Performance test platform for hydraulic safety braking system of mine hoist

Abstract

The utility model discloses a hydraulic safety braking performance test platform for a mine hoist, which comprises a base, a permanent magnet synchronous motor arranged on the base and connected with a speed reducer through a coupler, the speed reducer connected with a torque and rotating speed sensor through a coupler, and the torque and rotating speed sensor connected with a brake shaft through a coupler. The brake shaft is arranged on the base through a bearing assembly, the brake shaft is fixedly sleeved with a detachable tile-shaped counterweight assembly and a brake disc, the brake disc is provided with a damper brake set, and the detachable tile-shaped counterweight assembly comprises a roller arranged on the brake shaft in a sleeving mode and a plurality of tile-shaped balancing weight sets detachably arranged in the circumferential direction of the roller; the damper brake group is movably arranged on the base and can simulate different hydraulic damper brake groups by moving relative to the brake disc, and the test platform is simple in overall structure and can simulate various working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to a mine hoist hydraulic safety brake system performance test platform, which is used for testing the performance of the hydraulic safety brake system. Background Art

[0002] Mine hoists, as indispensable equipment in the coal industry, shoulder the critical responsibility of transporting materials and personnel above and below ground, representing the "throat" of coal production. The braking system, a crucial component of mine hoists, is the cornerstone for ensuring their safe, stable, and efficient operation. Safety braking, a specific braking state for a hoist, specifically ensures that the braking system can quickly respond and effectively apply braking when an abnormal situation occurs. It is the last line of defense and the most critical safeguard in a mine hoist's safety system. Its performance is directly related to the safety and stability of mine production and is of paramount importance.

[0003] With the development of my country's coal industry, higher requirements are placed on the performance of hydraulic safety brake systems. To ensure the reliability of hydraulic safety brake systems, it is necessary to conduct tests to verify their performance and braking effect.

[0004] For example, publication number CN110470500B discloses a mine hoist safety braking performance test bench, which includes a control and power unit, a detection and display unit, and a braking performance test bench unit;

[0005] The control and power unit includes a computer, a servo drive, a servo motor, a detachable flywheel assembly, a fixed flywheel assembly, bolts, a flywheel shaft, a flywheel shaft bearing seat and a motor bracket. The servo drive and the servo motor are fixed on the motor bracket. The computer is connected to the servo drive, the servo drive is connected to the servo motor through a cable, and the servo motor shaft end is connected to the left end of the flywheel shaft through an A coupling. The detachable flywheel assembly includes at least one detachable flywheel, and the detachable flywheel consists of two semicircular rings, which are aligned on the circumference of a circle with a radius of R. Three through holes A are distributed, and the angles between adjacent through holes A are all 60 degrees. The detachable flywheel is connected to the through holes A by bolts to form a detachable flywheel assembly. The fixed flywheel assembly includes at least one fixed flywheel. The fixed flywheel has six through holes B evenly distributed on a circumference with a radius R. The through holes B have the same aperture as the through holes A. The fixed flywheel is connected to the through holes B by bolts to form a fixed flywheel assembly. The fixed flywheel assembly is fixedly mounted on the flywheel shaft, and the flywheel shaft is supported by a flywheel shaft bearing seat. The detachable flywheel assembly is connected to the fixed flywheel assembly by bolts.

[0006] The detection and display unit includes a torque and speed sensor, a torque and speed sensor bracket, and a data acquisition and controller. The torque and speed sensor is connected to the right end of the flywheel shaft through a B coupling. The torque and speed sensor is fixed to the torque and speed sensor bracket. The data acquisition and controller are respectively connected to the torque and speed sensor and the computer.

