Elevator traction machine working condition simulation test equipment and test method

Abstract

The present invention relates to an elevator traction machine working condition simulation test equipment and test method, the equipment includes a base, a traction machine, a load machine, a tension wheel assembly, a driving component, and a radial load measuring component, the traction machine includes a power component and a traction wheel, the power component is used to drive the traction wheel to rotate around a first direction; the load machine output shaft is connected to one end of the connecting shaft, the load machine is used to drive the connecting shaft to rotate around a second direction, the other end of the connecting shaft is connected to the power component output shaft, the first direction is opposite to the second direction; the tension wheel assembly includes a tension wheel located below the traction wheel, and a steel wire rope is sleeved between the traction wheel and the tension wheel; the driving component is used to control the tensioning operation of the tension wheel on the steel wire rope; the radial load measuring component is arranged on the tension wheel assembly, the output shaft of the driving component always presses the radial load measuring component, and the radial load measuring component is used to measure the pressure applied by the driving component. The equipment and method of the present invention simulate the on-site working condition of the traction machine and realize the working condition measurement and control feedback of the traction machine.

Description

Technical Field

[0001] The invention belongs to the field of industrial equipment, and in particular relates to an elevator traction machine working condition simulation test device and a test method. Background Art

[0002] The working condition detection of the traction machine (including brakes and motors) in the existing technology is complicated and cannot be automatically detected. If a fault occurs, it is not easy to find the cause of the fault, and the actual measurement is time-consuming and cumbersome. In particular, it is difficult to operate at the hoistway installation site, and the manual maintenance cost is high. In addition, the elevator needs to work normally, and it is impossible to simulate detection and feedback problems at all times. Summary of the invention

[0003] The object of the present invention is to provide an elevator traction machine working condition simulation test device and test method to achieve traction machine working condition measurement and control feedback.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An elevator traction machine working condition simulation test device, comprising a base, a traction machine to be tested arranged on the base, a load machine, a tensioning wheel assembly, a driving component, and a radial load measuring component, wherein the traction machine and the load machine are connected via a connecting shaft, the traction machine comprises a power assembly, and a traction wheel arranged on an output shaft of the power assembly, wherein the power assembly is used to drive the traction wheel to rotate around a first direction;

[0006] The load machine has an output shaft, the output shaft of the load machine is connected to one end of the connecting shaft, the load machine is used to drive the connecting shaft to rotate around a second direction, the other end of the connecting shaft is connected to the output shaft of the power assembly, and the first direction is opposite to the second direction;

[0007] The tension wheel assembly comprises a tension wheel located below the traction wheel, and a steel wire rope is sleeved between the traction wheel and the tension wheel;

[0008] The driving component is used to control the tensioning operation of the tensioning wheel on the wire rope;

[0009] The radial load measuring component is arranged on the tension wheel assembly, and the output shaft of the driving component always presses against the radial load measuring component, and the radial load measuring component is used to measure the pressure after the driving component and the radial load measuring component are pressed against each other.

[0010] Preferably, the tensioning wheel assembly also includes a first bracket and a second bracket, the first bracket is fixedly arranged on the base and located below the traction wheel, the roller shaft of the tensioning wheel is connected to the second bracket, the radial load measuring component is arranged on the second bracket and located between the driving component and the second bracket, and the driving component is used to drive the second bracket to move along the height direction of the first bracket to tension the wire rope.

[0011] Preferably, the driving component is a hydraulic cylinder or a jack.

[0012] Preferably, the power assembly includes a brake, a motor, and a reducer connected to the output shaft of the motor, the traction wheel is connected to the output shaft of the reducer, the brake is arranged on the motor and the reducer, and the brake is used for braking the traction wheel.

[0013] Preferably, the radial load measuring component is a pressure sensor.

[0014] Preferably, the output shaft of the load machine is connected to one end of the connecting shaft via a coupling, and the other end of the connecting shaft is connected to the output shaft of the power assembly via a universal coupling.

[0015] Preferably, a torque sensor is provided on the connecting shaft, and the torque sensor is used to measure the torque of the connecting shaft.

