Method for testing braking performance of a brake

Abstract

The application relates to a brake braking performance test method, which comprises a test site layout, a sensor arrangement, a brake installation, a weight counterweight, weight lifting, a braking test and parameter collection. Through reasonable layout of the test site, the working condition of the descending braking can be accurately simulated, more accurate test data can be obtained, and the safety guarantee performance of the brake can be effectively verified; meanwhile, the dynamic braking torque of the measured brake is directly collected through the rotating speed and torque sensor, the parameter source is direct and accurate, and the test precision is improved.

Description

Technical Field

[0001] This invention relates to the field of special equipment testing technology, and in particular to a method for testing the braking performance of a brake. Background Technology

[0002] Cranes and elevators are electromechanical equipment used for vertical lifting operations, where the heavy objects being lifted and moved are characterized by their weight and size. To ensure operational safety, the lifting mechanism is equipped with a braking device, which is used to stop the moving mechanism quickly within a certain time or stroke. At the same time, the braking device is also used to keep the suspended load stationary in mid-air during the lifting process.

[0003] To ensure the reliability of brakes, appropriate tests are necessary. Existing testing methods typically employ inertia simulation, which amplifies the torque of the main shaft rotation using an inertia disk and collects operating parameters during braking to obtain the braking force. However, this method cannot simulate the actual working conditions of cranes or elevators, and the braking force is calculated from the inertia and deceleration of the rotating system, introducing errors due to the indirect source of these parameters. Therefore, this method cannot accurately evaluate the safety performance of brakes used for safety assurance. Summary of the Invention

[0004] To address the shortcomings of existing production technologies, this applicant provides a method for testing the braking performance of a brake. By rationally arranging the test site, the method can accurately simulate the braking conditions of a crane or elevator hoisting mechanism during descent, thereby obtaining more accurate test data and effectively verifying the safety performance of the brake used on the hoisting mechanism. Simultaneously, the dynamic braking torque of the brake under test is directly acquired through a speed and torque sensor, providing a direct and accurate parameter source and improving test accuracy.

[0005] The technical solution adopted in this invention is as follows:

[0006] A method for testing the braking performance of a brake includes the following steps:

[0007] S1. Test site setup: The test system is used to test the brake under test. The test system includes two columns fixed on the ground. The tops of the two columns are connected by a crossbeam. Fixed pulleys and a fixed pulley group are installed on the crossbeam. A movable pulley group is connected to the bottom of the fixed pulley group by a wound steel wire rope. The movable end of the wound steel wire rope is connected to a weight. The fixed end of the wound steel wire rope is fixed to the crossbeam. The movable pulley group is connected to the cable car by a traction steel wire rope. A main shaft is set in the middle of the cable car. One end of the main shaft is connected to the output end of the drive motor through a clutch. The other end of the main shaft extends to the outside of the cable car.

[0008] S2. Sensor arrangement: The sensors used in the test include noise sensors, temperature sensors, speed and torque sensors, tension sensors, and wire sensors.

[0009] The noise sensor is positioned 1m above the ground and 1m away from the friction pad outlet of the brake being tested.

[0010] The temperature sensor's detection head is aligned with the friction pad outlet of the brake being tested;

[0011] The speed and torque sensor is located at the end of the spindle;

[0012] The tension sensor is positioned at the connection point between the wound steel wire rope and the crossbeam;

[0013] The main body of the pull-wire sensor is arranged on the crossbeam, and the pull head of the pull-wire sensor is fixed to the top of the weight.

[0014] S3. Brake installation: Install the brake assembly of the brake under test onto the spindle head using threaded fasteners;

[0015] S4. Weight counterweight: Calculate the required mass M of the weight based on the rated torque Me of the brake being tested;

[0016] S5. The weight is lifted, the clutch is engaged, the drive motor is started, the drive motor drives the cable car through the main shaft to retrieve the traction steel wire rope, the traction steel wire rope pulls down the pulley block, and the movable pulley block makes the weight rise vertically by winding the steel wire rope.

[0017] S6. Braking Test: The position signal of the weight is obtained through the pull-wire sensor. When the weight rises to the set position, the drive motor stops, the clutch disengages, and the tested brake opens. The weight falls under the action of gravity and rises vertically through the winding steel wire rope of the movable pulley group. During the ascent, the movable pulley group drives the cable car to rotate in the direction of releasing the traction steel wire rope through the traction steel wire rope. The main shaft rotates with the cable car and moves at the same speed as the cable car. The speed of the main shaft is obtained in real time through the speed and torque sensor. When the speed of the main shaft reaches the set speed, the tested brake is applied to decelerate the descent of the weight until it stops.