[0007] The braking performance test bench unit includes a brake shaft, a brake disc, a disc brake group, a brake shaft bearing seat, a pressure sensor and a hydraulic safety brake performance test bench system. The left end of the brake shaft is connected to the right shaft end of the torque and speed sensor through a C coupling. The brake disc is fixedly installed on the brake shaft, and the brake shaft is supported by the brake shaft bearing seat. The disc brake group is installed on the brake disc and is connected to the hydraulic safety brake performance test bench system through a hydraulic pipeline. The hydraulic safety brake performance test bench system is connected to a data acquisition and controller, and the pressure sensor is respectively connected to the disc brake group and the data acquisition and controller;

[0008] The motor bracket, flywheel shaft bearing seat, torque and speed sensor bracket, disc brake bracket and brake shaft bearing seat are all fixed on the base;

[0009] The control and power unit uses the electromagnetic torque Mmotor of the servo motor to simulate the static torque of the load, and uses the sum of the moments of inertia of the fixed flywheel group and the detachable flywheel group, Jtotal, to simulate the moment of inertia of the hoist system. The electromagnetic torque of the servo motor, Mmotor, = M + Jtotal·α, where M is the braking torque generated by the brake group on the brake disc, and α is the angular acceleration of the brake disc. The braking performance test bench unit uses the rotation speed of the brake disc to simulate the rotation speed of the hoist drum. By fixing the direction of the electromagnetic torque of the motor, the brake disc rotation speed is opposite to the direction of the electromagnetic torque of the motor to simulate the hoist lifting condition, and the brake disc rotation speed is in the same direction as the electromagnetic torque of the motor to simulate the hoist lowering condition.

[0010] The moment of inertia of the detachable flywheel group simulates the moment of inertia of the hoist load, which is used to simulate various load conditions. When the number of detachable flywheel groups is zero, the hoist is simulated in an unloaded state. The moment of inertia of the fixed flywheel group simulates the moment of inertia of the hoist system excluding the load, which is used to simulate various types of mine hoists.

[0011] The computer controls the servo driver to enable the servo motor to have two operating modes: speed control operating mode and torque control operating mode. The servo motor first controls the speed of the brake disc. When the brake disc rotation reaches the set value v, the hydraulic safety brake performance test bench system starts to work, and the brake group generates a braking torque to perform the safety brake performance test bench. At the same time, the servo motor switches to torque control to simulate the static torque of the load until the brake disc speed is constantly decelerated to zero.

[0012] The pressure sensor and torque speed sensor respectively detect the brake pressure signal of the brake group, the speed signal of the brake disc and the braking torque signal of the brake group, and input them into the data acquisition and controller, which are transmitted to the computer through the data acquisition and controller. After processing by the controller, a control instruction is issued to further control the brake pressure and brake disc speed of the brake group, thereby realizing the test of the dynamic and static characteristics of the brake pressure, the relationship between the brake pressure and the braking torque, and the relationship between the drum speed and the brake pressure when testing the safety braking performance test bench.

[0013] The above-mentioned existing test bench has many parts and components and has a complex structure. In addition, the simulation of various load conditions by changing the number of detachable flywheel groups has problems of low accuracy and narrow simulated load range. In addition, the position of the brake group is fixed, and only the braking performance of one type of hydraulic brake system can be tested. When it is necessary to test other types of hydraulic brake systems, the detachable flywheel group can only be replaced, which has the problem of low applicability. Utility Model Content

[0014] In view of the above-mentioned technical problems existing in the existing test benches, the purpose of the present utility model is to provide a mine hoist hydraulic safety brake system performance test platform, which has a simple overall structure and adopts a detachable tile-shaped counterweight assembly and a movable brake group to simulate the actual braking process of different models of hoists at different speeds and different loads.

[0015] In order to achieve the above-mentioned purpose, the utility model provides a mine hoist hydraulic safety brake system performance test platform, including a base, a permanent magnet synchronous motor is provided on the base, the permanent magnet synchronous motor is connected to the reducer through a coupling, the reducer is arranged on the base and connected to the torque and speed sensor through a coupling, the torque and speed sensor is arranged on the base and connected to the brake shaft through a coupling, the brake shaft is arranged on the base through a bearing assembly, a detachable tile-shaped counterweight assembly and a brake disc are fixedly sleeved on the brake shaft, a brake brake group is installed on the brake disc, the brake brake group is connected to the hydraulic safety brake system and the pressure sensor through hydraulic pipelines, the hydraulic safety brake system is connected to a data acquisition and controller, the data acquisition and controller are electrically connected to the pressure sensor, the torque and speed sensor, and a computer, and the computer is connected to the permanent magnet synchronous motor;

[0016] The detachable tile-shaped counterweight assembly includes a drum sleeved on the brake shaft and a plurality of tile-shaped counterweight blocks detachably arranged around the drum.

