CN113447254B - Brake monitoring device and method for closed-loop steel wire rope lifting system - Google Patents
Brake monitoring device and method for closed-loop steel wire rope lifting system Download PDFInfo
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Abstract
The invention discloses a brake monitoring device and a method of a closed-loop steel wire rope lifting system, which are suitable for the research of brake shoe material braking. The device comprises a tester base, a driving system, a transmission system, a wire rope pre-tightening device, an inertial flywheel and a measuring system for collecting various data, wherein the driving system, the transmission system, the wire rope pre-tightening device, the inertial flywheel and the measuring system are respectively arranged on the tester base; the multi-physical signal comprehensive measurement device adopting the torque sensor, the three-dimensional force sensor, the vibration sensor, the encoder and the thermal infrared imaging camera tests the braking behavior of the mine hoist, and realizes the braking monitoring of the mine hoist system by combining the steel wire rope bearing simulation. The novel portable electric power generation device is simple in structure, convenient to use and wide in practicability.
Description
Technical Field
The invention relates to a brake monitoring device and a method, in particular to a brake monitoring device and a method of a closed loop steel wire rope lifting system, which are particularly suitable for researching the brake performance of a brake shoe material and the tribological behavior between a steel wire rope and a liner in the variable braking process
Background
The mine lifting system is a throat part in the production process of the coal mine, the transportation of the coal mine or personnel is realized by means of a steel wire rope driving lifting container, the steel wire rope serving as a bearing component has great significance on the safety production of the coal mine and the life safety of the personnel, and the tribological behavior between the bearing component and a roller liner in the operation process (particularly in the braking process) is a research hot spot which is widely focused; in addition, the braking process of the mine hoisting system is mainly realized by friction between a brake shoe and a brake disc, and the mine hoisting system is inevitably required to develop towards a high-speed and heavy-load direction along with the development trend of large-scale modern coal mine production, so that the requirement on the braking performance of the brake shoe material is higher, and the reasonable evaluation of the braking performance of the brake shoe material is particularly important. The braking process of the mine hoisting system is mainly influenced by friction between a brake shoe and a brake disc and traction of a steel wire rope, the hoisting speed can reach more than 20m/s and the hoisting weight can reach more than 60t in the production process of a large-scale modern mine, meanwhile, the mine hoisting working condition is complex and changeable, and particularly under the emergency braking working condition, the reliability of main bearing components such as the brake shoe, the steel wire rope and a liner is an important guarantee for mine safety production. Therefore, the mine hoisting system braking monitoring device added with the steel wire rope bearing part is developed, the braking tests of the hoisting system under the conditions of different tensioning states, different initial braking speeds and different specific braking pressures of the steel wire rope are developed, the braking performance of the brake shoe material is evaluated, the tribological behavior of the steel wire rope-liner friction pair is analyzed, and the like, so that the component proportion optimization of the brake shoe material and the friction liner material and the dynamic behavior characterization of the steel wire rope are guided, and the mine hoisting system braking monitoring device has important significance for further improving the braking safety of the mine hoisting system.
At present, less research is conducted on full-working condition simulation of a braking process of a mine hoisting system, and similarly, patent number CN201910190291.8 discloses a braking simulation test device and method for a disc brake of a kilometer deep well hoist, which can test the braking performance of the disc brake of the mine hoist in emergency braking, but the device mainly evaluates the braking performance of a brake shoe material, does not add a steel wire rope bearing part for linkage, and has a certain deviation with the actual working condition in the simulated braking process; patent number CN201410152097.8 discloses a test device and a method for detecting dynamic micro-friction state of a steel wire rope-friction liner, which can study the dynamic tension evolution process of the steel wire rope, the dynamic friction process between the steel wire rope and the liner and the like, but the device does not consider the influence of a complex braking process, particularly an emergency braking process, on the dynamic friction process of the steel wire rope-liner.
The problems of the existing mine hoisting system brake monitoring device or method are mainly as follows: the braking performance of the brake shoe material and the friction process of the steel wire rope and the liner are jointly influenced when the mine hoisting system brakes, the cooperative effect of the brake shoe material and the friction process of the steel wire rope and the liner is not considered in the existing device and method, and the full simulation of the mine hoisting system braking process is not realized.
Disclosure of Invention
Technical problems: aiming at the defects of the prior art, the brake monitoring device and the method for the closed-loop steel wire rope lifting system can realize the brake monitoring of the mine lifting system combined with the steel wire rope bearing simulation, and can safely, reliably and quickly simulate the brake performance of a brake shoe material and the tribological behavior between the steel wire rope and a liner in the variable braking process.