[0018] S7. Parameter acquisition: The dynamic braking torque of the brake under test is directly acquired through the speed and torque sensor.

[0019] The braking distance ΔH of the tested brake is obtained by the following formula:

[0020]

[0021] In the formula, π represents pi, D represents the nominal diameter of the cable car winding mechanism, ω represents the initial rotational speed of the cable car, ω is the set rotational speed, and Δt represents the braking time.

[0022] Before the brake under test is engaged, the efficiency η1 of the wire rope pulley system can be calculated based on the speed v of the cable sensor and the initial rotational speed ω of the cable car.

[0023]

[0024] In the formula, π represents the value of pi, D represents the nominal diameter of the cable car winding mechanism, and n represents the ratio of the winding steel wire rope.

[0025] The pull-wire sensor collects the descent acceleration and braking deceleration of the weight in real time, reflecting the details of the braking process and the changes in braking torque, thereby reflecting the changes in the coefficient of friction in real time.

[0026] The noise sensor collects the noise level of the brake under test during braking in real time.

[0027] The temperature sensor collects the temperature change of the friction pads during the braking process of the brake under test in real time.

[0028] As a further improvement to the above technical solution:

[0029] In S1, the cable car is mounted on a mounting base. Several parallel slide rails are installed on the top of the mounting base, and each slide rail is fitted with a slider. The slider is installed at the bottom of the cable car. A servo motor is also installed on the top of the mounting base. The output end of the servo motor is connected to the cable car through a lead screw. The servo motor drives the cable car to reciprocate linearly along the slide rails through the lead screw, so that the entry angle and exit angle of the traction wire rope on the cable car are consistent with the working angle of the hoisting mechanism.

[0030] The mounting base and the column are fitted with a first roller and a second roller. A traction steel wire rope is wound around the outer circumference of the first roller and the second roller. The vertical section of the traction steel wire rope is on the same straight line as the rotation center of the movable pulley group through the first roller and the second roller.

[0031] The temperature sensor is an infrared thermometer.

[0032] In S3, select the appropriate braking couple according to the model and specifications of the brake being tested;

[0033] For drum brakes, the brake wheel is selected as the braking element;

[0034] For disc brakes, the brake disc is selected as the braking element.

[0035] In S4, the tension F on the traction wire rope is calculated according to (Equation 1):

[0036] (Equation 1)

[0037] In the formula, Me represents the rated torque of the brake being tested, and D represents the nominal diameter of the cable car winding mechanism;

[0038] The required mass M of the weight is calculated using equation (2):

[0039] (Equation 2)

[0040] In the formula, F represents the tension on the traction wire rope, n represents the ratio of the winding wire rope, and g represents the acceleration due to gravity.

[0041] The multiplier n of the wound wire rope is related to the number a of the number of turns a of the wound wire rope around the movable pulley block 5, n=2a.

[0042] In S4, the error range of the required weight M of the weight is ±10%, and the actual weight of the weight can be obtained through the tension sensor.

[0043] The beneficial effects of this invention are as follows:

[0044] This invention features a compact and reasonable structure, and is easy to operate. By rationally arranging the test site, it can accurately simulate the working conditions of the descent braking of a crane or elevator lifting mechanism, thereby obtaining more accurate test data and effectively verifying the safety performance of the brake. At the same time, the dynamic braking torque of the brake under test is directly collected by the speed and torque sensor, and the parameter source is direct and accurate, improving the test accuracy.

[0045] The present invention also has the following advantages:

[0046] (1) The test site is easy to set up in this invention. The various structures in the test system are connected by threaded fasteners, and the connection performance is stable and reliable and easy to disassemble and assemble.

[0047] (2) In this invention, various types of sensors are arranged, which can simultaneously measure the multi-dimensional parameters of the brake under test. These parameters can be used as source data for in-depth research on the brake and provide reference data for the design and research of the brake.

[0048] (3) In this invention, by setting up pulley assembly and reasonably designing the layout of the winding steel wire rope, higher test requirements can be achieved with smaller weights, reducing the weight requirements, reducing the number of weights, reducing the weight handling formula, and effectively improving test efficiency. Attached Figure Description

[0049] Figure 1 This is a top view of the present invention.