[0017] The brake group is movably arranged on a base, and the brake group can simulate different hydraulic brake groups by moving relative to the brake disc.

[0018] Furthermore, the tile-shaped counterweight block group includes a first counterweight block and a second counterweight block, the first counterweight block and the second counterweight block are both tile-shaped, the first counterweight block is symmetrically provided with two first connecting holes, the second counterweight block is symmetrically provided with two second connecting holes, and the hole spacing between the two first connecting holes is smaller than the hole spacing between the two second connecting holes;

[0019] The drum surface is provided with a plurality of two first mounting holes and a plurality of two second mounting holes corresponding to the two first connecting holes and the two second connecting holes. The plurality of first mounting holes and the plurality of second mounting holes are alternately distributed on the drum surface in sequence, so as to be respectively connected to the first counterweight block and the second counterweight block;

[0020] The first counterweight is threadedly connected to the two first mounting holes on the drum surface via a fastener passing through the first connecting hole, and the second counterweight is threadedly connected to the two second mounting holes on the drum surface via a fastener passing through the second connecting hole.

[0021] Furthermore, the first counterweight block is divided into a first counterweight block thick plate and a first counterweight block thin plate based on thickness, and the second counterweight block is divided into a second counterweight block thick plate and a second counterweight block thin plate based on thickness. The several tile-shaped counterweight block groups on the surface of the drum can adopt a combination of the first counterweight block thick plate and the second counterweight block thick plate to form a full-thick method, a combination of the first counterweight block thin plate and the second counterweight block thin plate to form a full-thin method, a combination of the first counterweight block thick plate and the second counterweight block thin plate or the first counterweight block thin plate and the second counterweight block thick plate to form an alternating thick and thin method, a combination form in which the first counterweight block and the second counterweight block are not assembled, and a combination form in which the first counterweight block is selected to be not assembled and the second counterweight block adopts the second counterweight block thick plate or the second counterweight block thin plate, so as to simulate various loads.

[0022] Furthermore, the middle parts of the first counterweight blocks and the second counterweight blocks in the several tile-shaped counterweight block groups are provided with fixing grooves, and the fixing grooves of the several first counterweight blocks and the second counterweight blocks cooperate to form an annular mounting groove, and the several tile-shaped counterweight block groups are pressed by putting the fixing ring in the annular mounting groove.

[0023] Furthermore, the brake group is installed on the base through the brake group bracket, the brake disc is located in the middle of the brake group, the brake group bracket is provided with a guide rail, and the brake group is provided with a guide groove corresponding to the guide rail. The brake group can change the braking radius by moving in coordination with the guide groove and the guide rail. After movement, the brake group and the brake group bracket are relatively fixed by fasteners to simulate the hydraulic brake group under various working conditions.

[0024] The utility model provides a mine hoist hydraulic safety brake system performance test platform with a simple overall structure and adopts a detachable tile-shaped counterweight component and a movable brake group to simulate the actual braking process of different types of hoists at different speeds and different loads.

[0025] Compared with the existing technology, the mine hoist hydraulic safety brake system performance test platform provided by the utility model has the following beneficial effects:

[0026] (1) This solution uses a permanent magnet synchronous motor. Servo motors can only be used in low-power control applications and are relatively expensive compared to permanent magnet synchronous motors. For high-power drive applications, only permanent magnet synchronous motors can be used. To ensure speed accuracy, a closed-loop speed control system is constructed with a torque and speed sensor and a data acquisition and control system.