The technical scheme is as follows: to achieve the above technical purpose, the invention comprises a tester base, a driving system, a transmission system, a wire rope pre-tightening, an inertial flywheel and a measuring system for collecting various data, wherein the driving system, the transmission system, the wire rope pre-tightening, the inertial flywheel and the measuring system are respectively arranged on the tester base
The driving system comprises a three-phase asynchronous motor, wherein the bottom of the three-phase asynchronous motor is arranged on a base of the testing machine through a motor base, the three-phase asynchronous motor is connected with a transmission main shaft through a hydraulic coupler, the three-phase asynchronous motor drives the transmission main shaft to rotate through the hydraulic coupler, and meanwhile, torque is transmitted through the change of the liquid torque of the hydraulic coupler, so that the effects of automatic transmission adaptability function, impact reduction and torsional vibration isolation function, overload protection and stepless speed regulation are realized, and the operation is stable;
The transmission system comprises a brake disc arranged on a transmission main shaft, a first bearing seat and a second bearing seat are respectively arranged at the front and the rear of the brake disc through bearings, wherein brake systems are arranged at the two sides of the brake disc, the brake systems comprise a first hydraulic brake clamp and a second hydraulic brake clamp which are respectively arranged through clamp connectors, a first brake shoe is arranged between the first hydraulic brake clamp and the brake disc, and a second brake shoe is arranged between the second hydraulic brake clamp and the brake disc;
the steel wire rope pre-tightening system comprises a transmission shaft, a transmission wheel is arranged on the transmission shaft and connected with a brake disc through a steel wire rope, a bearing assembled on a hydraulic sliding table, a bearing seat III and a bearing seat IV are respectively arranged on the transmission shaft at two sides of the transmission wheel, an inertial flywheel comprises a first inertial flywheel set arranged on the transmission shaft at the outer side of the bearing and the bearing seat III, a second inertial flywheel set arranged on the transmission shaft at the four sides of the bearing and the bearing seat, the first inertial flywheel set is fixed and convenient to detach through a flange connection disc I, the second inertial flywheel set is fixed and convenient to detach through a flange connection disc II, and a hydraulic cylinder is arranged on the hydraulic sliding table.
The first flywheel set and the second flywheel set are convenient to detach and replace through the first flange connection disc and the second flange connection disc, different flywheel sets are different in variety, and are combined and assembled according to different mine hoists which are simulated as required and working conditions under different loads, so that equivalent moment of inertia is obtained, corresponding dimensions are calculated according to used material densities, and the corresponding dimensions are specifically distributed and assembled, so that simulation under different load working conditions is realized.
The thickness of the brake disc is 60-80mm; the first hydraulic brake clamp and the second hydraulic brake clamp are connected to the base through screws, the contact surface area of the first brake shoe and the second brake shoe with the brake disc is 25mm multiplied by 25mm, the first hydraulic brake clamp and the second hydraulic brake clamp apply braking loading force through hydraulic oil by a hydraulic station to realize braking action after the three-phase asynchronous motor is closed, and the friction coefficient is 0.2-0.6.
The driving wheel is provided with a second steel wire rope gasket, and the brake disc is provided with a first steel wire rope gasket.
The measuring system comprises a first encoder arranged at the end part of the transmission main shaft, a shaft sleeve type torque sensor arranged at the position, close to the hydraulic coupler, of the transmission main shaft, a second encoder arranged at the end part of the transmission shaft, a three-dimensional force sensor arranged between a brake shoe and a first hydraulic brake clamp, a vibration sensor arranged on the first hydraulic brake clamp, a three-dimensional force sensor and a vibration sensor symmetrically arranged between the second brake shoe and the second hydraulic brake clamp, an S-shaped tension sensor (29) arranged between the hydraulic sliding table and a hydraulic sliding table base, and a thermal infrared imaging camera arranged at one side of the brake disc through a support, wherein the vibration sensor, the three-dimensional force sensor, the torque sensor, the S-shaped tension sensor, the first encoder and the second encoder are all connected with a computer through a data acquisition card.
