Elevator hoisting machine vibration and balance testing device

Abstract

The application belongs to the field of elevator hoisting machine testing, in particular to an elevator hoisting machine vibration and balance testing device, which comprises a stabilizing seat, a detachable separation table is arranged on the top surface of the stabilizing seat, a placing groove is formed in the top surface of the separation table, the placing groove is used for placing and fixing a hoisting machine module, a vibration sensor is fixed to the top of the separation table, and a counterweight is connected to the outer side of the hoisting wheel of the hoisting machine module; through such a setting, the function of comprehensively detecting the vibration state and balance state of the hoisting machine is realized, the problem of the occurrence of the gravity center deviation of the hoisting wheel of the hoisting machine can be determined, and the data of the specific part of the hoisting wheel lacking or increasing in weight can be accurately locked, thereby facilitating the subsequent weight calibration process of the hoisting wheel; it may also be that the hoisting wheel and the rotor are deviated, after such detection, the installation position of the hoisting wheel can also be adjusted according to the angle and weight of the deviation, thereby ensuring the factory quality of the hoisting machine.

Description

Technical Field

[0001] This invention belongs to the field of traction machine testing, specifically a vibration and balance testing device for elevator traction machines. Background Technology

[0002] The elevator traction machine is the core power source of the elevator, responsible for driving the car up and down. It mainly consists of an electric motor, brake, gearbox, and traction sheave. Through the friction between the traction sheave and the steel wire rope, the rotational motion is converted into the linear motion of the car.

[0003] When the traction machine leaves the factory, it must undergo strict vibration and balance testing. Vibration testing uses a vibration meter to measure the amplitude and velocity of key parts such as bearing housings to ensure there is no abnormal resonance. Balance testing uses a balancing machine to correct the mass distribution of the traction sheave and rotor, eliminate static and dynamic imbalances, and avoid operational vibration. These tests aim to ensure the smooth and low-noise operation of the main unit and extend the elevator's lifespan.

[0004] Traditional methods for testing the vibration and balance of traction machines are relatively simple. They often involve first fixing the traction machine, then fixing a vibration detection module to the rigid frame of the traction machine. The module detects vibration to determine the balance and vibration status of the traction machine. However, this method cannot detect in greater depth whether there is a center of gravity misalignment of the traction sheave, whether there is uneven mass, and the specific location and amount of unevenness. It is difficult to provide information for subsequent rectification. Moreover, the fixed traction machine is also prone to vibration leakage due to problems with the fixing platform itself, which can lead to deviations in the vibration detection data.

[0005] Therefore, the present invention provides an elevator traction machine vibration and balance testing device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The elevator traction machine vibration and balance testing device of the present invention includes a stable base, a separable separation platform is provided on the top surface of the stable base, a placement groove is provided on the top surface of the separation platform, the placement groove is used to place and fix the traction machine module, a vibration sensor is fixedly connected to the top of the separation platform, and a counterweight wheel is also included connected to the outside of the traction wheel of the traction machine module. A phase sensor for detecting the rotation angle information of the traction wheel is provided on the outside of the placement groove.

[0008] This setup not only enables comprehensive detection of the vibration and balance status of the traction machine, but also identifies potential issues with the center of gravity of the traction sheave. It precisely pinpoints whether the traction sheave is missing or has added weight, facilitating subsequent weight calibration. It can also detect misalignment between the traction sheave and rotor; this detection allows for repositioning the traction sheave based on the angle and weight of the imbalance, ensuring the traction machine's quality upon delivery. Furthermore, the use of a detachable separation platform effectively amplifies vibration data while minimizing the impact of external factors, improving detection accuracy. The detection process eliminates the need to install vibration sensors on the traction machine; only a secure connection between the traction machine and the separation platform is required, reducing installation complexity and streamlining the process, thus increasing detection efficiency.

[0009] Preferably, two pressing rails are slidably engaged at the bottom inner side of the placement slot, and a movable arm is fixedly connected to the outer side of the pressing rail. The movable arm includes an upper push arm and a lower slide arm. The upper push arm is fixedly connected to the pressing rail and slidably engaged with the separation platform. The bottom of the traction machine module is placed in the placement slot, and the pressing rail is moved towards the center by the two movable arms, thereby locking and fixing the bottom of the traction machine module. A hydraulic device can be installed at the bottom of the stabilizing seat to control the movement of the lower slide arm. The upper push arm is connected to the end of the lower slide arm and is used to push the pressing rail to move.

