake shoe 14 due to thermal fatigue, which affects the measurement accuracy.

[0026] Continue to refer to Figure 1, the elevator brake braking torque detection system of this embodiment further includes an infrared camera device 11 and an acoustic-optic alarm module 17. The elevator main control board 1 is also provided with a Bluetooth module 10, a display screen 8, and a button module 9. The infrared camera device 11 is wirelessly connected to the Bluetooth module 10 to monitor the operating temperatures of the brake shoe 14 and the hub 16 of the traction machine 5 through the infrared camera device 11, and send the collected temperature data to the Bluetooth module 10. Maintenance personnel can interact with the system through the button module 9 and the display screen 8. The acoustic-optic alarm module 17 is connected to the elevator main control board 1 to achieve abnormal temperature alarm of the brake shoe 14 during the measurement process, reminding maintenance personnel to terminate the measurement test in time or adjust the step current size output by the frequency converter 2, preventing further damage to the brake shoe 14 and resulting in the failure of the brake, and improving the safety of the brake braking torque detection test. The elevator main control board 1 is provided with a delay module 12 to control the current time for driving the traction machine 5 to rotate output by the frequency converter 2, preventing the increasing speed of the increasing current output by the frequency converter 2 from being too fast, and there being an error in the torque collected by the dynamic torque sensor 7 to make the traction machine 5 rotate again, so that the measurement result of the braking torque of the brake of the traction machine 5 is more accurate.

[0027] The process of the system for measuring the static torque of the elevator brake is as follows:

[0028] 1. Control the elevator car to rise to the top floor and stop through the elevator main control board 1, and the display screen 8 shows the position where the elevator car is located.

[0029] 2. Set the operating temperature of the brake through the button module 9. When it is necessary to raise the temperature, place the heating rod 15 of the heater 3 on the hub 16 of the traction machine 5, and heat the brake shoe 14 and the hub 16 by means of heat transfer. When it is necessary to lower the temperature, the elevator main control board 1 drives the cooler 4 to work to cool the brake shoe 14 and the hub 16. During this period, the temperature data of the brake shoe 14 and the hub 16 can be monitored through the infrared camera device 11.

[0030] 3. After completing the simulation of the working environment of the brake, set the delay of the delay module 12 and the step of the increasing current output by the frequency converter 2 according to the rated torque on the elevator brake nameplate, and then start the measurement.

[0031] 4. The frequency converter 2 drives the traction machine 5 to rotate by outputting an increasing current. When the encoder 6 detects that the traction machine 5 starts to rotate, the elevator main control board 1 collects the torque size output by the traction machine 5 measured by the dynamic torque sensor 7, generates the corresponding elevator brake braking torque value, and displays it through the display screen 8.

[0032] The process of the system for measuring the dynamic torque of the elevator brake is as follows:

[0033] 1. Set the operating temperature of the brake through the button module 9. When it is necessary to increase the temperature, place the heating rod 15 of the heater 3 on the hub 16 of the traction machine 5, and heat the brake shoe 14 and the hub 16 through heat transfer. When it is necessary to decrease the temperature, the elevator main control board 1 drives the cooler 4 to work to cool the brake shoe 14 and the hub 16. During this period, the temperature data of the brake shoe 14 and the hub 16 can be monitored through the infrared imaging device 11.

[0034] 2. Set the parking position of the elevator car and the time to cut off the elevator power supply through the button module 9. The frequency converter 2 generates a driving current to make the traction machine 5 operate, driving the elevator car to move up or down at the rated speed. When the elevator brakes, the elevator main control board 1 collects the maximum torque value before the traction machine 5 stops rotating measured by the dynamic torque sensor 7, generates the corresponding elevator brake braking torque value, and displays it through the display screen 8.

[0035] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many changes and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and changes. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An elevator brake braking torque detection system, comprising an elevator main control board, an inverter connected to the elevator main control board, the inverter is connected to a traction machine and an encoder, a measurement platform, a dynamic torque sensor is provided on the measurement platform, the rotating shaft of the dynamic torque sensor is connected to the hub of the traction machine through a flange, and the dynamic torque sensor is connected to the elevator main control board, characterized in that: It further includes a heater and a cooler, the heater and the cooler are installed on the traction machine through mounting brackets, and the heater and the cooler are respectively connected to the elevator main control board.

2. The elevator brake braking force moment detection system according to claim 1, wherein The flange is detachably provided in the middle of the traction machine hub through bolts.

3. The elevator brake braking force moment detection system according to claim 1, characterized in that, It further includes an infrared imaging device.

4. The elevator brake braking torque detection system according to claim 3, wherein The elevator main control board is further provided with a Bluetooth module, and the Bluetooth module is wirelessly connected to the infrared imaging device.

5. The elevator brake braking torque detection system according to claim 1, characterized in that, The elevator main control board is further provided with a delay module for controlling the output of the inverter.

6. The elevator brake braking torque detection system according to claim 1, wherein The heater includes a heating rod and a first temperature control circuit, the heating rod is connected to the first temperature control circuit, and the first temperature control circuit is connected to the elevator main control board.

7. The elevator brake braking force moment detection system according to claim 1, characterized in that, The cooler includes a fan, a thermoelectric cooler and a second temperature control circuit, the thermoelectric cooler is connected to the second temperature control circuit, and the fan and the second temperature control circuit are respectively connected to the elevator main control board.

8. The elevator brake braking force torque detection system according to claim 1, characterized in that, It further includes an audible and visual alarm module, and the audible and visual alarm module is connected to the elevator main control board.

9. The elevator brake braking force moment detection system according to claim 1, characterized in that The elevator main control board is further provided with a display screen and a key module.

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