Elevator host traction force detection method and system and storage medium
By installing a fixed traction test device and a surround angle adjustment device on the elevator main machine, simulating different working conditions and using force sensor data to calculate the traction value, the problem that the existing technology cannot accurately detect the traction force of the elevator main machine is solved, and a fast and accurate detection effect is achieved, accidents are avoided and the elevator operation efficiency is improved.
Patent Information
- Application Number
- CN202510226043.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-05-23
AI Technical Summary
The prior art cannot accurately detect the actual data of the traction force of the elevator host, cannot determine whether the current traction force meets the standard value, and cannot determine whether the traction wheel needs to be replaced in time.
By installing a fixed traction test device, installing a test wire rope movably, adjusting the closure angle adjustment device to simulate different working conditions, and using force sensor data to calculate whether the traction value meets the preset requirements.
It realizes accurate and rapid detection of the traction force of the elevator main engine, can detect traction abnormalities in time, avoid accidents, and improve elevator operation efficiency and passenger comfort.
Smart Images
Figure CN120024774A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of elevator detection, and in particular to an elevator host traction force detection method, system and storage medium. Background Art
[0002] In order to save energy and reduce emissions, most elevators at this stage use traction main machines. The traction wheels on the traction main machines have wheel grooves, and the traction wire ropes are suspended on the elevator traction machine. One side of the wire rope is connected to the elevator car, and the other side is connected to the counterweight. Therefore, the traction force provided by the wheel grooves is crucial. If the traction force is too large, the main machine will lift the empty car under extreme working conditions, causing accidents. If the traction force is too small, "slipping" or even shearing accidents will occur when the elevator stops. Therefore, the rapid and accurate detection of the traction force of the traction wheel groove of the driving main machine has become a crucial issue. However, the current method of detecting traction force is to observe the state of the elevator main machine through upward braking, downward braking, and no-load traction force tests. It is impossible to obtain the actual data of the traction force, and it is impossible to compare the current actual traction force with the required standard traction force value. It is impossible to judge whether the state of replacing the traction wheel is approaching. Summary of the invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an elevator host traction force detection method, system and storage medium.
[0004] The object of the present invention is achieved through the following technical solutions: The first aspect of the present invention provides: a method for detecting the traction force of an elevator host, comprising the following steps: Install and fix the traction force test device on the target host support beam; A test wire rope is movably installed on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Adjust the wrap angle adjustment device so that the wrap angle during testing is the same as the actual working condition; The first preload hydraulic cylinder and the second preload hydraulic cylinder are respectively adjusted according to the calculated preload force or the manufacturer's standard preload force; The force sensor data on the host is used to calculate whether the test traction force value meets the preset requirements.
[0005] Preferably, the traction force testing device comprises a traction wheel, a test wire rope is arranged on the traction wheel, a first force sensor and a first preload hydraulic cylinder are arranged at one end of the test wire rope, a second force sensor and a second preload hydraulic cylinder are arranged at the other end of the test wire rope, the test wire rope is movably mounted on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm, and the wrap angle adjustment device comprises an wrap angle adjustment annular rack and a wrap angle adjustment hand wheel; When testing the traction sheave of the target main machine, place the base of the traction force test device on the support beam of the target main machine, select a test wire rope with the same specification as the elevator traction wire of the target main machine and install it on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; turn the wrap angle adjustment hand wheel according to the wrap angle or design wrap angle on the traction sheave to make the wrap angle in the test state consistent with the wrap angle in the working state, simulate the upward braking, downward braking and no-load traction force test conditions according to the car weight and counterweight weight, run the elevator maintenance until the traction sheave and the test wire rope slip, and then test whether the traction force values under different test conditions meet the traction force requirements under the conditions specified in the national standards, and make corresponding adjustments.
[0006] Preferably, different equivalent friction coefficients are used to calculate the traction force values for traction wheels with different traction wheel grooves and manufacturing processes; and different friction coefficients are used to calculate the traction force values for different test conditions.