A monitoring method of a brake monitoring device of a closed loop steel wire rope lifting system comprises the following steps:
firstly, driving a hydraulic cylinder through a hydraulic station, wherein a piston rod of the hydraulic cylinder pushes a hydraulic slipway to drive a driving wheel on the slipway to move, so that a steel wire rope with two ends connected with a brake disc and the driving wheel is tensioned, then maintaining pressure of the hydraulic station, keeping the slipway pushed by the piston rod from moving backwards, and further realizing tensioning and self-locking of the steel wire rope, wherein the tensioning force is acquired through an S-shaped tension sensor;
According to different loads of the simulated mine hoist, the first inertial flywheel set and the second inertial flywheel set with different types and weights are fixed through the first flange connecting disc and the second flange connecting disc, so that corresponding working conditions are realized; firstly, calculating equivalent inertia of an actual mine hoist to be simulated, and selecting a first inertia flywheel set and a second inertia flywheel set according to the combination of flywheels with different inertia sizes after uniform scaling, so as to realize the adjustment of the integral inertia of the tester;
Starting a three-phase asynchronous motor, outputting power to a driving transmission main shaft through a hydraulic coupler, driving the main shaft to drive a brake disc to rotate, driving a driving wheel to rotate through a steel wire rope, and realizing the simulation working condition operation of the mine hoist;
Then the simulation of the emergency braking of the mine hoist is started: firstly, turning off a power supply of a three-phase asynchronous motor, applying braking specific pressure in a range of 1.6-2.0MPa to a first hydraulic brake clamp and a second hydraulic brake clamp on a clamp connector through a hydraulic station, driving a first brake shoe and a second brake shoe to form double-sided emergency braking with a brake disc, storing the integral kinetic energy of a testing machine by the first inertia flywheel set and the second inertia flywheel set, measuring torque in real time by using a torque sensor arranged on a transmission main shaft, measuring braking rotation speeds of the transmission main shaft and a transmission shaft by using an encoder and the encoder respectively, analyzing changes of rotation speeds of the transmission main shaft and the transmission shaft in an emergency braking process, measuring positive pressure, friction force and vibration displacement signals of the first brake shoe and the brake disc in emergency braking by using a three-dimensional force sensor and a vibration sensor arranged between the first brake shoe and the second hydraulic brake clamp, and monitoring temperature field changes of a braking interface in real time by using a thermal infrared imaging camera arranged on one side of the brake disc;
And stopping the data acquisition after the encoder detects that the rotating speed of the transmission main shaft is 0 and the acquired values of the sensors are stable, storing the data for analysis, and mainly researching the braking performance of the brake shoe material and the tribological behavior between the steel wire rope and the liner in the variable braking process according to the test data.
The beneficial effects are that: the invention adopts the grooves on the brake disc, assembles the steel wire rope-gasket, realizes the braking monitoring of the mine hoisting system combined with the steel wire rope bearing simulation, can be used for evaluating the braking performance of the brake shoe material and the tribology behavior between the steel wire rope and the gasket, adopts the hydraulic coupler, slows down the impact when the tester rotates, plays a certain overload protection role, and realizes stepless speed regulation; calculating according to the working conditions of the hoists of different mines and different loads to obtain equivalent rotational inertia, and then calculating corresponding dimensions according to the density of the used materials to manufacture inertia flywheel sets with different specifications and sizes, so that the inertia flywheel sets can be freely combined and assembled and are easy to assemble and install, and the inertia flywheel sets are arranged into detachable inertia flywheel sets, so that the adjustment of the integral inertia is realized; the steel wire rope can be pre-tightened by adopting the sliding table with self-locking property; the multi-physical signal comprehensive measurement device adopting the torque sensor, the three-dimensional force sensor, the vibration sensor, the encoder and the thermal infrared imaging camera tests the braking behavior of the mine hoist, and realizes the braking monitoring of the mine hoist system by combining the steel wire rope bearing simulation.
Drawings
FIG. 1 is a front view of a brake monitoring device of a closed loop wire rope hoist system of the present invention;
FIG. 2 is a top view of a brake monitoring device of the closed loop wire rope hoist system of the present invention;
FIG. 3 is a schematic view of a hydraulic station apparatus for use with the present invention;
FIG. 4 is a schematic illustration of a braking system according to the present invention;
fig. 5 is a schematic diagram of a brake monitoring device of the closed loop wire rope hoist system of the present invention.