[0010] Preferably, the top surface of the stabilizer is provided with a locking groove adapted to the separation platform, the bottom of the stabilizer is fixedly connected to a base, and the bottom of the separation platform is fixedly connected to locking components adapted to the inside of the locking groove on both sides. Under normal conditions, the separation platform is partially inserted into the locking groove and the separation platform remains fixed. When separation is required, the separation platform moves upward and is no longer rigidly connected to the stabilizer, reducing the impact of connection gaps on vibration data. When the separation platform is inserted into the locking groove, the locking components ensure a firm connection between the two. The connecting components can be mechanical structures such as bolts.

[0011] Preferably, the top surface of the base is provided with multiple lifting slots, and hydraulic rods are installed in the lifting slots. A telescopic spring is fixed between the hydraulic rod and the top of the separation platform. The hydraulic rod pushes the separation platform upward, so that the separation platform is no longer rigidly connected to the stabilizing seat. The telescopic spring will adapt to the vibration and will not affect the vibration feedback of the separation platform. As the hydraulic rod controls the separation platform to sink, the telescopic spring gradually enters the lifting slot, the vibration gradually decreases, and the separation platform gradually returns to its original position.

[0012] Preferably, side columns are fixed to the top surface of the base at each of the four corners. A winding module is fixed to the inside of each side column, and a steel cable chain is fixed to the winding end of the winding module. The end of the steel cable chain is fixed to the top edge of the separation platform. By gradually winding the steel cable chain through the winding module, the separation platform is pulled upward, completing the separation process of the separation platform and the stabilizing seat. When it is necessary to merge the two, simply release the steel cable chain and let the separation platform slowly lower. A conical positioning pile can be installed at the bottom of the separation platform to assist in the fixing process of the separation platform and the stabilizing seat. The flexible steel cable chain will not affect the vibration state of the separation platform, ensuring the accuracy of data monitoring.

[0013] Preferably, an electric slide rail parallel to the side of the placement groove is fixedly connected to the top surface of the separation platform. The moving end of the electric slide rail is fixedly connected to the phase sensor and also includes a reflector connected to the traction wheel. The reflector is fixed to the outside of the traction wheel. The phase sensor continuously emits detection light in the direction of the traction wheel, and the reflector continuously emits signals, so that the phase sensor can obtain a signal once for each rotation of the traction wheel. By dividing the time equally, the angle state of the traction wheel at every moment can be known. By adapting the vibration information, the required data can be accurately calculated. Since the phase sensor is directly fixed to the separation platform, the detection process will not be affected by vibration. The position is adjusted by the electric slide rail to ensure detection accuracy. The mass of the reflector can be ignored, or the same counterweight can be installed on the opposite side to offset the influence of the reflector.

[0014] Preferably, the counterweight wheel includes a locking wheel, which consists of two semi-circular rings connected by four inclined butt bolts. The locking wheel is connected to the outside of the traction sheave, and an expansion wheel for increasing the counterweight is fixed to the outside of the locking wheel. The locking wheel is fixed in the cable groove of the traction sheave by locking the two semi-circular rings together and then locking them with four butt bolts. The four butt bolts are divided into upper and lower groups, both of which are inserted at an incline for fixing. The expansion wheel is used to fix the counterweight, so it is not necessary to fix the counterweight on the surface of the traction sheave. The surface of the expansion wheel can be provided with threaded grooves, locking grooves, or other slots specifically for fixing the counterweight, which is more secure and convenient than fixing it directly to the traction sheave.

[0015] Preferably, the surface of the expanding wheel has multiple equally angled docking holes, and counterweight rod one and counterweight rod two are provided outside the docking holes. When there is a cable groove at the center of gravity on the surface of the traction wheel, only one counterweight wheel needs to be installed. If there is no such groove, the counterweight wheel can only be installed symmetrically on both sides to ensure that the installed counterweight wheel does not affect the center of gravity of the traction wheel. Then, counterweight rod one and counterweight rod two are connected in the docking holes as needed to complete the work of adding or removing counterweight. The method of reducing counterweight is to install a counterweight of corresponding gravity in the opposite direction.