[0016] Preferably, the device also includes a first controller, a second controller, and an alarm. The first controller is used to control the operation of the load machine, and the second controller is used to control the operation of the traction machine. The traction machine also includes an encoder arranged on the power assembly. The alarm is connected to the second controller, and the second controller triggers the alarm to operate according to the detection result of the encoder.

[0017] A test method for simulating the working condition of an elevator traction machine, the method using an elevator traction machine working condition simulation test device, comprising the following steps:

[0018] S1, start the traction machine and the load machine, the load machine drives the connecting shaft to rotate to output the eccentric load torque of the preset threshold value, and adjusts the tensioning wheel so that the radial load on the traction wheel reaches the set load value;

[0019] S2, after a delay of a first preset time, the traction machine performs self-detection;

[0020] S3, if the self-test passes, proceed to step S4; if the self-test fails, the traction machine is unqualified;

[0021] S4, the load machine stops driving, and after a delay of the second preset time, the brake of the traction machine is powered on to release the brake, and then the traction machine is controlled to run within the third preset time;

[0022] S5. Repeat steps S1-S4.

[0023] Preferably, in step S2, the self-detection performed by the traction machine includes brake force detection, brake response detection or fault detection.

[0024] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention relates to an elevator traction machine operating condition simulation test equipment and test method, which can realize automatic detection, feedback, and alarm functions of the traction machine operating condition, and realize intelligent measurement and control feedback of the traction machine operating condition; by using this equipment, the on-site working condition of the traction machine is simulated at all times, and there is no need for on-site detection, thereby reducing manual maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 A three-dimensional diagram of an elevator traction machine working condition simulation test device of the present invention;

[0026] Attached Figure 2 It is a front view of the elevator traction machine working condition simulation test equipment of the present invention;

[0027] Attached Figure 3 It is a side view of the elevator traction machine working condition simulation test equipment of the present invention.

[0028] In the above attached figure:

[0029] 1-first base, 2-second base, 3-third base, 4-frame, 5-brake, 6-traction wheel, 7-wire rope, 8-connecting shaft, 9-first bearing assembly, 10-torque sensor, 11-second bearing assembly, 12-load machine, 13-tensioning wheel, 14-radial load measuring component, 15-first bracket, 16-second bracket, 17-tensioning wheel roller, 18-driving component, 19-guide hole. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0031] like Figures 1 to 3 The elevator traction machine working condition simulation test equipment shown includes a base, a traction machine to be tested arranged on the base, a load machine 12, a tensioning wheel 13 assembly, a driving component 18, and a radial load measuring component 14. The traction machine and the load machine 12 are connected by a connecting shaft 8. The traction machine is the traction machine used in an actual elevator.

[0032] The traction machine includes a power assembly and a traction wheel 6 arranged on an output shaft of the power assembly, and the power assembly is used to drive the traction wheel 6 to rotate around a first direction.

[0033] The power assembly includes a brake 5, a motor, and a reducer connected to the output shaft of the motor. The traction wheel 6 is connected to the output shaft of the reducer. The brake 5 is arranged on the motor and the reducer. The brake 5 is used to brake the traction wheel 6. The brake 5 is used to brake the traction wheel 6, that is, the brake 5 can lock the traction wheel 6 to prevent it from rotating.

[0034] The load machine 12 has an output shaft, which is connected to one end of the connecting shaft 8. The load machine 12 is used to drive the connecting shaft 8 to rotate around the second direction. The other end of the connecting shaft 8 is connected to the output shaft of the power assembly. The output shaft of the load machine 12, the output shaft of the power assembly, and the axis of the connecting shaft 8 are the same straight line. The first direction is opposite to the second direction. For example, when the traction wheel 6 rotates clockwise, the connecting shaft 8 rotates counterclockwise. The load machine 12 is used to output a reverse equivalent eccentric load torque to simulate the eccentric load caused by the mass difference between the car and the counterweight. The load machine 12 is a motor, which can output 1.1 times the rated torque of the motor according to national standards.

[0035] The output shaft of the load machine 12 is connected to one end of the connecting shaft 8 through a coupling, and the other end of the connecting shaft 8 is connected to the output shaft of the power assembly through a universal coupling.