In the figure: 1. the whole base of the testing machine; 2. a motor base; 3. a thermal infrared camera; 4. a three-phase asynchronous motor; 5. a wire rope; 6. an inertial flywheel; 7. a hydraulic slipway base; 8. a transmission main shaft; 9. an encoder I; 10. a bearing; 11. a first bearing seat; 12. a thermal infrared camera mount; 13. a first hydraulic brake clamp; 14. a three-dimensional force sensor; 15. a first brake shoe; 16. a brake disc; 17. a wire rope pad; 18, a second hydraulic brake clamp; 19. a vibration sensor; 20a second brake shoe; 21. a second bearing seat; 22. a torque sensor; 23. a fluid coupling; 24. an encoder II; 25. an inertial flywheel set I; 26. a flange connecting disc I; 27. bearing and bearing seat III; 28. a transmission shaft; 29. an S-shaped tension sensor; 30. a driving wheel; 31. a wire rope liner; 32 bearings and bearing seats thereof are four; 33. an inertia flywheel set II; 34. a hydraulic slipway; 35. a flange connection disc II; 36. a hydraulic cylinder; 37. and a clamp connector.
Detailed Description
The present invention will now be described with reference to the drawings and specific embodiments,
As shown in fig. 1 and 2, the brake monitoring device of the closed loop steel wire rope lifting system of the invention comprises a tester base 1, a driving system, a transmission system, steel wire rope pre-tightening, an inertia flywheel 6 and a measuring system for collecting various data, wherein the driving system, the transmission system, the steel wire rope pre-tightening and the inertia flywheel 6 are respectively arranged on the tester base 1, and the measuring system is used for collecting various data
The driving system comprises a three-phase asynchronous motor 4, wherein the bottom of the three-phase asynchronous motor 4 is arranged on a tester base 1 through a motor base 2, the three-phase asynchronous motor 4 is connected with a transmission main shaft 8 through a hydraulic coupler 23, the three-phase asynchronous motor 4 drives the transmission main shaft 8 to rotate through the hydraulic coupler 23, and meanwhile, torque is transmitted through the change of the liquid torque of the hydraulic coupler 23, so that the effects of automatic transmission adaptability function, impact reduction, torsional vibration isolation function, overload protection and stepless speed regulation are realized, and the operation is stable;
The transmission system comprises a brake disc 16 arranged on a transmission main shaft 8, a first bearing seat 11 and a second bearing seat 21 are respectively arranged at the front and the rear of the brake disc 16 through bearings 10, wherein brake systems are arranged at the two sides of the brake disc 16, the brake systems comprise a first hydraulic brake clamp 13 and a second hydraulic brake clamp 18 which are respectively arranged through clamp connecting bodies 37, a first brake shoe 15 is arranged between the first hydraulic brake clamp 13 and the brake disc 16, and a second brake shoe 20 is arranged between the second hydraulic brake clamp 18 and the brake disc 16; the thickness of the brake disc 16 is 60-80mm; the first hydraulic brake clamp 13 and the second hydraulic brake clamp 18 are connected to the base 2 through screws, the contact surface area of the first brake shoe 15, the second brake shoe 20 and the brake disc 16 is 25mm multiplied by 25mm, and the first hydraulic brake clamp 13 and the second hydraulic brake clamp 18 apply braking loading force through hydraulic oil by a hydraulic station to realize braking action after the three-phase asynchronous motor 4 is closed, and the friction coefficient is 0.2-0.6.
The steel wire rope pre-tightening system comprises a transmission shaft 28, a transmission wheel 30 is arranged on the transmission shaft 28, a steel wire rope liner II 31 is arranged on the transmission wheel 30, a steel wire rope liner I17 is arranged on a brake disc 16, the transmission wheel 30 is connected with the brake disc 16 through a steel wire rope 5, a bearing and a bearing seat III 27 assembled on a hydraulic sliding table 34 and a bearing seat IV 32 thereof are respectively arranged on the transmission shaft 28 at two sides of the transmission wheel 30, the inertial flywheel 6 comprises a first inertial flywheel set 25 arranged on the transmission shaft 28 outside the bearing and the bearing seat III 27, a second inertial flywheel set 33 arranged on the transmission shaft 28 at the bearing and the bearing seat IV 32 side of the bearing and the bearing seat V, the first inertial flywheel set 25 is fixed and conveniently detached through a flange connection disc I26, the second inertial flywheel set 33 is fixed and conveniently detached through a flange II 35, and a hydraulic cylinder 36 is arranged on the hydraulic sliding table 34. The first inertia flywheel set 25 and the second inertia flywheel set 33 are convenient to detach and replace through the first flange connection disc 26 and the second flange connection disc 35, different flywheel assembly types are different, and are combined and assembled according to the lifts of different mines and working conditions under different loads which are simulated as required, so that equivalent moment of inertia is obtained, corresponding dimensions are calculated according to the density of used materials, and the corresponding dimensions are specifically distributed and assembled, so that simulation under different load working conditions is realized.