[0050] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0051] Figure 3 This is the front view of the present invention.

[0052] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0053] The components include: 1. Column; 2. Crossbeam; 3. Fixed pulley; 4. Fixed pulley block; 5. Movable pulley block; 6. First roller; 7. Second roller; 8. Roller mounting base; 9. Winding wire rope; 10. Traction wire rope; 11. Mounting base; 12. Slide rail; 13. Slider; 14. Servo motor; 15. Lead screw; 16. Drive motor; 17. Cable car; 18. Main shaft; 19. Clutch; 20. Noise sensor; 21. Temperature sensor; 22. Speed ​​and torque sensor; 23. Tension sensor; 24. Wire sensor; 25. Weight. Detailed Implementation

[0054] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0055] Example 1:

[0056] like Figures 1-4 As shown, a method for testing the braking performance of a brake includes the following test steps:

[0057] S1. Test site setup: The test system is used to test the brake under test. The test system includes two columns 1 fixed on the ground. The tops of the two columns 1 are connected by a crossbeam 2. Fixed pulleys 3 and fixed pulley groups 4 are installed on the crossbeam 2. The fixed pulley groups 4 are connected to a movable pulley group 5 by a wound steel wire rope 9. The movable end of the wound steel wire rope 9 is connected to a weight 25. The fixed end of the wound steel wire rope 9 is fixed to the crossbeam 2. The movable pulley group 5 is connected to a cable car 17 by a traction steel wire rope 10. A main shaft 18 is set in the middle of the cable car 17. One end of the main shaft 18 is connected to the output end of the drive motor 16 through a clutch 19. The other end of the main shaft 18 extends to the outside of the cable car 17.

[0058] S2. Sensor arrangement: The sensors used in the test include noise sensor 20, temperature sensor 21, speed and torque sensor 22, tension sensor 23 and pull wire sensor 24.

[0059] The noise sensor 20 is positioned 1m above the ground and 1m away from the friction pad outlet of the brake being tested.

[0060] The detection head of temperature sensor 21 is aligned with the friction pad outlet of the brake being tested;

[0061] The speed and torque sensor 22 is located at the end of the spindle 18;

[0062] The tension sensor 23 is located at the connection point between the wound steel wire rope 9 and the crossbeam 2;

[0063] The body of the pull-wire sensor 24 is arranged on the crossbeam 2, and the pull head of the pull-wire sensor 24 is fixed to the top of the weight 25.

[0064] S3. Brake installation: Install the brake assembly of the brake under test onto the head of the spindle 18 using threaded fasteners;

[0065] S4. Weight counterweight: Calculate the required mass M of weight 25 based on the rated torque Me of the brake being tested;

[0066] S5. The weight is lifted, which engages the clutch 19 and starts the drive motor 16. The drive motor 16 drives the cable car 17 through the main shaft 18 to retrieve the traction steel wire rope 10. The traction steel wire rope 10 pulls down the pulley block 5. The movable pulley block 5 causes the weight 25 to rise vertically by winding the steel wire rope 9.

[0067] S6. Braking test: The position signal of the weight 25 is obtained by the pull wire sensor 24. When the weight 25 rises to the set position, the drive motor 16 stops, the clutch 19 disengages, the test brake opens, and the weight 25 falls under the action of gravity. It rises vertically by winding the steel wire rope 9 and the movable pulley group 5 rises vertically by winding the steel wire rope 9. During the rise, the movable pulley group 5 drives the cable car 17 to rotate in the direction of releasing the traction steel wire rope 10 through the traction steel wire rope 10. The main shaft 18 rotates with the cable car 17 and moves at the same speed as the cable car 17. The speed of the main shaft 18 is obtained in real time by the speed and torque sensor 22. When the speed of the main shaft 18 reaches the set speed, the test brake is engaged to decelerate the descent of the weight 25 until it stops.

[0068] S7. Parameter Acquisition: The dynamic braking torque of the brake under test is directly acquired through the speed and torque sensor 22; the braking distance ΔH of the brake under test is obtained by the following formula:

[0069]

[0070] In the formula, π represents the value of pi, D represents the nominal diameter of the cable winding mechanism of cable car 17, ω represents the initial rotational speed of cable car 17, ω is the set rotational speed, and Δt represents the braking time.