[0016] Preferably, the end of the first counterweight rod is threaded to the mating hole, and multiple counterweight bars are connected to the outer side of the first counterweight rod. The second counterweight rod has a connecting thread in the middle and a retaining ring at the end of the connecting thread. A device to assist in installing the counterweight can be installed on the outer side of the stabilizer, or the corresponding counterweight rods one and two can be manually fixed in the mating hole according to the information output by the phase sensor and vibration sensor. The second counterweight rod is mainly used when only one counterweight wheel is used. By installing the second counterweight rod on both sides, the edge weight of one of the second counterweight rods is different, which can balance the original center of gravity of the traction wheel. The first counterweight rod is suitable for the installation of two or more counterweight wheels. The required balance state can be adjusted by installing multiple first counterweight rods.

[0017] Preferably, the pressing rail has a bent positioning groove inside, and a mating seat is inserted into the side of the pressing rail facing the traction machine module. The mating seat is connected to the pressing rail by positioning bolts. By adding mating seats of different shapes, different traction machine modules can be adapted. The mating seat is fixed in the positioning groove by positioning bolts from top to bottom.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The elevator traction machine vibration and balance testing device of the present invention not only realizes the function of comprehensively detecting the vibration and balance state of the traction machine, but also determines that the traction sheave of the traction machine has a center of gravity misalignment problem, and accurately pinpoints the specific part of the traction sheave that is missing or has added weight, facilitating the subsequent weight calibration process of the traction sheave; it may also be due to a deviation in the connection between the traction sheave and the rotor. After this detection, the installation position of the traction sheave can be readjusted according to the angle and weight of the imbalance, ensuring the factory quality of the traction machine; at the same time, the design of the detachable separation platform not only effectively amplifies the vibration data, but also reduces the influence of external factors on the vibration data, improving the detection accuracy. In addition, during the detection process, it is not necessary to install the vibration sensor on the traction machine, only to ensure that the traction machine and the separation platform are firmly installed, reducing the installation complexity and process, and improving the detection efficiency.

[0020] 2. The elevator traction machine vibration and balance testing device of the present invention, by setting a placement groove, places the bottom of the traction machine module in the placement groove, and uses two moving arms to move the pressing rail towards the center, thereby locking and fixing the bottom of the traction machine module. The bottom of the stabilizing seat can be equipped with hydraulic equipment to control the movement of the lower arm. The upper push arm is connected to the end of the lower arm and is used to push the movement of the pressing rail. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1This is a perspective view of the base and separation platform of the present invention;

[0023] Figure 2 This is a perspective view of the separation stage and phase sensor of the present invention;

[0024] Figure 3 This is a perspective view of the stabilizer of the present invention;

[0025] Figure 4 This is a perspective view of the base and side columns of the present invention;

[0026] Figure 5 This is a perspective view of the stabilizing seat and pressing rail of the present invention;

[0027] Figure 6 This is a perspective view of the counterweight wheel of the present invention;

[0028] Figure 7 This is a perspective view of the counterweight wheel and counterweight rod II of the present invention;

[0029] In the diagram: 1. Base; 2. Stabilizer; 3. Separation platform; 4. Traction machine module; 5. Placement slot; 6. Vibration sensor; 7. Phase sensor; 8. Moving arm; 9. Locking slot; 10. Lifting slot; 11. Hydraulic rod; 12. Telescopic spring; 13. Side column; 14. Steel cable chain; 15. Upper push arm; 16. Lower slide arm; 17. Electric slide rail; 18. Pressing rail; 19. Pairing seat; 20. Positioning slot; 21. Positioning bolt; 22. Reflector; 23. Counterweight wheel; 24. Engaging wheel; 25. Outward expansion wheel; 26. Connecting bolt; 27. Connecting hole; 28. Counterweight rod one; 29. ​​Counterweight bar; 30. Counterweight rod two; 31. Connecting thread. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 7 As shown in the figure, an elevator traction machine vibration and balance testing device according to an embodiment of the present invention includes a stabilizing base 2, a separable separation platform 3 is provided on the top surface of the stabilizing base 2, a placement groove 5 is provided on the top surface of the separation platform 3, the placement groove 5 is used to place and fix the traction machine module 4, a vibration sensor 6 is fixedly connected to the top of the separation platform 3, and a counterweight wheel 23 is also included connected to the outside of the traction wheel of the traction machine module 4. A phase sensor 7 for detecting the rotation angle information of the traction wheel is provided on the outside of the placement groove 5.