The measuring system comprises a first encoder 9 arranged at the end part of the transmission main shaft 8, a second shaft sleeve type torque sensor 22 arranged at the position, close to the hydraulic coupler 23, of the transmission main shaft 8, a second encoder 24 arranged at the end part of the transmission shaft 29, a three-dimensional force sensor 14 arranged between a first brake shoe 15 and a first hydraulic brake clamp 13, a vibration sensor 19 arranged on the first hydraulic brake clamp 13, and a three-dimensional force sensor 14 and a vibration sensor 19 symmetrically arranged between a second brake shoe 20 and a second hydraulic brake clamp 18, wherein an S-shaped tension sensor 29 is arranged between a hydraulic sliding table 34 and a hydraulic sliding table base 7, and a thermal infrared imaging camera 3 arranged at one side of the brake disc 16 through a bracket, wherein the vibration sensor 19, the three-dimensional force sensor 14, the torque sensor 22, the S-shaped tension sensor 29, the first encoder 9 and the second encoder 24 are all connected with a computer through a data acquisition card.
Embodiment 1,
A monitoring method of a brake monitoring device of a closed loop steel wire rope lifting system comprises the following steps:
Firstly, a hydraulic cylinder 36 is driven by a hydraulic station, a piston rod of the hydraulic cylinder 36 pushes a hydraulic sliding table 34 to drive a driving wheel 30 on the sliding table to move, so that a steel wire rope 5 with two ends connected with a brake disc 16 and the driving wheel 30 is tensioned, then the hydraulic station maintains pressure, the sliding table pushed by the piston rod cannot move backwards, tensioning and self-locking of the steel wire rope 5 are realized, and tensioning force is acquired through an S-shaped tension sensor 29;
According to different loads of the simulated mine hoist, the first inertial flywheel set 25 and the second inertial flywheel set 33 with different types and weights are fixed through the first flange connection disc 26 and the second flange connection disc 35 to realize corresponding working conditions; firstly, calculating equivalent inertia of an actual mine hoist to be simulated, and selecting a first inertia flywheel set 25 and a second inertia flywheel set 33 according to the combination of different inertia flywheel sets after uniform scaling, thereby realizing the adjustment of the integral inertia of the tester;
Starting a three-phase asynchronous motor 4, wherein the three-phase asynchronous motor 4 outputs power to a driving transmission main shaft 8 through a hydraulic coupler 23, the main shaft 8 is driven to drive a brake disc 16 to rotate, a steel wire rope 5 is then used for driving a driving wheel 30 to rotate, the simulation working condition operation of the mine hoist is realized, and in the operation process, the regulation and control of the rotating speed are carried out through the hydraulic coupler 23, so that the simulation under the working conditions with different operation speeds is realized;
Then the simulation of the emergency braking of the mine hoist is started: firstly, turning off a power supply of a three-phase asynchronous motor 4, applying braking specific pressure in a range of 1.6-2.0MPa to a first hydraulic brake clamp 13 and a second hydraulic brake clamp 18 on a clamp connecting body 37 through a hydraulic station, driving a first brake shoe 15 and a second brake shoe 20 to form double-sided emergency braking with a brake disc 16, storing the integral kinetic energy of a testing machine at the moment, using a torque sensor 22 arranged on a transmission main shaft 8 to measure torque in real time, using an encoder 9 and an encoder 24 to measure the braking rotation speed of the transmission main shaft 8 and a transmission shaft 28 respectively, so as to analyze the change of the rotation speeds of the transmission main shaft 8 and the transmission shaft 28 in the emergency braking process, and using a three-dimensional force sensor 14 and a vibration sensor 19 arranged between the first brake shoe 15 and the first hydraulic brake clamp 13 and between the second brake shoe 20 and the second hydraulic brake clamp 18 to measure positive pressure and friction force between the first brake shoe 15 and the brake disc 30 and vibration displacement signals of the first vibration brake shoe 15 during emergency braking, and using a thermal imaging field 3 arranged on one side of the brake disc 16 to monitor the temperature change of a braking interface in real time;
And stopping the data acquisition after the encoder 9 detects that the rotating speed of the transmission main shaft 8 is 0 and the acquired values of the sensors are stable, storing the data for analysis, and mainly researching the braking performance of the brake shoe material and the tribological behavior between the steel wire rope and the liner in the variable braking process according to the test data.