[0007] The second aspect of the present invention provides: an elevator host traction force detection system, used to implement any of the above elevator host traction force detection methods, comprising: The installation module is used to install and fix the traction force test device on the target host support beam; and to movably install the test wire rope on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Angle adjustment module, used to adjust the angle adjustment device so that the angle during detection is the same as the actual working condition; The traction force calculation module is used to adjust the first preload hydraulic cylinder and the second preload hydraulic cylinder respectively according to the calculated preload force or the manufacturer's standard preload force; and calculate the test traction force value according to the force sensor data on the host to see whether it meets the preset requirements.
[0008] The third aspect of the present invention provides: a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by a processor, any of the above-mentioned elevator host traction force detection methods is implemented.
[0009] The beneficial effects of the present invention are: 1) By adjusting the wrap angle adjustment device to adapt to the traction force detection of traction wheels with different wrap angles, and using the preload hydraulic cylinder arm to adjust the load and wrap angle of the test wire rope on the traction wheel, it can fully simulate the operating state of the elevator car under different working conditions and accurately and quickly test the traction force under different working conditions.
[0010] 2) Accurate detection of the traction force of the traction wheel helps to adjust the parameters of the elevator control system so that the elevator can accurately control the speed and acceleration according to the actual traction force during operation, improve the running stability, reduce the frustration during starting and braking, and enhance the riding comfort of passengers; reasonable traction can ensure that the elevator runs in the best state, avoid abnormal speed and frequent stops caused by traction problems, improve the elevator operation efficiency, and shorten the waiting time and riding time of passengers.
[0011] 3) The traction force of the traction wheel is insufficient. When the elevator is fully loaded and going down or unloaded and going up, it may not provide enough friction to hold the car, causing the car to fall or hit the roof, resulting in serious casualties and equipment damage. By detecting the traction force, problems can be discovered in time and measures can be taken to avoid such accidents. When the traction force of the traction wheel is abnormal, the elevator may slip when it stops at the level floor, causing passengers to fall or get pinched. Testing the traction force can check hidden dangers in advance and ensure the safety of passengers entering and exiting the car. When the elevator brakes, the traction force of the traction wheel and the brake work together to stop the car. Testing the traction force can ensure that the traction wheel provides appropriate reverse force during braking, so that the braking system works effectively and prevents excessive braking distance or braking failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a flow chart of the elevator host traction force detection method; Figure 2 This is a schematic diagram of the traction force test device; Figure 3 Schematic diagram of U-shaped traction sheave groove and V-shaped traction sheave groove. DETAILED DESCRIPTION
[0013] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0014] See also Figure 1-Figure 3 The first aspect of the present invention provides: a method for detecting the traction force of an elevator host, comprising the following steps: Install and fix the traction force test device on the target host support beam; A test wire rope is movably installed on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Adjust the wrap angle adjustment device so that the wrap angle during testing is the same as the actual working condition; The first preload hydraulic cylinder and the second preload hydraulic cylinder are respectively adjusted according to the calculated preload force or the manufacturer's standard preload force; The force sensor data on the host is used to calculate whether the test traction force value meets the preset requirements.
[0015] In this embodiment, it can be easily installed in the machine room, and the preload force can be changed to adapt to different working conditions (including upward braking, downward braking, and no-load traction force conditions), and the wrap angle can be adjusted to adapt to the traction force test of the traction machine with different wrap angles. In addition, for elevators with sufficient space between the main machine and the bracket, the traction force can be tested by winding the test wire rope downward without disassembling the original traction wire rope.
[0016] In some embodiments, the traction force testing device includes a traction wheel, a test wire rope is arranged on the traction wheel, a first force sensor and a first preload hydraulic cylinder are arranged at one end of the test wire rope, a second force sensor and a second preload hydraulic cylinder are arranged at the other end of the test wire rope, the test wire rope is movably mounted on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm, and the wrap angle adjustment device includes an wrap angle adjustment annular rack and an wrap angle adjustment hand wheel; When testing the traction sheave of the target main machine, place the base of the traction force test device on the support beam of the target main machine, select a test wire rope with the same specification as the elevator traction wire of the target main machine and install it on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; turn the wrap angle adjustment hand wheel according to the wrap angle or design wrap angle on the traction sheave to make the wrap angle in the test state consistent with the wrap angle in the working state, simulate the upward braking, downward braking and no-load traction force test conditions according to the car weight and counterweight weight, run the elevator maintenance until the traction sheave and the test wire rope slip, and then test whether the traction force values under different test conditions meet the traction force requirements under the conditions specified in the national standards, and make corresponding adjustments.