[0032] The traction machine module 4 to be tested is fixed in the placement slot 5, making the traction machine module 4 rigidly connected to the separation platform 3. Then, the separation platform 3 is controlled to move upward until it separates from the stabilizing seat 2. After separation, the traction machine module 4 is powered on to allow it to operate normally. During operation, the traction wheel rotates and the internal motor runs at high speed, generating vibration. Because the traction machine module 4 and the separation platform 3 are rigidly connected, the vibration is directly transmitted to the separation platform 3. Furthermore, since there is no rigid connection between the separation platform 3 and the stabilizing seat 2, the unsupported separation platform 3 will amplify the vibration effect to a certain extent. At the same time, because the separation platform 3 is only rigidly connected to the traction machine module 4, it will only receive the vibration of the traction machine module 4 and will not be affected by issues such as the firmness of its installation. The vibration sensor 6 can monitor the vibration data in real time, including the vibration amplitude and direction. Meanwhile, the phase sensor 7 can observe the rotation state of the traction sheave through optical monitoring, and the phase sensor 7 and the vibration sensor 6 communicate with each other. The vibration and balance of the traction machine module 4 are often affected by the shift of the center of gravity of the traction sheave, which causes large vibrations during rotation. The specific detection process is as follows: First, the traction machine module 4 is started and the vibration amplitude is detected by the vibration sensor 6. At the same time, the timestamp of the highest vibration amplitude is analyzed. This timestamp is matched with the rotation angle information of the traction sheave detected by the phase sensor 7. At this time, the current vibration magnitude and the traction sheave angle when the vibration peak occurs can be obtained. Then, the traction machine module 4 is turned off, and a counterweight is added at the detected traction sheave angle position. The traction machine module 4 is restarted, and the vibration and traction sheave rotation state are detected again to obtain the second set of vibration magnitude and traction sheave angle when the vibration peak occurs.

[0033] By analyzing two sets of information, a counterweight of known mass is added at a known angle to the traction sheave. By comparing the magnitude and phase changes of the vibration vector before and after the addition, the precise location and mass of the original unbalance are calculated using the geometric relationship of vector triangles, thus determining the final counterweight scheme. The specific reverse calculation method is as follows: vector operations are performed using the parallelogram law or triangle law: the original vibration vector A plus the vector B caused by the trial weight equals the composite vector C; given the magnitude and position of A, C, and the counterweight, the direction and magnitude of B can be solved, and thus the location (opposite to the direction of B) and mass (proportional to the magnitude of B) of the unbalance can be deduced.

[0034] At this point, the location and amount of imbalance in the traction sheave have been calculated. The traction machine module 4 is shut down again, the original counterweight is removed, and the calculated counterweight is added to the unbalanced location. The traction machine module 4 is then started for the last time. At this point, the vibration should be stable within the predetermined range.

[0035] This setup not only enables comprehensive detection of the vibration and balance status of the traction machine, but also identifies potential issues with the center of gravity of the traction sheave. It precisely pinpoints whether the traction sheave is missing or has added weight, facilitating subsequent weight calibration. It can also detect misalignment between the traction sheave and rotor; this detection allows for repositioning the traction sheave based on the angle and weight of the imbalance, ensuring the traction machine's quality upon delivery. Furthermore, the use of a detachable separation platform 3 effectively amplifies vibration data while minimizing the impact of external factors, improving detection accuracy. The detection process also eliminates the need to install the vibration sensor 6 on the traction machine; only a secure connection between the traction machine and the separation platform 3 is required, reducing installation complexity and streamlining the process, thus increasing detection efficiency.

[0036] The inner bottom of the placement groove 5 is slidably engaged with two pressing rails 18, and the outer side of the pressing rails 18 is fixedly connected with a moving arm 8. The moving arm 8 includes an upper push arm 15 and a lower slide arm 16. The upper push arm 15 is fixedly connected to the pressing rails 18 and slidably engaged with the separation table 3.

[0037] During operation, the bottom of the traction machine module 4 is placed in the placement slot 5, and the pressing rail 18 is brought closer to the center by the two moving arms 8, thereby locking and fixing the bottom of the traction machine module 4. A hydraulic device can be installed at the bottom of the stabilizing seat 2 to control the movement of the lower arm 16. The upper push arm 15 is connected to the end of the lower arm 16 and is used to push the pressing rail 18 to move.