The first encoder 9, the second encoder 24, the two three-dimensional force sensors 14 and the two vibration sensors 19 are respectively arranged between the first brake shoe 15 and the first hydraulic brake clamp 13, between the second brake shoe 20 and the second hydraulic brake clamp 18, the two three-dimensional force sensors 14 are respectively arranged between the second brake shoe 20 and the second hydraulic brake clamp 18 and between the first brake shoe 15 and the second hydraulic brake clamp 13, the shaft sleeve type torque sensor 22 is arranged on the transmission main shaft 8, the S-shaped tension sensor 29 is arranged between the sliding table 34 and the base thereof, and the thermal infrared imaging camera 3 is arranged on one side of the brake disc 16 through a bracket thereof. The vibration sensor 19, the three-dimensional force sensor 14, the torque sensor 22, the S-shaped tension sensor 29, the encoder 9 and the encoder 24 are connected with a computer through a data acquisition card.
In a specific test, first, the hydraulic cylinder 36 is driven by the hydraulic station, so that the sliding table 34 slides, and maintains pressure to form a self-locking function, so as to prevent the sliding, and a pretightening force is applied to the steel wire rope 5 assembled on the brake disc 16 and the driving wheel 30, so that the steel wire rope is tensioned, and the pretightening force can be used for signal acquisition through the S-shaped tension sensor 29.
Meanwhile, the first inertia flywheel set 25 and the second inertia flywheel set 33 which are connected by the flange connection disc 26 and the flange connection disc 35 can be disassembled and assembled according to different loads of the simulated mine hoist, and the whole inertia of the testing machine is adjusted.
Then the three-phase asynchronous motor 4 is started, the transmission main shaft 8 is driven through the hydraulic coupler 23, the brake disc 16 on the main shaft 8 is driven to rotate, the driving wheel 30 is driven to rotate through the steel wire rope, the simulation of the working condition operation of the mine hoist is realized, in the operation process, the regulation and control of the rotating speed are carried out through the hydraulic coupler 23, and the simulation under the working conditions with different operation speeds is realized.
Then, starting to simulate the emergency braking of the mine hoist, firstly closing the power supply of the three-phase asynchronous motor 4, applying braking specific pressure within the range of 1.6-2.0MPa to the first hydraulic braking clamp 13 and the second hydraulic braking clamp 18 on the clamp connecting body 37 through the hydraulic station, driving the first braking shoe 15 and the second braking shoe 20 to form double-sided emergency braking with the brake disc 16, and bearing certain rotational speed kinetic energy through an inertia system.
The torque is measured by a torque sensor 22 arranged on the transmission main shaft 8, the braking rotation speeds of the transmission main shaft and the transmission shaft 28 are measured by an encoder 9 and an encoder 24 respectively, the rotation speed change in the braking process is analyzed, the temperature field change of a braking interface is monitored in real time by a thermal infrared imaging camera 3 arranged on one side of the brake disc 16 by using two three-dimensional force sensors 14 arranged between the first brake shoe 15 and the first hydraulic brake clamp 13 and between the second brake shoe 20 and the second hydraulic brake clamp 18 and two vibration sensors 19 arranged between the first brake shoe 20 and the second brake clamp 18 and between the first brake shoe 15 and the second brake shoe 20 respectively, and the positive pressure and the friction force between the first brake shoe 15 and the second brake shoe 20 and the vibration displacement signals of the first vibration brake shoe 15 and the second brake shoe 20 respectively.
And stopping the data acquisition until the rotating speed of the transmission main shaft 8 is 0 and the acquired values of the sensors are stable, storing the data for analysis, and mainly researching the braking performance of the brake shoe material and the tribological behavior between the steel wire rope and the liner in the variable braking process according to the test data.