[0036] The tensioning wheel 13 assembly includes a tensioning wheel 13 located below the traction wheel 6, and a steel wire rope 7 is sleeved between the traction wheel 6 and the tensioning wheel 13. The driving component 18 is used to control the tensioning operation of the tensioning wheel 13 on the steel wire rope 7. The radial load measuring component 14 is arranged on the tensioning wheel 13 assembly, and the output shaft of the driving component 18 always presses the radial load measuring component 14. The radial load measuring component 14 is used to measure the pressure applied by the driving component 18 on the radial load measuring component 14, that is, to detect the radial load on the traction wheel 6.

[0037] A steel wire rope 7 is sleeved between the traction sheave 6 and the tensioning sheave 13. The radial load on the traction sheave 6 is changed by adjusting the position of the tensioning sheave (adjusting the position of the tensioning sheave 13 to obtain the required radial load), thereby simulating the radial load on the main engine traction sheave 6 and simulating the influence of the main shaft deformation on the braking torque on site.

[0038] The tension wheel 13 assembly also includes a first bracket 15 and a second bracket 16. Figure 2The first bracket 15 is fixedly arranged on the base and is located below the traction wheel 6. The roller shaft of the tensioning wheel 13 is connected to the second bracket 16. The radial load measuring component 14 is arranged on the second bracket 16 and is located between the driving component 18 and the second bracket 16. The driving component 18 is used to drive the radial load measuring component 14 and the second bracket 16 to move along the height direction of the first bracket 15 to tension the wire rope 7, that is, the driving component 18 is used to drive the tensioning wheel 13 to move downward. The radial load measuring component 14 is fixed on the second bracket 16. The output shaft of the driving component 18 always presses the radial load measuring component 14. When the output shaft moves downward, the radial load measuring component 14 and the second bracket 16 move downward. When the radial load measured by the radial load measuring component 14 reaches the set value, the driving component 18 stops driving.

[0039] The radial load measuring component 14 is a pressure sensor. When the driving component 18 applies pressure to the radial load measuring component 14, the radial load measuring component 14 can display the pressure value, which is the radial load on the traction sheave 6. The driving component 18 is a hydraulic cylinder or a jack. The driving component 18 is used to apply radial pressure to the traction sheave 6 of the traction machine to simulate the hanging load, and the pressure is conveniently adjustable.

[0040] A vertical long strip guide hole 19 is provided on the first bracket 15, and a connecting piece is provided on the second bracket 16. The connecting piece can pass through the guide hole 19 on the first bracket 15, so that the second bracket 16 can move along the guide hole 19. When the radial load measured by the radial load measuring component 14 is less than the set value, the driving component 18 drives the radial load measuring component 14 and the second bracket 16 to move downward, tightens the wire rope 7, and stops driving the driving component 18 until the radial load measured by the radial load measuring component 14 reaches the set value; when the radial load measured by the radial load measuring component 14 is greater than the set value, the driving shaft of the driving component 18 contracts, loosens the wire rope 7, and moves the second bracket 16 upward until the radial load measured by the radial load measuring component 14 reaches the set value.

[0041] The device also includes a first controller (i.e., a frequency converter), a second controller (i.e., a frequency converter), and an alarm. The first controller is used to control the operation of the load machine 12, and the second controller is used to control the operation of the traction machine. The traction machine also includes an encoder arranged on the power component. The encoder and the alarm are connected to the second controller. The second controller triggers the alarm according to the detection result of the encoder. When the number of encoder pulses exceeds the rated value, the second controller triggers the alarm to report an error.

[0042] A torque sensor 10 is provided on the connecting shaft 8 , and the torque sensor 10 is used to measure the torque of the connecting shaft 8 , that is, the torque output by the load machine 12 .

[0043] Through the application of pressure sensors and torque sensors 10, the size and change pattern of the load can be monitored in real time, providing effective data support for fault simulation.

[0044] The device also includes a first bearing assembly 9 and a second bearing assembly 11. The first bearing assembly 9 and the second bearing assembly 11 are sleeved on the connecting shaft 8. The first bearing assembly 9 and the second bearing assembly 11 include a bearing seat and a bearing located in the bearing seat to improve the stability of the rotation of the connecting shaft 8. The torque sensor 10 is located between the first bearing assembly 9 and the second bearing assembly 11.