[0071] Before the brake under test is engaged, the efficiency η1 of the wire rope pulley system can be calculated based on the speed v of the cable sensor 24 and the initial rotational speed ω of the cable car 17.

[0072]

[0073] In the formula, π represents the value of pi, D represents the nominal diameter of the cable car's 17 winding mechanism, and n represents the ratio of the winding steel wire rope 9.

[0074] The pull-wire sensor 24 collects the descent acceleration and braking deceleration of the weight 25 in real time, and reflects the details of the braking process in real time, as well as the changes in braking torque, thereby reflecting the changes in the coefficient of friction in real time.

[0075] Noise sensor 20 collects the noise level of the brake under test during braking in real time;

[0076] Temperature sensor 21 collects the temperature change of the friction pads of the brake under test in real time during the braking process;

[0077] Test complete.

[0078] In S1, the cable car 17 is mounted on the mounting base 11. Several parallel slide rails 12 are mounted on the top of the mounting base 11. Each slide rail 12 is fitted with a slider 13. The slider 13 is mounted on the bottom of the cable car 17. A servo motor 14 is also mounted on the top of the mounting base 11. The output end of the servo motor 14 is connected to the cable car 17 through a lead screw 15. The servo motor 14 drives the cable car 17 to reciprocate linearly along the slide rail 12 through the lead screw 15, so that the entry angle and exit angle of the traction steel wire rope 10 on the cable car 17 are consistent with the working angle of the lifting mechanism.

[0079] The mounting base 11 and the column 1 are fitted with a first roller 6 and a second roller 7. A traction steel wire rope 10 is wound around the outer circumference of the first roller 6 and the second roller 7. The vertical section of the traction steel wire rope 10 passes through the first roller 6 and the second roller 7 and is on the same straight line as the rotation center of the movable pulley block 5.

[0080] Temperature sensor 21 is an infrared thermometer.

[0081] In S3, the appropriate braking pair is selected according to the model and specifications of the brake being tested; for drum brakes, the brake wheel is selected as the braking pair; for disc brakes, the brake disc is selected as the braking pair.

[0082] In S4, the tension F on the traction wire rope 10 is calculated according to (Equation 1):

[0083] (Equation 1)

[0084] In the formula, Me represents the rated torque of the brake being tested, and D represents the nominal diameter of the cable car's 17-reel mechanism;

[0085] The required mass M of weight 25 is calculated using equation (2):

[0086] (Equation 2)

[0087] In the formula, F represents the tension on the traction wire rope 10, n represents the ratio of the winding wire rope 9, and g represents the acceleration due to gravity.

[0088] The multiplier n of the wound wire rope 9 is related to the number a of the number of turns a of the wound wire rope 9 around the movable pulley block 5, n=2a.

[0089] In S4, the error range of the required weight M of the weight 25 is ±10%, and the actual weight of the weight 25 can be obtained by the tension sensor 23.

[0090] This embodiment provides a method for testing the braking performance of a brake. The test site setup is convenient, and the various structures in the test system are easy to disassemble and assemble. By setting up the pulley assembly and weights 25, the brake under test can be subjected to the same working conditions as the emergency braking of the hoisting mechanism of a crane or elevator, and the dynamic braking torque M of the brake under test can be obtained. e Parameters such as braking distance ΔH, braking process noise, friction plate temperature rise, and winding efficiency η1.

[0091] Example 2:

[0092] This embodiment uses a brake performance testing method provided in Embodiment 1 to test a safety brake;

[0093] The test steps include the following:

[0094] S1. Test site setup: The test system is used to test the brake under test. The test system includes two columns 1 fixed on the ground. The tops of the two columns 1 are connected by a crossbeam 2. Fixed pulleys 3 and fixed pulley groups 4 are installed on the crossbeam 2. The fixed pulley groups 4 are connected to a movable pulley group 5 by a wound steel wire rope 9. The movable end of the wound steel wire rope 9 is connected to a weight 25. The fixed end of the wound steel wire rope 9 is fixed to the crossbeam 2. The movable pulley group 5 is connected to a cable car 17 by a traction steel wire rope 10. A main shaft 18 is set in the middle of the cable car 17. One end of the main shaft 18 is connected to the output end of the drive motor 16 through a clutch 19. The other end of the main shaft 18 extends to the outside of the cable car 17.