Claims (4)
1. The utility model provides a braking monitoring devices of closed loop wire rope hoisting system which characterized in that: comprises a tester base (1), a driving system, a transmission system, a steel wire rope pre-tightening system, an inertial flywheel (6) and a measuring system for collecting various data are respectively arranged on the tester base (1), wherein
The driving system comprises a three-phase asynchronous motor (4), wherein the bottom of the three-phase asynchronous motor (4) is arranged on a base (1) of the testing machine through a motor base (2), the three-phase asynchronous motor (4) is connected with a transmission main shaft (8) through a hydraulic coupler (23), the three-phase asynchronous motor (4) drives the transmission main shaft (8) to rotate through the hydraulic coupler (23), and meanwhile, torque is transmitted through the change of the hydraulic torque of the hydraulic coupler (23), so that the effects of automatic transmission adaptability function, impact and torsional vibration damping function, overload protection and stepless speed regulation are realized, and the operation is stable;
The transmission system comprises a brake disc (16) arranged on a transmission main shaft (8), a first bearing seat (11) and a second bearing seat (21) are respectively arranged at the front and rear sides of the brake disc (16) through bearings (10), a brake system is arranged at two sides of the brake disc (16), the brake system comprises a first hydraulic brake clamp (13) and a second hydraulic brake clamp (18) which are respectively arranged through clamp connectors (37), a first brake shoe (15) is arranged between the first hydraulic brake clamp (13) and the brake disc (16), and a second brake shoe (20) is arranged between the second hydraulic brake clamp (18) and the brake disc (16);
The steel wire rope pre-tightening system comprises a transmission shaft (28), a transmission wheel (30) is arranged on the transmission shaft (28), the transmission wheel (30) is connected with a brake disc (16) through a steel wire rope (5), a bearing and a bearing seat III (27) assembled on a hydraulic sliding table (34) and a bearing seat IV (32) thereof are respectively arranged on two sides of the transmission wheel (30), the inertia flywheel (6) comprises a transmission shaft (28) arranged on the outer side of the bearing and the bearing seat III (27), an inertia flywheel group I (25) is arranged on the transmission shaft (28) arranged on the side of the bearing and the bearing seat IV (32), an inertia flywheel group II (33) is arranged on the transmission shaft (28) arranged on the side of the bearing and the bearing seat IV (32), the inertia flywheel group I (25) is fixed and convenient to detach through a flange connection disc I (26), the inertia flywheel group II (33) is fixed and convenient to detach through a flange connection disc II (35), and a hydraulic cylinder (36) is arranged on the hydraulic sliding table (34);
a second steel wire rope liner (31) is arranged on the driving wheel (30), and a first steel wire rope liner (17) is arranged on the brake disc (16);
The measuring system comprises a first encoder (9) arranged at the end part of the transmission main shaft (8), a shaft sleeve type torque sensor (22) arranged at the position, close to the hydraulic coupler (23), of the transmission main shaft (8), a second encoder (24) arranged at the end part of the transmission shaft (28), a three-dimensional force sensor (14) arranged between a first brake shoe (15) and a first hydraulic brake clamp (13), a vibration sensor (19) arranged on the first hydraulic brake clamp (13), and a three-dimensional force sensor (14) and a vibration sensor (19) symmetrically arranged between a second brake shoe (20) and a second hydraulic brake clamp (18), wherein an S-shaped tension sensor (29) is arranged between a hydraulic sliding table (34) and a hydraulic sliding table base (7), and the two encoders (24) are arranged on one side of the brake disc (16) through a bracket, and all connected with a computer through a data acquisition card.
2. The brake monitoring device of a closed loop wire rope hoist system of claim 1, characterized in that: the first inertia flywheel set (25) and the second inertia flywheel set (33) are convenient to detach and replace through the first flange connection disc (26) and the second flange connection disc (35), different flywheel sets are different in variety matching, and are combined and assembled according to different mine hoists which are simulated as required and working conditions under different loads, so that equivalent rotational inertia is obtained, corresponding sizes are calculated according to used material densities, and the corresponding sizes are specifically distributed and assembled, so that simulation under different load working conditions is realized.
3. The brake monitoring device of a closed loop wire rope hoist system of claim 1, characterized in that: the thickness of the brake disc (16) is 60-80mm; the first hydraulic brake clamp (13) and the second hydraulic brake clamp (18) are connected to the base (2) through screws, the contact surface areas of the first brake shoe (15) and the second brake shoe (20) and the brake disc (16) are 25mm multiplied by 25mm, the first hydraulic brake clamp (13) and the second hydraulic brake clamp (18) apply braking loading force through hydraulic oil by a hydraulic station to realize braking action after the three-phase asynchronous motor (4) is closed, and the friction coefficient is 0.2-0.6.