[0038] The top surface of the stabilizing base 2 is provided with a locking groove 9 that is adapted to the separation platform 3. The bottom of the stabilizing base 2 is fixedly connected to a base 1. The bottom of the separation platform 3 is fixedly connected to locking components that are adapted to the inside of the locking groove 9 on both sides.

[0039] During operation, under normal conditions, the separation platform 3 is engaged in the locking groove 9, and the separation platform 3 remains fixed. When separation is required, the separation platform 3 moves upward, and the separation platform 3 is no longer rigidly connected to the stabilizing seat 2, reducing the impact of connection gap on vibration data. After the separation platform 3 is engaged in the locking groove 9, the locking component ensures a firm connection between the two. The connecting component can use mechanical structures such as bolts.

[0040] The top surface of the base 1 is provided with a plurality of lifting slots 10, and a hydraulic rod 11 is installed in the lifting slot 10. A telescopic spring 12 is fixedly connected between the hydraulic rod 11 and the top of the separation platform 3.

[0041] During operation, the hydraulic rod 11 pushes the separation platform 3 upward, so that the separation platform 3 is no longer rigidly connected to the stabilizing seat 2. The telescopic spring 12 will deform adaptively under vibration, without affecting the vibration feedback of the separation platform 3. As the hydraulic rod 11 controls the separation platform 3 to sink, the telescopic spring 12 gradually enters the lifting groove 10, the vibration gradually decreases, and the separation platform 3 gradually returns to its original position.

[0042] The top surface of the base 1 is fixed with side columns 13 at each of the four corners. A winding module is fixed inside the side column 13. A steel cable chain 14 is fixed to the winding end of the winding module. The end of the steel cable chain 14 is fixed to the edge of the top surface of the separation platform 3.

[0043] During operation, the steel cable chain 14 is gradually wound up by the winding module to pull the separation platform 3 upward, completing the separation process of the separation platform 3 and the stabilizing seat 2. When the two need to be combined, simply release the steel cable chain 14 to allow the separation platform 3 to be slowly lowered. A conical positioning pile can be installed at the bottom of the separation platform 3 to assist in the fixing process of the separation platform 3 and the stabilizing seat 2. The flexible steel cable chain 14 will not affect the vibration state of the separation platform 3, ensuring the accuracy of data monitoring.

[0044] An electric slide rail 17 parallel to the side of the placement groove 5 is fixedly connected to the top surface of the separation platform 3. The moving end of the electric slide rail 17 is fixedly connected to the phase sensor 7, and also includes a reflector 22 connected to the traction wheel.

[0045] During operation, the reflector 22 is fixed to the outside of the traction sheave. The phase sensor 7 continuously emits detection light towards the traction sheave, and the reflector 22 continuously emits signals. This ensures that the phase sensor 7 receives a signal once for each rotation of the traction sheave. By dividing the time equally, the angle state of the traction sheave at every moment can be determined. By adapting to vibration information, the required data can be accurately calculated. Since the phase sensor 7 is directly fixed to the separation table 3, the detection process is not affected by vibration. The position is adjusted by the electric slide rail 17 to ensure detection accuracy. The mass of the reflector 22 is negligible, or an identical counterweight can be installed on the opposite side to counteract the influence of the reflector 22.

[0046] The counterweight wheel 23 includes a locking wheel 24, which is composed of two semi-circular ring structures. The two semi-circular rings are fixed together by four inclined butt bolts 26. The locking wheel 24 is connected to the outside of the traction wheel. An expansion wheel 25 for increasing the counterweight is fixed to the outside of the locking wheel 24.

[0047] During operation, the locking wheel 24 is fixed in the cable groove of the traction sheave. The fixing method is as follows: the two semi-circular rings are locked together and then locked by four connecting bolts 26. The four connecting bolts 26 are divided into upper and lower groups, and are inserted at an angle for fixing. The outer expansion wheel 25 is used to fix the counterweight, so it is not necessary to fix the counterweight on the surface of the traction sheave. The surface of the outer expansion wheel 25 can be opened with threaded grooves, locking grooves and other slots specifically for fixing the counterweight, which is more secure and convenient than fixing it directly to the traction sheave.