[0017] In this embodiment, the base of the detection device is placed on the main support beam, and a steel wire rope of the same specification is directly selected according to the elevator traction wire rope and installed on the preload hydraulic cylinder arm. The hand wheel on the wrap angle adjustment device is turned according to the wrap angle on the traction wheel or the designed wrap angle, so that the wrap angle in the test state is consistent with the wrap angle in the working state. According to the weight of the car counterweight system provided by the elevator manufacturer or the calculated weight of the car and counterweight, the upward braking, downward braking, and no-load traction test conditions are simulated, and the elevator maintenance operation is carried out until the traction wheel and the steel wire rope slip. The three tests are all to ensure the traction force of the traction wheel to prevent the elevator from slipping, hitting the top, shearing, and other accidents that may cause casualties.
[0018] In some embodiments, different equivalent friction coefficients are used to calculate the traction force values for traction wheels with different traction wheel grooves and manufacturing processes; and different friction coefficients are used to calculate the traction force values for different test conditions.
[0019] In this embodiment, according to the requirements of the "Elevator Supervision Inspection and Periodic Inspection Rules" (TSG T7001-2023, hereinafter referred to as the new version of the inspection rules) formulated and revised by the State Administration for Market Regulation on April 2, 2023, the traction capacity test of item A1.3.11 in the rules includes the traction capacity test under no-load conditions and the traction capacity test under loaded conditions. Both tests are to ensure that the traction capacity and braking performance of the elevator under different working conditions (no-load and overload) meet the safety standards and ensure the safe operation of the elevator. In actual operation, the test must be carried out strictly in accordance with the standards and the test results must be recorded to ensure the safety of the elevator.
[0020] The traction capacity test under no-load condition requires that: 1) when the car is unloaded, the counterweight on the car is completely pressed on the buffer, and the main engine continues to be driven to rotate in the upward direction of the elevator. At this time, it is necessary to observe whether the suspension device slips relative to the traction wheel, or whether the driving main engine stops running. 2) When the car is unloaded, it goes up to the upper part of the stroke at the rated speed, cuts off the power supply to the motor and the brake, and observes whether the car (carrying device) stops completely. Principle: The traction capacity test under no-load condition is mainly to verify whether the traction system of the elevator can work normally under no-load conditions and prevent the car from slipping or losing control during operation. By applying a counterweight on the buffer and rotating the driving main engine, the force of the car during operation can be simulated to check whether the friction between the traction wheel and the suspension device is sufficient. Cutting off the power supply to the motor and the brake and observing whether the car stops completely is to check the braking effect of the brake.
[0021] The traction capacity test under loaded conditions requires: load 125% of the rated load in the car, descend to the lower part of the travel at the rated speed, cut off the power supply to the motor and brake, and observe whether the car (carrying device) stops completely. Principle: The traction capacity test under loaded conditions is mainly to verify whether the traction system and braking system of the elevator can work normally under overload conditions, and to ensure that the elevator can stop safely when descending under overload. By loading a load of 125% of the rated load in the car and making it descend, the operating state of the elevator under overload conditions is simulated, and the reliability of the traction system and braking system is checked.
[0022] According to the requirements of the Safety Specifications for Elevator Manufacturing and Installation Part 2: Design Principles, Calculation and Inspection of Elevator Components GB / T7588.2-2020, the traction force of the traction sheave should meet the following requirements: A For car loading and emergency braking conditions, it should comply with the formula: ,in Tj , Ts is the pulling force on the traction sheave, f is the equivalent friction coefficient, α is the wrap angle. For different traction sheave grooves and different processes, the equivalent friction coefficient is fDifferent values, for the U-groove equivalent friction coefficient , where u is the friction coefficient.