4. A monitoring method using a brake monitoring device of a closed loop wire rope hoisting system according to any of claims 1-3, characterized by the steps of:
Firstly, a hydraulic cylinder (36) is driven by a hydraulic station, a piston rod of the hydraulic cylinder (36) pushes a hydraulic sliding table (34) to drive a driving wheel (30) on the sliding table to move, so that a steel wire rope (5) with two ends connected with a brake disc (16) and the driving wheel (30) is tensioned, then the hydraulic station maintains pressure, the sliding table pushed by the piston rod cannot move backwards, tensioning self-locking of the steel wire rope (5) is realized, and tensioning force is acquired through an S-shaped tension sensor (29);
According to different loads of the simulated mine hoist, the first inertial flywheel set (25) and the second inertial flywheel set (33) with different types and weights are fixed through the first flange connecting disc (26) and the second flange connecting disc (35) to realize corresponding working conditions; firstly, calculating equivalent inertia of an actual mine hoist to be simulated, and selecting a first inertia flywheel set (25) and a second inertia flywheel set (33) according to the combination of different inertia flywheel sets after uniform scaling, thereby realizing the adjustment of the integral inertia of the tester;
Starting a three-phase asynchronous motor (4), wherein the three-phase asynchronous motor (4) outputs power to a driving transmission main shaft (8) through a hydraulic coupler (23), the main shaft (8) is driven to drive a brake disc (16) to rotate, and then a steel wire rope (5) is used for driving a driving wheel (30) to rotate, so that the simulation working condition operation of the mine hoist is realized, and in the operation process, the rotation speed is regulated and controlled through the hydraulic coupler (23), so that the simulation under the working conditions with different operation speeds is realized;
Then the simulation of the emergency braking of the mine hoist is started: firstly, the power supply of the three-phase asynchronous motor (4) is closed, a hydraulic pressure station is used for applying a braking specific pressure in a range of 1.6-2.0MPa to a first hydraulic braking clamp (13) and a second hydraulic braking clamp (18) on a clamp connecting body (37), a first braking shoe (15) and a second braking shoe (20) are driven to form double-sided emergency braking with a brake disc (16), at the moment, a first inertia flywheel set (25) and a second inertia flywheel set (33) store the integral kinetic energy of the testing machine, a torque sensor (22) arranged on a transmission main shaft (8) is used for measuring torque in real time, an encoder (9) and an encoder (24) are used for measuring the braking rotational speeds of the transmission main shaft (8) and a transmission shaft (28) respectively, so that the change of the rotational speeds of the transmission main shaft (8) and the transmission shaft (28) in the emergency braking process is analyzed, a three-dimensional force sensor (14) arranged between the first braking shoe (15) and the first hydraulic braking clamp (13) and a three-dimensional force sensor (14) arranged between the second braking shoe (20) and the second hydraulic braking clamp (18) and a vibration sensor (19) is used for measuring the vibration signal between the first braking shoe (15) and the second braking shoe (20) and the brake shoe (30) and the vibration brake block (30) when the first vibration sensor (19) and the vibration brake disc is used for measuring the vibration signal is used, real-time monitoring of the temperature field change of the braking interface is carried out by using a thermal infrared imaging camera (3) arranged at one side of the braking disc (16);
And stopping the data acquisition after the encoder (9) detects that the rotating speed of the transmission main shaft (8) is 0 and the acquired values of the sensors are stable, storing the data for analysis, and mainly researching the braking performance of the brake shoe material and the tribological behavior between the steel wire rope and the liner in the variable braking process according to the test data.
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| CN109250595A (en) * | 2018-10-10 | 2019-01-22 | 中国矿业大学 | Console mode vertical shaft hoisting joint debugging test device and method |
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| CN100501369C (en) * | 2005-12-27 | 2009-06-17 | 中国矿业大学 | High-speed tester for friction between steel wire rope and liner |
| JP2008222403A (en) * | 2007-03-15 | 2008-09-25 | Meidensha Corp | Hoisting machine for elevator |
| KR101477019B1 (en) * | 2014-11-11 | 2014-12-29 | 주식회사 엘지엠호이스트 | Emergency mechanical brake hoist |
| CN104634686B (en) * | 2015-03-10 | 2017-05-03 | 中国矿业大学 | Twisted-type hoister steel wire rope interlayer friction detection device and method |
| CN105858517B (en) * | 2016-06-17 | 2018-01-02 | 中国矿业大学 | Ultradeep well multi-lay winding wire ropes and reel contact condition monitoring device and method |
| CN109305633A (en) * | 2018-11-26 | 2019-02-05 | 山西腾然科技有限公司 | The full electrical brake system of mine hoist |
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| CN106680005A (en) * | 2016-12-26 | 2017-05-17 | 中国矿业大学 | Dynamic monitoring device for braking process of high-speed elevator in kilometer-depth deep well |
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