[0027] (2) In the prior art, a detachable flywheel assembly and a fixed flywheel assembly are connected by bolts to form a simulated load. Since the detachable flywheel has a small mass, it can only be used for braking under small load conditions and cannot simulate the load required for emergency braking under large load conditions. This solution uses a roller and a tile-shaped counterweight block assembly to form a wider range of load types and a larger range of simulated loads than the detachable flywheel assembly.

[0028] (3) The brake group in the prior art cannot move on the brake disc. In this solution, the brake group can move relative to the brake disc to adjust the radius of the braking torque. The combination of the adjustment roller and the tile-shaped counterweight block group can be used to test hydraulic brake systems of various pressure levels, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 This is a schematic diagram of the overall connection of the three-dimensional top view structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0031] Figure 2 This is a schematic diagram of the overall connection three-dimensional structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0032] Figure 3 This is a structural diagram of the first counterweight thick plate in the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0033] Figure 4 This is a structural diagram of the second counterweight thick plate of the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0034] Figure 5This is a structural diagram of the first counterweight plate of the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0035] Figure 6 This is a structural diagram of the second counterweight plate of the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0036] Figure 7 This is a structural diagram of the brake group in the mine hoist hydraulic safety brake system performance test platform provided by the utility model;

[0037] Figure 8 This is a schematic diagram of the structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model when the drum is unloaded;

[0038] Figure 9 This is a schematic diagram of the structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model, in which the drum is loaded by a combination of thin counterweight blocks;

[0039] Figure 10 This is a schematic diagram of the structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model, in which the drum is loaded by a combination of thick counterweight blocks;

[0040] Figure 11 This is a schematic diagram of the structure of the mine hoist hydraulic safety brake system performance test platform provided by the utility model, in which the drum is loaded with thick counterweight blocks at intervals;

[0041] Figure 12 This is a structural schematic diagram of the mine hoist hydraulic safety brake system performance test platform provided by the utility model, in which the drum is loaded by a combination of thick and thin stacked alternating counterweights.

[0042] Illustration:

[0043] Coupling 10, reducer 20, bearing assembly 30, motor bracket 40, sensor bracket 50, brake assembly bracket 60;

[0044] Base 100, permanent magnet synchronous motor 200, torque and speed sensor 300, brake shaft 400, detachable tile-shaped counterweight assembly 500, brake disc 600, brake assembly 700, hydraulic safety brake system 800, pressure sensor 900, data acquisition and controller 1000, computer 1100;

[0045] Guide rail 61, fastener 62, roller 510, first mounting hole 511, second mounting hole 512, tile-shaped counterweight block group 520, first connecting hole 521, second connecting hole 522, first counterweight block thick plate 521a, first counterweight block thin plate 521b, second counterweight block thick plate 522a, second counterweight block thin plate 522b, fixing groove 523, fixing ring 524. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0047] See also Figure 1 , Figure 2 , which is a structural schematic diagram of the mine hoist hydraulic safety brake system performance test platform provided by the utility model.

[0048] According to the diagram, the mine hoist hydraulic safety brake system performance test platform provided by the utility model includes eleven components: a base 100, a permanent magnet synchronous motor 200, a torque and speed sensor 300, a brake shaft 400, a detachable tile-shaped counterweight assembly 500, a brake disc 600, a brake group 700, a hydraulic safety brake system 800, a pressure sensor 900, a data acquisition and controller 1000, and a computer 1100.

[0049] A permanent magnet synchronous motor 200 is provided on the base 100 , and the permanent magnet synchronous motor 200 is a driving source of the test platform, which is used to simulate the static torque of the hoist load.

[0050] The permanent magnet synchronous motor 200 is connected to the reducer 20 via the coupling 10. The reducer 20 is arranged on the base 100 and is connected to the torque and speed sensor 300 via the coupling 10.

[0051] The torque and speed sensor 300 is disposed on the base and connected to the brake shaft 400 via the coupling 10 . The brake shaft 400 is disposed on the base 100 via the bearing assembly 30 .