[0023] Under car loading and emergency braking conditions, for unhardened grooves , for hardened grooves .
[0024] In the detention condition ; For the friction coefficient u, u=0.1 under loading conditions, u=0.2 under retention conditions, and u=0.1 under emergency braking conditions. .
[0025] The force sensor at the main engine bearing collects data ΔT to calculate the traction force ratio in the circumferential direction of the traction wheel to determine whether it meets the requirements of formulas (1) and (2), that is, to detect whether the traction force of the traction wheel meets the requirements.
[0026] The second aspect of the present invention provides: an elevator host traction force detection system, used to implement any of the above elevator host traction force detection methods, comprising: The installation module is used to install and fix the traction force test device on the target host support beam; and to movably install the test wire rope on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Angle adjustment module, used to adjust the angle adjustment device so that the angle during detection is the same as the actual working condition; The traction force calculation module is used to adjust the first preload hydraulic cylinder and the second preload hydraulic cylinder respectively according to the calculated preload force or the manufacturer's standard preload force; and calculate the test traction force value according to the force sensor data on the host to see whether it meets the preset requirements.
[0027] The third aspect of the present invention provides: a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by a processor, any of the above-mentioned elevator host traction force detection methods is implemented.
[0028] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.
Claims
1. A method for detecting the traction force of an elevator host, characterized in that: The following steps are involved: Install and fix the traction force test device on the target host support beam; A test wire rope is movably installed on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Adjust the wrap angle adjustment device so that the wrap angle during testing is the same as the actual working condition; The first preload hydraulic cylinder and the second preload hydraulic cylinder are respectively adjusted according to the calculated preload force or the manufacturer's standard preload force; The force sensor data on the host is used to calculate whether the test traction force value meets the preset requirements.
2. The elevator main engine traction force detection method according to claim 1, characterized in that: The traction force testing device comprises a traction wheel, a test wire rope is arranged on the traction wheel, a first force sensor and a first preload hydraulic cylinder are arranged at one end of the test wire rope, a second force sensor and a second preload hydraulic cylinder are arranged at the other end of the test wire rope, the test wire rope is movably mounted on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm, and the wrap angle adjustment device comprises an wrap angle adjustment annular rack and a wrap angle adjustment hand wheel; When testing the traction sheave of the target main machine, place the base of the traction force test device on the support beam of the target main machine, select a test wire rope with the same specification as the elevator traction wire of the target main machine and install it on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; turn the wrap angle adjustment hand wheel according to the wrap angle or design wrap angle on the traction sheave to make the wrap angle in the test state consistent with the wrap angle in the working state, simulate the upward braking, downward braking and no-load traction force test conditions according to the car weight and counterweight weight, run the elevator maintenance until the traction sheave and the test wire rope slip, and then test whether the traction force values under different test conditions meet the traction force requirements under the conditions specified in the national standards, and make corresponding adjustments.
3. The elevator main engine traction force detection method according to claim 2, characterized in that: For traction wheels with different traction wheel grooves and manufacturing processes, different equivalent friction coefficients are used to calculate the traction force value; for different test conditions, different friction coefficients are used to calculate the traction force value.
4. An elevator main engine traction force detection system, characterized in that: The method for detecting the traction force of an elevator main engine according to any one of claims 1 to 3 comprises: The installation module is used to install and fix the traction force test device on the target host support beam; and to movably install the test wire rope on the first preload hydraulic cylinder arm and the second preload hydraulic cylinder arm; Angle adjustment module, used to adjust the angle adjustment device so that the angle during detection is the same as the actual working condition; The traction force calculation module is used to adjust the first preload hydraulic cylinder and the second preload hydraulic cylinder respectively according to the calculated preload force or the manufacturer's standard preload force; and calculate the test traction force value according to the force sensor data on the host to see whether it meets the preset requirements.
5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by the processor, the elevator host traction force detection method as described in any one of claims 1-3 is implemented.