[0048] The surface of the outwardly expanding wheel 25 is provided with a plurality of equally angled docking holes 27, and a counterweight rod 28 and a counterweight rod 30 are provided outside the docking holes 27;

[0049] During operation, if there is a cable groove at the center of gravity on the surface of the traction sheave, only one counterweight wheel 23 needs to be installed. If not, the counterweight wheel 23 can only be installed symmetrically on both sides to ensure that it does not affect the center of gravity of the traction sheave. Then, according to the requirements, the first counterweight rod 28 and the second counterweight rod 30 are connected in the docking hole 27 to complete the work of adding or removing the counterweight. The method of reducing the counterweight is to install a counterweight of corresponding weight in the opposite direction.

[0050] The end of the first counterweight rod 28 is threaded to the mating hole 27. Multiple counterweight bars 29 are connected to the outside of the first counterweight rod 28. The second counterweight rod 30 has a connecting thread 31 in the middle and a retaining ring at the end of the connecting thread 31.

[0051] During operation, a device to assist in installing the counterweight can be installed on the outside of the stabilizer 2, or the corresponding counterweight rod 28 and counterweight rod 30 can be manually fixed in the docking hole 27 according to the information output by the phase sensor 7 and the vibration sensor 6. The counterweight rod 30 is mainly used when only one counterweight wheel 23 is used. By installing the counterweight rod 30 on both sides, the edge weight of one of the counterweight rods 30 is different, which can balance the original center of gravity of the traction wheel. The counterweight rod 28 is suitable for the installation of two or more counterweight wheels 23. The required balance state can be adjusted by installing multiple counterweight rods 28.

[0052] The inside of the pressing rail 18 is provided with a bent positioning groove 20. A mating seat 19 is inserted into the side of the pressing rail 18 facing the traction machine module 4. The mating seat 19 is connected to the pressing rail 18 by a positioning bolt 21.

[0053] During operation, different shaped mating seats 19 are added to adapt to different traction machine modules 4, and the mating seats 19 are fixed in the positioning groove 20 by positioning bolts 21 from top to bottom.

[0054] During operation, the traction machine module 4 to be tested is fixed in the placement slot 5, rigidly connecting it to the separation platform 3. The separation platform 3 is then moved upwards until it separates from the stabilizing seat 2. After separation, the traction machine module 4 is powered on, allowing it to operate normally. During operation, the traction wheel rotates, and the internal motor runs at high speed, generating vibration. Because the traction machine module 4 and the separation platform 3 are rigidly connected, the vibration is directly transmitted to the separation platform 3. Furthermore, since there is no rigid connection between the separation platform 3 and the stabilizing seat 2, the unsupported separation platform 3 amplifies the vibration to some extent. Simultaneously, because the separation platform 3 is only rigidly connected to the traction machine module 4, it only receives the vibration from the traction machine module 4 and is not affected by issues such as the firmness of its installation. The vibration sensor 6 can monitor the vibration data in real time, including the amplitude and direction of the vibration. Meanwhile, the phase sensor 7 can observe the rotation state of the traction sheave through optical monitoring, and the phase sensor 7 and the vibration sensor 6 communicate with each other. The vibration and balance of the traction machine module 4 are often affected by the shift of the center of gravity of the traction sheave, which causes large vibrations during rotation. The specific detection process is as follows: First, the traction machine module 4 is started and the vibration amplitude is detected by the vibration sensor 6. At the same time, the timestamp of the highest vibration amplitude is analyzed. This timestamp is matched with the rotation angle information of the traction sheave detected by the phase sensor 7. At this time, the current vibration magnitude and the traction sheave angle when the vibration peak occurs can be obtained. Then, the traction machine module 4 is turned off, and a counterweight is added at the detected traction sheave angle position. The traction machine module 4 is restarted, and the vibration and traction sheave rotation state are detected again to obtain the second set of vibration magnitude and traction sheave angle when the vibration peak occurs.

[0055] By analyzing two sets of information, a counterweight of known mass is added at a known angle to the traction sheave. By comparing the magnitude and phase changes of the vibration vector before and after the addition, the precise location and mass of the original unbalance are calculated using the geometric relationship of vector triangles, thus determining the final counterweight scheme. The specific reverse calculation method is as follows: vector operations are performed using the parallelogram law or triangle law: the original vibration vector A plus the vector B caused by the trial weight equals the composite vector C; given the magnitude and position of A, C, and the counterweight, the direction and magnitude of B can be solved, and thus the location (opposite to the direction of B) and mass (proportional to the magnitude of B) of the unbalance can be deduced.