[0052] A detachable tile-shaped counterweight assembly 500 and a brake disc 600 are fixedly mounted on the brake shaft 400, and a brake assembly 700 is mounted on the brake disc 600;

[0053] The brake group 700 is connected to the hydraulic safety brake system 800 and the pressure sensor 900 through hydraulic pipelines. The hydraulic safety brake system 800 is connected to the data acquisition and controller 1000. The data acquisition and controller 1000 is electrically connected to the pressure sensor 900, the torque and speed sensor 300, and the computer 1100. The computer 1100 is connected to the permanent magnet synchronous motor 200.

[0054] The detachable tile-shaped counterweight assembly 500 includes a roller 510 sleeved on the brake shaft 400 and a plurality of tile-shaped counterweight blocks 520 detachably arranged around the roller 510.

[0055] The brake assembly 700 is movably disposed on the base 100 , and the brake assembly 700 can simulate different hydraulic brake assemblies by moving relative to the brake disc 600 .

[0056] The above-mentioned multiple couplings 10 are mechanical components used to firmly connect different shafts to rotate together and transmit motion and torque. The reducer is used to reduce the rotation speed and increase the torque.

[0057] In this solution, the permanent magnet synchronous motor 200 is preferably disposed on the base 100 using a motor bracket 40 , and the torque and speed sensor 300 is preferably disposed on the base 100 using a sensor bracket 50 .

[0058] Compared to existing technologies that use servo motors, this solution uses permanent magnet synchronous motors. Servo motors can only be used in low-power control applications and are relatively expensive compared to permanent magnet synchronous motors. For high-power drive applications, only permanent magnet synchronous motors can be used. To ensure speed accuracy, closed-loop speed control is established with torque and speed sensors and data acquisition and control systems.

[0059] In the prior art, a detachable flywheel group and a fixed flywheel group are connected by bolts to form a simulated load. Since the detachable flywheel has a small mass, it can only be used for braking under small load conditions and cannot simulate the load required for emergency braking under large load conditions. Compared with this solution, the roller 510 and the tile-shaped counterweight block group 520 have more load types, and the simulated load range is larger than that of the detachable flywheel group.

[0060] The brake group in the prior art cannot move on the brake disc. In this solution, the brake group 700 can move relative to the brake disc 600 to adjust the braking torque radius. It is combined with the adjustment roller 510 and the tile-shaped counterweight block group 520 to form a form that can be used to test hydraulic brake systems of various pressure levels and has a wide range of applications.

[0061] Furthermore, the electromagnetic torque Mmotor of the permanent magnet synchronous motor 200 simulates the static torque of the load, and the sum of the moments of inertia of the drum 510 and the tile-shaped counterweight block group 520, Jtotal, simulates the moment of inertia of the hoist system. The electromagnetic torque of the permanent magnet synchronous motor 200, Mmotor = M + Jtotal·α, where M is the braking torque generated by the brake assembly 700 on the brake disc 600, and α is the angular acceleration of the brake disc 600. The rotation speed of the brake disc 600 is used to simulate the rotation speed of the hoist drum. The rotation direction of the motor is controlled by changing the phase sequence of the permanent magnet synchronous motor 200. When the rotation speed of the brake disc 600 is opposite to the direction of the electromagnetic torque of the motor, the hoist lifting condition is simulated. When the rotation speed of the brake disc 600 is in the same direction as the electromagnetic torque of the motor, the hoist lowering condition is simulated.

[0062] The moment of inertia of the tile-shaped counterweight assembly 520 simulates the moment of inertia of the hoist load, and is used to simulate various load conditions. When the tile-shaped counterweight assembly 520 is not installed, the hoist is simulated in an unloaded state. The moment of inertia of the drum 510 simulates the moment of inertia of the hoist system excluding the load, and is used to simulate various types of mine hoists.