[0045] The base includes a first base 1, a second base 2, and a third base 3. The first base 1, the second base 2, and the third base 3 are arranged side by side in sequence. The load machine 12 is arranged on the first base 1, the first bearing assembly 9 and the second bearing assembly 11 are connected to the second base 2, the traction machine is arranged on the third base 3, and the first bracket 15 of the tensioning wheel 13 assembly is fixedly arranged on the third base 3.

[0046] A test method for simulating the working condition of an elevator traction machine using an elevator traction machine working condition simulation test device comprises the following steps:

[0047] S1, start the traction machine and the load machine 12, the first controller controls the load machine 12 to drive the connecting shaft 8 to rotate to output an eccentric load torque of a preset threshold value, and adjusts the tensioning wheel 13 so that the radial load on the traction wheel 6 reaches a set load value;

[0048] S2. After the first preset time is delayed, the second controller controls the traction machine to perform self-detection. If it is for the brake 5, the self-detection includes brake force detection, brake response detection or fault detection. Brake force detection refers to whether the brake is applied within the specified time. Brake response detection refers to how long it takes to respond. Fault detection refers to how long the brake fails to hold or whether it can be braked within the specified time. The first preset time range is within 30 seconds. If it is for a power component such as a motor, the motor rotation angle (torque detection angle), torque (torque detection pulse number), speed, life, reliability, etc. can be tested. If it is for the traction machine as a whole, the life, reliability, stability, etc. can be tested.

[0049] S3, if the self-test passes, proceed to step S4; if the self-test fails, the traction machine is unqualified;

[0050] S4, the load machine 12 stops driving, and after a delay of the second preset time, the second controller energizes the brake 5 of the traction machine to release the brake, and then controls the traction machine to run within the third preset time, the second preset time range is within 30 seconds, and the third preset time range is 30 seconds-1 minute. Controlling the traction machine to run within the third preset time specifically refers to the power component of the traction machine running randomly in the forward / reverse direction for 30s-1min, such as forward rotation for 30s-1min, or reverse rotation randomly running for 30s-1min, or forward rotation for 30s-1min and then reverse rotation randomly running for 30s-1min, or reverse rotation randomly running for 30s-1min and then forward rotation for 30s-1min;

[0051] S5. Repeat steps S1-S4. If an error (alarm) occurs, the test stops. If no error (alarm) occurs, repeat steps S1-S4 according to a predetermined operation cycle to better simulate the on-site working conditions.

[0052] The scheduled operation cycle refers to: the operation cycle calculated based on the life and working system of the traction machine, such as a few weeks or months.

[0053] The testing equipment and method according to the present application can test whether a problem occurs to the traction machine in a short time or a long time, so as to better simulate the on-site working conditions.

[0054] The following tests can be performed using the elevator traction machine working condition simulation test equipment of the present application:

[0055] Assumed qualified conditions: In order to control the rhythm of the test, it is assumed that the number of self-detection test runs reaches the number of times the elevator operates normally for five years, and no insufficient braking force fault or braking fault is reported, then the tested product is considered qualified.

[0056] 1. Comparative test with and without radial load: When other test conditions are the same, test with and without radial load respectively until controller 2 reports insufficient braking force fault or brake fault, and compare the number of self-tests. If the number is similar, it is considered that the radial load has no effect or little effect on the insufficient braking force fault or brake fault. Otherwise, it is considered to have an effect and consider increasing the rigidity of the host.

[0057] 2. Comparative test on whether the brakes are pre-running-in before leaving the factory: Starting from the end of November 2018, a pre-running-in process was added for the delivery of Wuxi Hengxin brakes. Currently, no effective feedback information has been received from the site (not yet delivered for use). However, it is known that reports of insufficient braking force or braking failure are all caused by brakes that have not been pre-running-in. Therefore, a comparative test is conducted on the two brakes in the factory status to verify the effectiveness of the running-in process.

[0058] 3. Comparative tests can be conducted on brakes from different manufacturers;

[0059] 4. Comparative tests can be conducted on controllers from different manufacturers;

[0060] 5. Comparative tests can be conducted on the same brake by changing the friction pad / brake surface material, contact surface state, spring force, etc.