[0095] S1.1. The cable car 17 is mounted on the mounting base 11. Several parallel slide rails 12 are mounted on the top of the mounting base 11. Each slide rail 12 is fitted with a slider 13. The slider 13 is mounted on the bottom of the cable car 17. A servo motor 14 is also mounted on the top of the mounting base 11. The output end of the servo motor 14 is connected to the cable car 17 through a lead screw 15. The servo motor 14 drives the cable car 17 to reciprocate linearly along the slide rail 12 through the lead screw 15.

[0096] S1.2. The mounting base 11 and the column 1 are fitted with a first roller 6 and a second roller 7. A traction steel wire rope 10 is wound around the outer circumference of the first roller 6 and the second roller 7. The vertical section of the traction steel wire rope 10 passes through the first roller 6 and the second roller 7 and is on the same straight line as the rotation center of the movable pulley group 5.

[0097] S1.3. The servo motor 14 drives the cable car 17 to move along the slide rail 12 to a suitable position through the lead screw 15, so that the entry angle and exit angle of the traction wire rope 10 on the cable car 17 are consistent with the working angle of the hoisting mechanism.

[0098] S1.4. In this embodiment, the winding wire rope 9 sequentially passes around the fixed pulley 3, the first pulley in the movable pulley group 5, the first pulley in the fixed pulley group 4, the second pulley in the movable pulley group 5, the second pulley in the fixed pulley group 4, and the third pulley in the movable pulley group 5, and is finally fixedly connected to the crossbeam 2. At this time, the number of turns a of the winding wire rope 9 around the movable pulley group 5 is three turns.

[0099] S2. Sensor arrangement: The sensors used in the test include noise sensor 20, temperature sensor 21, speed and torque sensor 22, tension sensor 23 and pull wire sensor 24.

[0100] The noise sensor 20 is positioned 1m above the ground and 1m away from the friction pad outlet of the brake being tested.

[0101] The detection head of temperature sensor 21 is aligned with the friction pad outlet of the brake being tested;

[0102] The speed and torque sensor 22 is located at the end of the spindle 18;

[0103] The tension sensor 23 is located at the connection point between the wound steel wire rope 9 and the crossbeam 2;

[0104] The body of the pull-wire sensor 24 is arranged on the crossbeam 2, and the pull head of the pull-wire sensor 24 is fixed to the top of the weight 25.

[0105] S2.1. Temperature sensor 21 is an infrared thermometer;

[0106] S3. Brake installation: Install the brake assembly of the brake under test onto the head of the spindle 18 using threaded fasteners;

[0107] S3.1. Select the appropriate braking couple according to the model and specifications of the brake being tested;

[0108] S3.2. For drum brakes, select the brake wheel as the braking element;

[0109] S3.3. For disc brakes, select the brake disc as the braking element;

[0110] S4. Counterweight, based on the rated torque M of the brake being tested. e Calculate the required mass M of weight 25;

[0111] S4.1. Calculate the tension F on the traction wire rope 10 according to (Equation 1):

[0112] (Equation 1)

[0113] In the formula, M e The rated torque of the brake under test is indicated by D, and the nominal diameter of the cable car's 17-reel mechanism is indicated by D.

[0114] S4.2. The required mass M of weight 25 is calculated from (Equation 2):

[0115] (Equation 2)

[0116] In the formula, F represents the tension on the traction wire rope 10, n represents the ratio of the winding wire rope 9, and g represents the acceleration due to gravity.

[0117] S4.3. The multiplier n of the winding wire rope 9 is related to the number of turns a of the winding wire rope 9 around the movable pulley block 5. n=2a. In this embodiment, the number of turns a of the winding wire rope 9 around the movable pulley block 5 is three turns, so the multiplier n of the winding wire rope 9 is 6.

[0118] S4.4. The error range of the required weight M of the weight 25 is ±10%. Since the torque of the brake being tested is directly measured by the speed torque sensor 22, the weight of the weight 25 and the moment of inertia of the cable car 17 are not included in the calculation. Therefore, the weight of the weight 25 does not need to be absolutely accurate.

[0119] S4.5. The actual weight of the weight 25 can be obtained by the tension sensor 23;

[0120] S5. The weight is lifted, which engages the clutch 19 and starts the drive motor 16. The drive motor 16 drives the cable car 17 through the main shaft 18 to retrieve the traction steel wire rope 10. The traction steel wire rope 10 pulls down the pulley block 5. The movable pulley block 5 causes the weight 25 to rise vertically by winding the steel wire rope 9.