[0063] The computer 1100 controls the permanent magnet synchronous motor 200 to have two operating modes: a motor operating mode and an electromagnetic brake operating mode. The permanent magnet synchronous motor 200 outputs a speed to the brake disc 600 through the reducer 20. When the speed of the brake disc 600 reaches the set value v, the hydraulic safety brake system 800 starts to operate, and the brake assembly 700 generates a braking torque for safety braking. At the same time, the permanent magnet synchronous motor 200 switches to electromagnetic braking to simulate the static torque of the load until the speed of the brake disc 600 is constantly reduced to zero.

[0064] The pressure sensor 900 and the torque and speed sensor 300 are responsible for monitoring the brake pressure signal of the brake assembly 700, the speed signal of the brake disc 600, and the braking torque signal of the brake assembly 700, respectively, and transmitting this data to the data acquisition and controller 1000. The data acquisition and controller 1000 then transmits this information in real time to the computer 1100. After precise analysis and processing by the controller, it issues corresponding control instructions. These instructions are designed to precisely control the brake pressure of the brake assembly 700 and the speed of the brake disc 600, thereby enabling comprehensive testing of the dynamic and static characteristics of the brake pressure during safe braking, the relationship between brake pressure and braking torque, and the relationship between drum speed and brake pressure.

[0065] Specifically, such as Figure 2 , a plurality of tile-shaped counterweight blocks 520 are sequentially and detachably arranged on the surface of the drum 510 in the circumferential direction. The present solution does not limit the number and distribution of the tile-shaped counterweight blocks 520 on the surface of the drum 510. The number and distribution of the tile-shaped counterweight blocks 520 assembled on the surface of the drum 510 can be selected according to needs;

[0066] The tile-shaped counterweight block group 520 includes a first counterweight block and a second counterweight block. The first counterweight block and the second counterweight block are both tile-shaped. The first counterweight block is symmetrically provided with two first connecting holes 521, and the second counterweight block is symmetrically provided with two second connecting holes 522. The hole spacing between the two first connecting holes 521 is smaller than the hole spacing between the two second connecting holes 522.

[0067] A plurality of first mounting holes 511 and a plurality of second mounting holes 512 are provided on the surface of the drum 510 corresponding to the two first connecting holes 521 and the two second connecting holes 522. The plurality of first mounting holes 511 and the plurality of second mounting holes 512 are alternately distributed on the surface of the drum 510 for connecting to the first counterweight and the second counterweight, respectively.

[0068] The first counterweight is threadedly connected to the two first mounting holes 511 on the surface of the drum 510 via fasteners passing through the first connecting hole 521 , and the second counterweight is connected to the two second mounting holes 512 on the surface of the drum 510 via fasteners passing through the second connecting hole 522 .

[0069] The above-mentioned installation holes with two hole spacings are installed alternately, and the staggered arrangement of the through holes can avoid stress concentration and further enhance the safety of the test bench;

[0070] Furthermore, if Figure 3-Figure 6 The first counterweight block is divided into a first counterweight block thick plate 521a and a first counterweight block thin plate 521b based on thickness, and the second counterweight block is divided into a second counterweight block thick plate 522a and a second counterweight block thin plate 522b based on thickness;

[0071] The several tile-shaped counterweight blocks 520 on the surface of the drum 510 can adopt a combination of a first counterweight block thick plate 521a and a second counterweight block thick plate 522a to form a full-thick mode, a combination of a first counterweight block thin plate 521b and a second counterweight block thin plate 522b to form a full-thin mode, a combination of the first counterweight block thick plate 521a and the second counterweight block thin plate 522b or the first counterweight block thin plate 521b and the second counterweight block thick plate 522a to form an alternating thick and thin mode, a combination form in which neither the first counterweight block nor the second counterweight block is assembled, a combination form in which the first counterweight block adopts the first counterweight block thick plate 521a or the first counterweight block thin plate 521b, and the second counterweight block is not assembled, and a combination form in which the first counterweight block is not assembled, and the second counterweight block adopts the second counterweight block thick plate 522a or the second counterweight block thin plate 522b.