[0061] The elevator traction machine working condition simulation test equipment of the present application can also be used to detect the motor working state (simulating the car load and counterweight eccentric load), performance detection; and overall performance detection of the traction machine.

[0062] The present invention relates to an elevator traction machine working condition simulation test device, which can realize the functions of automatic detection, feedback and alarm of the traction machine working condition, transmit the detection result to a controller for judgment and control, and realize intelligent measurement and control feedback of the traction machine working condition; by simulating the on-site working condition of the traction machine at all times through this device, there is no need for on-site detection, and the cost of manual maintenance is reduced.

[0063] Compared with the traditional hoistway test, the elevator traction machine working condition simulation test equipment is relatively small in space usage, compact and simple in structure, safe and reliable, low in testing cost, and convenient for maintenance. The traction machine and tensioning wheel assembly adopts a split design, which makes it easy to adjust the mounting wire rope and saves time and effort.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An elevator traction machine working condition simulation test equipment, characterized in that: The traction machine comprises a base, a traction machine to be tested arranged on the base, a load machine, a tension wheel assembly, a driving component, and a radial load measuring component. The traction machine and the load machine are connected via a connecting shaft. The traction machine comprises a power assembly and a traction wheel arranged on an output shaft of the power assembly. The power assembly is used to drive the traction wheel to rotate around a first direction. The load machine has an output shaft, the output shaft of the load machine is connected to one end of the connecting shaft, the load machine is used to drive the connecting shaft to rotate around a second direction, the other end of the connecting shaft is connected to the output shaft of the power assembly, and the first direction is opposite to the second direction; the output shaft of the load machine is connected to one end of the connecting shaft through a coupling, and the other end of the connecting shaft is connected to the output shaft of the power assembly through a universal coupling; The tension wheel assembly comprises a tension wheel located below the traction wheel, and a steel wire rope is sleeved between the traction wheel and the tension wheel; The driving component is used to control the tensioning operation of the tensioning wheel on the wire rope; The radial load measuring component is arranged on the tension wheel assembly, and the output shaft of the driving component always presses against the radial load measuring component, and the radial load measuring component is used to measure the pressure after the driving component and the radial load measuring component press against each other; The tensioning wheel assembly further comprises a first bracket and a second bracket, wherein the first bracket is fixedly arranged on the base and located below the traction wheel, the roller shaft of the tensioning wheel is connected to the second bracket, the radial load measuring component is arranged on the second bracket and located between the driving component and the second bracket, and the driving component is used to drive the second bracket to move along the height direction of the first bracket to tension the steel wire rope; The radial load measuring component is a pressure sensor; The connecting shaft is provided with a torque sensor, and the torque sensor is used to measure the torque of the connecting shaft; The power assembly includes a brake, a motor, and a reducer connected to the output shaft of the motor. The traction wheel is connected to the output shaft of the reducer. The brake is arranged on the motor and the reducer, and the brake is used for braking the traction wheel.

2. The elevator traction machine working condition simulation test equipment according to claim 1, characterized in that: The driving component is a hydraulic cylinder or a jack.

3. The elevator traction machine working condition simulation test equipment according to claim 1, characterized in that: The device also includes a first controller, a second controller, and an alarm. The first controller is used to control the operation of the load machine, and the second controller is used to control the operation of the traction machine. The traction machine also includes an encoder arranged on the power assembly. The alarm is connected to the second controller, and the second controller triggers the alarm to operate according to the detection result of the encoder.

4. A test method for simulating the working condition of an elevator traction machine, characterized in that: The method adopts the elevator traction machine working condition simulation test equipment according to any one of claims 1 to 3, and comprises the following steps: S1, start the traction machine and the load machine, the load machine drives the connecting shaft to rotate to output the eccentric load torque of the preset threshold value, and adjusts the tensioning wheel so that the radial load on the traction wheel reaches the set load value; S2, after a delay of a first preset time, the traction machine performs self-detection; S3, if the self-test passes, proceed to step S4; if the self-test fails, the traction machine is unqualified; S4, the load machine stops driving, and after a delay of the second preset time, the brake of the traction machine is powered on to release the brake, and then the traction machine is controlled to run within the third preset time; S5, repeat steps S1-S4; In step S2, the traction machine performs self-detection including brake force detection, brake response detection or fault detection.

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