[0121] S6. Braking test: The position signal of the weight 25 is obtained by the pull wire sensor 24. When the weight 25 rises to the set position, the drive motor 16 stops, the clutch 19 disengages, the test brake opens, and the weight 25 falls under the action of gravity. It rises vertically by winding the steel wire rope 9 and the movable pulley group 5 rises vertically by winding the steel wire rope 9. During the rise, the movable pulley group 5 drives the cable car 17 to rotate in the direction of releasing the traction steel wire rope 10 through the traction steel wire rope 10. The main shaft 18 rotates with the cable car 17 and moves at the same speed as the cable car 17. The speed of the main shaft 18 is obtained in real time by the speed and torque sensor 22. When the speed of the main shaft 18 reaches the set speed, the test brake is engaged to decelerate the descent of the weight 25 until it stops.

[0122] S7. Parameter acquisition: The dynamic braking torque of the brake under test is directly acquired through the speed and torque sensor 22.

[0123] The braking distance ΔH of the tested brake is obtained by the following formula:

[0124]

[0125] In the formula, π represents the value of pi, D represents the nominal diameter of the cable winding mechanism of cable car 17, ω represents the initial rotational speed of cable car 17, ω is the set rotational speed, and Δt represents the braking time.

[0126] Before the brake under test is engaged, the efficiency η1 of the wire rope pulley system can be calculated based on the speed v of the cable sensor 24 and the initial rotational speed ω of the cable car 17.

[0127]

[0128] In the formula, π represents the value of pi, D represents the nominal diameter of the cable winding mechanism of cable car 17, and n represents the multiplier of the winding steel wire rope 9. In this embodiment, n=6.

[0129] The pull-wire sensor 24 collects the descent acceleration and braking deceleration of the weight 25 in real time, and reflects the details of the braking process in real time, as well as the changes in braking torque, thereby reflecting the changes in the coefficient of friction in real time.

[0130] Noise sensor 20 collects the noise level of the brake under test during braking in real time;

[0131] Temperature sensor 21 collects the temperature change of the friction pads of the brake under test in real time during the braking process;

[0132] The above parameters can serve as source data for in-depth research on brakes;

[0133] Test complete.

[0134] This embodiment provides a specific winding process between the winding steel wire rope 9 and the pulley assembly, and calculates the winding ratio of the steel wire rope 9 as n=6. Then, according to (Equation 2), the tension F of the traction steel wire rope 10 in this embodiment is six times the weight of the weight 25. The design is ingenious, and high test requirements can be achieved with the help of a small weight 25, which effectively improves the test efficiency.