[0072] This solution uses two types of thick and thin tile-shaped counterweights to form many load forms, which is relatively comprehensive. The above-mentioned thick and thin tile-shaped counterweight groups can be stacked together and alternately combined, such as full-thick counterweights, full-thin counterweights, no counterweights, thick and thin stacked alternating counterweights and other combinations. It can simulate a variety of loads and set a certain number of tile-shaped counterweight groups for combination according to actual needs.

[0073] As an example, Figure 8 In this solution, the tile-shaped counterweight block group 520 is not installed on the surface of the drum 510 to simulate the no-load state of the elevator;

[0074] like Figure 9 The first counterweight plate 521b and the second counterweight plate 522b are assembled on the drum 510 to simulate a light load condition.

[0075] like Figure 10 The first counterweight plate 521a and the second counterweight plate 522a are assembled on the drum 510 to simulate a heavy-load condition.

[0076] like Figure 11 The first counterweight block in the plurality of tile-shaped counterweight blocks 520 on the drum 510 uses the first counterweight block thick plate 521a, and the second counterweight block is not assembled or the second counterweight block uses the second counterweight block thick plate 522a. The first counterweight block is not assembled on the drum 510 to simulate different working conditions.

[0077] like Figure 12 In the plurality of tile-shaped counterweight blocks 520 on the drum 510, the first counterweight block adopts the first counterweight block thick plate 521a, and the second counterweight block adopts the second counterweight block thin plate 522b, or the first counterweight block adopts the first counterweight block thin plate 521b, and the second counterweight block adopts the second counterweight block thick plate 522a to be put on the drum 510 to simulate different working conditions.

[0078] This can simulate the actual braking process of different types of mine hoists at different speeds and loads.

[0079] Furthermore, to further improve the reliability of the installation of the plurality of tile-shaped counterweight blocks 520, a fixing groove 523 is provided in the middle of each of the first and second counterweight blocks in the plurality of tile-shaped counterweight blocks 520. The fixing grooves 523 of the plurality of first and second counterweight blocks cooperate to form an annular mounting groove. By sleeve-fitting a fixing ring 524 into the annular mounting groove, the plurality of tile-shaped counterweight blocks 520 are compressed.

[0080] The above-mentioned fixing ring is preferably composed of a steel cable and a heart-shaped ring. The steel cable is sleeved on the above-mentioned annular mounting groove and fastened by elastic extrusion force. The steel cable is reinforced by the heart-shaped ring to prevent the counterweight from being thrown out due to the high-speed rotation of the drum 510, thereby enhancing the safety of the test bench.

[0081] The brake group 700 can change the braking position on the brake disc 600, such as Figure 7 , in order to simulate various hydraulic brake groups;

[0082] like Figure 7 The brake assembly 700 is mounted on the base 100 via the brake assembly bracket 60. The brake disc 600 is located in the middle of the brake assembly 700. The brake assembly bracket 60 is provided with a guide rail 61. The brake assembly 700 is provided with a guide groove corresponding to the guide rail 61. The brake assembly 700 can change the braking radius by moving in conjunction with the guide groove and the guide rail 61. After movement, the brake assembly 700 is fixed relative to the brake assembly bracket 60 by the fastener 62.

[0083] The fastener 62 is preferably a bolt, which is threadably connected to the brake assembly 700 and passes through the brake assembly 700 to abut against the brake assembly bracket 60 to achieve relative fixation.

[0084] The brake assembly 700 can be fixed at any position of the center or edge of the brake disc 600 by moving, thereby forming different hydraulic brake assemblies according to different positions.

[0085] When the brake group 700 is located at the edge of the brake disc 600, it is used to simulate a small hydraulic brake group. The change in the position of the brake group 700 can be used to simulate various different hydraulic brake groups. By reducing the braking radius, the pressure range of the braking system is expanded. The specified braking radius is set according to actual needs, which can be used to simulate hydraulic brake groups under various working conditions.