[0056] At this point, the location and amount of imbalance in the traction sheave have been calculated. The traction machine module 4 is shut down again, the original counterweight is removed, and the calculated counterweight is added to the unbalanced location. The traction machine module 4 is then started for the last time. At this point, the vibration should be stable within the predetermined range.

[0057] This setup not only enables comprehensive detection of the vibration and balance status of the traction machine, but also identifies potential issues with the center of gravity of the traction sheave. It precisely pinpoints whether the traction sheave is missing or has added weight, facilitating subsequent weight calibration. It can also detect misalignment between the traction sheave and rotor; this detection allows for repositioning the traction sheave based on the angle and weight of the imbalance, ensuring the traction machine's quality upon delivery. Furthermore, the use of a detachable separation platform 3 effectively amplifies vibration data while minimizing the impact of external factors, improving detection accuracy. The detection process also eliminates the need to install the vibration sensor 6 on the traction machine; only a secure connection between the traction machine and the separation platform 3 is required, reducing installation complexity and streamlining the process, thus increasing detection efficiency.

[0058] The bottom of the traction machine module 4 is placed in the placement slot 5. The pressing rail 18 is brought closer to the center by the two moving arms 8, thereby locking and fixing the bottom of the traction machine module 4. A hydraulic device can be installed at the bottom of the stabilizing seat 2 to control the movement of the lower arm 16. The upper push arm 15 is connected to the end of the lower arm 16 and is used to push the pressing rail 18 to move.

[0059] Under normal conditions, the separation platform 3 is partially engaged in the locking groove 9, and the separation platform 3 remains fixed. When separation is required, the separation platform 3 moves upward, and the separation platform 3 is no longer rigidly connected to the stabilizing seat 2, reducing the impact of connection gaps on vibration data. After the separation platform 3 is engaged in the locking groove 9, the locking component ensures a firm connection between the two. The connecting component can use mechanical structures such as bolts.

[0060] The hydraulic rod 11 pushes the separation platform 3 upward, so that the separation platform 3 is no longer rigidly connected to the stabilizing seat 2. The telescopic spring 12 will adapt to the vibration and will not affect the vibration feedback of the separation platform 3. As the hydraulic rod 11 controls the separation platform 3 to sink, the telescopic spring 12 gradually enters the lifting groove 10, the vibration gradually decreases, and the separation platform 3 gradually returns to its original position.

[0061] The steel cable chain 14 is gradually wound up by the winding module to pull the separation platform 3 upward, completing the separation process of the separation platform 3 and the stabilizing seat 2. When the two need to be combined, simply release the steel cable chain 14 to allow the separation platform 3 to be slowly lowered. A conical positioning pile can be installed at the bottom of the separation platform 3 to assist in the fixing process of the separation platform 3 and the stabilizing seat 2. The flexible steel cable chain 14 will not affect the vibration state of the separation platform 3, ensuring the accuracy of data monitoring.

[0062] The reflector 22 is fixed to the outside of the traction sheave. The phase sensor 7 continuously emits detection light in the direction of the traction sheave, and the reflector 22 continuously emits signals. This ensures that the phase sensor 7 receives a signal every time the traction sheave rotates. By dividing the time equally, the angle state of the traction sheave at every moment can be known. By adapting the vibration information, the required data can be accurately calculated. Since the phase sensor 7 is directly fixed to the separation table 3, the detection process is not affected by vibration. The position is adjusted by the electric slide rail 17 to ensure detection accuracy. The mass of the reflector 22 is negligible, or the same counterweight can be installed on the opposite side to counteract the influence of the reflector 22.

[0063] The locking wheel 24 is fixed in the cable groove of the traction sheave by locking the two semi-circular rings together and then locking them with four connecting bolts 26. The four connecting bolts 26 are divided into upper and lower groups and are inserted at an angle for fixing. The expansion wheel 25 is used to fix the counterweight, so it is not necessary to fix the counterweight on the surface of the traction sheave. The surface of the expansion wheel 25 can be opened with threaded grooves, locking grooves and other slots specifically for fixing the counterweight, which is more secure and convenient than fixing it directly to the traction sheave.