[0135] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A method of testing the braking performance of a brake, characterized by: Comprise the following steps: S1. Test site arrangement, the test system is tested to the measured brake, the test system comprises two upright columns (1) fixed on the ground, the top of two upright columns (1) is connected through crossbeam (2), the crossbeam (2) is installed with fixed pulley (3) and fixed pulley group (4), the lower portion of the fixed pulley group (4) is connected with movable pulley group (5) through winding wire rope (9), the movable end of winding wire rope (9) is connected with weight (25), the fixed end of winding wire rope (9) is fixed on crossbeam (2), movable pulley group (5) is connected with cable car (17) through traction wire rope (10), the middle portion of cable car (17) is provided with main shaft (18), one end of the main shaft (18) is connected with the output end of driving motor (16) through clutch (19), the other end of main shaft (18) extends to the outside of cable car (17); S2. Sensor arrangement, the sensor used in the test process includes noise sensor (20), temperature sensor (21), rotating speed and torque sensor (22), tension sensor (23) and guy sensor (24); Noise sensor (20) is arranged at the position 1m away from the ground height and 1m away from the friction plate outlet of the measured brake; The detection head of temperature sensor (21) is aligned with the friction plate outlet of the measured brake; Rotating speed and torque sensor (22) is arranged at the end of main shaft (18); Tension sensor (23) is arranged at the connecting position of winding wire rope (9) and crossbeam (2); The body of guy sensor (24) is arranged on crossbeam (2), and the pull head of guy sensor (24) is fixed on the top of weight (25); S3. Brake installation, the brake pair of the measured brake is installed to the shaft head of main shaft (18) through threaded fastener; S4. A counterweight, according to the rated braking torque M of the brake under test e The required mass M of the counterweight (25) is calculated. S5. Weight lifting, make clutch (19) combine, start driving motor (16), driving motor (16) drives cable car (17) to recover traction wire rope (10) through main shaft (18), traction wire rope (10) pulls down movable pulley group (5), movable pulley group (5) makes weight (25) rise along the vertical direction through winding wire rope (9); S6. Brake test, the position signal of weight (25) is obtained through guy sensor (24), when weight (25) rises to the set position, driving motor (16) stops, at the same time, clutch (19) is separated, the measured brake is opened, weight (25) falls under the action of gravity, and movable pulley group (5) rises along the vertical direction through winding wire rope (9), movable pulley group (5) drives cable car (17) to rotate towards the direction of releasing traction wire rope (10) in the rising process, main shaft (18) rotates with cable car (17) and at the same speed, the rotating speed of main shaft (18) is obtained in real time through rotating speed and torque sensor (22), when the rotating speed of main shaft (18) reaches the set rotating speed, the measured brake is applied, and the descending motion of weight (25) is decelerated until stopping; S7. Parameter acquisition, the dynamic braking torque of the measured brake is directly acquired through rotating speed and torque sensor (22). The braking distance ΔH of the measured brake is obtained by the following formula: In the formula, π represents the circular constant, D represents the nominal diameter of the cable winding mechanism of the cable car (17), ω represents the initial rotating speed of the cable car (17), and Δt represents the braking time; Before the measured brake is braked, the efficiency η1 of the steel wire rope pulley block can be calculated according to the speed v of the pull wire sensor (24) and the initial rotating speed ω of the cable car (17): In the formula, π represents the circular constant, D represents the nominal diameter of the cable winding mechanism of the cable car (17), and n represents the winding ratio of the steel wire rope (9); The pull wire sensor (24) collects the falling acceleration and braking deceleration of the weight (25) in real time, and reflects the details of the braking process and the change of the braking torque in real time, so as to reflect the change of the friction coefficient in real time. The noise sensor (20) collects the noise size of the measured brake in real time. The temperature sensor (21) collects the temperature change of the measured brake during the braking process in real time.

2. The brake performance test method of claim 1, wherein: In S1, the cable car (17) is installed on the mounting seat (11), a plurality of parallel sliding rails (12) are installed on the top of the mounting seat (11), a sliding block (13) is installed on each sliding rail (12), the sliding block (13) is installed on the bottom of the cable car (17), a servo motor (14) is installed on the top of the mounting seat (11), the output end of the servo motor (14) is connected with the cable car (17) through a lead screw (15), and the servo motor (14) drives the cable car (17) to make reciprocating linear motion along the sliding rail (12) through the lead screw (15), so that the in rope angle and the out rope angle of the traction steel wire rope (10) on the cable car (17) are consistent with the working angle of the lifting mechanism.

3. The brake performance test method of claim 2, wherein: The first roller (6) and the second roller (7) are installed between the mounting seat (11) and the stand column (1), the outer circumferential surface of the first roller (6) and the second roller (7) is wound with the traction steel wire rope (10), and the vertical section of the traction steel wire rope (10) is on the same straight line with the rotation center of the movable pulley block (5) through the first roller (6) and the second roller (7).

4. The brake performance test method of claim 1, wherein: The temperature sensor (21) adopts an infrared temperature measuring instrument.

5. The brake performance test method of claim 1, wherein: In S3, the corresponding brake pair is selected according to the type and specification of the measured brake; For the drum brake, the brake wheel is selected as the brake pair; For the disc brake, the brake disc is selected as the brake pair.

6. The brake performance test method of claim 1, wherein: In S4, the tension F of the traction steel wire rope (10) is calculated according to (formula 1): (Formula 1) wherein M e represents the rated braking torque of the brake under test, D represents the nominal diameter of the cable winding mechanism of the cable car (17); The required mass M of the weight (25) is calculated by (formula 2): (Formula 2) In the formula, F represents the tension of the traction steel wire rope (10), n represents the winding ratio of the steel wire rope (9), and g represents the acceleration of gravity.

7. The brake performance test method of claim 6, wherein: The winding ratio n of the steel wire rope (9) is related to the number of turns a of the steel wire rope (9) around the movable pulley block (5), and n=2a.

8. The brake performance test method of claim 1, wherein: In S4, the error range of the required weight M of the weight (25) is ±10%, and the actual weight of the weight (25) can be obtained through the tension sensor (23).

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