[0086] The above shows and describes 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 above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A mine hoist hydraulic safety brake system performance test platform, characterized in that: The invention comprises a base, on which a permanent magnet synchronous motor is provided, the permanent magnet synchronous motor is connected to a reducer through a coupling, the reducer is provided on the base and connected to a torque and speed sensor through a coupling, the torque and speed sensor is provided on the base and connected to a brake shaft through a coupling, the brake shaft is provided on the base through a bearing assembly, a detachable tile-shaped counterweight assembly and a brake disc are fixedly sleeved on the brake shaft, a brake brake group is installed on the brake disc, the brake brake group is connected to a hydraulic safety brake system and a pressure sensor through hydraulic pipelines, the hydraulic safety brake system is connected to a data acquisition and controller, the data acquisition and controller are electrically connected to the pressure sensor, the torque and speed sensor, and a computer, and the computer is connected to the permanent magnet synchronous motor; The detachable tile-shaped counterweight assembly includes a drum sleeved on the brake shaft and a plurality of tile-shaped counterweight blocks detachably arranged around the drum. The brake group is movably arranged on a base, and the brake group can simulate different hydraulic brake groups by moving relative to the brake disc.

2. The mine hoist hydraulic safety brake system performance test platform according to claim 1 is characterized in that: The tile-shaped counterweight block group includes a first counterweight block and a second counterweight block, wherein the first counterweight block and the second counterweight block are both tile-shaped, the first counterweight block is symmetrically provided with two first connecting holes, and the second counterweight block is symmetrically provided with two second connecting holes, and the hole spacing between the two first connecting holes is smaller than the hole spacing between the two second connecting holes; The drum surface is provided with a plurality of two first mounting holes and a plurality of two second mounting holes corresponding to the two first connecting holes and the two second connecting holes. The plurality of first mounting holes and the plurality of second mounting holes are alternately distributed on the drum surface in sequence, so as to be respectively connected to the first counterweight block and the second counterweight block; The first counterweight is threadedly connected to the two first mounting holes on the drum surface via a fastener passing through the first connecting hole, and the second counterweight is threadedly connected to the two second mounting holes on the drum surface via a fastener passing through the second connecting hole.

3. The mine hoist hydraulic safety brake system performance test platform according to claim 2 is characterized in that: The first counterweight block is divided into a first counterweight block thick plate and a first counterweight block thin plate based on thickness, and the second counterweight block is divided into a second counterweight block thick plate and a second counterweight block thin plate based on thickness. The several tile-shaped counterweight block groups on the surface of the drum can adopt a first counterweight block thick plate and a second counterweight block thick plate to form a full-thick method, a first counterweight block thin plate and a second counterweight block thin plate to form a full-thin method, a first counterweight block thick plate and a second counterweight block thin plate or a first counterweight block thin plate and a second counterweight block thick plate to form an alternating thick and thin method, a combination form in which the first counterweight block and the second counterweight block are not assembled, and a combination form in which the first counterweight block is selected to be not assembled and the second counterweight block adopts a second counterweight block thick plate or a second counterweight block thin plate to simulate various loads.

4. The mine hoist hydraulic safety brake system performance test platform according to claim 1 is characterized in that: The middle parts of the first and second counterweight blocks in the several tile-shaped counterweight block groups are provided with fixing grooves, and the fixing grooves of the several first and second counterweight blocks cooperate to form an annular mounting groove. By setting the fixing ring in the annular mounting groove, the several tile-shaped counterweight block groups are pressed tightly.

5. The mine hoist hydraulic safety brake system performance test platform according to claim 1 is characterized in that: The brake group is installed on the base through the brake group bracket, the brake disc is located in the middle of the brake group, the brake group bracket is provided with a guide rail, and the brake group is provided with a guide groove corresponding to the guide rail. The brake group can change the braking radius by moving in coordination with the guide groove and the guide rail. After movement, the brake group and the brake group bracket are relatively fixed by fasteners to simulate the hydraulic brake group under various working conditions.

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