[0064] When there is a cable groove at the center of gravity on the surface of the traction sheave, only one counterweight wheel 23 needs to be installed. If not, the counterweight wheel 23 can only be installed symmetrically on both sides to ensure that it does not affect the center of gravity of the traction sheave. Then, according to the requirements, the first counterweight rod 28 and the second counterweight rod 30 are connected in the docking hole 27 to complete the work of adding or removing the counterweight. The method of reducing the counterweight is to install a counterweight of corresponding weight in the opposite direction.

[0065] A device to assist in installing the counterweight can be installed on the outside of the stabilizer 2, or the corresponding counterweight rod 28 and counterweight rod 30 can be manually fixed in the docking hole 27 according to the information output by the phase sensor 7 and the vibration sensor 6. The counterweight rod 30 is mainly used when only one counterweight wheel 23 is used. By installing the counterweight rod 30 on both sides, the edge weight of one of the counterweight rods 30 is different, which can balance the original center of gravity of the traction wheel. The counterweight rod 28 is suitable for the installation of two or more counterweight wheels 23. The required balance state can be adjusted by installing multiple counterweight rods 28.

[0066] By adding mating seats 19 of different shapes, different traction machine modules 4 can be adapted, and the mating seats 19 are fixed in the positioning groove 20 by positioning bolts 21 from top to bottom.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration and balance testing device for elevator traction machines, characterized in that: The device includes a stabilizing base, a detachable separation platform on the top surface of the stabilizing base, a placement slot on the top surface of the separation platform for placing and fixing the traction machine module, a vibration sensor fixed to the top of the separation platform, and a counterweight wheel connected to the outside of the traction wheel of the traction machine module. A phase sensor for detecting the rotation angle information of the traction wheel is provided on the outside of the placement slot.

2. The elevator traction machine vibration and balance testing device according to claim 1, characterized in that: The inner bottom of the placement slot is slidably engaged with two pressing rails, and a movable arm is fixedly connected to the outer side of the pressing rails. The movable arm includes an upper push arm and a lower slide arm. The upper push arm is fixedly connected to the pressing rails and slidably engaged with the separation table.

3. The elevator traction machine vibration and balance testing device according to claim 2, characterized in that: The top surface of the stabilizer is provided with a locking groove that is adapted to the separation platform. The bottom of the stabilizer is fixedly connected to a base. The bottom of the separation platform is fixedly connected to locking components that are adapted to the inside of the locking groove on both sides.

4. The elevator traction machine vibration and balance testing device according to claim 3, characterized in that: Multiple lifting slots are provided on the top surface of the base, and hydraulic rods are installed in the lifting slots. A telescopic spring is fixed between the hydraulic rods and the top of the separation platform.

5. The elevator traction machine vibration and balance testing device according to claim 3, characterized in that: The base has side columns fixed to its top surface at each of the four corners. A winding module is fixed inside the side column. A steel cable chain is fixed to the winding end of the winding module. The end of the steel cable chain is fixed to the edge of the top surface of the separation platform.

6. The elevator traction machine vibration and balance testing device according to claim 4 or 5, characterized in that: An electric slide rail parallel to the side of the placement slot is fixedly connected to the top surface of the separation platform. The moving end of the electric slide rail is fixedly connected to the phase sensor and also includes a reflector connected to the traction wheel.

7. The elevator traction machine vibration and balance testing device according to claim 6, characterized in that: The counterweight wheel includes a locking wheel, which consists of two semi-circular ring structures. The two semi-circular rings are fixed together by four inclined butt bolts. The locking wheel is connected to the outside of the traction wheel, and an expansion wheel for increasing the counterweight is fixed to the outside of the locking wheel.

8. The elevator traction machine vibration and balance testing device according to claim 7, characterized in that: The surface of the expanding wheel is provided with multiple docking holes distributed at equal angles, and counterweight rod one and counterweight rod two are provided outside the docking holes.

9. The elevator traction machine vibration and balance testing device according to claim 8, characterized in that: The end of the first counterweight rod is threaded to the mating hole, and multiple counterweight bars are connected to the outer side of the first counterweight rod. The middle part of the second counterweight rod is provided with a connecting thread, and the end of the connecting thread is provided with a retaining ring.

10. The elevator traction machine vibration and balance testing device according to claim 9, characterized in that: The pressing rail has a bent positioning groove inside, and a mating seat is inserted into the side of the pressing rail facing the traction machine module. The mating seat is connected to the pressing rail by positioning bolts.

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